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Novel pneumatic three-way controller

A controller and three-way technology, applied to multi-way valves, engine components, valve details, etc., can solve the problems of product connection pipe leakage, large machine shape, and complicated debugging, so as to ensure sealing performance and low manufacturing cost , the effect of wide pressure regulation range

Active Publication Date: 2016-04-13
WUZHONG INSTR
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Adopting this kind of scheme has the disadvantages that the product connecting pipeline is easy to leak, debugging is complicated, the overall shape of the machine is large, and the cost is high

Method used

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Embodiment 1

[0026] Such as figure 2 , 3 As shown, the present invention provides a new type of pneumatic three-way control that can flexibly set the fault value of the air source pressure according to the site requirements, automatically monitor the air source pressure, and make the pneumatic instrument automatically reset or run to the full open / full close position according to the control requirements. to replace the traditional control scheme that uses a combination of two pneumatic components. When the input pressure of the SIG port of the new pneumatic three-way controller is greater than the air source failure set value set by the pressure regulating spring 2, the A port (the first inlet) of the controller is connected to the C port (the second outlet), and the B port is connected. Port (the first outlet) is not connected to port A and port C; when the input pressure of the SIG port (signal port) of the controller is less than the set value of the air source failure, the port A of...

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Abstract

The invention relates to a novel pneumatic three-way controller. The novel pneumatic three-way controller comprises a lower gas cavity (11), a middle gas cavity (7), an upper gas cavity (4) and an upper cover (3), all of which are sequentially connected from bottom to top. A pressure regulating screw (13) is installed in the upper cover (3), part of the pressure regulating screw (13) extends out of the upper cover (3), a first film (16) is installed between the upper gas cavity (4) and the upper cover (3), and the bottom end of the pressure regulating screw (13) is connected with a tray assembly. The novel pneumatic three-way controller is characterized in that a second film (5) is installed between the middle gas cavity (7) and the upper gas cavity (4) and a sealing ring is installed between the lower gas cavity (11) and the middle gas cavity (7), so that the lower gas cavity (11) and the middle gas cavity (7) are sealed in an airtight manner. By the adoption of the novel pneumatic three-way controller, the functions achieved through combination of a pneumatic pressure switch and a three-way pneumatic control reversing valve in the background technology can be achieved, and the controller further has the advantages of being small in whole machine size and wide in pressure regulating range.

Description

technical field [0001] The invention relates to a novel pneumatic three-way controller. Background technique [0002] The traditional control scheme is as follows: when it is necessary to detect the air source pressure of the instrument and realize the gas circuit reversing in the pneumatic control circuit, the combination of "pneumatic pressure switch" and "pneumatic three-way reversing valve" is used to realize it. Such as figure 1 As shown, the control case of a pneumatic control valve in the process control industry is used to briefly describe the traditional control scheme: the pressure reducing valve decompresses the air source and then inputs it to the positioner, and the positioner controls the control valve according to the 4-20mA current signal output by the DCS. Carry out regulating control; the control system of the regulating valve requires that when the air source pressure of the regulating valve is lower than a certain value, the compressed air in the pressur...

Claims

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Application Information

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IPC IPC(8): F16K11/044F16K31/126
CPCF16K11/044F16K31/1264F16K31/1268
Inventor 马玉山余少华贾华杨富江姜军陈玉玲
Owner WUZHONG INSTR
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