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High-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device and method

A technology of pneumatic solenoid valve and spool displacement, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems that the displacement of the main spool cannot be detected by the non-sealed structure, the measurement of the displacement of the spool is difficult, and the structure is complicated, etc. And the method is stable and reliable, the cost is low, and the effect of the device structure is simple

Inactive Publication Date: 2013-12-11
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also built-in displacement sensors such as eddy current displacement sensors, magnetic sensors, and sliding wire resistance sensors to detect the displacement of the valve core. These methods have complex structures and require special modifications to the valve core, which is expensive.
Japanese patent JPH0469475 proposes to convert the displacement of the valve core into the force of the compression spring, and obtain the displacement of the valve core by measuring the force of the spring. This method is also an indirect measurement, and the device is relatively complicated.
Chinese patent CN102692200 discloses "solenoid valve spool displacement automatic detection device and method" in which a probe is used to detect the displacement of the spool, but the displacement of the main spool in the valve body cannot be detected without a sealing structure
[0004] The main spool of the high-pressure pilot pneumatic solenoid valve is sealed in the valve body, and it is difficult to measure the displacement of the spool. At present, there is no relatively mature equipment and method for detection

Method used

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  • High-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device and method
  • High-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device and method

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] combine figure 1 , The high-pressure pilot-operated pneumatic solenoid valve spool displacement measuring device of the present invention includes a spool displacement transmission device, a laser displacement sensor 1, and a data acquisition instrument 2. The spool displacement transmission device includes a rubber tube 3 , a sealing cover 4 , a guide rod 5 , a measuring baffle 6 , a compression spring 7 , a fixing sleeve 8 and an adjusting nut 9 .

[0023] The specific installation process of the high-pressure pilot pneumatic solenoid valve spool displacement measuring device: the rubber tube 3 is glued and fixed on the first cylinder 10 of the sealing cover 4, and the sealing cover 4 is connected with the valve body of the measured valve with threads, and the The guide rod 5 is inserted into the rubber tube 3 through the central through hole of the...

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Abstract

The invention discloses a high-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device and method. The high-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device comprises a valve element displacement transmitting device, a laser displacement sensor and a data acquisition instrument, wherein the laser displacement sensor is arranged on the central axis of the valve element displacement transmitting device, and the laser displacement sensor is connected with the data acquisition instrument. The valve element displacement transmitting device comprises a rubber pipe, a sealing cover, a guide rod, a measurement stop plate, a pressing spring, a fixing sleeve and an adjustment nut. A through hole is formed in the sealing cover along the center. The guide rod penetrates through the through hole. The rubber pipe is arranged on the outer side of one end of the guide rod and fixed on the sealing cover. The measurement stop plate is fixed at the other end of the guide rod. One end of the pressing spring is fixed on the measurement stop plate. The other end of the pressing spring is fixed on the adjustment nut. The adjustment nut is fixed at one end of the fixing sleeve. The other end of the fixing sleeve is fixed on the sealing cover. According to the high-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device and method, the displacement of a valve element sealed inside a valve body is ingeniously transmitted, the test precision of the performance of an electromagnetic valve is improved, and the high-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device is simple in structure and low in cost.

Description

technical field [0001] The invention belongs to the electromagnetic valve performance testing technology, in particular to a high-pressure pilot type pneumatic electromagnetic valve main valve core displacement measuring device and method. Background technique [0002] As an important component in the automation control system, the high-pressure solenoid valve is used more and more widely. As an important performance index of the solenoid valve, the opening response of the high-pressure solenoid valve has a great influence on the practical application of the solenoid valve. The displacement measurement of the solenoid valve spool can accurately obtain the opening response of the solenoid valve, which is of great significance for the performance test of the solenoid valve. At the same time, the valve core opening of the solenoid valve can be obtained through the detection of the valve core displacement, and then the flow performance of the valve can be judged. [0003] In t...

Claims

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Application Information

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IPC IPC(8): G01B11/02
Inventor 李小宁董岱武兆平
Owner NANJING UNIV OF SCI & TECH
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