Stable mechanical stress testing device for plastic pipe

Abstract

The invention relates to the technical field of stress testing devices. The stable mechanical stress testing device for the plastic pipe comprises a constant-temperature water tank and further comprises a tank cover, a lifting frame, a placement plate and a clamping mechanism, the tank cover is arranged at the top end of the constant-temperature water tank in a liftable mode, the lifting frame is fixedly connected to the tank cover and ascends and descends along with the tank cover, the placement plate is fixedly connected to the bottom end of the tank cover, and the clamping mechanism is arranged on the placement plate. The clamping mechanism is used for clamping the pressing clamping pieces at the two ends of the plastic pipe, the clamping mechanism comprises supporting frames and clamping plates, the containing plate is fixedly connected to the bottom end of the box cover through the supporting frames, the clamping plates are movably arranged between every two adjacent supporting frames, the number of the clamping plates in each set is two, and the two clamping plates move relatively. By means of the technical scheme, the problems that in the prior art, manual carrying and placing of plastic pipes are strenuous, and the plastic pipes are prone to being damaged when directly placed into the water tank are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of stress testing devices, and more specifically, to a stable mechanical stress testing device for plastic pipes. Background Art

[0002] After the production of plastic pipes, in order to ensure the quality of the pipes, corresponding quality standards and inspection methods need to be specified. The quality standards of plastic pipes include aspects such as appearance quality, mechanical properties, and chemical properties. Among various tests, the hydrostatic pressure resistance test is an important part of pipe testing. Generally, a hydrostatic testing machine is used to test the pressure-resistant failure time or the maximum pressure value of instantaneous bursting of plastic pipes under long-term constant internal pressure and constant temperature, or to conduct quality inspection on the pipes by setting a pressure value to pressurize the plastic pipes, as long as the pipes do not deform or leak.

[0003] When the current testing device conducts stress testing on plastic pipes, it clamps the pressure application clamps at both ends of the plastic pipe, fills the pipe to be tested with water to ensure the accuracy of the pressure value, then connects the pipe to the hydrostatic equipment, places the connected pipe in a constant temperature water tank, and sets various parameters to conduct a pressure test. After a certain period of time, the plastic pipe is taken out, and if there are no bulges or cracks on the surface of the pipe, it indicates that the quality is good.

[0004] Currently, during testing, generally, the water-filled pipe is manually placed into the constant temperature water tank and taken out after the test. The water-filled plastic pipe and the pressure application clamps added at both ends thereof have a certain weight, and the testing personnel need to frequently carry the plastic pipe, resulting in a relatively high working intensity. At the same time, when placing the pipe into the interior of the water tank, the pipe needs to be lifted, and since the pipe is directly placed inside the water tank, the movement of the pipe during the pressurization process may also affect the test results. The pipe is prone to breakage due to shaking or collision when it moves after being pressurized. Summary of the Invention

[0005] The present invention provides a stable mechanical stress testing device for plastic pipes, which solves the problems in the prior art that manually carrying and placing plastic pipes is laborious and the plastic pipes are easily damaged when directly placed inside the water tank.

[0006] The technical solution of the present invention is as follows: A stable mechanical stress testing device for plastic pipes, including a constant temperature water tank, further comprising: A tank cover, which is liftably arranged at the top of the constant temperature water tank; A lifting frame, which is fixedly connected to the tank cover and lifts with the tank cover, and is used for lifting the plastic pipe; A placement plate, which is fixedly connected to the bottom end of the tank cover and is used for placing the plastic pipe to be tested; Clamping mechanism, which is arranged on the placing plate and used to clamp the pressure test fittings at both ends of the plastic pipe. The clamping mechanism includes: Support frames. There are multiple support frames. The placing plate is fixedly connected to the bottom end of the box cover through the support frames. Clamping plates. The clamping plates are movably arranged between two adjacent support frames. There are multiple groups of clamping plates, and the number of each group of clamping plates is two. The two clamping plates move relatively to clamp the pressure test fittings at both ends of the plastic pipe.

[0007] To reduce the influence of the pressure test pipeline on the sealing of the constant temperature water tank, pipeline holes for the pressure test pipeline to pass through are opened on both the constant temperature water tank and the box cover, and a sealing ring is fixedly connected inside the pipeline holes.

[0008] To limit the pressure test pipeline in the pipeline hole, a wire clamping component is also included. The wire clamping component is used to limit the pressure test pipeline in the pipeline hole. The wire clamping component includes: Wire clamping frame. The wire clamping frame is in a U shape, and a wire clamping groove matching the wire clamping frame is opened on the constant temperature water tank. Clamping member. The clamping member is arranged on the constant temperature water tank and is used to clamp the wire clamping frame. The clamping member includes: Clamping block. A clamping groove is opened on the constant temperature water tank. The clamping block is connected inside the clamping groove through a compression spring. The clamping groove communicates with the wire clamping groove, and a clamping hole matching the clamping block is opened on the wire clamping frame.

[0009] To ensure the stability of the lifting of the box cover, a limiting member is also included. The limiting member is used to limit the box cover. The limiting member includes: Limiting rod. The limiting rod is fixedly connected to the bottom end of the box cover. Limiting seat. The limiting seat is fixedly connected to the constant temperature water tank, and the limiting rod and the limiting seat are in sliding fit.

[0010] To facilitate moving the plastic pipe on the lifting frame to the placing plate, a transfer component is also included. The transfer component includes: Transfer plate. The transfer plate is rotatably connected to one end of the lifting frame close to the constant temperature water tank. Blocking rod. The blocking rod is fixedly connected to one side of the constant temperature water tank close to the lifting frame, and one end of the transfer plate away from the lifting frame contacts the blocking rod. First limiting block. The first limiting block is fixedly connected to the lifting frame. When the lifting frame rises to the highest position, the transfer plate rotates to a horizontal position and contacts the first limiting block. At this time, the transfer plate contacts the placing plate.

[0011] To prevent the transfer plate from rotating forward above the lifting frame, a second limiting block is fixedly connected to the lifting frame to prevent the transfer plate from rotating forward to the front side of the lifting frame.

[0012] To reduce the shaking of the plastic pipe on the lifting frame, a placement groove is provided at the top of the lifting frame for placing the plastic pipe to be detected.

[0013] To further reduce the shaking of the pressure testing pipeline, a wire management ring is further included. The wire management ring is fixedly connected to the clamping plate, and an opening is provided on the wire management ring for clamping the pressure testing pipeline.

[0014] To ensure the sealing between the box cover and the constant temperature water tank, a sealing gasket is fixedly connected to the bottom end of the box cover, and the sealing gasket is in sealed sliding fit with the constant temperature water tank.

[0015] The working principle and beneficial effects of the present invention are as follows: 1. In the present invention, the box cover can drive the placement plate and the lifting frame to rise and fall synchronously. When the box cover is opened, the placement plate and the lifting frame rise simultaneously. The plastic pipe clamped by the pressure testing clamp and filled with water can be pre-placed on the lifting frame, so that the plastic pipe rises with the lifting frame. The plastic pipe on the lifting frame can be directly pushed onto the placement plate, or the plastic pipe that has been detected on the placement plate can be pushed onto the lifting frame. As the box cover descends to close the constant temperature water tank, the lifting frame and the placement plate drive the detected or to-be-detected plastic pipe to descend, reducing the manual lifting of the plastic pipe, thereby reducing the labor intensity of the testing personnel.

[0016] 2. In the present invention, the pressure testing clamps at both ends of the plastic pipe can be clamped by the relative movement of the two clamping plates to ensure the stability of the plastic pipe, reduce its movement during pressure testing. At the same time, the clamping plate presses the pressure testing clamp, improving the sealing between the pressure testing clamp and the plastic pipe, and reducing the inaccurate detection results caused by insufficient sealing between the pressure testing clamp and the plastic pipe.

[0017] 3. In the present invention, the pressure testing pipeline is limited by the wire management ring. The pressure testing pipeline is placed inside the pipeline hole, limited by the wire clamping frame, and the sealing between the pressure testing pipeline and the pipeline hole is ensured by the sealing ring, thereby avoiding the damage to the pressure testing pipeline caused by the descent of the box cover, and avoiding the influence on the detection results caused by the temperature and pressure changes in the gap between the box cover and the constant temperature water tank.

[0018] 4. In the present invention, during the process of the lifting frame ascending and descending, the transfer plate is in an upwardly inclined state under the action of the blocking rod, protecting the side of the lifting frame close to the constant temperature water tank to prevent the plastic pipes from falling. When the lifting frame and the placement plate rise to a height higher than the constant temperature water tank, the transfer plate loses the block of the blocking rod and rotates to a horizontal state to contact the placement plate, and the plastic pipes can be pushed between the lifting frame and the placement plate through the transfer plate.

[0019] 5. Therefore, compared with the plastic pipe stable mechanical stress test device in the prior art, in the present invention, the box cover is set to be opened and closed in a lifting mode, and at the same time, the placement plate and the lifting frame are driven to move synchronously by the box cover. The plastic pipes can be pre-placed on the lifting frame at the bottom position. When the placement plate and the lifting frame rise above the constant temperature water tank, the transfer plate rotates to a horizontal state, and the plastic pipes can be pushed onto the placement plate. The pressure clamping parts on both sides of the plastic pipes are clamped by the clamping plates, and the pressure pipeline can be placed inside the pipeline hole and limited by the wire clamping frame. The box cover drives the placement plate and the plastic pipes to descend, the box cover closes the constant temperature water tank, and the pressure test of the plastic pipes can be carried out through the pressure testing equipment. After the pressure test is completed, the box cover drives the lifting frame and the placement plate to rise, moves the tested plastic pipes back to the lifting frame and drives the lifting frame to descend by the box cover, reducing the manual lifting work of the plastic pipes. At the same time, the pressure pipeline and the plastic pipes are limited during the detection process to ensure the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0021] Figure 1 It is a schematic structural diagram of the first perspective of the closed state of the box cover of the present invention; Figure 2 It is a schematic structural diagram of the second perspective of the closed state of the box cover of the present invention; Figure 3 It is a schematic structural diagram of the first perspective of the opened state of the box cover of the present invention; Figure 4 It is a schematic structural diagram of the second perspective of the opened state of the box cover of the present invention; Figure 5 It is a schematic structural diagram of the lifting frame and the transfer assembly of the present invention; Figure 6 It is a schematic structural diagram of the placement plate and the clamping mechanism of the present invention; Figure 7 It is a schematic structural diagram of the constant temperature water tank and the wire clamping assembly of the present invention; Figure 8 For the present invention Figure 3 The partial enlarged structural diagram at A in; Figure 9 For the present invention Figure 7Schematic diagram of the partially enlarged structure at position B in the [Chinese context].

[0022] In the figure: 1. Constant temperature water tank; 2. Tank cover; 3. Lifting frame; 4. Placement plate; 5. Electric cylinder; 6. Sealing gasket; 7. Placement groove; 8. Sealing ring; 9. Cable management ring; 101. Limit rod; 102. Limit seat; 201. Transfer plate; 202. Stop rod; 203. First limit block; 204. Second limit block; 301. Support frame; 302. Clamping plate; 303. Bi-directional screw; 304. Motor; 305. Slide bar; 401. Cable clamping frame; 402. Clamping block; 403. Compression spring. Detailed implementation method

[0023] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0024] As Figures 1 to 9 shown, this embodiment proposes a stable mechanical stress testing device for plastic pipes, including a constant temperature water tank 1, and also including a tank cover 2, a lifting frame 3, a placement plate 4, and a clamping mechanism. Compared with the plastic pipe stable mechanical stress testing device in the prior art, in the present invention, the tank cover 2 is set in a lifting and opening / closing mode, and at the same time, the placement plate 4 and the lifting frame 3 are driven by the tank cover 2 to move synchronously. The plastic pipe can be pre-placed on the lifting frame 3 at the bottom position. When the placement plate 4 and the lifting frame 3 rise above the constant temperature water tank 1, the transfer plate 201 rotates to a horizontal state, and the plastic pipe can be pushed onto the placement plate 4. The clamping plate 302 clamps the pressure application clamping parts on both sides of the plastic pipe, and the pressure application pipeline can be placed inside the pipeline hole and limited by the cable clamping frame 401. The tank cover 2 drives the placement plate 4 and the plastic pipe to descend, and the tank cover 2 closes the constant temperature water tank 1. Then, the pressure testing of the plastic pipe can be carried out through the pressure testing equipment. After the pressure testing is completed, the tank cover 2 drives the lifting frame 3 and the placement plate 4 to rise, moves the tested plastic pipe back to the lifting frame 3, and drives the lifting frame 3 to descend by the tank cover 2, reducing the manual lifting work of the plastic pipe. At the same time, during the detection process, the pressure application pipeline and the plastic pipe are limited to ensure the accuracy of the detection results.

[0025] The lid 2 is arranged to be liftable on the top of the constant temperature water tank 1. An electric cylinder 5 is installed on the constant temperature water tank 1. The lid 2 is fixedly connected to the output end of the electric cylinder 5. The electric cylinder 5 can drive the lid 2 to lift vertically to open and close the constant temperature water tank 1. A sealing gasket 6 is fixedly connected to the bottom end of the lid 2. The sealing gasket 6 and the constant temperature water tank 1 are in sealed sliding fit. The gap between the lid 2 and the constant temperature water tank 1 is closed by the sealing gasket 6 to ensure the sealing performance of the constant temperature water tank 1. The lifting frame 3 is fixedly connected to the lid 2 and lifts with the lid 2 for lifting the plastic pipe. To reduce the shaking of the plastic pipe on the lifting frame 3, a placing groove 7 is formed at the top end of the lifting frame 3 for placing the plastic pipe to be detected. Placing the plastic pipe with the pressing and testing part clamped and filled with water in the placing groove 7 can reduce the shaking of the plastic pipe. Driving the lid 2 to rise by the electric cylinder 5 can drive the lifting frame 3 to rise accordingly. When the constant temperature water tank 1 is opened, the lifting frame 3 drives the plastic pipe to rise, and the plastic pipe can be transferred into the constant temperature water tank 1. The placing plate 4 is fixedly connected to the bottom end of the lid 2 for placing the plastic pipe to be detected. A plurality of water passing holes are formed in the placing plate 4 to allow the constant temperature water to pass through. When the lid 2 rises to open the constant temperature water tank 1, the placing plate 4 is driven to rise at the same time. The height of the placing plate 4 is adapted to that of the lifting frame 3. After the lid 2 drives the lifting frame 3 and the placing plate 4 to rise above the constant temperature water tank 1, the plastic pipe can be transferred between the lifting frame 3 and the placing plate 4. To ensure the stability of the lifting of the lid 2, a limiting member is further included. The limiting member is used to limit the lid 2. The limiting member includes a limiting rod 101 and a limiting seat 102. The limiting rod 101 is fixedly connected to the bottom end of the lid 2. The limiting seat 102 is fixedly connected to the constant temperature water tank 1. The limiting rod 101 and the limiting seat 102 are in sliding fit. When the lid 2 lifts, the lid 2 can be limited by the sliding fit between the limiting rod 101 and the limiting seat 102 to ensure the stability of the lid 2 during lifting.

[0026] To facilitate the movement of the plastic pipes on the lifting frame 3 to the placement plate 4, a transfer assembly is further included. The transfer assembly includes a transfer plate 201, a stop bar 202, and a first limiting block 203. The transfer plate 201 is rotatably connected to one end of the lifting frame 3 close to the constant temperature water tank 1. The stop bar 202 is fixedly connected to one side of the constant temperature water tank 1 close to the lifting frame 3. One end of the transfer plate 201 away from the lifting frame 3 contacts the stop bar 202. The first limiting block 203 is fixedly connected to the lifting frame 3. When the lifting frame 3 rises to the highest position, the transfer plate 201 rotates to the horizontal position and contacts the first limiting block 203. At this time, the transfer plate 201 contacts the placement plate 4. To prevent the transfer plate 201 from rotating forward above the lifting frame 3, a second limiting block 204 is fixedly connected to the lifting frame 3 to prevent the transfer plate 201 from rotating to the front side of the lifting frame 3. When the electric cylinder 5 drives the box cover 2, the lifting frame 3, and the placement plate 4 to rise, the stop bar 202 limits the transfer plate 201, so that the transfer plate 201 is always in an upwardly inclined position and contacts the stop bar 202. When the transfer plate 201 rises above the constant temperature water tank 1, the transfer plate 201 loses the block of the stop bar 202 and gradually rotates downward under the action of gravity and finally rotates to the horizontal state. Since the height of the placement plate 4 is flush with that of the lifting frame 3, when the transfer plate 201 rotates to the horizontal state, the top height of the transfer plate 201 is flush with the top heights of the lifting frame 3 and the placement plate 4, which can assist in pushing the plastic pipes between the lifting frame 3 and the placement plate 4. When the electric cylinder 5 drives the box cover 2, the placement plate 4, and the lifting frame 3 to descend, the placement plate 4 drives the plastic pipes into the interior of the constant temperature water tank 1, and the box cover 2 closes the top of the constant temperature water tank 1. The transfer plate 201 descends with the lifting frame 3. The bottom of the transfer plate 201 contacts and is blocked by the end of the constant temperature water tank 1 close to the lifting frame 3 and the stop bar 202 and rotates upward. The transfer plate 201 contacts the stop bar 202, is upwardly inclined, and descends with the lifting frame 3 close to the ground. During the lifting and lowering process of the lifting frame 3, the transfer plate 201 protects the end of the lifting frame 3 close to the constant temperature water tank 1 to prevent the plastic pipes from falling off the lifting frame 3.

[0027] The clamping mechanism is arranged on the placing plate 4 and is used to clamp the pressure test clamps at both ends of the plastic pipe. The clamping mechanism includes a support frame 301 and a clamping plate 302. There are multiple support frames 301. The placing plate 4 is fixedly connected to the bottom end of the box cover 2 through the support frame 301. The clamping plate 302 is movably arranged between two adjacent support frames 301. There are multiple groups of clamping plates 302, and the number of each group of clamping plates 302 is two. The two clamping plates 302 move relatively to clamp the pressure test clamps at both ends of the plastic pipe. A plurality of bidirectional screws 303 are rotatably connected between two adjacent support frames 301. A plurality of motors 304 are installed on the support frame 301. The bidirectional screws 303 and the motors 304 are in one-to-one correspondence. The bidirectional screw 303 is fixedly connected to the output end of the motor 304. Multiple groups of clamping plates 302 and multiple bidirectional screws 303 are in one-to-one correspondence. Threaded holes matching the bidirectional screws 303 are formed in the clamping plates 302. The two clamping plates 302 are symmetrically arranged on the bidirectional screw 303. A sliding rod 305 is fixedly connected between two adjacent support frames 301. The clamping plate 302 is in sliding fit with the sliding rod 305. By driving the bidirectional screw 303 to rotate through the motor 304, the two clamping plates 302 can be driven to approach or move away from each other. The plastic pipe to be detected is placed between the two clamping plates 302. The clamping plate 302 is in close contact with the surface of the pressure test clamp. The two clamping plates 302 clamp the plastic pipe to ensure its stability. At the same time, the clamping plate 302 applies force to the pressure test clamp, further improving the sealing performance between the pressure test clamp and the plastic pipe and reducing the influence of leakage caused by the pressure test clamp on the test result. Through holes for the pressure test pipeline to pass through are formed in the clamping plate 302 to prevent damage to the pressure test pipeline during the clamping process.

[0028] To reduce the influence of the pressure test pipeline on the sealing of the constant temperature water tank 1, pipeline holes for the pressure test pipeline to pass through are formed in both the constant temperature water tank 1 and the box cover 2. A sealing ring 8 is fixedly connected inside the pipeline hole. The sealing ring 8 is made of an elastic material and can close the pipeline hole when the pipeline hole is in an empty state. When the pressure test pipeline is placed inside the pipeline hole, the sealing ring 8 can be deformed to wrap the pressure test pipeline. When the box cover 2 descends to close the constant temperature water tank 1, the pressure test pipeline can be restricted inside the pipeline hole. At the same time, the sealing ring 8 seals the pipeline hole, preventing the box cover 2 from squeezing the pressure test pipeline when it descends and avoiding gaps between the box cover 2 and the constant temperature water tank 1 caused by the pressure test pipeline, ensuring the sealing performance of the constant temperature water tank 1, so that the temperature and pressure inside the constant temperature water tank 1 are in a relatively stable state and the test accuracy is guaranteed.

[0029] To limit the pressure pipeline inside the pipeline hole, it further includes a wire clamping assembly. The wire clamping assembly is used to limit the pressure pipeline inside the pipeline hole. The wire clamping assembly includes a wire clamping frame 401 and a clamping member. The wire clamping frame 401 is in a U shape. There is a wire clamping groove on the constant temperature water tank 1 that matches the wire clamping frame 401. The clamping member is arranged on the constant temperature water tank 1 and is used to clamp the wire clamping frame 401. The clamping member includes a clamping block 402. There is a clamping groove on the constant temperature water tank 1. The clamping block 402 is connected inside the clamping groove through a compression spring 403. The clamping groove communicates with the wire clamping groove. There is a clamping hole on the wire clamping frame 401 that matches the clamping block 402. After placing the pressure pipeline inside the pipeline hole of the constant temperature water tank 1, install the wire clamping frame 401 into the inside of the wire clamping groove. The clamping block 402 is spherical. When the wire clamping frame 401 enters the wire clamping groove and contacts the clamping block 402, the clamping block 402 can be pushed into the inside of the clamping groove to compress the compression spring 403. After the wire clamping frame 401 is installed into the inside of the wire clamping groove, the clamping hole drops to correspond to the position of the clamping block 402. Under the action of the compression spring 403, the clamping block 402 is pushed into the inside of the clamping hole to limit the wire clamping frame 401 to a certain extent. At the same time, there is a certain sliding damping between the wire clamping frame 401 and the wire clamping groove, restricting the pressure pipeline inside the pipeline hole. There is a groove on the box cover 2 that matches the wire clamping frame 401 to prevent the wire clamping frame 401 from hindering the descent of the box cover 2. After the detection is completed, when removing the plastic pipe from the placement plate 4, pull the wire clamping frame 401 to remove it from the inside of the wire clamping groove to release the restriction on the pressure pipeline, and the pressure pipeline can be removed from the inside of the pipeline hole.

[0030] To further reduce the shaking of the pressure pipeline, it further includes a wire arranging ring 9. The wire arranging ring 9 is fixedly connected to the clamping plate 302. There is an opening on the wire arranging ring 9 for clamping the pressure pipeline. Clamping the pressure pipeline into the inside of the wire arranging ring 9 can limit the pressure pipeline and reduce the influence of the shaking of the pressure pipeline during the detection process on the detection result.

[0031] The working principle or usage process of this stable mechanical stress testing device for plastic pipes is as follows: Clamp the pressure clamping parts at both ends of the plastic pipe to be detected and fill the inside of the plastic pipe with water. Then connect the plastic pipe with the pressure clamping parts installed and filled with water to the pressure pipeline and place it on the placement groove 7 of the lifting frame 3. Initially, the box cover 2 is at the bottom to seal the constant temperature water tank 1. The electric cylinder 5 drives the box cover 2 to rise to open the constant temperature water tank 1. The box cover 2 drives the placement plate 4 and the lifting frame 3 to rise synchronously, driving the plastic pipe to rise. The end of the transfer plate 201 contacts the stop rod 202 and is in an inclined state to protect the side of the lifting frame 3 close to the constant temperature water tank 1. When the lifting frame 3 and the placement plate 4 rise above the constant temperature water tank 1, the transfer plate 201 rotates to a horizontal state and is flush with the placement plate 4 and the lifting frame 3, and pushes the plastic pipe on the lifting frame 3 to the placement plate 4 through the transfer plate 201. Move the plastic pipe to between the corresponding two clamping plates 302. The motor 304 drives the bidirectional screw 303 to rotate, so that the two clamping plates 302 approach each other to clamp the pressure application fasteners at both ends of the plastic pipe. Insert the pressure application pipeline into the wire management ring 9 and then place it inside the pipeline hole. Install the wire clamping frame 401 inside the wire clamping groove to limit the pressure application pipeline, and reserve the length for the pressure application pipeline to descend with the plastic pipe. The electric cylinder 5 drives the box cover 2 to descend, thereby causing the placement plate 4 and the lifting frame 3 to descend. The placement plate 4 drives the plastic pipe to descend into the constant temperature water inside the constant temperature water tank 1, and the plastic pipe can be subjected to pressure detection through the pressure application device and the pressure application pipeline. After the detection is completed, the electric cylinder 5 drives the box cover 2, the placement plate 4 and the lifting frame 3 to rise. The placement plate 4 and the lifting frame 3 rise above the constant temperature water tank 1. The transfer plate 201 rotates to a horizontal state, and the detected plastic pipe is pushed onto the lifting frame 3. The pressure application pipeline is removed from inside the wire management ring 9 and the pipeline hole. Then the electric cylinder 5 drives the box cover 2, the placement plate 4 and the lifting frame 3 to descend, removes the plastic pipe from the lifting frame 3, and places the new plastic pipe to be detected on the lifting frame 3 for subsequent detection. The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A stable mechanical stress test device for plastic pipe materials, comprising a constant temperature water tank (1), characterized in that, Also includes: A tank cover (2), the tank cover (2) being liftable and arranged on the top of the constant temperature water tank (1); A lifting frame (3), the lifting frame (3) is fixedly connected to the box cover (2) and is raised and lowered along with the box cover (2), and is used to lift the plastic pipe; A placement plate (4), the placement plate (4) being fixedly connected to the bottom end of the box cover (2) and used for placing the plastic pipe to be tested; A clamping mechanism, the clamping mechanism is arranged on the placement plate (4) and is used to clamp the pressing clamps at both ends of the plastic pipe, the clamping mechanism comprising: A support frame (301), wherein a plurality of the support frames (301) are provided, and the placement plate (4) is fixedly connected to the bottom end of the box cover (2) via the support frame (301); A clamping plate (302) is movably arranged between two adjacent support frames (301). The clamping plates (302) are arranged in multiple groups, and each group of the clamping plates (302) has two clamping plates (302). The two clamping plates (302) move relative to each other to clamp the pressing clamps at both ends of the plastic pipe.

2. The stable mechanical stress testing device for plastic pipes according to claim 1, wherein The thermostatic water tank (1) and the tank cover (2) are both provided with pipeline holes for the pressure-pressurizing pipeline to pass through, and a sealing ring (8) is fixedly connected to the interior of the pipeline hole.

3. The stable mechanical stress testing device for plastic pipes according to claim 2, wherein, It also includes a wire clamping assembly, which is used to limit the pressure pipeline in the pipeline hole, and the wire clamping assembly includes: A wire clamping frame (401), the wire clamping frame (401) is in a convex shape, and a wire clamping groove matching the wire clamping frame (401) is provided on the thermostatic water tank (1); A clamping piece, the clamping piece is arranged on the constant temperature water tank (1), and the clamping piece is used to clamp the wire clamping frame (401).

4. A stable mechanical stress testing device for plastic pipes according to claim 3, characterized in that, The clamping member comprises: A clamping block (402), a clamping slot is provided on the thermostatic water tank (1), the clamping block (402) is connected to the inside of the clamping slot via a compression spring (403), the clamping slot is communicated with the wire clamping slot, and a clamping hole matching the clamping block (402) is provided on the wire clamping frame (401).

5. The stable mechanical stress testing device for plastic pipe according to claim 4, characterized in that, It also includes a limiting member, which is used to limit the position of the box cover (2), and the limiting member includes: A limiting rod (101), wherein the limiting rod (101) is fixedly connected to the bottom end of the box cover (2); A limit seat (102), wherein the limit seat (102) is fixedly connected to the constant temperature water tank (1), and the limit rod (101) and the limit seat (102) are in sliding cooperation.

6. The stable mechanical stress testing device for plastic pipes according to claim 5, wherein Also included is a transfer assembly, the transfer assembly comprising: A transfer plate (201), the transfer plate (201) being rotatably connected to one end of the lifting frame (3) close to the constant temperature water tank (1); a blocking rod (202), the blocking rod (202) being fixedly connected to a side of the thermostatic water tank (1) close to the lifting frame (3), and an end of the transfer plate (201) away from the lifting frame (3) being in contact with the blocking rod (202); The first limit block (203), the first limit block (203) is fixedly connected to the lifting frame (3), the transfer plate (201) rotates to a horizontal position and contacts the first limit block (203) when the lifting frame (3) rises to the highest position, and at this time the transfer plate (201) contacts the placement plate (4).

7. A stable mechanical stress testing device for plastic pipes according to claim 6, characterized in that, The second limit block (204) is fixedly connected to the lifting frame (3) to prevent the transfer plate (201) from rotating forward to the lifting frame (3).

8. The stable mechanical stress testing device for plastic pipe according to claim 7, characterized in that, A placement groove (7) is formed at the top of the lifting frame (3) for placing the plastic pipe to be detected.

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