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Anti-jamming and anti-freezing control device and control method of electric regulating valve

A technology for electric regulating valves and control devices, applied in the direction of valve devices, valve operation/release devices, valve details, etc., can solve problems that have not been solved well, achieve low cost, ensure reliability, and overall structural design ingenious effect

Active Publication Date: 2018-10-16
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Those skilled in the art try to solve this solution, but this problem has not been well resolved

Method used

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  • Anti-jamming and anti-freezing control device and control method of electric regulating valve
  • Anti-jamming and anti-freezing control device and control method of electric regulating valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: see figure 1 , an anti-jamming and anti-freezing control device for an electric regulating valve, the device includes an actuator 1, an actuator connecting rod 2, a valve core action connector 3, a communication module 4, a valve connecting rod 5, an electric isolation door 6, and a valve 7 , an electric isolation door 10, a proximity switch 11, a proximity switch 12 and an actuator terminal box 13, the actuator 1 and the valve 7 at the bottom form an electric regulating valve, and the actuator 1 and the valve 7 are connected through the actuator The connecting rod 2 and the valve connecting rod 5 are rigidly connected by the Unicom module 4, so that the action of the electric actuator can drive the action of the valve core below. Switch 12,11; Proximity switch is installed through the wire hole, to strengthen fixation, can not shake; Actuator terminal 13 is installed on the side above the actuator.

Embodiment 2

[0014] Example 2: see figure 1 , as an improvement of the present invention, the device also includes an electric heating cover 8 and a power terminal box 9, an electric heating cover 8 is installed around the connecting piece of the regulating valve spool, and the electric heating cover power terminal box 9 is installed at the bottom . This technical solution uses an electric heating cover to continuously heat the valve core of the regulating valve when it is vulnerable to freezing, so as to ensure the action of the valve;

Embodiment 3

[0015] Embodiment 3: see figure 1 , as an improvement of the present invention, the device further includes electric isolation valves 6, 10, and electric isolation valves 6, 10 are respectively provided at the front and rear ends of the electric control valve.

[0016] How it works: see figure 1 , figure 2 , during the normal operation of the electric regulating valve, the DCS outputs an analog signal to directly control the switching action of the regulating valve to meet the requirements of the process production. The opening limit is 5%, and the opening limit acts between the two proximity switches. The medium flow allowed by the opening is based on not affecting production. The timer sets the switch value output interval to 60 seconds, that is, the interval between the open command and the close command For 60 seconds, the jog command is repeatedly output in a loop to realize the closed-loop control of the online action reliability test of the electric control valve. T...

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PUM

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Abstract

The invention relates to an anti-jamming and anti-freezing control device of an electric regulating valve. The anti-jamming and anti-freezing control device comprises an executing mechanism, an executing mechanism connecting rod, a valve element action connecting piece, a communicating module, a valve connecting rod, electric isolation doors, a valve, an electric isolation door, proximity switchesand an executing mechanism wiring terminal box, wherein the executing mechanism and the valve at the bottom end form the electric adjusting valve, the connecting part of the executing mechanism and the valve is in rigid connection with the valve through the connecting rod of the executing mechanism and the valve, the upper proximity switch and the lower proximity switch are additionally arrangedon one side of the valve element action connecting piece of the regulating valve, and an executing mechanism wiring terminal 13 is installed on one side above the executing mechanism. By the adoptionof the switching value signal output by a timing controller, the small-stepping-point dynamic control of a switching-over door is realized, the operation reliability of the regulating valve or a standby regulating valve in extreme weather is guaranteed, and stable production and operation are ensured.

Description

technical field [0001] The invention relates to a control device, in particular to an anti-jamming and anti-freezing control device for an electric regulating valve, which belongs to the technical field of electric instrument control. Background technique [0002] The electric regulating valve is an important equipment for medium circulation and control in the production process of industrial and mining enterprises. For example, boiler feed water and desuperheating water regulating gates are generally equipped with two-way adjustment, one main loop adjustment, one secondary loop adjustment, and the operating personnel are generally separated by a period of time. The main and auxiliary loops are adjusted and switched at time. When one of them is running, the other is on standby, especially in extreme weather below zero in winter, because the valve core has a small amount of medium leakage, especially the medium with water and steam, and the standby adjustment door does not ope...

Claims

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Application Information

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IPC IPC(8): F16K31/04F16K37/00
CPCF16K31/04F16K37/0041
Inventor 成涛
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD