Stretcher fatigue testing device

Abstract

The utility model relates to stretcher testing technical field, concretely relates to a stretcher fatigue test device, including gas path, oil circuit and test platform, oil circuit links with gas path, and gas path and oil circuit are arranged in the inside of test platform respectively, gas path includes quick -change connector, water oil separator, tee joint, multiple high -pressure gas pipes and pneumatic needle valve, quick -change connector is connected with water oil separator, water oil separator is connected with tee joint, and multiple high -pressure gas pipes link with tee joint, and the high -pressure gas pipe is set up on pneumatic needle valve, through above -mentioned structure, the accuracy of the service life data that the stretcher test obtains is realized to improve.

Description

Technical Field

[0001] This utility model relates to the field of tensile testing technology, and in particular to a tensile fatigue testing device. Background Technology

[0002] The basic function of existing hydraulic tensioner testing fixtures is to test the pressure holding condition of the tensioner in a few tensile processes. However, the service life of the tensioner can often only be estimated by using the SN or EN curves obtained from fatigue tests on smooth specimens. However, the data obtained from these two types of fatigue curves are very different from the actual design and use of the tensioner, making it impossible to obtain more accurate data on the service life of the tensioner. Utility Model Content

[0003] The purpose of this invention is to provide a fatigue testing device for tensioners, which solves the problem that the data obtained when testing tensioners differs greatly from the actual design and use of the tensioners, making it impossible to obtain more accurate data on the service life of the tensioners.

[0004] To achieve the above objectives, this utility model employs a tensile fatigue testing device, comprising an air circuit, an oil circuit, and a testing platform, wherein the oil circuit is connected to the air circuit, and the air circuit and the oil circuit are respectively disposed inside the testing platform;

[0005] The air circuit includes a quick-connect coupling, a water-oil separator, a three-way connector, multiple high-pressure air hoses, and a pneumatic needle valve. The quick-connect coupling is connected to the water-oil separator, the water-oil separator is connected to the three-way connector, the multiple high-pressure air hoses are connected to the three-way connector, and the high-pressure air hoses are installed on the pneumatic needle valve.

[0006] The oil circuit includes an oil tank, a pneumatic hydraulic pump, a filter, a four-way pipe, an oil outlet connector, and multiple high-pressure oil pipes. The oil tank is located inside the test bench. The pneumatic hydraulic pump is connected to the oil tank. The filter is installed on the oil tank. The four-way pipe is connected to the oil tank, the pneumatic hydraulic pump, and the oil outlet connector. The multiple high-pressure oil pipes are installed on the four-way pipe.

[0007] The air circuit also includes an air pressure gauge and an air regulating valve. The air regulating valve is connected to the three-way connector, and the air pressure gauge is installed on the air regulating valve.

[0008] The oil circuit also includes a pressure sensor, which is installed on the four-way pipe.

[0009] The test bench includes a frame assembly, an electrical control assembly, and a switching power supply. The air circuit and the oil circuit are respectively connected to the frame assembly, the electrical control assembly is connected to the oil circuit, and the switching power supply is located on the inner side wall of the frame assembly.

[0010] This utility model discloses a fatigue testing device for a tensile tester. Compressed air enters through the quick-change connector and is distributed through the three-way connector. One path, after adjustment, drives the oil circuit, while the other path is directly connected to the pneumatic needle valve to control the pressure holding and releasing of the oil circuit. The air circuit and oil circuit are connected to the hydraulic tensile tester for testing, thereby improving the accuracy of the service life data obtained from the tensile tester. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the tensile fatigue testing device of this utility model.

[0013] Figure 2 This is a schematic diagram of the air passage structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the oil circuit structure of this utility model.

[0015] 10-Air circuit, 11-Quick-change connector, 12-Water-oil separator, 13-Air pressure gauge, 14-T-connector, 15-High-pressure air pipe, 16-Pneumatic needle valve, 17-Air regulating valve, 20-Oil circuit, 21-Oil tank, 22-Pneumatic hydraulic pump, 23-Filter, 24-Pressure sensor, 25-Four-way pipe, 26-Oil outlet connector, 27-High-pressure oil pipe, 30-Test bench, 31-Frame assembly, 32-Electrical control assembly, 33-Switching power supply. Detailed Implementation

[0016] Please see Figures 1-3 ,in Figure 1 This is a schematic diagram of the tensile fatigue testing device. Figure 2 This is a schematic diagram of the air passage structure. Figure 3 This is a schematic diagram of the oil circuit.

[0017] This utility model provides a fatigue testing device for a tensile tester: it includes an air passage 10, an oil passage 20 and a test bench 30, wherein the oil passage 20 is connected to the air passage 10, and the air passage 10 and the oil passage 20 are respectively disposed inside the test bench 30;

[0018] The air circuit 10 includes a quick-connect coupling 11, a water-oil separator 12, a three-way connector 14, multiple high-pressure air pipes 15, and a pneumatic needle valve 16. The quick-connect coupling 11 is connected to the water-oil separator 12, the water-oil separator 12 is connected to the three-way connector 14, the multiple high-pressure air pipes 15 are connected to the three-way connector 14, and the high-pressure air pipes 15 are provided on the pneumatic needle valve 16.

[0019] In this embodiment, the compressed air entering through the quick-connect coupling 11 is distributed through the three-way coupling 14. One path is adjusted to drive the oil circuit 20, while the other path is directly connected to the pneumatic needle valve 16 to control the pressure holding and depressurization of the oil circuit 20. The air circuit 10 and the oil circuit 20 are connected to the hydraulic tensioner for testing, thereby improving the accuracy of the service life data obtained from the tensioner test.

[0020] Furthermore, the oil circuit 20 includes an oil tank 21, a pneumatic hydraulic pump 22, a filter 23, a four-way pipe 25, an oil outlet connector 26, and multiple high-pressure oil pipes 27. The oil tank 21 is located inside the test bench 30. The pneumatic hydraulic pump 22 is connected to the oil tank 21. The filter 23 is installed on the oil tank 21. The four-way pipe 25 is connected to the oil tank 21, the pneumatic hydraulic pump 22, and the oil outlet connector 26, respectively. The multiple high-pressure oil pipes 27 are installed on the four-way pipe 25.

[0021] Furthermore, the air passage 10 also includes an air pressure gauge 13 and an air regulating valve 17, the air regulating valve 17 being connected to the three-way connector 14, and the air pressure gauge 13 being installed on the air regulating valve 17.

[0022] Furthermore, the oil circuit 20 also includes a pressure sensor 24, which is installed on the four-way pipe 25.

[0023] Furthermore, the test bench 30 includes a frame assembly 31, an electrical control assembly 32, and a switching power supply 33. The air passage 10 and the oil passage 20 are respectively connected to the frame assembly 31, the electrical control assembly 32 is connected to the oil passage 20, and the switching power supply 33 is disposed on the inner side wall of the frame assembly 31.

[0024] In this embodiment, compressed air is introduced into the external high-pressure air source interface. The required pressure, pressure holding time, and interval time are adjusted through the control panel. The pneumatic hydraulic pump 22 is controlled by the air regulating valve 17 and the pneumatic needle valve 16. The specific control process is as follows:

[0025] Compressed air entering through the quick-connect coupling 11 is distributed at the three-way connector 14. One path, after being adjusted by the air pressure regulating valve, drives the pneumatic hydraulic pump 22 in the oil circuit 20. The other path is directly connected to the pneumatic needle valve 16 to control the pressure holding and releasing of the oil circuit 20. The filter 23 is installed on the oil tank 21 to prevent impurities in the hydraulic oil from affecting the fatigue test. The pneumatic hydraulic pump 22 operates by supplying compressed air through the air circuit 10, sending hydraulic oil from the oil tank 21 to the high-pressure oil pipe 27. The high-pressure oil pipe 27 then delivers the oil to the outlet connector 26 through the four-way pipe 25. The pressure sensor 24 is installed at pipe 25. The pressure sensor 24 can be selected with different ranges according to different test pressures. The electronic control assembly 32 controls the on / off of compressed air, thereby controlling the pneumatic hydraulic pump 22 and the pneumatic needle valve 16 to stop pressurizing when the specified pressure is reached, and automatically release pressure when the pressure holding time is reached, and automatically start the next cycle. During this process, the electronic control assembly 32 automatically records the number of tests. The air circuit 10 and oil circuit 20 are both installed on the frame assembly 31. The air circuit 10 and oil circuit 20 are connected to the hydraulic tensioner through the high-pressure oil pipe 27 for testing, thereby improving the accuracy of the service life data obtained from the tensioner test.

[0026] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A fatigue testing device for a tensile tester, characterized in that, It includes an air circuit, an oil circuit, and a test bench, wherein the oil circuit is connected to the air circuit, and the air circuit and the oil circuit are respectively disposed inside the test bench; The air circuit includes a quick-connect coupling, a water-oil separator, a three-way connector, multiple high-pressure air hoses, and a pneumatic needle valve. The quick-connect coupling is connected to the water-oil separator, the water-oil separator is connected to the three-way connector, the multiple high-pressure air hoses are connected to the three-way connector, and the high-pressure air hoses are installed on the pneumatic needle valve.

2. The tensile fatigue testing apparatus as described in claim 1, characterized in that, The oil circuit includes an oil tank, a pneumatic hydraulic pump, a filter, a four-way pipe, an oil outlet connector, and multiple high-pressure oil pipes. The oil tank is located inside the test bench. The pneumatic hydraulic pump is connected to the oil tank. The filter is installed on the oil tank. The four-way pipe is connected to the oil tank, the pneumatic hydraulic pump, and the oil outlet connector, respectively. The multiple high-pressure oil pipes are installed on the four-way pipe.

3. The tensile fatigue testing apparatus as described in claim 1, characterized in that, The air circuit also includes an air pressure gauge and an air regulating valve. The air regulating valve is connected to the three-way connector, and the air pressure gauge is installed on the air regulating valve.

4. The tensile fatigue testing apparatus as described in claim 2, characterized in that, The oil circuit also includes a pressure sensor, which is installed on the four-way pipe.

5. The tensile fatigue testing apparatus as described in claim 1, characterized in that, The test bench includes a frame assembly, an electrical control assembly, and a switching power supply. The air circuit and the oil circuit are respectively connected to the frame assembly, the electrical control assembly is connected to the oil circuit, and the switching power supply is located on the inner side wall of the frame assembly.

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