Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

Inactive Publication Date: 2013-01-09
天津鼎成高新技术产业有限公司
View PDF5 Cites 38 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing hydraulic valve internal leakage detection technology generally adopts the method of direct measurement by flowmeter. Since the internal leakage of some hydraulic valves is very small, it is more expensive to use a low-flow high-precision flowmeter, and its anti-pollution ability is poor, which is not easy to detect. Repair and Replacement
Coupled with the leakage of the test system itself, there are technical problems such as measurement accuracy, detection cost and detection efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Detection method and device of internal leakage of hydraulic valve
  • Detection method and device of internal leakage of hydraulic valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for detecting internal leakage of a hydraulic valve, using a combination of a hydraulic cylinder 7 and a displacement sensor 8, the hydraulic cylinder 7 and the hydraulic valve 1 to be tested are connected to a test pipeline, and the displacement of the piston of the hydraulic cylinder 7 is converted to calculate a section The leakage of the hydraulic valve 1 under test within a certain period of time is used to detect the leakage in the hydraulic valve.

[0027] When detecting the displacement of the piston of the hydraulic cylinder 7, it is calculated by using a computer to collect the signals of the displacement sensor 8 through the board. After calculating and detecting the displacement of the piston of the hydraulic cylinder 7, the signal of the pressure sensor 6 installed in the test pipeline is collected at the same time, and the curve of the leakage of the tested hydraulic valve 1 under a certain pressure is drawn through calculation.

Embodiment 2

[0029] A detection device for internal leakage of 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, and a test pipeline connected to the double one-way electromagnetic reversing valve on the test bench 2, the electromagnetic reversing valve 4, and the hydraulic cylinder 7 are connected to the test pipeline, the displacement sensor 8 is installed above the cylinder barrel of the hydraulic cylinder 7, and the sensing rod of the displacement sensor is connected to the piston rod of the hydraulic cylinder 7. The test pipeline is equipped with a one-way valve 5 and a relief valve 3. The test pipeline is provided with the hydraulic valve 1 interface to be tested.

[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 of this embodiment and the concrete str...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a detection method and device of internal leakage of a hydraulic valve and belongs to the technical field of leakage detection. The detection method of the internal leakage of the hydraulic valve comprises the following steps of: adopting a combined manner of a hydraulic oil cylinder and a displacement sensor, connecting the hydraulic oil cylinder and a tested hydraulic valve with a test pipeline, converting and calculating the leakage volume of the tested hydraulic valve in a certain period of time by detecting the displacement of a piston of the hydraulic oil cylinder, and detecting the internal leakage of the hydraulic valve. The detection device of the internal leakage of the hydraulic valve comprises an experiment bench, a bidirectional-unidirectional magnetic exchange valve, a magnetic exchange valve and the hydraulic oil cylinder, wherein the test pipeline is arranged on the experiment bench and connected with the bidirectional-unidirectional magnetic exchange valve and the magnetic exchange valve, the hydraulic oil cylinder is connected with the test pipeline, a piston rod of the hydraulic oil cylinder is connected with the displacement sensor, and an tested hydraulic valve interface is arranged on the test pipeline. The detection apparatus of the internal leakage of the hydraulic valve has the advantages of simple structure, quick detection, lower cost, higher precision and high working efficiency. The method and the device are suitable for testing of pressure valves, direction valves, multipath valves, flow valves and the like.

Description

technical field [0001] The invention belongs to the technical field of leak detection, and in particular relates to a method and a device for detecting internal leakage of a hydraulic valve. Background technique [0002] At present, with the development of hydraulic technology, there are more and more requirements for the application of hydraulic valve sealing, valve internal leakage detection, especially dynamic testing with high precision and small flow rate in modern industry. The existing hydraulic valve internal leakage detection technology generally adopts the method of direct measurement by flowmeter. Since the internal leakage of some hydraulic valves is very small, it is more expensive to use a low-flow high-precision flowmeter, and its anti-pollution ability is poor, which is not easy. Repair and Replacement. Coupled with the leakage of the test system itself, there are technical problems such as measurement accuracy, detection cost and detection efficiency. Con...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F15B19/00G01M3/02
Inventor 沈延康张瑜东方罗学惠张建武
Owner 天津鼎成高新技术产业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com