MPP polypropylene pipe convenient to connect
By setting diamond-shaped limiting parts and limiting hole structures at the connection points of power pipes, the problem of connecting power pipes is solved, achieving stable and simple connection operations and avoiding rotation and tool use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU DINGXIN JIANKE IND CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-15
AI Technical Summary
In existing technologies, it is difficult to rotate the power pipe body during connection, resulting in connection difficulties and requiring the use of external tools or rotation of the pipe body, which is inconvenient to operate.
A diamond-shaped limiting component and a limiting hole structure are set at the connection part of the tube body. The tube body is stably connected by the extrusion and locking of the diamond-shaped limiting component, avoiding rotation and the use of external tools.
It achieves stability and simplicity in pipe connection, is easy to operate, and can be clamped without rotation or tools, thus improving the practicality of the connection.
Smart Images
Figure CN224249297U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of power pipe technology, specifically relating to an MPP polypropylene pipe that is easy to connect. Background Technology
[0002] Electrical conduits are products made of PE (modified polyethylene) or modified polypropylene (MPP) through hot-dip plastic coating or epoxy resin coating for both internal and external application. They possess excellent corrosion resistance, impact resistance, and heat resistance. Simultaneously, the coating itself has good electrical insulation properties, preventing electrolytic corrosion. Furthermore, they have low water absorption, high mechanical strength, and a low coefficient of friction, enabling long-term use.
[0003] Chinese patent publication number CN219513731 U, entitled "An Easy-to-Install Electrical Conduit," comprises several interconnected pipe bodies and connectors. The connectors are located at the joints of the pipe bodies. Each pipe body includes a pipe shaft, a first connecting end, and a second connecting end, which are interlocked during assembly. While this patent eliminates the need for wrenches or other connecting tools when connecting the pipe bodies, its method of interlocking the first and second connecting ends and then rotating them to complete the assembly is flawed. In practice, however, pipes are typically long, making them easier to drag than rotate, and rotation is often impossible for a single worker. Further improvements are necessary. Utility Model Content
[0004] The purpose of this invention is to provide an MPP polypropylene pipe that is easy to connect, in order to solve the problem in the prior art that it is difficult to rotate the pipe body during the connection process. When connecting the pipe bodies, this invention does not require the use of external tools such as wrenches or hot melt machines, nor does it require rotating the pipe body to lock it in place. It is simple to operate and highly practical.
[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:
[0006] An MPP polypropylene pipe that is easy to connect includes a pipe body and a first connecting portion and a second connecting portion disposed at both ends of the pipe body. The first connecting portion of one pipe body is connected to the second connecting portion of the next pipe body. The outer wall of the first connecting portion has a limiting groove arranged in a circumferential array. A rhomboid limiting member is placed in the limiting groove. Each connection point of the rhomboid limiting member is provided with a pop-out limiting point. The outer wall of the second connecting portion has at least two sets of limiting holes arranged in a circumferential array. When the pipe bodies are connected, the rhomboid limiting member is squeezed and unfolded, so that at least two of the pop-out limiting points of the rhomboid limiting member are locked in the corresponding limiting holes.
[0007] In this application, when connecting several tubes, the inner bottom wall of the second connecting part gradually approaches and presses against the outer end of the rhomboid limiting member. The rhomboid limiting member is located between the first connecting part and the second connecting part and is situated in the limiting groove. When the first connecting part and the second connecting part are connected, the rhomboid limiting member unfolds, with each side fitting against the edge of the limiting groove. Furthermore, the rhomboid limiting member deforms into an arc shape to fit against the inner circumferential wall of the second connecting part. The pop-out limiting point is positioned in the limiting hole and pops out and locks into the corresponding limiting hole. Under normal circumstances, all three pop-out limiting points can be locked into the corresponding limiting holes. Of course, having two pop-out limiting points locked into the corresponding limiting holes can achieve the fixation of the connection and ensure the stability of the connection.
[0008] Furthermore, the number of limiting grooves is set to three, and the planar projection of the limiting grooves is rhomboid. Correspondingly, three rhomboid limiting components are configured. This arrangement achieves stable and fixed connection without wasting structure or increasing cost, and offers strong adaptability.
[0009] Furthermore, the limiting groove extends completely through the tube body along its length to form a through groove on the side near the end of the tube body, and the width of the through groove is between 4 and 7 times the diameter of the limiting hole.
[0010] Furthermore, the rhomboid limiting member includes limiting strips connected in a rhomboid or square shape, and the pop-out limiting point is installed at at least two joints of adjacent limiting strips.
[0011] Furthermore, the inner wall of the second connecting part of the tube body is configured as an inner circumferential wall with an inner diameter larger than the diameter of the tube body, and the inner circumferential wall fits against the outer wall of the second connecting part when the tube body is connected.
[0012] Furthermore, each set of limiting holes includes a first limiting hole, a second limiting hole, and a third limiting hole, the opening positions of the first limiting hole, the second limiting hole, and the third limiting hole correspond to the three corners of the rhombus of the rhombus limiting member.
[0013] The utility model adopting the above technical solution has the following advantages:
[0014] In this application, a rhomboid limiting component is placed in the limiting groove, and the number can be set as needed. Each connection of the rhomboid limiting component is provided with a pop-out limiting point. The outer wall of the second connecting part has at least two sets of limiting holes arranged in a circumferential array. When the tubes are connected, the rhomboid limiting component is compressed and unfolded, so that at least two of the pop-out limiting points of the rhomboid limiting component are locked in the corresponding limiting holes. When connecting the tubes, there is no need to use external tools such as wrenches or hot melt machines, nor is it necessary to rotate the tubes to ensure a tight fit during docking. The operation is simple and highly practical. Attached Figure Description
[0015] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;
[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the MPP polypropylene pipe that is easy to connect according to this utility model. Figure 1 ;
[0017] Figure 2 This is a schematic diagram of the structure of an embodiment of the MPP polypropylene pipe that is easy to connect according to this utility model. Figure 2 ;
[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0019] Figure 4 This is a cross-sectional structural diagram of an embodiment of an MPP polypropylene pipe that is easy to connect according to this utility model;
[0020] Figure 5 This is a schematic diagram of the assembly of the two tubes after they are connected in an embodiment of this utility model;
[0021] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the BB direction;
[0022] Figure 7 This is a schematic diagram of the exploded structure of the two tubes connected in an embodiment of this utility model;
[0023] Figure 8 This is a schematic diagram showing the state of the rhomboid limiting member after connection in an embodiment of this utility model;
[0024] Figure 9 This is a schematic diagram of the structure of the rhomboid limiting member in the embodiment of this utility model. Figure 1 ;
[0025] Figure 10 This is a schematic diagram of the structure of the limiting strip in an embodiment of the present utility model;
[0026] Figure 11 This is a schematic diagram of the structure of the rhomboid limiting member in the embodiment of this utility model. Figure 2 ;
[0027] The symbols for the main components are explained below:
[0028] 100. Tube body; 101. First connecting part; 102. Second connecting part; 103. Connecting limiting hole group; 1031. First limiting hole; 1032. Second limiting hole; 1033. Third limiting hole; 104. Limiting groove; 1041. Abutting arc wall; 105. Through groove; 106. First end wall; 107. Second end wall; 108. Third end wall; 109. Inner peripheral wall; 110. Rhomboid limiting element; 111. Pop-out limiting point; 112. Connecting hole; 113. Limiting strip; 114. Bidirectional pop-out protrusion. Detailed Implementation
[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.
[0030] like Figures 1 to 7As shown in the figure, an MPP polypropylene pipe for easy connection according to an embodiment of the present invention includes a pipe body 100 and a first connecting portion 101 and a second connecting portion 102 disposed at both ends of the pipe body 100. The first connecting portion 101 of one pipe body 100 is connected to the second connecting portion 102 of the next pipe body 100, and several pipe bodies 100 are connected sequentially. The first connecting portion 101 is an inner interface processed at one end of the pipe body 100, having a first end wall 106 and a second end wall 107. The second connecting portion 102 is an outer sleeve processed at the other end of the pipe body 100, having a third end wall 108 and an inner peripheral wall 109. During connection, the first end wall 106 abuts against the third end wall 108, the second end wall 107 abuts against the end of the outer sleeve, and the outer wall surface of the inner interface fits against the inner peripheral wall 109. The first connecting portion 101... The outer wall has three limiting grooves 104 arranged in a circular array, and the planar projection of the limiting grooves 104 is rhomboid. A rhomboid limiting member 110 is placed in the limiting groove 104, and each connection of the rhomboid limiting member 110 is provided with a pop-out limiting point 111. The outer wall of the second connecting part 102 has three sets of limiting holes arranged in a circular array, forming a connecting limiting hole group 103. Each set of limiting holes includes three limiting holes, namely a first limiting hole 1031, a second limiting hole 1032, and a third limiting hole 1033. When the tube body 100 is connected, the rhomboid limiting member 110 is squeezed and unfolded, so that at least two pop-out limiting points 111 of the rhomboid limiting member 110 are locked in the corresponding limiting holes, that is, locked in the first limiting hole 1031, the second limiting hole 1032, and the third limiting hole 1033. In this embodiment, when connecting the pipe body 100, the rhomboid limiting member 110 can be placed into the limiting groove 104 during connection. Then, the first connecting part 101 and the second connecting part 102 are connected. During connection, the inner bottom wall of the second connecting part 102 gradually approaches and presses against the outer end of the rhomboid limiting member 110. The rhomboid limiting member 110 is located between the first connecting part 101 and the second connecting part 102, and within the limiting groove 104. When the first connecting part 101 and the second connecting part 102 are fully connected, the rhomboid limiting member 110 unfolds, with each side fitting against the groove edge of the limiting groove 104. Furthermore, the rhomboid limiting member 110 deforms into an arc shape (e.g., ...). Figure 8 (As shown) It fits against the inner peripheral wall 109 of the second connecting part 102; the pop-out limiting point 111 is in place with the limiting hole and pops out and is locked in the corresponding limiting hole, namely the first limiting hole 1031, the second limiting hole 1032 and the third limiting hole 1033; during the connection process of the first connecting part 101 and the second connecting part 102, before the pop-out limiting point 111 is in place with the limiting hole, the pop-out limiting point 111 is compressed by the inner peripheral wall 109 and does not pop out; at this time, the shape of the rhomboid limiting member 110 is relatively long and narrow. When the pop-out limiting point 111 is in place with the limiting hole, it pops out and is locked in the limiting hole, at this time the shape of the rhomboid limiting member 110 is relatively square.
[0031] In fact, in this embodiment, the limiting groove 104 is formed by completely penetrating the tube body 100 along the length of the tube body 100 on one side near the end of the tube body 100 to form a through groove 105. The other three ends of the limiting groove 104 are set as abutting arc walls 1041, which are the same size as the pop-out limiting points 111. During the connection process of the first connecting part 101 and the second connecting part 102, a part of the rhomboid limiting member 110 is in the through groove 105. The end of the rhomboid limiting member 110 near the third end wall 108 of the second connecting part 102 is pressed by the third end wall 108. As the connection proceeds, the rhomboid limiting member 110 gradually unfolds, and the three pop-out limiting points 111 unfold and deform to the abutting arc wall 1041 of the limiting groove 104, and at the same time correspond to the limiting hole of the second connecting part 102.
[0032] For example, the number of limiting grooves 104 can also be set to two as needed, the corresponding connecting limiting hole group 103 is set to two groups, and the rhomboid limiting member 110 is configured to be two.
[0033] For example, the width of the through groove 105 is 4 times, 5 times, or 7 times the diameter of the limiting hole, and can be flexibly selected according to the size specifications of the rhomboid limiting member 110.
[0034] In this embodiment, the shape of the rhomboid limiting member 110 is an improved rhomboid with a curved surface at one end. Thus, during the unfolding process of the rhomboid limiting member 110, it does not need to be deformed to adapt to the shape of the limiting groove 104. After the rhomboid limiting member 110 is unfolded, each pop-out limiting point 111 reaches the corresponding abutting arc wall 1041 and is limited, and is locked in the corresponding limiting hole, thus completing the fixation after the first connecting part 101 and the second connecting part 102 are connected.
[0035] It should be noted that, under normal circumstances, all three pop-out limit points 111 can be locked in the corresponding limit holes. Of course, if two pop-out limit points 111 are locked in the corresponding limit holes, the connection can be fixed and the stability of the connection can be guaranteed.
[0036] As described above, there is no pop-out limiting point 111 at the end of the rhomboid limiting member near the through groove 105. Correspondingly, on the second connecting part 102, each group of connecting limiting holes 103 is provided with three limiting holes: a first limiting hole 1031, a second limiting hole 1032, and a third limiting hole 1033. The opening positions of the first limiting hole 1031, the second limiting hole 1032, and the third limiting hole 1033 correspond to the three corners of the rhombus of the rhombus limiting member 110. In this embodiment, the limiting groove 104 of the first connecting part 101 is uniformly arranged in a 102° circumference, and three rhomboid limiting members 110 are correspondingly configured. This arrangement can achieve stable fixing of the connection without wasting structure or increasing cost, and has strong adaptability.
[0037] like Figure 9 , Figure 10 As shown, in this embodiment, the rhomboid limiting member 110 includes limiting strips 113 connected in a rhomboid shape, and pop-out limiting points 111 are installed at the connection points of three adjacent limiting strips 113.
[0038] For example, a connecting hole 112 is provided at one end of the limiting strip 113, and a pop-out limiting point 111 is installed at the other end of the limiting strip 113. The pop-out limiting point 111 is configured such that: a mounting hole is provided at the other end of the limiting strip 113, a spring sleeve is installed in the mounting hole, a spring is fixed in the spring sleeve, and a limiting post is inserted into the spring sleeve, with the bottom end of the limiting post fixedly connected to the spring. After the spring sleeve is connected to the connecting hole 112, the limiting post can extend partially out of the opening of the connecting hole 112 under the support of the spring, so as to lock into the limiting hole.
[0039] In fact, such as Figure 11 As shown, a connecting hole 112 is provided at one end of the limiting strip 113, and a bidirectional pop-out protrusion 114 is installed at the other end of the limiting strip 113. The bidirectional pop-out protrusion 114 is similar in structure to the pop-out limiting point 111, except that the spring is fixed in the middle of the inner hole of the spring sleeve, and limiting posts are connected above and below the spring. Adaptively, a limiting hole of a certain depth is also machined in the abutting arc wall 1041 of the limiting groove 104 to accommodate the bidirectional pop-out protrusion 114.
[0040] For example, the limiting strip 113 can be an irregularly shaped strip with misaligned notches at both ends, or a regular strip-shaped limiting strip 113, depending on the actual situation. Furthermore, whether it is an irregularly shaped strip or a regular limiting strip 113, it can be optionally set with a pop-out limiting point 111 or a bidirectional pop-out protrusion 114.
[0041] For example, the limiting hole opened in the second connecting part 102 is a non-penetrating countersunk hole, so that the sealing performance of the tube body 100 can be guaranteed while providing the locking function.
[0042] In this embodiment, the inner wall of the tube body 100 at the second connecting part 102 is set as an inner peripheral wall 109 with an inner diameter larger than the diameter of the tube body 100. When connecting the tube body 100, the inner peripheral wall 109 fits against the outer wall of the second connecting part 102.
[0043] This embodiment provides an MPP polypropylene pipe that is easy to connect. The pipe body 100 has a first connecting portion 101 and a second connecting portion 102 at both ends. A rhomboid limiting groove 104 is formed on the outer wall of the first connecting portion 101. During connection, a rhomboid limiting member 110 is placed in the limiting groove 104. The number of rhomboid limiting members 110 can be set as needed. Each connection point of the rhomboid limiting member 110 has a pre-set pop-out limiting point 111. The outer wall of the second connecting portion 102 has at least two sets of limiting holes arranged in a circumferential array. When the pipe bodies 100 are connected, the rhomboid limiting members 110 are compressed and unfolded, causing at least two pop-out limiting points 111 of the rhomboid limiting members 110 to lock into the corresponding limiting holes. When connecting the pipe bodies, no external tools such as wrenches or hot melt machines are needed, and the pipe body 100 does not need to be rotated to achieve a tight connection. The operation is simple, the application scenarios are wide, and the practicality is high.
[0044] The above provides a detailed description of an MPP polypropylene pipe that is easy to connect, as provided by this utility model. The specific embodiments are described only to help understand the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. An MPP polypropylene pipe that is easy to connect, comprising a pipe body and a first connecting portion and a second connecting portion disposed at both ends of the pipe body, wherein the first connecting portion of one pipe body is connected to the second connecting portion of the next pipe body; characterized in that, The outer wall of the first connecting part is provided with a circumferential array of limiting grooves, and a rhombus-shaped limiting member is placed in the limiting groove. Each connection of the rhombus-shaped limiting member is provided with a pop-out limiting point. The outer wall of the second connecting part is provided with at least two sets of limiting holes in a circumferential array. When the tube is connected, the rhombus-shaped limiting member is squeezed and unfolded, so that at least two of the pop-out limiting points of the rhombus-shaped limiting member are locked in the corresponding limiting holes.
2. The MPP polypropylene pipe for easy connection according to claim 1, characterized in that, The number of limiting grooves is three, and the planar projection of the limiting grooves is rhomboid.
3. The easily connectable MPP polypropylene pipe according to claim 1 or 2, characterized in that, The limiting groove extends completely through the tube body along its length on one side near the end of the tube body to form a through groove, the width of which is between 4 and 7 times the diameter of the limiting hole.
4. The MPP polypropylene pipe for easy connection according to claim 1, characterized in that, The rhomboid limiting member includes limiting strips connected in a rhomboid shape, and the pop-out limiting point is installed at at least two joints of adjacent limiting strips.
5. The MPP polypropylene pipe for easy connection according to claim 1, characterized in that, The inner wall of the tube body at the second connecting part is configured with an inner diameter larger than the diameter of the tube body, and the inner circumferential wall fits against the outer wall of the second connecting part when the tube body is connected.
6. The MPP polypropylene pipe for easy connection according to claim 1, characterized in that, Each set of limiting holes includes a first limiting hole, a second limiting hole, and a third limiting hole, the opening positions of the first limiting hole, the second limiting hole, and the third limiting hole correspond to the three corners of the rhombus of the rhombus limiting member.