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Self-operated axial flow pressure regulating valve fully open in case of failure

A failure, self-operated technology, applied in the field of pressure regulating valves, can solve the problems of equipment shutdown and the inability to predict and judge the damage degree of the working pressure regulating valve, and achieve the effect of reducing investment cost, low manufacturing cost and stable performance.

Inactive Publication Date: 2011-12-07
BEST ENERGY EQUIP TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working pressure regulating valve of this kind of structure cannot predict the occurrence of the above-mentioned faults and judge the degree of damage, so it often causes equipment stoppage accidents, which leads to the safety of pipeline transportation of natural gas.

Method used

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  • Self-operated axial flow pressure regulating valve fully open in case of failure
  • Self-operated axial flow pressure regulating valve fully open in case of failure
  • Self-operated axial flow pressure regulating valve fully open in case of failure

Examples

Experimental program
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Effect test

Embodiment Construction

[0010] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. As shown in the figure, a self-operated axial flow pressure regulating valve that fully opens in case of failure includes a valve body 9 with an inlet 1 before pressure regulation and an outlet 5 after pressure regulation, a valve core 2, a membrane 3, an opening spring 4, The position sensor 6, the control indicators 7 and 8 are pressure-taking nozzles, and the opening spring of the inner chamber of the valve is placed at the rear of the membrane diaphragm.

[0011] Such as figure 2 As shown, 1-1 safety emergency shut-off valve, 1-2 sampling pipe (pressure pipe), 1-3 front pilot, 1-4 control pilot, 1-5 failure-closed self-operated axial flow pressure regulating valve (monitoring), 1-6 front (pilot) 1-7 control pilot 1-8 failure open type self-operated axial flow pressure regulating valve. The self-oper...

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Abstract

The invention relates to a self-operated axial-flow pressure regulating valve that can be fully opened when a failure occurs, including a valve body with an inlet before pressure regulation and an outlet after pressure regulation, a valve core, a film, an opening spring, a position sensor, a preposition and a control command The device and the pressure-taking nozzle are characterized in that: the opening spring of the inner cavity of the valve is placed at the rear of the membrane diaphragm. Beneficial effects: the opening spring in the main valve body is arranged at the rear of the main diaphragm of the film, which can realize that when the main diaphragm of the pressure regulating valve is broken or damaged or the control pilot (pilot valve) is damaged and the load control pressure is lost, the pressure regulating valve valve The core uses the force of the opening spring to open the pressure regulating valve and maintain the fully open state, and at the same time the sensor sends out an alarm signal to remind the user of the function of timely maintenance.

Description

technical field [0001] The invention belongs to a pressure regulating valve of a pressure control system of a natural gas transmission station, and in particular relates to a self-operated axial flow pressure regulating valve which is fully opened when a fault occurs. Background technique [0002] The pressure control system of the natural gas transmission station is mainly composed of a safety cut-off valve, a monitoring pressure regulating valve and a working pressure regulating valve. The valve body of the working pressure regulating valve is connected to the pipeline behind the monitoring pressure regulating valve through a flange. The front and control pilot (pilot valve) is connected to the pipeline after the working pressure regulation through the pressure signal conduit, receives the downstream feedback control pressure, controls the valve port opening of the pressure regulating valve, and controls the downstream pressure within the set range In order to achieve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/22F16K37/00
Inventor 李东明
Owner BEST ENERGY EQUIP TIANJIN
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