MPP pipe butt joint structure
By designing a spring arm and a limiting structure, the problems of unstable MPP pipe connection and rotation were solved, achieving stable connection and convenient disassembly, thus meeting the assembly requirements of MPP pipes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-04-03
AI Technical Summary
The existing MPP pipe connection structure has problems such as weak connection, easy detachment and rotation, and cumbersome and laborious disassembly and assembly, making it difficult to meet assembly requirements.
The design employs first and second elastic arms, and through the cooperation of the stop protrusion and the limiting groove, as well as the limiting protrusion and the disengagement groove, it achieves stable docking and convenient disassembly of the MPP tube. The cooperation of the pushing ring and the guide rod groove further enhances the ease of disassembly.
It achieves stable and reliable MPP pipe connection, and is easy to disassemble, meeting assembly requirements and improving practicality.
Smart Images
Figure CN224083113U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of MPP pipe technology, and in particular to an MPP pipe connection structure. Background Technology
[0002] MPP pipes (modified polypropylene pipes) have advantages such as high temperature resistance, external pressure resistance, and good insulation performance, and can effectively protect cables in power, communication and other fields. In the application of MPP pipes, it is often necessary to connect multiple MPP pipes end to end to meet the splicing protection requirements of a certain length of cable.
[0003] Conventionally, one end of an MPP tube is flared, and the other end has a matching plug end. The plug end of the MPP tube is inserted into the flared end of an adjacent MPP tube. While this method ensures a tight fit between the plug end and the flared end of the adjacent MPP tube, there are still issues with insecure connections leading to the separation of adjacent MPP tubes, and the possibility of relative rotation between adjacent sets of MPP tubes. Alternatively, heat fusion welding or screw fastening can be used to connect adjacent MPP tubes. However, these methods either prevent the MPP tubes from being disassembled or involve cumbersome assembly and disassembly, making them time-consuming and laborious, and difficult to meet the assembly requirements of MPP tubes. Utility Model Content
[0004] To address the aforementioned technical problems, the purpose of this utility model is to propose an MPP tube docking structure that prevents two sets of MPP tubes from easily detaching during docking and restricts their relative rotation. This ensures stable and reliable MPP tube docking, and the docking process is convenient and efficient, effectively meeting the assembly requirements of MPP tubes and demonstrating strong practicality.
[0005] The technical solution of this utility model is achieved as follows: an MPP pipe docking structure, including a pipe body;
[0006] A first elastic arm is formed on the side wall of the first end of the tube body, and a second elastic arm is formed on the side wall of the tail end; both the first elastic arm and the second elastic arm extend along the axial direction of the tube body and spring back between the inner and outer spaces of the tube body.
[0007] The outer surface of the first elastic arm is provided with a stop protrusion, and the outer surface of the first elastic arm is provided with a limiting groove extending along its length.
[0008] The inner side of the second elastic arm is provided with a limiting protrusion corresponding to the limiting groove;
[0009] A recessed space is provided on the inner side wall of the tail end of the tube body; the recessed space has a stop surface facing the head end of the tube body.
[0010] The two sets of pipe bodies are in a docking state where they are inserted end to end along the axial direction; in the docking state, the limiting protrusion and the limiting groove at the corresponding end are inserted into each other along the axial direction, and the stopping protrusion extends into the recessed space at the corresponding end and forms a limiting fit with the stopping surface in the axial direction.
[0011] Furthermore, the inner wall of the tail end of the tube body is provided with a detachment groove that extends from the port position of the tail end and communicates with the recessed space.
[0012] In the docking state, the second elastic arm has a first disengagement position that causes the limiting protrusion to disengage from the limiting groove; and in the first disengagement position, there is a second disengagement position where the two adjacent sets of tube bodies rotate relative to each other and the stop protrusion corresponds to the disengagement groove.
[0013] Furthermore, the sidewalls at both ends of the tube body are provided with notches extending axially from the port position; the first elastic arm and the second elastic arm are formed in the notches, and the elastic ends of the first elastic arm and the second elastic arm are arranged facing the port.
[0014] Furthermore, the stop protrusion has a stop mating surface arranged facing the tail end of the tube body and an inclined surface arranged away from the tail end of the tube body. The inclined surface has an inclined lower end near the head end and an inclined upper end away from the head end; in the docking state, the stop mating surface mates with the stop surface.
[0015] Furthermore, the tube body is provided with several sets of second elastic arms spaced apart along the circumferential direction; the MPP tube docking structure includes a pushing ring that is sleeved on the tail end of the tube body and moves axially; a protrusion is provided on the outer side of the second elastic arm; a guide groove is provided on the protrusion; the guide groove is inclined and has two ends spaced apart along the length direction of the tube body, the first end being close to the tube body and the second end being away from the tube body; a guide rod is provided on the pushing ring corresponding to each second elastic arm; the guide rod is slidably connected to the guide groove in the extension direction of the guide groove, and forms a limiting fit with the guide groove in the inner and outer directions of the tube body.
[0016] Furthermore, a stepped surface is provided on the inner side wall of the tail end of the tube body; in the docking state, the end face of the head end of one of the two adjacent tube bodies abuts and engages with the stepped surface.
[0017] Furthermore, an elastic sealing ring is provided between the first end of the tube body and the stepped surface.
[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0019] 1. This utility model utilizes the combined use of a first elastic arm and a second elastic arm, allowing the head end of the tube body to be inserted into the tail end of an adjacent tube body for docking. During docking, the stop protrusion on the first elastic arm and the stop surface form a limiting fit between the two adjacent tube bodies, preventing axial separation. Furthermore, the limiting protrusion on the second elastic arm and the limiting groove on the first elastic arm engage, thus preventing relative rotation of the two tube bodies during docking. This combination ensures that the two MPP tubes are less likely to separate during docking and restricts relative rotation, resulting in stable and reliable MPP tube docking. The docking process is convenient and efficient, effectively meeting the assembly requirements of MPP tubes and demonstrating strong practicality.
[0020] 2. This utility model utilizes the disengagement groove. When an external force is applied to the second elastic arm, the second elastic arm undergoes elastic deformation, causing the limiting protrusion to disengage from the limiting groove. This allows the two adjacent sets of tube bodies to rotate relative to each other, thereby moving the stop protrusion to the disengagement groove and then moving it from the groove, thus achieving the disengagement of the two adjacent sets of tube bodies. Through this method, the mated MPP tubes can be disassembled easily, saving time and effort, and effectively meeting the assembly requirements of MPP tubes.
[0021] 3. This utility model utilizes the cooperative use of a pushing ring. When the pushing ring moves axially along the main body of the pipe, the guide rod and guide groove guide the second elastic arm to undergo elastic deformation, causing the limiting protrusion to disengage from the limiting groove. In the above method, when the pushing ring moves, it can simultaneously drive several second elastic arms to undergo elastic deformation, thereby improving the convenience of MPP pipe disassembly operations and enhancing its practicality. Attached Figure Description
[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings:
[0023] Figure 1 This is a three-dimensional structural diagram of the overall structure of this utility model;
[0024] Figure 2 for Figure 1 Exploded view;
[0025] Figure 3 for Figure 1 A schematic diagram of the cross-sectional view of the pipe body taken along its axial direction;
[0026] Figure 4 for Figure 1 A schematic diagram of the cross-sectional view of the pipe body cut radially.
[0027] Figure 5 for Figure 4 Enlarged view of point A in the image;
[0028] Figure 6 This is a three-dimensional structural diagram of the head end of the tube body of this utility model;
[0029] Figure 7 This is a three-dimensional structural diagram of the tail end of the tube body of this utility model;
[0030] Figure 8 for Figure 7 Enlarged view of point B in the image;
[0031] Figure 9 This is a cross-sectional view of the main body of the tube of this utility model.
[0032] Figure 10 This is a three-dimensional structural diagram of the driving ring of this utility model;
[0033] The components are: 1. Pipe body; 11. Recessed space; 12. Stop surface; 13. Disengagement groove; 14. Step surface; 2. First elastic arm; 21. Stop protrusion; 211. Inclined surface; 212. Stop mating surface; 22. Limiting groove; 3. Second elastic arm; 31. Limiting protrusion; 32. Protrusion; 33. Guide groove; 4. Pushing ring; 41. Guide rod; 5. Elastic sealing ring. Detailed Implementation
[0034] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0035] like Figure 1-10 The diagram illustrates an MPP pipe docking structure according to this embodiment, comprising a hollow pipe body 1. The pipe body 1 is formed from MPP material and has two ends. The outer diameter of the first end of the pipe body 1 matches the inner diameter of the last end, allowing the first end of one set of pipe bodies 1 to be inserted into the last end of another set. Several sets of pipe bodies 1 are sequentially inserted axially to form a docking configuration. In the specific structural design, a stepped surface 14 is machined on the inner wall of the last end of the pipe body 1. In this docking configuration, the end face of the first end of one of the adjacent sets of pipe bodies 1 abuts against the stepped surface 14 for axial restraint. An elastic sealing ring 5 is arranged between the first end of the pipe body 1 and the stepped surface 14 to improve the sealing performance of the two sets of pipe bodies 1 during docking.
[0036] The tube body 1 has a first elastic arm 2 formed on the side wall of its first end and a second elastic arm 3 formed on the side wall of its tail end. Both the first elastic arm 2 and the second elastic arm 3 extend axially along the tube body 1. When subjected to external force, the first elastic arm 2 and the second elastic arm 3 can spring back between the inner and outer spaces of the tube body 1, allowing the elastic ends of the first elastic arm 2 and the second elastic arm 3 to extend into the interior of the tube body 1 or move outward from the tube body 1. In a specific structural design, notches extending axially from the port position are machined on the side walls of both ends of the tube body 1. The first elastic arm 2 and the second elastic arm 3 are formed in the notches, with the fixed ends of the first elastic arm 2 and the second elastic arm 3 connected to the tube body 1, and the elastic ends of the first elastic arm 2 and the second elastic arm 3 facing the port. According to the actual structural design, the first elastic arm 2 and the second elastic arm 3 can be integrally formed with the tube body 1, or they can be thin sheet structures fixed to the tube body 1 by screws.
[0037] The first elastic arm 2 has a stop protrusion 21 and a limiting groove 22 extending along its length on its outer surface. The end of the limiting groove 22 near the head of the tube body 1 is open. When the first elastic arm 2 undergoes elastic deformation, the limiting groove 22 moves synchronously. The inner surface of the second elastic arm 3 has a limiting protrusion 31 corresponding to the limiting groove 22. In the aforementioned docking state, the limiting protrusion 31 and the limiting groove 22 are axially inserted into each other. Through the above structural design, the limiting protrusion 31 and the limiting groove 22 cooperate with each other to restrict the rotation of two adjacent tube bodies 1 in the docking state.
[0038] A recessed space 11 is machined on the inner sidewall of the tail end of the aforementioned tube body 1. This recessed space 11 has a stop surface 12 facing the head end of the tube body 1, and this stop surface 12 is a stepped plane. In the aforementioned docking state, the stop protrusion 21 extends into the recessed space 11 and forms a limiting fit with the stop surface 12 in the axial direction. Through the above structural design, in the docking state, the stop surface 12 and the stop protrusion 21 mutually limit each other, thereby preventing two adjacent tube bodies 1 from detaching from each other in the axial direction.
[0039] In this embodiment, a release groove 13 is machined on the inner sidewall of the tail end of the tube body 1. This release groove 13 extends from the port position of the tail end and communicates with the recessed space 11. In the docking state, the second elastic arm 3 moves outward from the tube body 1 under external force, reaching a first release position where the limiting protrusion 31 disengages from the limiting groove 22, thereby releasing the circumferential restriction of the two adjacent tube bodies 1. At this first release position, the two adjacent sets of tube bodies 1 rotate relative to each other, reaching a second release position where the stop protrusion 21 corresponds to the release groove 13. At this second release position, by pulling out one set of tube bodies 1, the stop protrusion 21 moves out through the release groove 13, thus achieving the disassembly of the tube body 1.
[0040] In this embodiment, the aforementioned stop protrusion 21 has a stop mating surface 212 facing the tail end of the tube body 1 and an inclined surface 211 facing away from the tail end of the tube body 1. The inclined surface 211 has an inclined lower end near the head end and an inclined upper end away from the head end. The inclined surface 211 serves as a guide, allowing the first elastic arm 2 and the stop protrusion 21 to be smoothly inserted into the tail end of the adjacent tube body 1. During docking, the stop mating surface 212 abuts against the stop surface 12 to provide a limiting function.
[0041] The tube body 1 has several sets of second elastic arms 3 arranged at intervals along the circumferential direction. The MPP tube docking structure of this embodiment includes a pushing ring 4. The pushing ring 4 is sleeved on the tail end of the tube body 1 and moves axially. A protrusion 32 is processed on the outer surface of the second elastic arm 3. The MPP tube docking structure is a hollow tube body 1. The tube body 1 is formed of MPP material and has two ends. The outer diameter of the head end of the tube body 1 is adapted to the inner diameter of the tail end, so that the head end of one set of tube bodies 1 can be inserted into the tail end of another set of tube bodies 1. Several sets of tube bodies 1 are inserted axially to form a docking state. In the specific structural design, a stepped surface 14 is processed on the inner side wall of the tail end of the tube body 1; a guide groove 33 is processed on the side of the protrusion 32. The guide groove 33 is arranged at an angle and has two ends spaced apart in the length direction of the tube body 1, with the first end close to the tube body 1 and the second end away from the tube body 1. The first end of the push ring 4 is close to the tail end of the tube body 1, and the second end is far from the tail end of the tube body 1. A guide rod 41 is machined on the push ring 4 corresponding to each second elastic arm 3. This guide rod 41 is slidably connected to the guide groove 33 in the extending direction of the guide groove 33, and forms a limiting fit with the guide groove 33 in the inner and outer directions of the tube body 1. When the push ring 4 moves from the head end to the tail end of the tube body 1, the guide rod 41 slides within the guide groove 33, pushing the protrusion 32 away from the tube body 1, thereby causing the second elastic arm 3 and the limiting protrusion 31 to move together away from the tube body 1. Through this structural design, when the push ring 4 moves to one side, it can simultaneously drive several second elastic arms 3 to undergo elastic deformation, thereby improving the convenience of MPP tube disassembly operations and enhancing practicality.
[0042] In practical use, the two sets of tube bodies 1 are aligned by aligning the head end of one with the tail end of the other, and simultaneously aligning the limiting protrusion 31 with the limiting groove 22. They are then inserted axially to form a docking state. In this docking state, the stop protrusion 21 on the first elastic arm 2 and the stop surface 12 form a limiting engagement, preventing the two sets of tube bodies 1 from detaching axially. Furthermore, the limiting protrusion 31 on the second elastic arm 3 and the limiting groove 22 on the first elastic arm 2 engage, thereby preventing the two sets of tube bodies 1 from rotating relative to each other during docking. This combination ensures that the two sets of MPP tubes are not easily detached during docking and restricts relative rotation. The MPP tube docking is stable and reliable, and the docking process is convenient and efficient, effectively meeting the assembly requirements of MPP tubes and demonstrating strong practicality.
[0043] When disassembly is required, the ring 4 is pushed to move axially along the tube body 1. Guided by the guide rod 41 and the guide groove 33, each of the second elastic arms 3 undergoes synchronous elastic deformation, causing the limiting protrusion 31 to disengage from the limiting groove 22, thereby allowing the two adjacent sets of tube bodies 1 to rotate relative to each other. Pushing the two sets of tube bodies 1 to rotate relative to each other moves the stop protrusion 21 to the disengagement groove 13. Pulling one set of tube bodies 1 causes the stop protrusion 21 to move out through the disengagement groove 13, thereby achieving the disengagement of the two adjacent sets of tube bodies 1. Through the combination of the above methods, the connected MPP tubes can be disassembled easily, saving time and effort, and effectively meeting the assembly requirements of MPP tubes.
[0044] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. An MPP pipe connection structure, comprising a pipe body; characterized in that: A first elastic arm is formed on the side wall of the first end of the tube body, and a second elastic arm is formed on the side wall of the tail end; both the first elastic arm and the second elastic arm extend along the axial direction of the tube body and spring back between the inner and outer spaces of the tube body. The outer surface of the first elastic arm is provided with a stop protrusion, and the outer surface of the first elastic arm is provided with a limiting groove extending along its length. The inner side of the second elastic arm is provided with a limiting protrusion corresponding to the limiting groove; A recessed space is provided on the inner side wall of the tail end of the tube body; the recessed space has a stop surface facing the head end of the tube body. The two sets of pipe bodies are in a docking state where they are inserted end to end along the axial direction; in the docking state, the limiting protrusion and the limiting groove at the corresponding end are inserted into each other along the axial direction, and the stopping protrusion extends into the recessed space at the corresponding end and forms a limiting fit with the stopping surface in the axial direction.
2. The MPP pipe connection structure according to claim 1, characterized in that: The inner wall of the tail end of the tube body is provided with a detachment groove that extends from the port position of the tail end and communicates with the recessed space. In the docking state, the second elastic arm has a first disengagement position that causes the limiting protrusion to disengage from the limiting groove; and in the first disengagement position, there is a second disengagement position where the two adjacent sets of tube bodies rotate relative to each other and the stop protrusion corresponds to the disengagement groove.
3. The MPP pipe connection structure according to claim 1, characterized in that: The pipe body has notches extending axially from the port position on the side walls at both ends; the first elastic arm and the second elastic arm are formed in the notches, and the elastic ends of the first elastic arm and the second elastic arm are arranged facing the port.
4. The MPP pipe connection structure according to claim 1, characterized in that: The stop protrusion has a stop mating surface arranged facing the tail end of the tube body and an inclined surface arranged away from the tail end of the tube body; the inclined surface has an inclined lower end near the head end and an inclined upper end away from the head end; in the docking state, the stop mating surface mates with the stop surface.
5. The MPP pipe connection structure according to claim 1, characterized in that: The tube body is provided with several sets of second elastic arms spaced apart along the circumferential direction; the MPP tube docking structure includes a pushing ring that is sleeved on the tail end of the tube body and moves axially; the outer side of the second elastic arm is provided with a protrusion; the protrusion is provided with a guide groove; the guide groove is inclined and has two ends spaced apart along the length of the tube body, the first end being close to the tube body and the second end being away from the tube body; the pushing ring is provided with a guide rod corresponding to each second elastic arm; the guide rod is slidably connected to the guide groove in the extension direction of the guide groove and forms a limiting fit with the guide groove in the inner and outer directions of the tube body.
6. The MPP pipe connection structure according to claim 1, characterized in that: A stepped surface is provided on the inner side wall of the tail end of the tube body; in the docking state, the end face of the head end of one of the two adjacent tube bodies abuts and fits against the stepped surface.
7. The MPP pipe connection structure according to claim 1, characterized in that: An elastic sealing ring is provided between the first end of the pipe body and the stepped surface.