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Check valve

A check valve, valve body technology, applied in the direction of control valve, valve device, functional valve type, etc., can solve the problems of long maintenance cycle, high required life, outstanding reliability, etc., to achieve low cost, long life, and easy operation. Convenient and fast effects

Inactive Publication Date: 2017-05-31
SUZHOU DOUSON DRILLING & PRODION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Subsea control manifolds, production manifolds and central manifolds all need to use check valves. Existing land check valves cannot meet the operating conditions of the seabed, requiring high service life, outstanding reliability, and long maintenance cycles.

Method used

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Embodiment Construction

[0013] In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

[0014] Such as Figure 1-3 As shown, the present invention is a check valve, including a valve body assembly 1, a rocker assembly 15 and a valve stem 17, and the valve body assembly 1 includes a valve body, lifting lugs and a valve seat, and the valve seat is connected to the valve seat. The valve body is connected by butt welding, which can effectively prevent internal leakage of the valve and prevent the valve seat from coming out. The lifting lug is welded on the valve body, and the rocker assembly 15 includes a valve disc and a rocker. Installed in the through hole of the rocker, install the gasket, tighten with the nut, and the cotter pin penetrates to prevent l...

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PUM

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Abstract

Then invention relates to a check valve comprising a valve body assembly, a rocker assembly and a valve rod. A rod sealing assembly is arranged in a sealing groove of the valve body assembly. A first O-shaped ring is arranged between a sealing sleeve and the valve rod. After the rocker assembly is positioned, a key is installed in a rocker key groove of the rocker assembly through a spring. A bearing is installed on the valve rod. The valve rod is inserted into the valve body assembly through the rod sealing assembly and the sealing sleeve, and a key groove in the valve rod is matched with the key on the rocker assembly. A pressing cap is installed in a thread of the valve body assembly, and a first bearing is installed in the pressing cap. A first sealing sleeve is arranged on one side of the pressing cap. The stretching end of the valve rod is connected with a ROV connector. A second pressing cap is arranged in a channel of the valve body assembly. A sealing assembly is installed on the second pressing cap. A three-opening ring is installed above the second pressing cap, and a valve cover is arranged above the three-opening ring. The problem of the backflow of manifold fluid in the sea bottom is solved. The valve is low in cost, simple in structure, convenient to operate and long in service life, and the sea bottom using requirement is met.

Description

technical field [0001] The invention relates to a check valve, in particular to an underwater check valve for deep sea water. Background technique [0002] Check valves are used in pipelines in petroleum, chemical and other industries to cut off the fluid in the pipeline. Submarine control manifolds, production manifolds and central manifolds all need to use check valves. The existing land check valves cannot meet the working conditions of the seabed, and require high service life, outstanding reliability, and long maintenance cycles. Contents of the invention [0003] In order to solve the above technical problems, the object of the present invention is to provide a non-return valve, which can save labor cost, has high safety, high efficiency and is simple and easy to operate. [0004] In order to achieve the above technical purpose, the present invention is achieved through the following technical solutions: [0005] The invention relates to a check valve, which includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/06
CPCF16K15/063
Inventor 谈平周明赵峰李莹莹陈宁庄会涛
Owner SUZHOU DOUSON DRILLING & PRODION EQUIP
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