Fluid connector

Abstract

The present invention relates to a fluid connector coupled to a coupling hole formed through a main pipe, the fluid connector comprising: an insert at least partially inserted into the coupling hole; an elastic bush movably attached to the insert such that at least a portion of the elastic bush is inserted into the coupling hole together with the insert; a gasket which is movably attached to the insert and which is provided outside the main pipe in a state facing the elastic bush; and a locknut which is screwed to the insert so as to be provided outside the main pipe in a state facing the gasket, the elastic bush being elastically deformed by pressure transmitted through the insert and the gasket when the locknut is screwed to the insert, and the elastic bush being elastically deformed by pressure transmitted through the gasket and the insert when the locknut is screwed to the insert. The pressure can be applied in the longitudinal direction and / or the circumferential direction of the main pipe while applying pressure in the height direction of the main pipe to the inside corner at the lower end of the inner peripheral surface of the coupling hole and the outside corner at the upper end of the inner peripheral surface of the coupling hole, and the pressure can be applied in the longitudinal direction and / or the circumferential direction of the main pipe.

Description

Technical Field

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

[0002] The pipe is a member for supplying water or other fluid (hereinafter referred to as water) supplied from a supply source to a demand point.

[0003] However, in some cases, for example, when the water supply path is complex or there are multiple demand points, branching of the supply path is required. For this reason, a fluid connector for connecting the main pipe and the branch pipe is being developed and used.

[0004] After the head of a plug-in (hereinafter referred to as the plug-in head) provided on the fluid connector is inserted into the coupling hole formed through the hole in the main pipe in order to couple the branch pipe, the existing fluid connector can utilize threaded fastening or other coupling methods to apply pressure to the plug-in head and the surrounding portion of the coupling hole in the thickness direction of the main pipe to couple the plug-in with the coupling hole, thereby causing the inner circumferential surface of the surrounding portion of the coupling hole surrounding the coupling hole to fit tightly against the plug-in head.

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

[0006] However, the conventional fluid connector applies pressure to the plug head and the peripheral part of the coupling hole only in the thickness direction to couple the plug with the main pipe, and therefore has the disadvantage that it is difficult to fix the peripheral part of the coupling hole that expands along the circumferential direction and the longitudinal direction due to water pressure. In addition, when the main pipe expands due to water supplied from the supply source, the conventional fluid connector frequently causes the plug to separate from the coupling hole or a gap to form between the plug and the inner peripheral surface of the coupling hole. Summary of the invention

[0007] Technical issues

[0008] In order to solve the above-mentioned problems of the prior art, the object of the present invention is to provide a fluid connector with an improved structure, which can not only fix the main pipe connected to the fluid supply source along the height direction or the thickness direction, but also fix the main pipe along at least one direction of the circumferential direction and the length direction.

[0009] Technical Solution

[0010] In order to achieve the above-mentioned purpose, the fluid connector of the preferred embodiment of the present invention is combined with a coupling hole formed by a perforation in the main pipe, and the above-mentioned fluid connector includes: a plug-in, at least a portion of which is inserted into the above-mentioned coupling hole; an elastic bushing, which is movably installed on the above-mentioned plug-in so that at least a portion of it is inserted into the above-mentioned coupling hole together with the above-mentioned plug-in; a gasket, which is movably installed on the above-mentioned plug-in so as to be arranged on the outside of the above-mentioned main pipe in a state facing the above-mentioned elastic bushing; and a locking nut, which is threadedly combined with the above-mentioned plug-in so as to be arranged on the outside of the above-mentioned main pipe in a state facing the above-mentioned gasket. When the above-mentioned locking nut is threadedly combined with the above-mentioned plug-in, the above-mentioned elastic bushing is elastically deformed due to the pressure transmitted through the above-mentioned plug-in and the above-mentioned gasket, and the above-mentioned elastic bushing applies pressure to the inner corners at the lower end of the inner circumferential surface of the above-mentioned coupling hole and the outer corners at the upper end in the height direction of the above-mentioned main pipe, and at the same time, it can apply pressure in at least one direction of the length direction and the circumferential direction of the above-mentioned main pipe.

[0011] Effects of the Invention

[0012] The present invention relates to a fluid connector and has the following effects.

[0013] First, the present invention can make the inner sealing part and the outer sealing part of the elastic bushing apply pressure to the inner corners and the outer corners of the inner circumferential surface of the coupling hole formed in the main pipe in the height direction of the main pipe, and can also apply pressure in at least one direction of the length direction and the circumferential direction of the main pipe. Therefore, when the main pipe expands along the length direction and the circumferential direction due to high-pressure water, the present invention can prevent the fluid connector from being separated from the main pipe by firmly combining it with the elastic bushing, thereby preventing the generation of a gap between the outer circumferential surface of the elastic bushing and the inner circumferential surface of the coupling hole that may leak water.

[0014] Second, the present invention can be fixed to the through hole by applying pressure to the inner and outer corners of the coupling hole in the length direction and circumferential direction of the main pipe, which has a relatively higher rigidity than the main pipe in the thickness direction, using an elastic bushing. Therefore, compared with the existing fluid connector that applies pressure to the main pipe only in the thickness direction, the present invention can minimize the deformation of the main pipe caused by the installation of the fluid connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded perspective view of the fluid connector and the main pipe according to the first embodiment of the present invention.

[0016] Figure 2 for Figure 1 A three-dimensional view of the combination of the fluid connector and the main pipe is shown.

[0017] Figure 3 Observed from the length direction of the main pipe Figure 2A cross-sectional view of the fluid connector and main piping is shown.

[0018] Figure 4 When viewed from the width direction of the main pipe Figure 2 A cross-sectional view of the fluid connector and main piping is shown.

[0019] Figure 5 This is a cross-sectional view of the main pipe as viewed from the length direction of the main pipe.

[0020] Figure 6 A top view of the main piping.

[0021] Figure 7 A stereogram of the plug-in.

[0022] Figure 8 for Figure 7 The main view of the plugin is shown.

[0023] Fig. 9 for Figure 7 A side view of the insert is shown.

[0024] Fig.10 for Figure 7 A cross-sectional view of the insert is shown.

[0025] Fig.11 A three-dimensional diagram of an elastic bushing.

[0026] Fig.12 for Fig.11 A cross-sectional view of the elastic bushing is shown.

[0027] Fig.13 This is a perspective view of the gasket viewed from above.

[0028] Fig.14 For viewing from the bottom Fig.13 A perspective view of the pad is shown.

[0029] Fig.15 Observed from the length direction of the main pipe Fig.13 A cross-sectional view of the gasket is shown.

[0030] Fig.16 When viewed from the width direction of the main pipe Fig.13 A cross-sectional view of the gasket is shown.

[0031] Fig.17 A three-dimensional view of a locking nut.

[0032] Fig.18 for Fig.17 A cross-sectional view of the locking nut is shown.

[0033] Figures 19 to 21This is a diagram for explaining a method of installing a fluid connector on a main pipe.

[0034] Fig. 22 and Fig.23 A diagram for explaining the principle of fixing the main pipe wall with an elastic bushing.

[0035] Fig.24 and Fig.25 This is a diagram for explaining a method of connecting a branch pipe to a main pipe.

[0036] Fig.26 FIG. 4 is an exploded perspective view of a fluid connector according to a second embodiment of the present invention.

[0037] Fig. 27 for Fig.26 A combined stereoscopic view of the fluid connector is shown.

[0038] Fig.28 Observed from the length direction of the main pipe Fig. 27 A cross-sectional view of a fluid connector is shown.

[0039] Fig.29 When viewed from the width direction of the main pipe Fig. 27 A cross-sectional view of the fluid connector and main piping is shown.

[0040] Fig.30 A stereogram of the plug-in.

[0041] Fig.31 for Fig.30 The main view of the plugin is shown.

[0042] Fig.32 for Fig.30 A side view of the insert is shown.

[0043] Fig.33 for Fig.30 A cross-sectional view of the insert is shown.

[0044] Fig.34 A three-dimensional diagram of an elastic bushing.

[0045] Fig.35 for Fig.34 A cross-sectional view of the elastic bushing is shown.

[0046] Fig.36 This is a perspective view of the gasket viewed from above.

[0047] Fig.37 For viewing from the bottom Fig.36 A perspective view of the pad is shown.

[0048] Fig.38 Observed from the length direction of the main pipe Fig.36A cross-sectional view of the gasket is shown.

[0049] Fig.39 When viewed from the width direction of the main pipe Fig.36 A cross-sectional view of the gasket is shown.

[0050] Fig.40 A three-dimensional view of a locking nut.

[0051] Fig.41 for Fig.40 A cross-sectional view of the locking nut is shown.

[0052] Fig.42 A three-dimensional diagram of the sealing ring.

[0053] Fig.43 for Fig.42 A cross-sectional view of the seal ring is shown.

[0054] Fig.44 This figure shows the manner in which the seal between the plug-in and the branch pipe is provided by a sealing ring.

[0055] Figures 45 to 48 This is a diagram for explaining a method of connecting a main pipe and a branch pipe using a fluid connector.

[0056] Fig.49 It is an exploded perspective view of a fluid connector and a main pipe according to a third embodiment of the present invention.

[0057] Fig.50 for Fig.49 A three-dimensional view of the combination of the fluid connector and the main pipe is shown.

[0058] Fig.51 Observed from the length direction of the main pipe Fig.50 A cross-sectional view of the fluid connector and main piping is shown.

[0059] Fig.52 When viewed from the width direction of the main pipe Fig.50 A cross-sectional view of the fluid connector and main piping is shown.

[0060] Fig.53 This is a cross-sectional view of the main pipe as viewed from the length direction of the main pipe.

[0061] Fig.54 A top view of the main piping.

[0062] Fig.55 A stereogram of the plug-in.

[0063] Fig.56 for Fig.55 The main view of the plugin is shown.

[0064] Fig.57 for Fig.55 A side view of the insert is shown.

[0065] Fig.58 for Fig.55 A cross-sectional view of the insert is shown.

[0066] Fig.59 This is a perspective view of the gasket viewed from above.

[0067] Fig.60 For viewing from the bottom Fig.59 A perspective view of the pad is shown.

[0068] Fig.61 Observed from the length direction of the main pipe Fig.59 A cross-sectional view of the gasket is shown.

[0069] Fig.62 When viewed from the width direction of the main pipe Fig.59 A cross-sectional view of the gasket is shown.

[0070] Figures 63 to 75 This is a diagram for explaining a method of connecting a main pipe and a branch pipe using a fluid connector.

[0071] Fig.76 It is a diagram showing a state where the fluid connector and the fluid source according to the fourth embodiment of the present invention are separated.

[0072] Fig.77 To show Fig.76 A diagram showing the fluid connector in a state of being coupled to a fluid source.

[0073] Fig.78 and Fig.79 A diagram for explaining a method of forming a coupling hole by punching a hole in a fluid source wall.

[0074] Fig.80 This is the main view of the plugin.

[0075] Fig.81 A cross-sectional view of the plug-in.

[0076] Fig.82 A top view of the plug-in.

[0077] Fig.83 This is the front view of the elastic bushing.

[0078] Fig.84 A cross-sectional view of the elastic bushing.

[0079] Fig.85 A top view of the elastic bushing.

[0080] Fig.86 This is the front view of the pad.

[0081] Fig.87 A cross-sectional view of the gasket.

[0082] Fig.88 A top view of the pad.

[0083] Fig.89 The front view of the locking nut.

[0084] Fig.90 A cross-sectional view of the locking nut.

[0085] Fig.91 A top view of the locking nut.

[0086] Figure 92 to Figure 95 A diagram for explaining a method of placing a fluid connector at a fluid source.

[0087] Fig.96 A diagram for explaining the principle of fixing the wall of the fluid source with an elastic bushing.

[0088] Fig.97 It is a diagram showing a state where the fluid connector according to the fifth embodiment of the present invention is separated from the fluid source.

[0089] Fig.98 To show Fig.97 A diagram showing the fluid connector in a state of being coupled to a fluid source.

[0090] Fig.99 and Fig.100 A diagram for explaining a method of forming a coupling hole by punching a hole in a fluid source wall.

[0091] Fig.101 This is the main view of the plugin.

[0092] Fig.102 A top view of the plug-in.

[0093] Fig.103 This is a diagram showing a state where an inner pressurizing surface is formed on the insert head.

[0094] Fig.104 This is the front view of the pad.

[0095] Fig.105 A cross-sectional view of the gasket.

[0096] Fig.106 A top view of the pad.

[0097] Figures 107 to 113 A diagram for explaining a method of placing a fluid connector at a fluid source.

[0098] Fig.114 A diagram for explaining the principle of fixing the fluid source wall by the plug-in body and the gasket. DETAILED DESCRIPTION

[0099] Hereinafter, some embodiments of the present invention are described in detail through illustrative drawings. In the process of assigning reference numerals to the structural elements of each drawing, it should be noted that the same reference numerals are assigned to the same structural elements as much as possible even if they are shown in different drawings. In addition, in the process of describing the embodiments of the present invention, when it is judged that the specific description of the known structure or function may hinder the understanding of the embodiments of the present invention, its detailed description will be omitted.

[0100] When describing the structural elements of the embodiments of the present invention, terms such as "first", "second", "A", "B", "(a)", "(b)" and the like may be used. Such terms are only used to distinguish one structural element from another structural element, and such terms do not limit the nature, order or importance of the corresponding structural elements. Furthermore, unless otherwise defined, all terms used herein, including technical terms or scientific terms, have the same meaning as those commonly understood by ordinary technicians in the technical field to which the present invention belongs. Terms defined in commonly used dictionaries should be interpreted as having the same meaning as the contextual meaning of the relevant technology, and should not be interpreted as idealized or overly formalized meanings unless clearly defined in this specification.

[0101] Figure 1 FIG. 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 for Figure 1 The combined stereogram of the fluid connector and the main pipe shown in FIG. Figure 3 Observed from the length direction of the main pipe Figure 2 A cross-sectional view of the fluid connector and the main pipe is shown, Figure 4 When viewed from the width direction of the main pipe Figure 2 A cross-sectional view of the fluid connector and main piping is shown.

[0102] and, Figure 5 This is a cross-sectional view of the main pipe as viewed from the length direction of the main pipe. Figure 6 A top view of the main piping.

[0103] Reference Figures 1 to 4 The fluid connector 100 of the first embodiment of the present invention may include a plug-in 110, an elastic bushing 120, a gasket 130, a locking nut 140, and the like.

[0104] The main pipe 1 on which the fluid connector 100 can be provided is not particularly limited in terms of type. For example, an agricultural water pipe, a waterway pipe, etc., the main pipe 1 can be a pipe having a thickness greater than a predetermined reference, made of a material such as hard plastic or metal having a predetermined rigidity, and the main pipe 1 can maintain a predetermined shape even when the fluid is not contained in the main pipe 1 inside 1c.

[0105] Furthermore, the fluid connector 100 can be combined with a combination hole 4b formed in the wall of the main pipe 1 (hereinafter referred to as "main pipe wall 1a") to connect the interior 1c of the main pipe 1 with the outside. Figure 5 and Figure 6 As shown, in order to set the fluid connector 100 on the main pipe 1, the following work needs to be performed first, that is, using a drilling machine or other perforating tools to punch holes 1b for connecting the fluid connector 100 at specific positions of the main pipe 1 to be connected to the branch pipe 2. Preferably, the connecting hole 1b is formed in the height direction of the main pipe 1 perpendicular to the length direction or width direction of the main pipe 1, but it is not limited to this. In addition, the connecting hole 1b is preferably circular, but it is not limited to this.

[0106] The fluid connector 100 is described below based on the case where a circular coupling hole 1b is formed by punching along the height direction of the main pipe wall 1a. In addition, in the entire area of ​​the main pipe wall 1a, the surrounding area surrounding the coupling hole 1b is called the coupling hole surrounding portion 1d, the corner portion connecting the inner side surface of the coupling hole surrounding portion 1d and the inner peripheral surface of the coupling hole 1b is called the inner side corner 1e of the coupling hole 1b, and the corner portion connecting the outer side surface of the coupling hole surrounding portion 1d and the inner peripheral surface of the coupling hole 1b is called the outer side corner 1f of the coupling hole 1b.

[0107] Figure 7 A stereogram of the plug-in. Figure 8 for Figure 7 The main view of the plugin is shown, Fig. 9 for Figure 7 A side view of the plug-in is shown. Fig.10 for Figure 7 A cross-sectional view of the insert is shown.

[0108] The plug 110 is a component for connecting the main pipe 1 and the branch pipe so that the fluid flowing along the main pipe 1 can be transferred to the branch pipe 2. The plug 110 may include a plug body 111, a first external thread 113, a plug head 115, a discharge hole 117, and the like.

[0109] First, the plug body 111 is cylindrical and extends in the height direction of the fluid connector 100. Such a plug body 111 has a diameter that is smaller than the diameter of the coupling hole 1b by a predetermined ratio.

[0110] Next, the first external thread 113 is formed protrudingly on the outer peripheral surface of the plug-in body 111. In particular, preferably, the first external thread 113 is spaced apart from the upper end and the lower end of the plug-in body 111 by a predetermined interval, but is not limited thereto. The lower end of the plug-in body 111 refers to the end of the two side ends of the plug-in body 111 where the plug-in head 115 described below is formed, and the upper end of the plug-in body 111 refers to the end of the two side ends of the plug-in body 111 opposite to the above-mentioned lower end.

[0111] Furthermore, the first external thread 113 has an outer diameter that is a predetermined ratio larger than the diameter of the plug-in body 111 and a predetermined ratio smaller than the diameter of the coupling hole 1b. That is, when the worker performs the punching work of the coupling hole 1b, the coupling hole 1b should be punched according to a diameter that is a predetermined ratio larger than the outer diameter of the first external thread 113 to form the coupling hole 1b.

[0112] The first external thread 113 is formed with a guide groove 113a which is recessed along the height direction of the fluid connector 110 so that a guide block 132c of the gasket 130 described below can be movably inserted along the height direction of the fluid connector 100. The guide groove 113a will be described in detail later together with the guide block 132c.

[0113] Then, the insert head 115 is formed at the lower end of the insert body 111 to be concentric with the insert body 111 .

[0114] Also, the insert head 115 has a diameter that is the same as or smaller than the diameter of the coupling hole 1 b by a predetermined ratio.

[0115] Furthermore, an inner pressurizing surface 115a is formed on the upper surface of the plug head 115. The inner pressurizing surface 115a extends from the lower end of the plug body 111, and the height gradually decreases from the center of the plug 110 along the periphery and tilts downward. In particular, the tilt angle of the inner pressurizing surface 115a gradually decreases as it approaches the virtual center line C1 that passes through the center point of the plug 110 along the length direction of the main pipe 1, and the tilt angle may gradually increase as it moves away from the center line C1. The plug head 115 formed with such an inner pressurizing surface 115a is a curved shape bent into an arch, and its curvature corresponds 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.

[0116] The discharge hole 117 is formed through-hole inside the plug 110 to penetrate the plug head 115 and the plug body 111 along the height direction of the fluid connector 110 .

[0117] Fig.11 is a three-dimensional diagram of the elastic bushing. Fig.12 for Fig.11 A cross-sectional view of the elastic bushing is shown.

[0118] In the process of coupling the fluid connector 100 to the main pipe 1 , the elastic bush 120 refers to a component for sealing the coupling hole 1 b .

[0119] Furthermore, the elastic bushing 120 is made of an elastic material that can be elastically deformed. For example, the elastic bushing 120 can be made of a rubber material.

[0120] Furthermore, in addition to the height direction of the main pipe 1, the elastic bushing 120 can also apply pressure to the inner peripheral surface of the coupling hole 1b in the length direction and circumferential direction of the main pipe 1 that form a predetermined angle with the height direction of the main pipe 1, so that the corresponding elastic bushing 120 and the fluid connector 100 including it can be coupled with the main pipe 1. To this end, the elastic bushing 120 may include a coupling portion 122, a locking portion 124, an insertion hole 126, etc.

[0121] First, when the plug 110 is threadedly connected with the locking nut 140, as at least a portion of the connecting portion 122 undergoes elastic deformation due to the applied pressure, pressure can be applied to the inner corner 1e and the outer corner 1f of the connecting hole 1b in the height direction of the main distribution pipe 1, and pressure can be applied in at least one direction of the length direction and the circumferential direction of the main distribution pipe 1.

[0122] For this purpose, the coupling portion 122 has a length greater than the depth of the coupling hole 1 b by a predetermined ratio, so that the lower portion passes through the coupling hole 1 b by a predetermined length and protrudes into the interior 1 c of the main pipe 1 .

[0123] The shape of the coupling portion 122 is not particularly limited. For example, the coupling portion 122 may be in a cylindrical shape having the same diameter as that of the coupling hole 1b or having a diameter smaller than that of the coupling hole 1b by a predetermined ratio.

[0124] Then, when the plug 110 is threadedly coupled with the locking nut 140, the locking portion 124 is elastically deformed due to the applied pressure and can be locked and tightly attached to the outer side surface of the peripheral portion 1d of the coupling hole. For example, the locking portion 124 can be in the shape of a disk, extending from the upper end of the coupling portion 122 in a concentric manner with the coupling portion 122, and having a diameter that is larger than the diameter of the coupling hole 1b by a predetermined ratio.

[0125] Subsequently, the insertion hole 126 is concentric with the coupling portion 122 and the locking portion 124 , and can penetrate the coupling portion 122 and the locking portion 124 along the height direction of the fluid connector 100 .

[0126] Such insertion holes 126 may include a first insertion hole 126a, a second insertion hole 126b, a third insertion hole 126c, and the like.

[0127] The first insertion hole 126a is located at the lower part of the insertion hole 126. More specifically, the first insertion hole 126a passes through the lower part of the coupling portion 122. The first insertion hole 126a has a diameter that is the same as the diameter of the plug-in body 111 or is larger than the diameter of the plug-in body 111 by a predetermined ratio and smaller than the outer diameter of the first external thread 113 by a predetermined ratio, so that the lower end of the plug-in body 111 without the first external thread 113 can be inserted therein.

[0128] The first insertion hole 126 may be formed with a curved guide surface 126f, which is formed obliquely at the lower portion of the inner circumferential surface, so that the diameter of the corresponding first insertion hole 126 gradually widens along the lower end side. During the process of threaded fastening of the plug 110 and the lock nut 140, if pressure is applied to the coupling portion 122 along the height direction of the main pipe 1, the curved guide surface 126f may guide the lower portion of the coupling portion 122, so that the lower portion of the coupling portion 122 slides along at least one of the length direction and the circumferential direction of the main pipe 1 through the inner side pressurizing surface 115a of the plug 110 and bends to a predetermined degree.

[0129] The second insertion hole 126b is formed to extend from the upper end of the first insertion hole 126a so as to be located on the upper side of the first insertion hole 126a and connected to the first insertion hole 126a. More specifically, the second insertion hole 126b passes through the upper part of the coupling portion 122 and the lower part of the locking portion 124. Such a 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 proportion. Thus, the second insertion hole 126b can be connected to the first insertion hole 126a and 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, and hereinafter, the bottom surface of the second insertion hole 126b is referred to as the support surface 126d.

[0130] The third insertion hole 126c is formed to extend from the upper end of the second insertion hole 126b so as to be located on the upper side of the second insertion hole 126b and connected to the second insertion hole 126b. More specifically, the third insertion hole 126c passes through the upper part of the locking portion 124. This third insertion hole 126c has a diameter that is larger than the second insertion hole 126b by a predetermined proportion. Thus, the third insertion hole 126c can be connected to the second insertion hole 126b and form a stepped structure. In this case, the inner circumferential surface and the bottom surface of the third insertion hole 126c are connected to the outer pressure surface 132a of the gasket 130 described below, and when the elastic bushing 120 is aligned in a predetermined manner, it can be used as an alignment groove 126e that performs an auxiliary function, and can achieve a specified elastic deformation according to the curvature of the main distribution pipe 1.

[0131] As described above, in the case where the elastic bushing 120 is formed, the lower part of the coupling part 122 in which the first insertion hole 126a is formed is elastically deformed due to the pressure applied when the plug 110 and the lock nut 140 are threadedly engaged and tightly adheres to the inner corner 1e of the coupling hole 1b, and can be used as the inner sealing part 127. In this regard, preferably, the first insertion hole 126a has a depth greater than a predetermined reference, so that the fluid connector 100 can be applied to a variety of main pipes 1 with different thicknesses of the main pipe wall 1a. In addition, the corner part of the upper part of the coupling part 122 in which the second insertion hole 126b is formed and connected to the locking part 124 is elastically deformed due to the pressure applied when the plug 110 and the lock nut 140 are threadedly engaged and tightly adheres to the outer corner 1f of the coupling part 1b, and can be used as the outer sealing part 128. The inner sealing part 127 and the outer sealing part 128 will be described in detail later.

[0132] Fig.13 This is a three-dimensional view of the pad viewed from above. Fig.14 For viewing from the bottom Fig.13 A perspective view of the pad shown, Fig.15 Observed from the length direction of the main pipe Fig.13 A cross-sectional view of the liner shown, Fig.16 When viewed from the width direction of the main pipe Fig.13 A cross-sectional view of the gasket is shown.

[0133] When the insert 110 is threadedly coupled to the locking nut 140 , the gasket 130 is a component that converts the applied pressure in a predetermined manner to pressurize the elastic bushing 120 .

[0134] Furthermore, the gasket 130 may be made of plastic or other materials and have rigidity to maintain a shape. When the plug-in 110 is threadedly coupled to the locking nut 140 , the gasket 130 may not be deformed due to the applied pressure.

[0135] Also, the gasket 130 may include a gasket body 132 , a flange 134 , and the like.

[0136] First, the gasket body 132 has a cylindrical shape having a diameter greater than that of the coupling hole 1 b by a predetermined ratio.

[0137] In addition, the gasket body 132 may include an outer pressure surface 132a, an insertion hole 132b, a guide block 132c, etc. The outer pressure surface 132a is formed on the outer peripheral surface of the lower end of the gasket body 132 so as to be able to apply pressure to the alignment groove 126e of the elastic bushing 120; the insertion hole 132b is formed through the center portion along the height direction of the fluid connector 100, so that the first external thread 113 can be inserted therein in a movably manner; the guide block 132c is formed on the inner peripheral surface of the insertion hole 132b protruding along the height direction of the fluid connector 100.

[0138] The outer pressure surface 132a is an upwardly inclined surface formed on the outer peripheral surface of the lower end of the gasket body 132, and the height gradually increases from the center of the gasket 130 along the periphery. In particular, the inclination angle of the outer pressure surface 132a gradually decreases as it moves away from the virtual center line C2 that passes through the center of the gasket 130 along the length direction of the main pipe 1. The lower end of the gasket body 132 formed with such an outer pressure surface 132a is a curved shape bent into an arch, and its curvature corresponds to the curvature of the main pipe 1 based on the center line C2, so that the highest point of the outer pressure surface 132a is located on the center line C2.

[0139] The insertion hole 132b is formed through the center of the gasket body 132 along the height direction of the fluid connector 100. The insertion hole 132b has the same outer diameter as the first external thread 113 or has a diameter that is a predetermined ratio larger than the outer diameter of the first external thread 113, so that the first external thread 113 can be inserted therein in a movable manner.

[0140] The guide block 132c is formed to extend along the height direction of the fluid connector 100, and protrudes from the inner circumferential surface of the insertion hole 132b toward the center of the insertion hole 132b to be located on the center line C2 or a virtual vertical line perpendicular to the center line C2. In addition, the guide block 132c has a width smaller than the guide groove 113a, and can be inserted into the guide groove 113a of the first external thread 113 in a movable manner along the height direction of the fluid connector 100.

[0141] Next, the flange 134 is extended from the lower end of the gasket body 132 to be connected to the upper end of the outer pressure surface 132a.

[0142] Furthermore, the flange 134 is disc-shaped, has a diameter that is a predetermined proportion larger than the diameter of the gasket body 132, and is curved into an arch shape, and its curvature corresponds to the curvature of the main distribution pipe 1 based on the center line C2, so that the highest point of the maximum height is located on the center line C2.

[0143] Fig.17 The three-dimensional diagram of the locking nut. Fig.18 for Fig.17 A cross-sectional view of the locking nut is shown.

[0144] Then, in the process of coupling the elastic bushing 120 to the coupling hole 1 b , the lock nut 140 refers to a component for coupling the branch pipe 2 to the fluid connector 100 .

[0145] Preferably, the locking nut 140 is cylindrical and extends along the height direction of the fluid connector 100, but is not limited thereto. Such a locking nut 140 may include a first coupling hole 142, a second coupling hole 144, a sealing ring 146, and the like.

[0146] The first coupling hole 142 is formed at the lower part of the locking nut 140 through a hole along the height direction of the fluid connector 100, so that the plug-in body 111 can be inserted therein. In addition, the first coupling hole 142 has a predetermined length, and when the coupling portion 122 of the elastic bushing 120 is coupled to the main pipe 1 through the threaded fastening of the plug-in 110 and the locking nut 140, the upper end of the plug-in body 111 coupled to the first coupling hole 142 contacts the sealing ring 146 and does not contact the end of the branch pipe 2 coupled to the second coupling hole 144.

[0147] A first internal thread 142a is formed on the inner circumferential surface of the first coupling hole 142, which can be threadedly coupled with the first external thread 113 of the plug-in body 111. Thus, the plug-in body 111 can be gradually coupled to the locking nut 140 by rotating the locking nut 140 along a predetermined tightening direction through the first external thread 113 and gradually inserting the plug-in body 111 into the first coupling hole 142, or the plug-in body 111 can be gradually separated from the locking nut 140 by rotating the locking nut 140 along an unlocking direction opposite to the above-mentioned tightening direction through the first external thread 113 and gradually withdrawing the plug-in body 111 from the first coupling hole 142.

[0148] The second coupling hole 144 can be used to insert the end of the branch pipe 2, and is formed in the upper part of the locking nut 140 through a hole along the height direction of the fluid connector 100, so that the lower end of the corresponding second coupling hole 144 is closed with the upper end of the first coupling hole 142. In addition, the second coupling hole 144 has a predetermined length, and when the end of the branch pipe 2 is coupled with the second coupling hole 144, the end of the branch pipe 2 is in contact with the sealing ring 146 but not in contact with the upper end of the plug-in body 111 coupled to the first coupling hole 142.

[0149] The second coupling hole 144 has a second internal thread 144a formed on its inner circumference, which can be threadedly coupled to a second external 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 in detail later.

[0150] On the other hand, the first coupling hole 142 and the second coupling hole 144 may have different diameters according to the difference between the diameter of the plug body 111 and the diameter of the one end 2b of the branch pipe 2. For example, if the diameter of the one end 2b of the branch pipe 2 is larger than the diameter of the plug body 111, the second coupling hole 144 may have a larger diameter than the first coupling hole 142.

[0151] The seal ring 146 is in a circular ring shape and has a through hole 146 a formed in the center.

[0152] The sealing ring 146 is disposed between the upper end of the plug body 111 coupled to the first coupling hole 142 and the end 2 b of the branch pipe 2 coupled to the second coupling hole 144 , and can seal between the upper end of the plug body 111 and the end 2 b of the branch pipe 2 .

[0153] For example, if the diameter of the second coupling hole 144 is larger than the diameter of the first coupling hole 142, the sealing ring 146 may be placed on the bottom surface of the second coupling hole 144 that is closed to the upper end of the first coupling hole 142. Such a sealing ring 146 has the same structure as a common sealing ring, and therefore, a detailed description thereof will be omitted.

[0154] Figures 19 to 21 This is a diagram for explaining a method of installing a fluid connector in a main pipe. Fig. 22 and Fig.23 This is a diagram for explaining the principle of fixing the main pipe wall with an elastic bushing. Fig.24 and Fig.25 This is a diagram for explaining a method of connecting a branch pipe to a main pipe.

[0155] First, the connecting hole 1b is formed by punching the main pipe wall 1a using a punching tool.

[0156] Next, the insert body 111 and the first external thread 113 are inserted into the insertion hole 126 to combine the insert 110 with the elastic bushing 120 , so that the lower end of the first external thread 113 of the insert 110 is supported by the support surface 126 d of the elastic bushing 120 .

[0157] Subsequently, the locking portion 124 of the elastic bushing 120 is locked at the highest point of the outer peripheral surface of the portion 1d around the coupling hole, and at the same time, the plug-in head 115, the lower portion of the plug-in body 111 connected to the plug-in head 155, and the coupling portion 122 of the elastic bushing 120 are inserted into the coupling hole 1b so that the outer sealing portion 128 of the elastic bushing 120 is in contact with the outer corner 1f. In this case, the plug-in head 115 is inserted into the coupling hole 1b so that the center line C1 becomes the same as the length direction of the main pipe 1. As a result, the entire area of ​​the plug-in head 115 and the lower portion of the plug-in body 111 pass through the coupling hole 1b and protrude to form an interior 1c of the main pipe 1. At the same time, as Fig.19As shown in part (b) of FIG. 1 , when the main pipe 1 is viewed from the width direction of the main pipe 1, the locking portion 124 is locked on the outer peripheral surface of the surrounding portion 1d of the coupling hole, and the lower portion of the coupling portion 122 passes through the coupling hole 1b for a predetermined length and protrudes into the interior 1c of the main pipe 1. Correspondingly, Fig.19 As shown in part (a), when the main pipe 1 is observed from the length direction of the main pipe 1, the locking portion 124 is separated from the outer peripheral surface of the main pipe 1 along the + height direction, and the lower portion of the coupling portion 122 is protruded in the interior 1c of the main pipe 1 or is located in the interior of the coupling hole 1b with a shorter length than the case where the main pipe 1 is observed from the width direction of the main pipe 1.

[0158] Then, the insert body 111 and the first external thread 113 are inserted into the insertion hole 132b of the gasket 130 to combine the gasket 130 with the insert 110, so that the outer pressure surface 132a of the gasket 130 faces the alignment groove 126e of the elastic bushing 120. In this case, preferably, when the gasket 130 is combined with the insert 110, the outer pressure surface 132a and the alignment groove 126e of the elastic bushing 120 should be separated by a predetermined interval.

[0159] Furthermore, the combination between the gasket 130 and the plug 110 allows the guide block 132c to be movably inserted into the guide groove 113a of the first external thread 113 along the height direction of the fluid connector 100. Thus, the gasket 130 allows the center line C2 to be aligned with the length direction of the main pipe 1, and the flange 134 can surround the outer peripheral surface of the main pipe 1 along the circumferential direction of the main pipe 1.

[0160] Next, in a state where the upper end of the first external thread 113 of the plug-in 110 is hung on the lower end of the first internal thread 142a of the locking nut 140, the locking nut 140 is rotated along a predetermined tightening direction by the first external thread 113 of the plug-in 110 and the upper end of the plug-in body 111 and the upper part of the first external thread 113 are inserted into the first coupling hole 142 by a predetermined length, so that the locking nut 140 is coupled to the plug-in 110. In this case, preferably, when the locking nut 140 is coupled to the plug-in 110, the lower end should be placed on the upper end of the gasket body 132, but it is not limited thereto.

[0161] When the upper end of the first external thread 113 is hung on the lower end of the first internal thread 142a, if the locking nut 140 is rotated and tightened by the first external thread 113, as the plug-in 110 rises and the locking nut 140 descends, the interval between the plug-in head 115 and the locking nut 140 gradually becomes smaller, thereby, the plug-in body 111 is gradually inserted into the first combining hole 142 through the lower opening of the first combining hole 142 of the locking nut 140, and the interval between the plug-in head 115, the elastic bushing 120, the gasket 130 and the locking nut 140 gradually becomes smaller. In this regard, as the plug-in head 115, the elastic bushing 120, the gasket 130 and the lock nut 140 are in close contact with each other, when the lock nut 140 is further tightened while the lock nut 140 is tightened, the plug-in head 115 applies pressure to the elastic bushing 120 in the +thickness direction of the main pipe 1, and the lock nut 140 applies pressure to the gasket 130 in the -height direction of the main pipe 1. Furthermore, the gasket 130 applies pressure to the elastic bushing 120 in the -height direction of the main pipe 1 by the pressure applied from the lock nut 140. In this case, the elastic bushing 120 can be elastically deformed by receiving the pressure from the plug-in head 115 and the gasket 130 in both the upper and lower directions.

[0162] Subsequently, the locking nut 140 is rotated along a predetermined tightening direction through the first external thread 113 of the plug 110 until the upper end of the plug body 111 contacts the sealing ring 146 of the locking nut 140 , so that the locking nut 140 is permanently combined with the plug 110 .

[0163] As described above, if the locking nut 140 is permanently combined with the plug 110 , the flange 134 of the gasket 130 presses the locking portion 124 toward the outer circumference of the main pipe 1 , thereby the locking portion 124 can be elastically deformed into a curved shape by the flange 134 and tightly adhere to the outer circumference of the main pipe 1 .

[0164] Furthermore, the outer pressure surface 132a of the gasket 130 applies pressure to the inner side surface of the alignment groove 126e of the elastic bushing 120 along the -height direction through the above-mentioned inclined structure, and at the same time, can apply pressure along at least one direction of the length direction and the circumferential direction of the main pipe 1. In this case, as the coupling portion 122 elastically deforms, the lower portion of the coupling portion 122 protrudes through the coupling hole 1b to form an inner portion 1c of the main pipe 1 through the coupling hole 1b, and at the same time, the outer sealing portion 128 elastically deformed by the outer pressure surface 132a applies pressure to the outer corner 1f of the coupling hole 1b along the -height direction of the main pipe 1, and at the same time, can apply pressure along at least one direction of the length direction and the circumferential direction of the main pipe 1.

[0165] The main pipe 1 is a cylindrical shape with a specified curvature, and the depth of the coupling hole 1b, the angle of the outer corner 1f, the height of the outer corner 1f, etc. have different values ​​according to each part of the coupling hole 1b. Therefore, in the overall pressure applied by the outer sealing portion 128 to the outer corner 1f, the ratio of the pressure applied along the length direction of the main pipe 1 to the pressure applied along the circumferential direction of the main pipe 1 has different values ​​according to each part of the coupling hole 1b. More specifically, when the cross section of the main pipe 1 cut along the center line C1 of the plug body 111 is observed from the width direction of the main pipe 1, the angle of the outer corner 1f is the maximum value (vertical), the height of the outer corner 1f is the maximum value, and the outer sealing portion 128 does not apply pressure to the outer corner 1f along the circumferential direction of the main pipe 1, but only applies pressure along the length direction of the main pipe 1. On the contrary, when the cross section of the main pipe 1 cut perpendicularly to the center line C1 of the plug body 111 is observed from the length direction of the main pipe 1, the angle of the outer corner 1f is the minimum value (acute angle), the height of the outer corner 1f is the minimum value, and the outer sealing portion 128 does not apply pressure to the outer corner 1f along the length direction of the main pipe 1, but only applies pressure along the circumferential direction of the main pipe 1. That is, the pressure applied along the length direction of the main pipe 1 gradually decreases from the length direction of the main pipe 1 to the circumferential direction, and the pressure applied along the circumferential direction of the main pipe 1 gradually increases.

[0166] However, the inclination angle of the outer pressurizing surface 132a gradually decreases as it moves away from the center line C2. In this regard, as described above, if the plug 110 and the gasket 130 are provided, the contact angle between the outer pressurizing surface 132a and the outer corner 1f becomes substantially the same across the entire area of ​​the outer corner 1f. Thus, among the total pressure applied by the outer sealing portion 128 to the outer corner 1f, the sum of the pressure applied along the length direction of the main pipe 1 and the pressure applied along the circumferential direction of the main pipe 1, that is, the total pressure value can become substantially the same across the entire area of ​​the outer corner 1f.

[0167] Furthermore, the inner pressure surface 115a of the plug head 115 applies pressure to the inner sealing portion 127 formed by the above-mentioned inclined structure protruding in the inner portion 1c of the main pipe 1 in the + height direction of the main pipe 1, and at the same time, applies pressure in at least one direction of the length direction and the circumferential direction of the main pipe 1. In this case, the inner sealing portion 127 elastically deformed by the above-mentioned inner pressure surface 115a applies pressure to the inner corner 1e of the coupling hole 1b in the + height direction of the main pipe 1, and at the same time, applies pressure in at least one direction of the length direction and the circumferential direction of the main pipe 1.

[0168] The main pipe 1 is a cylindrical shape with a specified curvature, and the depth of the coupling hole 1b, the angle of the inner corner 1e, the height of the inner corner 1e, etc. can have different values ​​according to the various parts of the coupling hole 1b. Therefore, in the overall pressure applied by the inner sealing portion 127 to the inner corner 1e, the ratio of the pressure applied to the length direction of the main pipe 1 and the pressure applied to the circumferential direction of the main pipe 1 can have different values ​​according to the various parts of the coupling hole 1b. More specifically, when the cross section of the main pipe 1 cut along the center line C1 of the plug body 111 is observed from the width direction of the main pipe 1, the angle of the inner corner 1e is the minimum value (vertical), the height of the inner corner 1e is the maximum value, and the inner sealing portion 127 does not apply pressure to the inner corner 1e in the circumferential direction of the main pipe 1, but only applies pressure in the length direction of the main pipe 1. On the contrary, when the cross section of the main pipe 1 cut perpendicularly to the center line C1 of the plug body 111 is observed from the length direction of the main pipe 1, the angle of the inner corner 1e is the maximum value (obtuse angle), the height of the inner corner 1e is the minimum value, and the inner sealing portion 127 does not apply pressure to the inner corner 1e in the length direction of the main pipe 1, but only applies pressure in the circumferential direction of the main pipe 1. Correspondingly, the pressure applied in the length direction of the main pipe 1 gradually decreases from the length direction of the main pipe 1 along the circumferential direction, and the pressure applied in the circumferential direction of the main pipe 1 gradually increases.

[0169] However, the inclination angle of the inner pressurizing surface 115a gradually decreases as it approaches the center line C1. In this regard, as described above, if the plug 110 is provided, the contact angle of the inner pressurizing surface 115a with the inner corner 1e becomes substantially the same across the entire area of ​​the inner corner 1e. Thus, among the total pressure applied by the inner sealing portion 127 to the inner corner 1e, the sum of the pressure applied along the length direction of the main pipe 1 and the pressure applied along the circumferential direction of the main pipe 1, that is, the total pressure value can become substantially the same across the entire area of ​​the inner corner 1e.

[0170] Furthermore, as described above, a curved guide surface 126f is formed at the lower portion of the first insertion hole 126. If pressure is applied to the coupling portion 122 along the height direction of the main pipe 1, the curved guide surface 126f can guide the lower portion of the coupling portion 122 so that the lower portion of the coupling portion 122 slides along at least one of the length direction and the circumferential direction of the main pipe 1 through the inner pressurizing surface 115a of the plug 110. By means of the curved guide surface 126f, as the lower portion of the coupling portion 122 slides along the curved guide surface 126f and bends toward at least one of the length direction and the circumferential direction of the main pipe 1, the coupling portion 122 provided with the inner sealing portion 127 can generate a predetermined elastic deformation in a predetermined deformation manner.

[0171] Then, the branch pipe 2 is coupled to the lock nut 140 .

[0172] The branch pipe 2 is a device for forming a branch flow from the main flow flowing along the main pipe 1, and may include an on-off valve 2a and a second external thread 2c, etc. The on-off valve 2a is used to open and close the corresponding branch pipe 2, and the second external thread 2c is formed on the outer peripheral surface of the one end 2b so as to be threadedly engaged with the second internal thread 144a of the locking nut 140. After the one end 2b is inserted into the second coupling hole 144 of the locking nut 140, as the second external thread 2c is threadedly engaged with the second internal thread 144a of the locking nut 140, the branch pipe 2 can be coupled with the locking nut 140.

[0173] As described above, if the branch pipe 2 is combined with the locking nut 140, the interior 1c of the main pipe 1 and the branch pipe 2 can be connected in sequence through the discharge hole 117 of the plug-in 110, the first combining hole 142 and the second combining hole 144 of the locking nut 140, thereby, the water and other fluids W flowing along the interior 1c of the main pipe 1 can be transmitted to the branch pipe 2.

[0174] As described above, when the fluid connector 100 passes through the entire area of ​​the coupling hole 1b and maintains the inner corner 1e and the outer corner 1f in contact with the inner sealing portion 127 and the outer sealing portion 128, the inner sealing portion 127 and the outer sealing portion 128 not only fix the inner corner 1e and the outer corner 1f along the height direction of the main pipe 1, but also fix them along at least one of the length direction and the circumferential direction of the main pipe 1. Therefore, when the main pipe 1 expands along the length direction and the circumferential direction due to high-pressure water, in order to prevent the fluid connector 100 from being separated from the main pipe 1, the fluid connector 100 can be firmly connected to the main pipe 1 through the elastic bushing 120, and a gap that may leak water can be prevented from being generated between the outer circumferential surface of the elastic bushing 120 and the inner circumferential surface of the coupling hole 1b.

[0175] Furthermore, the fluid connector 100 can be fixed to the coupling hole 1b by applying pressure to the inner corner 1e and the outer corner 1f of the coupling hole 1b along the length direction and the circumferential direction of the main pipe 1, which are relatively more rigid than the thickness direction of the main pipe 1, using the elastic bushing 120. Therefore, compared with the existing fluid connector that applies pressure to the main pipe 1 only along the thickness direction, the fluid connector 100 of the present invention can minimize the deformation of the main pipe 1 caused by the setting of the fluid connector 100.

[0176] Furthermore, in the fluid connector 100, in order to enable the inner pressure surface 115a of the plug head 115, the outer pressure surface 132a of the gasket 130, and the flange 134 to uniformly apply pressure to the inner corner 1e and the outer corner 1f of the main pipe 1 without considering the pressurizing direction, the inner pressure surface 115a of the plug head 115, the outer pressure surface 132a of the gasket 130, and the flange 134 are formed into an arch structure and a curved surface structure having a curvature corresponding to the curvature of the main pipe 1, thereby preventing the fluid connector 100 from detaching from the coupling hole 1b due to uneven coupling force between the pressurizing directions.

[0177] Fig.26 is an exploded perspective view of a fluid connector according to a second embodiment of the present invention. Fig. 27 for Fig.26 The combined stereogram of the fluid connector shown, Fig.28 Observed from the length direction of the main pipe Fig. 27 A cross-sectional view of a fluid connector is shown, Fig.29 When viewed from the width direction of the main pipe Fig. 27 A cross-sectional view of the fluid connector and main piping is shown.

[0178] Reference Figure 26 to Figure 29 The fluid connector 200 of the second embodiment of the present invention may include a plug-in 210, an elastic bushing 220, a gasket 230, a locking nut 240, a sealing ring 250, etc. The fluid connector 200 includes the gasket 230 and the sealing ring 250, and has an improved structure compared to the above-mentioned fluid connector 100. In the following, the contents related to the same structures included in the fluid connectors 100 and 200 are briefly described or omitted.

[0179] Fig.30 A stereogram of the plug-in. Fig.31 for Fig.30 The main view of the plugin is shown, Fig.32 for Fig.30 A side view of the plug-in is shown, Fig.33 for Fig.30 A cross-sectional view of the insert is shown.

[0180] The plug-in 210 may include an plug-in body 211 , a first external thread 213 , an plug-in head 215 , a discharge hole 217 , and the like.

[0181] Also, a guide groove 213 a is recessed and formed in the first external thread 213 .

[0182] Furthermore, an insertion guide surface 215a is formed on the side of the plug-in head 215, and an inner pressurizing surface 215b is formed on the upper surface of the plug-in head 215. The insertion guide surface 215a is used to guide the plug-in head 215 so that the plug-in head 215 can be easily inserted into the coupling hole 1b. Preferably, the plug-in head 215 has an inclined structure in which the diameter gradually decreases along the lower end side of the plug-in head 215, but it is not limited thereto.

[0183] Furthermore, the inclination angle of the inner pressurizing surface 215b gradually decreases as it approaches the center line C1, and gradually increases as it moves away from the center line C1. The plug head 215 formed with such an inner pressurizing surface 215b is in an arched curved shape, and its curvature corresponds 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.

[0184] Fig.34 is a three-dimensional diagram of the elastic bushing. Fig.35 for Fig.34 A cross-sectional view of the elastic bushing is shown.

[0185] The elastic bushing 220 may include a coupling portion 222 , a locking portion 224 , an insertion hole 226 , and the like.

[0186] The lower outer peripheral surface of the coupling part 222 may be an inclined surface in which the diameter of the coupling part 222 gradually narrows along the lower end of the coupling part 222. Thus, the coupling part 222 can be further easily inserted into the coupling hole 1b.

[0187] The insertion holes 226 may include a first insertion hole 226 a , a second insertion hole 226 b , a third insertion hole 226 c , and the like.

[0188] Furthermore, a curved guide surface 226f is formed at a lower portion of the inner peripheral surface of the first insertion hole 226a.

[0189] Furthermore, a support surface 226d is formed on the bottom surface of the second insertion hole 226b.

[0190] Furthermore, an alignment groove 226e is formed on the inner peripheral surface and the bottom surface of the third insertion hole 226c.

[0191] As described above, as the insertion hole 226 is formed, the lower portion of the coupling portion 222 formed inside the first insertion hole 226a serves as the inner sealing portion 227. In this regard, preferably, the first insertion hole 226a has a length greater than a predetermined reference so that the fluid connector 200 can be applied to the main pipe 1 having various thicknesses and diameters. And, as the corner portion of the upper portion of the coupling portion 222 formed inside the second insertion hole 226b connected to the locking portion 224 is elastically deformed by the outer pressure surface 234 of the gasket 230, it will serve as the outer sealing portion 228 that contacts the outer corner 1f of the coupling hole 1b.

[0192] The lower portion of the coupling portion 222 may be used as an inner sealing portion 227 , and the corner portion where the upper portion of the coupling portion 222 formed inside the second insertion hole 226 b and connected to the locking portion 224 may be used as an outer sealing portion 228 .

[0193] Fig.36 This is a three-dimensional view of the pad viewed from above. Fig.37 For viewing from the bottom Fig.36 A perspective view of the pad shown, Fig.38 Observed from the length direction of the main pipe Fig.36 A cross-sectional view of the liner shown, Fig.39 When viewed from the width direction of the main pipe Fig.36 A cross-sectional view of the gasket is shown.

[0194] Also, the gasket 230 may include a gasket body 231 , a flange 232 , an alignment protrusion 233 , an outer pressurizing surface 234 , a curved guide surface 235 , a fixing protrusion 236 , and the like.

[0195] First, the gasket body 231 has a cylindrical shape having a diameter greater than that of the coupling hole 1 b by a predetermined ratio.

[0196] Furthermore, the gasket body 231 may include an insertion hole 231a, a guide block 231b, etc. The insertion hole 231a is formed in the center portion along the height direction of the fluid connector 200, so that the first external thread 213 can be inserted therein in a movably manner. The guide block 231b is formed on the inner circumferential surface of the insertion hole 231a protruding along the height direction of the fluid connector 200.

[0197] The insertion hole 231a is formed through the center of the gasket body 231 along the height direction of the fluid connector 200, so that the insertion body 211 and the first external thread 213 can be inserted therein in a movable manner. In addition, the insertion hole 231a may include: a first insertion hole 231c formed at the lower part of the gasket body 231, having a diameter that is the same as the outer diameter of the first external thread 213 or a predetermined ratio larger than the outer diameter of the first external thread 213, so that the first external thread 213 can be inserted therein in a movable manner; and a second insertion hole 231d formed at the upper part of the gasket body 231 so that the lower end is connected to the upper end of the first insertion hole 231c, and having a diameter that is a predetermined ratio larger than the diameter of the first insertion hole 231c. As described above, if the first insertion hole 231c and the second insertion hole 231d are formed, the second insertion hole 231d is connected to the first insertion hole 231c to form a stepped structure, whereby the bottom surface of the second insertion hole 231d can be used as a placement surface 231e for placing the lower end of the locking nut 240.

[0198] The guide block 231b protrudes from the inner circumferential surface of the insertion hole 231a toward the center of the insertion hole 231a, and is formed to extend along the height direction of the fluid connector 200. In addition, the guide block 231b can be inserted into the guide groove 213a of the first external thread 213 in a movable manner along the height direction of the fluid connector 200, and its width is smaller than the guide groove 213a.

[0199] The flange 232 is formed to extend from the lower end of the gasket body 231 and is connected to the lower end of the gasket body 231 .

[0200] Furthermore, the flange 232 is in a disc shape and has a diameter that is larger than the diameter of the gasket body 231 by a predetermined ratio. In particular, the flange 232 is in a curved shape that is bent into an arch shape, and its curvature corresponds to the curvature of the main pipe 1 based on the center line C2, so that the highest point of the maximum height is located on the virtual center line C2 that passes through the center of the gasket 230 along the length direction of the main pipe 1.

[0201] The alignment protrusion 233 is formed protruding from the lower surface of the flange 232, and can be inserted into the alignment groove 226e of the elastic bushing 220 along the -height direction of the main pipe 1 when the fluid connector 200 is provided on the main pipe 1. Preferably, the alignment protrusion 233 is annular surrounding the first insertion hole 231c, but is not limited thereto.

[0202] In particular, the height of the alignment protrusion 233 gradually decreases as it moves away from the center line C2. The alignment protrusion 233 is inserted into the alignment groove 226e of the elastic bushing 220 to align the elastic bushing 220 in a predetermined manner to assist the elastic bushing 220 in generating a predetermined elastic deformation.

[0203] The outer pressure surface 234 is formed on the bottom surface of the flange 232 and extends from the upper end of the outer peripheral surface of the alignment protrusion 233. The outer pressure surface 234 is an upwardly inclined surface whose height gradually increases from the center of the gasket 230 along the periphery. In particular, the inclination angle of the outer pressure surface 234 gradually decreases as it moves away from the center line C2 of the gasket 230.

[0204] The outer pressure surface 234 is formed to extend from the upper end of the outer peripheral surface of the alignment protrusion 233 along the outer peripheral side of the gasket 230, and when the main pipe 1 is provided with the fluid connector 200, it faces the outer corner 1f of the coupling hole 1b via the outer sealing portion 228 of the elastic bushing 220. The outer pressure surface 234 is an upwardly inclined surface whose height gradually increases from the center of the gasket 230 along the outer peripheral side. In particular, the inclination angle of the outer pressure surface 234 gradually decreases as it moves away from the center line C2 of the gasket 230. The outer pressure surface 234 will be described in further detail later.

[0205] The curved guide surface 235 extends from the upper end of the outer pressure surface 234 along the outer peripheral side of the gasket body 231 and is formed on the bottom surface of the flange 232. In the curved guide surface 235, the highest point extending along the length direction of the main pipe 1 according to the center line C2 constitutes a horizontal plane, and the remaining part except the center line C2 can constitute a downward inclined surface whose height gradually decreases as it moves away from the center line C2. Therefore, the curved guide surface 235 can make the locking portion 224 of the elastic bushing 220 closely attached to the outer peripheral surface of the main pipe 1.

[0206] The fixing protrusion 236 is formed on the bottom surface of the flange 232 so as to extend from the outer end of the curved 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, and when the main pipe 1 is provided with the fluid connector 200, it is more closely attached to the outer side surface of a region of the main pipe wall 1a away from the coupling hole 1b by a predetermined distance than the surrounding portion 1d of the coupling hole.

[0207] Furthermore, the fixing protrusion 236 is annular, and its inner diameter is larger than the outer diameter of the locking portion 224, so as to apply pressure to the outer side of the main pipe wall 1a when the main pipe 1 is provided with the fluid connector 200. Thus, the fixing protrusion 236 is closely attached to the outer side of the main pipe wall 1a, so that the friction force acts between the corresponding fixing protrusion 236 and the main pipe wall 1a, thereby fixing the fluid connector 200 to prevent it from being separated from the main pipe 1.

[0208] Fig.40 The three-dimensional diagram of the locking nut. Fig.41 for Fig.40 A cross-sectional view of the locking nut is shown.

[0209] The locking nut 240 may include a first coupling hole 242 , a second coupling hole 244 , and the like.

[0210] A first internal thread 242 a is formed on the inner peripheral surface of the first coupling hole 242 .

[0211] A second internal thread 244 a is formed on the inner peripheral surface of the second coupling hole 244 .

[0212] Fig.42 is a three-dimensional diagram of the sealing ring. Fig.43 for Fig.42 A cross-sectional view of the sealing ring is shown. Fig.44 This figure shows the manner in which the seal between the plug-in and the branch pipe is provided by a sealing ring.

[0213] The sealing ring 250 is in the shape of a circular ring, has a through hole 252 formed in the center, and is made of rubber or other elastically deformable materials.

[0214] Furthermore, the sealing ring 250 is disposed between the upper end of the plug-in body 211 coupled to the first coupling hole 242 and the end 2 b of the branch pipe 2 coupled to the second coupling hole 244 , and can seal between the upper end of the plug-in body 211 and the end 2 b of the branch pipe 2 .

[0215] For example, when the diameter of the second coupling hole 244 is greater than that of the first coupling hole 242, the sealing ring 250 may be disposed on the bottom surface 244b of the second coupling hole 244. In this case, the sealing ring 250 has a diameter greater than the diameter of the end 2b of the branch pipe 2 by a predetermined ratio.

[0216] The above-mentioned sealing ring 250 may include a through hole 252, a locking protrusion 254, etc. The above-mentioned through hole 252 is formed through the center portion so that the plug-in 210 is connected to the branch pipe 2. The above-mentioned locking protrusion 254 is protrudingly formed on the outer peripheral surface of the sealing ring 250, so that the sealing ring 250 is locked in the second internal thread 244a of the locking nut 240 and fixed at a predetermined position of the second combining hole 244.

[0217] Furthermore, the through hole 252 includes a first through hole 252a, a second through hole 252b, etc. The first through hole 252a is formed at the lower part of the sealing ring 250 and has a diameter that is the same as the diameter of the plug-in body 211 or a predetermined ratio larger than the diameter of the plug-in body 211. The second through hole 252b is formed at the upper part of the sealing ring 250, and the lower end is connected to the upper end of the first through hole 252a and has a diameter that is a predetermined ratio smaller than the diameter of the plug-in body 211. Thus, the first through hole 252a and the second through hole 252b are connected to form a stepped structure, and the top surface 252c of the first through hole 252a can be used as a supporting surface for supporting the plug-in body 211.

[0218] Furthermore, preferably, the second through hole 252b has an inclined structure in which the diameter gradually decreases along the upper end of the sealing ring 250, but the present invention is not limited thereto. Thus, the one end 2b of the branch pipe 2 is inserted into the second coupling hole 244 of the locking nut 240. When the branch pipe 2 is coupled with the locking nut 240, as the sealing ring 250 is elastically deformed by the pressure of the one end 2b of the branch pipe 2, even if the diameter of the second through hole 252b is partially expanded, the contact state between the one end 2b of the branch pipe 2 and the sealing ring 250 can be stably maintained.

[0219] Figures 45 to 48 This is a diagram for explaining a method of connecting a main pipe and a branch pipe using a fluid connector.

[0220] Hereinafter, a method of connecting a main pipe and a branch pipe using a fluid connector will be described with reference to the drawings.

[0221] First, the connecting hole 1b is formed by punching the main pipe wall 1a using a punching tool.

[0222] Next, the insert body 211 and the first external thread 213 are inserted into the insertion hole 226 to combine the insert 210 with the elastic bushing 220 .

[0223] Then, the plug head 215, the lower part of the plug body 211 connected to the plug head 215, and the coupling part 222 of the elastic bushing 220 are inserted into the coupling hole 1b. In this case, the plug head 215 is inserted into the coupling hole 1b so that the center line C1 and the length direction of the main pipe 1 become the same.

[0224] Then, the insert body 211 and the first external thread 213 are inserted into the insertion hole 231 a of the gasket 230 to combine the gasket 230 with the insert 210 .

[0225] Next, the upper end of the plug body 211 and the upper part of the second external thread 213 are inserted into the first coupling hole 242 by a predetermined length, and the locking nut 240 is rotated and tightened along a predetermined tightening direction by the first external thread 213 of the plug 210 to temporarily combine the locking nut 240 with the plug 210.

[0226] Subsequently, the upper end of the plug body 211 is brought into contact with the sealing ring 250 of the locking nut 240 , and the locking nut 240 is rotated and tightened along a predetermined tightening direction by the first external thread 213 of the plug 210 to permanently combine the locking nut 240 with the plug 210 .

[0227] As described above, if the lock nut 240 is permanently combined with the plug 210, as the inner sealing portion 227 and the outer sealing portion 228 of the elastic gasket 220 are elastically deformed by the inner pressurizing surface 215b of the plug body 211 and the outer pressurizing surface 234 of the gasket 230, the inner corner 1e and the outer corner 1f of the coupling hole 1b are pressed in the height direction of the main pipe 1, and at least one of the length direction and the circumferential direction of the main pipe 1 is pressed. Thus, the elastic bushing 220 and the fluid connector 200 can be combined with the main pipe 1.

[0228] Furthermore, when the elastic bushing 220 is aligned in a predetermined manner by inserting the fixing protrusion 233 in the alignment groove 226e, the inner sealing portion 227 and the outer sealing portion 228 can produce a specified elastic deformation. Thus, the inner sealing portion 227 and the outer sealing portion 228 can prevent the problem of reduced bonding force between the main distribution pipe 1 and the elastic bushing 220 due to irregular elastic deformation.

[0229] Then, the branch pipe 2 is coupled to the lock nut 240 .

[0230] Fig.49 FIG. 1 is an exploded perspective view of a fluid connector and a main pipe according to a third embodiment of the present invention. Fig.50 for Fig.49 The combined stereogram of the fluid connector and the main pipe shown in FIG. Fig.51 Observed from the length direction of the main pipe Fig.50 A cross-sectional view of the fluid connector and the main pipe is shown, Fig.52 When viewed from the width direction of the main pipe Fig.50 A cross-sectional view of the fluid connector and main piping is shown.

[0231] and, Fig.53 This is a cross-sectional view of the main pipe as viewed from the length direction of the main pipe. Fig.54 A top view of the main piping.

[0232] The fluid connector 300 of the third embodiment of the present invention may include a plug-in 310, a gasket 320, a locking nut 330, a sealing ring 340, etc. Different from the arrangement of the above-mentioned fluid connectors 100 and 200, the fluid connector 300 has a partially modified structure. The following briefly describes or omits the contents related to the same structures included in the fluid connectors 100, 200, and 300.

[0233] In the fluid connector 300, the portion 3d surrounding the combining hole corresponds to the surrounding area of ​​the combining hole 3b formed by punching a hole at the position for setting the branch pipe 2. In the overall area of ​​the wall of the main pipe 3 (hereinafter referred to as the "main pipe wall 3a"), after the blade portion 3e is formed by elastically deforming the portion 3d surrounding the combining hole, the blade portion 3e can be fixed by using the gasket 320 and the plug-in 310 to combine the corresponding fluid connector 300 with the combining hole 3b and seal the combining hole 3b.

[0234] In order to set the fluid connector 300, it is necessary to use a drilling machine or other perforating device to perform the following work first, and to perforate the main pipe wall 3a to form a coupling hole 3b for coupling the fluid connector 300. Preferably, the coupling hole 3b is formed by perforating along the thickness direction of the main pipe wall 3a, but it is not limited to this. In addition, the coupling hole 3b is preferably circular, but it is not limited to this.

[0235] For this reason, preferably, the main pipe 3 of the fluid connector 300 is made of a soft material to facilitate elastic deformation, and can be a pipe with a relatively thin thickness compared to the main pipe 1. For example, the main pipe 3 can be an elastic hose made of an elastically deformable elastic material such as PVC, rubber, etc. In this case, it is preferably a braided hose that can prevent the main pipe 3 from being torn or broken and buried in the wall, but it is not limited thereto.

[0236] As described above, the fluid connector 300 is preferably applied to the main pipe 3 made of a soft material, but is not limited thereto. For example, when the main pipe is made of a hard material, if the temperature of the installation location is high or the surrounding part of the coupling hole of the main pipe is heat-treated under high temperature conditions, the fluid connector 300 can be installed in the main pipe 3 made of a hard material in a use environment where the main pipe 3 is prone to elastic deformation.

[0237] On the other hand, the lock nut 330 and the seal ring 340 have the same structure as the lock nut 240 and the seal ring 250 of the fluid connector 200. Therefore, the description of the lock nut 330 and the seal ring 340 will be omitted.

[0238] Fig.55 A stereogram of the plug-in. Fig.56 for Fig.55 The main view of the plugin is shown, Fig.57 for Fig.55 A side view of the plug-in is shown. Fig.58 for Fig.55 A cross-sectional view of the insert is shown.

[0239] The plug-in 310 may include an plug-in body 311 , a first external thread 313 , an plug-in head 315 , a discharge hole 317 , a hook 318 , an O-ring 319 , and the like.

[0240] The plug body 311 is cylindrical and extends in the height direction of the fluid connector 300. The plug body 311 has a diameter that is larger than the diameter of the coupling hole 3b by a predetermined ratio.

[0241] The first external thread 313 is formed protrudingly on the outer peripheral surface of the plug-in body 311, and has an outer diameter that is larger than the diameter of the plug-in body 311 by a predetermined ratio. In particular, preferably, the first external thread 313 is spaced apart from the upper end and the lower end of the plug-in body 311 by a predetermined interval. The lower end of the plug-in body 311 refers to the end of the two side ends of the plug-in body 311 where the plug-in head 315 described below is formed, and the upper end of the plug-in body 311 refers to the end of the two side ends of the plug-in body 311 opposite to the above-mentioned lower end.

[0242] The first external thread 313 is formed with a guide groove 313a which is recessed along the height direction of the fluid connector 300 so that a guide block 321b of the gasket 320 described below can be movably inserted therein along the height direction of the fluid connector 300. The guide groove 313a will be described in detail later together with the guide block 321c.

[0243] The plug head 315 is formed at the lower end of the plug body 311 to be concentric with the plug body 311 and has a diameter that is a predetermined ratio larger than the outer diameter of the first external thread 313. Thus, the following relationship is formed between the coupling hole 3b, the plug body 311, the first external thread 313, and the plug head 315.

[0244] The diameter of the plug-in head 315>the outer diameter of the first external thread 313>the diameter of the plug-in body 311>the diameter of the coupling hole 3b

[0245] Furthermore, an insertion guide surface 315a is formed on the side of the plug-in head 315 to guide the plug-in head 315 so that the plug-in head 315 can be easily inserted into the coupling hole 3b. Preferably, the insertion guide surface 315a is an inclined structure whose diameter gradually decreases along the lower end side of the plug-in head 315, but is not limited thereto.

[0246] Furthermore, an inner pressurizing surface 315b is formed on the upper surface of the plug head 315, extending from the lower end of the plug body 311, with a height gradually decreasing from the center of the plug head 315 along the periphery and tilting downward. In particular, the tilt angle of the inner pressurizing surface 315b gradually decreases as it approaches the virtual center line C1 side that passes through the center point of the plug 310 along the length direction of the main pipe 3, and the tilt angle may gradually increase as it moves away from the center line C1. The plug head 315 formed with such an inner pressurizing surface 315b is a curved shape bent into an arch, and its curvature corresponds 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.

[0247] The inner pressurizing surface 315b is recessed to form an O-ring groove 315c into which an O-ring 319 can be inserted. Preferably, the height of the O-ring groove 315c gradually increases as it approaches the center line C1, and gradually decreases as it moves away from the center line C1, but the present invention is not limited thereto.

[0248] The discharge hole 317 is perforated in the interior of the plug 310 to penetrate the plug head 315 and the plug body 311 along the height direction of the fluid connector 300 .

[0249] The hook portion 318 is formed protrudingly on the side surface of the plug head portion 315 along the extension direction of the center line C1 of the plug head portion 315 (the length direction of the main pipe 3). Preferably, the hook portion 318 is formed at a predetermined height on the side surface of the plug head portion 315, and when inserted into the interior 3c of the main pipe 3 through the coupling hole 3b, it is spaced apart from the inner circumferential surface of the main pipe 3 by a predetermined distance.

[0250] The O-ring 319 is made of elastically deformable rubber or other materials and is inserted into the O-ring groove 315c. Preferably, the O-ring 319 has a thickness that is greater than the depth of the O-ring groove 315c by a predetermined ratio. Thus, when the O-ring 319 is inserted into the O-ring groove 315c, the O-ring 319 can protrude by a predetermined height compared to the inner pressurized surface 315b.

[0251] Fig.59 This is a three-dimensional view of the pad viewed from above. Fig.60 For viewing from the bottom Fig.59 A perspective view of the pad shown, Fig.61 Observed from the length direction of the main pipe Fig.59 A cross-sectional view of the liner shown, Fig.62 When viewed from the width direction of the main pipe Fig.59 A cross-sectional view of the gasket is shown.

[0252] Next, the gasket 320 is coupled to the insert head 315 and is a member for fixing the blade portion 3 e of the main pipe 3 in a predetermined manner.

[0253] The gasket 320 can be made of plastic or other materials and has rigidity to maintain its shape. When the plug-in 310 is threadedly coupled to the locking nut 330 , the gasket 320 will not be deformed due to the applied pressure.

[0254] During the process of threaded fastening of the locking nut 330 and the plug-in body 311, the gasket 320 can transfer the pressure applied from the locking nut 330 and the plug-in body 311 to the blade portion 3e along the circumferential direction and the length direction of the main pipe 3, except for the thickness direction of the main pipe 3, so that the blade portion 3e can be fixed in multiple directions. To this end, the gasket 320 may include a gasket body 321, a flange 322, etc.

[0255] The packing body 321 has a cylindrical shape having a diameter greater than that of the coupling hole 3 b by a predetermined ratio.

[0256] The gasket body 321 may include an insertion hole 321a, a guide block 321b, etc. The insertion hole 321a is formed in the central portion of the gasket body 321 so that the first external thread 313 and the blade portion 3e in contact with the first external thread 313 can be inserted therein, and the guide block 321b is protruded along the height direction of the fluid connector 300 and is formed on the inner circumferential surface of the insertion hole 321a.

[0257] The insertion hole 321a may include a first insertion hole 321c, a second insertion hole 321d, a third insertion hole 321e, etc. The first insertion hole 321c is formed at the lower part of the gasket 320, the second insertion hole 321d is formed at the center part of the gasket 320, and the lower end is connected to the upper end of the first insertion hole 321c, and the third insertion hole 321e is formed at the upper part of the gasket 320, and the lower end is connected to the upper end of the second insertion hole 321d.

[0258] Also, an inclined curved guide surface 321f and the like are formed on the inner circumferential surface of the first insertion hole 321c, so that the diameter of the corresponding first insertion hole 321c gradually increases along the lower end of the first insertion hole 321c.

[0259] Preferably, the curved guide surface 321f makes the lower end of the first insertion hole 321c with the largest diameter larger than the diameter of the plug head 315, and makes the upper end of the first insertion hole 321c with the smallest diameter larger than the outer diameter of the first external thread 313 and smaller than the diameter of the plug head 315, but is not limited thereto. In particular, the inclination angle of the curved guide surface 321f gradually increases as it moves away from the virtual center line C2 that passes through the center point of the gasket 320 along the length direction of the main pipe 3.

[0260] The formation position of the fixing protrusion 321g is not particularly limited. The fixing protrusion 321g can be protruded and formed in a specific area between the lower side corner 321h of the curved guide surface 321f where the curved guide surface 321f and the bottom surface of the flange 322 are in contact with each other, and the upper side corner 321i of the curved guide surface 321f where the curved guide surface 321f and the inner peripheral surface of the second insertion hole 321d are in contact with each other.

[0261] Furthermore, preferably, the upper corner 321i and the lower corner 321h of the curved guide surface 321f are rounded to prevent the blade portion 3e of the main pipe 3 from being damaged by being sharply bent by the curved guide surface 321f, but the present invention is not limited thereto.

[0262] The diameter of the second insertion hole 321d is the same as the upper end of the first insertion hole 321c, and the third insertion hole 321e has a diameter larger than the second insertion hole 321d by a predetermined ratio. Thus, the bottom surface of the third insertion hole 321e can be used as a placement surface 321j for placing the lower end of the locking nut 330.

[0263] The guide block 321b protrudes from the inner circumferential surface of the insertion hole 321a toward the center of the insertion hole 321a and extends along the height direction of the fluid connector 300. In addition, the guide block 321b has a width smaller than the guide groove 313a and can be inserted into the guide groove 313a of the first external thread 313 in a movable manner along the height direction of the fluid connector 300.

[0264] The flange 322 is connected to the lower end of the gasket body 321 and is extended from the lower end of the gasket body 321 .

[0265] Furthermore, the flange 322 is disc-shaped, has a diameter that is a predetermined proportion larger than the diameter of the gasket body 321, and is curved into an arch shape, and its curvature corresponds to the curvature of the main distribution pipe 3 based on the center line C2, so that the highest point of the maximum height is located on the center line C2.

[0266] Figures 63 to 75 This is a diagram for explaining a method of connecting a main pipe and a branch pipe using a fluid connector.

[0267] Hereinafter, a method of connecting the main pipe 3 and the branch pipe 2 using the fluid connector 300 will be described with reference to the accompanying drawings. As described above, the main pipe 3 is an elastic hose that can be elastically deformed. However, the elastic hose is usually stored in a compressed state, so the case of connecting the compressed main pipe 3 and the branch pipe 2 is described as an example.

[0268] First, the coupling hole 3 b is formed by punching a hole at a specific position of the main pipe 3 in a compressed state using a punching tool.

[0269] Next, under the guidance of the guide groove 313 a and the guide block 321 b , the gasket 320 is coupled to a portion of the plug body 311 located outside the main pipe 3 so that the plug body 311 is inserted into the insertion hole 321 a of the gasket 320 .

[0270] Subsequently, the lower end of the locking nut 330 is placed on the placement surface 321j of the gasket 320, and the locking nut 330 is rotated and tightened along the predetermined tightening direction through the first external thread 313 so that the locking nut 330 is located on the upper side of the gasket 320 and the locking nut 330 is separated from the plug-in head 315 by a predetermined interval, thereby combining the plug-in 310 with the locking nut 330.

[0271] Then, after the main pipe 3 is elastically deformed into a state close to a cylindrical shape in order to insert the hook 318 into the connecting hole 3b, the plug-in 310 is tilted at a specified angle so that the end of the hook 318 faces the connecting hole 3b, and the hook 318 is inserted into the interior 3c of the main pipe 3 through the connecting hole 3b.

[0272] Next, as the hook portion 318 is locked on the inner circumferential surface of the main distribution pipe 3, in this state, the plug-in head portion 315 is pressed along the inner 3c side of the main distribution pipe 3 by the lever principle, and the plug-in head portion 315 and the lower portion of the plug-in body 311 connected to the plug-in head portion 315 are inserted into the inner 3c of the coupling hole 3b. At the same time, the blade portion 3e is formed on the surrounding portion 3d of the coupling hole to face the inner 3c of the main distribution pipe 3.

[0273] Subsequently, the locking nut 330 is rotated in the tightening direction to be permanently coupled to the insert body 311 until the blade portion 3 e is interposed between the curved guide surface 321 f of the gasket 320 and the O-ring 319 of the insert head 315 .

[0274] As described above, during the permanent combination of the locking nut 330 and the plug body 311, as the blade portion 3e is sequentially pressurized in the + height direction of the main pipe 3 by the first external thread 313 and the O-ring 319 of the plug 310, it is bent according to the inclination angle of the bending guide surface 321f and the inner pressure surface 315b while being reversed up and down toward the outside of the main pipe 3. In particular, the blade portion 3e is first bent to a predetermined first angle with the lower side corner 321h of the bending guide surface 321f as a reference, and is second bent to a second angle with the upper side corner 321i of the bending guide surface 321f as a reference compared to the first angle. In this regard, the blade portion 3e can be divided into a first blade portion 3f and a second blade portion 3g, wherein the first blade portion 3f constitutes the lower part of the corresponding blade portion 3e and is inclined at the first angle, and the lower end of the second blade portion 3g is connected to the upper end of the first blade portion 3f and constitutes the upper part of the corresponding blade portion 3e and is inclined at the second angle. Thus, a two-stage sealing structure using the first blade portion 3f and the second blade portion 3g can be formed. In addition, the fixing protrusion 321g can press the first blade portion 3f to fix the first blade portion 3f, and the O-ring 319 can be closely attached to the inner circumference of the first blade portion 3f and seal the coupling hole 3b.

[0275] As described above, if the blade portion 3e is reversed upside down, the gasket 320 and the plug body 311 can press and fix the main pipe wall 3a in at least one direction of the circumferential direction and the length direction in addition to the thickness direction of the main pipe 3, so that the plug 310 can be combined with the main pipe 3 in a state where the discharge hole 317 is connected to the inner part 3c of the main pipe 3. In addition, the gasket 320 and the plug body 311 seal the combination hole 3b, which can prevent water flowing along the main pipe 3 from flowing out to the outside through the combination hole 3b.

[0276] Then, the branch pipe 2 is coupled to the lock nut 330 .

[0277] In the above-mentioned fluid connector 300, since the blade portion 3e protruding at a specified height along the outer side of the main pipe 3 is fixedly set on the fluid connector 300, even if the connecting hole 3b of the main pipe 3 is an elliptical shape or other uneven shapes, the fluid connector 300 can be stably connected to the main pipe 3. Considering the elevation difference in the connecting hole 3b caused by the curvature of the main pipe 3, compared with the existing fluid connector that needs to minimize the diameter of the connecting hole 3b, the diameter of the connecting hole 3b, the diameter of the plug-in 310 set in the connecting hole 3b, and the diameter of the discharge hole 317 formed in the plug-in 310 can be expanded.

[0278] Furthermore, in the fluid connector 300, in order to enable the inner pressure surface 315b of the plug-in head 315, the curved guide surface 321f of the gasket 320 and the flange 322 to uniformly apply pressure to the blade portion 3e and the main pipe wall 3a without considering the pressurizing direction, the inner pressure surface 315b of the plug-in head 315, the curved guide surface 321f of the gasket 320 and the flange 322 are formed into an arch structure and a curved surface structure having a curvature corresponding to the curvature of the main pipe 3, thereby preventing the fluid connector 300 from detaching from the coupling hole 3b due to uneven coupling force between the pressurizing directions.

[0279] Fig.76 FIG. 2 is a diagram showing a separation state of a fluid connector and a fluid source according to a fourth embodiment of the present invention. Fig.77 To show Fig.76 FIG. 1 is a diagram showing a state in which the fluid connector is combined with a fluid source, Fig.78 and Fig.79 A diagram for explaining a method of forming a coupling hole by punching a hole in a fluid source wall.

[0280] The fluid connector 400 of the fourth embodiment of the present invention is a device for connecting a fluid source 4 and a fluid guide component. Fig.76 and Fig.77 The fluid connector 400 may include a plug-in 410, an elastic bushing 420, a gasket 430, a locking nut 440, etc. The fluid connector 400 has a partially modified structure so that it can be set in a fluid source 4 such as a water storage tank. In the following, the contents related to the same structures included in the fluid connectors 100, 200, 300, and 400 are briefly described or omitted.

[0281] The fluid source 4 refers to a device and facility for receiving water and other various fluids (hereinafter referred to as "fluid"). The device and facility that can be used as the above-mentioned fluid source is not particularly limited in type, and the fluid source may include various devices and facilities set up in various places such as agricultural sites, commercial sites, industrial sites, and homes for receiving fluids according to the purpose of storing, supplying, transferring, and collecting water, such as tanks, barrels, pipes, piping, water collection tanks, sinks, washbasins, etc.

[0282] The fluid guiding component refers to a component that guides the fluid transferred from the fluid source 4 in a predetermined manner. The component that can be used as such a fluid guiding component is not limited in type, and the fluid guiding component can be at least one of a plurality of components that can guide the fluid transferred from the fluid source 4 in a plurality of ways such as transfer, branching, drainage, and injection, for example, a pipe, a branch pipe, a faucet, a valve, a nozzle, etc.

[0283] On the other hand, in the fluid source, the fluid connector 400 can be set on the wall of the fluid source 4 (hereinafter referred to as "fluid source wall 4a") made of high rigidity material such as hard plastic and metal and having a thickness greater than a predetermined reference.

[0284] Furthermore, the fluid connector 400 can be combined with the combination hole 4b formed by perforation in the fluid source wall 4a, so that the inside of the fluid source 4 is connected with the outside. In this regard, in order to set the fluid connector 400, it is necessary to use a drilling machine or other perforating device to preferentially perform the following work, and perforate the main distribution pipe wall 4a to form a combination hole 4b for combining the fluid connector 400. Preferably, the combination hole 4b is formed by perforating along the thickness direction of the main distribution pipe wall 4a, but it is not limited to this. Moreover, the combination hole 4b is preferably circular, but it is not limited to this. Moreover, preferably, the combination hole 4b is formed in an area of ​​the fluid source wall 4a having a planar structure, but it is not limited to this.

[0285] Hereinafter, the fluid connector 400 is described based on the circular coupling hole 4b formed by punching along the thickness direction of the fluid source wall 4a. In addition, in the entire area of ​​the fluid source wall 4a, the surrounding area surrounding the coupling hole 4b is referred to as the coupling hole surrounding portion 4c, the boundary portion connecting the inner side surface of the coupling hole surrounding portion 4c with the inner peripheral surface of the coupling hole 4b is referred to as the inner side corner 4d of the coupling hole 4b, and the boundary portion connecting the outer side surface of the coupling hole surrounding surface 4c with the inner peripheral surface of the coupling hole 4b is referred to as the outer side corner 4e of the coupling hole 4b.

[0286] Fig.80 This is the main view of the plugin. Fig.81 is a cross-sectional view of the plug-in. Fig.82 A top view of the plug-in.

[0287] The plug-in 410 is a component used to connect the fluid source 4 and the fluid guiding component, so that the fluid contained in the fluid source 4 can be transferred to the fluid guiding component.

[0288] Such an insert 410 may include an insert body 411 , an insert head 413 , a discharge hole 415 , and the like.

[0289] The plug body 411 has a cylindrical shape and extends in the height direction of the fluid connector 400. Also, the plug body 411 has a diameter that is smaller than the diameter of the coupling hole 4b by a predetermined ratio.

[0290] The plug-in body 411 includes a first external thread 411a protruding from the outer peripheral surface. In particular, preferably, the first external thread 411a is spaced apart from the upper end and the lower end of the plug-in body 411 by a predetermined interval. The lower end of the plug-in body 411 refers to the end of the two side ends of the plug-in body 411 where the plug-in head 413 described below is formed, and the upper end of the plug-in body 411 refers to the end of the two side ends of the plug-in body 411 opposite to the above-mentioned lower end.

[0291] Furthermore, the first external thread 411a has an outer diameter that is a predetermined ratio larger than the diameter of the plug-in body 411 and a predetermined ratio smaller than the diameter of the coupling hole 4b. That is, when the worker performs the punching work of the coupling hole 4b, the coupling hole 4b should be punched according to a diameter that is a predetermined ratio larger than the outer diameter of the first external thread 411a to form the coupling hole 4b.

[0292] The first external thread 411 a may be formed with a guide groove 411 b and may be recessed along the height direction of the fluid connector 400 so that a guide block 432 of a gasket 430 described below can be movably inserted therein.

[0293] The plug head 413 is extended from the lower end of the plug body 411 and is concentric with the plug body 411. The plug head 413 has a diameter that is larger than the diameter of the first external thread 411a by a predetermined ratio and is the same as or smaller than the diameter of the coupling hole 4b by a predetermined ratio.

[0294] In addition, an inner pressurizing surface 413a is formed on the upper surface of the plug head 413, and when the fluid source 4 is provided with the fluid connector 400, it extends from the lower end of the plug body 411 to face the inner sealing portion 427 of the elastic bushing 420 described below, and the height gradually decreases from the center of the plug 410 along the periphery and is inclined downward. Preferably, the inclination angle of the inner pressurizing surface 413a gradually decreases along the lower end of the plug head 413, but is not limited thereto.

[0295] The discharge hole 415 is formed through-hole inside the plug 410 to penetrate the plug head 413 and the plug body 411 along the height direction of the fluid connector 400 .

[0296] Fig.83 This is the main view of the elastic bushing. Fig.84 is a cross-sectional view of the elastic bushing. Fig.85 A top view of the elastic bushing.

[0297] During the process of combining the fluid connector 400 with the combining hole 4 b , the elastic bushing 420 refers to a component used to seal between the inner circumferential surface of the combining hole 4 b and the fluid connector 400 .

[0298] The elastic bushing 420 is made of an elastically deformable material. For example, the elastic bushing 420 may be made of a rubber material.

[0299] Furthermore, in addition to the thickness direction, the elastic bushing 420 can also fix the fluid source wall 4a along the surface direction. To this end, the elastic bushing 420 can include a coupling portion 422, a locking portion 424, an insertion hole 426, and the like.

[0300] The coupling portion 422 can simultaneously apply pressure to the inner corner 4d and the outer corner 4e of the coupling hole 4b along the thickness direction and the surface direction of the fluid source wall 4a. To this end, the coupling portion 422 has a length that is greater than the thickness of the fluid source wall 4a or the depth of the coupling hole 4b by a predetermined ratio, so that the lower portion passes through the coupling hole 4b by a predetermined length and protrudes inside the fluid source 4.

[0301] The shape of the coupling part 422 is not particularly limited. For example, the coupling part 422 may be cylindrical and have a diameter that is the same as the diameter of the coupling hole 4b or a predetermined ratio smaller than the diameter of the coupling hole 4b. In particular, in order to easily insert the coupling part 422 into the coupling hole 4b, preferably, the lower outer peripheral surface of the coupling part 422 is an inclined surface in which the diameter of the coupling part 422 gradually narrows along the lower end of the coupling part 422, but it is not limited thereto.

[0302] When the plug 410 is threadedly coupled with the locking nut 440, the locking portion 424 is elastically deformed due to the applied pressure and can be locked and tightly attached to the outer side of the peripheral portion 4c of the coupling hole. For example, the locking portion 424 is in the shape of a disk, extending from the upper end of the coupling portion 422, forming a concentric relationship with the coupling portion 422, and having a diameter that is larger than the diameter of the coupling hole 4b by a predetermined ratio.

[0303] The insertion hole 426 is concentric with the coupling portion 422 and the locking portion 424 , and penetrates the coupling portion 422 and the locking portion 424 along the height direction of the fluid connector 400 .

[0304] Such insertion holes 426 may include a first insertion hole 426a, a second insertion hole 426b, a third insertion hole 426c, and the like.

[0305] The first insertion hole 426a is located at the lower part of the insertion hole 426. More specifically, the first insertion hole 426a is formed through the lower part of the coupling portion 422. Such a first insertion hole 426a has a diameter that is the same as the diameter of the plug-in body 411 or is larger by a predetermined ratio than the diameter of the plug-in body 411 and is smaller by a predetermined ratio than the outer diameter of the first external thread 411a, so that the lower end of the plug-in body 411 without the first external thread 411a is inserted therein.

[0306] Furthermore, a curved guide surface 426 f is formed at a lower portion of the inner peripheral surface of the first insertion hole 426 .

[0307] The second insertion hole 426b is formed by extending from the upper end of the first insertion hole 426a to be located on the upper side of the first insertion hole 426a and connected to the first insertion hole 426a. More specifically, the second insertion hole 426b passes through the upper part of the coupling portion 422 and the lower part of the locking portion 424. Such a second insertion hole 426b has a diameter that is the same as the outer diameter of the first external thread 411a or a predetermined ratio larger than the outer diameter of the first external thread 411a, so that the first external thread 411a can be inserted therein. Thus, 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 external thread 411a, and hereinafter, the bottom surface of the second insertion hole 426b is referred to as a support surface 426d. Preferably, such a support surface 426d is an inclined surface whose height gradually decreases along the center of the elastic bushing 420 and is inclined downward. Thus, when the plug-in body 411 is slightly tilted, the first external thread 411 a and the supporting surface 426 d can maintain line contact.

[0308] The third insertion hole 426c is located on the upper side of the second insertion hole 426b, connected to the second insertion hole 426b, and extended from the upper end of the second insertion hole 426b. More specifically, the third insertion hole 426c is formed through the upper part of the locking portion 424. This third insertion hole 426c has a diameter that is larger than the second insertion hole 426b by a predetermined proportion. Thus, the third insertion hole 426c and the second insertion hole 426b can be connected to form a stepped structure. In this case, the inner circumferential surface and the bottom surface of the third insertion hole 426c are connected to the alignment protrusion 433 of the gasket 430 described below, and when the elastic bushing 420 is aligned in a predetermined manner, it can be used as an alignment groove 426e that performs an auxiliary function to enable the specified elastic deformation to be achieved.

[0309] As described above, with the provision of the elastic bushing 420, the lower portion of the coupling portion 422 having the first insertion hole 426a formed therein is elastically deformed due to the pressure applied when the plug 410 and the lock nut 440 are threadedly coupled and is closely attached to the inner corner 4d of the coupling hole 4b, and can be used as the inner sealing portion 427. In this regard, preferably, the first insertion hole 426a has a depth greater than a predetermined reference, so that the fluid connector 400 can be applied to a variety of fluid sources 4 having different thicknesses of the fluid source wall 4a. In addition, the upper portion of the coupling portion 422 having the second insertion hole 426b formed therein is elastically deformed due to the pressure applied when the plug 410 and the lock nut 440 are threadedly coupled, and the boundary portion connected to the locking portion 424 is closely attached to the outer corner 4e of the coupling hole 4b, and can be used as the outer sealing portion 428. The inner sealing portion 427 and the outer sealing portion 428 will be described in further detail later.

[0310] Fig.86 is the main view of the pad, Fig.87 is a cross-sectional view of the gasket. Fig.88 A top view of the pad.

[0311] When the insert 410 is threadedly coupled to the locking nut 440 , the gasket 430 refers to a component that converts the applied pressure in a predetermined manner to pressurize the elastic bushing 420 .

[0312] Furthermore, the gasket 430 may be made of plastic or other materials and have rigidity to maintain a shape. When the plug-in 410 is threadedly coupled to the locking nut 440 , the gasket 430 will not be deformed due to the applied pressure.

[0313] The gasket 430 is in the shape of a disk and has a diameter that is larger than the diameter of the coupling hole 4b by a predetermined ratio. The gasket 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, and the like.

[0314] The insertion hole 431 is formed through the center of the gasket 430 along the height direction of the fluid connector 400, so that the plug-in body 411 and the first external thread 411a can be inserted therein in a movable manner. And. The insertion hole 431 may include: a first insertion hole 431a, formed in the lower part of the gasket 430, so that the first external thread 411a can be inserted therein in a movable manner, having a diameter that is the same as the outer diameter of the first external thread 411a and is larger than the outer diameter of the first external thread 411a by a predetermined ratio; and a second insertion hole 431b, the lower end of which is connected to the upper end of the first insertion hole 431a, formed in the upper part of the gasket 430, and having a second insertion hole 431b with a diameter larger than the first insertion hole 431a by a predetermined ratio. As described above, if the first insertion hole 431a and the second insertion hole 431b are formed, the second insertion hole 431b is connected to the first insertion hole 431a to form a stepped structure, thereby, the bottom surface of the second insertion hole 431b can be used as a placement surface 431c for placing the lower end of the locking nut 440.

[0315] The guide block 432 protrudes from the inner circumferential surface of the insertion hole 431 toward the center of the insertion hole 431 and extends along the height direction of the fluid connector 400. In addition, the guide block 432 has a width smaller than the guide groove 411b and can be inserted into the guide groove 411b of the first external thread 411a in a movable manner along the height direction of the fluid connector 400.

[0316] In the case where the fluid source 4 is provided with the fluid connector 400, the alignment protrusion 433 is formed on the bottom surface of the gasket 430 along the periphery of the first insertion hole 431a so as to be inserted into the alignment groove 426e of the elastic bushing 420. Preferably, the alignment protrusion 433 is annular, but not limited thereto. When the fluid connector 400 is provided in the fluid source 4, such an alignment protrusion 433 is inserted along the -thickness direction of the fluid source wall 4a (in other words, the -height direction of the fluid source wall 4a) and presses the elastic bushing 420 in a predetermined manner, which can assist the joint 422 and the elastic bushing 420 including it to produce a predetermined elastic deformation in a predetermined manner.

[0317] The outer pressure surface 434 is formed on the bottom surface of the gasket 430 along the periphery of the alignment protrusion 433, and when the fluid source 4 is provided with the fluid connector 400, the outer sealing portion 428 of the elastic bushing 420 faces the outer corner 4e of the coupling hole 4b. In addition, the outer pressure surface 434 is annular, and constitutes an upwardly inclined surface whose height gradually increases from the center of the gasket 430 along the periphery. The inclination angle of the outer pressure surface 434 is not particularly limited. For example, the inclination angle of the outer pressure surface 434 can be 45°.

[0318] The locking portion pressurizing surface 435 is formed on the bottom surface of the gasket 430 along the periphery of the outer pressurizing surface 434, and faces the locking portion 424 of the elastic bushing 420 when the fluid source 4 is provided with the fluid connector 400. The locking portion pressurizing surface 435 is in the shape of an annular disk, and has a depth that is smaller than the thickness of the locking portion 424 by a predetermined ratio. Thus, the locking portion pressurizing surface 435 can pressurize the locking portion 424 of the elastic bushing 420, so that it is closely attached to the outer side surface of the surrounding portion 4c of the coupling hole.

[0319] The fixing protrusion 436 is formed on the bottom surface of the gasket 430 along the periphery of the locking portion pressurizing surface 435. When the fluid source 4 is provided with a fluid connector 400, the fixing protrusion 436 is more opposite to the outer side surface of the fluid source wall 4a which is a predetermined distance away from the coupling hole 4b than the surrounding portion 4c of the coupling hole. In addition, the fixing protrusion 436 is annular, and its outer diameter is larger than the outer diameter of the locking portion 424. When the fluid source 4 is provided with a fluid connector 400, the fixing protrusion 436 can apply pressure to the outer side surface of the fluid source wall 4a. Thus, the fixing protrusion 436 is closely attached to the outer side surface of the fluid source wall 4a, and friction force can be applied between the corresponding fixing protrusion 436 and the fluid source wall 4a to fix the fluid connector 400 and prevent it from being separated from the fluid source 4.

[0320] Fig.89 This is the front view of the locking nut. Fig.90 is a cross-sectional view of the locking nut. Fig.91 A top view of the locking nut.

[0321] Next, in the process of combining the elastic bushing 420 with the combining hole 4 b , the locking nut 440 is a component that combines the fluid guide component with the fluid connector 4 .

[0322] Preferably, the locking nut 440 is cylindrical and extends along the height direction of the fluid connector 400 , but is not limited thereto.

[0323] Such a locking nut 440 may include a connecting hole 442 which is formed by punching along the height direction of the fluid connector 400 and into which the plug-in body 411 may be inserted.

[0324] An internal thread 442a is formed on the inner circumferential surface of the connection hole 442, which can be threadedly engaged with the first external thread 411a of the plug-in body 411. In this regard, when the upper end of the first external thread 411a is threadedly engaged with the lower end of the internal thread 442a, if the locking nut 440 is rotated along the tightening direction by the first external thread 411a, the locking nut 440 descends and the plug-in 410 ascends. Thus, the locking nut 440 can be gradually engaged with the plug-in 410 by rotating the locking nut 440 along the tightening direction by the first external thread 411a and gradually inserting the plug-in body 411 into the connection hole 442.

[0325] Furthermore, when the first external thread 411a and the internal thread 442a are threadedly engaged, if the locking nut 440 is rotated in a loosening direction opposite to the tightening direction by the first external thread 411a, the locking nut 440 rises and the plug-in 410 falls. Thus, the locking nut 440 can be gradually separated from the plug-in 410 by rotating the locking nut 440 in the loosening direction by the first external thread 411a and gradually drawing the plug-in body 411 out of the connecting hole 442.

[0326] Figure 92 to Figure 95 A diagram for explaining a method of placing a fluid connector at a fluid source. Fig.96 A diagram for explaining the principle of fixing the wall of the fluid source with an elastic bushing.

[0327] As described above, the fluid source 4 and the fluid guide component can have various structures according to their respective uses. Hereinafter, the method of connecting the fluid source 4 and the fluid guide component using the fluid connector 400 will be described by taking the case where the fluid source 4 is a water storage tank for storing water and the fluid guide component is the branch pipe 2 as an example.

[0328] First, a punching tool is used to punch holes in the fluid source wall 4a to form the combining holes 4b.

[0329] Next, the insert body 411 and the first external thread 411 a are inserted into the insertion hole 426 to combine the insert 410 with the elastic bushing 420 , so that the lower end of the first external thread 411 a of the insert 410 is supported by the support surface 426 d of the elastic bushing 420 .

[0330] Subsequently, under the guidance of the guide groove 411 b and the guide block 432 , the insert body 411 is inserted into the insertion hole 431 of the bushing 430 to combine the insert 410 with the gasket 430 , so that the gasket 430 is located on the upper side of the elastic bushing 420 .

[0331] Then, with the upper end of the first external thread 411a of the plug-in body 411 hung on the lower end of the internal thread 442a of the locking nut 440, the plug-in 410 and the locking nut 440 are temporarily combined by rotating the locking nut 440 along a predetermined tightening direction through the first external thread 411a, so that the locking nut 440 is located on the upper side of the gasket 430 and separated from the plug-in head 413 by a predetermined interval.

[0332] In a state where the upper end of the first external thread 411a is hung on the lower end of the internal thread 442a, if the locking nut 440 is rotated and tightened by the first external thread 411a, as the plug 410 rises and the locking nut 440 falls, the interval between the plug head 413 and the locking nut 440 gradually decreases, and thus the plug body 411 is gradually inserted into the connecting hole 442 through the lower opening of the locking nut 440, and the interval between the plug head 413, the elastic bushing 420, the gasket 430 and the locking nut 440 gradually decreases. In this regard, as the plug head 413, the elastic bushing 420, the gasket 430 and the locking nut 440 are closely attached to each other, when the locking nut 440 is further tightened, the plug head 413 presses the elastic bushing 420 in the +thickness direction, and the locking nut 440 presses the gasket 430 in the -thickness direction. Furthermore, the gasket 430 presses the elastic bushing 420 in the thickness direction by the pressure applied from the lock nut 440. In this case, the elastic bushing 420 can be elastically deformed by receiving the pressure of the insert head 413 and the gasket 430 in both the up and down directions.

[0333] However, before inserting the plug 4 through the coupling hole 4b into the fluid source 4, if the coupling portion 422 of the elastic bushing 420 is elastically deformed in advance, the fluid source wall 4a can be fixed by the elastic bushing 420. Thus, the plug 410 and the locking nut 440 can be temporarily coupled by tightening the locking nut 440 in such a manner that the elastic bushing 420 maintains its original shape without elastic deformation until the plug head 413 and the locking nut 440 are spaced apart by a predetermined distance.

[0334] Next, the locking portion 424 of the elastic bushing 420 is locked on the outer side surface of the portion 4c surrounding the coupling hole, and the outer sealing portion 428 of the elastic bushing 420 faces the outer corner 4e of the coupling hole 4b. The lower portion of the plug-in 410 including the lower portion of the first external thread 411a in the plug-in head 413 and the coupling portion 422 of the elastic bushing 420 are selectively inserted into the coupling hole 4b, so that the plug-in head 413 and the inner sealing portion 427 of the elastic bushing 420 protrude and form inside the fluid source 4.

[0335] Subsequently, the first external thread 411a of the plug 410 is rotated along the tightening direction to tighten the locking nut 440 so that the plug 410 is permanently combined with the locking nut 440, so that the elastic bushing 420 is elastically deformed into a shape capable of fixing the fluid source wall 4a due to the pressure applied from the locking nut 440 and the plug 410.

[0336] The permanent combination of the plug-in 410 and the locking nut 440 can be implemented in the following manner, that is, after the locking nut 440 is tightened for the first time in such a way that the plug-in head 413, the elastic bushing 420, the gasket 430 and the locking nut 440 are tightly attached to each other, the locking nut 440 is tightened for the second time until the elastic bushing 420 is elastically deformed into a predetermined shape by being bidirectionally pressurized (+thickness direction, -thickness direction) by the plug-in head 413 and the gasket 430.

[0337] More specifically, if the plug-in 410 is permanently combined with the locking nut 440, the alignment protrusion 433 of the gasket 430 is inserted into the alignment groove 426e of the elastic bushing 420. As the elastic bushing 420 is pressed along the -thickness direction of the fluid source wall 4a, the elastic bushing 420 will be aligned according to a predetermined setting method. The pressure surface 435 of the locking portion of the gasket 430 presses the locking portion 424 along the -thickness direction of the fluid source wall 4a, so that it is tightly attached to the outer side surface of the portion 4c around the combining hole, and the fixing protrusion 436 of the gasket 430 presses the outer side surface of the fluid source wall 4a, thereby fixing the fluid connector 400 to the fluid source 4.

[0338] Furthermore, the outer pressure surface 434 of the gasket 430 applies pressure to the outer sealing portion 428 of the elastic bushing 420 in the -thickness direction and the surface direction of the fluid source wall 4a through the above-mentioned inclined structure. In this case, as the outer sealing portion 428 is elastically deformed according to the shape of the outer corner 4e, the outer corner 4e can be pressed in the -thickness direction and the surface direction. Correspondingly, the inner pressure surface 413a of the plug-in head 413 applies pressure to the inner sealing portion 427 of the elastic bushing 420 in the +thickness direction and the surface direction of the fluid source wall 4a through the above-mentioned inclined structure. As a result, as the inner sealing portion 427 is elastically deformed according to the shape of the inner corner 4d, the inner corner 4d can be pressed in the +thickness direction and the surface direction.

[0339] As described above, as the elastic bushing 420 elastically deforms, the elastic bushing 420 can simultaneously fix the inner corner 4d and the outer corner 4e of the coupling hole 4b along the thickness direction and the surface direction of the fluid source wall 4a, thereby, the elastic bushing 420 and the fluid connector 400 including it can be combined with the fluid source 4.

[0340] Then, the fluid guiding component is coupled to the locking nut 440 .

[0341] For example, when the fluid source 4 is a water storage tank and the fluid guiding component is a branch pipe 2, the second external thread 2c of the branch pipe 2 is threadedly coupled with the internal thread 442a of the connecting hole 442 of the locking nut 440, thereby connecting the water storage tank and the branch pipe 2 using the fluid connector 400.

[0342] As described above, if the branch pipe 2 is combined with the locking nut 440, the water storage tank and the branch pipe 2 are connected through the discharge hole 415 of the plug 410. Thus, the water discharged from the water storage tank is transferred to the branch pipe 2 through the discharge hole 415 of the plug 410, and the branch pipe 2 can transfer the water transferred from the water storage tank to the demand point.

[0343] The above-mentioned fluid connector 400 is formed by perforation in the entire area of ​​the combining hole 4b of the fluid source 4, which not only maintains the contact state between the inner corner 4d and the outer corner 4e of the combining hole 4b and the inner sealing part 427 and the outer sealing part 428 of the elastic bushing 420, but also enables the inner sealing part 427 and the outer sealing part 428 to simultaneously apply pressure to the inner corner 4d and the outer corner 4e in the thickness direction and the surface direction of the fluid source wall 4a.

[0344] Thus, the fluid connector 400 can fix the inner corner 4d and the outer corner 4e of the coupling hole 4b in the thickness direction and the surface direction through the elastic bushing 420. In addition to the thickness direction, the fluid source wall 4a can also be fixed in the surface direction through the elastic bushing 420 along the direction in which the fluid source wall 4a expands due to the high pressure of the fluid. By using this fluid connector 400, it is possible to prevent the elastic bushing 420 and the fluid connector 400 including the same from being separated from the coupling hole 4b or to prevent a gap from being generated between the outer circumference of the elastic bushing 420 and the inner circumference of the coupling hole 4b where the fluid may flow out.

[0345] On the other hand, under normal circumstances, the thickness of the fluid source wall 4a is smaller than the area, and the surface rigidity of the fluid source wall is greater than the thickness rigidity. However, the existing fluid connector adopts a method of applying external force to the fluid source wall only along the thickness direction. Therefore, in the process of setting and using the corresponding fluid connector, the existing fluid connector frequently causes the fluid source wall to be deformed or damaged due to the external force applied to the fluid source wall by the corresponding fluid connector.

[0346] In contrast, the fluid connector 400 of the present invention adopts a method of distributing the pressure transmitted from the plug 410 and the locking nut 440 along the thickness direction and the surface direction of the fluid source wall 4a and applying it to the inner corner 4d and the outer corner 4e of the coupling hole 4b. Therefore, during the process of setting and using the corresponding fluid connector 400, the fluid connector 400 can prevent the fluid source wall 4a from being deformed or damaged due to the external force applied to the fluid source wall 4a by the corresponding fluid connector 400.

[0347] Furthermore, if the locking nut 440 is tightened on the outside of the fluid source 4, the fluid connector 400 can apply pressure to the fluid source wall 4a in both the inner and outer directions through the elastic bushing 420. Thus, the fluid connector 400 can provide convenience in terms of installation or recovery, and the fluid connector 400 can be installed by simply operating the fluid connector 400 on the outer side of the fluid source 4 with a tool, without having to operate the fluid connector 400 on both the inner and outer sides of the fluid source 4 with a tool.

[0348] Fig.97 FIG. 2 is a diagram showing a separation state of a fluid connector and a fluid source according to a fifth embodiment of the present invention. Fig.98 To show Fig.97 FIG. 1 is a diagram showing a state in which the fluid connector is combined with a fluid source, Fig.99 and Fig.100 A diagram for explaining a method of forming a coupling hole by punching a hole in a fluid source wall.

[0349] Reference Fig.97 and Fig.98 The fluid connector 500 of the fifth embodiment of the present invention is a device for connecting the fluid source 5 with the above-mentioned fluid guide component, and may include a plug 510, a gasket 520, a locking nut 530, etc. Different from the arrangement of the above-mentioned fluid connector 400, this fluid connector 500 has a partially modified structure so that it can be arranged on the fluid source 5. In the following, the contents related to the same structure as the fluid connectors 100, 200, 300, and 400 are briefly described or omitted.

[0350] The difference between this fluid connector 500 and the above-mentioned fluid connector 400 of the fourth embodiment of the present invention at the structural level is that after the fluid source wall 5a made of elastically deformable elastic material such as PVC and rubber forms the blade portion 5d, the corresponding fluid connector 500 can be set by fixing the above-mentioned blade portion 5d using a plug-in 510 and a gasket 520.

[0351] In particular, preferably, the fluid connector 500 is applied to a fluid source 5 having a woven structure embedded in a fluid source wall 5 a to prevent the fluid source wall 5 a from being torn or broken, but is not limited thereto.

[0352] Hereinafter, the fluid connector 500 of the fifth embodiment of the present invention will be described in detail based on the contents related to the above-mentioned differences, however, the contents related to the same structures included in the fluid connector 400 of the fourth embodiment of the present invention and the fluid connector 500 of the fifth embodiment of the present invention will be briefly described or omitted.

[0353] This fluid connector 500 is combined with the combination hole 5b formed by perforating the fluid source wall 5a, so that the inside and outside of the fluid source 5 are connected. In this regard, in order to set the fluid connector 500, it is necessary to preferentially perform the following work, that is, using a drill or other perforating tool to perforate the fluid source wall 5a to form a combination hole 5b for combining the fluid connector 500. Preferably, the combination hole 5b is perforated along the thickness direction of the fluid source wall 5a, but it is not limited to this. In addition, the combination hole 5b is preferably circular, but it is not limited to this. In addition, preferably, the combination hole 5b is formed in an area of ​​the fluid source wall 5a having a planar structure, but it is not limited to this.

[0354] The fluid connector 500 is described below based on the case where the circular coupling hole 5b is formed by punching the fluid source wall 5a in the thickness direction. The surrounding area of ​​the coupling hole 5b in the entire fluid source wall 5a is referred to as the coupling hole surrounding portion 5c.

[0355] Fig.101 This is the main view of the plugin. Fig.102 This is a top view of the plug-in. Fig.103 This is a diagram showing a state where an inner pressurizing surface is formed on the insert head.

[0356] The plug-in unit 510 refers to a component used to sequentially connect the fluid source 5, the fluid connector 500, and the fluid guiding component.

[0357] Such an insert 510 may include an insert body 511 , an insert head 513 , a discharge hole 515 , a hook 517 , an O-ring 519 , and the like.

[0358] The plug body 511 is cylindrical and extends along the height direction of the fluid connector 500. In addition, preferably, the plug body 511 has a diameter that is larger than the diameter of the coupling hole 5b by a predetermined ratio, but is not limited thereto.

[0359] The plug-in body 511 includes a first external thread 511a protruding from the outer peripheral surface. The first external thread 511a has a diameter that is larger than the diameter of the plug-in body 511 by a predetermined ratio. In particular, preferably, the first external thread 511a is separated from the upper end and the lower end of the plug-in body 511 by a predetermined interval. The lower end of the plug-in body 511 refers to the end of the two side ends of the plug-in body 511 where the plug-in head 513 described below is formed, and the upper end of the plug-in body 511 refers to the end of the two side ends of the plug-in body 511 opposite to the above-mentioned lower end.

[0360] The first external thread 511a is formed with a guide groove 511b which is recessed along the height direction of the fluid connector 500 so that a guide block 524 of the gasket 520 described below can be movably inserted therein. The guide groove 511b will be described in detail together with the guide block 524 later.

[0361] The plug-in head 513 is formed at the lower end of the plug-in body 511 and is concentric with the plug-in body 511. The plug-in head 513 has a diameter that is larger than the outer diameter of the first external thread 511a by a predetermined ratio. Thus, the following relationship is formed between the coupling hole 5b, the plug-in body 511, the first external thread 511a, and the plug-in head 513.

[0362] The diameter of the plug-in head 513>the outer diameter of the first external thread 511a>the diameter of the plug-in body 511>the diameter of the coupling hole 5b

[0363] Furthermore, an insertion guide surface 513a is formed on the side of the plug-in head 513 to guide the plug-in head 513 so that the plug-in head 513 can be easily inserted into the coupling hole 5b. Preferably, the insertion guide surface 513a is an inclined structure whose diameter gradually decreases along the lower end side of the plug-in head 513, but is not limited thereto.

[0364] In addition, an inner pressurizing surface 513b is formed on the upper surface of the plug-in head 513, and the height gradually decreases from the center of the plug-in 510 along the periphery and is inclined downward. An O-ring groove 513c into which the O-ring 519 can be inserted is formed in a recessed manner on the inner pressurizing surface 513b. Preferably, the O-ring groove 513c is formed at the center of the inner pressurizing surface 513b, and is separated from the lower end and the upper end of the inner pressurizing surface 513b by a predetermined distance. In this case, the inner pressurizing surface 513b can be divided into a lower portion extending from the upper end of the peripheral surface of the plug-in head 513, a central portion formed in the O-ring groove 513c, an upper portion extending from the lower end of the plug-in body 511, and the like. Hereinafter, for the convenience of explanation, the lower portion of the inner pressurizing surface 513b is referred to as the first inner pressurizing surface 513d, and the upper portion of the inner pressurizing surface 513b is referred to as the second inner pressurizing surface 513e.

[0365] Also, preferably, the second inner pressurizing surface 513e has an inclination angle that is greater than the inclination angle of the first inner pressurizing surface 513d by a predetermined ratio.

[0366] Furthermore, preferably, the upper end of the second inner pressurizing surface 513e has a diameter that is larger than the diameter of the plug-in body 511 by a predetermined ratio. In this case, a step surface is formed between the upper end of the second inner pressurizing surface 513e and the lower end of the plug-in body 511, and the step surface is formed by connecting the upper end of the second inner pressurizing surface 513e and the lower end of the plug-in body 511 to form a step structure. Such a step surface can perform an inversion function, so that the blade portion 5d of the fluid source wall body 5a formed toward the inner side of the fluid source 5 faces the +height direction of the fluid connector 500 and the outer side of the fluid source 5. Hereinafter, the step surface is referred to as an inversion shoulder 513f.

[0367] The discharge hole 515 is formed through-hole inside the plug 510 , penetrating the plug head 513 and the plug body 511 along the height direction of the fluid connector 500 .

[0368] The hook 517 is formed on the insertion guide surface 513a protruding along the radial direction of the plug head 513. Preferably, if the plug head 513 is inserted into the fluid source 5 through the coupling hole 5b, the hook 517 can be separated from the inner side of the fluid source wall 5a by a predetermined distance.

[0369] The O-ring 519 is made of elastically deformable rubber or other elastic materials and is inserted into the O-ring groove 513c. Preferably, the O-ring 519 has a thickness that is greater than the depth of the O-ring groove 513c by a predetermined ratio. Thus, when the O-ring 519 is inserted into the O-ring groove 513c, the O-ring 519 can protrude by a predetermined height compared to the first inner pressurizing surface 513d and the second inner pressurizing surface 513e.

[0370] Fig.104 is the main view of the pad, Fig.105 is a cross-sectional view of the gasket. Fig.106 A top view of the pad.

[0371] Next, the gasket 520 is coupled to the insert head 513 and is a component for fixing the blade portion 5d of the fluid source wall 5a in a predetermined manner.

[0372] The gasket 520 can be made of plastic or other materials and has rigidity to maintain its shape. When the plug-in 510 is threadedly coupled to the locking nut 530 , it only needs not to be deformed by the applied pressure.

[0373] As described above, the diameters of the plug body 511, the first external thread 511a, and the plug head 513 are larger than the coupling hole 5b. However, in order to set the fluid connector 500 in the lower part of the plug head 513, it is necessary to insert the lower part of the plug 510 including the lower part of the first external thread 511a into the inside of the fluid source 5 through the coupling hole 5b. As such, in order to insert the lower part of the plug 510 into the inside of the fluid source 5 through the coupling hole 5b, as the coupling hole surrounding part 5c corresponding to the surrounding area of ​​the coupling hole 5b surrounding the coupling hole 5b in the entire area of ​​the fluid source wall 5a causes elastic deformation to expand the coupling hole 5b, it is necessary to apply pressure to the coupling hole surrounding part 5c toward the inside of the fluid source 5 by the plug head 513. As a result, in the process of inserting the lower part of the plug 510 into the inside of the fluid source 5 through the coupling hole 5b, the coupling hole surrounding part 5c is gradually bent toward the inside of the fluid source 5 due to the pressure applied from the plug head 513 and the first external thread 511a, and forms a wing-shaped blade part 5d. That is, cylindrical blade portion 5d is formed in an annular coupling hole surrounding portion 5c surrounding coupling hole 5b. In this case, coupling hole 5b has the same diameter as the inner diameter of blade portion 5d and is located inside blade portion 5d in an expanded state.

[0374] As described above, as the blade portion 5d is formed in the portion 5c surrounding the coupling hole, when the plug-in head 513 passes through the coupling hole 5b, the diameter of the coupling hole 5b can be expanded to the maximum extent to correspond to the diameter of the plug-in head 513, and when the lower end of the plug-in body 511 passes through the coupling hole 5b, its diameter can be reduced to correspond to the diameter of the plug-in body 511, and when the first external thread 511a passes through the coupling hole 5b, its diameter is expanded again to correspond to the diameter of the first external thread 511a.

[0375] When the plug 510 is threadedly coupled to the locking nut 530, the gasket 520 distributes the pressure applied from the locking nut 530 along the thickness direction and the surface direction of the fluid source wall 5a and applies it to the blade portion 5d, thereby fixing the blade portion 5d along the thickness direction and the surface direction.

[0376] The gasket 520 is in the shape of a disk having a diameter greater than that of the coupling hole 5b by a predetermined ratio. Such a gasket 520 may include an insertion hole 522, a guide block 524, and the like.

[0377] The insertion hole 522 is formed through the center of the gasket 520 along the height direction of the fluid connector 500, so that the first external thread 511a and the blade portion 5d closely attached to the first external thread 511a can be inserted therein. In addition, the insertion hole 522 may include a first insertion hole 522a, a second insertion hole 522b, a third insertion hole 522c, etc. The first insertion hole 522a is formed at the lower part of the gasket 520, the second insertion hole 522b is formed at the center of the gasket 520, and the lower end is connected to the upper end of the first insertion hole 522a, and the third insertion hole 522c is formed at the upper part of the gasket 520, and the lower end is connected to the upper end of the second insertion hole 522b.

[0378] Furthermore, an inclined outer pressurizing surface 522d is formed on the inner circumferential surface of the first insertion hole 522a, so that the diameter of the first insertion hole 522a gradually increases along the lower end of the first insertion hole 522a. Preferably, when the fluid connector 500 is provided, the inclination angle of the outer pressurizing surface 522d corresponds to the inclination angle of the inner pressurizing surface 513b, so that the blade portion 5d is interposed between the corresponding outer pressurizing surface 522d and the inner pressurizing surface 513b of the plug head 513.

[0379] Furthermore, preferably, the outer pressure surface 522d makes the lower end of the first insertion hole 522a with the largest diameter the same as or larger than the diameter of the plug-in head 513, and makes the upper end of the first insertion hole 522a with the smallest diameter larger than the outer diameter of the first external thread 511a and smaller than the diameter of the plug-in head 513.

[0380] A fixing protrusion 522e is formed protruding from the outer pressure surface 522d, and when the fluid connector 500 is provided, the fixing protrusion 522e faces the inner pressure surface 513b of the plug head 513. Preferably, the fixing protrusion 522e is annular, but not limited thereto. Preferably, when the fluid connector 500 is provided, the fixing protrusion 522e may also face the O-ring 519 via the blade portion 5d, but not limited thereto.

[0381] Furthermore, preferably, the lower corner and the upper corner of the outer pressure surface 522d are rounded to prevent the blade portion 5d of the fluid source 5 from being damaged by the sharp bending of the outer pressure surface 522d, but the invention is not limited thereto. The lower corner of the outer pressure surface 522d refers to the corner portion where the outer pressure surface 522d contacts the bottom surface of the gasket 520, and the upper corner of the outer pressure surface 522d refers to the corner portion where the outer pressure surface 522d contacts the inner peripheral surface of the second insertion hole 522b.

[0382] The diameter of the second insertion hole 522b is the same as the diameter of the upper end of the first insertion hole 522, and the third insertion hole 522c has a diameter that is larger than the diameter of the second insertion hole 522b by a predetermined ratio. In this case, the second insertion hole 522b and the third insertion hole 522c are connected to form a stepped structure, so that the lower end of the locking nut 530 can be placed on the bottom surface of the third insertion hole 522c. In this regard, the bottom surface of the third insertion hole 522c is hereinafter referred to as the placement surface 522f.

[0383] The guide block 524 protrudes from the inner circumferential surface of the insertion hole 522 toward the center of the insertion hole 522 and extends along the height direction of the fluid connector 500. In addition, the guide block 524 has a width smaller than the guide groove 511b and can be inserted into the guide groove 511b of the first external thread 511a in a movable manner along the height direction of the fluid connector 500.

[0384] On the other hand, the locking nut 530 has the same structure as the locking nut 440 of the fluid connector 400 according to the fourth embodiment of the present invention. Therefore, the detailed description of the locking nut 530 will be omitted.

[0385] Figures 107 to 113 A diagram for explaining a method of placing a fluid connector at a fluid source. Fig.114 A diagram for explaining the principle of fixing the fluid source wall by the plug-in body and the gasket.

[0386] First, a punching tool is used to punch holes in the fluid source wall 5a to form the combining holes 5b.

[0387] Next, under the guidance of the guide groove 511 b and the guide block 524 , the insert body 511 is inserted into the insertion hole 522 of the gasket 520 , so that the insert 510 and the gasket 520 are combined.

[0388] Subsequently, with the upper end of the first external thread 511a of the plug-in body 511 hung on the lower end of the internal thread of the locking nut 530, the plug-in 510 and the locking nut 530 are temporarily combined by rotating the locking nut 530 along a predetermined tightening direction through the first external thread 511a, so that the locking nut 530 is located on the upper side of the gasket 520 and the locking nut 530 is separated from the plug-in head 513 by a predetermined interval.

[0389] When the insert 510 is temporarily combined with the locking nut 530 , the interval between the insert head 513 of the locking nut 530 can be used to determine that the distance between the lower end of the locking nut 530 and the lower end of the first external thread 511a is greater than the height of the gasket 520 by a predetermined ratio.

[0390] Then, the fluid connector 500 is tilted at a predetermined angle so that the hook 517 faces the coupling hole 5b, and the hook 517 is inserted into the fluid source 5 through the coupling hole 5b to be hung on the inner side of the coupling hole surrounding portion 5c.

[0391] Next, with the hook portion 517 hung on the inner side surface of the portion 5c surrounding the combining hole, pressure is applied to the plug-in head portion 513 along the inner side of the fluid source 5 to elastically deform the portion 5c surrounding the combining hole through the lever principle and expand the combining hole 5b, thereby not only inserting the lower portion of the plug-in 510 including the lower portion of the first external thread 511a in the plug-in head portion 513 into the interior of the fluid source 5 through the expanded combining hole 5b, but also forming a cylindrical blade portion 5d to surround the combining hole 5b expanded from the portion 5c surrounding the combining hole.

[0392] Subsequently, the plug-in 510 and the locking nut 530 are permanently combined by rotating the locking nut 530 along the above-mentioned tightening direction through the first external thread 511a, so that the blade portion 5d is in an upside-down inverted state between the outer pressure surface 522d of the gasket 520 and the inner pressure surface 513b of the plug-in head 513.

[0393] The permanent combination of the plug 510 and the locking nut 530 can be implemented in the following manner, that is, after the locking nut 530 is tightened for the first time in a manner that the blade portion 5d is bent toward the outside of the fluid source 5 and reversed due to the plug 510 rising toward the outside of the fluid source 5, the locking nut 530 is tightened for the second time until the reversed blade portion 5d is between the outer pressure surface 522d of the gasket 520 and the inner pressure surface 513b of the plug head 513.

[0394] When the blade portion 5d is formed toward the inside of the fluid source 5, if the locking nut 530 is tightened for the first time, the blade portion 5d may bend toward the outside of the fluid source 5 and reverse up and down in a manner of protruding toward the outside of the fluid source 5 due to the friction force applied by the first external thread 511a of the plug-in body 511 rising toward the outside of the fluid source 5, the reverse shoulder 513f of the plug-in head 513, and other external forces.

[0395] When the locking nut 530 is tightened for the second time while the blade portion 5d is reversed up and down, the blade portion 5d is located between the outer pressure surface 522d and the inner pressure surface 513b. Preferably, the locking nut 530 is tightened for the second time until the upper portion of the blade portion 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 plug-in body 511 and the inner circumferential surface of the second insertion hole 522b. Thus, the upper portion of the blade portion 5d is bent based on the upper side corner of the outer pressure surface 522d, and the lower portion of the blade portion 5d is bent based on the lower side corner of the outer pressure surface 522d. Therefore, the blade portion 5d can be bent in two steps to form a two-stage sealing structure using the blade portion 5d.

[0396] As described above, if the blade portion 5d is bent at the inclination angle of the inner pressure surface 513b and the outer pressure surface 522d so as to be interposed between the inner pressure surface 513b and the outer pressure surface 522d, the plug-in head 513 and the gasket 520 can simultaneously fix the blade portion 5d in the thickness direction and the surface direction of the fluid source wall 5a. Thus, the plug-in head 513, the gasket 520 and the fluid connector 500 including the same can be combined with the fluid source 5. In addition, the fixing protrusion 522e can apply pressure to the lower part of the blade portion 5d to further firmly fix the blade portion 5d, and the O-ring 519 can be closely attached to the inner peripheral surface of the lower part of the blade portion 5d and seal between the plug-in head 513 and the blade portion 5d.

[0397] Then, the branch pipe 2 a is coupled to the lock nut 530 .

[0398] The method of combining the fluid guide component and the locking nut 530 is the same as the disclosure of the fluid connector 400 of the fourth embodiment of the present invention, and therefore, the detailed description thereof will be omitted.

[0399] As described above, in the entire area of ​​the fluid source wall 5a, the surrounding portion 5c of the coupling hole corresponding to the surrounding area surrounding the coupling hole 5b is protruded by a predetermined height along the outer side of the fluid source 5 to form the blade portion 5d. In addition to the thickness direction of the fluid source wall 5a, the fluid connector 500 fixes the blade portion 5d along the thickness direction and the surface direction of the fluid source wall 5a by using the gasket 520 and the plug head 513. Thus, the fluid connector 500 can prevent the corresponding fluid connector 500 from being separated from the coupling hole 5b or a gap is generated between the corresponding fluid connector 500 and the inner peripheral surface of the coupling hole 5b, from which the fluid may flow out.

[0400] Furthermore, since the blade portion 5d protruding at a predetermined height along the outer side of the fluid source 5 is fixedly provided on the fluid connector 500, the fluid connector 50 can be stably coupled to the fluid source 5 even when the coupling hole 5b of the fluid source 5 is an elliptical shape or other uneven shapes.

[0401] Furthermore, the plug 510 passes through the connecting hole 5b that is expanded during the forming process of the blade portion 5d. Therefore, compared to the existing fluid connector in which the diameter of the plug 510 is the same as the diameter of the connecting hole 5b, the fluid connector 500 of the present invention can further expand the diameter of the plug 510 and the diameter of the discharge hole 515 formed in the plug 510.

[0402] Furthermore, if the locking nut 530 is tightened on the outside of the fluid source 5, the fluid connector 500 can apply pressure to the blade portion 5d of the fluid source wall 5a in both the inner and outer directions through the plug 510 and the gasket 520. Thus, the fluid connector 500 can provide convenience in terms of installation or recovery, and the fluid connector 500 can be installed by simply operating the fluid connector 500 on the outer side of the fluid source 5 with a tool, without having to operate the fluid connector 500 on both the inner and outer sides of the fluid source 5 with a tool.

[0403] The above description is merely an illustrative description of the technical concept of the present invention. A person skilled in the art may make various modifications and variations without departing from the essential characteristics of the present invention.

[0404] Therefore, the disclosed embodiments of the present invention are only for illustration and are not intended to limit the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited to the above embodiments. The protection scope of the present invention should be interpreted based on the protection scope of the invention claims, and all technical concepts within the equivalent scope thereof belong to the protection scope of the present invention claims.

Claims

1. A fluid connector, combined with a coupling hole formed in a main pipe, characterized in that: The above-mentioned fluid connector comprises: A plug-in unit, at least a portion of which is inserted into the above-mentioned combining hole; An elastic bushing is movably mounted on the plug-in such that at least a portion of the bushing is inserted into the coupling hole together with the plug-in; a gasket movably mounted on the plug-in unit so as to be disposed outside the main pipe in a state facing the elastic bushing; and A lock nut is threadedly coupled to the plug-in and is disposed outside the main pipe in a state facing the gasket. When the locking nut is threadedly coupled to the plug-in, the elastic bushing is elastically deformed due to the pressure transmitted through the plug-in and the gasket and applies pressure to the inner corners at the lower end of the inner circumferential surface of the coupling hole and the outer corners at the upper end in the height direction of the main pipe, and can also apply pressure in at least one of the length direction and the circumferential direction of the main pipe.

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