High-density polyethylene (HDPE) three-layer-wall composite reinforced pipe

Abstract

The invention belongs to the technical field of composite pipes, and discloses an HDPE three-layer-wall composite reinforced pipe which comprises a composite reinforced pipe body and further comprises a shell, a first rotating assembly, a sealing assembly and a second rotating assembly. Through cooperation of a shell, a first rotating assembly, a reinforcing assembly and other structures, additional supporting and protection are improved for the pipe opening welding position of a composite reinforced pipe body, then the risk of weld joint cracking is reduced, a second protruding block slides into a first inclined groove, a first protruding block slides into a second vertical groove, and when a first rotating cylinder rotates, the first rotating cylinder rotates, and therefore the first rotating cylinder rotates; under the condition that the second vertical groove circumferentially limits the metal baffle, the second protruding block can only drive the metal baffle to move towards the interior of the shell along the track of the first inclined groove, the metal baffle is located at the welding position of the pipe opening of the composite reinforced pipe body after moving, and therefore additional physical protection is provided for the welding position; and hard objects are prevented from directly impacting the welding position, so that the risk of welding seam cracking is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of composite pipes, in particular to a HDPE three-layer wall composite reinforced pipe. Background Art

[0002] HDPE three-layer wall composite reinforced pipe refers to a high-density polyethylene (HDPE) pipe composed of three layers of different materials or structures. This pipe design is intended to improve its mechanical properties, corrosion resistance and service life.

[0003] When the existing composite reinforced pipe is in use, the HDPE three-layer wall composite reinforced pipe and the elbow connector are generally directly connected together by welding, thereby providing convenience for the prefabrication and installation of the entire system, and the welding section is small and does not affect the internal cross-section of the pipeline. However, the welding point of the two pipes is often the weakest point in the pipeline structure, and because the HDPE three-layer wall composite reinforced pipe may be buried underground for a long time, some external factors may cause direct impact and damage to the weld joint of the pipeline, thereby causing wear or cracking of the weld joint, thereby reducing the service life of the pipeline and affecting the normal operation of the project. Therefore, an HDPE three-layer wall composite reinforced pipe is proposed to solve the problems raised in the background technology. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a HDPE three-layer wall composite reinforced pipe, which has the advantage of conveniently providing additional support for the weld of the pipeline, thereby reducing the risk of weld cracking.

[0005] To achieve the above object, the present invention provides the following technical solution: a HDPE three-layer wall composite reinforced pipe, comprising a composite reinforced pipe body, and further comprising:

[0006] An outer shell, the outer shell is fixedly connected to the outside of the composite reinforced pipe body;

[0007] A first rotating assembly, the first rotating assembly is movably connected to the inside of the shell, the first rotating assembly comprises a first rotating drum, the inner wall of the first rotating drum is provided with a first vertical groove and a first oblique groove in an annular shape of 180 degrees, and the inside of the first rotating drum is movably connected with a reinforcement assembly for shielding the composite reinforced pipe body;

[0008] A sealing component, wherein the sealing component is annularly distributed at seventy-one degrees inside the reinforcement component;

[0009] A second rotating assembly is movably connected inside the composite reinforced pipe body.

[0010] Preferably, the reinforcement component includes a metal baffle, which penetrates the outer wall of the outer shell on the side away from the first rotating component and extends to the outside of the outer shell. The inner and outer walls of the metal baffle are respectively provided with a first protrusion and a second protrusion in a circular shape of 180 degrees, and the first protrusion and the second protrusion are equidistantly staggered.

[0011] Preferably, one end of the first vertical groove away from the reinforcement assembly is connected to one end of the first inclined groove, the second protrusion is movably engaged in the interior of the first vertical groove in the initial state, and the arc of the first inclined groove is thirty degrees;

[0012] The first rotating drum has a first guide groove and a second guide groove formed therein at an angle of 72 degrees on one side away from the reinforcement assembly. The opposite ends of the first guide groove and the second guide groove are connected, and the first guide groove and the second guide groove are oriented in opposite directions.

[0013] Preferably, the sealing assembly includes a support plate, a gasket is fixedly connected to the side of the support plate close to the composite reinforced pipe body, the gasket is made of rubber material, the support plate and the gasket are both arc-shaped, gaps are left between several support plates, and a cavity is opened inside the metal baffle to facilitate the movement of the support plate.

[0014] Preferably, the support plate is fixedly connected to a first round rod on one side close to the first rotating component, a second round rod is movably sleeved inside the first round rod, the second round rod is movably clamped inside the first guide groove in an initial state, and a first slide groove cooperating with the second round rod is provided on the inner wall of the outer shell, and the first slide groove is used to circumferentially limit the second round rod when the first drum rotates.

[0015] Preferably, a turntable is fixedly connected to the side of the first rotating drum away from the reinforcement assembly. The turntable is located outside the shell. Two groups of bolt assemblies are threadedly connected to the outer wall of the turntable. The turntable is fixedly connected to the composite reinforced pipe body through the bolt assemblies.

[0016] Preferably, the second rotating assembly comprises a second rotating drum, the inner wall of the second rotating drum is provided with a second inclined groove in an annular shape of 180 degrees, and the arc of the second inclined groove is 180 degrees.

[0017] Preferably, the outer wall of the second rotating drum is provided with a second vertical groove and a third oblique groove in an annular shape of 180 degrees, the end of the second vertical groove away from the O-ring is connected to the third oblique groove, and the interior of the third oblique groove is movably engaged with the first protrusion.

[0018] Preferably, the inner ring of the composite reinforced pipe body is provided with square blocks at 180 degrees, and two ends of the square blocks away from the second rotating assembly are fixedly connected with O-rings. The square blocks penetrate the outer wall of the composite reinforced pipe body and extend to the outside of the composite reinforced pipe body.

[0019] Preferably, the two opposite sides of the two square blocks are fixedly connected with a third protrusion, and the third protrusion is movably clamped inside the second inclined groove;

[0020] When the square block moves toward the inside of the composite reinforced pipe body, it drives the third protrusion to slide along the track of the second inclined groove and causes the second rotating drum to rotate 180 degrees.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides additional support and protection for the welding part of the pipe mouth of the composite reinforced pipe body through the cooperation between structures such as the outer shell, the first rotating component and the reinforcement component, thereby reducing the risk of weld cracking. The second protrusion slides into the interior of the first inclined groove, and the first protrusion slides into the interior of the second vertical groove. When the first rotating drum rotates, the second vertical groove limits the circumferential position of the metal baffle plate, so that the second protrusion can only move along the trajectory of the first inclined groove toward the inside of the outer shell. After the metal baffle plate moves, it is located at the welding part of the pipe mouth of the composite reinforced pipe body, thereby providing additional physical protection for the welding part, thereby preventing hard objects from directly hitting the welding part, thereby reducing the risk of weld cracking.

[0023] The present invention improves the sealing and stability of the welding point at the pipe mouth of the composite reinforced pipe body through the cooperation between the second guide groove, the gasket and the second round rod. The second round rod is initially located inside the first guide groove, and is used to drive the second round rod and the first round rod outside it to move toward the inside of the metal baffle when the first rotating drum rotates, thereby preventing the metal baffle from abutting against the protrusion of the weld when it moves up. The second guide groove is connected to the first guide groove, and is used to make the gasket abut against the outer wall of the weld under the action of external force after the second round rod slides into the second guide groove, thereby enhancing the sealing and stability of the entire device, thereby extending the service life of the entire device.

[0024] The present invention facilitates welding of the composite reinforced pipe body with other pipes through the cooperation between structures such as the O-ring, the third protrusion and the second rotating component, thereby improving the working efficiency of the device during installation. The third protrusion is movably connected to the inside of the second inclined groove, so that when other pipes squeeze the O-ring, the third protrusion will be driven by the square block to slide along the trajectory of the second inclined groove, thereby causing the second rotating drum to rotate. After the second rotating drum rotates, the first protrusion drives the metal baffle to move toward the inside of the shell along the trajectory of the third inclined groove, thereby allowing the metal baffle to release the obstruction of the pipe mouth of the composite reinforced pipe body, thereby facilitating the operator to weld the pipe mouth. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the front cross-section structure of the present invention;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0029] Figure 5 It is a schematic diagram of the top cross-sectional structure of the present invention;

[0030] Figure 6 It is a top section partial enlarged view of the first rotating assembly of the present invention;

[0031] Figure 7 It is a schematic diagram of the positional relationship among the first rotating assembly, the reinforcing assembly and the sealing assembly of the present invention;

[0032] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0033] Fig. 9 It is an exploded view of the second rotating assembly of the present invention.

[0034] In the figure: 1. composite reinforced pipe body; 2. shell; 3. first rotating assembly; 301. first rotating drum; 302. first vertical groove; 303. first inclined groove; 304. first guide groove; 305. second guide groove; 306. rotating disk; 307. first slide groove; 4. reinforcement assembly; 401. metal baffle; 402. first protrusion; 403. second protrusion; 5. sealing assembly; 501. support plate; 502. gasket; 503. first round rod; 504. second round rod; 6. second rotating assembly; 601. second rotating drum; 602. second inclined groove; 603. second vertical groove; 604. third inclined groove; 7. O-ring; 8. square block; 9. third protrusion; 10. bolt assembly. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 the present invention.

[0036] like Figures 1 to 9 As shown, the present invention provides a HDPE three-layer wall composite reinforced pipe, including a composite reinforced pipe body 1, and also includes:

[0037] An outer shell 2, the outer shell 2 is fixedly connected to the outside of the composite reinforced pipe body 1;

[0038] A first rotating assembly 3, which is movably connected to the inside of the housing 2, and comprises a first rotating drum 301, the inner wall of which is respectively provided with a first vertical groove 302 and a first inclined groove 303 in an annular shape of 180 degrees, and a reinforcing assembly 4 for shielding the composite reinforced pipe body 1 is movably connected inside the first rotating drum 301;

[0039] The sealing component 5 is annularly distributed in the interior of the reinforcement component 4 at 71 degrees;

[0040] The second rotating assembly 6 is movably connected inside the composite reinforced pipe body 1 .

[0041] The above scheme is adopted: the second protrusion 403 slides into the inside of the first inclined groove 303, and the first protrusion 402 slides into the inside of the second vertical groove 603. When the first rotating drum 301 rotates, the second vertical groove 603 limits the circumferential position of the metal baffle 401, so that the second protrusion 403 can only move along the trajectory of the first inclined groove 303, driving the metal baffle 401 to move toward the inside of the outer shell 2. After the metal baffle 401 moves, it is located at the pipe mouth welding of the composite reinforced pipe body 1, thereby providing additional physical protection for the welding joint, thereby preventing hard objects from directly hitting the welding joint, thereby reducing the risk of weld cracking.

[0042] like Figure 1 to Figure 2 , Figures 6 to 8 As shown, the reinforcement component 4 includes a metal baffle 401, and the side of the metal baffle 401 away from the first rotating component 3 passes through the outer wall of the shell 2 and extends to the outside of the shell 2. The inner and outer walls of the metal baffle 401 are respectively provided with a first protrusion 402 and a second protrusion 403 in a circular shape of 180 degrees. The first protrusion 402 and the second protrusion 403 are equidistantly staggered. The end of the first vertical groove 302 away from the reinforcement component 4 is connected with one end of the first inclined groove 303. The second protrusion 403 is movably engaged in the inside of the first vertical groove 302 in the initial state. The arc of the first inclined groove 303 is 30 degrees. The side of the first rotating drum 301 away from the reinforcement component 4 is respectively provided with a first guide groove 304 and a second guide groove 305 in a circular shape of 72 degrees. The opposite ends of the first guide groove 304 and the second guide groove 305 are connected, and the directions of the first guide groove 304 and the second guide groove 305 are opposite.

[0043] The above scheme is adopted: the first guide groove 304 and the second guide groove 305 are in opposite directions. Its function is that when the first rotating drum 301 rotates, the second round rod 504 will first drive the first round rod 503 to move toward the inside of the metal baffle 401 along the trajectory of the first guide groove 304, thereby preventing the gasket 502 from abutting against the protruding part after welding when the metal baffle 401 moves upward, affecting the normal operation of the device. After the second round rod 504 slides into the second guide groove 305, one end of the metal baffle 401 is already located at the weld of the pipe mouth of the composite reinforced pipe body 1. At this time, the metal baffle 401 continues to move. At the same time, the second round rod 504 will drive the first round rod 503 to move along the trajectory of the second guide groove 305 toward the direction of the O-ring 7, and then drive the gasket 502 to abut against the outer wall of the weld of the composite reinforced pipe body 1 through the support plate 501, thereby improving the overall sealing of the device.

[0044] like Figures 1 to 7As shown, the sealing assembly 5 includes a support plate 501, and a gasket 502 is fixedly connected to one side of the support plate 501 close to the composite reinforced pipe body 1, and the gasket 502 is made of rubber material. The support plate 501 and the gasket 502 are both arc-shaped, and gaps are left between several support plates 501. A cavity is provided inside the metal baffle 401 to facilitate the movement of the support plate 501. A first round rod 503 is fixedly connected to one side of the support plate 501 close to the first rotating assembly 3, and a second round rod 504 is movably sleeved inside the first round rod 503. The second round rod 504 is movably clamped inside the first guide groove 304 in its initial state, and a first slide groove 307 cooperating with the second round rod 504 is provided on the inner wall of the outer shell 2. The first slide groove 307 is used to circumferentially limit the second round rod 504 when the first rotating drum 301 rotates.

[0045] The above scheme is adopted: the second round rod 504 is initially located inside the first guide groove 304, and is used to drive the second round rod 504 and the first round rod 503 outside it to move toward the inside of the metal baffle 401 when the first rotating drum 301 rotates, thereby preventing the metal baffle 401 from abutting against the protruding part of the welding position when moving up, and is connected to the first guide groove 304 through the second guide groove 305, so that after the second round rod 504 slides into the second guide groove 305, the gasket 502 abuts against the outer wall of the welding position under the action of external force, thereby enhancing the overall sealing and stability of the device, thereby extending the overall service life of the device.

[0046] like Figure 1 to Figure 2 , Figure 6 to Figure 7 , Fig. 9 As shown, a turntable 306 is fixedly connected to the side of the first rotating cylinder 301 away from the reinforcement component 4, and the turntable 306 is located outside the outer shell 2. Two groups of bolt assemblies 10 are threadedly connected to the outer wall of the turntable 306. The turntable 306 is fixedly connected to the composite reinforced pipe body 1 through the bolt assembly 10. The second rotating assembly 6 includes a second rotating cylinder 601. The inner wall of the second rotating cylinder 601 is provided with a second inclined groove 602 in an annular shape of 180 degrees. The arc of the second inclined groove 602 is 180 degrees. The outer wall of the second rotating cylinder 601 is provided with a second vertical groove 603 and a third inclined groove 604 in an annular shape of 180 degrees. The end of the second vertical groove 603 away from the O-ring 7 is connected to the third inclined groove 604, and the interior of the third inclined groove 604 is movably engaged with the first protrusion 402.

[0047] The above solution is adopted: the bolt assembly 10 is designed to facilitate fixing the position of the turntable 306 before and after rotation, so that the position of the reinforcement assembly 4 after movement is fixed, thereby ensuring the normal operation of the device.

[0048] like Figure 1 to Figure 2 , Figure 6 , Fig. 9As shown, square blocks 8 are arranged in an annular shape at 180 degrees inside the composite reinforced pipe body 1, and an O-ring 7 is fixedly connected to one end of the two square blocks 8 away from the second rotating assembly 6. The square blocks 8 penetrate the outer wall of the composite reinforced pipe body 1 and extend to the outside of the composite reinforced pipe body 1. The opposite sides of the two square blocks 8 are fixedly connected with a third protrusion 9, and the third protrusion 9 is movably clamped in the inside of the second inclined groove 602. When the square blocks 8 move toward the inside of the composite reinforced pipe body 1, they drive the third protrusion 9 to slide along the trajectory of the second inclined groove 602 and cause the second rotating drum 601 to rotate 180 degrees.

[0049] The above scheme is adopted: the third protrusion 9 is movably connected to the inside of the second inclined groove 602, so that when other pipes squeeze the O-ring 7, the third protrusion 9 will be driven by the square block 8 to slide along the trajectory of the second inclined groove 602, thereby rotating the second rotating drum 601. After the second rotating drum 601 rotates, the first protrusion 402 drives the metal baffle 401 to move toward the inside of the outer shell 2 along the trajectory of the third inclined groove 604, so that the metal baffle 401 releases the obstruction of the pipe mouth of the composite reinforced pipe body 1, thereby facilitating the operator to weld the pipe mouth.

[0050] The working principle and use process of the present invention are as follows: when it is necessary to connect the composite reinforced pipe body 1 with a bend pipe or other pipes, the operator inserts the bend pipe into the composite reinforced pipe body 1, so that one end of the bend pipe abuts against the side wall of the O-ring 7, and squeezes the O-ring 7 to move toward the inside of the composite reinforced pipe body 1. When the O-ring 7 moves, the two square blocks 8 and the third protrusion 9 thereon are driven to move in the same direction, and the third protrusion 9 slides along the track of the second inclined groove 602. At this time, the third protrusion 9 cooperates with the second inclined groove 602, so that the second rotating drum 601 rotates;

[0051] When the second drum 601 rotates, since the first protrusion 402 is movably engaged with the inside of the third inclined groove 604, and the second protrusion 403 is movably engaged with the inside of the first vertical groove 302, the first vertical groove 302 circumferentially limits the reinforcing component 4 in the initial state, so that when the second drum 601 rotates, the first protrusion 402 drives the metal baffle 401 to move toward the inside of the shell 2 along the trajectory of the third inclined groove 604. When the O-ring 7 is completely retracted to the inside of the composite reinforced pipe body 1, the first protrusion 402 slides to the inside of the second vertical groove 603, and the second protrusion 403 slides to the inside of the first inclined groove 303. At the same time, the metal baffle 401 releases the obstruction of the pipe mouth of the composite reinforced pipe body 1, thereby facilitating the operator to weld the composite reinforced pipe body 1 with the elbow or other pipes;

[0052] When the composite reinforced pipe body 1 is welded to the other pipes, the operator rotates the bolt assembly 10 to release the turntable 306 from the composite reinforced pipe body 1. Then, the turntable 306 is rotated to drive the first rotating drum 301 to rotate. While the first rotating drum 301 rotates, the position of the O-ring 7 is fixed due to the welding of the composite reinforced pipe body 1 to the other pipes, so that the second rotating assembly 6 cannot rotate, so that the second vertical groove 603 circumferentially limits the first protrusion 402, so that the turntable When the second protrusion 403 rotates, it can only drive the second protrusion 403 to slide along the track of the first inclined groove 303. When the second protrusion 403 slides to the end of the first inclined groove 303 away from the first vertical groove 302, at this time, through the cooperation between the second protrusion 403 and the first inclined groove 303, the metal baffle 401 moves toward the outside of the shell 2 and blocks the pipe mouth of the composite reinforced pipe body 1 again, thereby providing additional physical protection for the welding part between the composite reinforced pipe body 1 and other pipes, thereby reducing the direct impact and damage of external factors on the welding part;

[0053] When the first rotating drum 301 rotates, the second round rod 504 is driven to slide along the track of the first guiding groove 304, so that the first round rod 503 is driven to move in the same direction through the second round rod 504. When the first round rod 503 slides, the supporting plate 501 fixed at one end thereof is driven to move toward the inside of the metal baffle 401, so that the gasket 502 is driven to shrink to the inside of the metal baffle 401 through the supporting plate 501. When the second round rod 504 slides to the inside of the second guiding groove 305, at this time, the rotating disk 306 drives the first rotating drum 301 to continue rotating, so that the second round rod 504 The second round rod 504 drives the first round rod 503 to move toward the direction of the O-ring 7 along the trajectory of the second guide groove 305. When the first round rod 503 moves, the gasket 502 is driven to move in the same direction through the support plate 501. When the second round rod 504 abuts against the inner wall of the second guide groove 305 away from the end of the first guide groove 304, the gasket 502 abuts against the outer wall of the composite reinforced pipe body 1 under the action of external force, and seals and dampens the welding between the composite reinforced pipe body 1 and other pipes, thereby improving the stability of the composite reinforced pipe body 1 during operation;

[0054] When the above operations are completed, the turntable 306 is re-fixed on the composite reinforced pipe body 1 by the bolt assembly 10, so that the turntable 306 cannot rotate, thereby fixing the overall position of the reinforcement assembly 4 and the sealing assembly 5, and finally completing the operation.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such 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 including 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.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A HDPE three-layer wall composite reinforced pipe, comprising a composite reinforced pipe body (1), characterized in that: Also includes: An outer shell (2), the outer shell (2) being fixedly connected to the outside of the composite reinforced pipe body (1); A first rotating assembly (3), the first rotating assembly (3) being movably connected to the interior of the housing (2), the first rotating assembly (3) comprising a first rotating drum (301), the inner wall of the first rotating drum (301) being provided with first vertical grooves (302) and first inclined grooves (303) in an annular manner of 180 degrees, and a reinforcing assembly (4) for shielding the composite reinforced pipe body (1) being movably connected to the interior of the first rotating drum (301); A sealing component (5), the sealing component (5) is annularly distributed at 71 degrees inside the reinforcement component (4); A second rotating assembly (6), wherein the second rotating assembly (6) is movably connected inside the composite reinforced pipe body (1).

2. The HDPE three-layer wall composite reinforced pipe according to claim 1, characterized in that: The reinforcing component (4) comprises a metal baffle (401), wherein the side of the metal baffle (401) away from the first rotating component (3) penetrates the outer wall of the outer shell (2) and extends to the outside of the outer shell (2), and the inner and outer walls of the metal baffle (401) are respectively provided with a first protrusion (402) and a second protrusion (403) in an annular manner at 180 degrees, and the first protrusion (402) and the second protrusion (403) are equidistantly and staggeredly arranged.

3. The HDPE three-layer wall composite reinforced pipe according to claim 2, characterized in that: One end of the first vertical groove (302) away from the reinforcement assembly (4) is connected to one end of the first inclined groove (303); the second protrusion (403) is movably engaged inside the first vertical groove (302) in an initial state; and the arc of the first inclined groove (303) is thirty degrees; A first guide groove (304) and a second guide groove (305) are respectively provided in an annular manner at an angle of 72 degrees on one side of the first rotating drum (301) away from the reinforcement component (4); opposite ends of the first guide groove (304) and the second guide groove (305) are connected; and the first guide groove (304) and the second guide groove (305) are oriented in opposite directions.

4. The HDPE three-layer wall composite reinforced pipe according to claim 2, characterized in that: The sealing assembly (5) comprises a support plate (501), a gasket (502) being fixedly connected to one side of the support plate (501) close to the composite reinforced pipe body (1), the gasket (502) being made of a rubber material, the support plate (501) and the gasket (502) both being arc-shaped, gaps being left between a plurality of the support plates (501), and a cavity being provided inside the metal baffle (401) for facilitating the movement of the support plate (501).

5. The HDPE three-layer wall composite reinforced pipe according to claim 4, characterized in that: The support plate (501) is fixedly connected to a first round rod (503) on one side close to the first rotating assembly (3); a second round rod (504) is movably sleeved inside the first round rod (503); the second round rod (504) is movably clamped inside the first guide groove (304) in an initial state; a first slide groove (307) cooperating with the second round rod (504) is provided on the inner wall of the housing (2); the first slide groove (307) is used to circumferentially limit the second round rod (504) when the first rotating drum (301) rotates.

6. The HDPE three-layer wall composite reinforced pipe according to claim 2, characterized in that: A turntable (306) is fixedly connected to the side of the first rotating drum (301) away from the reinforcement assembly (4); the turntable (306) is located outside the outer shell (2); two groups of bolt assemblies (10) are threadedly connected to the outer wall of the turntable (306); and the turntable (306) is fixedly connected to the composite reinforced pipe body (1) via the bolt assemblies (10).

7. The HDPE three-layer wall composite reinforced pipe according to claim 2, characterized in that: The second rotating assembly (6) comprises a second rotating drum (601), the inner wall of the second rotating drum (601) is provided with a second inclined groove (602) in an annular shape of 180 degrees, and the arc of the second inclined groove (602) is 180 degrees.

8. The HDPE three-layer wall composite reinforced pipe according to claim 7, characterized in that: The outer wall of the second rotating cylinder (601) is provided with a second vertical groove (603) and a third inclined groove (604) in an annular manner of 180 degrees. The end of the second vertical groove (603) away from the O-ring (7) is connected to the third inclined groove (604). The interior of the third inclined groove (604) is movably engaged with the first protrusion (402).

9. The HDPE three-layer wall composite reinforced pipe according to claim 1, characterized in that: The inner ring of the composite reinforced pipe body (1) is provided with square blocks (8) at an angle of 180 degrees, and one end of the two square blocks (8) away from the second rotating assembly (6) is fixedly connected with an O-ring (7), and the square blocks (8) penetrate the outer wall of the composite reinforced pipe body (1) and extend to the outside of the composite reinforced pipe body (1).

10. The HDPE three-layer wall composite reinforced pipe according to claim 9, characterized in that: The two opposite sides of the two square blocks (8) are both fixedly connected with a third protrusion (9), and the third protrusion (9) is movably engaged in the interior of the second inclined groove (602); When the square block (8) moves toward the inside of the composite reinforced pipe body (1), it drives the third protrusion (9) to slide along the track of the second inclined groove (602) and causes the second rotating drum (601) to rotate 180 degrees.

Images