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Novel low-pressure triggering pressure lever instability shut-off valve

A low-pressure trigger and shut-off valve technology, which is applied in wellbore/well valve devices, wellbore/well parts, earthwork drilling and production, etc., can solve the problem of decreased reliability of the shut-off valve system, many moving parts of the shut-off valve, There are many connection joints, etc., to achieve the effects of high motion reliability and sealing reliability, simple structure, and high trigger accuracy

Inactive Publication Date: 2013-12-25
JIANGSU RELIABLE MECHANICAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the connecting pipelines between the components are long and there are many connecting joints, which significantly increases the potential leakage points.
In addition, the traditional shut-off valve itself has many moving parts
These factors will cause the reliability of the entire shut-off valve system to decline

Method used

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  • Novel low-pressure triggering pressure lever instability shut-off valve
  • Novel low-pressure triggering pressure lever instability shut-off valve
  • Novel low-pressure triggering pressure lever instability shut-off valve

Examples

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Embodiment Construction

[0017] A new type of low-pressure trigger type pressure bar instability shut-off valve, its main components include valve body 1, valve seat 2, valve disc 3, rotating shaft 4, valve disc retainer 5, valve cover 6, valve stem 7, spring 8, Piston 9, cylinder 10, slender rod 11, rod cage 12, rod cap 13, reset bolt 14 and reset strut 15. like figure 1 shown. Wherein the slender rod 11 and the spring 8 are the trigger components of the novel low-pressure trigger type pressure rod instability shut-off valve.

[0018] The specific embodiment of the present invention is: the upper end of the valve rod 7 is connected with the elongated rod 11, and the valve rod 7 enters the valve body 1 through the cylinder 10, the piston 9, the spring 8 and the valve cover 6. The valve stem 7 has a central hole that connects the valve body 1 with the cylinder 10 . The pressure of the medium inside the valve body 1 will enter the inner cavity of the cylinder 10 through the center hole of the valve st...

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Abstract

The invention relates to a novel low-pressure triggering pressure lever instability shut-off valve, which comprises the following main components: a valve body, a valve seat, a valve clack, a rotating shaft, a valve cover, a valve rod, a spring, a piston, an air cylinder, a slender rod, a rod cage, a rod cap and the like, wherein the slender rod is a triggering component for shutting off a valve, and is designed according to the principle of pressure lever instability. When the pressure in a pipeline is higher than a specified point, a supporting force borne by the slender rod is lower than the pressure lever instability critical load of the slender rod, a pressure lever is kept stable, a valve clack catch is clamped at the lower end of the valve rod, and the valve is kept to be in the open state. When the pressure in the pipeline is lower than the specified point, the axial load borne by the slender rod exceeds the pressure lever instability critical load of the slender rod, the pressure lever is instable, the effective length of the pressure lever is instantaneously reduced, and at the moment, the valve clack catch is separated from the lower end of the valve rod, the valve clack rotates around the rotating shaft under the action of gravity, and the valve is closed under the push of fluid. The valve is simple in structure, is only provided with three moving components, and is very higher in reliability.

Description

technical field [0001] The invention relates to a novel low-pressure trigger pressure rod instability shut-off valve for ensuring the safety and protection of station equipment or gas pipelines in natural gas production and transportation well sites. Background technique [0002] A low-pressure triggered wellhead safety shut-off valve to control the output of natural gas is installed on the ground of the natural gas production and transportation well site. This is because the failure or fracture of downstream pipelines, valves or equipment will cause the pressure of the pipeline to drop. In this case, the natural gas will be discharged into the atmosphere, which will not only pollute the atmosphere, but also cause fire and explosion hazards, and cause economic losses. . The function of this safety shut-off valve is to close the natural gas passage when the pipeline pressure drops to a certain value, thereby reducing the leakage of natural gas, reducing air pollution, fire h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/02
Inventor 刘海亮王磊王福凯
Owner JIANGSU RELIABLE MECHANICAL EQUIP CO LTD
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