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Pilot-operated type proportional flow valve with position and flow composite feedback function

A technology of proportional flow valve and composite feedback, which is applied in the direction of valve details, valve device, valve operation/release device, etc., can solve the problem that the control accuracy cannot meet the strict requirements of component control, and the thermal flow sensor has low dynamic response and cannot be very fast. To meet the needs of real-time control in the field of automation and other issues, to achieve the effect of reasonable structure, improved stability and improved accuracy

Active Publication Date: 2020-06-09
XINGYU ELECTRON NINGBO CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the proportional flow valve with direct flow feedback can provide high-precision flow control, due to the relatively low dynamic response of the thermal flow sensor, it still cannot meet the real-time control needs of rapid response in the automation field.
The proportional flow valve with position feedback can provide high dynamic response, but the position of the spool is not the final control variable, so its control accuracy still cannot meet the stringent requirements for composition control in the field of atmosphere configuration control

Method used

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  • Pilot-operated type proportional flow valve with position and flow composite feedback function
  • Pilot-operated type proportional flow valve with position and flow composite feedback function
  • Pilot-operated type proportional flow valve with position and flow composite feedback function

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] Such as Figure 1 to Figure 8 Shown is the structural representation of the present invention,

[0034] The reference signs are: first nonlinear characteristic relationship L1, linear relationship L2, second nonlinear characteristic relationship L3, pilot valve inlet P1, pilot valve pressure relief port R1, pilot valve control port K1, main valve supply Air port P2, main valve exhaust port R2, main valve control port K2, working port A, pilot valve 1, controller 11, processor 11a, M / A analog-to-digital converter 11b, input / output interface circuit 11c, display Circuit 11d, power supply 11e, solenoid valve drive circuit 11f, pilot valve module 12, intake solenoid valve 12a, exhaust solenoid valve 12b, pressure sensor 12c, air circuit bottom plate 12d, outer casing 13, main valve 2, pilot valve interface 2a , right control chamber 2b, v...

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Abstract

The invention relates to a pilot-operated type proportional flow valve with a position and flow composite feedback function. The pilot-operated type proportional flow valve comprises a pilot-operatedvalve and a main valve, the pilot-operated valve comprises a controller and a pilot-operated valve module, and the main valve comprises a valve body, a valve element, a left end cover, a right end cover and a spring; a pilot valve control port of the pilot valve is communicated with a main valve control port of the main valve, the main valve control port of the main valve is communicated with a right control cavity of the main valve, the main valve is provided with a thermal flow sensor for measuring flow of a working port, and a displacement sensor for measuring displacement of the valve element is arranged in the main valve; a first nonlinear characteristic relationship is formed between the pressure of the pilot valve control port and an input signal, a linear relationship is formed between the pressure of the main valve control port and the opening degree of a valve port, and a second nonlinear characteristic relationship is formed between the opening degree of the valve port andthe output gas flow; and the output gas flow and the input signal are correctied to form a linear relation, and a numerical value is solidified into a controller. The device has the advantages of being suitable for gas flow control, high in control precision, good in stability and high in response speed.

Description

technical field [0001] The invention relates to the technical field of gas flow control, in particular to a pilot-operated proportional flow valve with combined position and flow feedback functions. Background technique [0002] The flow rate of fluid (gas and liquid), when the external conditions (pressure and temperature, etc.) are constant, is generally related to the size of the cross-section of the space through which the fluid flows. For a specific flow valve, it is to control the opening of the valve port to realize the output of the required flow value. [0003] The so-called proportional flow valve means that the flow output of a control valve has a linear relationship with the value of the input signal (current or voltage) applied. The so-called pilot control valve means that the movement of the spool of the main valve is controlled by the output pressure of the pilot valve. [0004] The pilot valve is generally a miniature direct-acting proportional pressure val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K37/00F16K31/40
CPCF16K31/40F16K37/0083F16K37/0091
Inventor 曹建波章锋蒋佑华周志威顾高峰
Owner XINGYU ELECTRON NINGBO CO LTD
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