A bellows wear resistance testing device and testing method

Abstract

The present invention discloses a corrugated pipe wear resistance testing device and method. The device comprises a moving mechanism, a clamping mechanism, prestressed tendons, and a tensioning mechanism. The clamping mechanism is integrally mounted on the moving mechanism and is used to clamp the corrugated pipe splines and abut against the prestressed tendons. The prestressed tendons are tensioned on the tensioning mechanism, with the tensioning direction of the prestressed tendons parallel to the direction of movement of the clamping mechanism on the moving mechanism. The present invention employs a simple automated system to control the movement of the mechanism, thereby achieving precise application of clamping loads, control of friction travel, and time and speed adjustment.

Description

Technical Field

[0001] The invention relates to the technical field of wear resistance testing, in particular to a device and method for testing the wear resistance of a corrugated pipe. Background Art

[0002] Bellows are increasingly used in engineering applications. With the development of technologies to detect damage to components within bellows, their applications are also expanding, making performance testing increasingly important. Prestressed bellows must possess certain rigidity, flexibility, wear resistance, sealing, and adhesion properties. However, wear resistance testing is relatively rare, and no specific testing schemes or methods for bellows wear resistance have been reported. Therefore, it is necessary to develop a wear resistance testing device and method for bellows to address this issue. Summary of the Invention

[0003] The present invention aims to address the aforementioned problems of the prior art by providing a bellows wear resistance testing device and method. This invention employs a simple automated system to control the movement of the mechanism, thereby enabling precise application of clamping load, control of friction stroke, and adjustment of time and speed. This ensures that testing requirements are met, thereby enabling wear resistance testing of bellows.

[0004] In order to achieve the above-mentioned purpose of the invention, the present invention provides a corrugated pipe wear resistance testing device, which is implemented by the following technical scheme: a corrugated pipe wear resistance testing device, comprising a moving mechanism, a clamping mechanism, a prestressed tendon and a tensioning mechanism; the clamping mechanism is arranged as a whole on the moving mechanism, the clamping mechanism is used to clamp the corrugated pipe spline and abut against the prestressed tendon, the prestressed tendon is tensioned on the tensioning mechanism, and the tensioning direction of the prestressed tendon is parallel to the direction of movement of the clamping mechanism on the moving mechanism.

[0005] Furthermore, the clamping mechanism includes: a connecting plate, a left baffle, a load sensor, a limiting guide rod, a left arc-shaped pressure block, a right arc-shaped pressure block, a right baffle and a constant force mechanism, the bottom ends of the left baffle and the right baffle are vertically fixed on the connecting plate, the limiting guide rod is arranged parallel to the connecting plate, and the two ends are respectively fixed on the left baffle and the right baffle; the left arc-shaped pressure block and the right arc-shaped pressure block are slidably arranged on the limiting guide rod, and the arc-shaped surfaces of the left arc-shaped pressure block and the right arc-shaped pressure block are opposite and abut against the prestressed tendons, and the arc-shaped surfaces are used to clamp the corrugated pipe splines; one end of the load sensor is fixed on the left baffle, and the other end is opposite to the left arc-shaped pressure block; the right arc-shaped pressure block is connected to the constant force mechanism.

[0006] Furthermore, the constant force mechanism includes a flange, a floating joint, a cylinder, a cylinder mounting seat, an air source, an electromagnetic reversing valve a, an electromagnetic reversing valve b, a throttle valve and a controller; one end of the flange is connected to the right arc-shaped pressure block, and the other end is connected to the cylinder through a floating joint. The cylinder is mounted on the cylinder mounting seat, and the cylinder mounting seat is fixed on the connecting plate; the air source is connected in series with the electromagnetic reversing valve a, the electromagnetic reversing valve b, and the throttle valve in sequence, and finally connected to one end of the cylinder; the other end of the cylinder is also connected to the air source through the electromagnetic reversing valve a; the controller is respectively connected to the load sensor, electromagnetic reversing valve a, and electromagnetic reversing valve b.

[0007] Furthermore, it also includes reinforcing ribs, which are arranged on the outer sides of the left baffle and the right baffle, and respectively connect the left baffle, the right baffle and the connecting plate.

[0008] Furthermore, it also includes two or more anti-slip baffles, which are arranged in pairs in parallel on the arc-shaped surfaces of the left arc-shaped pressing block and the right arc-shaped pressing block.

[0009] Furthermore, a groove matching the outer circle of the bellows is formed on the arc surface of the left arc-shaped pressing block or the right arc-shaped pressing block.

[0010] Furthermore, the moving mechanism includes: a coupling, a ball screw, a slider, a motor, a controller, a power supply, a limit switch a and a limit switch b. The motor is connected to the ball screw through a coupling, the slider is threadedly connected to the ball screw, the limit switch a and the limit switch b are arranged at both ends of the ball screw, the power supply is connected to the controller, and the controller is respectively connected to the motor, limit switch a and limit switch b.

[0011] Furthermore, it also includes a ball screw support seat, and the two ends of the ball screw support seat are respectively connected to the two ends of the ball screw.

[0012] Furthermore, it also includes a fixed support plate, and the motor, coupling, limit switch a and limit switch b are all installed on the fixed support plate.

[0013] Furthermore, it also includes a guide rail, which is arranged below the guide rail and is used to support the slider.

[0014] The present invention also discloses a method for performing a wear resistance test using the above-mentioned bellows wear resistance test device, comprising the following steps:

[0015] Step 1: Cut the bellows specimen to be tested from the bellows;

[0016] Step 2: On the corrugated pipe spline to be tested, select the position that contacts the prestressed tendon, mark and record the position, and measure and record the wall thickness and mass of the corrugated pipe spline to be tested at the position;

[0017] Step 3: Install the bellows spline to be tested on the clamping mechanism;

[0018] Step 4: Using the prestressed tendon in the tensioned state as the positioning point, align the inner surface of the bellows spline to be tested on the clamping mechanism with the prestressed tendon;

[0019] Step 5: Start the moving mechanism to make the clamping mechanism installed on the moving mechanism move repeatedly along the tensioning direction of the prestressed tendon;

[0020] Step 6: After the test is completed according to the test time, the moving mechanism stops working, the bellows spline to be tested is removed from the clamping mechanism, the residual wall thickness at the marked position on the bellows spline to be tested is measured and recorded, and the mass of each bellows spline to be tested after the test is measured at the same time;

[0021] Step 7: Evaluate the wear resistance of the corrugated pipe by measuring the pipe wall thickness and mass before and after the test.

[0022] Beneficial effects of the present invention:

[0023] The present invention adopts the method of testing the wear resistance of the inner wall of the bellows by testing the wear of the prestressed tendons. Since in actual working conditions, the prestressed tendons are inserted into the bellows one by one and then tensioned, and the interior of the bellows is grouted after the tensioning is completed, the wear resistance test of the inner wall of the bellows is closer to the actual application conditions of the bellows; the sample used is the spline of the bellows, rather than the sample section of the bellows. The advantage of using the spline is that it is more conducive to the stress of the inner wall of the bellows and the prestressed tendons, especially for large-sized bellows, there is no need to design a large clamp or large equipment, thereby reflecting the strong adaptability of the device of the present invention ... The advantage of using a bellows spline rather than a sample section of the bellows is that when force is applied to the sample section of the bellows, due to the flexibility of the bellows, a certain deformation will occur, and the applied quantitative force is absorbed by the deformation of the bellows and is not fully applied to the test position, which has a certain impact on the measurement results. The present invention adopts a cut bellows spline, which not only solves the influence of the bellows deformation on the test, but also makes the applied quantitative force fully act on the prestressed tendons and the bellows spline to be tested. Combined with the use of automated control, the clamping force between the prestressed tendons and the bellows spline to be tested is kept constant, making the test results more precise and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a bellows wear resistance testing device according to the present invention;

[0025] Figure 2 This is a schematic diagram of the moving mechanism of a bellows wear resistance testing device according to the present invention;

[0026] Figure 3This is a schematic diagram of a clamping mechanism of a bellows wear resistance testing device according to the present invention;

[0027] Figure 4 This is a cross-sectional view of a bellows wear resistance test device according to the present invention, wherein the bellows to be tested is installed on the left arc-shaped pressing block or the right arc-shaped pressing block.

[0028] Figure 5 This is a schematic diagram of the pneumatic connection of the clamping mechanism of the bellows wear resistance testing device of the present invention;

[0029] Figure 6 This is a schematic diagram of the pneumatic control of the clamping mechanism of the bellows wear resistance testing device according to the present invention;

[0030] In the figure, 1-moving mechanism; 2-clamping mechanism; 3-prestressed tendon; 11-coupling; 12-ball screw; 15-guide rail; 13-ball screw support seat; 14-fixed support plate; 16-slider; 21-motor; 22-controller; 23-driver; 24-power supply; 25-limit switch a; 26-limit switch b; 31-connecting plate; 32-left baffle; 33-reinforcement rib; 34-load sensor; 35-limit guide rod; 36-left arc-shaped pressure block; 37-anti-slip baffle; 38-bellows spline; 39-right arc-shaped pressure block; 40-right baffle; 41-flange; 42-floating joint; 43-cylinder; 44-cylinder mounting seat; 51-air source; 52-solenoid reversing valve a; 53-solenoid reversing valve b; 54-throttle valve. DETAILED DESCRIPTION

[0031] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following embodiments are described in conjunction with the accompanying drawings.

[0032] Embodiment 1:

[0033] A bellows wear resistance testing device includes a moving mechanism 1, a clamping mechanism 2, a prestressed tendon 3 and a tensioning mechanism (not shown); the clamping mechanism 2 is arranged as a whole on the moving mechanism 1, the clamping mechanism 2 is used to clamp the bellows spline 38 and abut against the prestressed tendon 3, the prestressed tendon 3 is tensioned on the tensioning mechanism, and the tensioning direction of the prestressed tendon 3 is parallel to the direction of movement of the clamping mechanism 2 on the moving mechanism 1.

[0034] The method for testing the wear resistance of bellows using the bellows wear resistance test device is as follows:

[0035] Step 1: Cut the bellows specimen 38 to be tested from the bellows;

[0036] Step 2: On the tested bellows spline 38, select a position that contacts the prestressed tendon 3, mark and record the position, and measure and record the wall thickness and mass of the tested bellows spline 38 at the position;

[0037] Step 3: Install the bellows spline 38 to be tested on the clamping mechanism 2;

[0038] Step 4: Using the prestressed tendon 3 in the tensioned state as the positioning element, align the inner surface of the bellows spline 38 to be tested on the clamping mechanism 2 with the prestressed tendon 3;

[0039] Step 5: Start the moving mechanism 1, so that the clamping mechanism 2 installed on the moving mechanism 1 moves repeatedly along the tensioning direction of the prestressed tendon 3;

[0040] Step 6: After the test is completed according to the test time, the moving mechanism 1 stops working, and the bellows spline 38 to be tested is removed from the clamping mechanism 2. The residual wall thickness at the marked position on the bellows spline 38 to be tested is measured and recorded. At the same time, the mass of each bellows spline 38 to be tested is measured after the test;

[0041] Step 7: Evaluate the wear resistance of the corrugated pipe by measuring the pipe wall thickness and mass before and after the test.

[0042] The sample used in the present invention is a spline of the corrugated pipe rather than a sample section of the corrugated pipe. The advantage of using a spline is that it is more conducive to the stress on the inner wall of the corrugated pipe and the prestressed tendon 3. In particular, for large-sized corrugated pipes, there is no need to design a larger clamp or larger equipment, thereby reflecting the strong adaptability of the device of the present invention.

[0043] Example 2

[0044] On the basis of the above embodiment, the clamping mechanism 2 includes: a connecting plate 31, a left baffle 32, a load sensor 34, a limiting guide rod 35, a left arc-shaped pressure block 36, a right arc-shaped pressure block 39, a right baffle 40 and a constant force mechanism, the bottom end of the left baffle 32 and the bottom end of the right baffle 40 are vertically fixed on the connecting plate 31, the limiting guide rod 35 is arranged parallel to the connecting plate 31, and the two ends are respectively fixed on the left baffle 32 and the right baffle 40; the left arc-shaped pressure block 36 and the right arc-shaped pressure block 39 are slidably arranged on the limiting guide rod 35, and the arc-shaped surfaces of the left arc-shaped pressure block 36 and the right arc-shaped pressure block 39 are opposite and abut against the prestressed tendon 3, and the arc-shaped surface is used to clamp the corrugated pipe spline 38; one end of the load sensor 34 is fixed on the left baffle, and the other end is opposite to the left arc-shaped pressure block 36; the right arc-shaped pressure block 39 is connected to the constant force mechanism.

[0045] Example 3

[0046] On the basis of the above embodiment, the constant force mechanism includes a flange 41, a floating joint 42, a cylinder 43, a cylinder mounting seat 44, an air source 51, an electromagnetic reversing valve a52, an electromagnetic reversing valve b53, a throttle valve 54 and a controller 22; one end of the flange 41 is connected to the right arc-shaped pressure block 39, and the other end is connected to the cylinder 43 through the floating joint 42. The cylinder 43 is mounted on the cylinder mounting seat 44, and the cylinder mounting seat 44 is fixed on the connecting plate 31; the air source 51 is connected in series with the electromagnetic reversing valve a52, the electromagnetic reversing valve b53, and the throttle valve 54 in sequence, and finally communicates with one end of the cylinder 43; the other end of the cylinder 43 is also connected to the air source 51 through the electromagnetic reversing valve a52; the controller 22 is respectively connected to the load sensor 34, the electromagnetic reversing valve a52, and the electromagnetic reversing valve b53.

[0047] Example 4

[0048] Based on the above embodiment, the device further includes reinforcing ribs 33, which are arranged on the outer sides of the left baffle 32 and the right baffle 40 and respectively connect the left baffle 32, the right baffle 40 and the connecting plate 31, thereby increasing the rigidity of the device and improving the stability of the measurement.

[0049] Example 5

[0050] On the basis of the above embodiment, it further comprises two or more anti-slip baffles 37, which are arranged in pairs on the arc surface of the left arc-shaped pressing block 36 and the right arc-shaped pressing block 39 in parallel to fix the bellows spline 38 so that it does not move along the direction of the prestressed tendon 3.

[0051] Example 6

[0052] Based on the above embodiment, the arcuate surface of the left arcuate pressing block 36 or the right arcuate pressing block 39 is provided with a groove adapted to the outer circumference of the bellows 38. This reduces the matching error between the left arcuate pressing block 36 or the right arcuate pressing block 39 and the outer circumference of the bellows 38, thereby improving the stability and accuracy of the measurement.

[0053] Example 7

[0054] Based on the above embodiment, the mobile mechanism 1 includes: a coupling 11, a ball screw 12, a slider 16, a motor 21, a controller 22, a power supply 24, a limit switch a25 and a limit switch b26. The motor 21 is connected to the ball screw 12 through the coupling 11, and the slider 16 is threadedly connected to the ball screw 12. The limit switch a25 and the limit switch b26 are arranged at both ends of the ball screw 12. The power supply 24 is connected to the controller 22, and the controller 22 is respectively connected to the motor 21, the limit switch a25 and the limit switch b26.

[0055] The controller 22 controls the slider 16 to slide repeatedly along the ball screw 12. Limit switches a25 and b26 are provided at both ends of the ball screw 12 to sense the position of the slider 16. When the slider touches one of the limit switches a25 or b26, the controller 22 is triggered to send a control signal, controlling the motor 21 to reverse, thereby driving the ball screw 12 to reverse, causing the slider 16 to slide in the reverse direction. When the slider 16 slides until it touches one of the limit switches a25 or b26 again, the motor 21 is triggered to reverse again, driving the ball screw 12 to reverse, and the slider 16 to slide in the reverse direction again, thereby achieving repeated sliding of the slider 16 along the ball screw 12. It should be noted that in this embodiment, the controller 22 is a controller with an integrated drive function.

[0056] Furthermore, when the controller does not integrate a driving function, the motor 21 is connected to the controller 22 and the power supply 24 through the driver 23 .

[0057] Example 8

[0058] On the basis of the above embodiment, a ball screw support seat 13 is further included, and two ends of the ball screw support seat 13 are respectively connected to two ends of the ball screw 12.

[0059] Example 9

[0060] Based on the above embodiment, a fixed support plate 14 is further included, and the motor 21, coupling 11, limit switch a25 and limit switch b26 are all mounted on the fixed support plate 14. The fixed support plate 14 improves the stability of the measurement.

[0061] Example 10

[0062] On the basis of the above embodiment, a guide rail 15 is further included, which is arranged below the guide rail 15 and is used to support the slider 16.

[0063] Example 11

[0064] A method for performing wear resistance testing using the above-mentioned bellows wear resistance testing device,

[0065] 1. Cut two bellows specimens 38 to be tested from the bellows;

[0066] 2. On each tested bellows spline 38, select N (N is an integer) locations that contact the prestressed tendon 3, where N ≥ 1, mark and record these locations, and measure and record the wall thickness of the tested bellows spline 38 at these locations.

[0067] 3. Measure the mass of each bellows spline 38 to be tested;

[0068] 4. Install the two bellows splines 38 to be tested on the left arc-shaped pressing block 36 and the right arc-shaped pressing block 39 respectively, and tighten the anti-slip baffles 37 on both sides of the left arc-shaped pressing block 36 and the right arc-shaped pressing block 39 respectively;

[0069] 5. Using the prestressed tendon 3 in the tensioned state as the positioning element, align the inner surface of the tested bellows spline 38 on the left arc-shaped pressing block 36 with the prestressed tendon 3;

[0070] 6. After adjusting the throttle valve 54, start the control program of the clamping mechanism 2, the electromagnetic reversing valve a52 loses power, and its valve A opens (valve B is closed). At the same time, the electromagnetic reversing valve b53 loses power, and its valve C opens. The control cylinder 43 pushes the bellows spline 38 to be tested, the right arc-shaped pressure block 39, the flange 41 and the floating joint 42 on the other side to move as a whole along the direction of the limit guide rod 35. Since the centers of the left arc-shaped pressure block 36, the right arc-shaped pressure block 39, the flange 41, the floating joint 42 and the cylinder 43 are in a straight line, the two bellows splines 38 to be tested will slowly clamp the prestressed tendon 3 until the load sensor 34 reaches the set pressure value. The electromagnetic reversing valve a52 loses power, and its valve A opens (valve B is closed). At the same time, the electromagnetic reversing valve b53 is energized, and its valve C is closed. When the pressure of the load sensor 34 is lower than the set value, the electromagnetic reversing valve a52 loses power and its valve A opens (valve B closes); at the same time, the electromagnetic reversing valve b53 loses power and its valve C opens; when the pressure of the load sensor 34 reaches the set value, the electromagnetic reversing valve a52 loses power and its valve A opens (valve B closes); at the same time, the electromagnetic reversing valve b53 is energized and its valve C closes; in this way, the valve of the electromagnetic reversing valve is closed or opened based on the pressure value of the load sensor 34, so that the clamping force of the bellows spline 38 to be tested on the prestressed tendon 3 is constant.

[0071] 7. Fix the limit switch a25 and limit switch b26 of the moving mechanism 1 to limit the displacement of the clamping mechanism 2.

[0072] 8. Start the control program of the moving mechanism 1, and use the limit switch a25 and the limit switch b26 to control the forward and reverse rotation of the motor 21, so that the slider 16 and the clamping mechanism 2 as a whole reciprocate at a certain speed.

[0073] 9. After the test is completed according to the test time, the moving mechanism 1 stops working, and the electromagnetic reversing valve a52 is energized, its valve B opens (valve A is closed), and at the same time, the electromagnetic reversing valve b53 loses power, its valve C opens, and the cylinder returns.

[0074] 10. After the cylinder returns, immediately remove the bellows spline 38 to be tested from the device, and immediately measure the residual wall thickness at the marked position on the bellows spline 38 to be tested before the test and record it. At the same time, measure the mass of each bellows spline 38 to be tested after the test.

[0075] 11. The wear resistance test of the corrugated pipe is achieved by measuring the pipe wall thickness and quality before and after the test.

[0076] The present invention adopts the method of testing the wear resistance of the inner wall of the bellows by testing the prestressed tendons 3. Since the prestressed tendons 3 are stretched after being inserted into the bellows one by one in actual working conditions, and the inside of the bellows is grouted again after the stretching is completed, the wear resistance test of the inner wall of the bellows is closer to the actual application conditions of the bellows. The sample used is the spline of the bellows, rather than the sample section of the bellows. The advantage of using the spline is that it is more conducive to the stress of the inner wall of the bellows and the prestressed tendons 3, especially for large-sized bellows, there is no need to design a larger fixture or larger equipment, thereby reflecting the strong adaptability of the device of the present invention. The sample used is the bellows The advantage of using a spline of a tube rather than a sample section of a bellows is that when a force is applied to the sample section of the bellows, due to the flexibility of the bellows, a certain deformation will occur, and the applied quantitative force is absorbed by the deformation of the bellows and is not fully applied to the test position, which has a certain impact on the measurement results. The invention adopts a cut bellows spline 38, which not only solves the influence of the bellows deformation on the test, but also makes the applied quantitative force fully act on the prestressed tendon 3 and the bellows spline 38 to be tested. Combined with the use of automated control, the clamping force between the prestressed tendon and the bellows spline 38 to be tested is kept constant, making the test results more precise and accurate.

[0077] It should be noted that the bellows wear resistance testing device described in the present invention is not limited to the wear resistance testing of bellows. By changing the shape or size of the left arc-shaped pressure block 36 and the right arc-shaped pressure block 39 and replacing the friction body prestressed reinforcement 3, the device can also be used for wear resistance testing of other flat, round and other pipes of different specifications, or wear resistance testing of other special-shaped products.

[0078] Although the present invention has been described in detail above using specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made based on the present invention. Therefore, such modifications or improvements, which do not depart from the spirit of the present invention, are intended to fall within the scope of protection claimed herein.

Claims

1. A bellows wear resistance testing device, characterized by: The cam is fixed to the left and right sides of the cam, and the cam is fixed to the right and left sides of the cam, so that the cam can move relative to the left and right sides of the cam. The blocks are opposite to each other; the right arc-shaped pressure block is connected to the constant force mechanism, and the arc surface of the left arc-shaped pressure block or the right arc-shaped pressure block is provided with a groove adapted to the outer circle of the bellows; the constant force mechanism includes a flange, a floating joint, a cylinder, a cylinder mounting seat, an air source, an electromagnetic reversing valve a, an electromagnetic reversing valve b, a throttle valve and a controller; one end of the flange is connected to the right arc-shaped pressure block, and the other end is connected to the cylinder through a floating joint, the cylinder is mounted on the cylinder mounting seat, and the cylinder mounting seat is fixed to the connecting plate; the air source is connected in series with the electromagnetic reversing valve a, the electromagnetic reversing valve b, and the throttle valve in sequence, and finally communicates with one end of the cylinder; the other end of the cylinder is also connected to the air source through the electromagnetic reversing valve a; the controller is respectively connected to the load sensor, the electromagnetic reversing valve a, and the electromagnetic reversing valve b, and by judging the pressure value of the load sensor, the valves of the electromagnetic reversing valve a and the electromagnetic reversing valve b are closed or opened, so that the clamping force of the tested bellows spline on the prestressed tendon is constant.

2. The bellows wear resistance testing device according to claim 1, characterized in that: It also includes reinforcing ribs, which are arranged on the outer sides of the left baffle and the right baffle and respectively connect the left baffle, the right baffle and the connecting plate.

3. The bellows wear resistance testing device according to claim 1, characterized in that: It also includes two or more anti-slip baffles, which are arranged in pairs in parallel on the arc-shaped surfaces of the left arc-shaped pressing block and the right arc-shaped pressing block.

4. The bellows wear resistance testing device according to claim 1, characterized in that: The moving mechanism includes: a coupling, a ball screw, a slider, a motor, a controller, a power supply, a limit switch a and a limit switch b. The motor is connected to the ball screw through a coupling, the slider is threadedly connected to the ball screw, the limit switch a and the limit switch b are arranged at both ends of the ball screw, the power supply is connected to the controller, and the controller is respectively connected to the motor, the limit switch a and the limit switch b. When the slider touches one of the limit switch a or the limit switch b, the controller is triggered to send a control signal, controlling the motor to reverse, thereby driving the ball screw to reverse, and causing the slider to slide in the opposite direction.

5. The bellows wear resistance testing device according to claim 4, characterized in that: It also includes a ball screw support seat, and the two ends of the ball screw support seat are respectively connected to the two ends of the ball screw.

6. The bellows wear resistance testing device according to claim 4, characterized in that: It also includes a fixed supporting plate, and the motor, coupling, limit switch a and limit switch b are all installed on the fixed supporting plate.

7. The bellows wear resistance testing device according to claim 4, characterized in that: It also includes a guide rail, which is arranged below the moving mechanism and is used to support the slider.

8. A method for performing wear resistance testing using the bellows wear resistance testing device according to claim 1, characterized in that: The following steps are involved: Step 1: Cut the bellows specimen to be tested from the bellows; Step 2: On the corrugated pipe spline to be tested, select the position that contacts the prestressed tendon, mark and record the position, and measure and record the wall thickness and mass of the corrugated pipe spline to be tested at the position; Step 3: Install the bellows spline to be tested on the clamping mechanism; Step 4: Using the prestressed tendon in the tensioned state as the positioning point, align the inner surface of the bellows spline to be tested on the clamping mechanism with the prestressed tendon; Step 5: Start the moving mechanism to make the clamping mechanism installed on the moving mechanism move repeatedly along the tensioning direction of the prestressed tendon; Step 6: After the test is completed according to the test time, the moving mechanism stops working, the bellows spline to be tested is removed from the clamping mechanism, the residual wall thickness at the marked position on the bellows spline to be tested is measured and recorded, and the mass of each bellows spline to be tested after the test is measured at the same time; Step 7: Evaluate the wear resistance of the corrugated pipe by measuring the pipe wall thickness and mass before and after the test.

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