Detection method and device of internal leakage of hydraulic valve
A detection method and detection device technology, applied in the field of leak detection, can solve problems such as difficult maintenance and replacement, leakage of the test system, poor anti-pollution ability, etc., and achieve the effect of fast detection, high precision and low cost
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[0025] Example 1
[0026] A method for detecting leakage in a hydraulic valve, using a combination of hydraulic cylinder 7 and displacement sensor 8. The hydraulic cylinder 7 and the tested hydraulic valve 1 are connected to the test pipeline, and the displacement of the piston of the hydraulic cylinder 7 is detected, and a section is calculated. The leakage of the tested hydraulic valve 1 within the time period is tested for leakage in the hydraulic valve.
[0027] When detecting the displacement of the piston of the hydraulic oil cylinder 7, a computer is used to collect the signal of the displacement sensor 8 through the board card and calculate. After the displacement of the piston of the detected hydraulic cylinder 7 is obtained by calculation, the signal of the pressure sensor 6 installed in the test pipeline is collected at the same time, and the curve of the leakage amount in the tested hydraulic valve 1 under a certain pressure is drawn by calculation.
Example Embodiment
[0028] Example 2
[0029] A device for detecting leakage in a hydraulic valve, including a test bench, a double one-way electromagnetic reversing valve 2, an electromagnetic reversing valve 4, and a hydraulic cylinder 7. The test bench is connected with a double one-way electromagnetic reversing valve. 2 and the electromagnetic reversing valve 4, the hydraulic cylinder 7 is connected to the test pipeline, the displacement sensor 8 is installed above the cylinder tube of the hydraulic cylinder 7, and the displacement sensor sensing rod is connected to the piston rod of the hydraulic cylinder 7. The test pipeline is equipped with a check valve 5 and an overflow valve 3. The test pipeline is equipped with the tested hydraulic valve 1 interface.
[0030] The test pipeline is equipped with a pressure sensor 6, and the pressure sensor 6 and the displacement sensor 8 are connected to the computer.
[0031] The principle and specific structure action process of this embodiment:
[0032] Det...
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