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Pneumatic relay

A technology for relays and intake valves, applied to engine components, valve details, multi-way valves, etc., can solve the problems of large jump value, large effective area, and large insensitive area, and achieve area reduction and industrial Great benefits and lower machining accuracy

Pending Publication Date: 2018-09-21
MERCURY INSTR CHENGDU CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is used to solve the problem of output hysteresis caused by the difference between the effective area of ​​the relay diaphragm seat moving to the left and the effective area after moving to the right, and the effective area of ​​the intake valve core of the relay. The area is large, the jump value is large and the insensitive area is large when the two working conditions transition, and the impact of input gas source pressure fluctuations on the output pressure is reduced, and the leakage flow balance point is controlled when the output flow is zero. Relay working range

Method used

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  • Pneumatic relay
  • Pneumatic relay
  • Pneumatic relay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] like image 3 As shown, a pneumatic relay includes two parts: the base pressure body and the back pressure body: the back pressure housing 35 of the back pressure body has built-in threads, and the intake valve seat 76 of the relay is connected by thread Screw into the back pressure housing 35, so that the intake valve seat 76 can move axially in the back pressure housing 35, and fix it with the set screw 72 after the movement is completed; the tail of the intake valve core 30 of the relay grows to form a tail The straight shank section L, the tail straight shank section L is inserted into the assembly formed by the pressure ring 74 and the guide sleeve 75, and then installed in the intake valve seat 76 as a whole; the intake valve core 30 and the exhaust valve core of the relay The center of 31 is provided with a through hole, which is docked with the through hole in the center of the diaphragm seat 38 of the relay to form an exhaust passage 69, and the exhaust passage...

Embodiment 2

[0059] like Figure 4 As shown, a pneumatic relay includes two parts: the base pressure body and the back pressure body: the back pressure housing 35 of the back pressure body has built-in threads, and the intake valve seat 76 of the relay is connected by thread Screw into the back pressure housing 35, so that the intake valve seat 76 can move axially in the back pressure housing 35, and fix it with the set screw 72 after the movement is completed; the tail of the intake valve core 30 of the relay grows to form a tail The straight shank section L, the tail straight shank section L is inserted into the assembly formed by the pressure ring 74 and the guide sleeve 75, and then installed in the intake valve seat 76 as a whole; the intake valve core 30 and the exhaust valve core of the relay The center of 31 is provided with a through hole, which is docked with the through hole in the center of the diaphragm seat 38 of the relay to form an exhaust passage 69, and the exhaust passag...

Embodiment 3

[0062] like Figure 7 , Figure 8 As shown, the Ps gas path on the upper part of the base pressure shell is adjusted, and the gas source directly enters the working chamber 60, so that the working chamber 60 serves as the base pressure chamber, and the working chamber 59 serves as the evacuation chamber, and other unrelated structures do not change.

[0063] Description of working principle:

[0064] When the position of the diaphragm is manufactured and assembled, the results are not ideal, and at the same time, the Figure 5 It can be seen that the diaphragm has different equivalent diameters, that is, different effective working areas, in different positions. By adjusting the intake valve seat 76, the exhaust valve core 31 moves axially to change the relative length of the exhaust valve core 31, and the effective working area becomes a controllable parameter. suppression. In the design, the sealing specific pressure of the intake valve core is maintained, and the diamet...

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Abstract

The invention relates to a pneumatic relay. The pneumatic relay comprises a base pressure body and a back pressure body, wherein threads are formed in the back pressure body, an air inlet valve seat of the relay is screwed into the back pressure body through threads, can axially move in the back pressure body and is fixed through a fastening screw after the movement is finished; the tail of an airinlet valve core of the relay is lengthened to form a tail straight handle section, and the tail straight handle section is inserted into an assembly formed by a pressure ring and a guiding sleeve and is integrally mounted into the air inlet valve seat; and through holes are formed in the air inlet valve core and an exhausting valve core of the relay are butted with a central through hole of a diaphragm seat of the relay so as to form an exhausting channel, and a through hole formed in the exhausting channel is communicated with an output cavity of the cavity. According to the pneumatic relay, the air inlet valve seat can axially move, the length of the valve core can be relatively adjusted, the effective working area of the air inlet valve core is small, so that the output return difference is reduced, the kick value during the transition of two working conditions is reduced, an insensitive region is narrowed, and the leakage flow balance point is far away from the working range of the relay.

Description

technical field [0001] The invention relates to the technical field, in particular to a pneumatic relay. Background technique [0002] Pneumatic relays provide high-precision controlled air sources for pneumatic instruments. The output accuracy of pneumatic relays determines the working accuracy of pneumatic instruments. The dynamic characteristics of pneumatic relays directly affect the stability of pneumatic instruments. figure 1 The relay shown is a commonly used relay in China, such as figure 2 When the back pressure Pn increases, the output pressure P+ 0=f(Pn) increases accordingly, and when the back pressure Pn decreases, the output pressure P- 0=f(Pn) decreases accordingly, to ensure that there is P+ under the specified back pressure Pn 0=P- 0, (ie △P 0 ≈0), it must be strictly guaranteed that the effective working area of ​​the diaphragm 14, 16 when the diaphragm seat 15 moves to the direction is equal to the effective working area of ​​the diaphragm 14, 16 after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/04F16K11/10F16K31/126
CPCF16K11/04F16K11/10F16K31/1266F16K31/1268
Inventor 胡正超雷科扬
Owner MERCURY INSTR CHENGDU CORP
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