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Axial-flow type safety block valve and overpressure cut-off control system thereof

A control system, axial flow technology, applied in the direction of safety valve, balance valve, valve device, etc., to achieve the effect of enhanced safety, low noise and large flow capacity

Pending Publication Date: 2018-10-30
四川长仪油气集输设备股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially suitable for large-flow transportation occasions such as long-distance natural gas pipelines and distribution stations

Method used

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  • Axial-flow type safety block valve and overpressure cut-off control system thereof
  • Axial-flow type safety block valve and overpressure cut-off control system thereof
  • Axial-flow type safety block valve and overpressure cut-off control system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] As a preferred embodiment of the application, refer to the attached figure 1 and 2 , this example discloses:

[0034] Axial flow safety cut-off valve, including left valve body 7, right valve body, valve seat 6, valve core 5, valve stem 4, valve core sleeve 1, piston sleeve 14 and piston 16, the right valve body includes Cover 17 and right valve body jacket 13; said spool 5, valve stem 4 and piston 16 constitute a power transmission mechanism; said left valve body 7, valve seat 6 and spool 5 constitute an inlet space 3; said spool 5 Slidingly connected in the valve core sleeve 1, the valve core 5 and the inner side of the valve core sleeve 1 form a left space 8, the right side of the valve core sleeve 1, the inner side of the piston sleeve 14 and the left side of the piston 16 form a damping space 9, and the damping The space 9 is provided with a return spring 10; the piston sleeve 14 is provided with a breathing hole 19, and the breathing hole 19 communicates the dam...

Embodiment 2

[0037] As another preferred embodiment of the present application, refer to the attached image 3 and 4 , this example discloses:

[0038] The overpressure cut-off control system of the axial-flow safety cut-off valve includes an axial-flow safety cut-off valve and several overpressure control valves 21; in this embodiment, according to the number of overpressure control valves 21, the overpressure cut-off control system can be Divided into a single overpressure cut-off method and a multi-stage overpressure cut-off method.

[0039] Such as image 3 As shown, the number of the overpressure control valve 21 is one, and the outlet of the overpressure control valve 21 communicates with the right space 15 of the axial flow safety shut-off valve, that is, the overpressure control valve is installed on the axial flow safety shutoff valve. At the interface of the instrument; the inlet of the overpressure control valve is connected with the downstream outlet pipeline. Typically the...

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Abstract

The invention discloses an axial-flow type safety block valve and an overpressure cut-off control system thereof. The axial-flow type safety block valve comprises a left valve body, a right valve body, a valve seat, a valve element, a valve rod, a valve element sleeve, a piston sleeve and a piston. Inlet space is formed by the left valve body, the valve seat and the valve element. The valve element is arranged in the valve element sleeve in a sliding connection manner. Left space is formed by the valve element and the inner side of the valve element sleeve. Damping space is formed by the rightside of the valve element sleeve, the inner side of the piston sleeve and the left side of the piston. A reset spring is arranged in the damping space. Right space is formed by the piston sleeve, thepiston and the left side of an inner sleeve of the right valve body. A signal medium hole is formed in the piston sleeve. The right space communicates with an outlet of an overpressure control valvethrough the signal medium hole. The axial-flow type safety block valve needs no external energy sources when in work, and carries out automatic cutting by utilizing the natural pressure energy of media. The axial-flow type safety block valve is low in pressure loss, high in flow capacity and low in noise when in work, has the functions of single overpressure cutting, multi-level overpressure cutting, remote control and the like, and is especially suitable for high-flow conveying occasions of natural gas long-distance transport pipelines, gas distributing stations and the like.

Description

technical field [0001] The invention relates to the technical field of gas valves, in particular to an axial-flow safety cut-off valve and an overpressure cut-off control system thereof. Background technique [0002] A typical pressure control system of a gas transmission and distribution station is mainly composed of a safety shut-off valve, a monitoring pressure regulator and a working flow (pressure) regulating valve. The outlet of the safety shut-off valve is connected to the pre-valve pipeline of the monitoring pressure regulator through a flange. The control valve of the safety cut-off valve is connected to the pipe behind the valve of the working flow regulating valve through the pressure signal pipe, receives the downstream feedback control pressure signal, controls the opening and closing of the safety cut-off valve, and controls the downstream pressure within the set range , to ensure normal downstream pipeline gas supply pressure and gas safety delivery. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/00
CPCF16K17/00
Inventor 王元清魏连康张月伟
Owner 四川长仪油气集输设备股份有限公司
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