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Linear valve pneumatic actuator testing device

A pneumatic actuator and pneumatic execution technology, applied in the testing of machines/structural components, measuring devices, instruments, etc., can solve problems such as opening and closing failures, inaccurate control, and force values ​​that cannot meet the specified requirements, and achieve maintenance The effect of low cost, high test accuracy and fast detection speed

Inactive Publication Date: 2013-11-27
QUALITY INSPECTING CENT OF PUMP & VALVE PROD OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is that there is no test for valve pneumatic actuators for no-load test, load test, sealing test, strength test and action life test for single-acting linear valve pneumatic actuators and double-acting linear valve pneumatic actuators. The quality of the valve pneumatic actuator cannot be guaranteed. After being put into use, the quality of the linear and double-acting rotary valve pneumatic actuators is found to be unstable. After a period of use, the output force value cannot meet the specified requirements, resulting in inaccurate control, and The rubber film or rubber seal in the single-acting linear valve pneumatic actuator and the double-acting linear valve pneumatic actuator, due to wear and tear caused by sliding friction, or inferior rubber aging phenomenon, can easily cause cylinder seal leakage, resulting in output force value Insufficient opening and closing failure, etc., due to the seal of the cylinder piston polished rod and the composite bearing, there is a certain oil film on the surface, and the pipeline is exposed to the site for a long time and is easily bonded by the dust on site, resulting in jamming and jumping when the cylinder is opened and closed, and Leakage caused by cylinder seal failure
The quality problems of the above-mentioned single-acting linear valve pneumatic actuators and double-acting linear valve pneumatic actuators are often neglected by people, which eventually lead to problems in the automatic control of the pipeline and the occurrence of safety accidents

Method used

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  • Linear valve pneumatic actuator testing device

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Experimental program
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Effect test

Embodiment 1

[0075] The working principle of embodiment one is as follows:

[0076] When carrying out the no-load test, sealing test and strength test, only the high-pressure air source is used as the power to drive the single-acting linear valve pneumatic actuator sample 37 to move. At this time, the second gas storage tank 19 and the third gas storage tank 11 and the back pressure Cylinder 57 all does not act.

[0077] During the load test and action life test, the sample 37 of the single-acting linear valve pneumatic actuator is divided into two stages of motion process: forward and downward and reset and rising:

[0078] (1) When the sample 37 of the single-acting linear valve pneumatic actuator moves forward and falls, the first gas storage tank 26 provides pressure to push the single-acting linear valve pneumatic actuator sample 37 to move. At this time, the second gas storage tank 19 provides The pressure is given to the first port 57-1 of the back pressure cylinder as the load out...

Embodiment 2

[0082] The rest of the structure of the second embodiment is the same as that of the first embodiment.

[0083] The working principle of the second embodiment differs from that of the first embodiment in that the first gas storage tank 26, the second gas storage tank 19 and the third gas storage tank 11 do not operate during the no-load test, sealing test and strength test , from gas source 1 through the first high-pressure supply pipeline to the first port of the double-acting linear valve pneumatic actuator sample for experiments, and from gas source 1 to the double-acting linear valve pneumatically actuated through the second high-pressure supply pipeline The second port of the device sample is supplied with air for experiments, and the compressed air in the first high-pressure supply pipeline is controlled by the first high-pressure solenoid valve and the compressed air in the second high-pressure supply pipeline is controlled by the second high-pressure solenoid valve. Th...

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Abstract

The invention relates to a linear valve pneumatic actuator testing device. By means of the testing device, no-load tests, load tests, seal tests, strength tests and motion life tests can be carried out on single-action linear valve pneumatic actuators and double-action linear valve pneumatic actuators. Two stable-pressure air storage tanks are used for supply air for the two ends of a pressure cylinder, output torque or a push-pull effort value needed for the tests can be obtained, and therefore valve pneumatic actuators with higher precision can be tested.

Description

technical field [0001] The invention relates to a testing device for a valve pneumatic actuator, in particular to a testing device for a linear valve pneumatic actuator. Background technique [0002] With the development of automatic control technology, intelligent control and remote control are increasingly used in pipeline transportation construction. Valves with automatic control technology replace manual valves, which greatly reduces the danger of operators operating valve pressure components at close range and improves Work efficiency, to realize the opening and closing of the pipeline system, the adjustment and control of the flow, the valve automatic actuators include electric, electromagnetic, hydraulic and pneumatic actuators, of which single-acting linear valve pneumatic actuators and double-acting linear valves Valve pneumatic actuator is the most rapid valve control product developed and put into use in recent years. It is more and more widely used in pipeline tr...

Claims

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Application Information

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IPC IPC(8): G01M99/00
Inventor 陈敬秒林美王一翔吴建东孙丰位
Owner QUALITY INSPECTING CENT OF PUMP & VALVE PROD OF ZHEJIANG PROVINCE
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