Quickly-assembled pipe joint and pipe puller

Abstract

The utility model discloses a quick-assembly type pipe joint and a pipe drawing device, and relates to the technical field of pipeline joints, the quick-assembly type pipe joint comprises a pipe body assembly, the pipe body assembly comprises a circulation pipe body, the circulation pipe body comprises at least two ports, and joint pipe bodies with the diameter larger than that of the circulation pipe body are arranged on the ports of the circulation pipe body; the fastening assembly is located in the connector pipe body and comprises an elastic reset piece and a locking unit which is located at the end, away from the circulation pipe body, of the elastic reset piece and can transversely move in the connector pipe body; each locking unit comprises a locking lantern ring with the diameter gradually decreased from inside to outside and a plurality of locking clamping teeth located on the inner circumferential wall of the locking lantern ring, and each locking clamping tooth comprises a plurality of inward clamping tooth parts arranged in the axial direction of the locking lantern ring. The clamping teeth of the inward clamping tooth parts incline towards the flowing pipe body, and the extending lengths of the clamping teeth of the inward clamping tooth parts are sequentially decreased from inside to outside. And the inward clamping tooth parts can clamp the outer walls of the pipelines to be connected, so that the pipeline splicing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe joints, in particular to a quick-install pipe joint and a pipe puller. Background Art

[0002] Pipe fittings are the connection tools between pipes and serve as removable connection points between components and pipes, playing an indispensable role in pipe connection. Currently, pipe fittings are mostly connected by socket welding or threaded connections. Threaded connections are the most widely used for connections that require frequent assembly and disassembly. However, threaded fittings typically require threads to be machined into the pipe and then tightened to the threads on the fitting. Installation and disassembly of threaded fittings require multiple rotations of the pipe or fitting, which complicates the process and leads to low installation efficiency. Frequent twisting movements are particularly inconvenient for installation points with limited space, seriously impacting installation progress. Utility Model Content

[0003] The present application provides a quick-install pipe joint, a manufacturing method and a pipe puller, which can solve the problems in the prior art of the traditional compression type connection being non-detachable and the clamp type connection being slow to install.

[0004] In a first aspect, an embodiment of the present application provides a quick-install pipe joint, comprising:

[0005] A pipe assembly, the pipe assembly comprising a flow pipe, the flow pipe comprising at least two ports, the flow pipe ports being provided with a joint pipe having a diameter greater than that of the flow pipe;

[0006] a fastening assembly located in the joint tube body, the fastening assembly comprising an elastic reset member and a locking unit located at an end of the elastic reset member away from the flow tube body and capable of moving laterally within the joint tube body;

[0007] In which, the locking unit includes a locking ring whose diameter gradually decreases from the inside to the outside and a plurality of locking teeth located on the inner circumferential wall of the locking ring. The locking teeth include a plurality of inward-facing tooth portions arranged axially along the locking ring. The teeth of the inward-facing tooth portions are inclined toward the direction of the flow tube body and the extension lengths of the teeth of the plurality of inward-facing tooth portions decrease sequentially from the inside to the outside.

[0008] In combination with the first aspect, in one embodiment, the plurality of locking teeth are equidistantly arranged along the inner circumferential wall of the locking collar.

[0009] In one embodiment, the locking tooth is further provided with an outward-facing tooth portion, and the outward-facing tooth portion extends toward the inner circumferential wall of the joint pipe body.

[0010] In one embodiment, a plurality of latch tooth installation openings are provided on the circumferential wall of the locking collar, and a locking latch tooth is provided in each of the latch tooth installation openings.

[0011] In one embodiment, the elastic return member includes a return spring.

[0012] In one embodiment, the return spring is provided with a spring compression ring near one end of the flow tube body.

[0013] In one embodiment, the spring compression ring includes a supporting ring for supporting the inner wall of the joint tube body and a fixing ring for entering the reset spring coil body.

[0014] In one embodiment, a sealing unit is provided in the joint tube body and is located at one end of the fastening assembly close to the flow tube body.

[0015] In one embodiment, the sealing unit includes a plurality of sealing rings arranged at intervals, and a sealing ring pressure ring is provided between every two adjacent sealing rings.

[0016] In a second aspect, an embodiment of the present application provides a tube puller for removing the above-mentioned quick-release pipe joint. The tube puller includes two arc-shaped fittings, each of which has a curved thin plate on one side thereof facing the same direction as the curved surface of the arc-shaped fitting. The two arc-shaped fittings are detachably connected to form a ring, and the two curved thin plates form a cylindrical body for fitting against the outer wall of the pipe to be connected.

[0017] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0018] The quick-install pipe joint in the present application is provided with a locking collar in the two joint tube bodies and an inward-facing locking tooth portion on the locking collar. During the pipe splicing process, the inward-facing locking tooth portion can tightly engage the outer circumferential wall of the pipe to be connected to prevent the pipe to be connected from falling off. Compared with the traditional threaded connection method, the splicing process is simplified and the pipe splicing efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A front view of a quick-install pipe joint provided in an embodiment of the present application;

[0021] Figure 2A cross-sectional view of a quick-install pipe joint provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of a locking tooth structure in a quick-install pipe joint provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the position of the latching tooth installation opening in a quick-install pipe joint provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of a return spring and a spring compression ring in a quick-release pipe joint provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of a tube extractor provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of an implementation of a flow tube body in a quick-install pipe joint provided in an embodiment of the present application;

[0027] Figure 8 A schematic structural diagram of a quick-install pipe joint provided in an embodiment of the present application in which the flow pipe body is a curved pipe;

[0028] Figure 9 A schematic diagram of the valve structure of a quick-install pipe joint provided in an embodiment of the present application.

[0029] In the figure: 1. circulation tube body; 2. joint tube body; 3. elastic reset member; 301. reset spring; 4. locking collar; 5. locking teeth; 501. inward-facing teeth portion; 502. outward-facing teeth portion; 6. teeth mounting opening; 7. spring pressure ring; 701. supporting ring; 702. fixing ring; 8. sealing ring; 9. sealing ring pressure ring; 10. arc-shaped fitting piece; 11. arc-shaped thin plate; 12. dust ring; 13. valve. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The embodiments of the present application provide a quick-install pipe joint and a pipe puller, which can solve the problems in the prior art of the traditional compression-type connection being non-detachable and the clamp-type connection being slow to install.

[0032] In the first aspect, an embodiment of the present application provides a quick-install pipe joint, which includes a pipe body assembly and a fastening assembly. The pipe body assembly is integrally connected and is mainly used to connect multiple pipes to be connected respectively. The fastening assembly is arranged in the pipe body assembly and can replace the threaded connection method in traditional technology to stably fix the pipes to be connected to the pipe body assembly.

[0033] Specifically, Figure 1 A front view of a quick-install pipe joint provided in an embodiment of the present application, as shown in FIG. Figure 1 As shown, the pipe assembly includes a flow pipe body 1, which includes at least two ports. The ports of the flow pipe body 1 are provided with a joint pipe body 2 having a diameter larger than that of the flow pipe body 1. In actual use, the shape of the flow pipe body 1 can be various. Figure 8 This is a schematic diagram of an implementation of a flow pipe body in a quick-install pipe joint provided in an embodiment of the present application. Figure 9 A schematic diagram of the structure of a quick-install pipe joint provided in an embodiment of the present application when the flow pipe body is a bend pipe, as shown in FIG. Figure 8 、 Figure 9 As shown, depending on the actual installation situation, the flow tube body 1 generally has two or three ports, and each port of the flow tube body 1 is provided with a joint tube body 2. Furthermore, the flow tube body 1 can be a straight tube or a curved tube with a certain angle, which can be 45° or 90°, and is not specifically limited in this application. The inner diameter of the port of the flow tube body 1 is slightly smaller than the outer diameter of the pipe body 2 to be connected. The butt ends of multiple pipes to be connected can pass through the joint tube body 2 and enter the flow tube body 1 to form a passage.

[0034] Furthermore, as an optional embodiment, when the circulation tube body 1 has two ports, a valve 13 is provided on the tube body of the circulation tube body 1 to facilitate subsequent maintenance and repair.

[0035] Furthermore, each fastening assembly in the quick-install pipe joint in the present application is a plurality of groups, and each group of fastening assemblies is located in a joint pipe body 2. Figure 2 A cross-sectional view of a quick-install pipe joint provided in an embodiment of the present application, such as Figure 2 As shown, the fastening assembly includes an elastic reset member 3 and a locking unit located at an end of the elastic reset member 3 away from the circulation pipe body 1 and capable of moving laterally within the joint pipe body 2.

[0036] The elastic reset member 3 and the locking unit are arranged in sequence from the inside to the outside. It should be noted here that the "inside" in the text refers to the direction close to the circulation tube body 1, and the "outside" refers to the direction close to the joint tube body 2. It will not be repeated later. When taking over the pipe, the end of the pipe to be connected passes through the locking unit for locking. Due to the inward thrust applied to the pipe to be connected, the pipe to be connected will drive the locking unit to move a certain distance toward the direction of the circulation tube body 1 and compress the elastic reset member 3. When the pipe to be connected enters the circulation tube body 1, the pipe to be connected is released so that the inward thrust applied thereto disappears. The automatic reset property of the elastic reset member 3 can push the locking unit back to its original position. At this point, the pipe connection work is completed.

[0037] Furthermore, the locking unit includes a locking ring 4 whose diameter decreases from the inside to the outside and a plurality of locking teeth 5 located on the inner circumferential wall of the locking ring 4. The locking teeth 5 include a plurality of inward-facing tooth portions 501 arranged axially along the locking ring 4. The teeth of the plurality of inward-facing tooth portions 501 extend toward the center of the locking ring 4 and the extension length of the teeth of the plurality of inward-facing tooth portions 501 decreases from the inside to the outside.

[0038] The inner diameter of the end portion of the connector body 2 is smaller than the outer diameter of the locking collar 4 to prevent the locking collar 4 from falling out of the connector body 2. The diameter of one end of the connector body 2 decreases in a sloped manner. The inward-facing locking teeth 501 are arranged on the inner circumferential wall of the locking collar 4 and extend beyond the inner circumferential surface of the locking collar 4 and tilt toward the flow pipe body 1, thereby preventing the connected pipe from falling out. The length of the inward-facing locking teeth 501 matches the shape of the connector body 2, that is, the further away from the flow pipe body 1, the smaller the tooth height of the inward-facing locking teeth 501. At this time, combined with the varying diameter of the locking collar 4, the teeth heights of the multiple inward-facing locking teeth 501 are located on the same horizontal plane to clamp the outer wall of the connected pipe. When the connected pipe is inserted into the locking collar 4, the protruding shape of the inward-facing locking teeth 501 securely engages the outer wall of the connected pipe, preventing the connected pipe from loosening.

[0039] Furthermore, in order to ensure uniform force, the locking teeth 5 are provided in multiple groups, and the multiple groups of locking teeth 5 are arranged equidistantly along the inner circumferential wall of the locking collar 4. After assembly is completed, the multiple groups of locking teeth 5 cooperate with each other to jointly lock the outer circumferential wall of the pipe to be connected, which can improve the connection stability between the pipe to be connected and the quick-install pipe joint in this application.

[0040] Further, Figure 3 This is a structural diagram of a locking tooth 5 in a quick-install pipe joint provided in an embodiment of the present application, as shown in FIG. Figure 3As shown, the locking tooth 5 is further provided with an outward-facing tooth portion 502, which extends toward the inner circumferential wall of the joint pipe body 2. The outward-facing tooth portion 502 extends in the opposite direction to the inward-facing tooth portion 501. After assembly, the outward-facing tooth portion 502 is primarily used to abut the inner circumferential wall of the joint pipe body 2, preventing abnormal rotation between the locking tooth 5 and the joint pipe body 2, which would affect the connection stability of the pipes to be connected. As an optional embodiment, the longitudinal cross-section of the outward-facing tooth portion 502 is an inverted triangle, with one corner of the inverted triangle facing the inner circumferential wall of the joint pipe body 2 and abutting the inner circumferential wall of the joint pipe body 2 after assembly.

[0041] Further, Figure 4 This is a schematic diagram of the position of the tooth installation port 6 in a quick-install pipe joint provided in an embodiment of the present application, as shown in FIG. Figure 4 As shown, a plurality of latch tooth mounting openings 6 are provided on the circumferential wall of the locking collar 4, and a locking latch tooth 5 is provided in each latch tooth mounting opening 6. In one embodiment of the present application, the latch tooth mounting opening 6 is in the shape of an elongated strip and passes through the circumferential wall of the locking collar 4. In the absence of external force, the outward latch tooth portion 502 on the locking latch tooth 5 extends out of the latch tooth mounting opening 6. After assembly is completed, the outward latch tooth portion 502 abuts against the inner circumferential wall of the joint pipe body 2.

[0042] Furthermore, the elastic return member 3 includes a return spring 301. The return spring 301 is provided with a spring compression ring 7 at one end near the circulation tube body 1. When the pipe to be connected is continuously extended into the locking collar 4, the locking collar 4 will be pushed to translate toward the direction of the return spring 301. The spring compression ring 7 is located at the end of the return spring 301 away from the locking collar 4, which can fix the return spring 301 and act as a reaction force. When the butt end of the pipe to be connected enters the circulation tube body 1 and engages with the circulation tube body 1, the inward thrust on the pipe to be connected is released, and the automatic reset of the return spring 301 will push the locking collar 4 to move outward so that the locking collar 4 returns to its initial position.

[0043] Further, Figure 5 This is a schematic structural diagram of a return spring 301 and a spring compression ring 7 in a quick-install pipe joint provided in an embodiment of the present application, as shown in FIG. Figure 5As shown, the spring compression ring 7 includes a supporting ring 701 for supporting the inner wall of the joint pipe body 2 and a fixing ring 702 for entering the circle body of the reset spring 301. The outer circumferential wall of the supporting ring 701 is fixed to the inner circumferential wall of the joint pipe body 2 to fix the position of the reset spring 301. The fixing ring 702 is located on the side of the supporting ring 701 facing the reset spring 301 and forms a whole with the fixing ring 702. The fixing ring 702 enters the circle body of the reset spring 301 and engages with the circle body of the reset spring 301 to prevent relative displacement between the reset spring 301 and the spring compression ring 7 caused by the pressure of the pipeline to be connected during the pipeline connection work, thereby affecting the connection stability of the pipeline.

[0044] Furthermore, a sealing unit is provided in the joint pipe body 2, which is located at one end of the fastening assembly close to the flow pipe body 1. Figure 2 As an optional embodiment, the sealing unit in the present application includes a plurality of sealing rings 8 arranged at intervals, and a sealing ring pressure ring 9 is provided between each two adjacent sealing rings 8 to fix the position of the sealing ring 8 and prevent the sealing ring 8 from displacement. As an optional embodiment, the sealing ring 8 in the present application is preferably made of rubber material, which has excellent weather resistance, can resist atmospheric aging, and ensure stable performance during long-term use. Furthermore, a sealing ring retaining ring is also provided in the joint pipe body 2 near one end of the circulation pipe body 1. The sealing ring retaining ring is located on the innermost side of the joint pipe body 2 and also serves as a limiting member of the sealing unit.

[0045] For further information, see Figure 2 As an optional embodiment, a dust ring 12 is provided at the outer end of the joint pipe body 2. The fixation of the pipe to be connected mainly relies on the locking ring 4 and the inward-facing tooth portion 501 therein. Therefore, the diameter of the port portion of the joint pipe body 2 will be larger than the diameter of the pipe to be connected. After the assembly is completed, there will be a certain gap between the inner circumferential wall of the port portion of the joint pipe body 2 and the outer circumferential wall of the pipe to be connected. The dust ring 12 is provided in the gap between the inner circumferential wall of the port portion of the joint pipe body 2 and the outer circumferential wall of the pipe to be connected, which can prevent dust and other impurities from entering. At the same time, the dust ring 12 can also play a certain sealing role.

[0046] The quick-install pipe joint in the present application is used as follows: a suitable pipe joint is selected according to the diameter of the pipe to be connected, and then one end of the pipe to be connected is inserted into the locking collar 4 and pushed inward. At this time, the inward-facing tooth portion 501 of the locking tooth 5 locks the outer circumferential wall of the pipe to be connected, and the outward-facing tooth portion 502 of the locking tooth 5 abuts against the inner circumferential wall of the joint pipe body 2 to prevent the locking collar 4 from rotating. As the pipe to be connected continues to penetrate deeper, the butt end of the pipe to be connected passes through the sealing unit and enters the circulation pipe body 1 and finally engages with the circulation pipe body 1 to complete the docking. At this time, the inward thrust of the pipe to be connected is released, and the elastic potential energy of the reset spring 301 pushes the locking collar 4 back into place. At this point, the pipe assembly is completed.

[0047] The quick-install pipe joint in the present application is provided with a locking collar 4 inside the two joint pipe bodies 2, and an inward-facing locking tooth portion 501 is provided on the locking collar 4. During the pipe splicing process, the inward-facing locking tooth portion 501 can tightly engage the outer circumferential wall of the pipe to be connected to prevent it from falling off. Compared with the traditional threaded connection method, the splicing process is simplified and the pipe splicing efficiency is improved.

[0048] In a second aspect, an embodiment of the present application further provides a tube puller for quickly removing the aforementioned quick-release pipe joint.

[0049] Specifically, Figure 6 A schematic diagram of the structure of a tube extractor provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the tube puller in the embodiment of the present application includes two arcuate fitting pieces 10, and each arcuate fitting piece 10 is provided with an arcuate thin plate 11 on one side thereof, which is aligned with the arc surface of the arcuate fitting piece 10. The two arcuate fitting pieces 10 are detachably connected to form a ring, and the two arcuate thin plates 11 form a cylindrical body for fitting the outer wall of the pipe to be connected.

[0050] The tube puller in the embodiment of the present application is entirely made of metal. Two curved plates are detachably connected to form a ring, which is used to fit over the pipe body of the pipe to be connected before it enters the quick-release pipe fitting. The curved surface orientation and curvature of the curved thin plate 11 are consistent with those of the curved fitting piece 10. The inner diameter of the cylinder formed by the two curved thin plates 11 is slightly larger than the outer diameter of the pipe to be connected. After assembly, the inner wall of the cylinder fits against the outer wall of the pipe to be connected, and the tube puller can be moved along the pipe to be connected. In one embodiment of the present application, one end of the two curved fitting pieces 10 is rotatably connected, and the other end of the two curved fitting pieces 10 is detachably connected.

[0051] When removing the pipe, the pipe puller is slid so that the barrel formed by the two arc-shaped thin plates 11 in the pipe puller enters the gap between the inner circumferential wall of the end portion of the joint pipe body 2 and the outer circumferential wall of the pipe to be connected. Then, the pipe puller is pushed inward. Since the inward-facing locking teeth 501 are inclined toward the flow pipe body 1, the barrel can be easily extended between the inward-facing locking teeth 501 and the wall of the pipe to be connected until the lock between the inward-facing locking teeth 501 and the pipe to be connected is loosened. Since the inner wall of the barrel is smooth, the pipe can be directly pulled out.

[0052] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0054] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A quick-install pipe joint, characterized in that: include: A pipe body assembly, the pipe body assembly comprising a circulation pipe body (1), the circulation pipe body (1) comprising at least two ports, and a joint pipe body (2) having a diameter larger than that of the circulation pipe body (1) being provided on the ports of the circulation pipe body (1); A fastening assembly located in the joint tube body (2), the fastening assembly comprising an elastic reset member (3) and a locking unit located at one end of the elastic reset member (3) away from the circulation tube body (1) and capable of moving laterally within the joint tube body; The locking unit comprises a locking collar (4) whose diameter gradually decreases from the inside to the outside and a plurality of locking teeth (5) located on the inner circumferential wall of the locking collar (4); the locking teeth (5) comprise a plurality of inward-facing tooth portions (501) arranged axially along the locking collar (4); the teeth of the inward-facing tooth portions (501) are inclined toward the flow tube body (1); and the extending lengths of the teeth of the plurality of inward-facing tooth portions (501) decrease in sequence from the inside to the outside.

2. A quick-install pipe joint according to claim 1, characterized in that: A plurality of locking teeth (5) are arranged at equal distances along the inner circumferential wall of the locking collar (4).

3. A quick-install pipe joint according to claim 2, characterized in that: The locking tooth (5) is further provided with an outward-facing tooth portion (502), and the outward-facing tooth portion (502) extends toward the inner circumferential wall of the joint pipe body (2).

4. A quick-install pipe joint according to claim 1, characterized in that: A plurality of latching tooth installation openings (6) are provided on the circumferential wall of the locking collar (4), and a locking latching tooth (5) is provided in each of the latching tooth installation openings (6).

5. The quick-install pipe joint according to claim 1, characterized in that: The elastic return member (3) comprises a return spring (301).

6. A quick-install pipe joint according to claim 5, characterized in that: The return spring (301) is provided with a spring compression ring (7) at one end close to the circulation tube body (1).

7. A quick-install pipe joint according to claim 6, characterized in that: The spring compression ring (7) comprises a supporting ring (701) for supporting the inner wall of the joint tube body (2) and a fixing ring (702) for entering the ring body of the reset spring (301).

8. The quick-install pipe joint according to claim 1, characterized in that: A sealing unit is provided in the joint pipe body (2) and is located at one end of the fastening assembly close to the circulation pipe body (1).

9. The quick-install pipe joint according to claim 8, characterized in that: The sealing unit comprises a plurality of sealing rings (8) arranged at intervals, and a sealing ring pressure ring (9) is provided between every two adjacent sealing rings (8).

10. A tube puller for removing a quick-release pipe joint according to any one of claims 1 to 9, characterized in that: The pipe puller comprises two arc-shaped sleeve pieces (10), one side of each arc-shaped sleeve piece (10) is provided with an arc-shaped thin plate (11) with the same arc surface orientation as the arc-shaped sleeve piece (10), the two arc-shaped sleeve pieces (10) are detachably connected to form a ring, and the two arc-shaped thin plates (11) form a cylinder for fitting the outer wall of the pipe to be connected.

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