Assembled PVC pipe fitting

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) pipe fittings, in particular to an assembled PVC pipe fitting which comprises a middle piece, a plurality of pipelines and connecting assemblies, the middle piece is provided with a plurality of openings, the connecting assemblies are connected between the pipelines and the openings, the pipelines are communicated with one another, and the assembled PVC pipe fitting further comprises blocking pieces capable of blocking the openings. The plugging piece is detachably connected with the opening, a plurality of pipelines can be installed on the connector of the middleware through the connecting assembly according to the number of the pipelines needing to be connected, the opening, not needing to be connected with the pipelines, of the middleware is plugged through the plugging piece, and connection of the pipelines is completed. The pipelines are installed on the multiple openings in the middle piece, the openings without the pipelines are plugged through the plugging pieces, and the number of the connected pipelines can be adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to PVC pipe fitting technical field more specifically, it relates to a kind of assembled PVC pipe fittings. BACKGROUND

[0002] PVC hard polyvinyl chloride pipe is extruded by polyvinyl chloride resin and stabilizer, lubricant after cooperation using hot-pressing method, and it is the earliest plastic pipe material developed and applied, and PVC pipe fitting is a connecting piece for connecting two PVC pipe fittings, and there are various types of PVC pipe fittings, among which the splicing pipe fitting is widely used due to its easy installation; In the existing PVC pipe fitting technology, most of the assembled PVC pipe fittings are relatively simple, and cannot adjust the number of connected pipes as needed, which is monotonous and not flexible during use, and has the phenomenon of inconvenient use. SUMMARY

[0003] The utility model aims at overcoming the deficiency that the number of connected pipes cannot be adjusted in the prior art, and provides an assembled PVC pipe fitting, which can connect different numbers of pipes as needed.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of:

[0005] Provided is an assembled PVC pipe fitting, which comprises an intermediate piece, a plurality of pipes and a connecting assembly, the intermediate piece is provided with a plurality of openings, the connecting assembly is connected between the pipes and the openings, the pipes are in communication with each other, and the assembled PVC pipe fitting further comprises a blocking piece capable of blocking the openings, and the blocking piece is detachably connected to the openings.

[0006] The assembled PVC pipe fitting can connect a plurality of pipes to the openings of the intermediate piece through the connecting assembly as needed, block the openings of the intermediate piece that do not need to be connected to pipes with the blocking piece, and complete the connection of the pipes; by installing the pipes on the openings of the intermediate piece and blocking the openings that do not have pipes installed with the blocking piece, the number of connected pipes can be adjusted.

[0007] Further, the connecting assembly comprises a plurality of connecting rings, one end of the connecting ring is connected to the pipe, the other end is connected to the opening, and the blocking piece is connected to the opening. By connecting the pipe and the intermediate piece in a clamping manner, the disassembly difficulty can be reduced, and the disassembly efficiency can be improved.

[0008] Further, the outer wall of the pipe is provided with an elastic clamping block, the connecting ring is provided with a clamping groove matched with the elastic clamping block, and the elastic clamping block is clamped with the clamping groove. When installing the pipe, the connecting assembly is clamped on the intermediate piece, the pipe is inserted into the connecting ring, the elastic clamping block is deformed under the force after contacting with the end face of the connecting ring, along with the pipe sliding along the inner wall of the connecting ring, the elastic clamping block moves to the clamping groove, the elastic clamping block restores to the original shape under the action of its own elastic force, and is clamped with the clamping groove, so that the pipe is fixedly connected with the connecting ring, and the installation of the pipe is completed.

[0009] Further, the outer wall of the connecting ring is provided with a first sliding block, the intermediate piece is provided with an installation cavity communicated with the connecting ring, the inner wall of the installation cavity is provided with a sliding groove matched with the first sliding block, the first sliding block is slidingly installed in the sliding groove, the inner wall of the sliding groove is provided with a limiting groove, a limiting block is slidingly installed in the limiting groove, and an elastic piece is connected between the limiting block and the limiting groove. One end of the first sliding block in the axial direction of the connecting ring abuts against the sliding groove, and the other end abuts against the limiting block. When installing the connecting ring, the first sliding block on the connecting ring is clamped into the sliding groove, the connecting block is moved, the first sliding block slides along the sliding groove, the limiting block is pressed into the limiting groove, the elastic piece is compressed, the elastic force of the elastic piece pushes the limiting block to reset after the first sliding block slides through the limiting groove, the limiting block limits the first sliding block, prevents the connecting ring from falling off from the opening of the intermediate piece, the installation of the connecting ring is completed, the limiting block resets under the action of the elastic piece after the first sliding block slides through the limiting groove, and the reverse movement of the first sliding block is blocked, so that the automatic limiting of the connecting ring is realized, and the installation of the connecting ring is more convenient.

[0010] Further, the sliding groove comprises a first axial sliding groove, a circumferential sliding groove and a second axial sliding groove which are sequentially communicated from outside to inside, the limiting groove is arranged on the side wall of the circumferential sliding groove, and the axial side surface of the first sliding block abuts against the second axial sliding groove. When installing the connecting ring, the first sliding block is clamped into the first axial sliding groove, the connecting ring is moved to make the first sliding block move axially along the first axial sliding groove, the first sliding block is slid into the circumferential sliding groove, then the first sliding block moves circumferentially along the circumferential sliding groove, the limiting block is pressed into the limiting groove when the first sliding block slides above the limiting groove, the first sliding block is slid into the second axial sliding groove, the limiting block resets under the action of the elastic force of the elastic piece, and the first sliding block is limited between the limiting block and the bottom of the second axial sliding groove, so that the installation of the connecting ring is completed.

[0011] Further, the first sliding block is provided with a first guide surface capable of pushing the limiting block to slide along the limiting groove. The first guide surface plays a guiding role on the limiting block, so that the first sliding block can more easily push the limiting block.

[0012] Further, the limiting block is provided with a pull rod, the pull rod passes through the side wall of the intermediate piece and is in sliding connection with the intermediate piece. When the first sliding block reaches the limiting groove, the pull rod can be pulled to directly pull the limiting block into the limiting groove, and after the first sliding block slides through the limiting groove, the pull rod is released and the limiting block is reset; the limiting block is moved by pulling the pull rod, so that the process of inserting the connecting ring into the intermediate piece is more labor-saving, and the abrasion caused by the collision and friction between the first sliding block and the limiting block is reduced.

[0013] Further, the elastic member is a spring, and the elastic member is sleeved on the pull rod. When the first sliding block reaches the limiting groove, the pull rod is pulled, the limiting block presses the spring, and moves to the bottom of the limiting groove, after the first sliding block slides through the limiting groove, the pull rod is released, and the spring in the compressed state pushes the limiting block to reset; during the resetting process of the spring, the pull rod can improve the stability of the movement of the spring, so that the direction of the elastic force exerted by the spring on the limiting block is more stable.

[0014] Further, the inner wall of the connecting ring is provided with a sealing assembly, and the sealing assembly is in abutment with the pipeline. The sealing assembly improves the sealing property between the pipeline and the connecting ring, and prevents leakage during use.

[0015] Further, the sealing assembly comprises a convex ring arranged on the inner wall of the connecting ring and a sealing ring mounted on the outer side of the convex ring, and the end face of the pipeline is in abutment with the sealing ring. The outer side of the convex ring is a side of the convex ring away from the opening of the intermediate piece; when the elastic clamping block of the pipeline is clamped into the clamping groove of the connecting ring, the end face of the pipeline inserted into the connecting ring is in abutment with the sealing ring, so that the sealing between the pipeline and the connecting ring is realized.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The utility model discloses a spliced PVC pipe fitting: 1, through installing pipeline on the opening of intermediate piece, the number of connecting pipeline can be adjusted by plugging the opening without installing pipeline with plugging piece;2, pipeline and intermediate piece can be connected through the clamping mode, which can reduce the dismounting difficulty and improve the dismounting efficiency;3, after the first sliding block slides through the limiting groove, the limiting block resets under the action of the elastic member, blocks the reverse movement of the first sliding block, realizes the automatic limiting of the connecting ring, and makes the installation of the connecting ring more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the spliced PVC pipe fitting of the utility model;

[0019] Figure 2 It is a structural schematic view of the connecting ring of the spliced PVC pipe fitting of the utility model;

[0020] Figure 3It is the structure schematic view of the connecting ring and the intermediate piece of the assembled PVC pipe fitting of the utility model.

[0021] Figure 4 It is the structure schematic view of the sliding groove of the assembled PVC pipe fitting of the utility model.

[0022] In the drawing: 1, intermediate piece;11, sliding groove;111, first axial sliding groove;112, circumferential sliding groove;113, second axial sliding groove;114, limiting groove;12, limiting block;121, pull rod;122, elastic piece;2, pipeline;21, elastic clamping block;3, connecting ring;31, clamping groove;32, first sliding block;321, first guide surface;33, convex ring;34, sealing ring;4, plugging piece. DETAILED DESCRIPTION

[0023] The utility model will be further explained in combination with specific implementation manners. Among them, the drawing is only used for example explanation, and the representation is only a schematic diagram, and cannot be understood as the limitation of the patent; In order to better illustrate the embodiment of the utility model, some components of the drawing will be omitted, enlarged or reduced, and the size of the actual product is not represented; For those skilled in the art, it is understandable that some known structures and their description in the drawing can be omitted.

[0024] The same or similar reference numerals in the drawing of the embodiment of the utility model correspond to the same or similar components; In the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or position relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore the position relationship description in the drawing is only used for example explanation, and cannot be understood as the limitation of the patent, for the ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0025] Embodiment one

[0026] As Figures 1 to 4 The first embodiment of the assembled PVC pipe fitting of the utility model, including intermediate piece 1, several pipelines 2 and connecting assembly, the intermediate piece 1 is equipped with multiple openings, several connecting assemblies are connected between the pipeline 2 and the opening, several pipeline 2 are communicated with each other, and further include plugging piece 4 capable of plugging the opening, and the plugging piece 4 is detachably connected with the opening.

[0027] The utility model discloses a kind of assembled PVC pipe fittings, and the number of pipeline 2 can be connected according to needs, connect several pipelines 2 by connecting assembly and install to the opening of intermediate piece 1, the opening of intermediate piece 1 is not needed to connect pipeline 2 by plugging piece 4, and the connection of pipeline 2 is completed;By installing pipeline 2 on several openings on intermediate piece 1, the opening without installing pipeline 2 is plugged by plugging piece 4, and the number of connected pipeline 2 can be adjusted.

[0028] Connecting assembly includes several connecting rings 3, one end of connecting ring 3 is connected with the pipeline 2, the other end is connected with the opening, and the plugging piece 4 is connected with the opening. By the way of clamping, pipeline 2 and intermediate piece 1 can be connected, which can reduce the disassembly difficulty and improve the disassembly efficiency.

[0029] In the embodiment, the intermediate piece 1 is a cube structure, and the intermediate piece 1 is provided with six openings, and the six openings are respectively arranged on the six faces of the cube. The intermediate piece 1, the pipeline 2, the connecting ring 3 and the plugging piece 4 are all PVC structures. As shown in Figure 1 .

[0030] As shown in Figure 1 , the outer wall of the pipeline 2 is provided with an elastic clamping block 21, the connecting ring 3 is provided with a clamping groove 31 matched with the elastic clamping block 21, and the elastic clamping block 21 is clamped with the clamping groove 31. When installing the pipeline 2, the connecting assembly is clamped on the intermediate piece 1, the pipeline 2 is inserted into the connecting ring 3, the elastic clamping block 21 is deformed under the force after contacting the end face of the connecting ring 3, and the elastic clamping block 21 moves to the clamping groove 31 when the pipeline 2 slides along the inner wall of the connecting ring 3. The elastic clamping block 21 restores its shape under the action of its own elastic force, is clamped with the clamping groove 31, the pipeline 2 and the connecting ring 3 are fixedly connected, and the installation of the pipeline 2 is completed.

[0031] The inner wall of the connecting ring 3 is provided with a sealing assembly, and the sealing assembly abuts against the pipeline 2. The sealing assembly improves the sealing between the pipeline 2 and the connecting ring 3, and prevents leakage during use.

[0032] As shown in Figure 2 , the sealing assembly includes a convex ring 33 arranged on the inner wall of the connecting ring 3 and a sealing ring 34 installed on the outer side of the convex ring 33, and the end face of the pipeline 2 abuts against the sealing ring 34. The outer side of the convex ring 33 is the side of the convex ring 33 away from the opening of the intermediate piece 1; when the elastic clamping block 21 of the pipeline 2 is clamped into the clamping groove 31 of the connecting ring 3, the end face of the pipeline 2 inserted into the connecting ring 3 abuts against the sealing ring 34, and the sealing between the pipeline 2 and the connecting ring 3 is realized. In the embodiment, the sealing ring 34 is a rubber ring.

[0033] The working principle of the assembled PVC pipe fitting of the embodiment is as follows: according to the number of pipes 2 to be connected, a plurality of pipes 2 are installed on the interfaces of the intermediate piece 1 through the connecting assemblies, for example, five pipes 2 are connected, five connecting rings 3 are clamped on the openings of the five faces of the intermediate piece 1 respectively, the blocking piece 4 is clamped on the opening of the intermediate piece 1 which does not need to be connected with the pipe 2, the pipe 2 is inserted into the connecting ring 3, the elastic clamping block 21 is deformed under the force after being in contact with the end face of the connecting ring 3, along with the pipe 2 sliding along the inner wall of the connecting ring 3, until the elastic clamping block 21 is clamped in the clamping groove 31, so that the pipe 2 is fixedly connected with the connecting ring 3, the installation of the pipe 2 is completed, at this time, the end face of the pipe 2 inserted into the connecting ring 3 is in abutment with the sealing ring 34, so that the sealing between the pipe 2 and the connecting ring 3 is realized; when the pipe 2 needs to be disassembled, the pipe 2 is pulled in the reverse direction, so that the elastic clamping block 21 is deformed and separated from the clamping groove 31, the pipe 2 is separated from the connecting ring 3, and the disassembly is completed.

[0034] Embodiment two

[0035] The embodiment is a second embodiment of the assembled PVC pipe fitting of the utility model, which is similar to the first embodiment, and the difference lies in that, as shown in Figure 2 and Figure 3 the outer wall of the connecting ring 3 is provided with a first sliding block 32, the intermediate piece 1 is provided with an installation cavity which is in communication with the connecting ring 3, the inner wall of the installation cavity is provided with a sliding groove 11 which cooperates with the first sliding block 32, the first sliding block 32 is slidingly installed in the sliding groove 11, the inner wall of the sliding groove 11 is provided with a limiting groove 114, the limiting groove 114 is slidingly installed with a limiting block 12, the limiting block 12 and the limiting groove 114 are connected with an elastic piece 122, one end of the first sliding block 32 along the axis direction of the connecting ring 3 is in abutment with the sliding groove 11, and the other end is in abutment with the limiting block 12. When the connecting ring 3 is installed, the first sliding block 32 on the connecting ring 3 is clamped into the sliding groove 11, the connecting block is moved, the first sliding block 32 is slid along the sliding groove 11, the limiting block 12 is pressed into the limiting groove 114, the elastic piece 122 is compressed, after the first sliding block 32 slides through the limiting groove 114, the elastic force of the elastic piece 122 pushes the limiting block 12 to reset, the limiting block 12 limits the first sliding block 32, preventing the connecting ring 3 from falling off the opening of the intermediate piece 1, and the installation of the connecting ring 3 is completed; after the first sliding block 32 slides through the limiting groove 114, the limiting block 12 resets under the action of the elastic piece 122, blocking the reverse movement of the first sliding block 32, realizing the automatic limiting of the connecting ring 3, and making the installation of the connecting ring 3 more convenient.

[0036] As Figure 4As shown, the sliding groove 11 includes a first axial sliding groove 111, a circumferential sliding groove 112 and a second axial sliding groove 113 communicated in turn from outside to inside, and the limiting groove 114 is arranged on the side wall of the circumferential sliding groove 112, and the axial side surface of the first sliding block 32 abuts against the second axial sliding groove 113. When the connecting ring 3 is installed, the first sliding block 32 is clamped into the first axial sliding groove 111, the connecting ring 3 is moved to make the first sliding block 32 move axially along the first axial sliding groove 111, the first sliding block 32 is slid into the circumferential sliding groove 112, then the first sliding block 32 moves circumferentially along the circumferential sliding groove 112, when the first sliding block 32 slides above the limiting groove 114, the limiting block 12 is pressed into the limiting groove 114, the first sliding block 32 is slid into the second axial sliding groove 113, the limiting block 12 is reset under the elastic force of the elastic member 122, the first sliding block 32 is limited between the limiting block 12 and the bottom of the second axial sliding groove 113, and the installation of the connecting ring 3 is completed.

[0037] The first sliding block 32 is provided with a first guide surface 321 capable of pushing the limiting block 12 to slide along the limiting groove 114. The first guide surface 321 plays a guiding role on the limiting block 12, so that the first sliding block 32 can more easily push the limiting block 12.

[0038] In the embodiment, the outer wall of the plugging member 4 is provided with a second sliding block, and the second sliding block is provided with a second guide surface capable of pushing the limiting block 12 to slide along the limiting groove 114. When the opening of the intermediate member 1 is plugged by the plugging member 4, the second sliding block is slid into the sliding groove 11, the second sliding block reaches the limiting groove 114, the second guide surface contacts the limiting block 12, the limiting block 12 is pressed into the limiting groove 114, and after the second sliding block slides through the limiting groove 114, the limiting block 12 is reset to limit the second sliding block, and the installation of the plugging member 4 is completed.

[0039] The working principle of the assembled PVC pipe fitting of the embodiment is as follows: when the connecting ring 3 is installed, the first sliding block 32 is clamped into the first axial sliding groove 111, the connecting ring 3 is moved to make the first sliding block 32 move axially along the first axial sliding groove 111; after the first sliding block 32 is slid into the circumferential sliding groove 112, the first sliding block 32 moves circumferentially along the circumferential sliding groove 112, when the first sliding block 32 slides above the limiting groove 114, the first guide surface 321 contacts the limiting block 12 to generate a radial force on the limiting block 12, and the limiting block 12 is pressed into the limiting groove 114; the first sliding block 32 is slid into the second axial sliding groove 113, the limiting block 12 is no longer blocked by the first sliding block 32, the limiting block 12 is ejected from the limiting groove 114 under the elastic force of the elastic member 122, and is reset, so that when the first sliding block 32 moves reversely, the first sliding block 32 is blocked by the limiting block 12; the first sliding block 32 is limited between the limiting block 12 and the bottom of the second axial sliding groove 113, and the installation of the connecting ring 3 is completed.

[0040] When installing the blocking piece 4, the second sliding block is clamped into the first axial sliding groove 111, the blocking piece 4 is moved to make the second sliding block move axially along the first axial sliding groove 111, the second sliding block slides into the circumferential sliding groove 112 to make the second sliding block move circumferentially along the circumferential sliding groove 112, when the second sliding block slides to above the limiting groove 114, the second guide surface contacts the limiting block 12 to press the limiting block 12 into the limiting groove 114, the second sliding block slides into the second axial sliding groove 113, the second sliding block no longer blocks the limiting block 12, the limiting block 12 is reset under the elastic force of the elastic member 122, the second sliding block is limited between the limiting block 12 and the bottom of the second axial sliding groove 113, and the installation of the blocking piece 4 is completed.

[0041] Embodiment three

[0042] The embodiment is a third embodiment of the assembled PVC pipe fitting, is similar to the second embodiment, and differs from the second embodiment in that, as shown in Figure 3 When the first sliding block 32 reaches the limiting groove 114, the pull rod 121 can be pulled to directly pull the limiting block 12 into the limiting groove 114, and after the first sliding block 32 slides through the limiting groove 114, the pull rod 121 is released, and the limiting block 12 is reset; the process of inserting the connecting ring 3 into the intermediate piece 1 is more labor-saving by moving the limiting block 12 by pulling the pull rod 121, and the abrasion caused by the collision and friction between the first sliding block 32 and the limiting block 12 is reduced.

[0043] As shown in Figure 3 The elastic member 122 is a spring, and the elastic member 122 is sleeved on the pull rod 121. When the first sliding block 32 reaches the limiting groove 114, the pull rod 121 is pulled, the limiting block 12 is pressed, and the limiting block 12 moves to the bottom of the limiting groove 114, and after the first sliding block 32 slides through the limiting groove 114, the pull rod 121 is released, and the limiting block 12 is reset under the push of the spring in the compressed state; during the resetting process of the spring, the pull rod 121 can improve the stability of the movement of the spring, and the direction of the elastic force of the spring on the limiting block 12 is more stable.

[0044] In the specific contents of the above specific embodiments, any non-contradictory combination of technical features can be combined, in order to make the description simple, not all possible combinations of the above technical features are described, however, as long as the combination of these technical features does not exist, it should be considered that it is within the scope of the description.

[0045] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A fabricated PVC pipe fitting, characterized by, The utility model provides a pipeline connection device, including middleware (1), a plurality of pipe (2) and connecting assembly, a plurality of openings are equipped on the middleware (1), a plurality of connecting assembly are connected between the pipe (2) with the opening, a plurality of pipe (2) intercommunication, still include the obturator (4) of being able to obturating the opening, the obturator (4) is detachably connected with the opening.

2. The fabricated PVC pipe fitting according to claim 1, wherein, The connecting assembly includes a plurality of connecting rings (3), one end of the connecting ring (3) is clamped with the pipe (2), the other end is clamped with the opening, and the obturator (4) is clamped with the opening.

3. The fabricated PVC pipe fitting according to claim 2, wherein, The outer wall of the pipe (2) is provided with an elastic clamping block (21), the connecting ring (3) is provided with a clamping groove (31) matched with the elastic clamping block (21), and the elastic clamping block (21) is clamped with the clamping groove (31).

4. The fabricated PVC pipe fitting according to claim 2 or 3, wherein, The outer wall of the connecting ring (3) is provided with a first sliding block (32), the inner wall of the installation cavity is provided with a sliding groove (11) matched with the first sliding block (32), the first sliding block (32) is slidingly installed in the sliding groove (11), the inner wall of the sliding groove (11) is provided with a limiting groove (114), the limiting block (12) is slidingly installed in the limiting groove (114), the elastic element (122) is connected between the limiting block (12) and the limiting groove (114), one end of the first sliding block (32) along the axis direction of the connecting ring (3) abuts against the sliding groove (11), and the other end abuts against the limiting block (12).

5. The fabricated PVC pipe fitting according to claim 4, wherein, The sliding groove (11) includes a first axial sliding groove (111), a circumferential sliding groove (112) and a second axial sliding groove (113) communicated in sequence from outside to inside, the limiting groove (114) is arranged on the side wall of the circumferential sliding groove (112), and the axial side surface of the first sliding block (32) abuts against the second axial sliding groove (113).

6. The fabricated PVC pipe fitting according to claim 4, wherein, The first sliding block (32) is provided with a first guide surface (321) capable of sliding the limiting block (12) along the limiting groove (114).

7. The fabricated PVC pipe fitting according to claim 4, wherein, The limiting block (12) is provided with a pull rod (121), and the pull rod (121) penetrates through the side wall of the middleware (1) and is slidingly connected with the middleware (1).

8. The fabricated PVC pipe fitting according to claim 7, wherein, The elastic element (122) is a spring, and the elastic element (122) is sleeved on the pull rod (121).

9. The fabricated PVC pipe fitting according to claim 2 or 3, wherein, The inner wall of the connecting ring (3) is provided with a sealing assembly, and the sealing assembly abuts against the pipe (2).

10. The fabricated PVC pipe fitting according to claim 9, wherein, The sealing assembly includes a convex ring (33) arranged on the inner wall of the connecting ring (3) and a sealing ring (34) installed outside the convex ring (33), and the end surface of the pipe (2) abuts against the sealing ring (34).

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