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Safety valve position feedback module

An intrinsically safe, valve position feedback technology, used in valve devices, engine components, mechanical equipment, etc., can solve the problems of incompatibility, long purchase cycle, and high cost of imported intrinsically safe feedback modules, achieving compact circuit structure. , improve load efficiency, improve the effect of anti-interference

Active Publication Date: 2011-04-20
ZHONGHUAN TIG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional non-intrinsically safe electric valve positioner cannot be in line with the international advanced automation instrument technology, nor can it meet the needs of the domestic market; the non-intrinsically safe valve position feedback module equipped with the traditional electric valve positioner cannot be fully integrated The intelligent intrinsically safe valve electric positioner is used together, and the imported intrinsically safe feedback module used in conjunction with the intelligent intrinsically safe electric valve positioner is expensive, and the purchase cycle is very long, which is far from satisfying the low cost, high quality and high accuracy of the domestic market. needs

Method used

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Examples

Experimental program
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Embodiment Construction

[0008] Such as figure 1 As shown, the intrinsically safe valve position feedback module includes connectors, inductance coils, NOT gate circuits, RC filters for regulated power supplies, transmitters, power amplifiers, overvoltage protection circuits, and wiring terminals. The connectors pass through the inductance coils The NAND gate circuit, RC filter, transmitter, power amplifier, overvoltage protection circuit, and terminal are connected in sequence, the RC filter is connected with the NOT gate circuit to form a loop circuit, and the terminal outputs a two-wire 4-20mA signal.

[0009] Such as figure 2 As shown, the 1KHZ square wave signal transmitted from the external intelligent valve positioner; input to the inductance coil of the intrinsically safe module through the connector; isolated and amplified by the inductance coil; input to the NOT gate circuit, the power supply voltage of the NOT gate circuit It is the DC stable voltage output from the 4-20mA transmitter...

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Abstract

The invention relates to a safety valve position feedback module, which comprises a connector, an inductance coil, an inverter circuit, a voltage-stabilized power source, a RC filter, a transmitter, a power amplifier, an overvoltage protection circuit and a connecting terminal, wherein the connector is connected to the inverter circuit, the RC filter, the transmitter, the power amplifier, the overvoltage protection circuit and the connecting terminal through the inductance coil in sequence; the RC filter and the inverter circuit are connected into a loop circuit; and the connecting terminal is used for outputting a two-wire 4-20mA signal. The invention has the advantages of amplifying an input signal voltage, efficiently restraining a high-frequency interference signal, increasing anti-interference property of the whole circuit, and sealing the energy released by capacitor so as to prevent explosion caused by the externally released energy.

Description

technical field [0001] The invention relates to an intrinsically safe valve position feedback module used in conjunction with an intelligent intrinsically safe Siemens electric valve positioner and a domestic intelligent intrinsically safe electric valve positioner. technical background [0002] With the continuous improvement of my country's industrial automation level and the rapid development of intelligent technology and intelligent instruments, instrumentation technology requires a continuous improvement in the level of humanization and safety. The traditional non-intrinsically safe electric valve positioner cannot be in line with the international advanced automation instrument technology, nor can it meet the needs of the domestic market; the non-intrinsically safe valve position feedback module equipped with the traditional electric valve positioner cannot be fully integrated The intelligent intrinsically safe valve electric positioner is used together, and the import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K37/00
Inventor 白春娥
Owner ZHONGHUAN TIG
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