Flame-retardant PE pipe convenient to assemble and connect

Abstract

The utility model discloses a flame-retardant PE pipe convenient to assemble and connect, a square guide groove is formed in a mounting lug, a wedging clamping block is embedded and wedged in the inner side of the square guide groove, a guide rod is fixedly connected to the middle end of the edge of the wedging clamping block, a limiting spring is sleeved on the outer side of the guide rod, and the limiting spring is sleeved on the inner side of the square guide groove. According to the PE pipe assembling and connecting device, the end of a PE pipe can be conveniently and rapidly assembled and connected preliminarily, the trouble of assembling and connecting the PE pipe is reduced, meanwhile, by means of the installation protruding blocks, the square guide grooves, the wedging clamping blocks, the guide rods and the limiting springs, the assembling and connecting efficiency of the PE pipe is improved, and the assembling and connecting efficiency of the PE pipe is improved. The fitting clamping block can be conveniently and tightly embedded into the fitting clamping groove through an elastic limiting means, so that the position between the second connecting pipe head and the assembling pipe head is clamped and limited, it is guaranteed that the PE pipe has higher connection stability after actual assembling, and stable connection and use of the PE pipe are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of PE pipes, in particular to a flame-retardant PE pipe that is easy to assemble and connect. Background Art

[0002] PE pipe refers to polyethylene pipe, which is made of polyvinyl chloride resin, stabilizers, lubricants, etc. and then extruded by hot pressing. It is the earliest plastic pipe material developed and applied and is a commonly used pipe material. Due to its comprehensive advantages such as safety, hygiene, easy construction and long service life, PE pipe is widely used in building water supply and drainage, buried drainage pipes, building heating, gas pipelines, electrical and telecommunications protective casings, industrial pipes, agricultural pipes and other fields;

[0003] Currently, PE pipes are generally connected through threaded connections during use. However, this method is very troublesome to operate and cannot guarantee the stability of the PE pipe after connection. At the same time, after long-term use, the connection of the PE pipe is easily infiltrated by fine impurities, making it impossible to disassemble normally, affecting the actual use effect. Utility Model Content

[0004] The utility model provides a flame-retardant PE pipe that is easy to assemble and connect, which can effectively solve the problem raised in the above background technology that the current PE pipe is generally connected by a threaded connection during use, but this method is very troublesome to operate during connection and cannot guarantee the stability of the PE pipe after connection. At the same time, after long-term use, the connection of the PE pipe is easily infiltrated by fine impurities, resulting in the inability to perform normal disassembly during the process, affecting the actual use effect.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a flame-retardant PE pipe that is easy to assemble and connect, comprising an outer pipe and an inner pipe, an inner pipe being provided on the inner side of the outer pipe, and an intermediate protective pipe being provided between the outer pipe and the inner pipe, a first connecting pipe head being connected to one end of the outer pipe and the inner pipe, a second connecting pipe head being connected to the other end of the outer pipe and the inner pipe corresponding to the first connecting pipe head, a connecting end ring being fixedly connected to the opposite end of the first connecting pipe head and the second connecting pipe head, a docking groove being provided inside the second connecting pipe head, and an assembly pipe head being connected to the end of the first connecting pipe head corresponding to the docking groove;

[0006] The outer edge of the second connecting pipe head is fixedly connected with a mounting protrusion at an equal angle, and a square guide groove is provided inside the mounting protrusion, and a fitting block is embedded in the inner side of the square guide groove and fits in the connection, and a guide rod is fixedly connected to the middle end of the edge of the fitting block, and a limit spring is sleeved on the outer side of the guide rod. A fitting groove is provided at the edge of the assembly pipe head corresponding to the fitting block, and a limiting hole is equidistantly provided on one side edge of the guide rod, and the inner side of the limiting hole is fit-connected with a limiting pin;

[0007] An extrusion sealing groove is provided at the contact position between the inner side end of the second connecting pipe head and the end of the assembly pipe head, and a sealing protrusion is bonded to the end of the assembly pipe head corresponding to the extrusion sealing groove.

[0008] Preferably, an oblique groove is provided on the edge of the engaging block, and the cross-sectional diameter of the engaging block is equal to the inner diameter of the engaging groove.

[0009] Preferably, the guide rod slides along the inside of the mounting protrusion, and two limiting holes are provided on the edge of the guide rod, and the vertical spacing between the two limiting holes is equal to the depth of the fitting slot.

[0010] Preferably, after the assembly pipe head is completely embedded in the inner side of the docking groove, the sealing protrusion at the end of the assembly pipe head is tightly embedded in the extrusion sealing groove.

[0011] Preferably, the inner side of the intermediate protective tube is provided with several groups of built-in arc-shaped cavities at equal angles along the circumferential direction, the inner side of the built-in arc-shaped cavities is embedded with three groups of inner support rods, and the side ends of the intermediate protective tube are evenly bonded with elastic protective edge strips at equal angles.

[0012] Preferably, a filling chamber is provided inside the built-in arc-shaped cavity, and the filling chamber is filled with carbon dioxide gas, and the inner support rod is an elastic metal thin rod.

[0013] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0014] 1. By arranging the first connecting pipe head, the second connecting pipe head and the connecting end ring at the end of the PE pipe, combined with the assembly pipe head and the docking groove arranged at the ends of the first connecting pipe head and the second connecting pipe head, it is convenient to perform preliminary quick assembly and connection of the ends of the PE pipe, reducing the trouble during the assembly and connection of the PE pipe. At the same time, by utilizing the installation protrusion, the square guide groove, the fitting block, the guide rod and the limit spring, it is convenient to use the elastic limiting means to make the fitting block tightly embedded in the fitting groove, thereby clamping and limiting the position between the second connecting pipe head and the assembly pipe head, thereby ensuring that the PE pipe has higher connection stability after actual assembly, and ensuring the stable connection and use of the PE pipe;

[0015] The limit hole and the limit pin are used to conveniently limit the position of the guide rod and the fitting block at its bottom. Therefore, when the PE pipe is disassembled, it is only necessary to pull the guide rod to make the fitting block exit the fitting slot, and the PE pipe can be easily disassembled, thereby improving the convenience of disassembling the PE pipe.

[0016] 2. By respectively arranging an extrusion sealing groove and a sealing protrusion on the end faces of the second connecting pipe head and the assembly pipe head on the opposite side, when the first connecting pipe head is assembled and connected between the second connecting pipe head, the sealing protrusion is inserted into the extrusion sealing groove, thereby effectively sealing the connection between them, thereby ensuring the sealing of the joint at the PE pipe connection and enabling it to be better transported and used.

[0017] 3. By arranging the built-in arc cavity, the inner support rod and the elastic protective edge strip on the inner side of the intermediate protective tube, when the PE tube is in a state of flame burning, the carbon dioxide gas filled in the built-in arc cavity can be used to isolate the fire source and extinguish the fire, thereby effectively improving the flame retardant ability of the PE tube, preventing the flame from directly burning through the intermediate protective tube and affecting the normal transportation of the inner tube. In addition, the actual supporting capacity of the intermediate protective tube is improved based on the inner support rod and the elastic protective edge strip, so that the intermediate protective tube can effectively support the entire PE tube and have a higher deformation resistance, thereby avoiding the bending of the PE tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0019] In the attached figure:

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 This is a structural diagram of the assembly pipe head of the utility model;

[0023] Figure 4 This is a schematic structural diagram of the inner support rod of the utility model;

[0024] Numbers in the figure: 1. Outer tube; 2. Inner tube; 3. Intermediate protective tube; 4. First connecting tube head; 5. Second connecting tube head; 6. Connecting end ring; 7. Mounting protrusion; 8. Square guide groove; 9. Fitting block; 10. Guide rod; 11. Limit spring; 12. Docking groove; 13. Assembly tube head; 14. Fitting groove; 15. Limit hole; 16. Limit pin; 17. Extrusion sealing groove; 18. Sealing protrusion; 19. Built-in arc cavity; 20. Inner support rod; 21. Elastic protective edge strip. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0026] Example: Figure 1-4 As shown, the utility model provides a technical solution, a flame-retardant PE pipe that is easy to assemble and connect, comprising an outer pipe 1 and an inner pipe 2, the inner pipe 2 is provided on the inner side of the outer pipe 1, and an intermediate protective pipe 3 is provided between the outer pipe 1 and the inner pipe 2, one end of the outer pipe 1 and the inner pipe 2 is connected with a first connecting pipe head 4, the other end of the outer pipe 1 and the inner pipe 2 is connected with a second connecting pipe head 5 corresponding to the first connecting pipe head 4, the first connecting pipe head 4 and the second connecting pipe head 5 are fixedly connected to the opposite ends of the first connecting pipe head 4 and the second connecting pipe head 5 with a connecting end ring 6, a docking groove 12 is opened inside the second connecting pipe head 5, and an assembly pipe head 13 is connected to the end of the first connecting pipe head 4 corresponding to the docking groove 12;

[0027] The outer side end of the second connecting pipe head 5 is fixedly connected with a mounting protrusion 7 at an equal angle, and a square guide groove 8 is provided inside the mounting protrusion 7. The inner side of the square guide groove 8 is embedded with a fitting block 9, and the middle end of the edge of the fitting block 9 is fixedly connected with a guide rod 10. The outer side of the guide rod 10 is sleeved with a limit spring 11. The edge end of the assembly pipe head 13 corresponds to the fitting block 9 and is provided with a fitting groove 14. The edge of the fitting block 9 is provided with an oblique groove. The cross-sectional diameter of the fitting block 9 is equal to the inner diameter of the fitting groove 14, so that when the assembly pipe head 13 moves along the inside of the docking groove 12, the fitting block 9 can be quickly moved based on the elastic force of the limit spring 11. The guide rod 10 is provided with two limiting holes 15 on the edge of the guide rod 10, and the spacing between the two limiting holes 15 in the vertical direction is equal to the depth of the fitting slot 14, which makes it convenient to drive the fitting block 9 to slide through the guide rod 10. At the same time, the position of the fitting block 9 is conveniently limited by the cooperation of the limiting hole 15 and the limiting pin 16, which facilitates the connection and disassembly of the PE pipe.

[0028] An extrusion sealing groove 17 is provided at the contact position between the inner edge of the second connecting pipe head 5 and the end of the assembly pipe head 13, and a sealing protrusion 18 is bonded to the end of the assembly pipe head 13 corresponding to the extrusion sealing groove 17. After the assembly pipe head 13 is completely embedded in the inner side of the docking groove 12, the sealing protrusion 18 at the end of the assembly pipe head 13 is tightly embedded in the extrusion sealing groove 17. By snapping the sealing protrusion 18 into the extrusion sealing groove 17, the connection between them is effectively sealed, thereby ensuring the sealing of the joint at the PE pipe connection.

[0029] The inner side of the intermediate protective tube 3 is provided with several groups of built-in arc-shaped cavities 19 at equal angles along the circumferential direction. Three groups of inner support rods 20 are embedded and connected to the inner side of the built-in arc-shaped cavity 19. A filling chamber is provided inside the built-in arc-shaped cavity 19, and the filling chamber is filled with carbon dioxide gas. The inner support rod 20 is an elastic metal thin rod. The carbon dioxide gas filled inside the built-in arc-shaped cavity 19 is used to isolate the fire source and extinguish the fire, thereby effectively improving the flame retardant ability of the PE pipe and making the PE pipe have higher deformation resistance. The edge ends of the intermediate protective tube 3 are evenly bonded with elastic protective edge strips 21 at equal angles.

[0030] The working principle and usage process of the utility model are as follows: during the actual connection process of the flame-retardant PE pipe that is easy to assemble and connect, an intermediate protective pipe 3 is first arranged between the outer pipe 1 and the inner pipe 2, and the built-in arc-shaped cavity 19 inside the intermediate protective pipe 3 is filled with carbon dioxide gas. In this way, when the PE pipe is in a state of flame burning, the carbon dioxide gas filled in the built-in arc-shaped cavity 19 can be used to isolate the fire source and extinguish the fire, thereby effectively improving the flame retardancy of the PE pipe and preventing the flame from directly burning through the intermediate protective pipe 3 and affecting the normal transportation of the inner pipe 2;

[0031] The inner support rod 20 inside the built-in arc-shaped cavity 19 and the elastic protective edge strip 21 on the edge of the intermediate protective tube 3 improve the actual supporting capacity of the intermediate protective tube 3 as a whole, so that the intermediate protective tube 3 can effectively support the PE tube as a whole, making it have a higher deformation resistance and preventing the PE tube from bending.

[0032] When two PE pipes need to be connected for use, the assembly pipe head 13 and the docking groove 12 provided at the ends of the first connecting pipe head 4 and the second connecting pipe head 5 are first used to facilitate the preliminary quick assembly and connection of the ends of the PE pipes, thereby reducing the trouble of assembling and connecting the PE pipes. At the same time, the mounting protrusion 7, the square guide groove 8, the fitting block 9, the guide rod 10 and the limit spring 11 are used to facilitate the elastic limiting means to make the fitting block 9 tightly embedded in the fitting groove 14, thereby clamping and limiting the position between the second connecting pipe head 5 and the assembly pipe head 13, thereby ensuring that the PE pipe has higher connection stability after actual assembly;

[0033] During the connection process between the first connecting pipe head 4 and the second connecting pipe head 5, an extrusion sealing groove 17 and a sealing protrusion 18 are respectively provided on the end faces of the second connecting pipe head 5 and the assembly pipe head 13 on opposite sides, so that when the first connecting pipe head 4 is assembled and connected with the second connecting pipe head 5, the sealing protrusion 18 is snapped into the extrusion sealing groove 17, thereby effectively sealing the connection between them, thereby ensuring the sealing of the joint at the PE pipe connection, so that it can be better transported and used;

[0034] In addition, when the PE pipe needs to be disassembled, the limiting hole 15 and the limiting pin 16 are used to conveniently limit the position of the guide rod 10 and the engaging block 9 at its bottom. Therefore, when the PE pipe is disassembled, it is only necessary to pull the guide rod 10 to make the engaging block 9 withdraw from the engaging slot 14, so that the PE pipe can be conveniently disassembled, thereby improving the convenience of disassembling the PE pipe.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A flame-retardant PE pipe that is easy to assemble and connect, comprising an outer pipe (1) and an inner pipe (2), characterized in that: An inner tube (2) is provided on the inner side of the outer tube (1), and an intermediate protective tube (3) is provided between the outer tube (1) and the inner tube (2). One end of each of the outer tube (1) and the inner tube (2) is connected to a first connecting tube head (4). The other end of each of the outer tube (1) and the inner tube (2) is connected to a second connecting tube head (5) corresponding to the first connecting tube head (4). The first connecting tube head (4) and the second connecting tube head (5) are both fixedly connected to a connecting end ring (6) at their opposite ends. A docking groove (12) is provided inside the second connecting tube head (5), and an assembly tube head (13) is connected to the end of the first connecting tube head (4) corresponding to the docking groove (12). The outer side of the second connecting pipe head (5) is fixedly connected with a mounting protrusion (7) at an equal angle, a square guide groove (8) is provided inside the mounting protrusion (7), a fitting block (9) is embedded in the inner side of the square guide groove (8), a guide rod (10) is fixedly connected to the middle end of the side of the fitting block (9), a limiting spring (11) is sleeved on the outer side of the guide rod (10), a fitting groove (14) is provided at the side end of the assembly pipe head (13) corresponding to the fitting block (9), a limiting hole (15) is provided at equal distances on one side of the guide rod (10), and a limiting pin (16) is fitted and connected to the inner side of the limiting hole (15); An extrusion sealing groove (17) is provided at the contact position between the inner side end of the second connecting pipe head (5) and the end of the assembly pipe head (13), and a sealing protrusion (18) is bonded to the end of the assembly pipe head (13) corresponding to the extrusion sealing groove (17).

2. The flame-retardant PE pipe that is easy to assemble and connect according to claim 1, characterized in that: An oblique groove is provided on the edge of the fitting block (9), and the cross-sectional diameter of the fitting block (9) is equal to the inner diameter of the fitting groove (14).

3. The flame-retardant PE pipe that is easy to assemble and connect according to claim 1, characterized in that: The guide rod (10) is guided and slid along the inside of the mounting protrusion (7). Two limiting holes (15) are provided on the edge of the guide rod (10), and the vertical spacing between the two limiting holes (15) is equal to the depth of the fitting slot (14).

4. The flame-retardant PE pipe that is easy to assemble and connect according to claim 1, characterized in that: After the assembly pipe head (13) is completely embedded in the inner side of the docking groove (12), the sealing protrusion (18) at the end of the assembly pipe head (13) is tightly embedded in the extrusion sealing groove (17).

5. The flame-retardant PE pipe that is easy to assemble and connect according to claim 1, characterized in that: The inner side of the intermediate protection tube (3) is provided with a plurality of groups of built-in arc-shaped cavities (19) at equal angles along the circumferential direction, the inner sides of the built-in arc-shaped cavities (19) are embedded and connected with three groups of inner support rods (20), and the side ends of the intermediate protection tube (3) are evenly bonded with elastic protection edge strips (21) at equal angles.

6. The flame-retardant PE pipe that is easy to assemble and connect according to claim 5, characterized in that: A filling chamber is provided inside the built-in arc-shaped cavity (19), and the filling chamber is filled with carbon dioxide gas. The inner support rod (20) is an elastic metal thin rod.

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