Automatic reset closing cut-off valve

An automatic reset and cut-off valve technology, which is applied in the direction of safety valves, balance valves, valve devices, etc., can solve the problems of complex structure of cut-off valves, inconvenient disassembly, and high maintenance costs, so as to save closing torque, avoid abnormal damage, and reduce production costs. low effect

Pending Publication Date: 2017-11-17
四川固特阀门制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The automatic cut-off valve is not only easy to operate, but also can be closed in time when the pipeline breaks unexpectedly, saving energy and preventing accidents. The control part and other controls, the production cost is high, and it is inconvenient to disassemble

Method used

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  • Automatic reset closing cut-off valve
  • Automatic reset closing cut-off valve
  • Automatic reset closing cut-off valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In order to achieve the above object, the technical scheme adopted in the present invention is:

[0040] Such as Figure 1-Figure 5 As shown in the figure, an automatic reset shut-off shut-off valve includes a valve body 1, and the two ends of the valve body 1 are provided with inlet and outlet sockets. The upper part of the valve body 1 is provided with a valve cover 5, and the lower part is provided with a bottom cover 6. The valve body 1 is provided with a cut-off device, which includes a valve disc 3 and a valve seat 2. The upper part of the valve disc 3 is connected with the valve stem 4, and the valve disc 3 Positioning column 31 is arranged below, elastic part 7 is arranged on the outside of valve flap 3, and circular boss 61 is arranged on bottom cover 6, and elastic part 7 is fixed by circular boss 61, and the middle part of circular boss 61 is provided with blind. hole 62 , the positioning column 31 can move up and down in the blind hole 62 .

[0041] The fu...

Embodiment 2

[0064] An automatic reset shut-off shut-off valve is different from embodiment 1 in that the outer circle of the valve seat 2 is provided with a strip-shaped flow hole.

Embodiment 3

[0066] An automatic reset shut-off valve, the difference from Embodiment 1 is that the valve seat 2 is set on the valve body 1, and steps are provided on the valve seat 2 and the valve body 1, and the end of the step is provided with a gasket I8 and a gasket II9, the valve seat 2 is connected with the valve body 1 through the valve cover 5, and the valve seat 2 is provided with a lower sealing surface 22 of the valve seat and an upper sealing surface 21 of the valve seat.

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PUM

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Abstract

The invention discloses an automatic reset closing cut-off valve. A cut-off device is arranged in a valve body and comprises a valve clack and a valve base, the upper portion of the valve clack is connected with a valve rod, a positioning column is arranged below the valve clack, an elastic component is arranged outside the valve clack, a round boss is arranged on a bottom cover, the elastic component is fixed through the round boss, a blind hole is formed in the middle of the round boss, the positioning column can vertically move in the blind hole, through recovery force of a spring, the valve clack is reset, the medium pressure is used for providing seal force needed by closing of the valve, external closing torque is saved, and energy saving and consumption reduction effects are achieved; two inverted upper seals are added, the fluid can be prevented from entering a padding cavity after the valve is opened or closed, the padding is protected against medium damage, the service life of the valve is effectively prolonged, external leakage of the valve is avoided, the valve seal face is downward, particles in media cannot be accumulated on the seal face, and the service life of the valve can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of fluid control valves, in particular to an automatic reset shut-off shut-off valve. Background technique [0002] With the rapid development of petroleum, chemical and gas industries, especially the wide application of liquefied natural gas (LNG) as a new energy source, the demand for ultra-low temperature valves has increased rapidly. Since the temperature of LNG under normal pressure is -162°C, it is not only extremely cold, but also flammable and explosive, so higher and stricter requirements are put forward for the low temperature sealing performance of the valve. [0003] In addition, in the working environment of low-temperature or ultra-low temperature media such as liquid oxygen, liquid nitrogen, liquid argon, and liquefied natural gas, the temperature is usually in the low-temperature region of -196°C to 0°C, and the low-temperature deformation is large, which has a great impact on the erosion and...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F16K17/04
CPCF16K17/04
Inventor陈顺强雷文平杨杰陈兴安
Owner四川固特阀门制造有限公司