A Two-Position Self-Holding Electric/Pneumatic Valve Actuator Stage Based on Foxboro System

A pneumatic valve and drive stage technology, applied in the field of communication, can solve the problems such as the loss of protection of the interlock signal

Active Publication Date: 2022-03-11
HUANENG CHAOHU POWER GENERATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most electric / pneumatic / hydraulic valves used in thermal power plants adopt manual start-stop and interlock start-stop dual-operation control. Most of these valves use solenoid valves or electric actuators to realize the control switch function to solve The problem that the valve can still be operated when the interlock open and close signals exist, making the interlock signal lose its protective effect

Method used

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  • A Two-Position Self-Holding Electric/Pneumatic Valve Actuator Stage Based on Foxboro System
  • A Two-Position Self-Holding Electric/Pneumatic Valve Actuator Stage Based on Foxboro System
  • A Two-Position Self-Holding Electric/Pneumatic Valve Actuator Stage Based on Foxboro System

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0030] As shown in the background art, there is a problem that the valve can still be operated when the interlock open and close signals exist in the prior art, so that the interlock signal loses its protective effect, thereby reducing the safety of the system during use.

[0031] In order to solve the above problems, the embodiment of the present application is applied to the logic control of the DCS system in the industrial production site, which is an improved method with simple s...

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Abstract

The invention discloses a two-position self-holding electric / pneumatic valve drive stage based on the FOXBORO system, which is applied to touch panels, drive stages, DO cards, DI cards, and on-site equipment. It is characterized in that the method includes: According to the signal output by the driver stage, the switch control signal of the DO card is generated, and the switch control signal of the DO card is sent to the DI card; when the driver stage receives the signal of the DI card and cannot be controlled within a preset time For the local equipment, the local equipment is in a fault state, so the fault state is displayed based on the touch panel. The above method can solve the problem that the valve can still be operated when the interlock open and close signals exist, so that the interlock signal loses its protective effect, thereby improving the safety of the system during use.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a two-position belt self-holding electric / pneumatic valve driving stage based on the FOXBORO system. Background technique [0002] The Foxboro system includes high-speed controllers, field device management tools, maintenance response centers, enterprise historical databases, multi-layer redundancy and network security hardening systems. The system's ability to provide superior visibility into historical data, as well as real-time and predictable operational information, helps users increase productivity. At present, most electric / pneumatic / hydraulic valves used in thermal power plants adopt manual start-stop and interlock start-stop dual-operation control. Most of these valves use solenoid valves or electric actuators to realize the control switch function to solve The valve can still be operated when the interlock open and close signals exist, which makes the interlock s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/04F16K31/122
CPCF16K31/04F16K31/122
Inventor 陆爱行李伟
Owner HUANENG CHAOHU POWER GENERATION
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