Fixing cap assembly and coupling pipe including same

Abstract

The present invention relates to a fixing cap assembly and a coupling pipe including the same. The fixing cap assembly according to one embodiment of the present invention includes a fixing cap that is fastened to a connection portion of a main body to which at least one pipe is connected, thereby fixing the main body and the pipe; a washer that is located inside the fixing cap and compresses a sealing member 120 interposed between the main body and the pipe as the fixing cap is fastened, and whose diameter radially contracts and returns to its original state; and a fastening member that includes a plurality of teeth that protrude radially from the inner surface of the washer toward the outer surface of the pipe, and pressurize the outer surface of the pipe as the washer contracts, thereby fixing the pipe.

Description

Technical Field

[0001] The embodiments of this specification relate to a fixed cap assembly for pipe connection and a joint pipe including the same. More specifically, the embodiments relate to a joint pipe for connecting a plurality of pipes, a fixed cap assembly used for connecting a pipe to a main body of equipment such as a sewage receiver or a small manhole that requires pipe connection, and a joint pipe including the same.

Background Art

[0002] Pipes are mainly used for transporting fluids (gases or liquids) and powders. The passage for the fluid constituted by pipes is called a "pipe line". And the installation of a pipe line considering factors such as the flow rate of the fluid, physical property values, and frictional resistance is called piping.

[0003] Normally, in piping work, at least one pipe, preferably a plurality of pipes, are connected to each other. At this time, a pipe connection cap (hereinafter referred to as a fixed cap assembly) is mainly used.

[0004] For example, the fixed cap assembly can be used not only for a joint pipe connecting a plurality of pipes but also for other equipment products such as a sewage receiver or a small manhole.

[0005] A joint pipe is mainly used when connecting a plurality of pipes and changing the direction of the pipe line or branching the pipe line.

[0006] In addition, a sewage receiver or a small manhole can have various shapes and structures depending on the application. The sewage collected at one place by the sewage receiver or the small manhole must be discharged to the outside through at least one or more branch pipes. At this time, a fixed cap assembly for pipe connection can be used.

[0007] According to the conventional method, after inserting one end portion of the pipe into the main body for connecting the pipes, the cap was fastened to restrain the connecting portion of the pipes. However, according to these conventional methods, there are disadvantages in that they are not suitable for withstanding pressure under high water pressure conditions above the set level, and it is difficult to ensure watertightness.

[0008] In recent years, a method has been introduced in which a sealing member is installed between the main body (or joint pipe main body) and the pipe for connecting the pipes, and when the cap is fastened, the cap directly presses the sealing member to seal.

[0009] However, under high water pressure resistance conditions with a high set level, not only does the watertight function deteriorate, but the structure for strongly clamping the pipe is insufficient, the pipe connection work is complicated, and there is a disadvantage in that the work convenience is poor.

Summary of the Invention

Problems to be Solved by the Invention

[0010] The object of the present specification is to provide a fixed cap assembly that simplifies the connection work between the main body (e.g., joint pipe, sewage receiver, small manhole, etc.) of the object to which the pipe must be connected and the pipe, and maintains the connection of the pipe with a strong clamping force.

[0011] Another object of the present specification is to provide a joint pipe for connecting between a plurality of pipes using the fixed cap assembly.

[0012] The object of the present invention is not limited to the objects mentioned above, and other objects and advantages of the present invention not mentioned can be more clearly understood from the embodiments of the present invention described below. Also, the objects and advantages of the present invention can be realized by the components described in the claims and their combinations.

Means for Solving the Problems

[0013] According to one aspect of the present invention, there can be provided a fixed cap assembly for connecting a pipe to a main body to which a joint pipe or at least one pipe is connected, for example, a connecting component of a pipe such as a sewage receiver or a small manhole.

[0014] The fixed cap assembly according to an embodiment of the present invention includes a fixed cap fastened to a connecting portion of a main body to which at least one pipe is connected, for fixing between the main body and the pipe; a washer located inside the fixed cap, which compresses a seal member interposed between the main body and the pipe by fastening the fixed cap, and contracts and restores in the radial direction; and a fastening member including a plurality of tooth-shaped protrusions protruding radially from the inner peripheral surface of the washer toward the outer peripheral surface of the pipe, and pressing the outer peripheral surface of the pipe by contraction of the washer to fix the pipe.

[0015] The fastening member according to an embodiment of the present invention can be configured to include a plurality of tooth-shaped protrusions inserted and fixed circumferentially at intervals on the inner peripheral surface of the washer. As an example, the tooth-shaped protrusions divided into 3 to 10 pieces are arranged circumferentially on the inner peripheral surface of the washer, and when the washer contracts, the outer peripheral surface of the pipe can be pressed to fix the pipe.

[0016] Also, the fastening member according to another embodiment of the present invention can be configured to include a ring-shaped body and a plurality of tooth-shaped protrusions.

[0017] The ring-shaped body is inserted into the inner peripheral surface of the washer and can contract and restore corresponding to the washer. Each of the plurality of tooth-shaped protrusions may have one end connected circumferentially via a predetermined interval groove inside the ring-shaped body and the other end protruding in a sawtooth shape toward the outer peripheral surface of the pipe.

[0018] Also, a plurality of interval grooves may be formed at intervals and separated from each other between each of the plurality of tooth-shaped protrusions.

[0019] Here, each of the plurality of spacing grooves can have a circular groove shape.

[0020] When the shape of each spacing groove is a circular groove shape, for example, each spacing groove has a circular groove shape with a constant radius of curvature, when the ring-shaped body contracts corresponding to the washer, a large load does not concentrate on a specific part within the interval, and the load can be evenly dispersed. As a result, even when the ring-shaped body made of a metal material repeatedly contracts and restores, local deformation of the material can be prevented, and there is an advantage that the durability life is increased. Furthermore, an improvement in the contraction and restoration performance of the ring-shaped body can be expected.

[0021] Also, the ring-shaped body can be inserted into a circular fitting groove provided on the inner peripheral surface of the washer. The ring-shaped body is inserted into the circular fitting groove provided on the inner peripheral surface of the washer, and due to the contraction and restoration of the washer, it can move in the radial direction to contract or restore together with the washer. As a result, a plurality of tooth-shaped protrusions connected to the inside of the ring-shaped body can be pressed toward the outer peripheral surface of the pipe or move in a direction in which the pressure is released, enabling the fixing and releasing of the pipe.

[0022] Also, the fastening member further includes an elastic connecting member that provides an elastic force necessary for restoration when the ring-shaped body contracts.

[0023] Both ends of the elastic connecting member can be connected to an opening part where a part of the circular arc section is interrupted in the ring shape of the ring-shaped body, and it may be made of an expandable and contractible material. As an example, an elastic connecting member can use an elastic material band having a shape and length corresponding to the interrupted opening part of the ring-shaped body.

[0024] Also, the tooth-shaped protrusion can have a sharp part whose cross-section shrinks as it goes away from the ring-shaped body and in the protruding direction. As an example, the sharp part can have a sharp saw-tooth shape that can bite and fix the outer peripheral surface of the pipe.

[0025] Also, one surface of the pointed portion can be formed to have a bending surface that bends toward the pipe connection direction. As one surface of the pointed portion has a bending surface that bends in a round shape and this bending surface is formed facing the pipe connection direction, when inserting the pipe, the interference between the pipe and the pointed portion is reduced, and the pipe insertion operation can be facilitated. Also, after connection between the pointed portion and the pipe, the pipe can be tightened in the direction opposite to the direction in which the pipe is separated, and a stronger tightening force can be ensured.

[0026] Also, the plurality of tooth-shaped protrusions can be provided in a plurality of piece-like shapes separated from each other.

[0027] Also, the washer is located forward with respect to the fastening direction of the fixed cap, contracts and restores in the radial direction, and includes a first annular body having the circular fitting groove; a second annular body connected to the rear end of the first annular body with respect to the fastening direction of the fixed cap and having a diameter smaller than that of the first annular body. The first annular body includes a plurality of gaps cut in a straight shape at set intervals along the circumferential direction, and the outer peripheral surface of the first annular body can further include wedge-shaped protrusions protruding obliquely downward toward the fastening direction of the fixed cap.

[0028] Also, the fixed cap includes an annular cap body portion having a hollow through which the pipe is inserted; the cap body portion has an inner diameter size larger than the outer diameter size of the pipe to be connected, and a plurality of circumferential protrusions protruding apart from each other in the circumferential direction are provided on the outer peripheral surface of the cap body portion, and female screw portions for screw-coupling to the male screw portions at both ends of the main body of the joint pipe can be provided on the inner peripheral surface of the cap body portion.

[0029] Further, the main body is formed at a connection portion of the main body to which the pipe is connected, and includes a pipe accommodation portion into which at least a part of the pipe is inserted; a pipe support portion formed inside the pipe accommodation portion and protruding to limit the insertion length of the pipe; a male screw portion formed outside the pipe accommodation portion and screw-coupled to a female screw portion of the fixing cap; and a seal member accommodation portion formed with a step inside the pipe accommodation portion and accommodating the seal member.

[0030] The washer is formed such that a tip portion enters toward the seal member accommodation portion when the fixing cap is fastened. The seal member includes at least one elastic ring that elastically deforms so that a contact area expands between the main body and the pipe by the pressurization of the tip portion of the washer within the seal member accommodation portion when the fixing cap is fastened.

[0031] According to another aspect of the present invention, a joint pipe using a fixing cap assembly is provided.

[0032] The joint pipe according to an embodiment of the present invention includes a joint pipe main body that connects a plurality of pipes; a seal member that is inserted into both ends of the joint pipe main body and seals between both ends of the joint pipe main body and the pipes; and a fixing cap that is screwed and fastened to both ends of the joint pipe main body while surrounding a connection portion of the pipes, and a washer that is located inside the fixing cap and compresses the seal member located between the joint pipe main body and the pipes by fastening the fixing cap, and contracts and restores in the radial direction, and a tightening member that includes a plurality of tooth-shaped protrusions that protrude in the radial direction from an inner circumferential surface of the washer toward an outer circumferential surface of the pipe and fix the outer circumferential surface of the pipe by contracting the washer.

[0033] The joint pipe body includes a plurality of pipe accommodating portions located at both ends of the length and into which a plurality of pipes to be connected are inserted; and a connecting portion that connects between the plurality of pipe accommodating portions and has a diameter smaller than that of the plurality of pipe accommodating portions. At the center of the length of the connecting portion, a pipe support portion that restricts the insertion of each of the plurality of pipes to be connected may be provided so as to protrude in a direction of reducing the inner diameter of the connecting portion.

[0034] The washer includes a first annular body that is located forward with respect to the fastening direction of the fixed cap, contracts and restores in the radial direction, and has the circular fitting groove; and a second annular body that is connected to the rear end of the first annular body with respect to the fastening direction of the fixed cap and has a diameter smaller than that of the first annular body. The first annular body includes a plurality of gaps that are cut in a straight shape at set intervals along the circumferential direction, and a wedge-shaped protrusion that protrudes obliquely downward in the fastening direction of the fixed cap may be further provided on the outer peripheral surface of the first annular body.

Advantages of the Invention

[0035] According to the embodiments of the present specification, by connecting the pipes with a strong tightening force, it is possible to prevent the pipes from detaching, as well as ensuring watertightness even under high water pressure conditions.

[0036] Further, according to the embodiments of the present specification, a fitting groove is provided on the inner peripheral surface of the washer, and a tightening member for tightening the pipes can be formed by directly assembling a plurality of tooth-shaped protrusions each in a divided form into the fitting groove, or by integrally connecting a plurality of tooth-shaped protrusions to a ring-shaped body inserted into the fitting groove.

[0037] Thereby, according to the embodiments of the present specification, while having a relatively simple structure, there is an advantage that the shapes of the washer and the tightening member are not exposed outside the fixed cap, and the appearance is excellent in aesthetics. Just by tightening the fixed cap, the washer can contract, and the tightening member can strongly press the outer peripheral surface of the pipe, improving the connection strength of the pipe.

Brief Description of the Drawings

[0038]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0039] Hereinafter, with reference to the drawings, embodiments of the present invention will be described in detail so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement them. The present invention can be embodied in various different forms and is not limited to the embodiments described herein.

[0040] To clearly explain the present invention, parts not related to the explanation are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification. In addition, some embodiments of the present invention will be described in detail with reference to the exemplary drawings. When assigning reference numerals to the components of each drawing, the same components can preferably have the same reference numerals even if they are shown on other drawings. Also, when explaining the present invention, if a specific explanation of a related known configuration or function is determined to obscure the gist of the present invention, the detailed explanation thereof can be omitted.

[0041] When describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. can be used. These terms are for distinguishing the components from other components, and the essence, order, sequence, or number of the components are not limited by these terms. When a component is described as being "connected", "coupled", or "joined" to another component, it should be understood that the component may be directly connected or joined to the other component, but other components may "intervene" between the components, or the components may be "connected", "coupled", or "joined" through other components.

[0042] Also, in implementing the present invention, for the sake of convenience of explanation, the components can be subdivided and described, but these components may be embodied in one device or module, or one component may be divided and embodied in a plurality of devices or modules.

[0043] [Fixed cap assembly] FIG. 1 shows a state in which a pipe 10 is connected to a main body (e.g., sewage receiver, small manhole, joint pipe, etc.) 110 using a fixed cap assembly according to an embodiment of the present invention.

[0044] Referring to FIG. 1, although not shown separately, on one side there is a main body (e.g., sewage receiver, small manhole, joint pipe, etc.) 110 to which the pipe 10 is connected, and on the other side there is the pipe 10.

[0045] A fixed cap assembly 130 is located between the main body 110 and the pipe 10, and the fixed cap assembly 130 serves to quickly fasten the main body 110 and the pipe 10 in a simple manner.

[0046] The main body 110 uses the term "main body" for convenience of explanation, but in a specific example, it may be various equipment to which the pipe 10 is connected, such as devices like sewage receivers and small manholes.

[0047] Also, the main body 110 may be a joint pipe of various forms connected so as to change or branch the fluid flow direction between a plurality of pipes 10.

[0048] The fixed cap assembly 130 can connect the main body 110 and the pipe 10 under high water pressure conditions. In addition, it has high waterproof performance and can bite and fix the connected pipe 10 with a strong clamping force, thus preventing the separation and detachment of the pipe 10.

[0049] Also, the fixed cap assembly 130 can reduce the complicated preliminary work for connecting the pipe 10 to the main body 110. For example, it is possible to eliminate troublesome operations such as having to first partially insert the pipe 10 into the main body 110 and then fasten the fixed cap 140, or having to separately insert a washer 160 in advance before fastening the fixed cap 140. A

[0050] Thus, when using the fixed cap assembly 130 according to an embodiment of the present invention, an operator can easily and promptly perform a pipe construction operation of connecting the pipe 10 to the main body 110.

[0051] FIG. 2 is a drawing showing a disassembled state before connecting a pipe to a main body using a fixed cap assembly according to an embodiment of the present invention.

[0052] Referring to FIG. 2, a fixed cap assembly 130 according to an embodiment of the present invention includes a fixed cap 140, a washer 160, and a fastening member 180.

[0053] The fixed cap 140 is fastened to a connection portion of the main body 110 to which the pipe 10 is connected, and serves to fix between the main body 110 and the pipe 10.

[0054] Specifically, the fixed cap 140 is screwed and fastened to the connection portion of the main body 110 while surrounding the connection portion of the pipe 10.

[0055] The fixed cap 140 fixes between the main body 110 and the pipe 10, and by being fastened to the main body 110, restrains and maintains the connection state of the pipe 10 connected to the main body 110, and prevents separation and detachment of the pipe 10.

[0056] For example, the fixed cap 140 includes an annular cap body portion 141. The cap body portion 141 has an inner diameter size larger than the outer diameter size of the pipe 10 and has a size into which the pipe 10 can be inserted.

[0057] A circumferential protrusion 142 is provided on the outer peripheral surface of the cap body portion 141. The circumferential protrusion 142 may protrude in a band shape at intervals in the circumferential direction from the outer peripheral surface of the cap body portion 141.

[0058] In addition, a female screw portion 144 is provided on the inner peripheral surface of the cap body portion 141. The female screw portion 144 of the cap body portion 141 is screwed to a male screw portion 112 provided on the main body 110.

[0059] Here, although not specifically shown, the main body 110 refers to the main bodies of various equipment devices to which at least one pipe 10 is connected, such as sewage receivers, small manholes, and joint pipes.

[0060] Referring to FIG. 2, the main body 110 includes a connecting portion 115 to which the pipe 10 is connected, and a pipe accommodating portion 111 formed in the connecting portion 115 and into which at least a part of the pipe 10 is inserted.

[0061] Inside the pipe accommodating portion 111, a pipe support portion 116 for restricting the length of the inserted pipe 10 can be further provided.

[0062] And the male screw portion 112 is formed outside the pipe accommodating portion 111 and is screwed to the female screw portion 144 of the fixing cap 140 to enable fastening of the fixing cap 140.

[0063] On the other hand, inside the main body 110, more specifically, inside the pipe accommodating portion 111, a seal member accommodating portion 117 (see FIG. 9) for accommodating the seal member 120 can be further provided.

[0064] The seal member accommodating portion 117 (see FIG. 9) is formed with a step inside the pipe accommodating portion 11, and the seal member 120 is interposed at the set position between the main body 110 and the pipe 10 to have a water-tight ensuring function.

[0065] The seal member 120 is formed to be strongly compressed on the seal member accommodating portion 117 (see FIG. 9) by fastening of the fixing cap 140 so as to provide a water-tight ensuring function between the main body 110 and the pipe 10. For this reason, the seal member 120 can have a material capable of elastic contraction and restoration by an external force. For example, the seal member 120 can use a rubber material for sealing.

[0066] The washer 160 is positioned inside the fixed cap 140. When the fixed cap 140 is fastened, it compresses the seal member 120 interposed between the main body 110 and the pipe 10 to provide a waterproof function.

[0067] When the fixed cap 140 is fastened, the seal member 120 is strongly compressed between the main body 110 and the pipe 10 by the pressure on the tip part of the washer 160 to seal the gap. Thereby, the waterproof function can be exerted even under high water pressure conditions.

[0068] Also, the washer 160 is annularly coupled inside the fixed cap 140. When the fixed cap 140 is fastened, it contracts radially, and when the fastening of the fixed cap 140 is released, it restores radially.

[0069] For example, the washer 160 includes a first annular body 161 that is positioned forward with respect to the fastening direction of the fixed cap 140 and contracts and restores radially, and a second annular body 163 that is connected to the rear end of the first annular body 161. In addition to this, the first annular body 163 includes a plurality of gaps 1612 that are cut in a straight line at set intervals along the circumferential direction, and a wedge-shaped protrusion 1611 that protrudes downward obliquely in the fastening direction of the fixed cap 140 is provided on the outer peripheral surface of the first annular body 163.

[0070] The fastening member 180 includes a plurality of tooth-shaped protrusions 183 that protrude radially from the inner peripheral surface of the washer 160 toward the outer peripheral surface of the pipe 10.

[0071] Specifically, the plurality of tooth-shaped protrusions 183 can have a sawtooth shape that protrudes a predetermined length toward the outer peripheral surface of the pipe 10 inserted through the inner diameter of the washer 160 when the washer 160 contracts, and strongly tightens the pipe 10.

[0072] As an example, although the plurality of serrated protrusions 183 can be provided in a sheet form divided into about 3 to 10 pieces, each serrated protrusion 183 may be inserted and fixed at least one by one at intervals on the inner peripheral surface of the washer 160 and arranged in the circumferential direction. As it has such a form, when the washer 160 contracts, the plurality of serrated protrusions 183 can bite into the outer peripheral surface of the pipe 10 and strongly clamp the pipe.

[0073] As another example, the fastening member 180 may have a structure including a ring-shaped body 181 and a plurality of serrated protrusions 183. This will be described in detail with reference to FIGS. 6 to 8.

[0074] FIGS. 3 and 4 are perspective views showing the fixed cap assembly according to an embodiment of the present invention from the first and second directions, FIG. 5 is a cross-sectional view schematically showing the fixed cap assembly, and FIG. 6 shows the coupling structure and shape between the washer and the fastening member.

[0075] The fixed cap 140 is screwed and fastened to the connecting portion 115 of the main body 110 while surrounding the connecting portion of the pipe 10 to fix the space between the main body 110 and the pipe 10.

[0076] The fixed cap 140 includes an annular cap body portion 141. The annular cap body portion 141 has an inner diameter size larger than the outer diameter size of the pipe 10, and a circumferential protrusion 142 is provided on the outer peripheral surface of the cap body portion 141 and is formed so as to be screw-coupled to the main body 110 in a manner of rotating in a set direction.

[0077] For example, the circumferential protrusion 142 may protrude in a band shape on the outer peripheral surface of the cap body portion 141. However, it is not necessarily limited to the illustrated shape and can have various deformed shapes.

[0078] And, a female screw portion 144 is provided on the inner peripheral surface of the annular cap body portion, and the female screw portion 144 is screw-coupled to the male screw portion 112 (see FIG. 2) of the main body 110 (see FIG. 2).

[0079] The fixed cap 140 further includes an inner diameter reduction portion 143.

[0080] The inner diameter reduction portion 143 is formed at the rear end in the fastening direction of the fixed cap 140 in the annular cap body portion 141, and may be formed with a step in a shape where the diameter is reduced so as to have an inner diameter size corresponding to the outer diameter size of the pipe 10.

[0081] The inner diameter reduction portion 143 is formed so as to surround the pipe 10 connected to the main body 110, supports the pipe 10, and contacts the second annular body 163 of the washer 160 to prevent separation and detachment between the fixed cap 140 and the washer 160.

[0082] The washer 160 is coupled inside the fixed cap 140. When the fixed cap 140 is fastened, the washer 160 compresses the seal member 120 between the main body 110 and the pipe 10.

[0083] For example, when the fixed cap 140 is fastened, the tip portion of the washer 160 is formed to enter toward the seal member accommodation portion 117 (see FIG. 9).

[0084] The washer 160 is coupled in a ring shape inside the fixed cap 140. In particular, when the fixed cap 140 is fastened, the washer 160 contracts in the radial direction, and when the fastening of the fixed cap 140 is released, the radially contracted shape returns to its original state. For this reason, the washer 160 is located forward with respect to the fastening direction of the fixed cap 140, and includes a first annular body 161 that contracts and expands in the radial direction, and a second annular body 163 connected to the rear end of the first annular body 161. The second annular body 163 has a shape with a relatively reduced diameter compared to the first annular body 161.

[0085] The first annular body 161 includes a plurality of gaps 1612 that are linearly cut at set intervals along the circumferential direction. The plurality of gaps 1612 enable the radial contraction and restoration of the first annular body 161. That is, the first annular body 161 can contract or be restored in the radial direction by the contraction and expansion of the plurality of gaps 1612.

[0086] A wedge-shaped protrusion 1611 is further provided on the outer peripheral surface of the first annular body 161.

[0087] The wedge-shaped protrusion 1611 refers to a wedge-shaped portion that protrudes obliquely downward in the fastening direction of the fixed cap 140 on the outer peripheral surface of the first annular body 161.

[0088] When the fixed cap 140 is fastened to the main body 110, the wedge-shaped protrusion 1611 is radially pressed against the insertion guide surface 118 of the extension body 113 protruding from the main body 110. As a result, when the fixed cap 140 is fastened, the first annular body 161 may contract the washer 160 so as to shrink toward the pipe 10 even if the washer 160 is contracted.

[0089] The fastening member 180 includes a plurality of tooth-shaped protrusions 183 that protrude radially from the inner peripheral surface of the washer 160 toward the outer peripheral surface of the pipe 10.

[0090] In one embodiment of the present invention, the fastening member 180 includes a ring-shaped body 181, a plurality of tooth-shaped protrusions 183, and an elastic connecting member 182 (see FIG. 7).

[0091] Referring to FIG. 7, the ring-shaped body 181 refers to a ring-shaped metal member inserted into the inner peripheral surface of the washer 160 (see FIG. 6). The ring-shaped body 181 may be made of a flexible metal material that can be bent by an external pressure.

[0092] Since the ring-shaped body 181 is inserted into the inner peripheral surface of the washer 160 (see FIG. 6) that contracts radially when the fixed cap 140 is fastened, it may contract radially together with the washer 160 (see FIG. 6) in response to the contraction of the washer 160 (see FIG. 6).

[0093] One end of each of the plurality of tooth-shaped protrusions 183 is connected circumferentially at a predetermined interval inside the ring-shaped body 181. The other end of each of the plurality of tooth-shaped protrusions 183 protrudes in a serrated shape in the radial direction of the ring-shaped body 181.

[0094] At this time, a plurality of spaced grooves 185 are formed at a certain distance from each other between each of the plurality of tooth-shaped protrusions 183.

[0095] For example, each of the plurality of spaced grooves 185 can have a shape of a circular groove (or a semi-circular groove or an arc-shaped groove).

[0096] When the plurality of spaced grooves 185 have a circular groove shape with a constant radius of curvature, when the ring-shaped body '181 contracts in response to the contraction of the washer 160 (FIG. 6), it is possible to prevent a large load from concentrating on a specific part among the spaced grooves 185. In this way, as a circular groove-shaped spaced groove 185 is formed one by one between each of the plurality of tooth-shaped protrusions 183, when the fastening member 180 contracts or expands (restores), the load applied to the fastening member 180 can be evenly dispersed. As a result, local damage or deformation of the fastening member 180 made of a metal material can be prevented. Also, an improvement in durability due to the contraction and restoration of the fastening member 180 can be expected.

[0097] On the one hand, the ring-shaped body 181 can be inserted into the circular fitting groove 162 provided on the inner peripheral surface of the washer 160. Therefore, it is not necessary to assemble each of the plurality of separated sheet-like tooth-shaped protrusions 183 one by one into the washer 160. The ring-shaped body 181 can move in the radial direction to contract or recover together with the washer 160 due to the contraction and recovery of the washer 160. As a result, the plurality of tooth-shaped protrusions 183 connected to the inside of the ring-shaped body 181 can press the outer peripheral surface of the pipe 10 or protrude and retract in the direction in which the pressure is released, and the pipe can be fixed and unfixed.

[0098] The elastic connecting member 182 plays a role of providing the elastic force necessary for the recovery of the ring-shaped body 181.

[0099] As the elastic connecting member 182, a band-shaped member having elasticity with both ends connected to an opening portion where a part of the arc section is interrupted in the ring shape of the ring-shaped body 181 can be used. For example, unlike the ring-shaped body 181 made of a metal material, the elastic connecting member 182 is more elastic and flexible, does not easily break, and can extend as much as necessary, and after extending, it can be restored to its initial shape when the external force is released. For example, the elastic connecting member 182 can be made of a material such as rubber.

[0100] In one embodiment of the present invention, when the fixed cap assembly 130 is rotatably coupled to the main body 110, the washer 160 contracts while the ring-shaped body 181 contracts in the radial direction. As the ring-shaped body 181 contracts in the radial direction, both ends of the elastic connecting member 182 are pressurized, and the elastic connecting member 182 contracts.

[0101] Conversely, when the fixed cap assembly 130 that was rotatably coupled to the main body 110 is separated from the main body 110, the washer 160 expands. When the washer 160 expands, the elastic force of the elastic coupling member 182 is transmitted to the connection site between the ring-shaped body 181 and the elastic coupling member 182. Due to this elastic force, the contracted ring-shaped body 181 expands. When the ring-shaped body 181 expands, the toothed protrusion 183 no longer presses against the outer peripheral surface of the pipe 10, and the pipe 10 can be easily separated from the main body 110.

[0102] On the other hand, the toothed protrusion 183 can be far from the ring-shaped body 181 and have a pointed portion 1831 whose cross-section shrinks as it goes in the protruding direction. The pointed portion 1831 refers to a serrated tip portion that can bite and fix the outer peripheral surface of the pipe sharply.

[0103] At this time, one surface of the pointed portion 1831 may be formed to have a curved surface 1832 that bends toward the connection direction (W1, see Fig. 5) of the pipe.

[0104] One surface of the pointed portion 1831 has a curved surface 1832 that bends in a round shape, and when this curved surface 1832 is formed facing the connection direction (W1, see Fig. 5) of the pipe, during the insertion of the pipe 10 (see Fig. 10), the friction or interference between the pipe and the pointed portion 1831 can be reduced. Thereby, the insertion of the pipe 10 becomes easy, and damage to the surface of the pipe 10 can be reduced. [[ID=,13]]

[0105] Also, after the connection between the pointed portion 1831 and the pipe 10, the pointed portion 1831 may face in the direction opposite to the direction in which the pipe 10 is separated, which can prevent the separation and detachment of the pipe 10 and clamp the pipe with higher strength.

[0106] On the other hand, in another embodiment of the present invention, the fastening member 180 may have a part directly inserted into the inner peripheral surface of the washer 160 and may include only a plurality of fixed serrated protrusions 183a to 183h (see FIG. 8). In this case, the plurality of serrated protrusions 183a to 183h are provided in a plurality of separated sheet-like forms.

[0107] Each of the serrated protrusions 183a to 183h may be made of a soft metal material that can be bent by an external pressure.

[0108] In addition, circular or semi-circular spacing grooves 185 are formed in each of the serrated protrusions 183a to 183h. When the fastening member 180 contracts or expands (restores) due to the spacing grooves 185 formed in each of the serrated protrusions 183a to 183h, the load applied to the fastening member 180 can be evenly dispersed. As a result, local damage or deformation of the fastening member 180 made of a metal material can be prevented. In addition, an improvement in durability due to the contraction and restoration of the fastening member 180 can be expected.

[0109] FIG. 8 shows an embodiment in which the fastening member 180 includes eight serrated protrusions 183a to 183h, but the number of serrated protrusions included in the fastening member 180 may vary depending on the embodiment. Each of the serrated protrusions 183a to 183h may be inserted and fixed to the inner peripheral surface of the washer 160 and may protrude in a sawtooth shape.

[0110] FIG. 9 is a cross-sectional view showing a state before connecting a pipe to a main body using a fixed cap assembly according to an embodiment of the present invention, and FIG. 10 is a cross-sectional view showing a state after connecting a pipe to the main body using the fixed cap assembly.

[0111] First, the fixed cap assembly 130 is partially fastened to the main body 110 (see FIG. 9). Next, the pipe 10 is inserted into the main body 110 to complete the fastening of the fixed cap assembly 130 (see FIG. 10).

[0112] Referring to FIG. 9, before inserting the pipe 10, the seal member 120 is inserted into the main body 110. When the fixing cap 140 is fastened, the washer 160 enters the inside of the main body 110 in the fastening direction together with the fixing cap 140 and presses the seal member 120.

[0113] The seal member 120 includes an elastic ring 121 and an elastic band 123. The elastic ring 121 is accommodated in the seal member accommodating portion 117 and is pressed by the tip portion of the washer 160 when the fixing cap 140 is fastened. The elastic band 123 is provided so as to project in a band shape from the elastic ring 121 and can be deformed so that the contact area of the elastic ring 121 increases due to the pressing of the washer 160. Thereby, the waterproof function can be ensured even under high water pressure conditions.

[0114] Referring to FIG. 10, after the pipe 10 is completely inserted into the main body 110, the fastening of the fixing cap 140 is completed.

[0115] The main body 110 refers to at least a part of various equipment to which the pipe 10 is connected, such as a sewage receiver, a small manhole, etc., and the pipe 10 is connected and fixed to the main body 110.

[0116] While the fixing cap 140 is being completely fastened, the first annular body 161 of the washer 160 is in close contact with the insertion guide surface 118 and contracts in the radial direction. As a result, the fastening member 180 fixed to the fitting groove 162 of the first annular body 161 contracts in the radial direction, and the toothed protrusion 183 strongly bites the outer peripheral surface of the pipe 10 to fix the connection state of the pipe 10.

[0117] The insertion guide surface 118 of the main body 110 serves to contract the washer 160 and the fastening member 18 in the radial direction according to the progress of the fastening of the fixing cap 140, and as a result, the toothed protrusion 183 presses the outer peripheral surface of the pipe 10.

[0118] [Joint pipe] FIG. 11 and FIG. 12 are perspective views showing a connection structure of a joint pipe including a fixed cap assembly according to an embodiment of the present invention.

[0119] The joint pipe according to an embodiment of the present invention includes a joint pipe body 310, a plurality of seal members 120, and a plurality of fixed cap assemblies 130.

[0120] The joint pipe body 310 connects a plurality of pipes 10 at both ends to extend or change the flow direction, and is not necessarily limited to the shape shown in the figure, and can have various shapes such as an "L" shape and a "Y" shape.

[0121] The joint pipe body 310 includes a pipe accommodating portion 311 in which the pipe is accommodated, a female screw portion 144 formed on the inner peripheral surface of the fixed cap 140, and a male screw portion 312 that is screw-coupled. Further, at the outer end of the male screw portion 112, an extension body 113 that extends and protrudes by a predetermined length in both lengthwise directions of the joint pipe body 310 is formed.

[0122] In addition, the joint pipe body 310 includes a connecting portion 315 that is a tubular body connecting between the plurality of pipe accommodating portions 311. The connecting portion 315 has a pipe body shape with a diameter smaller than that of the plurality of pipe accommodating portions 311, but the length of the connecting portion 115 is not necessarily limited to the form shown in the figure, and can have a length longer or shorter than this. The connecting portion 115 can have various shapes such as an "L" shape and a "Y" shape according to the embodiment.

[0123] The plurality of seal members 120 are inserted at both ends of the joint pipe body 310 to seal between both ends of the joint pipe body 310 and the plurality of pipes 10.

[0124] And the joint pipe according to an embodiment of the present invention includes a plurality of fixed cap assemblies 130 that connect and fix between the joint pipe body 310 and the plurality of pipes 10. The fixed cap assembly 130 includes a fixed cap 140, a washer 160, and a fastening member 180.

[0125] Here, the description of the fixed cap assembly 130 is omitted because it overlaps with the content described with reference to FIGS. 1 to 10 above.

[0126] As described above, according to the embodiment of the present invention, by connecting the pipes with a strong tightening force, there is an advantage that water tightness can be ensured even under high water pressure conditions, and detachment of the pipes can be prevented.

[0127] Also, according to the embodiment of the present invention, by connecting the pipes with a strong tightening force, water tightness can be ensured even under high water pressure conditions, and detachment of the pipes can be prevented.

[0128] Also, according to the embodiment of the present invention, a fitting groove is provided on the inner peripheral surface of the washer, and a plurality of tooth-shaped protrusions each in a divided form are directly assembled into the fitting groove, or a plurality of tooth-shaped protrusions are integrally connected to a ring-shaped body inserted into the fitting groove, thereby forming a tightening member for tightening the pipe. According to this, the present invention has a relatively simple structure, and the shapes of the washer and the tightening member are not exposed outside the fixed cap, which has the advantage of excellent aesthetic appearance. Just by fastening the fixed cap alone, the washer can contract, and the tightening member can strongly press the outer peripheral surface of the pipe, and the connection strength of the pipe can be improved.

[0129] As described above, the present invention has been described with reference to the exemplary drawings. However, the present invention is not limited by the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

Claims

1. A fixing cap fastened to a connecting part of a main body to which at least one pipe is connected to fix between the main body and the pipe; A washer located inside the fixing cap, which compresses a sealing member interposed between the main body and the pipe by fastening the fixing cap, and contracts and restores radially by rotation of the fixing cap; and, A fastening member including a plurality of tooth-shaped protrusions that protrude radially from the inner peripheral surface of the washer toward the outer peripheral surface of the pipe and press the outer peripheral surface of the pipe to fix the pipe by contraction of the washer, and a ring-shaped body inserted into the inner peripheral surface of the washer and contracting and restoring radially corresponding to the washer; The washer is A first annular body located forward with respect to the fastening direction of the fixing cap, having a circular fitting groove provided on an inner peripheral surface for fitting the ring-shaped body by contracting and restoring radially; A second annular body connected to the rear end of the first annular body with respect to the fastening direction of the fixing cap and having a diameter smaller than that of the first annular body; The first annular body is cut open in a straight line at set intervals along the circumferential direction, and includes a plurality of gaps where the end portion on the fastening direction side of the first annular body is cut open; The outer peripheral surface of the first annular body is further provided with wedge-shaped protrusions protruding obliquely downward toward the fastening direction of the fixing cap, and is characterized in that Fixing cap assembly.

2. Each of the plurality of tooth-shaped protrusions of the fastening member One end is connected circumferentially via a predetermined interval groove inside the ring-shaped body, and the other end protrudes in a sawtooth shape toward the outer peripheral surface of the pipe, and is characterized in that The fixing cap assembly according to claim 1.

3. Between each of the plurality of tooth-shaped protrusions, a plurality of interval grooves are formed at a certain distance from each other and spaced apart from each other, and are characterized in that The fixing cap assembly according to claim 2.

4. Each of the plurality of interval grooves Has a circular groove shape, and is characterized in that The fixing cap assembly according to claim 3.

5. [[ID=2l]]The ring-shaped body Is inserted into a circular fitting groove provided on the inner peripheral surface of the washer, and is characterized in that The fixing cap assembly according to claim 2.

6. The fastening member is When the ring-shaped body contracts, an elastic connecting member that provides an elastic force necessary for restoration; and further includes The elastic connecting member is Both ends are connected to an opening portion in which a part of the circular arc section of the ring shape of the ring-shaped body is interrupted, and is made of a material that can expand and contract. The fixed cap assembly according to claim 5.

7. The tooth-shaped protrusion is It has a sharp portion whose cross section shrinks as it goes away from the ring-shaped body and in the protruding direction. One surface of the sharp portion is formed so as to have a bending surface that bends toward the connection direction of the pipe. The fixed cap assembly according to claim 1.

8. The plurality of tooth-shaped protrusions are Provided in a plurality of piece-like shapes separated from each other. The fixed cap assembly according to claim 1.

9. The fixed cap includes An annular cap body portion having a hollow through which the pipe is inserted; and includes The cap body portion has an inner diameter size larger than the outer diameter size of the pipe to be connected. On the outer peripheral surface of the cap body portion, a plurality of circumferential protrusions protruding at intervals in the circumferential direction are provided. On the inner peripheral surface of the cap body portion, a female screw that is screwed to the male screw portion of the main body is provided. The fixed cap assembly according to claim 1.

10. The main body is A pipe accommodating portion formed at the connecting portion of the main body to which the pipe is connected, and at least a part of the pipe is inserted; A pipe support portion formed inside the pipe accommodating portion and protruding so as to limit the insertion length of the pipe; A male screw portion formed outside the pipe accommodating portion and screwed to the female screw portion of the fixed cap; and A seal member accommodating portion formed with a step inside the pipe accommodating portion and accommodating the seal member; Including The fixed cap assembly according to claim 1.

11. The washer is formed such that the tip portion enters toward the seal member accommodating portion when the fixed cap is fastened. The seal member includes at least one elastic ring that elastically deforms so that the contact area expands between the main body and the pipe by the pressure of the tip portion of the washer in the seal member accommodating portion when the fixed cap is fastened. The fixed cap assembly according to claim 10.

12. A joint pipe body for connecting a plurality of pipes; A sealing member inserted at both ends of the joint pipe body for sealing between both ends of the joint pipe body and the pipe; and, A fixing cap screwed and fastened to both ends of the joint pipe body while surrounding the connecting portion of the pipe, A washer located inside the fixing cap, which compresses the sealing member positioned between the joint pipe body and the pipe by fastening the fixing cap, and contracts and restores radially by rotation of the fixing cap; and, A fastening member including a plurality of tooth-shaped protrusions protruding radially from the inner peripheral surface of the washer toward the outer peripheral surface of the pipe to press and fix the outer peripheral surface of the pipe by contraction of the washer, and a ring-shaped body inserted into the inner peripheral surface of the washer and contracting and restoring radially corresponding to the washer, including a fixing cap assembly, The washer, A first annular body located forward with respect to the fastening direction of the fixing cap, having a circular fitting groove provided on the inner peripheral surface for fitting the ring-shaped body by contracting and restoring radially, A second annular body connected to the rear end of the first annular body with respect to the fastening direction of the fixing cap and having a smaller diameter than the first annular body; The first annular body is cut open in a straight line at set intervals along the circumferential direction, and includes a plurality of gaps where the end portion on the fastening direction side of the first annular body is cut open, The outer peripheral surface of the first annular body is further provided with wedge-shaped protrusions protruding obliquely downward toward the fastening direction of the fixing cap, Joint pipe.

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