A corrugated pipe pressure resistance detection device

Abstract

The application relates to the technical field of corrugated pipe performance detection, in particular to a corrugated pipe pressure resistance detection device, which comprises a placing plate, an upper mounting plate and a lower mounting plate are slidably connected to the placing plate, the upper mounting plate and the lower mounting plate are driven by a first driving mechanism and can realize opposite or opposite moving in the vertical direction, the lower end surface of the upper mounting plate is transversely slidably connected with a first sliding plate, the lower end surface of the first sliding plate and the upper end surface of the lower mounting plate are both provided with clamping mechanisms, the upper mounting plate is rotationally connected with a first lead screw, and a lead screw nut matched with the first lead screw is fixedly arranged on the first sliding plate. The application can simulate the bending working condition of the corrugated pipe in actual use, comprehensively and accurately detect the pressure resistance performance by applying axial pressure and internal pressure, combine stable clamping and sealing structures, improve detection reliability, and guarantee safe use of products.

Description

Technical Field

[0001] This application relates to the technical field of corrugated pipe performance testing, and in particular to a corrugated pipe pressure resistance testing device. Background Technology

[0002] In the corrugated pipe manufacturing industry, pressure resistance testing is typically conducted using methods for straight pipes. However, in practical applications, corrugated pipes are often in a bent state, and existing testing equipment cannot simulate this condition. This results in test results that do not accurately reflect the actual pressure resistance of the corrugated pipe, posing a potential safety hazard. For example, in building drainage and municipal engineering scenarios, corrugated pipes need to be installed in a bent configuration according to the actual wiring. In this case, their pressure resistance differs significantly from that of straight pipes, and relying solely on test results from the straight pipe configuration is insufficient to guarantee their safety and reliability in actual use.

[0003] A search revealed Chinese Patent Publication No. CN221006701U, which discloses a pressure ring bellows testing device. The device includes a pressure testing platform with legs at its bottom, a hydraulic pump station, and a testing cylinder. The hydraulic pump station is located below the pressure testing platform. The cylindrical wall of the testing cylinder is connected to the upper surface of the pressure testing platform. Multiple bolt holes, corresponding one-to-one with mounting holes of the pressure ring bellows, are evenly distributed along the circumference of one end face of the testing cylinder. An oil hole is formed on the end face of the testing cylinder with the bolt holes. A fixing pipe is installed on the cylindrical wall of the testing cylinder, and the fixing pipe communicates with the oil hole. One end of the fixing pipe is connected to the oil outlet of the hydraulic pump station, and the other end is connected to a pressure gauge, which is mounted on the pressure testing platform.

[0004] Regarding the aforementioned related technologies, the inventors discovered the following drawbacks: existing technologies cannot simulate the bending condition of bellows, leading to a decrease in the reliability of test results. To address this technical problem, this application proposes a method that uses a first sliding plate that can slide laterally to adjust the degree of bellows bending, a clamping mechanism to fix the bellows, and a combination of axial pressure application and an internal pressurization structure. This enables the testing of the pressure resistance of bellows under bending conditions, achieving the technical effect of improving the reliability of test results and ensuring the safety and reliability of the product in actual use. Utility Model Content

[0005] To simulate the bending conditions of a bellows and thus improve the accuracy of testing, this application provides a bellows pressure resistance testing device.

[0006] This application provides a bellows pressure resistance testing device, employing the following technical solution: It includes a placement plate, on which an upper mounting plate and a lower mounting plate are slidably connected. The upper and lower mounting plates are driven by a first driving mechanism, enabling them to move vertically towards or away from each other. A first sliding plate is slidably connected laterally to the lower end face of the upper mounting plate. Clamping mechanisms are provided on the lower end face of the first sliding plate and the upper end face of the lower mounting plate. A first lead screw is rotatably connected to the upper mounting plate, and a lead screw nut adapted to the first lead screw is fixedly mounted on the first sliding plate. By applying axial pressure and internal pressurization, combined with a stable clamping and sealing structure, the device comprehensively and accurately tests the pressure resistance performance, improving testing reliability to ensure safe product use.

[0007] Optionally, the clamping mechanism includes a second bidirectional lead screw respectively disposed on the first sliding plate and the lower mounting plate, the second bidirectional lead screw being rotatably connected to the corresponding first sliding plate or lower mounting plate; the two ends of the second bidirectional lead screw are respectively provided with first threaded portions with opposite rotation directions.

[0008] Optionally, two first arc-shaped clamping parts are slidably connected to the first sliding plate, and each first arc-shaped clamping part is provided with a first nut that is adapted to the corresponding side first threaded part of the second bidirectional lead screw.

[0009] Optionally, the lower mounting plate is slidably connected to two second arc-shaped clamping parts, each of which is provided with a second nut that is adapted to the corresponding side of the first threaded part of the second bidirectional lead screw.

[0010] Optionally, a first cylinder is fixedly provided on the lower end face of the first sliding plate and the upper end face of the lower mounting plate, and a rubber pad is sleeved on the outer wall of each first cylinder.

[0011] Optionally, the lower mounting plate is provided with a lower water passage hole communicating with the corresponding inner cavity of the first cylinder, and a lower water delivery pipe communicating with the lower water passage hole is fixedly provided on the lower end face of the lower mounting plate. The lower water delivery pipe is connected to an external booster pump through a pipeline.

[0012] Optionally, the first sliding plate is provided with an upper water passage hole communicating with the corresponding inner cavity of the first cylinder, and an upper water supply pipe communicating with the upper water passage hole is fixedly provided on the upper end face of the first sliding plate, and a valve is provided on the upper water supply pipe.

[0013] Optionally, the upper mounting plate is provided with a through hole for the upper water supply pipe to pass through.

[0014] Optionally, the placement plate is provided with a first sliding groove, and a third bidirectional lead screw is rotatably connected in the first sliding groove; the two ends of the third bidirectional lead screw are respectively provided with second threaded portions with opposite rotation directions.

[0015] Optionally, both the upper mounting plate and the lower mounting plate are provided with a first sliding block that is adapted to the first sliding groove, and each first sliding block is provided with a thread that is adapted to the second threaded part on the corresponding side.

[0016] In summary, this application includes the following beneficial technical effects: 1. This utility model can simulate the bending conditions of corrugated pipes in actual applications to conduct pressure resistance tests, which solves the problem that the existing technology can only test in the straight pipe state, resulting in the results not being able to accurately reflect the actual pressure resistance performance. This improves the reliability of the test results and helps to ensure the safety and reliability of the product in actual use.

[0017] 2. This utility model has dual detection functions of applying axial pressure and internal pressure to the bellows, and achieves stable fixation and sealing of the bellows through the clamping mechanism, the first cylinder and the rubber pad, etc. It can comprehensively detect the pressure resistance performance of the bellows under different pressure conditions, thus improving the comprehensiveness and accuracy of the detection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application; Figure 2 This is a partial structural diagram of the upper part in an embodiment of this application; Figure 3 This is a partial structural diagram of the middle part of the embodiment of this application; Figure 4 This is a structural schematic diagram viewed from below in an embodiment of this application.

[0019] Reference numerals: 1. Placement plate; 2. Upper mounting plate; 3. Lower mounting plate; 4. First sliding plate; 5. First lead screw; 6. First sliding groove; 7. Third double-acting lead screw; 8. First sliding block; 9. Second double-acting lead screw; 10. First arc-shaped clamping part; 11. First nut; 12. Second arc-shaped clamping part; 13. Second nut; 14. First cylinder; 15. Rubber pad; 16. Lower water passage hole; 17. Lower water supply pipe; 18. Upper water passage hole; 19. Upper water supply pipe; 20. Valve; 21. Through hole. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1-4 This application will be further described in detail below. The technical solutions in the embodiments of this application will be clearly described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0021] This application discloses a device for testing the pressure resistance of bellows. For example... Figure 1 As shown, the bellows pressure resistance testing device of this application includes a placement plate 1, which serves as the basic load-bearing component of the device to ensure structural stability during the testing process. An upper mounting plate 2 and a lower mounting plate 3 are slidably connected to the placement plate 1. The two are distributed in the vertical direction and can move towards or away from each other under the drive of the first driving mechanism to apply axial pressure to the bellows.

[0022] The lower end face of the upper mounting plate 2 is slidably connected to a first sliding plate 4, which can be adjusted in the horizontal direction (lateral direction). The lower end face of the first sliding plate 4 and the upper end face of the lower mounting plate 3 are both provided with clamping mechanisms for fixing the two ends of the bellows. The upper mounting plate 2 is also rotatably connected to a first lead screw 5, which extends laterally and is adapted to the first nut 11 provided on the first sliding plate 4. By rotating the first lead screw 5, the first sliding plate 4 can be driven to slide laterally, thereby adjusting the degree of bending of the bellows.

[0023] The placement plate 1 has a first sliding groove 6 extending vertically, and a third bidirectional lead screw 7 is rotatably connected in the first sliding groove 6 through a bearing; the two ends of the third bidirectional lead screw 7 are respectively provided with second threaded parts with opposite rotation directions (i.e., one side is a left-hand thread and the other side is a right-hand thread).

[0024] Both the upper mounting plate 2 and the lower mounting plate 3 have a first sliding block 8 that is adapted to the first sliding groove 6 fixed on the side near the placement plate 1. The two first sliding blocks 8 are respectively sleeved on both ends of the third bidirectional screw 7, and their inner walls are provided with internal threads that are adapted to the second threaded part on the corresponding side. When the third bidirectional screw 7 rotates, the two first sliding blocks 8 will move towards or away from each other along the first sliding groove 6, thereby driving the upper mounting plate 2 and the lower mounting plate 3 to move closer or further away in the vertical direction, thus completing the application of axial pressure to the bellows.

[0025] The clamping mechanism includes a second bidirectional lead screw 9 respectively disposed on the first sliding plate 4 and the lower mounting plate 3. The second bidirectional lead screw 9 is rotatably connected to the corresponding first sliding plate 4 or lower mounting plate 3 through bearings, and its two ends are respectively provided with first threaded portions with opposite rotation directions (one side is a left-hand thread and the other side is a right-hand thread). The lower end face of the first sliding plate 4 is slidably connected to two first arc-shaped clamping parts 10. The opposite surfaces of the two first arc-shaped clamping parts 10 are arc-shaped structures adapted to the outer wall of the bellows. Each first arc-shaped clamping part 10 is fixed with a first nut 11. The two first nuts 11 are respectively sleeved on the first threaded parts at both ends of the second bidirectional lead screw 9 and are adapted to the corresponding threaded parts. When the second bidirectional lead screw 9 is rotated, the two first arc-shaped clamping parts 10 will move towards each other in the lateral direction to achieve clamping and fixing of the upper end of the bellows. Two second arc-shaped clamping parts 12 are slidably connected to the upper end face of the lower mounting plate 3. Their structure is the same as that of the first arc-shaped clamping part 10. Each second arc-shaped clamping part 12 is fixed with a second nut 13. The two second nuts 13 are respectively sleeved on the first threaded parts at both ends of the corresponding second bidirectional lead screw 9 and are adapted to the corresponding threaded parts. Similarly, when the second bidirectional lead screw 9 on the lower mounting plate 3 is rotated, the two second arc-shaped clamping parts 12 will move towards each other to complete the clamping and fixing of the lower end of the bellows.

[0026] To simulate the internal pressure conditions of the corrugated pipe in actual use, this device is also equipped with a water injection and pressurization structure. The lower end face of the first sliding plate 4 and the upper end face of the lower mounting plate 3 are both fixed with a first cylinder 14. The inner diameter of the first cylinder 14 is adapted to the inner diameter of the corrugated pipe and is used to insert into both ends of the corrugated pipe to form a sealed cavity. Each first cylinder 14 is fitted with a rubber pad 15 on its outer wall. The rubber pad 15 can fit tightly against the inner wall of the corrugated pipe when the clamping mechanism is tightened, thereby enhancing the sealing performance. The lower mounting plate 3 has a lower water passage hole 16 that communicates with the inner cavity of the first cylinder 14 below. The lower end face of the lower mounting plate 3 is fixed with a lower water supply pipe 17 that communicates with the lower water passage hole 16. The lower water supply pipe 17 is connected to an external booster pump (not shown in the figure) through a pipe. The booster pump can pump water or other media into the corrugated pipe through the lower water supply pipe 17 and the lower water passage hole 16 to achieve internal pressurization. The first sliding plate 4 has an upper water passage hole 18 that communicates with the inner cavity of the upper first cylinder 14. The upper end face of the first sliding plate 4 is fixed with an upper water supply pipe 19 that communicates with the upper water passage hole 18. A valve 20 is provided on the upper water supply pipe 19. The valve 20 can control the discharge of the medium inside the bellows or maintain the pressure. The upper mounting plate 2 has a through hole 21 for the upper water supply pipe 19 to pass through, so as to avoid interference with the upper water supply pipe 19 when the upper mounting plate 2 moves vertically.

[0027] Working principle: Place the corrugated pipe: Place both ends of the corrugated pipe to be tested onto the first cylinder 14 of the lower mounting plate 3 and the first cylinder 14 of the first sliding plate 4 respectively, ensuring that the rubber pad 15 is in contact with the inner wall of the corrugated pipe; Fixing the bellows: Rotate the first sliding plate 4 and the second bidirectional lead screw 9 on the lower mounting plate 3 respectively, so that the first arc-shaped clamping part 10 and the second arc-shaped clamping part 12 move towards each other, and clamp and fix the two ends of the bellows. Adjusting the bending condition: Rotate the first lead screw 5 to drive the first sliding plate 4 to slide laterally, causing the upper clamping mechanism and the lower clamping mechanism to be misaligned laterally, thereby bending the bellows and simulating the bending condition in actual use (the misalignment distance can be adjusted according to the detection requirements). Apply axial pressure: Start the first drive mechanism (drive the third bidirectional lead screw 7 to rotate), so that the upper mounting plate 2 and the lower mounting plate 3 move towards each other, and apply axial pressure to the bellows. The pressure can be monitored by a pressure sensor (which can be installed on the clamping mechanism). Internal pressure test: Start the booster pump and pump the medium into the bellows through the lower water supply pipe 17. Open valve 20 to release air and then close it. Continue to pressurize to the set value. Combine the axial pressure to monitor the pressure resistance performance of the bellows (such as whether there is cracking or excessive deformation). Test complete: Turn off the booster pump, open valve 20 to release internal pressure, reverse the first drive mechanism and the second bidirectional lead screw 9, and remove the bellows after testing. The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bellows pressure resistance testing device, comprising a placement plate, characterized in that: An upper mounting plate and a lower mounting plate are slidably connected on the placement plate. The upper and lower mounting plates are driven by a first driving mechanism and can move towards or away from each other in the vertical direction. A first sliding plate is slidably connected to the lower end face of the upper mounting plate. A clamping mechanism is provided on the lower end face of the first sliding plate and the upper end face of the lower mounting plate. A first lead screw is rotatably connected to the upper mounting plate, and a lead screw nut adapted to the first lead screw is fixedly provided on the first sliding plate.

2. The bellows pressure resistance testing device according to claim 1, characterized in that: The clamping mechanism includes a second bidirectional lead screw respectively disposed on a first sliding plate and a lower mounting plate, the second bidirectional lead screw being rotatably connected to the corresponding first sliding plate or lower mounting plate; the two ends of the second bidirectional lead screw are respectively provided with first threaded portions with opposite rotation directions.

3. The bellows pressure resistance testing device according to claim 2, characterized in that: The first sliding plate has two first arc-shaped clamping parts slidably connected, and each first arc-shaped clamping part is provided with a first nut that is adapted to the corresponding first threaded part of the second bidirectional lead screw.

4. The bellows pressure resistance testing device according to claim 2, characterized in that: The lower mounting plate is slidably connected to two second arc-shaped clamping parts, and each second arc-shaped clamping part is provided with a second nut that is adapted to the corresponding side first threaded part of the second bidirectional lead screw.

5. The bellows pressure resistance testing device according to claim 1, characterized in that: The lower end face of the first sliding plate and the upper end face of the lower mounting plate are both fixedly provided with a first cylinder, and the outer wall of each first cylinder is fitted with a rubber pad.

6. The bellows pressure resistance testing device according to claim 1, characterized in that: The lower mounting plate has a lower water passage hole that communicates with the inner cavity of the corresponding first cylinder. The lower end face of the lower mounting plate is fixedly provided with a lower water supply pipe that communicates with the lower water passage hole. The lower water supply pipe is connected to an external booster pump through a pipeline.

7. The bellows pressure resistance testing device according to claim 1, characterized in that: The first sliding plate has an upper water passage hole that communicates with the corresponding inner cavity of the first cylinder. An upper water supply pipe that communicates with the upper water passage hole is fixedly installed on the upper end face of the first sliding plate, and a valve is installed on the upper water supply pipe.

8. The bellows pressure resistance testing device according to claim 1, characterized in that: The upper mounting plate has a through hole for the water supply pipe to pass through.

9. The bellows pressure resistance testing device according to claim 1, characterized in that: The placement plate has a first sliding groove, and a third bidirectional lead screw is rotatably connected in the first sliding groove; the two ends of the third bidirectional lead screw are respectively provided with second threaded portions with opposite rotation directions.

10. A bellows pressure resistance testing device according to claim 9, characterized in that: Both the upper and lower mounting plates are provided with first sliding blocks that are adapted to the first sliding groove, and each first sliding block is provided with a thread that is adapted to the second threaded part on the corresponding side.

Images