Polyethylene spiral corrugated pipe connecting structure

Abstract

The invention relates to the field of polyethylene corrugated pipes, in particular to a polyethylene spiral corrugated pipe connecting structure. The polyethylene spiral corrugated pipe connecting structure comprises two sections of corrugated pipe bodies, two ends of each corrugated pipe body are integrally connected with joint pipes, the polyethylene spiral corrugated pipe connecting structure further comprises a sealed connecting piece, the sealed connecting piece comprises two sections of positioning pipes, the joint pipes are fixed on the positioning pipes in a hot melting connection mode, and the two sections of positioning pipes are integrally connected with the joint pipes. Connecting seats are welded and fixed to the other ends of the two sections of positioning pipes, the two connecting seats are connected in a buckled mode, and an inflatable sealing ring is fixed between the two connecting seats in an embedded mode; the two groups of hoops are respectively sleeved and fixed at the outer parts of the joint pipes in the two sections of corrugated pipe bodies; and the hanging buckle type locking assembly is composed of a hook piece and a locking piece. According to the polyethylene spiral corrugated pipe connecting structure, the two sections of corrugated pipes can be rapidly disassembled and assembled, and meanwhile higher sealing performance is achieved.

Description

Technical Field

[0001] The invention relates to the field of polyethylene corrugated pipes, and in particular to a polyethylene spiral corrugated pipe connection structure. Background Art

[0002] A bellows is a tubular elastic sensitive element constructed from foldable corrugated sheets connected along the folding and stretching direction. It features a cylindrical, thin-walled, corrugated shell with multiple transverse corrugations. It is elastic and can displace in response to pressure, axial force, transverse force, or bending moment. Bellows are primarily used as measuring elements in pressure measuring instruments, converting pressure into displacement or force. Bellows have thin walls and high sensitivity, with a measurement range from tens of Pa to tens of MPa. The open end is fixed, while the sealed end is free, and an auxiliary coil spring or reed is used to increase its elasticity. During operation, the bellows stretches along its length under the influence of internal pressure, causing the movable end to displace in a manner proportional to the pressure. The movable end drives a pointer to directly indicate the pressure.

[0003] When connecting multiple sections of corrugated pipe, hot melt extrusion welding, electric hot melt tape, heat shrink tubing, and clamps are commonly used. While these methods offer sufficient strength and sealing, they are not conducive to disassembly. Consequently, subsequent disassembly and repair of the pipes becomes cumbersome and difficult. While clamps allow for quick connection of the corrugated pipes, they compromise the sealing between the two sections.

[0004] Therefore, it is necessary to provide a new polyethylene spiral corrugated pipe connection structure to solve the above technical problems. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a polyethylene spiral corrugated pipe connection structure.

[0006] The polyethylene spiral corrugated pipe connection structure provided by the present invention comprises two sections of corrugated pipe bodies, both ends of which are integrally connected to joint pipes, and further comprises:

[0007] A sealed connector comprising two sections of positioning tubes, the joint tube being fixed to the positioning tubes by heat-melting, the other ends of the two sections of the positioning tubes being welded and fixed with connecting seats, the two sets of connecting seats being snap-fitted together, and an inflatable sealing ring being embedded and fixed between the two sets of connecting seats;

[0008] Clamps, which are in two groups and are respectively sleeved and fixed on the outside of the joint pipes in the two sections of the corrugated pipe body, and are located in the connection area between the joint pipe and the positioning pipe;

[0009] A hook-type locking assembly consists of a hook part and a locking part, which are respectively fixed on two sets of clamps. The hook part is buckled and fixed on the locking part, so that the two sets of connecting seats in the bite state are stably connected.

[0010] Preferably, a retaining ring is welded and fixed to the circumferential outer wall of the positioning tube, and the retaining ring abuts against the end of the joint tube.

[0011] Preferably, a plurality of tooth blocks distributed in an annular shape and arranged equidistantly are integrally connected to one side of the connecting seat, a tooth groove is formed between two adjacent tooth blocks, and the tooth blocks in any connecting seat are inserted into the tooth groove at the end of the other connecting seat.

[0012] Preferably, an open annular groove is formed starting from the end surface of the tooth block and extending to the interior of the connecting seat. When the two connecting seats are buckled and connected, the open annular grooves in the two connective seats form a sealing annular groove, and a hole communicating with the sealing annular groove is formed on one of the tooth blocks.

[0013] The inflatable sealing ring is embedded and fixed in the sealing ring groove. An air nozzle for inflation is provided on one side of the inflatable sealing ring. The air nozzle is arranged along the hole and is connected to the outer side of the seat.

[0014] Preferably, the clamp is two semi-annular clamps, which are fixed by bolts to form a complete ring, and cooperate with the positioning tube to lock the joint tube.

[0015] Preferably, there are at least four sets of hook-type locking components on the two clamps.

[0016] Preferably, the hook member includes a first positioning seat, the first positioning seat is welded and fixed to the circumferential outer wall of the clamp, a mounting seat is rotatably connected to the first positioning seat via a rotating shaft, a positioning rod is welded and fixed to the other end of the mounting seat, a baffle is welded and fixed to the other end of the positioning rod, a sliding seat is slidably connected to the positioning rod, and a spring is also sleeved thereon, one end of the spring is pressed against the baffle, and the other end is pressed against the sliding seat;

[0017] A moving rod parallel to the positioning rod is welded on the sliding seat, and a hook is welded on the other end of the moving rod.

[0018] Preferably, the locking member includes a second positioning seat, which is welded and fixed to the circumferential outer wall of the clamp and is symmetrically arranged on the first positioning seat, and a clamping rod is fixed on the second positioning seat;

[0019] The hook can be engaged with the clamping rod, and in the engaged state, the spring is in a compressed state.

[0020] Preferably, a pull ring is welded and fixed on the movable rod.

[0021] Compared with the related art, the polyethylene spiral corrugated pipe connection structure provided by the present invention has the following beneficial effects:

[0022] 1. The positioning tube in the sealed connector is connected to the joint tube in the bellows body by hot-melt connection, which has sufficient connection strength and sealing. The other end of the positioning tube is equipped with a connecting seat that can be assembled in a bite-fitting manner. The two sets of connecting seats can achieve stable linearity of the two sections of the bellows in the bite state to achieve a preliminary connection between the two. At the same time, the clamp is used for reinforcement to prevent the joint tube and the positioning tube from being disengaged, thereby enhancing the stability of the connection.

[0023] 2. An inflatable sealing ring is installed between the two sets of connecting seats. By injecting gas to change its expansion degree, it can better fill the gap between the two sets of connecting seats, thereby improving the sealing effect and preventing medium leakage;

[0024] 3. In the hook-type locking assembly, the hook part can be connected to the locking part by snapping. In the connected state, the two sets of connecting seats can be pulled in the axial direction and in opposite directions to ensure a stable connection between the two sets of connecting seats, thereby better cooperating with the inflatable sealing ring for sealing. At the same time, the hook part and the locking part have the feature of quick release, so it will be more convenient to disassemble and replace the bellows in a targeted manner when it is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A structural schematic diagram of a preferred embodiment of the polyethylene spiral corrugated pipe connection structure provided by the present invention;

[0026] Figure 2 The present invention shows Figure 1 Schematic diagram of the structure of a local explosion;

[0027] Figure 3 This is a schematic structural diagram of the sealed connector shown in the present invention. Figure 1 ;

[0028] Figure 4 This is a schematic structural diagram of the sealed connector shown in the present invention. Figure 2 ;

[0029] Figure 5 This is a schematic structural diagram of the coupling connection between the clamp and the hook-type locking assembly shown in the present invention;

[0030] Figure 6 It is a structural schematic diagram of the hook member shown in the present invention;

[0031] Figure 7 Schematic diagram of the structure of the locking member shown in the present invention.

[0032] Numbers in the figure: 1, bellows body; 11, joint pipe;

[0033] 2. Sealed connector; 21. Positioning tube; 22. Retaining ring; 23. Connecting seat; 24. Tooth block; 25. Tooth groove; 26. Open ring groove; 27. Inflatable sealing ring; 28. Air nozzle;

[0034] 3. Clamp;

[0035] 4. Buckle type locking assembly;

[0036] 41. Hook member; 411. First positioning seat; 412. Rotating shaft; 413. Mounting seat; 414. Positioning rod; 415. Sliding seat; 416. Baffle; 417. Spring; 418. Moving rod; 419. Hook; 4110. Pull ring; 42. Locking member; 421. Second positioning seat; 422. Clamping rod. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0039] See also Figures 1 to 7 The embodiment of the present invention provides a polyethylene spiral corrugated pipe connection structure, which includes a corrugated pipe body 1, a sealing connector 2, a clamp 3 and a hook-type locking assembly 4;

[0040] The bellows body 1 is divided into two sections, and joint pipes 11 are integrally connected to both ends of the bellows body 1 .

[0041] For sealed connector 2;

[0042] See also Figure 3 and Figure 4 The sealed connector 2 includes two sections of positioning tubes 21. The joint tube 11 is fixed to the positioning tube 21 by hot-melt connection. A retaining ring 22 is welded and fixed to the circumferential outer wall of the positioning tube 21. The other end of the joint tube 11 is pressed against the retaining ring 22 to position the connection between the joint tube 11 and the positioning tube 21. The other ends of the two sections of positioning tubes 21 are welded and fixed with a connecting seat 23. One side of the connecting seat 23 is integrally connected with a plurality of annularly distributed and equidistant tooth blocks 24. A tooth groove 25 is formed between two adjacent tooth blocks 24, and the tooth blocks 24 in any connecting seat 23 are inserted into the tooth groove 25 at the end of the other connecting seat 23.

[0043] Starting from the end face of the tooth block 24, an open annular groove 26 is provided extending to the interior of the connecting seat 23. When the two connecting seats 23 are buckled and connected, the open annular grooves 26 in the two form a sealing ring groove, and a hole communicating with the sealing ring groove is provided on one of the tooth blocks 24. An inflatable sealing ring 27 is embedded and fixed in the sealing ring groove. The inflatable sealing ring 27 also has an air nozzle 28 for inflation on one side. The air nozzle 28 is provided along the hole and is arranged on the outer side of the connecting seat 23.

[0044] It should be noted that in the sealed connector 2, the diameter of the positioning tube 21 should be smaller than the diameter of the joint tube 11. When connecting the two, the positioning tube 21 is inserted into the joint tube 11 and then connected by hot melting, which makes it have higher connection strength and sealing. At the same time, a retaining ring 22 is provided on the circumferential outer wall of the positioning tube 21. The retaining ring 22 can abut against the end face of the joint tube 11 and is used to locate the insertion depth between the joint tube 11 and the positioning tube 21, thereby improving assembly accuracy.

[0045] The other end of the positioning tube 21 has a connecting seat 23, and the other end of the connecting seat 23 is integrally connected to a plurality of annularly distributed tooth blocks 24, and tooth grooves 25 are formed between adjacent tooth blocks 24. Therefore, after completing the connection between the positioning tube 21 and the corrugated pipe body 1, the connecting seat 23 can be used to assemble the two sections of the corrugated pipe body 1, that is, the tooth blocks 24 in the two groups of connecting seats 23 are inserted into each other's tooth grooves 25, so that the two groups of connecting seats 23 are preliminarily fastened together through the tooth blocks 24, which can play a mutual restrictive role for the two groups of corrugated pipe bodies 1. If the two groups of corrugated pipe bodies 1 are connected in this way, they can be detachable. Therefore, when any section of the pipe is damaged later, it can be disassembled and replaced in a targeted manner.

[0046] An open annular groove 26 extending to the connecting seat 23 is provided on one side of the tooth block 24. When the two groups of connecting seats 23 are buckled and connected to each other, the open annular grooves 26 in the two groups form a sealing ring groove. Therefore, before the two groups of connecting seats 23 are docked and installed, the inflatable sealing ring 27 can be embedded and fixed in the open annular groove 26 on one of the connecting seats 23, and the air nozzle 28 on the inflatable sealing ring 27 is passed through the hole on the tooth block 24. After the installation of the inflatable sealing ring 27 is completed, the connecting seats 23 can be buckled and connected so that the inflatable sealing ring 27 is inside the sealing ring groove. The air nozzle 28 can be used to inject gas into the inflatable sealing ring 27 to make it expand. After expansion, the inflatable sealing ring 27 can better fill the gap between the two groups of connecting seats 23, so the sealing performance will be better (the inflatable sealing ring 27 is preferably made of flexible rubber material, so it can expand itself after inflation, and the effect of filling the gap will be better).

[0047] For clamp 3;

[0048] See also Figure 2 There are two groups of clamps 3, which are two semi-annular clamps. The two clamps are fixed by bolts to form a complete ring, which are respectively fixed on the outside of the joint pipe 11 in the two sections of the corrugated pipe body 1, and are located in the connection area between the joint pipe 11 and the positioning pipe 21 to cooperate with the positioning pipe 21 to lock the joint pipe 11.

[0049] It should be noted that the clamp 3 is composed of two semi-annular clamps, and the two sets of clamps are connected to form a complete ring, which can be sleeved on the outside of the joint pipe 11. At the same time, it is located in the connection area between the joint pipe 11 and the positioning pipe 21. The two sets of clamps are reinforced by bolts. The clamp 3 can be used to further reinforce the joint pipe 11 and the positioning pipe 21, so that the two have higher stability. The clamp 3 also serves as the installation basis for the hook-type locking assembly 4. When the clamp 3 is in a stable state, the stable installation of the hook-type locking assembly 4 can be guaranteed.

[0050] For the hook member 41 and the locking member 42;

[0051] See also Figures 5 to 7 The hook member 41 includes a first positioning seat 411, which is welded and fixed to the circumferential outer wall of the clamp 3. A mounting seat 413 is rotatably connected to the first positioning seat 411 through a rotating shaft 412. A positioning rod 414 is welded and fixed to the other end of the mounting seat 413. A baffle 416 is welded and fixed to the other end of the positioning rod 414. A slide 415 is slidably connected to the positioning rod 414, and a spring 417 is also sleeved thereon. One end of the spring 417 presses against the baffle 416, and the other end presses against the slide 415.

[0052] A moving rod 418 parallel to the positioning rod 414 is welded to the sliding seat 415 , a hook 419 is welded to the other end of the moving rod 418 , and a pull ring 4110 is also welded and fixed to the moving rod 418 .

[0053] See also Figures 1 to 3 The locking member 42 includes a second positioning seat 421, which is welded and fixed to the circumferential outer wall of the clamp 3 and symmetrically arranged on the first positioning seat 411. A clamping rod 422 is fixed on the second positioning seat 421;

[0054] The hook 419 can be engaged with the latch rod 422 , and in the engaged state, the spring 417 is in a compressed state.

[0055] It should be noted that the hook member 41 includes a first positioning seat 411, on which a mounting seat 413 is mounted via an axis so that the mounting seat 413 can rotate. A positioning rod 414 is fixed to the mounting seat 413, and the positioning rod 414 has a slide 415 that can move along the axial direction. A spring 417 is also sleeved on the slide 415, and the force exerted by the spring 417 on the slide 415 is toward the first positioning seat 411. A moving rod 418 is also fixed to the slide 415, and the other end of the moving rod 418 has a hook 419.

[0056] The locking member 42 includes a second positioning seat 421 , a latching rod 422 is fixed to the second positioning seat 421 , and the hook 419 can be fastened to the latching rod 422 ;

[0057] The first positioning seat 411 and the second positioning seat 421 are fixed on the two clamps 3 respectively. Therefore, when connecting the two, the pull ring 4110 can be hooked with a finger or other tool, and then the pull ring 4110 is used to pull the moving rod 418 and the slide 415 to move. When the slide 415 moves, it needs to overcome the elastic force of the spring 417 until the hook 419 moves to the position of the clamping rod 422. Then, the position of the hook 419 is adjusted by rotating the mounting seat 413, and then the hook 419 is buckled with the clamping rod 422. When the two are in the buckled state, the spring 417 is compressed, thereby having a relatively large elastic potential energy. Under the action of this elastic force, the hook 419 and the clamping rod 422 can be firmly buckled and will not be disengaged.

[0058] The hook-type locking assembly 4 is the main limiting structure between the two sections of the bellows body 1. There are at least 4 groups of them, and they are distributed equidistantly in a ring shape. Therefore, the limiting effect on the two sections of the bellows body 1 is more uniform, and it is very convenient to disassemble and assemble.

[0059] The specific connection process between bellows is as follows:

[0060] (1) The connection between the sealing connector and the bellows body;

[0061] Insert one end of the positioning tube 21 into the joint tube 11 until the end of the positioning tube 21 touches the retaining ring 22. At this time, the connection state of the positioning tube 21 and the joint tube 11 is positioned. Then, the joint tube 11 and the positioning tube 21 are fixed by hot melting to make the connection between the two more stable.

[0062] (2) Installation of the inflatable sealing ring and docking between the connecting seats;

[0063] An open annular groove 26 extending to the connecting seat 23 is provided on one side of the tooth block 24. When the two groups of connecting seats 23 are buckled and connected to each other, the open annular grooves 26 in the two groups form a sealing ring groove. Therefore, before the two groups of connecting seats 23 are butt-jointed and installed, the inflatable sealing ring 27 can be embedded and fixed in the open annular groove 26 on one of the connecting seats 23, and the air nozzle 28 on the inflatable sealing ring 27 is passed through the hole on the tooth block 24. After the installation of the inflatable sealing ring 27 is completed, the connecting seats 23 can be buckled and connected, that is, the tooth blocks 24 in the two groups of connecting seats 23 are inserted into each other's tooth grooves 25, so that the inflatable sealing ring 27 is inside the sealing ring groove, and the air nozzle 28 can be used to inject gas into the inflatable sealing ring 27 to make it expand. After expansion, the inflatable sealing ring 27 can better fill the gap between the two groups of connecting seats 23.

[0064] (3) Installation of clamps;

[0065] Put the two semi-circular clamps in the clamp 3 on the joint pipe 11 to form a complete ring, and then use bolts to fix the contact position of the two clamps so that the clamp 3 can lock the joint pipe 11;

[0066] (4) Installation of the hook-type locking assembly;

[0067] When connecting the two, you can hook the pull ring 4110 with your fingers or other tools, and then use the pull ring 4110 to pull the moving rod 418 and the slide 415 to move. When the slide 415 moves, it needs to overcome the elastic force of the spring 417 until the hook 419 moves to the position of the card rod 422, and then adjust the position of the hook 419 by rotating the mounting base 413, and then make the hook 419 and the card rod 422 engage with each other. When the two are in the engaged state, the spring 417 is compressed, thereby having a relatively large elastic potential energy. Under the action of this elastic force, the hook 419 and the card rod 422 can be firmly engaged without disengagement.

[0068] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A polyethylene spiral corrugated pipe connection structure, comprising two sections of corrugated pipe bodies (1), both ends of the corrugated pipe bodies (1) being integrally connected with joint pipes (11), characterized in that: Also includes: A sealed connector (2), the sealed connector (2) comprising two sections of positioning tubes (21), the joint tube (11) being fixed to the positioning tubes (21) by means of a hot melt connection, the other ends of the two sections of the positioning tubes (21) being welded and fixed with a connecting seat (23), the two groups of the connecting seats (23) being snap-fitted and connected, and an inflatable sealing ring (27) being embedded and fixed between the two groups of the connecting seats (23); Clamps (3), the clamps (3) are in two groups, respectively sleeved and fixed on the outside of the joint pipes (11) in the two sections of the corrugated pipe body (1), and located in the connection area between the joint pipe (11) and the positioning pipe (21); A hook-type locking assembly (4) is composed of a hook member (41) and a locking member (42), wherein the hook member (41) and the locking member (42) are respectively fixed to two groups of clamps (3), and the hook member (41) is fastened and fixed to the locking member (42), so that the two groups of connecting seats (23) in a bite state are stably connected.

2. The polyethylene spiral corrugated pipe connection structure according to claim 1, characterized in that: A retaining ring (22) is welded and fixed to the circumferential outer wall of the positioning tube (21), and the retaining ring (22) abuts against the end of the joint tube (11).

3. The polyethylene spiral corrugated pipe connection structure according to claim 1, characterized in that: One side of the connecting seat (23) is integrally connected with a plurality of tooth blocks (24) distributed in an annular shape and arranged at equal intervals, and a tooth groove (25) is formed between two adjacent tooth blocks (24), and the tooth block (24) in any connecting seat (23) is inserted into the tooth groove (25) at the end of the other connecting seat (23).

4. The polyethylene spiral corrugated pipe connection structure according to claim 3, characterized in that: An open annular groove (26) is formed starting from the end surface of the tooth block (24) and extending to the interior of the connecting seat (23). When the two connecting seats (23) are fastened and connected, the open annular grooves (26) in the two connective seats form a sealing annular groove, and a hole communicating with the sealing annular groove is formed on one of the tooth blocks (24). The inflatable sealing ring (27) is embedded and fixed in the sealing ring groove. A gas nozzle (28) for inflation is also provided on one side of the inflatable sealing ring (27). The gas nozzle (28) is provided along the hole through the outer side of the connecting seat (23).

5. The polyethylene spiral corrugated pipe connection structure according to claim 1, characterized in that: The clamp (3) is two semi-annular clamps, which are fixed by bolts to form a complete ring, and cooperate with the positioning tube (21) to lock the joint tube (11).

6. The polyethylene spiral corrugated pipe connection structure according to claim 5, characterized in that: At least four groups of hook-type locking components (4) are provided on the two clamps (3).

7. The polyethylene spiral corrugated pipe connection structure according to claim 1, characterized in that: The hook member (41) includes a first positioning seat (411), the first positioning seat (411) is welded and fixed to the circumferential outer wall of the clamp (3), a mounting seat (413) is rotatably connected to the first positioning seat (411) via a rotating shaft (412), a positioning rod (414) is welded and fixed to the other end of the mounting seat (413), a baffle (416) is welded and fixed to the other end of the positioning rod (414), a slide seat (415) is slidably connected to the positioning rod (414), and a spring (417) is also sleeved thereon, one end of the spring (417) is pressed against the baffle (416), and the other end is pressed against the slide seat (415); A moving rod (418) arranged parallel to the positioning rod (414) is welded on the sliding seat (415), and a hook (419) is welded on the other end of the moving rod (419).

8. The polyethylene spiral corrugated pipe connection structure according to claim 1, characterized in that: The locking member (42) includes a second positioning seat (421), the second positioning seat (421) is welded and fixed to the circumferential outer wall of the clamp (3), and is symmetrically arranged on the first positioning seat (411), and a clamping rod (422) is fixed on the second positioning seat (421); The hook (419) can be engaged with the latch rod (422), and in the engaged state, the spring (417) is in a compressed state.

9. The polyethylene spiral corrugated pipe connection structure according to claim 7, characterized in that: A pull ring (4110) is also welded and fixed on the moving rod (418).

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