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Switch circuit

A switching circuit, gate circuit technology, applied in circuits, electronic switches, relays, etc., can solve the problems of high price and can not meet the signal switching circuit, etc., to achieve low cost, expand the scope of use, and improve the effect of efficiency

Inactive Publication Date: 2011-03-30
TIANJIN JINGTONG CONTROL INSTR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The price of similar products imported from Japan is very high, which is far from meeting the domestic market's demand for low-cost and high-quality signal-off switching circuits.

Method used

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Embodiment Construction

[0012] Such as figure 1 , 2 A 220V AC switching circuit is shown, including a positioner and a solenoid valve, and also includes a power circuit, a comparator circuit, a gate circuit, a power amplifier, a trigger circuit, an output circuit and a connector, and the power circuit is connected with the comparator circuit and the gate circuit respectively , the power amplifier and the trigger circuit are connected, the comparator circuit is sequentially connected with the gate circuit, the power amplifier, the trigger circuit, the output circuit and the connector, and the connector is respectively connected with the power circuit, the comparator circuit, the positioner and the solenoid valve.

[0013] The comparator circuit includes: resistors R1~R5, R7, R0, potentiometer RW, capacitor C9, diodes D1, D2, D5 and operational amplifier IC1, where resistor R1, capacitor C9, and diode D5 are connected in parallel, one end is grounded, and the other end passes through the resistor R4 i...

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PUM

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Abstract

The invention relates to a switching circuit used by matching with a pneumatic actuator, including a localizer and a solenoid valve, furthermore including a power circuit, a comparator circuit, a gate circuit, a power amplifier, a trigger circuit, an output circuit and a connector, wherein the power circuit is respectively connected with the comparator circuit, the gate circuit, the power amplifier and the trigger circuit, and the comparator circuit is connected with the gate circuit, the power amplifier, the trigger circuit, the output circuit and the connector in turn; the connector is respectively connected with the power circuit, the comparator circuit, the localizer and the solenoid valve. The invention has the beneficial effect of advancing the interference immunity and the dependability of the circuits, saving the power, prolonging the service life of the circuit. The invention is used by matching with the electropneumatic valve positioner, the intelligent valve localizer, the pneumatic actuator, which realizes the continuous operation of the actuator at the 4-20 mA of the instruction; when lower than 4 mA or signal breaking and switching out, the actuator reliably realizesthe safeguard function, which satisfies the requirement of the signal breaking signal switch circuit of high quality and low cost at home and abroad.

Description

[0001] technology [0002] The invention relates to a control circuit, in particular to a switch circuit matched with a pneumatic actuator. Background technique [0003] With the continuous improvement of my country's industrial automation level, and the requirements of industrial and mining enterprises for high-quality, high-level, and strict production processes, it is necessary for the pneumatic actuator to maintain the original working state when the signal is off, the signal is low, and the power is off. , At present, there is a great demand for switching circuits in the domestic market, but there are no similar products with high reliability and high quality in China. The price of imported Japanese similar products is very high, which is far from meeting the domestic market's demand for low-cost and high-quality signal-off switching circuits. Contents of the invention [0004] In view of the problems existing in the prior art, the present invention provides a switch ci...

Claims

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Application Information

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IPC IPC(8): H03K17/79H01H47/32H03K17/60
Inventor 白春娥王静
Owner TIANJIN JINGTONG CONTROL INSTR TECH