Vacuum corrugated pipe service life testing machine

Abstract

The utility model belongs to the technical field of pipe service life testing, and relates to a vacuum corrugated pipe service life testing machine which comprises a machine frame and a working table arranged on the machine frame, a fixed plate and a movable plate are arranged on the working table in the length direction of the working table, and the movable plate is connected with a reciprocating motion mechanism used for driving the movable plate to be close to and away from the fixed plate. A plurality of sealing seats are arranged on the face, right facing the fixed plate, of the movable plate, connecting flanges are arranged at the ends of the sealing seats, connecting pipes coaxial with the sealing seats are arranged on the movable plate in a penetrating mode, connecting flanges are arranged at the ends, right facing the sealing seats, of the connecting pipes, and a vacuum gauge is arranged at the other ends of the connecting pipes. The connecting pipe is communicated with a hose which is connected with a vacuum pump. Through the plurality of connecting flanges arranged between the movable plate and the fixed plate, a plurality of corrugated pipes can be detected at the same time, so that the working efficiency is greatly improved; and high-pressure gas does not need to be introduced during testing, so that the testing cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows life test, in particular to a vacuum bellows life tester. Background Art

[0002] In the prior art, high-pressure gas (nitrogen) is often used to simulate the high-pressure working conditions of the bellows, and a mechanism that can move back and forth over a short distance is used to repeatedly compress and stretch the bellows to obtain the service life of the bellows, provide correct data for mass production, and improve the safety factor of the bellows.

[0003] However, there are still shortcomings in the existing technology. Although the short-range reciprocating mechanism can realize the action simulation of repeated compression and stretching of the bellows, the extreme working conditions of over-compression and over-stretching cannot be simulated, and more comprehensive bellows data cannot be collected; and the vibration generated by the equipment as a whole cannot be eliminated. Therefore, there is an urgent need for a bellows life test equipment with a larger repetitive stroke.

[0004] Patent No. CN202222804023.0 discloses a bellows life test device, including a base plate, a damper is fixedly connected to the top of the base plate, a spring is sleeved on the outer surface of the damper, a mounting plate is fixedly connected to the top of the damper, a gas storage tank is fixedly connected to the left end of the top of the mounting plate, a workbench is fixedly connected to the top of the mounting plate, a shell is fixedly connected to the left end of the top of the workbench, a pressure detector is fixedly connected to the top of the shell cavity, and a bellows body is fixedly connected to the right side of the shell by bolts. The utility model can simulate the compression and stretching actions of the bellows in short and long distances respectively through a long-stroke reciprocating mechanism, so that the bellows data collection is more comprehensive, and it has a shock-absorbing function, which is conducive to the use of the equipment. When using this test equipment, high-pressure gas needs to be introduced into the bellows, the test cost is high, and only one bellows can be tested at a time, and the efficiency is low. Therefore, the utility model proposes a vacuum bellows life tester. Utility Model Content

[0005] The main purpose of the utility model is to provide a vacuum bellows life tester, which can improve the testing efficiency of the bellows and reduce the testing cost.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a vacuum bellows life testing machine, comprising a frame and a workbench arranged on the frame, a fixed plate and a movable plate are arranged on the workbench along its length direction, the movable plate is connected with a reciprocating mechanism for driving it to approach and move away from the fixed plate, a plurality of sealing seats are arranged on the side of the movable plate facing the fixed plate, a connecting flange is arranged at the end of the sealing seat, a connecting pipe coaxial with the sealing seat is penetrated through the movable plate, a connecting flange is arranged at the end of the connecting pipe facing the sealing seat, a vacuum gauge is arranged at the other end of the connecting pipe, the connecting pipe is connected with a hose, and the hose is connected to a vacuum pump.

[0007] Preferably, the reciprocating mechanism includes two guide rods arranged on the workbench perpendicular to the length direction of the movable plate, the movable plate is movably connected to the guide rods, a ball screw is provided between the two guide rods, the movable plate is connected to the ball screw through a screw nut, and one end of the ball screw is connected to a servo motor.

[0008] Preferably, the lower end surfaces at both ends of the movable plate are fixed with L-shaped sheet metal supports with the vertical parts facing downwards, the bottom end of the L-shaped sheet metal support is provided with a hook-shaped bend, and the table top of the workbench is provided with a sliding groove along the direction perpendicular to the length of the movable plate, and the hook-shaped bend is slidably connected in the sliding groove.

[0009] Preferably, universal wheels are provided at the bottom of the frame.

[0010] The beneficial effects of the technical solution of the utility model are as follows: the application has a simple structure and can simulate the stretching and extrusion actions of the bellows; through the multiple connecting flanges arranged between the movable plate and the fixed plate, multiple bellows can be tested at the same time, which greatly improves the work efficiency; the bellows is evacuated by the vacuum pump, and the change of the vacuum degree in the bellows is monitored by the vacuum gauge to determine whether it is broken, without the need to introduce high-pressure gas, and the testing cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a layout diagram of the vacuum bellows life tester of the embodiment when it is working.

[0012] The numbers in the figure represent:

[0013] 1. Workbench; 2. Fixed plate; 3. Movable plate; 4. Sealing seat; 5. Universal wheel; 6. Connecting pipe; 7. Vacuum gauge; 8. Hose; 9. Control cabinet; 10. Rack; 11. Guide rod; 12. Ball screw; 13. Screw nut; 14. Servo motor; 15. Sheet metal support; 16. Slide; 17. Hook bend. DETAILED DESCRIPTION

[0014] The utility model is further described in detail below in conjunction with specific embodiments.

[0015] Example:

[0016] like Figure 1 As shown, a vacuum bellows life tester of the utility model comprises a frame 10 and a workbench 1 arranged on the frame 10, a fixed plate 2 and a movable plate 3 are arranged on the workbench 1 along its length direction, the movable plate 3 is connected with a reciprocating mechanism for driving it to approach and move away from the fixed plate 2, a plurality of sealing seats 4 are arranged on the side of the movable plate 3 facing the fixed plate 2, a connecting flange is arranged at the end of the sealing seat 4, a connecting pipe 6 coaxial with the sealing seat 4 is penetrated through the movable plate 3, a connecting flange is arranged at one end of the connecting pipe 6 facing the sealing seat 4, a vacuum gauge 7 is arranged at the other end of the connecting pipe 6, the connecting pipe 6 is connected with a hose 8, and the hose 8 is connected to a vacuum pump, a control cabinet 9 is arranged on the workbench 1, and the vacuum gauge 7, the vacuum pump and the reciprocating mechanism are all connected to the control cabinet 9. Flanges are provided at both ends of the bellows to be tested, and multiple bellows are connected between the fixed plate 2 and the movable plate 3 through the connecting flanges. The air in the bellows is discharged by the vacuum pump, and the vacuum gauge 7 monitors the vacuum degree in the bellows in real time. The reciprocating mechanism drives the movable plate 3 to move back and forth, thereby stretching and squeezing the bellows. When the bellows ruptures, the vacuum gauge 7 detects that the vacuum degree has changed, and the control cabinet 9 controls the reciprocating mechanism to stop working, and sends an alarm through the sound and light alarm preset on the control cabinet 9, so that the tester can check in time.

[0017] The reciprocating mechanism includes two guide rods 11 arranged on the workbench 1 perpendicular to the length direction of the movable plate 3, the movable plate 3 is movably connected to the guide rods 11, a ball screw 12 is arranged between the two guide rods 11, the movable plate 3 is connected to the ball screw 12 through a screw nut 13, and one end of the ball screw 12 is connected to a servo motor 14. The servo motor 14 drives the ball screw 12 to rotate, thereby driving the movable plate 3 to approach or move away from the fixed plate 2, thereby stretching and extruding the corrugated tube connected between the fixed plate 2 and the movable plate 3.

[0018] The lower end surfaces of both ends of the movable plate 3 are fixed with L-shaped sheet metal supports 15 with the vertical part facing downward, and the bottom end of the L-shaped sheet metal support 15 is provided with a hook-shaped bend 17. The table top of the workbench 1 is provided with a slide groove 16 along the length direction perpendicular to the movable plate 3, and the hook-shaped bend 17 is slidably connected in the slide groove 16. The sheet metal support 15 is used to support the bottom of the movable plate 3 and moves with the movable plate 3, so as to prevent the movable plate 3 from shaking in the vertical plane and make it run more smoothly.

[0019] The bottom of the frame is provided with universal wheels 5 to facilitate the movement of the testing machine.

[0020] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A vacuum bellows life tester, characterized in that: The invention comprises a frame and a workbench arranged on the frame, wherein a fixed plate and a movable plate are arranged on the workbench along the length direction thereof, the movable plate is connected with a reciprocating mechanism for driving it to approach and move away from the fixed plate, a plurality of sealing seats are arranged on a surface of the movable plate facing the fixed plate, a connecting flange is arranged at an end of the sealing seat, a connecting pipe coaxial with the sealing seat is penetrated through the movable plate, a connecting flange is arranged at an end of the connecting pipe facing the sealing seat, a vacuum gauge is arranged at the other end of the connecting pipe, the connecting pipe is connected with a hose, and the hose is connected to a vacuum pump.

2. According to the vacuum bellows life testing machine described in claim 1, the reciprocating mechanism includes two guide rods arranged on the workbench perpendicular to the length direction of the movable plate, the movable plate is movably connected to the guide rods, a ball screw is arranged between the two guide rods, the movable plate is connected to the ball screw through a screw nut, and one end of the ball screw is connected to a servo motor.

3. According to the vacuum bellows life testing machine described in claim 1, the lower end surfaces of both ends of the movable plate are fixed with L-shaped sheet metal supports with the vertical part facing downward, the bottom end of the L-shaped sheet metal support is provided with a hook-shaped bend, and the table surface of the workbench is provided with a slide groove along the direction perpendicular to the length of the movable plate, and the hook-shaped bend is slidably connected in the slide groove.

4. According to the vacuum bellows life tester as described in claim 1, universal wheels are provided at the bottom of the frame.

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