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Pneumatic valve control mechanism

A technology of pneumatic valves and control mechanisms, applied in engine components, valve details, multi-port valves, etc., can solve the problems of loss of complete sealing, rising use and maintenance costs, short service life of sealing rings, etc., to reduce installation space, use Long life and stable sealing performance

Pending Publication Date: 2019-03-29
SHANGHAI BOLONG EQUIP TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] In the working condition of the pneumatic conveying system with high pressure requirements and the medium wearing the sealing surface, the traditional valve structure is that the sealing ring between the valve body and the valve core is always in a squeezed state, when the cylinder drives the valve core to move Due to the high pressure of the conveying system, the seal ring will lose its complete sealing effect soon after wear, the service life of the guide seal ring is short, the replacement frequency of the seal ring is high, and the use and maintenance cost rises

Method used

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  • Pneumatic valve control mechanism
  • Pneumatic valve control mechanism
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Embodiment Construction

[0028] see Figure 1 to Figure 8 , the pneumatic valve control mechanism of the present invention, the pneumatic valve 100 includes: a valve body 31 and its upper valve cover 32, the valve body 31 is a three-way structure; a valve core 33 arranged in the valve body 31; A valve shaft 34 connected to the spool 33; the spool 33 is provided with a radially through channel; it includes a rotating cylinder 7, a cylinder driving actuator, a sealing control mechanism, and a spool action position detection mechanism;

[0029] The outer walls of the two ports of the corresponding passage of the spool 33 are respectively provided with a sealing groove 331 along the circumferential direction, and an inflatable sealing ring 35 is respectively arranged in the two sealing grooves 331; The spool inlet passage 332 communicated with the groove 331; the valve shaft inlet passage 341 is arranged axially in the valve shaft 34, and the valve shaft inlet passage 341 communicates with the valve core ...

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Abstract

A pneumatic valve control mechanism is disclosed, a pneumatic valve comprises a valve body and an upper valve cover, a valve spool, and a valve shaft. The valve spool is provided with a passage. The pneumatic valve control mechanism comprises a rotating cylinder, a cylinder driving actuator, a sealing control mechanism, and a valve spool action position detecting mechanism. The outer walls of thetwo ports of the valve spool are provided with sealing grooves along the circumferential direction, and an inflatable sealing ring is arranged in the sealing groove. A spool intake passage communicating with the sealing groove is arranged in the valve spool along the radial direction. A valve shaft intake passage communicating with the spool intake passage is axially arranged in the valve shaft. The spool intake passage communicates with the inflatable sealing ring. The valve spool is actuated through the cylinder, after the valve spool reaches the set position and the air pressure is controlled to inflate and pressurize the sealing ring, so that the valve meets the requirement for complete sealing. According to the requirements for use, the pressure of the gas entering the sealing ring can be adjusted by a filter pressure reducing valve. The control mechanism of the invention can be used under the working conditions of high sealing performance requirement and abrasion on the sealing surface, thereby achieving the function of safe, reliable and stable operation of the equipment and reducing the maintenance frequency of the equipment.

Description

technical field [0001] The invention relates to valve control technology, in particular to a pneumatic valve control mechanism. Background technique [0002] In the working condition of the pneumatic conveying system with high pressure requirements and the medium wearing the sealing surface, the traditional valve structure is that the sealing ring between the valve body and the valve core is always in a squeezed state, when the cylinder drives the valve core to move Due to the high pressure of the conveying system, the seal ring loses its complete sealing effect soon after wear, the service life of the guide seal ring is short, the replacement frequency of the seal ring is high, and the maintenance cost increases. Contents of the invention [0003] The purpose of the present invention is to propose a pneumatic valve control mechanism, which can ensure that the sealing ring is not worn out, and can ensure stable sealing performance of the valve when the pressure of the conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/085F16K37/00F16K31/16F16K5/18
CPCF16K5/188F16K11/0853F16K31/16F16K37/0083
Inventor 吴勇
Owner SHANGHAI BOLONG EQUIP TECH CO LTD
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