Fluid Connector

Abstract

The present invention relates to a fluid connector to be connected to a connecting hole drilled in a main pipe, the fluid connector comprising: a socket at least a portion of which is inserted into the connecting hole; an elastic bushing movably mounted on the socket such that at least a portion of it is inserted into the connecting hole together with the socket; a washer movably mounted on the socket such that it is positioned outside the main pipe in a state facing the elastic bushing; and a clamping nut screwed onto the socket such that it is positioned outside the main pipe in a state facing the washer; the elastic bushing is elastically deformed by pressure transmitted via the socket and the washer when the clamping nut is screwed into the socket, and is configured to pressurize an inner corner located at a lower end and an outer corner located at an upper end of an inner surface of the connecting hole in the height direction of the main pipe, while simultaneously pressurizing in at least one of the longitudinal direction and circumferential direction of the main pipe.

Description

[Technical Field]

[0001] The present invention relates to a fluid connector for connecting a branch pipe to a main pipe. [Background technology]

[0002] Piping is a component for supplying water or other fluids (hereinafter referred to as "water") supplied from a supply source to a destination.

[0003] However, when the water supply route is complicated or there are many demand destinations, it may be necessary to branch the supply route. For this reason, fluid connectors have been developed and are used to connect branch pipes to the main pipe.

[0004] In conventional fluid connectors, a socket head (hereinafter referred to as a "socket head") provided on the fluid connector is inserted into a connecting hole drilled in a main pipe so that a branch pipe can be connected, and then the socket head and the surrounding area of ​​the connecting hole are pressed in the thickness direction of the main pipe using a screw or other connecting method so that the inner surface of the surrounding area of ​​the connecting hole and the socket head are in close contact with each other, thereby connecting the socket to the connecting hole.

[0005] Generally, when high-pressure water is supplied from a supply source to a main pipe, the high pressure of the water is applied to the main pipe along the circumferential direction and longitudinal direction perpendicular to the thickness direction, causing the main pipe to expand.

[0006] However, conventional fluid connectors couple the socket to the main pipe by applying pressure only in the thickness direction to the socket head and the periphery of the coupling hole, which expands in the circumferential and longitudinal directions due to pressure applied from the water, making it difficult to grip the periphery of the coupling hole. As a result, conventional fluid connectors often have problems in that when the main pipe expands due to water supplied from a supply source, the socket becomes separated from the coupling hole or there is play between the socket and the inner circumferential surface of the coupling hole. Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention is intended to solve the problems of the prior art described above, and its purpose is to provide a fluid connector with an improved structure that can grip and fix a main pipe connected to a fluid supply source not only in the height direction or thickness direction, but also in at least one of the circumferential direction and longitudinal direction. [Means for solving the problem]

[0008] A preferred embodiment of the present invention for solving the above-mentioned problems relates to a fluid connector to be connected to a connecting hole drilled in a main pipe, and includes: a socket at least a portion of which is inserted into the connecting hole; an elastic bushing movably mounted on the socket so that at least a portion of it is inserted into the connecting hole together with the socket; a washer movably mounted on the socket so that it is positioned outside the main pipe while facing the elastic bushing; and a locking nut threaded onto the socket so that it is positioned outside the main pipe while facing the washer. The elastic bushing is elastically deformed by pressure transmitted through the socket and the washer when the locking nut is threaded onto the socket, and is configured to pressurize an inner corner located at a lower end and an outer corner located at an upper end of the inner circumferential surface of the connecting hole in the height direction of the main pipe, while also pressurizing in at least one of the longitudinal and circumferential directions of the main pipe. [Effects of the Invention]

[0009] The present invention relates to a fluid connector and has the following effects.

[0010] First, the present invention provides an elastic bushing with an inner seal portion and an outer seal portion that pressurize the inner and outer corners of the inner peripheral surface of the connecting hole drilled in the main pipe in the height direction of the main pipe, while simultaneously pressurizing the main pipe in at least one of the longitudinal and circumferential directions. As a result, the present invention provides a fluid connector that can be firmly connected to the main pipe by the elastic bushing so that it does not become separated from the main pipe when the main pipe expands in the longitudinal and circumferential directions due to high-pressure water, and prevents play that could cause water leakage between the outer peripheral surface of the elastic bushing and the inner peripheral surface of the connecting hole.

[0011] Second, the present invention can be fixed to the through-hole by using an elastic bushing to apply pressure to the inner and outer corners of the connection hole in the longitudinal and circumferential directions of the main pipe, which have higher rigidity than the thickness direction of the main pipe. As a result, the present invention can minimize deformation of the main pipe due to installation of the fluid connector, compared to conventional fluid connectors that are installed by applying pressure only in the thickness direction of the main pipe. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is an exploded perspective view of a fluid connector and a main pipe according to a first embodiment of the present invention. [Figure 2] 2 is a perspective view of the fluid connector and main pipe shown in FIG. 1; FIG. [Figure 3] 3 is a cross-sectional view of the fluid connector and the main pipe shown in FIG. 2, viewed from the longitudinal direction of the main pipe. [Figure 4] 3 is a cross-sectional view of the fluid connector and the main pipe shown in FIG. 2, viewed from the width direction of the main pipe. [Figure 5] FIG. 2 is a cross-sectional view of the main pipe as viewed from the longitudinal direction of the main pipe. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 8 is a front view of the socket shown in FIG. 7. [Figure 9] FIG. 8 is a side view of the socket shown in FIG. 7. [Figure 10] FIG. 8 is a cross-sectional view of the socket shown in FIG. 7. [Figure 11] FIG. [Figure 12] FIG. 12 is a cross-sectional view of the resilient bushing shown in FIG. 11. [Figure 13] FIG. 2 is a perspective view of the washer as viewed from above. [Figure 14] FIG. 14 is a perspective view of the washer shown in FIG. 13 as viewed from below. [Figure 15] FIG. 14 is a cross-sectional view of the washer shown in FIG. 13 as viewed from the longitudinal direction of the main pipe. [Figure 16] FIG. 14 is a cross-sectional view of the washer shown in FIG. 13 as viewed from the width direction of the main pipe. [Figure 17] FIG. [Figure 18] FIG. 18 is a cross-sectional view of the clamping nut shown in FIG. 17. [Figure 19-21] 10A and 10B are diagrams for explaining a method of installing the fluid connector on the main pipe. [Figure 22-23] 10A and 10B are diagrams for explaining the principle by which the elastic bushing grips the main pipe wall body. [Figure 24-25] 10A and 10B are diagrams for explaining a method of connecting a branch pipe to a main pipe. [Figure 26] FIG. 10 is an exploded perspective view of a fluid connector according to a second embodiment of the present invention. [Figure 27] FIG. 27 is a perspective view of the fluid connector shown in FIG. 26; [Figure 28] 28 is a cross-sectional view of the fluid connector and the main pipe shown in FIG. 27, viewed in the longitudinal direction of the main pipe. [Figure 29] 28 is a cross-sectional view of the fluid connector and the main pipe shown in FIG. 27, viewed from the width direction of the main pipe. FIG. [Figure 30] FIG. [Figure 31] FIG. 31 is a front view of the socket shown in FIG. 30. [Figure 32]FIG. 31 is a side view of the socket shown in FIG. 30. [Figure 33] FIG. 31 is a cross-sectional view of the socket shown in FIG. 30. [Figure 34] FIG. [Figure 35] FIG. 35 is a cross-sectional view of the resilient bushing shown in FIG. 34. [Figure 36] FIG. 2 is a perspective view of the washer as viewed from above. [Figure 37] FIG. 37 is a perspective view of the washer shown in FIG. 36 as seen from below. [Figure 38] FIG. 37 is a cross-sectional view of the washer shown in FIG. 36 as viewed from the longitudinal direction of the main pipe. [Figure 39] FIG. 37 is a cross-sectional view of the washer shown in FIG. 36 as viewed from the width direction of the main pipe. [Figure 40] FIG. [Figure 41] FIG. 41 is a cross-sectional view of the clamping nut shown in FIG. 40. [Figure 42] FIG. [Figure 43] FIG. 43 is a cross-sectional view of the packing shown in FIG. 42. [Figure 44] 10A and 10B are diagrams showing how the gap between the socket and the branch pipe is sealed by the packing. [Figure 45-48] 10A and 10B are diagrams for explaining a method of connecting a main pipe and a branch pipe using a fluid connector. [Figure 49] FIG. 10 is an exploded perspective view of a fluid connector and a main pipe according to a third embodiment of the present invention. [Figure 50] FIG. 50 is a perspective view of the fluid connector and main pipe shown in FIG. 49 ; [Figure 51] 51 is a cross-sectional view of the fluid connector and the main pipe shown in FIG. 50 as viewed in the longitudinal direction of the main pipe. [Figure 52] 51 is a cross-sectional view of the fluid connector and the main pipe shown in FIG. 50, viewed from the width direction of the main pipe. [Figure 53] FIG. 2 is a cross-sectional view of the main pipe as viewed from the longitudinal direction of the main pipe. [Figure 54] FIG. [Figure 55] FIG. [Figure 56] FIG. 56 is a front view of the socket shown in FIG. 55. [Figure 57] FIG. 56 is a side view of the socket shown in FIG. 55. [Figure 58] FIG. 56 is a cross-sectional view of the socket shown in FIG. 55. [Figure 59] FIG. 2 is a perspective view of the washer as viewed from above. [Figure 60] FIG. 60 is a perspective view of the washer shown in FIG. 59 as seen from below. [Figure 61] FIG. 60 is a cross-sectional view of the washer shown in FIG. 59 as seen from the longitudinal direction of the main pipe. [Figure 62] FIG. 60 is a cross-sectional view of the washer shown in FIG. 59 as seen from the width direction of the main pipe. [Figure 63-75] 10A and 10B are diagrams for explaining a method of connecting a main pipe and a branch pipe using a fluid connector. [Figure 76] FIG. 10 is a view showing a state in which the fluid connector according to the fourth embodiment of the present invention is separated from the fluid source. [Figure 77] 77 shows the fluid connector shown in FIG. 76 coupled to a fluid source. [Figure 78-79] 10A and 10B are diagrams illustrating a method for drilling a coupling hole in a fluid source wall. [Figure 80] FIG. [Figure 81] FIG. [Figure 82] FIG. [Figure 83] FIG. [Figure 84] FIG. [Figure 85] FIG. [Figure 86] FIG. [Figure 87] FIG. [Figure 88] FIG. [Figure 89] FIG. [Figure 90] FIG. [Figure 91] FIG. [Fig. 92-95] 10A and 10B are diagrams illustrating a method of installing a fluid connector to a fluid source. [Figure 96] 10A and 10B are diagrams for explaining the principle by which the elastic bushing grips the fluid source wall body. [Figure 97] FIG. 10 is a view showing a state in which the fluid connector according to the fifth embodiment of the present invention is separated from the fluid source. [Figure 98] FIG. 98 shows the fluid connector shown in FIG. 97 coupled to a fluid source. [Figures 99-100] 10A and 10B are diagrams illustrating a method for drilling a coupling hole in a fluid source wall. [Figure 101] FIG. [Figure 102] FIG. [Figure 103] FIG. 10 is a view showing a state in which an inner pressure surface is formed on a socket head. [Figure 104] FIG. [Figure 105] FIG. [Figure 106] FIG. [Fig. 107-113] 10A and 10B are diagrams illustrating a method of installing a fluid connector to a fluid source. [Figure 114] 10A and 10B are diagrams for explaining the principle by which the socket body and the washer grip the fluid source wall body. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, several embodiments of the present invention will be described in detail with reference to the drawings. When assigning reference numerals to components in each drawing, it should be noted that the same components are assigned the same numerals as much as possible, even if they are displayed in different drawings. Furthermore, when describing the embodiments of the present invention, if a detailed description of related known structures or functions is deemed to hinder understanding of the embodiments of the present invention, the detailed description will be omitted.

[0014] In describing components of embodiments of the present invention, terms such as "first," "second," "A," "B," "(a)," and "(b)" may be used. These terms are merely used to distinguish the component from other components and do not limit the nature, order, or sequence of the components. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted as idealized or overly formal unless expressly defined in this application.

[0015] FIG. 1 is a separated perspective view of a fluid connector and a main pipe according to a first embodiment of the present invention, FIG. 2 is a combined perspective view of the fluid connector and main pipe shown in FIG. 1, FIG. 3 is a cross-sectional view of the fluid connector and main pipe shown in FIG. 2 as viewed from the longitudinal direction of the main pipe, and FIG. 4 is a cross-sectional view of the fluid connector and main pipe shown in FIG. 2 as viewed from the width direction of the main pipe.

[0016] 5 is a cross-sectional view of the main pipe as viewed in the longitudinal direction of the main pipe, and FIG. 6 is a plan view of the main pipe.

[0017] 1 to 4, a fluid connector 100 according to a first embodiment of the present invention may include a socket 110, an elastic bushing 120, a washer 130, a locking nut 140, and the like.

[0018] There is no particular limitation on the type of main pipe 1 on which the fluid connector 100 can be installed. For example, the main pipe 1 may be a pipe such as an agricultural water pipe or a water pipe, which is made of a material such as hard plastic or metal that has enough rigidity to maintain a predetermined shape even when no fluid is contained in the interior 1c of the main pipe 1, and has a thickness equal to or greater than a predetermined standard thickness.

[0019] The fluid connector 100 is connectable to a connecting hole 4b drilled in the wall of the main pipe 1 (hereinafter referred to as the "main pipe wall 1a") so as to connect the interior 1c of the main pipe 1 to the outside. Therefore, as shown in FIGS. 5 and 6, in order to install the fluid connector 100 in the main pipe 1, a connecting hole 1b for connecting the fluid connector 100 must first be drilled using a punch or other drilling tool at a specific position of the main pipe 1 to which the branch pipe 2 is to be connected. The connecting hole 1b is preferably in the height direction of the main pipe 1, perpendicular to the longitudinal or width direction of the main pipe 1, but is not limited thereto. The connecting hole 1b is preferably circular, but is not limited thereto.

[0020] The following description of the fluid connector 100 is based on the case where a circular coupling hole 1b is drilled in the height direction of the main piping wall 1a. The area surrounding the coupling hole 1b in the entire area of ​​the main piping wall 1a is named the coupling hole peripheral portion 1d, the corner connecting the inner surface of the coupling hole peripheral portion 1d to the inner circumferential surface of the coupling hole 1b is named the inner corner 1e of the coupling hole 1b, and the corner connecting the outer surface of the coupling hole peripheral portion 1d to the inner circumferential surface of the coupling hole 1b is named the outer corner 1f of the coupling hole 1b.

[0021] 7 is a perspective view of the socket, FIG. 8 is a front view of the socket shown in FIG. 7, FIG. 9 is a side view of the socket shown in FIG. 7, and FIG. 10 is a cross-sectional view of the socket shown in FIG. 7.

[0022] The socket 110 is a member for connecting the main pipe 1 and the branch pipe so that the fluid flowing along the main pipe 1 can be transmitted to the branch pipe 2. The socket 110 can include a socket body 111, a first male screw thread 113, a socket head 115, a discharge hole 117, etc.

[0023] First, the socket body 111 has a cylindrical shape that extends elongated along the height direction of the fluid connector 100. The socket body 111 has a diameter that is smaller than the diameter of the coupling hole 1b by a predetermined ratio.

[0024] Next, the first male thread 113 is formed to protrude from the outer circumferential surface of the socket body 111. In particular, the first male thread 113 is preferably formed at a predetermined clearance from each of the upper and lower ends of the socket body 111, but is not limited thereto. Here, the lower end of the socket body 111 refers to an end of both side ends of the socket body 111 where a socket head 115 (described later) is formed, and the upper end of the socket body 111 refers to an end of both side ends of the socket body 111 opposite the lower end.

[0025] Furthermore, the first male thread 113 has an outer diameter that is larger than the diameter of the socket body 111 by a predetermined ratio and smaller than the diameter of the coupling hole 1b by a predetermined ratio. In other words, when drilling the coupling hole 1b, the worker must drill the coupling hole 1b so that it has a diameter that is larger than the outer diameter of the first male thread 113 by a predetermined ratio.

[0026] A guide groove 113a is formed in the first male thread 113 along the height direction of the fluid connector 100 and into which a guide block 132c of a washer 130 (described later) is inserted so as to be movable along the height direction of the fluid connector 100. A detailed description of the guide groove 113a will be given later together with a description of the guide block 132c.

[0027] Next, the socket head 115 is formed at the lower end of the socket body 111 so as to be concentric with the socket body 111 .

[0028] The socket head 115 has a diameter that is the same as the diameter of the coupling hole 1b or that is smaller than the diameter of the coupling hole 1b by a predetermined ratio.

[0029] In addition, an inner pressurizing surface 115a is formed on the upper surface of the socket head 115, extending from the lower end of the socket body 111 and sloping downward so that its height gradually decreases from the center of the socket 110 to the periphery. In particular, the inner pressurizing surface 115a may be formed so that its inclination angle gradually decreases as it approaches an imaginary center line C1 that passes through the center point of the socket 110 in the longitudinal direction of the main pipe 1, and its inclination angle gradually increases as it moves away from the center line C1. The socket head 115 having such inner pressurizing surface 115a has a curved shape that is bent in an arch shape with a curvature corresponding to the curvature of the main pipe 1 based on the center line C1, so that the highest point of the inner pressurizing surface 115a is located on the center line C1.

[0030] The discharge hole 117 is drilled inside the socket 110 so as to penetrate the socket head 115 and the socket body 111 in the height direction of the fluid connector 100 .

[0031] FIG. 11 is a perspective view of the elastic bushing, and FIG. 12 is a cross-sectional view of the elastic bushing shown in FIG.

[0032] The elastic bushing 120 is a member for connecting the fluid connector 100 to the main pipe 1 and sealing the connecting hole 1b.

[0033] The elastic bushing 120 is made of an elastic material that is elastically deformable. For example, the elastic bushing 120 may be made of a rubber material.

[0034] In addition, the elastic bushing 120 is provided so as to apply pressure to the inner peripheral surface of the coupling hole 1b not only in the height direction of the main pipe 1 but also in the longitudinal and circumferential directions of the main pipe 1, which form a predetermined angle with the height direction of the main pipe 1, thereby coupling the elastic bushing 120 and the fluid connector 100 including the same to the main pipe 1. To this end, the elastic bushing 120 may have a coupling portion 122, a locking portion 124, an insertion hole 126, etc.

[0035] First, the connecting portion 122 is formed so that at least a portion thereof is elastically deformed by the pressure acting when the socket 110 and the tightening nut 140 are screwed together, thereby pressurizing the inner corner 1e and the outer corner 1f of the connecting hole 1b in the height direction of the main pipe 1, while at the same time pressurizing the main pipe 1 in at least one of the longitudinal direction and the circumferential direction.

[0036] To this end, the connecting portion 122 has a length that is longer than the depth of the connecting hole 1b by a predetermined ratio so that the lower portion can penetrate the connecting hole 1b by a predetermined length and protrude into the interior 1c of the main pipe 1.

[0037] There is no particular limitation on the shape of the coupling portion 122. For example, the coupling portion 122 may be configured in a cylindrical shape having a diameter that is the same as the diameter of the coupling hole 1b or that is smaller than the diameter of the coupling hole 1b by a predetermined ratio.

[0038] Next, the locking portion 124 is formed so that it can lock onto and adhere closely to the outer surface of the coupling hole peripheral portion 1d while elastically deforming due to the pressure acting when the socket 110 and the clamping nut 140 are screwed together. For example, the locking portion 124 may have a disk shape that extends from the upper end of the coupling portion 122 so as to be concentric with the coupling portion 122 and has a diameter that is larger than the diameter of the coupling hole 1b by a predetermined ratio.

[0039] Next, the insertion hole 126 is formed so as to be concentric with the coupling portion 122 and the locking portion 124 and to penetrate the coupling portion 122 and the locking portion 124 in the height direction of the fluid connector 100 .

[0040] The insertion hole 126 may include a first insertion hole 126a, a second insertion hole 126b, a third insertion hole 126c, and so on.

[0041] The first insertion hole 126a is formed to be located at the bottom of the insertion hole 126. More specifically, the first insertion hole 126a is formed at the bottom of the coupling portion 122 The first insertion hole 126a has a diameter that is equal to the diameter of the socket body 111 or is larger than the diameter of the socket body 111 by a predetermined ratio and is smaller than the outer diameter of the first male thread 113 by a predetermined ratio so that the lower end of the socket body 111, on which the first male thread 113 is not formed, can be inserted.

[0042] The first insertion hole 126 may have a bending guide surface 126f formed at an inclined lower portion of the inner circumferential surface such that the diameter of the first insertion hole 126 gradually increases toward the lower end. When pressure is applied to the coupling portion 122 in the height direction of the main pipe 1 during the process of screwing the socket 110 and the locking nut 140 together, the bending guide surface 126f can guide the lower portion of the coupling portion 122 so that the lower portion of the coupling portion 122 slides and bends in at least one of the longitudinal direction and circumferential direction of the main pipe 1 along the inner pressure surface 115a of the socket 110.

[0043] The second insertion hole 126b is located above the first insertion hole 126a but extends from the upper end of the first insertion hole 126a to be connected to the first insertion hole 126a. More specifically, the second insertion hole 126b is formed to penetrate the upper part of the coupling portion 122 and the lower part of the locking portion 124. The second insertion hole 126b has a diameter that is the same as the outer diameter of the first external thread 113 or is larger than the outer diameter of the first external thread 113 by a predetermined ratio so that the first external thread 113 can be inserted therein. As a result, the second insertion hole 126b and the first insertion hole 126a can be connected to form a stepped structure. In this case, the bottom surface of the second insertion hole 126b can support the lower end of the first external thread 113. Hereinafter, the bottom surface of the second insertion hole 126b will be referred to as a support surface 126d.

[0044] Third insertion hole 126c Although it is located above the second insertion hole 126b, 126b The second insertion hole 126b is formed to extend from the upper end thereof so as to be connected to the second insertion hole 126b. Third insertion hole 126c is the locking part 124 The third insertion hole 126c has a diameter larger than that of the second insertion hole 126b by a predetermined ratio. As a result, the third insertion hole 126c and the second insertion hole 126b can be connected to form a stepped structure. In this case, the inner circumferential surface and bottom surface of the third insertion hole 126c can function as an alignment groove 126e that cooperates with an outer pressing surface 132a of a washer 130 (described later) to help the elastic bushing 120 to be uniformly elastically deformed in accordance with the curvature of the main pipe 1 while being aligned in a predetermined manner.

[0045] As described above, by forming the elastic bushing 120, the lower portion of the coupling portion 122, in which the first insertion hole 126a is formed, elastically deforms due to pressure applied when the socket 110 and the locking nut 140 are screwed together, thereby functioning as an inner seal portion 127 that fits tightly against the inner corner 1e of the coupling hole 1b. Therefore, it is preferable that the first insertion hole 126a have a depth equal to or greater than a predetermined reference depth so that the fluid connector 100 can be applied to various types of main pipes 1 having different thicknesses of the main pipe wall 1a. In addition, the corner portion connecting the upper portion of the coupling portion 122, in which the second insertion hole 126b is formed, and the locking portion 124 functions as an outer seal portion 128 that fits tightly against the outer corner 1f of the coupling hole 1b, while elastically deforming due to pressure applied when the socket 110 and the locking nut 140 are screwed together. A more detailed description of the inner seal portion 127 and the outer seal portion 128 will be provided later.

[0046] 13 is a perspective view of the washer seen from above, FIG. 14 is a perspective view of the washer shown in FIG. 13 seen from below, FIG. 15 is a cross-sectional view of the washer shown in FIG. 13 seen from the longitudinal direction of the main pipe, and FIG. 16 is a cross-sectional view of the washer shown in FIG. 13 seen from the width direction of the main pipe.

[0047] The washer 130 is a member for applying pressure to the elastic bushing 120 by switching the pressure applied when the socket 110 and the locking nut 140 are screwed together to a predetermined mode.

[0048] Washer 130 is also suitable for plastic and other sockets. 110 and tightening nut 140 The screw may be made of a material having a rigidity sufficient to maintain its shape without being deformed by the pressure applied when the screw is screwed into the screw.

[0049] The washer 130 may also include a washer body 132, a flange 134, and the like.

[0050] First, the washer body 132 has a cylindrical shape with a diameter that is larger than the diameter of the coupling hole 1b by a predetermined ratio.

[0051] In addition, the washer body 132 may have an outer pressure surface 132a formed on the outer peripheral surface of the lower end so as to be able to pressurize the alignment groove 126e of the elastic bushing 120, an insertion hole 132b formed in the center in the height direction of the fluid connector 100 so that the first male thread 113 can be movably inserted, and a guide block 132c formed on the inner peripheral surface of the insertion hole 132b in the height direction of the fluid connector 100.

[0052] The outer pressure surface 132a is formed on the outer peripheral surface of the lower end of the washer body 132, and is configured as an upwardly inclined surface whose height gradually increases from the center of the washer 130 to the outer periphery. In particular, the outer pressure surface 132a has a gradually increasing inclination angle so that it can move away from an imaginary center line C2 that passes through the center of the washer 130 along the longitudinal direction of the main pipe 1. Low Such an outer pressure surface 132a teeth , Most The pipe has a curved arch shape that has a curvature corresponding to the curvature of the main pipe 1 with the center line C2 as the reference so that the high point is located on the center line C2.

[0053] The insertion hole 132b is formed through the center of the washer body 132 in the height direction of the fluid connector 100. The insertion hole 132b has a diameter that is the same as the outer diameter of the first external thread 113 or is larger than the outer diameter of the first external thread 113 by a predetermined ratio so that the first external thread 113 can be movably inserted therein.

[0054] The guide block 132c protrudes from the inner circumferential surface of the insertion hole 132b toward the center of the insertion hole 132b so as to be positioned on the center line C2 or an imaginary vertical line perpendicular to the center line C2, but is formed to extend long along the height direction of the fluid connector 100. Furthermore, the guide block 132c has a width smaller than that of the guide groove 113a of the first male screw thread 113 so that the guide block 132c can be inserted into the guide groove 113a of the first male screw thread 113 and be movable in the height direction of the fluid connector 100.

[0055] Next, the flange 134 is formed to extend from the lower end of the washer body 32 so as to be connected to the upper end of the outer pressure surface 132a.

[0056] In addition, the flange 134 has a disk shape with a diameter that is larger than the diameter of the washer body 132 by a predetermined ratio, but has a curved shape that is bent in an arch shape so that the highest point with the maximum height is located on the center line C2 and has a curvature that corresponds to the curvature of the main pipe 1 based on the center line C2.

[0057] FIG. 17 is a perspective view of the clamping nut, and FIG. 18 is a cross-sectional view of the clamping nut shown in FIG.

[0058] Next, the clamping nut 140 is a member for connecting the elastic bushing 120 to the connecting hole 1b and also for connecting the branch pipe 2 to the fluid connector 100.

[0059] The clamping nut 140 preferably has a cylindrical shape extending along the height direction of the fluid connector 100, but is not limited to this. The clamping nut 140 may have a first coupling hole 142, a second coupling hole 144, a packing 146, etc.

[0060] The first coupling hole 142 is drilled in the height direction of the fluid connector 100 at the bottom of the locking nut 140 so that the socket body 111 can be inserted therein. The first coupling hole 142 has a predetermined length so that when the coupling portion 122 of the elastic bushing 120 is coupled to the main pipe 1 through the screw engagement of the socket 110 and the locking nut 140, the upper end of the socket body 111 coupled to the first coupling hole 142 comes into contact with the packing 146 but does not come into contact with the end of the branch pipe 2 coupled to the second coupling hole 144.

[0061] A first female thread 142a is formed on the inner circumferential surface of the first coupling hole 142 so as to be able to threadably engage with the first male thread 113 of the socket body 111. Then, the clamping nut 140 can be rotated in a predetermined tightening direction along the first male thread 113 so that the socket body 111 is gradually inserted into the first coupling hole 142, thereby gradually coupling the socket 110 to the clamping nut 140; or, the clamping nut 140 can be rotated in a loosening direction opposite to the tightening direction along the first male thread 113 so that the socket body 111 is gradually pulled out of the first coupling hole 142, thereby gradually separating the socket 110 from the clamping nut 140.

[0062] The second coupling hole 144 is drilled in the upper part of the clamping nut 140 along the height direction of the fluid connector 100 so that the end of the branch pipe 2 can be inserted therein and the lower end of the second coupling hole 144 coincides with the upper end of the first coupling hole 142. The second coupling hole 144 has a predetermined length so that when the end of the branch pipe 2 is coupled to the second coupling hole 144, the end of the branch pipe 2 comes into contact with the packing 146 but does not come into contact with the upper end of the socket body 111 coupled to the first coupling hole 142.

[0063] A second female thread 144a is formed on the inner peripheral surface of the second coupling hole 144 so as to be able to threadably engage with a second male thread 2c formed on one end 2b of the branch pipe 2. The specific coupling relationship between the second coupling hole 144 and the branch pipe 2 will be described later.

[0064] Meanwhile, the first and second coupling holes 142 and 144 may have different diameters depending on the difference between the diameter of the socket body 111 and the diameter of one end 2b of the branch pipe 2. For example, if the diameter of one end 2b of the branch pipe 2 is larger than the diameter of the socket body 111, the second coupling hole 144 may have a larger diameter than the first coupling hole 142.

[0065] The packing 146 has an annular ring shape with a through hole 146a formed in the center.

[0066] The packing 146 is interposed between the upper end of the socket body 111 connected to the first connecting hole 142 and one end 2b of the branch pipe 2 connected to the second connecting hole 144, and is installed so as to seal the gap between the upper end of the socket body 111 and one end 2b of the branch pipe 2.

[0067] For example, when the second coupling hole 144 has a diameter larger than that of the first coupling hole 142, the packing 146 may be installed so that it is placed on the bottom surface of the second coupling hole 144 that coincides with the upper end of the first coupling hole 142. Such packing 146 has the same structure as a regular packing, and therefore a detailed description thereof will be omitted.

[0068] Figures 19 to 21 are diagrams for explaining how to install the fluid connector on the main pipe, Figures 22 and 23 are diagrams for explaining the principle by which the elastic bushing grips the main pipe wall, and Figures 24 and 25 are diagrams for explaining how to connect the branch pipe to the main pipe.

[0069] First, a connecting hole 1b is drilled in the main pipe wall body 1a using a drilling member.

[0070] Next, the socket body 111 and the first male thread 113 are inserted into the insertion hole 126 so that the lower end of the first male thread 113 of the socket 110 is supported by the support surface 126d of the elastic bushing 120, thereby joining the socket 110 and the elastic bushing 120.

[0071] Thereafter, the socket head 115, the lower part of the socket body 111 connected to the socket head 115, and the coupling part 122 of the elastic bushing 120 are inserted into the coupling hole 1b so that the locking part 124 of the elastic bushing 120 is locked at the highest point on the outer circumferential surface of the coupling hole peripheral part 1d and the outer seal part 128 of the elastic bushing 120 contacts the outer corner 1f. In this case, the socket head 115 is inserted into the coupling hole 1b so that the center line C1 coincides with the longitudinal direction of the main pipe 1. Then, the entire area of ​​the socket head 115 and the lower part of the socket body 111 penetrate the coupling hole 1b and protrude into the interior 1c of the main pipe 1. At the same time, as shown in Figure 19(b), when the main pipe 1 is viewed from the width direction of the main pipe 1, the locking portion 124 is locked onto the outer peripheral surface of the connecting hole peripheral portion 1d, and the lower portion of the connecting portion 122 penetrates the connecting hole 1b by a predetermined length and protrudes into the interior 1c of the main pipe 1. Correspondingly, as shown in Figure 19(a), when the main pipe 1 is viewed from the longitudinal direction of the main pipe 1, the locking portion 124 is separated from the outer peripheral surface of the main pipe 1 in the positive height direction, and the lower portion of the connecting portion 122 protrudes into the interior 1c of the main pipe 1 by a length that is shorter than when the main pipe 1 is viewed from the width direction of the main pipe 1, or is located inside the connecting hole 1b.

[0072] Next, the socket body 111 and the first male screw thread 113 are inserted into the insertion hole 132b of the washer 130 so that the outer pressure surface 132a of the washer 130 faces the alignment groove 126e of the elastic bushing 120, thereby coupling the washer 130 to the socket 110. In this case, it is preferable that the washer 130 is coupled to the socket 110 so that the outer pressure surface 132a is spaced apart from the alignment groove 126e of the elastic bushing 120 by a predetermined clearance.

[0073] The washer 130 is coupled to the socket 110 so that the guide block 132c is inserted into the guide groove 113a of the first male thread 113 and is movable in the height direction of the fluid connector 100. The washer 130 is then arranged so that the center line C2 coincides with the longitudinal direction of the main pipe 1, but the flange 134 surrounds the outer circumferential surface of the main pipe 1 in the circumferential direction of the main pipe 1.

[0074] Thereafter, with the upper end of the first male thread 113 of the socket 110 placed on the lower end of the first female thread 142a of the clamping nut 140, the clamping nut 140 is rotated in a predetermined tightening direction along the first male thread 113 of the socket 110 to tighten it, thereby provisionally fastening the clamping nut 140 and the socket 110 so that the upper end of the socket body 111 and the upper part of the first male thread 113 are inserted a predetermined length into the first coupling hole 142. In this case, it is preferable that the clamping nut 140 is coupled to the socket 110 so that its lower end is placed on the upper end of the washer body 132, but this is not limited to this.

[0075] When the upper end of the first external thread 113 is placed on the lower end of the first internal thread 142a, the clamping nut 140 is rotated along the first external thread 113 to be tightened. As the socket 110 rises and the clamping nut 140 descends, the gap between the socket head 115 and the clamping nut 140 gradually decreases. As a result, the socket body 111 is tightened to the first end of the clamping nut 140. binding hole 1 through the lower opening of 142 binding hole 142, the gap between the socket head 115, the elastic bushing 120, the washer 130, and the clamping nut 140 gradually decreases. Therefore, when the clamping nut 140 is tightened so that the socket head 115, the elastic bushing 120, the washer 130, and the clamping nut 140 are in close contact with each other, if the clamping nut 140 is further tightened, the socket head 115 will be inserted into the elastic bushing 120. 120The clamping nut 140 presses the washer 130 in the positive thickness direction of the main pipe 1, and the clamping nut 140 presses the washer 130 in the negative height direction of the main pipe 1. The washer 130 also presses the elastic bushing 130 in the negative height direction of the main pipe 1. 120 is pressed in the height direction of the main pipe 1. Then, the elastic bushing 120 is pressed in both the up and down directions by the socket head 115 and the washer 130, and can be elastically deformed.

[0076] Next, the clamping nut 140 is rotated in a predetermined tightening direction along the first male thread 113 of the socket 110 until the upper end of the socket body 111 contacts the packing 146 of the clamping nut 140, thereby finally connecting the clamping nut 140 and the socket 110.

[0077] When the tightening nut 140 and the socket 110 are finally joined in this manner, the flange 134 of the washer 130 presses the locking portion 124 toward the outer peripheral surface of the main pipe 1, causing the locking portion 124 to be elastically deformed into a curved shape by the flange 134 and to adhere closely to the outer peripheral surface of the main pipe 1.

[0078] Furthermore, through the aforementioned inclined structure, the outer pressing surface 132a of the washer 130 presses the inner surface of the alignment groove 126e of the elastic bushing 120 in the negative height direction of the main pipe 1, and simultaneously presses in at least one of the longitudinal and circumferential directions of the main pipe 1. As a result, the coupling portion 122 elastically deforms, and the lower portion of the coupling portion 122 protrudes through the coupling hole 1b into the interior 1c of the main pipe 1 over the entire area of ​​the coupling hole 1b. At the same time, the outer seal portion 128 elastically deformed by the outer pressing surface 132a presses the outer corner 1f of the coupling hole 1b in the negative height direction of the main pipe 1, and simultaneously presses in at least one of the longitudinal and circumferential directions of the main pipe 1.

[0079] Because the main pipe 1 has a cylindrical shape with a predetermined curvature, the depth of the connection hole 1b, the angle of the outer corner 1f, and the height of the outer corner 1f vary depending on the portion of the connection hole 1b. As a result, the ratio of the pressure acting in the longitudinal direction of the main pipe 1 to the pressure acting in the circumferential direction of the main pipe 1, out of the total pressure applied to the outer corner 1f by the outer seal portion 128, varies depending on the portion of the connection hole 1b. More specifically, when a cross section of the main pipe 1 taken along the center line C1 of the socket body 111 is viewed from the width direction of the main pipe 1, the angle of the outer corner 1f reaches its maximum (vertical) and the height of the outer corner 1f reaches its maximum, so that the outer seal portion 128 applies pressure to the outer corner 1f only in the longitudinal direction of the main pipe 1, without applying pressure in the circumferential direction of the main pipe 1. In contrast to this, when a cross section of the main pipe 1 cut perpendicular to the center line C1 of the socket body 111 is viewed from the longitudinal direction of the main pipe 1, the angle of the outer angle 1f becomes the minimum value (acute angle), the height of the outer angle 1f becomes the minimum value, and the outer seal portion 128 does not pressurize the outer angle 1f in the longitudinal direction of the main pipe 1, but only in the circumferential direction of the main pipe 1. In other words, as one moves from the longitudinal direction to the circumferential direction of the main pipe 1, the pressure acting in the longitudinal direction of the main pipe 1 gradually decreases, and the pressure acting in the circumferential direction of the main pipe 1 gradually increases.

[0080] The outer pressure surface 132a has a gradually increasing inclination angle so that it can move away from the center line C2. Low As a result, as described above, when the socket 110 and the washer 130 are arranged, the contact angle between the outer pressure surface 132a and the outer corner 1f becomes approximately uniform over the entire area of ​​the outer corner 1f. As a result, the total pressure applied to the outer corner 1f by the outer seal portion 128, which is the sum of the pressure acting in the longitudinal direction of the main pipe 1 and the pressure acting in the circumferential direction of the main pipe 1, can become approximately uniform over the entire area of ​​the outer corner 1f.

[0081] Furthermore, due to the inclined structure described above, the inner pressure application surface 115a of the socket head 115 applies pressure to the inner seal portion 127 protruding into the interior 1c of the main pipe 1 in the positive height direction of the main pipe 1, while also applying pressure in at least one of the longitudinal and circumferential directions of the main pipe 1. Then, the inner seal portion 127 elastically deformed by this inner pressure application surface 115a applies pressure to the inner corner 1e of the coupling hole 1b in the positive height direction of the main pipe 1, while also applying pressure in at least one of the longitudinal and circumferential directions of the main pipe 1.

[0082] Because the main pipe 1 has a cylindrical shape with a predetermined curvature, the depth of the connection hole 1b, the angle of the inner corner 1e, and the height of the inner corner 1e vary depending on the portion of the connection hole 1b. As a result, the ratio of the pressure acting in the longitudinal direction of the main pipe 1 to the pressure acting in the circumferential direction of the main pipe 1, out of the total pressure applied to the inner corner 1e by the inner seal 127, varies depending on the portion of the connection hole 1b. More specifically, when a cross section of the main pipe 1 taken along the center line C1 of the socket body 111 is viewed from the width direction of the main pipe 1, the angle of the inner corner 1e is at its minimum (vertical) and the height of the inner corner 1e is at its maximum, so that the inner seal 127 applies pressure to the inner corner 1e only in the longitudinal direction of the main pipe 1, without applying pressure in the circumferential direction of the main pipe 1. In contrast to this, when a cross section of the main pipe 1 cut perpendicular to the center line C1 of the socket body 111 is viewed from the longitudinal direction of the main pipe 1, the angle of the inner angle 1e becomes a maximum value (obtuse angle), the height of the inner angle 1e becomes a minimum value, and the inner seal portion 127 does not pressurize the inner angle 1e in the longitudinal direction of the main pipe 1, but only in the circumferential direction of the main pipe 1. Correspondingly, as one moves from the longitudinal direction to the circumferential direction of the main pipe 1, the pressure acting in the longitudinal direction of the main pipe 1 gradually decreases, and the pressure acting in the circumferential direction of the main pipe 1 gradually increases.

[0083] The inner pressure surface 115a is formed so that the inclination angle gradually decreases toward the center line C1. As a result, as described above, when the socket 110 is placed, the contact angle between the inner pressure surface 115a and the inner corner 1e becomes approximately uniform over the entire area of ​​the inner corner 1e. As a result, the total pressure applied to the inner corner 1e by the inner seal portion 127, which is the sum of the pressure acting in the longitudinal direction of the main pipe 1 and the pressure acting in the circumferential direction of the main pipe 1, can be approximately uniform over the entire area of ​​the inner corner 1e.

[0084] As described above, the first insertion hole 126 is formed at its lower portion with a bending guide surface 126f that guides the lower portion of the coupling portion 122 so that, when pressure is applied to the coupling portion 122 in the height direction of the main pipe 1, the lower portion of the coupling portion 122 slides along the inner pressure surface 115a of the socket 110 in at least one of the longitudinal and circumferential directions of the main pipe 1. With this bending guide surface 126f, the lower portion of the coupling portion 122 where the inner seal portion 127 is located can bend in at least one of the longitudinal and circumferential directions of the main pipe 1 while sliding along the bending guide surface 126f, thereby elastically deforming consistently according to a predetermined deformation mode.

[0085] Next, the branch pipe 2 is connected to the clamp nut 140 .

[0086] The branch pipe 2 is a device for forming a branch stream branched off from a mainstream flowing along the main pipe 1, and may include an on-off valve 2a for opening and closing the branch pipe 2, and a second male thread 2c formed on the outer surface of one end 2b so as to be able to threadably engage with the second female thread 144a of the clamping nut 140. The branch pipe 2 can be coupled to the clamping nut 140 by inserting the one end 2b into the second coupling hole 144 of the clamping nut 140 and then threading the second male thread 2c into the second female thread 144a of the clamping nut 140.

[0087] When the branch pipe 2 is connected to the tightening nut 140 in this manner, the interior 1c of the main pipe 1 and the branch pipe 2 can be connected via the discharge hole 117 of the socket 110, the first connecting hole 142 and the second connecting hole 144 of the tightening nut 140, and through this, water or other fluids W flowing along the interior 1c of the main pipe 1 can be transmitted to the branch pipe 2.

[0088] As described above, the fluid connector 100 is configured so that the inner corner 1e and the outer corner 1f are kept in contact with the inner seal portion 127 and the outer seal portion 128 over the entire area of ​​the connection hole 1b, and the inner seal portion 127 and the outer seal portion 128 are able to grip the inner corner 1e and the outer corner 1f not only in the height direction of the main pipe 1 but also in at least one of the longitudinal and circumferential directions of the main pipe 1. As a result, the fluid connector 100 can be firmly coupled to the main pipe 1 by the elastic bushing 120 so that the fluid connector 100 does not separate from the main pipe 1 when the main pipe 1 expands in the longitudinal and circumferential directions due to high-pressure water, and play that could cause water leakage can be prevented from occurring between the outer peripheral surface of the elastic bushing 120 and the inner peripheral surface of the connection hole 1b.

[0089] In addition, the fluid connector 100 can be fixed to the connection hole 1b by using the elastic bushing 120 to apply pressure to the inner corner 1e and outer corner 1f of the connection hole 1b in the longitudinal and circumferential directions of the main pipe 1, which have relatively higher rigidity than the thickness direction of the main pipe 1. As a result, the fluid connector 100 can minimize deformation of the main pipe 1 caused by installation of the fluid connector 100, compared to conventional fluid connectors that are installed by applying pressure only in the thickness direction of the main pipe 1.

[0090] The fluid connector 100 also includes an inner pressure surface 115a of the socket head 115, a washer 130 The inner pressure surface 115a of the socket head 115, the outer pressure surface 132a of the flange 134, etc. are arranged so that the inner corner 1e and the outer corner 1f of the main pipe 1 can be uniformly pressurized regardless of the pressure direction. 130By forming the outer pressure surface 132a and flange 134 etc. with an arched structure or curved structure having a curvature corresponding to the curvature of the main pipe 1, it is possible to prevent the fluid connector 100 from coming off the connection hole 1b due to uneven connection force between the pressure directions.

[0091] FIG. 26 is an exploded perspective view of a fluid connector according to a second embodiment of the present invention. 27 FIG. 28 is a cross-sectional view of the fluid connector and main pipe shown in FIG. 27 as viewed from the longitudinal direction of the main pipe, and FIG. 29 is a cross-sectional view of the fluid connector and main pipe shown in FIG. 27 as viewed from the width direction of the main pipe.

[0092] 26 to 29, a fluid connector 200 according to a second embodiment of the present invention may include a socket 210, an elastic bushing 220, a washer 230, a locking nut 240, and a packing 250. The fluid connector 200 has an improved washer 230 and a packing 250 compared to the previously described fluid connector 100. Hereinafter, descriptions of components that are included in the fluid connectors 100 and 200 will be omitted or will be briefly mentioned.

[0093] 30 is a perspective view of the socket, FIG. 31 is a front view of the socket shown in FIG. 30, FIG. 32 is a side view of the socket shown in FIG. 30, and FIG. 33 is a cross-sectional view of the socket shown in FIG. 30.

[0094] The socket 210 may include a socket body 211, a first external thread 213, a socket head 215, a discharge hole 217, and the like.

[0095] Further, the first male screw thread 213 is recessed and formed with a guide groove 213a.

[0096] In addition, an insertion guide surface 215a is formed on the side of the socket head 215, and an inner pressure surface 215b is formed on the upper surface of the socket head 215. Here, the insertion guide surface 215a serves to guide the socket head 215 so that the socket head 215 can be easily inserted into the coupling hole 1b, and preferably has an inclined structure such that the diameter of the socket head 215 gradually decreases toward the lower end of the socket head 215, but is not limited thereto.

[0097] In addition, the inner pressurizing surface 215b may be formed so that the angle of inclination gradually decreases as it approaches the center line C1 and gradually increases as it moves away from the center line C1. The socket head 215 having such an inner pressurizing surface 215b formed thereon has an arch-shaped curved shape with a curvature corresponding to the curvature of the main pipe 1 based on the center line C1, so that the highest point of the inner pressurizing surface 215b is located on the center line C1.

[0098] 34 is a perspective view of the resilient bushing, and FIG. 35 is a cross-sectional view of the resilient bushing shown in FIG.

[0099] The elastic bushing 220 may have a coupling portion 222, a locking portion 224, an insertion hole 226, and the like.

[0100] The outer circumferential surface of the lower portion of the coupling part 222 may be configured as an inclined surface such that the diameter of the coupling part 222 gradually narrows toward the lower end of the coupling part 222. This allows the coupling part 222 to be more easily inserted into the coupling hole 1b.

[0101] The insertion hole 226 may include a first insertion hole 226a, a second insertion hole 226b, a third insertion hole 226c, and so on.

[0102] Also, the first insertion hole 226a A bending guide surface 226f is formed at the lower part of the inner peripheral surface.

[0103] In addition, a support surface 226d is formed on the bottom surface of the second insertion hole 226b.

[0104] Additionally, an alignment groove 226e is formed on the inner circumferential surface and bottom surface of the third insertion hole 226c.

[0105] As described above, by forming the insertion hole 226, the lower part of the coupling part 222, in which the first insertion hole 226a is formed, functions as the inner seal part 227. Therefore, it is preferable that the first insertion hole 226a has a length equal to or greater than a predetermined reference length so that the fluid connector 200 can be applied to main pipes 1 having various thicknesses and diameters. In addition, the corner part connecting the upper part of the coupling part 222, in which the second insertion hole 226b is formed, and the locking part 224 functions as the outer seal part 228, which comes into contact with the outer corner 1f of the coupling hole 1b while being elastically deformed by the outer pressing surface 234 of the washer 230 described later.

[0106] The lower part of the coupling part 222 can function as an inner seal part 227, and the corner part connecting the upper part of the coupling part 222, in which the second insertion hole 226b is formed, and the locking part 224 functions as an outer seal part 228.

[0107] Figure 36 is a perspective view of the washer seen from above, Figure 37 is a perspective view of the washer shown in Figure 36 seen from below, Figure 38 is a cross-sectional view of the washer shown in Figure 36 seen from the longitudinal direction of the main pipe, and Figure 39 is a cross-sectional view of the washer shown in Figure 36 seen from the width direction of the main pipe.

[0108] The washer 230 may include a washer body 231, a flange 232, an alignment protrusion 233, an outer pressure surface 234, a bending guide surface 235, a fixing protrusion 236, and the like.

[0109] First, the washer body 231 has a cylindrical shape with a diameter that is larger than the diameter of the coupling hole 1b by a predetermined ratio.

[0110] In addition, the washer body 231 may have an insertion hole 231a formed in the center thereof so as to penetrate in the height direction of the fluid connector 200, and a guide block 231b formed on the inner surface of the insertion hole 231a so as to protrude along the height direction of the fluid connector 200, so that the first male thread 213 can be movably inserted.

[0111] The insertion hole 231a is formed through the center of the washer body 231 in the height direction of the fluid connector 200 so that the socket body 211 and the first male thread 213 can be movably inserted therein. The insertion hole 231a may also include a first insertion hole 231c formed in the lower part of the washer body 231 and having a diameter equal to or larger than the outer diameter of the first male thread 213 by a predetermined ratio so that the first male thread 213 can be movably inserted therein, and a second insertion hole 231d formed in the upper part of the washer body 231 so that a lower end thereof is connected to an upper end of the first insertion hole 231c and having a diameter larger than the diameter of the first insertion hole 231c by a predetermined ratio. By forming the first insertion hole 231c and the second insertion hole 231d in this manner, the second insertion hole 231d and the first insertion hole 231c are connected to form a staircase structure, and through this, the bottom surface of the second insertion hole 231d can function as a mounting surface 231e on which the lower end of the tightening nut 240 is placed.

[0112] The guide block 231b protrudes from the inner peripheral surface of the insertion hole 231a toward the center of the insertion hole 231a, but is formed to extend long along the height direction of the fluid connector 200. Furthermore, the guide block 231b has a width smaller than that of the guide groove 213a so that the guide block 231b can be inserted into the guide groove 213a of the first male thread 213 and be movable in the height direction of the fluid connector 200.

[0113] The flange 232 is extended from the lower end of the washer body 231 so as to be connected to the lower end of the washer body 231 .

[0114] The flange 232 has a disk shape with a diameter that is larger than the diameter of the washer body 231 by a predetermined ratio. In particular, the flange 232 has a curved arch shape with a curvature that corresponds to the curvature of the main pipe 1 based on the center line C2, so that the highest point of the flange 232, which has the maximum height, is located on an imaginary center line C2 that passes through the center of the washer 230 along the longitudinal direction of the main pipe 1.

[0115] The alignment protrusion 233 is formed to protrude from the lower surface of the flange 232 so that it can be inserted into the alignment groove 226e of the elastic bushing 220 in the negative height direction of the main pipe 1 when the fluid connector 200 is installed in the main pipe 1. The alignment protrusion 233 preferably has a ring shape surrounding the first insertion hole 231c, but is not limited thereto.

[0116] In particular, the alignment protrusions 233 are formed to have a height that gradually decreases as they move away from the center line C2. The alignment protrusions 233 are inserted into the alignment grooves 226e of the elastic bushing 220 to align the elastic bushing 220 in a predetermined arrangement, thereby helping the elastic bushing 220 to undergo constant elastic deformation.

[0117] The outer pressure surface 234 is a flange extending from the upper end of the outer peripheral surface of the alignment projection 233. 232 The outer pressing surface 234 is formed on the bottom surface of the washer 230. The outer pressing surface 234 is configured as an upwardly inclined surface whose height gradually increases from the center to the outer periphery of the washer 230. In particular, the outer pressing surface 234 is formed so that the inclination angle gradually decreases as it moves away from the center line C2 of the washer 230.

[0118] The outer pressing surface 234 extends from the upper end of the outer peripheral surface of the alignment protrusion 233 toward the outer periphery of the washer 230 so as to face the outer corner 1f of the coupling hole 1b across the outer seal portion 228 of the elastic bushing 220 when the fluid connector 200 is installed in the main pipe 1. The outer pressing surface 234 is configured as an upwardly inclined surface whose height gradually increases from the center of the washer 230 toward the outer periphery. In particular, the outer pressing surface 234 is formed so that the inclination angle gradually decreases as it moves away from the center line C2 of the washer 230. The outer pressing surface 234 will be described in more detail below.

[0119] The bending guide surface 235 is formed by extending from the upper end of the outer pressure surface 234 to the outer periphery of the washer body 231. 232 The bending guide surface 235 may be configured as a horizontal plane at its highest point along the center line C2 in the longitudinal direction of the main pipe 1, and may be configured as a downward inclined surface whose height gradually decreases as it gets farther away from the center line C2. As a result, the bending guide surface 235 may bend the locking portion 224 of the elastic bushing 220 so as to closely contact the outer circumferential surface of the main pipe 1.

[0120] The fixing protrusion 236 is formed on the bottom surface of the flange 232 so as to extend from the outer end of the bending guide surface 235 and protrude toward the outer peripheral surface of the main pipe wall 1a. In particular, the fixing protrusion 236 has a predetermined height so that, when the fluid connector 200 is installed in the main pipe 1, the fixing protrusion 236 is in close contact with the outer peripheral surface of a region of the main pipe wall 1a that is located a predetermined distance away from the connecting hole 1b compared to the connecting hole peripheral portion 1d.

[0121] The fixing protrusion 236 has a ring shape and an inner diameter larger than the outer diameter of the locking portion 224 so that it can press against the outer surface of the main pipe wall 1a when installing the fluid connector 200 in the main pipe 1. As a result, the fixing protrusion 236 is in close contact with the outer surface of the main pipe wall 1a so that a frictional force acts between the fixing protrusion 236 and the main pipe wall 1a, thereby fixing the fluid connector 200 so that it does not come off the main pipe 1.

[0122] 40 is a perspective view of the clamping nut, and FIG. 41 is a cross-sectional view of the clamping nut shown in FIG.

[0123] The clamping nut 240 may have a first coupling hole 242, a second coupling hole 244, etc.

[0124] The first coupling hole 242 has a first female screw thread 242a formed on its inner circumferential surface.

[0125] The second coupling hole 244 has a second female screw thread 244a formed on its inner circumferential surface.

[0126] FIG. 42 is a perspective view of the packing, FIG. 43 is a cross-sectional view of the packing shown in FIG. 42, and FIG. 44 is a diagram showing how the packing seals the gap between the socket and the branch pipe.

[0127] The packing 250 has an annular ring shape with a through hole 252 formed in the center, and is made of rubber or other elastically deformable material.

[0128] The packing 250 is connected to the upper end of the socket body 211 connected to the first connecting hole 242 and to one end of the branch pipe 2 connected to the second connecting hole 244. 2b The upper end of the socket body 211 and one end of the branch pipe 2 are interposed between the 2b It is installed so that it can seal between the

[0129] For example, the packing 250 may be installed on the bottom surface 244b of the second connection hole 244 when the second connection hole 244 has a diameter larger than that of the first connection hole 242. In this case, the packing 250 is installed on one end of the branch pipe 2. 2b The diameter is larger than the diameter by a predetermined ratio.

[0130] Such packing 250 may have a through hole 252 formed through the center to allow communication between the socket 210 and the branch pipe 2, and a locking protrusion 254 formed on the outer circumferential surface to be engaged with the second female thread 244a of the tightening nut 240 to fix the packing 250 at a predetermined position in the second coupling hole 244.

[0131] The through-holes 252 include a first through-hole 252a formed in the lower part of the packing 250 and having a diameter equal to or larger than the diameter of the socket body 211 by a predetermined ratio, and a second through-hole 252b formed in the upper part of the packing 250 so that its lower end communicates with the upper end of the first through-hole 252a and having a diameter smaller than the diameter of the socket body 211 by a predetermined ratio. Thus, the first through-hole 252a and the second through-hole 252b are connected to form a staircase structure, and a ceiling surface 252c of the first through-hole 252a can function as a support surface for supporting the socket body 211.

[0132] In addition, the second through-hole 252b preferably has a sloped structure in which the diameter gradually decreases toward the upper end of the packing 250, but is not limited to this. 2b When the branch pipe 2 and the clamping nut 240 are connected by inserting the packing 250 into the second connecting hole 244 of the clamping nut 240, the packing 250 is 2b Even if the diameter of the second through hole 252b is partially expanded while being elastically deformed by the pressure applied by the 2b The contact state between the packing 250 and the nozzle 210 can be stably maintained.

[0133] 45 to 48 are diagrams for explaining a method for connecting a main pipe and a branch pipe using a fluid connector.

[0134] A method for connecting a main pipe and a branch pipe using a fluid connector will be described below with reference to the drawings.

[0135] First, a connecting hole 1b is drilled in the main pipe wall body 1a using a drilling member.

[0136] Next, the socket body 211 and the first external thread 213 are inserted into the insertion hole 226 to couple the socket 210 and the elastic bushing 220 together.

[0137] Thereafter, the socket head 215, the lower part of the socket body 211 connected to the socket head 215, and the coupling part 222 of the elastic bushing 220 are inserted into the coupling hole 1b. In this case, the socket head 215 is inserted into the coupling hole 1b so that the center line C1 coincides with the longitudinal direction of the main pipe 1.

[0138] Next, the socket body 211 and the first male screw thread 213 are inserted into the insertion hole 231 a of the washer 230 , and the washer 230 is coupled to the socket 210 .

[0139] Then, the upper end of the socket body 211 and the first male screw thread 213 The clamping nut 240 is rotated in a predetermined tightening direction along the first male thread 213 of the socket 210 so that the upper part of the clamping nut 240 is inserted a predetermined length into the first connecting hole 242, thereby temporarily connecting the clamping nut 240 and the socket 210.

[0140] Thereafter, the clamping nut 240 is rotated in a predetermined tightening direction along the first male thread 213 of the socket 210 so that the upper end of the socket body 211 comes into contact with the packing 250 of the clamping nut 240, thereby finally connecting the clamping nut 240 and the socket 210.

[0141] When the clamping nut 240 and the socket 210 are finally coupled in this manner, the inner seal portion 227 and the outer seal portion 228 of the elastic bushing 220 are elastically deformed by the inner pressure surface 215b of the socket body 211 and the outer pressure surface 234 of the washer 230, thereby applying pressure to the inner corner 1e and the outer corner 1f of the coupling hole 1b in the height direction of the main pipe 1 and at the same time applying pressure in at least one of the longitudinal direction and the circumferential direction of the main pipe 1 to grip the main pipe 1. In this way, the elastic bushing 220 and the fluid connector 200 can be coupled to the main pipe 1.

[0142] In addition, the inner seal portion 227 and the outer seal portion 228 can be elastically deformed uniformly while the elastic bushing 220 is aligned in a predetermined arrangement due to the fixing protrusion 233 inserted into the alignment groove 226e, thereby preventing the inner seal portion 227 and the outer seal portion 228 from elastically deforming irregularly, thereby preventing a decrease in the bonding force of the elastic bushing 220 to the main pipe 1.

[0143] Thereafter, the branch pipe 2 is connected to the clamp nut 240 .

[0144] Figure 49 is a separated perspective view of a fluid connector and main pipe according to a third embodiment of the present invention, Figure 50 is a combined perspective view of the fluid connector and main pipe shown in Figure 49, Figure 51 is a cross-sectional view of the fluid connector and main pipe shown in Figure 50 as viewed from the longitudinal direction of the main pipe, and Figure 52 is a cross-sectional view of the fluid connector and main pipe shown in Figure 50 as viewed from the width direction of the main pipe.

[0145] FIG. 53 is a cross-sectional view of the main pipe as viewed from the longitudinal direction of the main pipe, and FIG. 54 is a plan view of the main pipe.

[0146] The fluid connector 300 according to the third embodiment of the present invention may include a socket 310, a washer 320, a locking nut 330, a packing 340, etc. The fluid connector 300 has a structure in which some components are modified so that the installation method is different from that of the previously described fluid connectors 100 and 200. Hereinafter, the description of the components that the fluid connectors 100, 200, and 300 include in common will be omitted or will be mentioned briefly.

[0147] The fluid connector 300 is formed by elastically deforming a connecting hole surrounding portion 3d corresponding to the area surrounding a connecting hole 3b drilled at a position where a branch pipe 2 is to be installed in the entire area of ​​the wall of the main pipe 3 (hereinafter referred to as "main pipe wall 3a") to form a wing portion 3e, and then fixing such wing portion 3e using a washer 320 and a socket 310 to connect the fluid connector 300 to the connecting hole 3b and seal the connecting hole 3b.

[0148] Therefore, before installing the fluid connector 300, a connecting hole 3b for connecting the fluid connector 300 must be drilled in the main pipe wall 3a using a punch or other drilling device. The connecting hole 3b is preferably drilled in the thickness direction of the main pipe wall 3a, but is not limited to this. Furthermore, the connecting hole 3b is preferably circular, but is not limited to this.

[0149] For this reason, the main pipe 3 to which the fluid connector 300 is applied is preferably made of a soft material that allows for easy elastic deformation and is thinner than the above-described main pipe 1. For example, the main pipe 3 may be an elastic hose made of an elastic material that can be elastically deformed, such as PVC or rubber. In this case, the main pipe 3 is preferably a braided yarn hose in which woven braided yarn is embedded in a wall so as to prevent the main pipe 3 from breaking or splitting, but is not limited to this.

[0150] As described above, the fluid connector 300 is preferably applied to a main pipe 3 made of a soft material, but is not limited to this. For example, even if the main pipe is made of a hard material, the fluid connector 300 can be installed in a main pipe 3 made of a hard material in an environment where the main pipe 3 is likely to be elastically deformed, such as when the temperature of the installation location is high or when the area around the connection hole of the main pipe is heat-treated at a high temperature.

[0151] On the other hand, the clamping nut 330 and the packing 340 have the same structure as the clamping nut 240 and the packing 250 of the previously described fluid connector 200. Therefore, a description of the clamping nut 330 and the packing 340 will be omitted.

[0152] 55 is a perspective view of the socket, FIG. 56 is a front view of the socket shown in FIG. 55, FIG. 57 is a side view of the socket shown in FIG. 55, and FIG. 58 is a cross-sectional view of the socket shown in FIG. 55.

[0153] The socket 310 may include a socket body 311, a first external thread 313, a socket head 315, a discharge hole 317, a hook 318, an O-ring 319, and the like.

[0154] The socket body 311 has a cylindrical shape that extends elongated along the height direction of the fluid connector 300. The socket body 311 has a diameter that is larger than the diameter of the coupling hole 3b by a predetermined ratio.

[0155] The first male thread 313 is formed to protrude from the outer peripheral surface of the socket body 311 so as to have an outer diameter that is larger than the diameter of the socket body 311 by a predetermined ratio. In particular, the first male thread 313 is preferably formed to be spaced a predetermined clearance from each of the upper and lower ends of the socket body 311. Here, the lower end of the socket body 311 refers to an end of both side ends of the socket body 311 where a socket head 315 (described below) is formed, and the upper end of the socket body 311 refers to an end of both side ends of the socket body 311 opposite the lower end.

[0156] A guide groove 313a into which a guide block 321b of a washer 320 (described later) is inserted so as to be movable along the height direction of the fluid connector 300 is recessed into the first male thread 313 along the height direction of the fluid connector 300. A detailed description of the guide groove 313a will be given later together with a description of the guide block 321b.

[0157] The socket head 315 is formed at the lower end of the socket body 311 so as to be concentric with the socket body 311, and has a first male screw thread. 313 The diameter of the coupling hole 3b is larger than the outer diameter of the socket body 311 by a predetermined ratio. Then, the following relationship is established among the coupling hole 3b, the socket body 311, the first male screw thread 313, and the socket head 315:

[0158] Diameter of socket head 315 > outer diameter of first male screw thread 313 > diameter of socket body 311 > diameter of coupling hole 3b

[0159] In addition, an insertion guide surface 315a is formed on the side surface of the socket head 315 to guide the socket head 315 so that the socket head 315 can be easily inserted into the coupling hole 3b. It is preferable that the insertion guide surface 315a has an inclined structure such that the diameter of the socket head 315 gradually decreases toward the lower end of the socket head 315, but this is not limitative.

[0160] In addition, an inner pressurizing surface 315b is formed on the upper surface of the socket head 315, extending from the lower end of the socket body 311 and sloping downward so that its height gradually decreases from the center of the socket head 315 to the periphery. In particular, the inner pressurizing surface 315b may be formed so that its inclination angle gradually decreases toward an imaginary center line C1 that passes through the center point of the socket 310 in the longitudinal direction of the main pipe 3, and its inclination angle gradually increases as it moves away from the center line C1. The socket head 315 having such an inner pressurizing surface 315b formed thereon has an arch-shaped curved shape with a curvature corresponding to the curvature of the main pipe 3 based on the center line C1, so that the highest point of the inner pressurizing surface 315b is located on the center line C1.

[0161] An O-ring groove 315c is recessed into the inner pressure surface 315b, into which an O-ring 319 can be fitted. The O-ring groove 315c is preferably formed so that its height gradually increases toward the center line C1 and gradually decreases as it moves away from the center line C1, but is not limited to this.

[0162] The discharge hole 317 is drilled inside the socket 310 so as to penetrate the socket head 315 and the socket body 311 in the height direction of the fluid connector 300 .

[0163] The hook 318 is formed to protrude from the side surface of the socket head 315 in the extension direction of the center line C1 of the socket head 315 (the longitudinal direction of the main pipe 3). The hook 318 is preferably formed at a predetermined height on the side surface of the socket head 315 so that it is spaced a predetermined distance from the inner peripheral surface of the main pipe 3 when inserted into the interior 3c of the main pipe 3 through the coupling hole 3b.

[0164] O-ring 319 is made of elastically deformable rubber or other material and is fitted into O-ring groove 315c. O-ring 319 preferably has a thickness that is greater than the depth of O-ring groove 315c by a predetermined ratio. When O-ring 319 is fitted into O-ring groove 315c, O-ring 319 can protrude a predetermined height higher than inner pressure surface 315b.

[0165] Figure 59 is a perspective view of the washer seen from above, Figure 60 is a perspective view of the washer shown in Figure 59 seen from below, Figure 61 is a cross-sectional view of the washer shown in Figure 59 seen from the longitudinal direction of the main pipe, and Figure 62 is a cross-sectional view of the washer shown in Figure 59 seen from the width direction of the main pipe.

[0166] Next, the washer 320 is a member that works in conjunction with the socket head 315 to fix the wing portion 3e of the main pipe 3 in a predetermined shape.

[0167] Washer 320 may be made of plastic or other material having sufficient rigidity to maintain its shape without deformation due to the pressure applied when socket 310 and locking nut 330 are screwed together.

[0168] The washer 320 is provided so as to transmit the pressure applied from the clamping nut 330 and the socket body 311 to the wing portions 3e not only in the thickness direction of the main pipe 3 but also in the circumferential and longitudinal directions of the main pipe 3 when the clamping nut 330 and the socket body 311 are screwed together, thereby fixing the wing portions 3e in multiple directions. For this purpose, the washer 320 may include a washer body 321, a flange 322, etc.

[0169] The washer body 321 has a cylindrical shape with a diameter that is larger than the diameter of the coupling hole 3b by a predetermined ratio.

[0170] The washer body 321 may have an insertion hole 321a formed in the center so that the first male thread 313 and the wing portion 3e formed to contact the first male thread 313 can be inserted, and a guide block 321b formed on the inner surface of the insertion hole 321a and protruding along the height direction of the fluid connector 300.

[0171] The insertion hole 321a may include a first insertion hole 321c formed in the lower part of the washer 320, a second insertion hole 321d formed in the middle part of the washer 320 so that its lower end is connected to the upper end of the first insertion hole 321c, and a third insertion hole 321e formed in the upper part of the washer 320 so that its lower end is connected to the upper end of the second insertion hole 321d.

[0172] Also, on the inner peripheral surface of the first insertion hole 321c, a bending guide surface 321f and the like are formed which are inclined so that the diameter of the first insertion hole 321c gradually increases toward the lower end of the first insertion hole 321c.

[0173] The bending guide surface 321f is preferably formed so that the lower end of the first insertion hole 321c having the largest diameter has a diameter larger than the diameter of the socket head 315, and the upper end of the first insertion hole 321c having the smallest diameter has a diameter larger than the outer diameter of the first male thread 313 and smaller than the diameter of the socket head 315, but is not limited to this. In particular, the bending guide surface 321f is formed so that the inclination angle gradually increases so that the center point of the washer 320 can move away from an imaginary center line C2 that passes through the main pipe 3 in the longitudinal direction.

[0174] The position where the fixing protrusion 321g is formed is not particularly limited, and the fixing protrusion 321g may be formed to protrude in a specific region located between a lower corner 321h of the bending guide surface 321f where the bending guide surface 321f meets the bottom surface of the flange 322, and an upper corner 321i of the bending guide surface 321f where the bending guide surface 321f meets the inner surface of the second insertion hole 321d.

[0175] In addition, it is preferable that the upper corner 321i and the lower corner 321h of the bending guide surface 321f are rounded so as to prevent the wing portion 3e of the main pipe 3 from being suddenly bent and damaged by the bending guide surface 321f, but this is not limited to this.

[0176] The second insertion hole 321d is formed to have the same diameter as the diameter of the upper end of the first insertion hole 321c, and the third insertion hole 321e is formed to have a diameter larger than that of the second insertion hole 321d by a predetermined ratio. The bottom surface of the third insertion hole 321e can then function as a mounting surface 321j on which the lower end of the clamping nut 330 is placed.

[0177] Guide block 321b protrudes from the inner circumferential surface of insertion hole 321a toward the center of insertion hole 321a, but is formed to extend long along the height direction of fluid connector 300. Furthermore, guide block 321b has a width smaller than guide groove 313a so that guide block 321b can be inserted into guide groove 313a of first male thread 313 so as to be movably inserted in the height direction of fluid connector 300.

[0178] The flange 322 is extended from the lower end of the washer body 321 so as to be connected to the lower end of the washer body 321 .

[0179] In addition, the flange 322 has a disk shape with a diameter that is larger than the diameter of the washer body 321 by a predetermined ratio, but has a curved shape that is bent in an arch shape with a curvature that corresponds to the curvature of the main pipe 3 based on the center line C2, so that the highest point with the maximum height is located on the center line C2.

[0180] 63 to 75 are diagrams for explaining a method for connecting a main pipe and a branch pipe using a fluid connector.

[0181] Hereinafter, a method for connecting a main pipe 3 and a branch pipe 2 using a fluid connector 300 will be described with reference to the drawings. As described above, the main pipe 3 is made of an elastic hose that is capable of elastic deformation. Generally, elastic hoses are stored in a slightly compressed state. Here, an example will be given in which the main pipe 3 in a slightly compressed state is connected to the branch pipe 2.

[0182] First, a drilling member is used to drill a coupling hole 3b at a specific position of the main pipe 3, which is in a thinly pressed state.

[0183] Next, under the guidance of the guide groove 313a and the guide block 321b, the washer 320 is coupled to a section of the socket body 311 located on the external side of the main pipe 3 so that the socket body 311 is inserted into the insertion hole 321a of the washer 320.

[0184] Thereafter, the clamping nut 330 is rotated in a predetermined tightening direction along the first male thread 313 and tightened so that the lower end of the clamping nut 330 is placed on the mounting surface 321j of the washer 320, thereby temporarily joining the socket 310 and the clamping nut 330 so that the clamping nut 330 is positioned above the washer 320 but is separated from the socket head 315 by a predetermined marginal distance.

[0185] Next, the main pipe 3 is elastically deformed into a nearly cylindrical shape so that the hook 318 can be inserted into the connecting hole 3b, and the socket 310 is tilted at a predetermined angle so that the end of the hook 318 faces the connecting hole 3b, and then the hook 318 is inserted into the interior 3c of the main pipe 3 through the connecting hole 3b.

[0186] Then, with the hook 318 engaged with the inner peripheral surface of the main pipe 3, the socket head 315 is pressed toward the interior 3c of the main pipe 3 using the principle of leverage, thereby inserting the socket head 315 and the lower part of the socket body 311 connected to the socket head 315 into the interior 3c of the connecting hole 3b, and at the same time, forming a wing portion 3e on the surrounding portion 3d of the connecting hole so as to face the interior 3c of the main pipe 3.

[0187] Thereafter, the clamping nut 330 is rotated in the clamping direction until the wing portion 3e is interposed between the bending guide surface 321f of the washer 320 and the O-ring 319 of the socket head 315, thereby finally connecting the clamping nut 330 to the socket body 311.

[0188] During the process of finally connecting the clamping nut 330 to the socket body 311, the wing 3e is sequentially pressed in the positive height direction of the main pipe 3 by the first male thread 313 and the O-ring 319 of the socket 310, and is turned upside down toward the outside of the main pipe 3 while bending in accordance with the inclination angle of the bending guide surface 321f and the inner pressure surface 315b. In particular, the wing 3e is primarily bent by a predetermined first angle based on the lower corner 321h of the bending guide surface 321f, and is secondarily bent by a second angle relative to the first angle based on the upper corner 321i of the bending guide surface 321f. As a result, the wing 3e can be divided into a first wing 3f that forms the lower part of the wing 3e and is inclined by the first angle, and a second wing 3g that forms the upper part of the wing 3e and is inclined by the second angle, the lower end of which is connected to the upper end of the first wing 3f. As a result, a two-stage sealing structure using the first wing portion 3f and the second wing portion 3g can be formed. In addition, the fixing protrusion 321g can pressurize the first wing portion 3f to fix the first wing portion 3f, and the O-ring 319 can seal the coupling hole 3b by being in close contact with the inner peripheral surface of the first wing portion 3f.

[0189] When the wing portion 3e is turned upside down as described above, the washer 320 and the socket body 311 can press and fix the main pipe wall body 3a not only in the thickness direction of the main pipe 3 but also in at least one of the circumferential direction and the longitudinal direction, thereby allowing the socket 310 to be coupled to the main pipe 3 with the discharge hole 317 connected to the interior 3c of the main pipe 3. In addition, the washer 320 and the socket body 311 can seal the coupling hole 3b to prevent water flowing along the main pipe 3 from leaking out through the coupling hole 3b.

[0190] Next, the branch pipe 2 is connected to the clamp nut 330 .

[0191] The above-mentioned fluid connector 300 is installed by fixing the wing portion 3e, which protrudes a predetermined height from the outside of the main pipe 3, to the fluid connector 300. This allows the fluid connector 300 to be stably connected to the main pipe 3 even when the connection hole 3b of the main pipe 3 has an oval shape or other irregular shape. Compared to conventional fluid connectors, which had to reduce the diameter of the connection hole 3b as much as possible to take into account the height difference that occurs in the connection hole 3b due to the curvature of the main pipe 3, the diameter of the connection hole 3b, the diameter of the socket 310 installed in the connection hole 3b, and the diameter of the discharge hole 317 formed in the socket 310 can be expanded.

[0192] In addition, the fluid connector 300 has an arch-shaped or curved structure having a curvature corresponding to the curvature of the main pipe 3 so that the inner pressure surface 315b of the socket head 315, the bending guide surface 321f of the washer 320, and the flange 322 can apply uniform pressure to the wing portion 3e and the main pipe wall 3a regardless of the pressure direction, thereby preventing the fluid connector 300 from coming off the coupling hole 3b due to uneven coupling force between pressure directions.

[0193] Figure 76 is a diagram showing the fluid connector of the fourth embodiment of the present invention when separated from the fluid source, Figure 77 is a diagram showing the fluid connector shown in Figure 76 when connected to the fluid source, and Figures 78 and 79 are diagrams for explaining a method of drilling a connection hole in the fluid source wall.

[0194] A fluid connector 400 according to a fourth embodiment of the present invention is a device for connecting a fluid source 4 and a fluid guide member. Referring to Figures 76 and 77, the fluid connector 400 may include a socket 410, an elastic bushing 420, a washer 430, a locking nut 440, etc. The fluid connector 400 has a structure in which some components are modified so that it can be installed on a fluid source 4 such as a water tank. Hereinafter, descriptions of components that are included in the fluid connectors 100, 200, 300, and 400 in common will be omitted or will only be briefly mentioned.

[0195] The fluid source 4 refers to a device or facility that stores water or various other fluids (hereinafter referred to as "fluids"). The type of device or facility that can be used as such a fluid source is not particularly limited, and the fluid source may include various devices or facilities that are installed so as to be able to store fluids for purposes such as storing, supplying, transporting, and collecting fluids in various locations such as agricultural sites, commercial sites, industrial sites, and homes, such as tanks, drums, pipes, piping, water collection tanks, sinks, and washbasins.

[0196] The fluid guide member refers to a member that guides the fluid transmitted from the fluid source 4 in a predetermined manner. The type of member that can be used as such a fluid guide member is not particularly limited, and the fluid guide member may be composed of at least one of members that can guide the fluid transmitted from the fluid source 4 in various manners such as transporting, branching, draining, and spraying, such as a pipe, branching pipe, water faucet, valve, nozzle, etc.

[0197] On the other hand, the fluid connector 400 is configured so as to be installed in the wall of the fluid source 4 (hereinafter referred to as the "fluid source wall 4a"), which is made of a highly rigid material such as hard plastic or metal, but has a thickness greater than a predetermined standard thickness.

[0198] The fluid connector 400 is connectable to a connecting hole 4b drilled in the fluid source wall 4a to connect the inside and outside of the fluid source 4. Therefore, in order to install the fluid connector 400, a work of drilling a connecting hole 4b for connecting the fluid connector 400 in the fluid source wall 4a using a punch or other drilling device must first be performed. The connecting hole 4b is preferably drilled in the thickness direction of the fluid source wall 4a, but is not limited to this. The connecting hole 4b is preferably circular, but is not limited to this. The connecting hole 4b is preferably formed in a region of the fluid source wall 4a having a planar structure, but is not limited to this.

[0199] The following description of the fluid connector 400 is based on the case where a circular coupling hole 4b is drilled in the thickness direction of the fluid source wall body 4a. The surrounding area of ​​the entire fluid source wall body 4a surrounding the coupling hole 4b is named the coupling hole peripheral portion 4c, the corner connecting the inner surface of the coupling hole peripheral portion 4c to the inner circumferential surface of the coupling hole 4b is named the inner corner 4d of the coupling hole 4b, and the corner connecting the outer surface of the coupling hole peripheral portion 4c to the inner circumferential surface of the coupling hole 4b is named the outer corner 4e of the coupling hole 4b.

[0200] 80 is a front view of the socket, FIG. 81 is a cross-sectional view of the socket, and FIG. 82 is a plan view of the socket.

[0201] The socket 410 is a member for connecting the fluid source 4 and the fluid guide member so that the fluid contained in the fluid source 4 can be transmitted to the fluid guide member.

[0202] Such a socket 410 may include a socket body 411, a socket head 413, a discharge hole 415, and the like.

[0203] The socket body 411 has a cylindrical shape that extends elongated along the height direction of the fluid connector 400. The socket body 411 also has a diameter that is smaller than the diameter of the coupling hole 4b by a predetermined ratio.

[0204] The socket body 411 has a first male thread 411a formed to protrude from the outer circumferential surface. In particular, the first male thread 411a is preferably formed at a predetermined clearance from each of the upper and lower ends of the socket body 411. Here, the lower end of the socket body 411 refers to an end of both side ends of the socket body 411 where a socket head 413 (described later) is formed, and the upper end of the socket body 411 refers to an end of both side ends of the socket body 411 opposite the lower end.

[0205] Furthermore, the first male thread 411a has an outer diameter that is larger than the diameter of the socket body 411 by a predetermined ratio and smaller than the diameter of the coupling hole 4b by a predetermined ratio. In other words, when drilling the coupling hole 4b, the worker must drill the coupling hole 4b so that it has a diameter that is larger than the outer diameter of the first male thread 411a by a predetermined ratio.

[0206] A guide groove 411b, into which a guide block 432 of a washer 430 (described later) is movably inserted, may be recessed and formed in the first male screw thread 411a along the height direction of the fluid connector 400.

[0207] The socket head 413 is formed to extend from the lower end of the socket body 411 so as to be concentric with the socket body 411. The socket head 413 has a diameter that is larger than the outer diameter of the first male thread 411a by a predetermined ratio and is the same as the diameter of the coupling hole 4b or smaller than the diameter of the coupling hole 4b by a predetermined ratio.

[0208] Additionally, an inner pressure applying surface 413a is formed on the upper surface of the socket head 413. The inner pressure applying surface 413a extends from the lower end of the socket body 411 so as to face an inner seal portion 427 of an elastic bushing 420 (described later) when the fluid connector 400 is installed in the fluid source 4, and is inclined downward so that its height gradually decreases from the center of the socket 410 to the outer periphery. It is preferable that the angle of inclination of the inner pressure applying surface 413a gradually decreases as it approaches the lower end of the socket head 413, but this is not limitative.

[0209] The discharge hole 415 is drilled inside the socket 410 so as to penetrate the socket head 413 and the socket body 411 in the height direction of the fluid connector 400 .

[0210] 83 is a front view of the elastic bushing, FIG. 84 is a cross-sectional view of the elastic bushing, and FIG. 85 is a plan view of the elastic bushing.

[0211] The elastic bushing 420 is a member that connects the fluid connector 400 to the connection hole 4b and also seals the gap between the inner circumferential surface of the connection hole 4b and the fluid connector 400.

[0212] The elastic bushing 420 is made of an elastically deformable material, for example, rubber.

[0213] The elastic bushing 420 is provided so as to be able to grip the fluid source wall body 4a not only in the thickness direction but also in the surface direction. For this purpose, the elastic bushing 420 can have a connecting portion 422, a locking portion 424, an insertion hole 426, etc.

[0214] The coupling part 422 is formed so that the inner corner 4d and the outer corner 4e of the coupling hole 4b can be simultaneously pressed in the thickness direction and the surface direction of the fluid source wall 4a, respectively. To this end, the coupling part 422 has a length that is longer by a predetermined ratio than the thickness of the fluid source wall 4a or the depth of the coupling hole 4b so that the lower part of the coupling part 422 can penetrate the coupling hole 4b and protrude a predetermined length into the interior of the fluid source 4.

[0215] The shape of the coupling part 422 is not particularly limited. For example, the coupling part 422 may be configured in a cylindrical shape having a diameter that is the same as the diameter of the coupling hole 4b or a diameter that is smaller than the diameter of the coupling hole 4b by a predetermined ratio. In particular, to facilitate insertion of the coupling part 422 into the coupling hole 4b, it is preferable that the outer circumferential surface of the lower part of the coupling part 422 be configured as an inclined surface such that the diameter of the coupling part 422 gradually narrows toward the lower end of the coupling part 422, but this is not limited thereto.

[0216] The locking portion 424 is formed so as to be able to lock onto and adhere closely to the outer surface of the coupling hole peripheral portion 4c while being elastically deformed by the pressure acting when the socket 410 and the clamping nut 440 are screwed together. For example, the locking portion 424 may have a disk shape that extends from the upper end of the coupling portion 422 so as to be concentric with the coupling portion 422 and has a diameter that is larger than the diameter of the coupling hole 4b by a predetermined ratio.

[0217] The insertion hole 426 is formed concentrically with the coupling portion 422 and the locking portion 424 and penetrates the coupling portion 422 and the locking portion 424 in the height direction of the fluid connector 400 .

[0218] The insertion hole 426 may include a first insertion hole 426a, a second insertion hole 426b, a third insertion hole 426c, and so on.

[0219] The first insertion hole 426a is formed to be located at the lower part of the insertion hole 426. More specifically, the first insertion hole 426a is formed to penetrate the lower part of the coupling part 422. The first insertion hole 426a has a diameter that is the same as the diameter of the socket body 411 or is larger than the diameter of the socket body 411 by a predetermined ratio and is smaller than the outer diameter of the first male thread 411a by a predetermined ratio so that the lower end of the socket body 411, which is not formed with the first male thread 411a, can be inserted therein.

[0220] In addition, a bending guide surface 426f is formed on the lower part of the inner circumferential surface of the first insertion hole 426.

[0221] The second insertion hole 426b is located above the first insertion hole 426a and extends from the upper end of the first insertion hole 426a to connect with the first insertion hole 426a. More specifically, the second insertion hole 426b is formed to penetrate the upper part of the coupling portion 422 and the lower part of the locking portion 424. The second insertion hole 426b has a diameter that is the same as or larger than the outer diameter of the first male thread 411a by a predetermined ratio so that the first male thread 411a can be inserted therein. As a result, the second insertion hole 426b and the first insertion hole 426a can be connected to form a stepped structure. In this case, the bottom surface of the second insertion hole 426b can support the lower end of the first male thread 411a. Hereinafter, the bottom surface of the second insertion hole 426b will be referred to as a support surface 426d. The support surface 426d is preferably configured as a downwardly inclined surface such that its height gradually decreases toward the center of the elastic bushing 420. This allows the first male screw thread 411a and the support surface 426d to maintain line contact even if the socket body 411 is slightly inclined.

[0222] The third insertion hole 426c is located above the second insertion hole 426b but extends from the upper end of the second insertion hole 426b to connect with the second insertion hole 426b. More specifically, the third insertion hole 426c is formed to penetrate the upper part of the locking portion 424. The third insertion hole 426c has a diameter larger than that of the second insertion hole 426b by a predetermined ratio. As a result, the third insertion hole 426c and the second insertion hole 426b may be connected to form a stepped structure. In this case, the inner circumferential surface and bottom surface of the third insertion hole 426c may function as an alignment groove 426e that cooperates with an alignment protrusion 433 of a washer 430 (described later) to help the elastic bushing 420 to be uniformly elastically deformed while being aligned in a predetermined manner.

[0223] As described above, by providing the elastic bushing 420, the lower portion of the coupling portion 422, in which the first insertion hole 426a is formed, can elastically deform due to pressure applied when the socket 410 and the locking nut 440 are screwed together, thereby functioning as the inner seal portion 427 that fits tightly against the inner corner 4d of the coupling hole 4b. Therefore, the first insertion hole 426a preferably has a depth equal to or greater than a predetermined reference depth so that the fluid connector 400 can be applied to various types of fluid sources 4 having different thicknesses of the fluid source wall body 4a. In addition, the corner portion connecting the upper portion of the coupling portion 422, in which the second insertion hole 426b is formed, and the locking portion 424 can elastically deform due to pressure applied when the socket 410 and the locking nut 440 are screwed together, thereby functioning as the outer seal portion 428 that fits tightly against the outer corner 4e of the coupling hole 4b. The inner seal portion 427 and the outer seal portion 428 will be described in more detail below.

[0224] FIG. 86 is a front view of the washer, FIG. 87 is a cross-sectional view of the washer, and FIG. 88 is a plan view of the washer.

[0225] The washer 430 is a member for applying pressure to the elastic bushing 420 by switching the pressure applied when the socket 410 and the locking nut 440 are screwed together to a predetermined mode.

[0226] Washer 430 may also be made of plastic or other material having sufficient rigidity to maintain its shape without being deformed by the pressure applied when socket 410 and locking nut 440 are screwed together.

[0227] The washer 430 has a disk shape with a diameter that is larger than the diameter of the coupling hole 4b by a predetermined ratio. The washer 430 may include an insertion hole 431, a guide block 432, an alignment protrusion 433, an outer pressure surface 434, a locking portion pressure surface 435, a fixing protrusion 436, etc.

[0228] The insertion hole 431 is formed through the center of the washer 430 in the height direction of the fluid connector 400 so that the socket body 411 and the first male thread 411a can be movably inserted therein. The insertion hole 431 may include a first insertion hole 431a formed in the lower part of the washer 430 and having a diameter equal to or larger than the outer diameter of the first male thread 411a by a predetermined ratio so that the first male thread 411a can be movably inserted therein, and a second insertion hole 431b formed in the upper part of the washer 430 so that a lower end thereof is connected to an upper end of the first insertion hole 431a and having a diameter larger than the diameter of the first insertion hole 431a by a predetermined ratio. By forming the first insertion hole 431a and the second insertion hole 431b in this manner, the second insertion hole 431b and the first insertion hole 431a are connected to form a staircase structure, and through this, the bottom surface of the second insertion hole 431b can function as a support surface 431c on which the lower end of the tightening nut 440 is placed.

[0229] The guide block 432 protrudes from the inner circumferential surface of the insertion hole 431 toward the center of the insertion hole 431, but is formed to extend long along the height direction of the fluid connector 400. The guide block 432 has a width smaller than that of the guide groove 411b so that it can be inserted into the guide groove 411b of the first male thread 411a and be movable in the height direction of the fluid connector 400.

[0230] The alignment protrusion 433 is formed on the bottom surface of the washer 430 so as to protrude around the first insertion hole 431a so as to be inserted into the alignment groove 426e of the elastic bushing 420 when the fluid connector 400 is installed on the fluid source 4. The alignment protrusion 433 preferably has a ring shape, but is not limited thereto. When the fluid connector 400 is installed on the fluid source 4, the alignment protrusion 433 is inserted into the alignment groove 426e of the elastic bushing 420 in the thickness direction of the fluid source wall 4a (in other words, in the height direction of the fluid source wall 4a) and pressurizes the elastic bushing 420 to align it in a predetermined arrangement, thereby helping the coupling portion 422 and the elastic bushing 420 including the coupling portion 422 to elastically deform in a predetermined manner.

[0231] The outer pressure surface 434 is formed on the bottom surface of the washer 430 along the periphery of the alignment protrusion 433 so as to face the outer corner 4e of the coupling hole 4b across the outer seal portion 428 of the elastic bushing 420 when the fluid connector 400 is installed on the fluid source 4. Although the outer pressure surface 434 has a ring shape, it is configured as an upwardly inclined surface whose height gradually increases from the center to the periphery of the washer 430. The inclination angle of the outer pressure surface 434 is not particularly limited. For example, the inclination angle of the outer pressure surface 434 may be 45°.

[0232] The locking portion pressing surface 435 is formed on the bottom surface of the washer 430 around the outer pressing surface 434 so as to face the locking portion 424 of the elastic bushing 420 when the fluid connector 400 is installed on the fluid source 4. The locking portion pressing surface 435 has an annular disk shape having a depth that is smaller than the thickness of the locking portion 424 by a predetermined ratio. This allows the locking portion pressing surface 435 to press the locking portion 424 of the elastic bushing 420 so as to closely contact the outer surface of the coupling hole surrounding portion 4c.

[0233] The fixing protrusion 436 is formed on the bottom surface of the washer 430 along the periphery of the locking portion pressing surface 435 so as to face the outer surface of a region of the fluid source wall 4a that is positioned a predetermined distance away from the coupling hole 4b compared to the coupling hole periphery 4c when the fluid connector 400 is installed on the fluid source 4. Although the fixing protrusion 436 has a ring shape, it has an inner diameter larger than the outer diameter of the locking portion 424 so that it can pressurize the outer surface of the fluid source wall 4a when the fluid connector 400 is installed on the fluid source 4. As a result, the fixing protrusion 436 is in close contact with the outer surface of the fluid source wall 4a such that frictional force acts between the fixing protrusion 436 and the fluid source wall 4a, thereby fixing the fluid connector 400 so that it does not come off the fluid source 4.

[0234] FIG. 89 is a front view of the clamping nut, FIG. 90 is a cross-sectional view of the clamping nut, and FIG. 91 is a plan view of the clamping nut.

[0235] Next, the clamping nut 440 is a member for connecting the elastic bushing 420 to the connecting hole 4b and also for connecting the fluid guide member to the fluid connector 4.

[0236] The clamping nut 440 preferably has a cylindrical shape that extends along the height direction of the fluid connector 400, but is not limited to this.

[0237] Such a tightening nut 440 may have a connecting hole 442 drilled along the height direction of the fluid connector 400 so that the socket body 411 can be inserted.

[0238] An internal thread 442a is formed on the inner circumferential surface of the connecting hole 442 so as to be threadably engageable with the first external thread 411a of the socket body 411. As a result, when the upper end of the first external thread 411a and the lower end of the internal thread 442a are threadedly engaged, rotating the locking nut 440 in the tightening direction along the first external thread 411a causes the locking nut 440 to descend and the socket 410 to ascend. As a result, by rotating the locking nut 440 in the tightening direction along the first external thread 411a, the locking nut 440 can be gradually engaged with the socket 410 so that the socket body 411 is gradually inserted into the connecting hole 442.

[0239] Furthermore, when the first male thread 411a and the female thread 442a are threadedly engaged, rotating the locking nut 440 along the first male thread 411a in the loosening direction, which is opposite to the locking direction, causes the locking nut 440 to rise and the socket 410 to fall. Thus, by rotating the locking nut 440 along the first male thread 411a in the loosening direction, the locking nut 440 can be gradually separated from the socket 410 so that the socket body 411 is gradually pulled out of the connecting hole 442.

[0240] 92 to 95 are diagrams for explaining a method for installing the fluid connector on the fluid source, and FIG. 96 is a diagram for explaining the principle by which the elastic bushing grips the wall of the fluid source.

[0241] As described above, the fluid source 4 and the fluid guide member can have various structures depending on the intended use. In the following description, the fluid source 4 is configured as a water tank in which water is stored, and the fluid guide member is configured as the branch pipe described above. 2 A method for connecting the fluid source 4 and the fluid guide member using the fluid connector 400 will be described below using the case where the fluid connector 400 is configured as follows:

[0242] First, a connecting hole 4b is drilled in the fluid source wall 4a using a drilling member.

[0243] Next, the socket body 411 and the first male thread 411a are inserted into the insertion hole 426 so that the lower end of the first male thread 411a of the socket 410 is supported by the support surface 426d of the elastic bushing 420, thereby joining the socket 410 and the elastic bushing 420.

[0244] Thereafter, the socket body 411 is inserted into the insertion hole 431 of the washer 430 under the guidance of the guide groove 411b and the guide block 432 so that the washer 430 is positioned above the elastic bushing 420, and the socket 410 and the washer 430 are coupled together.

[0245] Next, with the upper end of the first male thread 411a of the socket body 411 placed on the lower end of the female thread 442a of the clamping nut 440, the clamping nut 440 is rotated along the first male thread 411a in a predetermined tightening direction to tighten, thereby temporarily joining the socket 410 and the clamping nut 440 so that the clamping nut 440 is positioned above the washer 430 but is separated from the socket head 413 by a predetermined marginal distance.

[0246] When the locking nut 440 is rotated along the first male thread 411a to tighten it while the upper end of the first male thread 411a is positioned on the lower end of the female thread 442a, the socket 410 rises and the locking nut 440 descends, gradually reducing the gap between the socket head 413 and the locking nut 440. As a result, the socket body 411 is gradually inserted into the connecting hole 442 of the locking nut 440 through the lower opening of the connecting hole 442, gradually reducing the gap between the socket head 413, the elastic bushing 420, the washer 430, and the locking nut 440. Therefore, when the locking nut 440 is tightened so that the socket head 413, the elastic bushing 420, the washer 430, and the locking nut 440 are in close contact with each other, further tightening the locking nut 440 causes the socket head 413 to press the elastic bushing 420 in the positive thickness direction, and the locking nut 440 to press the washer 430 in the negative thickness direction. In addition, the washer 430 presses the elastic bushing 420 in the thickness direction through the pressure applied from the clamping nut 440. Then, the elastic bushing 420 is pressed in both the up and down directions by the socket head 413 and the washer 430, and can be elastically deformed.

[0247] However, if the coupling portion 422 of the elastic bushing 420 is elastically deformed before being inserted into the fluid source 4 through the coupling hole 4b, the fluid source wall body 4a cannot be gripped using the elastic bushing 420. Therefore, in order to prevent the elastic bushing 420 from elastically deforming and maintain its original shape, the socket 410 and the clamping nut 440 are temporarily coupled together by tightening the clamping nut 440 only until the separation distance between the socket head 413 and the clamping nut 440 reaches a predetermined margin distance.

[0248] Then, the lower part of the socket 410 including the portion from the socket head 413 to the lower part of the first male thread 411a and the coupling portion 422 of the elastic bushing 420 are selectively inserted into the coupling hole 4b so that the engaging portion 424 of the elastic bushing 420 is engaged with the outer surface of the coupling hole surrounding portion 4c, the outer seal portion 428 of the elastic bushing 420 faces the outer corner 4e of the coupling hole 4b, and the socket head 413 and the inner seal portion 427 of the elastic bushing 420 protrude into the inside of the fluid source 4.

[0249] Next, the clamping nut 440 is rotated in the tightening direction along the first male thread 411a of the socket 410 to tighten it so that the pressure applied from the clamping nut 440 and the socket 410 causes the elastic bushing 420 to elastically deform into a shape that can grip the fluid source wall body 4a, thereby finally connecting the socket 410 and the clamping nut 440.

[0250] The final connection between the socket 410 and the locking nut 440 can be achieved by first tightening the locking nut 440 so that the socket head 413, the elastic bushing 420, the washer 430, and the locking nut 440 are in close contact with one another, and then secondarily tightening the locking nut 440 until the elastic bushing 420 is compressed in both directions (positive thickness direction and negative thickness direction) by the socket head 413 and the washer 430 and elastically deforms into a predetermined shape.

[0251] More specifically, when the socket 410 and the tightening nut 440 are finally joined, the alignment protrusion 433 of the washer 430 is inserted into the alignment groove 426e of the elastic bushing 420 and then presses the elastic bushing 420 in the thickness direction of the fluid source wall 4a, thereby aligning the elastic bushing 420 in a predetermined arrangement, the locking portion pressure surface 435 of the washer 430 presses the locking portion 424 in the thickness direction of the fluid source wall 4a to tightly contact the outer surface of the connecting hole surrounding portion 4c, and the fixing protrusion 436 of the washer 430 presses the outer surface of the fluid source wall 4a to fix the fluid connector 400 to the fluid source 4.

[0252] Furthermore, the outer pressing surface 434 of the washer 430 presses the outer seal portion 428 of the elastic bushing 420 in the negative thickness direction and the surface direction of the fluid source wall body 4a simultaneously through the aforementioned inclined structure. The outer seal portion 428 can then press the outer corner 4e in the negative thickness direction and the surface direction simultaneously while elastically deforming to fit the shape of the outer corner 4e. Correspondingly, the inner pressing surface 413a of the socket head 413 presses the inner seal portion 427 of the elastic bushing 420 in the positive thickness direction and the surface direction of the fluid source wall body 4a through the aforementioned inclined structure. The inner seal portion 427 can then press the inner corner 4d in the positive thickness direction and the surface direction simultaneously while elastically deforming to fit the shape of the inner corner 4d.

[0253] As a result of the elastic deformation of the elastic bushing 420, the elastic bushing 420 can simultaneously grip and fix the inner corner 4d and the outer corner 4e of the coupling hole 4b in the thickness direction and the surface direction of the fluid source wall 4a, and through this, the elastic bushing 420 and the fluid connector 400 including the same can be coupled to the fluid source 4.

[0254] The fluid guide member is then coupled to the clamping nut 440 .

[0255] For example, the fluid source 4 is configured as a water tank, and the fluid guide member is a branch pipe. 2 If it consists of Branch piping 2 The second male thread 2c is screwed into the female thread 442a of the connecting hole 442 of the clamping nut 440, Water tank and branch piping 2 can be connected using a fluid connector 400.

[0256] Branch piping like this 2 When the water tank and branch pipe are connected to the tightening nut 440, 2 are connected through the outlet hole 415 of the socket 410. Through this, the water discharged from the water tank is passed through the outlet hole 415 of the socket 410 to the branch pipe. 2 is transmitted to the branch pipe 2 can transport water delivered from the water tank to the demand destination.

[0257] The above-mentioned fluid connector 400 is configured so that the inner corner 4d and outer corner 4e of the connecting hole 4b drilled in the fluid source 4 are maintained in contact with the inner seal portion 427 and outer seal portion 428 of the elastic bushing 420 over the entire area of ​​the connecting hole 4b, and so that the inner seal portion 427 and outer seal portion 428 can simultaneously pressurize the inner corner 4d and outer corner 4e in the thickness direction and surface direction of the fluid source wall body 4a.

[0258] As a result, the fluid connector 400 can simultaneously hold the inner corner 4d and the outer corner 4e of the coupling hole 4b in the thickness direction and the surface direction via the elastic bushing 420. That is, the fluid connector 400 holds the fluid source wall 4a not only in the thickness direction but also in the surface direction, which is the direction in which the fluid source wall 4a expands due to high fluid pressure, via the elastic bushing 420. This fluid connector 400 can prevent the elastic bushing 420 and the fluid connector 400 including the same from coming off the coupling hole 4b, and can prevent play from occurring between the outer peripheral surface of the elastic bushing 420 and the inner peripheral surface of the coupling hole 4b, which could allow fluid to leak out.

[0259] Generally, the thickness of the fluid source wall 4a is significantly smaller than the area, so the rigidity of the fluid source wall in the planar direction is greater than the rigidity in the thickness direction. Conventional fluid connectors are designed to be installed by applying an external force to the fluid source wall only in the thickness direction. Therefore, during installation and use of conventional fluid connectors, the fluid source wall is often deformed or damaged by the external force applied to the fluid source wall by the fluid connector.

[0260] In contrast, the fluid connector 400 is configured to be installed by distributing the pressure transmitted from the socket 410 and the clamping nut 440 in the thickness direction and surface direction of the fluid source wall 4a and applying it to the inner corner 4d and outer corner 4e of the coupling hole 4b. As a result, the fluid connector 400 can prevent the fluid source wall 4a from being deformed or damaged by the external force applied to the fluid source wall 4a by the fluid connector 400 during installation and use of the fluid connector 400.

[0261] Furthermore, the fluid connector 400 is configured so that the elastic bushing 420 can press and grip the fluid source wall 4a in both the inner and outer directions when the locking nut 440 is tightened outside the fluid source 4. This eliminates the need to use tools on both the inner and outer sides of the fluid source 4 to operate the fluid connector 400, and provides the convenience of being able to install or retrieve the fluid connector 400 by operating the fluid connector 400 only on the outer side of the fluid source 4 using tools.

[0262] Figure 97 is a diagram showing the fluid connector of the fifth embodiment of the present invention when separated from the fluid source, Figure 98 is a diagram showing the fluid connector shown in Figure 97 when connected to the fluid source, and Figures 99 and 100 are diagrams for explaining a method of drilling a connection hole in the fluid source wall.

[0263] 97 and 98, a fluid connector 500 according to a fifth embodiment of the present invention is a device for connecting a fluid source 5 to the above-described fluid guide member, and may include a socket 510, a washer 520, a locking nut 530, etc. Such a fluid connector 500 has a structure in which some components are modified so that it can be installed on the fluid source 5 in a different manner from the above-described fluid connector 400. Hereinafter, descriptions of components that are included in the fluid connectors 100, 200, 300, 400, and 500 in common will be omitted or will be mentioned briefly.

[0264] The fluid connector 500 is similar to the fluid connector of the present invention in that the structure is modified so that the fluid connector 500 can be installed by forming wings 5d on the fluid source wall 5a made of an elastic material such as PVC or rubber, and then fixing the wings 5d using a socket 510 and a washer 520. 4 There are differences from the fluid connector 400 according to the embodiment.

[0265] In particular, the fluid connector 500 is preferably applied to a fluid source 5 having a structure in which woven knitting yarn is embedded in the fluid source wall 5a to prevent tearing or ripping of the fluid source wall 5a, but is not limited to this.

[0266] The following will discuss the differences of the present invention. 5 The fluid connector 500 according to the embodiment will be mainly described, and the present invention will be explained. 4 Fluid connector according to an embodiment 400 and the present invention 5 The description of the components that are included in the fluid connector 500 according to the embodiment will be omitted or will be mentioned briefly.

[0267] The fluid connector 500 is connectable to a connecting hole 5b drilled in the fluid source wall 5a so as to communicate the inside and outside of the fluid source 5. Therefore, in order to install the fluid connector 500, a work of drilling a connecting hole 5b for connecting the fluid connector 500 in the fluid source wall 5a using a punch or other drilling device must first be performed. The connecting hole 5b is preferably drilled in the thickness direction of the fluid source wall 5a, but is not limited to this. Furthermore, the connecting hole 5b is preferably circular, but is not limited to this. Furthermore, the connecting hole 5b is preferably formed in a region of the fluid source wall 5a having a planar structure, but is not limited to this.

[0268] In the following, the fluid connector 500 will be described based on the case where the circular coupling hole 5b is drilled in the thickness direction of the fluid source wall body 5a. In addition, the surrounding area surrounding the coupling hole 5b in the entire area of ​​the fluid source wall body 5a will be named the coupling hole surrounding area 5c.

[0269] 101 is a front view of the socket, FIG. 102 is a plan view of the socket, and FIG. 103 is a view showing the state in which an inner pressure surface is formed on the socket head.

[0270] The socket 510 is a member for sequentially connecting the fluid source 5, the fluid connector 500, and the fluid guide member.

[0271] Such a socket 510 may include a socket body 511, a socket head 513, a discharge hole 515, a hook 517, an O-ring 519, and the like.

[0272] The socket body 511 has a cylindrical shape that extends elongated along the height direction of the fluid connector 500. In addition, the socket body 511 preferably has a diameter that is larger than the diameter of the coupling hole 5b by a predetermined ratio, but is not limited to this.

[0273] The socket body 511 has a first external thread 511a protruding from its outer circumferential surface. The first external thread 511a has an outer diameter that is larger than the diameter of the socket body 511 by a predetermined ratio. In particular, the first external thread 511a is preferably formed at a predetermined clearance from each of the upper and lower ends of the socket body 511. Here, the lower end of the socket body 511 refers to an end of both side ends of the socket body 511 where a socket head 513 (described below) is formed, and the upper end of the socket body 511 refers to an end of both side ends of the socket body 511 opposite the lower end.

[0274] A guide groove 511b, into which a guide block 524 of a washer 520 (described later) is movably inserted, is recessed into the first male thread 511a along the height direction of the fluid connector 500. A detailed description of the guide groove 511b will be given later together with a description of the guide block 524.

[0275] The socket head 513 is formed at the lower end of the socket body 511 so as to be concentric with the socket body 511. The socket head 513 has a diameter that is larger than the outer diameter of the first male thread 511a by a predetermined ratio. Then, the following relationship is established among the coupling hole 5b, the socket body 511, the first male thread 511a, and the socket head 513.

[0276] Diameter of socket head 513 > outer diameter of first male screw thread 511a > diameter of socket body 511 > diameter of coupling hole 5b

[0277] An insertion guide surface 513a is formed on the side of the socket head 513 to guide the insertion of the socket head 513 so that the socket head 513 can be easily inserted into the coupling hole 5b. It is preferable that the insertion guide surface 513a has an inclined structure such that the diameter of the socket head 513 gradually decreases toward the lower end of the socket head 513, but this is not limitative.

[0278] The upper surface of the socket head 513 is formed with an inner pressing surface 513b that slopes downward so that its height gradually decreases from the center of the socket 510 to the outer periphery. An O-ring groove 513c into which an O-ring 519 can be fitted is recessed and formed in the inner pressing surface 513b. In particular, the O-ring groove 513c is preferably formed in the middle of the inner pressing surface 513b so as to be spaced a predetermined distance from the upper and lower ends of the inner pressing surface 513b. In this case, the inner pressing surface 513b may be divided into a lower portion extending from the upper end of the periphery of the socket head 513, a middle portion where the O-ring groove 513c is formed, and an upper portion extending from the lower end of the socket body 511. For ease of explanation, the lower portion of the inner pressing surface 513b will be referred to as a first inner pressing surface 513d, and the upper portion of the inner pressing surface 513b will be referred to as a second inner pressing surface 513e.

[0279] Moreover, it is preferable that the second inner pressure surface 513e has an inclination angle that is larger than the inclination angle of the first inner pressure surface 513d by a predetermined ratio.

[0280] In addition, it is preferable that the diameter of the upper end of the second inner pressure surface 513e is larger than the diameter of the socket body 511 by a predetermined ratio. In this case, a step surface is formed between the upper end of the second inner pressure surface 513e and the lower end of the socket body 511, connecting the upper end of the second inner pressure surface 513e and the lower end of the socket body 511 to form a staircase structure. This step surface can function to invert the wing portion 5d of the fluid source wall body 5a, which is formed toward the inside of the fluid source 5, toward the positive height direction of the fluid connector 500 or toward the outside of the fluid source 5, and hereinafter, the step surface will be referred to as an inverted step 513f.

[0281] The discharge hole 515 is drilled inside the socket 510 so as to penetrate the socket head 513 and the socket body 511 in the height direction of the fluid connector 500 .

[0282] The hooks 517 are formed on the insertion guide surface 513a to protrude in the radial direction of the socket head 513. It is preferable that the hooks 517 are formed so that they can be spaced a predetermined distance from the inner surface of the fluid source wall 5a when the socket head 513 is inserted into the fluid source 5 through the coupling hole 5b.

[0283] The O-ring 519 is made of elastically deformable rubber or other elastic material and is fitted into the O-ring groove 513c. The O-ring 519 preferably has a thickness that is greater than the depth of the O-ring groove 513c by a predetermined ratio. When the O-ring 519 is fitted into the O-ring groove 513c, the O-ring 519 can protrude a predetermined height higher than the first inner pressure surface 513d and the second inner pressure surface 513e.

[0284] FIG. 104 is a front view of the washer, FIG. 105 is a cross-sectional view of the washer, and FIG. 106 is a plan view of the washer.

[0285] Next, the washer 520 is a member that works in conjunction with the socket head 513 to fix the wing portion 5d of the fluid source wall body 5a in a predetermined manner.

[0286] Washer 520 may be made of plastic or other material having sufficient rigidity to maintain its shape without deformation due to the pressure applied when socket 510 and locking nut 530 are screwed together.

[0287] As described above, the socket body 511, the first male thread 511a, and the socket head 513 have a diameter larger than that of the coupling hole 5b. To install the fluid connector 500, the lower part of the socket 510, including the portion from the lower part of the socket head 513 to the lower part of the first male thread 511a, must be inserted into the fluid source 5 through the coupling hole 5b. In order to insert the lower part of the socket 510 into the fluid source 5 through the coupling hole 5b, the coupling hole peripheral part 5c, which corresponds to the area surrounding the coupling hole 5b over the entire area of ​​the fluid source wall 5a, must be pressed toward the inside of the fluid source 5 using the socket head 513 so that the diameter of the coupling hole 5b expands as the coupling hole peripheral part 5c elastically deforms. As a result, during the process of inserting the lower part of the socket 510 into the fluid source 5 through the coupling hole 5b, the coupling hole surrounding part 5c gradually bends toward the inside of the fluid source 5 due to the pressure applied from the socket head 513 and the first male screw thread 511a, forming wing-shaped wings 5d. That is, cylindrical wings 5d are formed on the ring-shaped coupling hole surrounding part 5c surrounding the coupling hole 5b. Then, the coupling hole 5b is positioned inside the wings 5d in an expanded state so that its diameter is the same as the inner diameter of the wings 5d.

[0288] As described above, by forming the wing portions 5d on the peripheral portion 5c of the coupling hole, the coupling hole 5b is expanded to its maximum so as to have a diameter corresponding to the diameter of the socket head 513 when the socket head 513 passes through the coupling hole 5b, contracted to have a diameter corresponding to the diameter of the socket body 511 when the lower end of the socket body 511 passes through the coupling hole 5b, and expanded again to have a diameter equal to the outer diameter of the first male thread 511a when the first male thread 511a passes through the coupling hole 5b.

[0289] When the socket 510 and the clamping nut 530 are screwed together, the washer 520 distributes the pressure applied from the clamping nut 530 in the thickness direction and the surface direction of the fluid source wall body 5a and applies it to the wing portion 5d, thereby enabling the wing portion 5d to be fixed in the thickness direction and the surface direction.

[0290] The washer 520 has a disk shape with a diameter that is larger than the diameter of the coupling hole 5b by a predetermined ratio. The washer 520 may include an insertion hole 522, a guide block 524, and the like.

[0291] The insertion hole 522 is formed through the center of the washer 520 in the height direction of the fluid connector 500 so that the first male screw thread 511a and the wing portion 5d formed to fit closely to the first male screw thread 511a can be inserted therein. The insertion hole 522 may include a first insertion hole 522a formed in the lower part of the washer 520, a second insertion hole 522b formed in the middle part of the washer 520 so that its lower end communicates with the upper end of the first insertion hole 522a, and a third insertion hole 522c formed in the upper part of the washer 520 so that its lower end communicates with the upper end of the second insertion hole 522b.

[0292] Additionally, an outer pressure surface 522d is formed on the inner peripheral surface of the first insertion hole 522a, and is inclined so that the diameter of the first insertion hole 522a gradually increases toward the lower end of the first insertion hole 522a. The outer pressure surface 522d preferably has an inclination angle corresponding to the inclination angle of the inner pressure surface 513b so that the wing portions 5d are interposed between the outer pressure surface 522d and the inner pressure surface 513b of the socket head 513 when the fluid connector 500 is installed.

[0293] In addition, it is preferable that the outer pressure surface 522d is formed so that the lower end of the first insertion hole 522a, which has the largest diameter, has a diameter that is the same as or larger than the diameter of the socket head 513, and the upper end of the first insertion hole 522a, which has the smallest diameter, has a diameter that is larger than the outer diameter of the first male thread 511a and smaller than the diameter of the socket head 513.

[0294] The outer pressure application surface 522d may have a fixing protrusion 522e formed to protrude and face the inner pressure application surface 513b of the socket head 513 when the fluid connector 500 is installed. The fixing protrusion 522e preferably has a ring shape, but is not limited thereto. The fixing protrusion 522e is preferably formed to face the O-ring 519 across the wing portion 5d when the fluid connector 500 is installed, but is not limited thereto.

[0295] Furthermore, it is preferable, but not limited to, that the lower and upper corners of the outer pressure applying surface 522d are rounded to prevent the wing portions 5d of the fluid source 5 from being suddenly bent and damaged by the outer pressure applying surface 522d. Here, the lower corner of the outer pressure applying surface 522d refers to the corner where the outer pressure applying surface 522d meets the bottom surface of the washer 520, and the upper corner of the outer pressure applying surface 522d refers to the corner where the outer pressure applying surface 522d meets the inner circumferential surface of the second insertion hole 522b.

[0296] The second insertion hole 522b is formed to have the same diameter as the diameter of the upper end of the first insertion hole 522a, and the third insertion hole 522c is formed to have a diameter that is larger than the diameter of the second insertion hole 522b by a predetermined ratio. The second insertion hole 522b and the third insertion hole 522c are connected to form a stepped structure, through which the lower end of the locking nut 530 can be placed on the bottom surface of the third insertion hole 522c. Therefore, hereinafter, the bottom surface of the third insertion hole 522c will be referred to as the placement surface 522f.

[0297] The guide block 524 protrudes from the inner circumferential surface of the insertion hole 522 toward the center of the insertion hole 522, but is formed to extend long along the height direction of the fluid connector 500. The guide block 524 has a width smaller than that of the guide groove 511b so that the guide block 524 can be inserted into the guide groove 511b of the first male thread 511a and be movable in the height direction of the fluid connector 500.

[0298] On the other hand, the clamping nut 530 is the same as that of the present invention described above. 4The clamping nut 530 has the same structure as the clamping nut 440 of the fluid connector 400 according to the embodiment, so a detailed description of the clamping nut 530 will be omitted.

[0299] Figures 107 to 113 are diagrams for explaining how to install the fluid connector on the fluid source, and Figure 114 is a diagram for explaining the principle by which the socket body and washer grip the fluid source wall.

[0300] First, a connecting hole 5b is drilled in the fluid source wall 5a using a drilling member.

[0301] Next, the socket body 511 is inserted into the insertion hole 522 of the washer 520 under the guidance of the guide groove 511b and the guide block 524, and the socket 510 and the washer 520 are joined together.

[0302] Thereafter, with the upper end of the first male thread 511a of the socket body 511 placed on the lower end of the female thread of the clamping nut 530, the clamping nut 530 is rotated along the first male thread 511a in a predetermined tightening direction to tighten, thereby temporarily joining the socket 510 and the clamping nut 530 so that the clamping nut 530 is positioned above the washer 520 but is separated from the socket head 513 by a predetermined marginal distance.

[0303] When the socket 510 and the clamping nut 530 are temporarily joined, the clearance between the clamping nut 530 and the socket head 513 is determined so that the distance between the lower end of the clamping nut 530 and the lower end of the first male thread 511a is larger than the height of the washer 520 by a predetermined ratio.

[0304] Next, the fluid connector 500 is tilted at a predetermined angle so that the hook 517 faces the connecting hole 5b, and then the hook 517 is inserted into the inside of the fluid source 5 through the connecting hole 5b so that it engages with the inner surface of the connecting hole surrounding portion 5c.

[0305] Then, with the hook 517 engaged with the inner surface of the coupling hole surrounding portion 5c, the socket head 513 is pressed against the inside of the fluid source 5 so that the coupling hole surrounding portion 5c is elastically deformed by the principle of leverage, expanding the coupling hole 5b, and the lower portion of the socket 510, including from the socket head 513 to the lower portion of the first male thread 511a, is inserted into the inside of the fluid source 5 through the expanded coupling hole 5b, and at the same time, a wing portion 5d having a cylindrical shape that surrounds the expanded coupling hole 5b is formed on the coupling hole surrounding portion 5c.

[0306] Next, with the wing portion 5d turned upside down, the clamping nut 530 is rotated in the clamping direction along the first male thread 511a so that it is interposed between the outer pressure surface 522d of the washer 520 and the inner pressure surface 513b of the socket head 513, thereby finally connecting the socket 510 and the clamping nut 530.

[0307] The final connection between the socket 510 and the clamping nut 530 can be achieved by first tightening the clamping nut 530 so that the wing portion 5d is bent and turned upside down toward the outside of the fluid source 5 by the socket 510 rising toward the outside of the fluid source 5, and then secondarily tightening the clamping nut 530 until the turned-upside-down wing portion 5d is interposed between the outer pressure surface 522d of the washer 520 and the inner pressure surface 513b of the socket head 513.

[0308] When the wing portion 5d is formed toward the inside of the fluid source 5 and the clamping nut 530 is tightened initially, the wing portion 5d can bend toward the outside of the fluid source 5 and bend upside down so as to protrude outside the fluid source 5 due to frictional forces applied from the first male thread 511a of the socket body 511, which rises toward the outside of the fluid source 5, the inversion step 513f of the socket head 513, and other external forces.

[0309] When the clamping nut 530 is secondarily tightened with the wing 5d upside down, the wing 5d is interposed between the outer pressure surface 522d and the inner pressure surface 513b. This secondary tightening of the clamping nut 530 is preferably performed until the upper portion of the wing 5d passes through the space between the outer pressure surface 522d and the inner pressure surface 513b and enters the space between the lower end of the socket body 511 and the inner circumferential surface of the second insertion hole 522b. Then, the upper portion of the wing 5d bends based on the upper corner of the outer pressure surface 522d, and the lower portion of the wing 5d bends based on the lower corner of the outer pressure surface 522d. By bending the wing 5d in two stages in this way, a two-stage sealing structure using the wing 5d can be formed.

[0310] When the wing 5d is interposed between the inner pressurizing surface 513b and the outer pressurizing surface 522d in a bent state according to the inclination angle of the inner pressurizing surface 513b and the outer pressurizing surface 522d, the socket head 513 and the washer 520 can simultaneously grip and fix the wing 5d in the thickness direction and the surface direction of the fluid source wall body 5a. As a result, the socket head 513, the washer 520, and the fluid connector 500 including them can be connected to the fluid source 5. In addition, the fixing protrusion 522e can press the lower part of the wing 5d to further firmly fix the wing 5d, and the O-ring 519 can tightly seal the gap between the socket head 513 and the wing 5d by closely contacting the inner circumferential surface of the lower part of the wing 5d.

[0311] Next, the branch pipe 2 a is connected to the clamp nut 530 .

[0312] The method of connecting the fluid guide member and the clamping nut 530 is the same as that of the present invention. 4 Since this is the same as the content disclosed when describing the fluid connector 400 according to the embodiment, a detailed description thereof will be omitted.

[0313] As described above, the fluid connector 500 has the coupling hole peripheral portion 5c, which corresponds to the peripheral region surrounding the coupling hole 5b over the entire region of the fluid source wall 5a, protruding outward from the fluid source 5 by a predetermined height to form the wings 5d, and then the wings 5d are gripped and fixed not only in the thickness direction of the fluid source wall 5a but also in the planar direction, which is the direction in which the fluid source wall 5a expands due to the high pressure of the fluid, using the washer 520 and the socket head 513. This prevents the fluid connector 500 from coming off the coupling hole 5b or from having play that could allow fluid to leak between the fluid connector 500 and the inner surface of the coupling hole 5b.

[0314] In addition, the fluid connector 500 is installed by fixing the wing portion 5d, which protrudes a predetermined height from the outside of the fluid source 5, to the fluid connector 500, so that it can be stably connected to the fluid source 5 even if the connecting hole 5b of the fluid source 5 has an elliptical or other uneven shape.

[0315] In addition, since the fluid connector 500 is installed so that the socket 510 passes through the connecting hole 5b that is expanded during the process of forming the wing portion 5d, the diameter of the socket 510 and the diameter of the discharge hole 515 formed in the socket 510 can be expanded compared to conventional fluid connectors in which the socket 510 is configured to have the same diameter as the connecting hole 5b.

[0316] Furthermore, the fluid connector 500 is provided such that when the tightening nut 530 is tightened outside the fluid source 5, the socket 510 and the washer 520 can pressurize and grip the wing portion 5d of the fluid source wall 5a from both the inside and outside of the fluid source 5. This provides the convenience of being able to install or retrieve the fluid connector 500 by operating the fluid connector 500 only using a tool on the outside of the fluid source 5, without having to operate the fluid connector 500 using a tool on both the inside and outside of the fluid source 5.

[0317] The above description is merely an illustrative example of the technical concept of the present invention, and various modifications and variations may be made by a person having ordinary knowledge in the technical field to which the present invention pertains without departing from the essential characteristics of the present invention.

[0318] Therefore, the embodiments disclosed in the present invention are for illustrative purposes only and are not intended to limit the technical idea of ​​the present invention. The scope of the technical idea of ​​the present invention should be interpreted by the appended claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims

1. A fluid connector that is connected to a connection hole drilled in a main pipe, a socket body, the lower end of which is located inside the main pipe and the upper end of which is located outside the main pipe; a first section which is a partial section of the socket body; a socket body, the socket body being inserted into the coupling hole; a socket head extending from a lower end of the socket body and inserted into the coupling hole along the lower end of the socket body so as to be positioned inside the main pipe; a socket comprising: a coupling portion that is inserted into the coupling hole so as to be positioned inside the main pipe with a lower end of the coupling portion placed on an upper surface of the socket head; a locking portion extending from an upper end of the coupling portion and locking to an outer surface of the main pipe; The upper end of the socket body passes through the coupling portion and the locking portion. a second section that is a section of the socket body and is different from the first section; an insertion hole into which the a resilient bushing comprising: a washer body, the lower surface of which is placed on the upper surface of the locking portion; The upper end of the socket body passes through the washer body. a third section that is a partial section of the socket body and is different from the first section and the second section; an insertion hole into which the a washer comprising: A clamping nut, The lower surface of the clamping nut is placed on the upper surface of the washer body, The washer is tightened and screwed to the upper end of the socket body that has passed through the insertion hole, and the pressure caused by the tightening and screwing is applied to the elastic bushing through the socket head and the washer body. Both directions including a +thickness direction of the main pipe toward the outside of the main pipe and a -thickness direction of the main pipe toward the inside of the main pipe, to elastically deform the elastic bushing in a predetermined manner. A clamping nut; Including, The socket head is the connecting portion is disposed between the inner circumferential surface of the connecting hole and the inner surface of the main pipe, and the connecting portion faces an inner corner of the connecting hole that connects the inner circumferential surface of the connecting hole and the inner surface of the main pipe, in a state inclined with respect to the +thickness direction of the main pipe and the −thickness direction of the main pipe; a downwardly inclined surface formed on a certain section of the upper surface of the socket head where the lower end of the coupling portion is placed, the downwardly inclined surface gradually decreasing in height as it becomes farther from the central axis of the socket; the coupling portion applies pressure to the inner corner in the positive thickness direction of the main pipe, and at the same time, applies pressure in at least one direction of the length direction of the main pipe perpendicular to the positive thickness direction and the circumferential direction, thereby elastically deforming the coupling portion along the downward inclined surface using the pressure. inner pressure surface, and The washer body is the connecting portion faces an outer corner of the connecting hole that connects an inner circumferential surface of the connecting hole and an outer surface of the main pipe, with the engaging portion interposed therebetween, in a state inclined with respect to the +thickness direction of the main pipe and the −thickness direction of the main pipe; The upper surface of the locking portion is formed in a certain section of the lower surface of the washer body on which the locking portion is placed, so as to form an upwardly inclined surface whose height gradually increases as the distance from the central axis of the washer increases, The locking portion applies pressure to the outer corner in the thickness direction of the main pipe, and at the same time, the locking portion applies pressure in at least one direction of the length direction of the main pipe perpendicular to the thickness direction and the circumferential direction, thereby elastically deforming the locking portion along the upward inclined surface. outer pressure surface, and the inner pressure surface is formed such that the downward inclined surface has different inclination angles depending on the portions thereof in response to the difference in angle depending on the portions of the inner corner due to the curvature of the main pipe, so that the pressure is evenly distributed to the entire area of ​​the inner corner through the coupling portion; The outer pressure surface is formed such that the upward inclined surface has different inclination angles depending on the portion thereof in response to the difference in angle depending on the portion of the outer corner due to the curvature of the main pipe, so that the pressure is evenly distributed over the entire area of ​​the outer corner through the locking portion. Fluid connector.

2. The socket body has a first male thread formed on the outer peripheral surface of the socket body. The fluid connector of claim 1 .

3. The elastic bushing is a bending guide surface formed on an inner peripheral surface of the insertion hole of the elastic bushing so that, when the socket body and the clamping nut are tightened and screwed together, the lower end of the coupling portion slides along the inner pressure surface in the negative thickness direction of the main pipe, and simultaneously slides in at least one of the longitudinal direction and the circumferential direction of the main pipe, while the coupling portion is bent along the inner pressure surface; further comprising The fluid connector of claim 1 .

4. the bending guide surface is formed to be inclined such that the diameter of the insertion hole of the elastic bushing gradually increases toward the lower end of the insertion hole of the elastic bushing. The fluid connector of claim 3 .

5. The locking portion has an alignment groove formed to open toward the lower surface of the washer body, The washer body is an alignment protrusion formed on the lower surface of the washer body to be inserted into the alignment groove when the socket body and the clamping nut are tightened together; Furthermore, The outer pressing surface is formed to be located on the outer periphery side of the washer compared to the alignment protrusion. The fluid connector of claim 1 .

6. The washer is a flange extending from the lower end of the washer body to have a disk shape; Furthermore, The flange is a bending guide surface formed on the lower surface of the flange so as to be positioned closer to the outer periphery of the washer than the outer pressure surface, and bending the locking portion so as to closely contact the outer surface of the main pipe; Equipped with The fluid connector of claim 1 .

7. The flange is a fixing protrusion formed on the lower surface of the flange so as to be positioned closer to the outer periphery of the washer than the bending guide surface, and formed so as to come into close contact with the outer surface of the main pipe by the pressure when the socket body and the clamping nut are tightened and screwed together; Further provided with The fluid connector of claim 6.

8. The clamping nut is a first coupling hole formed so that the upper end of the socket body passing through the insertion hole of the washer can be inserted therein; a first female thread formed on an inner circumferential surface of the first coupling hole so as to be threadably engaged with the first male thread; Further provided with The fluid connector of claim 2 .

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