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Flat gate valve

A flat gate valve and valve seat technology, applied in sliding valves, valve devices, engine components, etc., can solve the problems of leakage accidents, insufficient sealing between the valve seat and the valve body, etc., to reduce leakage accidents, simple structure and strong sealing Effect

Active Publication Date: 2016-11-23
US DIAMOND OIL DRILLING SYST ENG (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in actual operation, the valve seat not only needs to limit the rotation of the valve plate, but also needs to rub against the valve plate for a long time, which will easily cause insufficient sealing between the valve seat and the valve body, resulting in leakage accidents

Method used

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  • Flat gate valve

Examples

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Embodiment Construction

[0022] Such as figure 1 As shown, the slab gate valve of this embodiment includes a valve body 1, a valve stem 2, a valve seat 3 that is sealed with the channel openings 10 on both sides of the valve body 1, is located between the valve seats 3 on both sides and is arranged on the valve body. The valve plate 4 on the rod 2, and the driving mechanism 5 for driving the valve rod 2 to rotate around its own axis so that the valve plate 4 moves up and down to block or open the channel, wherein the valve rod 2 and the valve plate 4 constitute a screw nut structure.

[0023] Specifically, the valve seat 3 includes a seat body 30 with a through hole k communicating with the channel t, an installation groove 31 disposed inside the seat body 30 around its circumference, and arranged in the installation groove 31 so that the valve seat 3 and the channel There is a tightening ring 32 with a tendency to tighten at the junction of the mouth 10.

[0024] Further, the outer circumference of ...

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Abstract

The invention relates to a flat gate valve which comprises a valve body, a valve rod, valve seats arranged at channel openings in the two sides of the interior of the valve body in a sealed manner, a valve plate located between the valve seats on the two sides and arranged on the valve rod, and a driving mechanism used for driving the valve rod to rotate around the axis of the valve rod so as to enable the valve plate to conduct the vertical lifting movement to intercept or open channels. Each valve seat comprises a seat body internally provided with a through hole communicating with the corresponding channel. A screw-nut structure is composed of the valve rod and the valve plate. Particularly, each valve seat further comprises installation grooves which are formed in the seat body and arranged in the circumferential direction of the seat body, and expansion rings arranged in the installation grooves to make the connecting position of the valve seat and the corresponding channel opening tend to be expanded. According to the flat gate valve, due to the arrangement of the expansion rings, the sealing performance between the valve seats and the valve body is high, leakage accidents are reduced, meanwhile, the structure is simple, implementation is convenient, and cost is low.

Description

technical field [0001] The invention relates to a gate valve, in particular to a flat gate valve. Background technique [0002] As we all know, the slab gate valve, as a component used to realize the on-off and flow control of the pipeline system, is widely used in many fields such as oil, natural gas, and water conservancy. [0003] At present, the slab gate valve basically includes a valve body, a valve stem, a valve seat sealed with the passage openings on both sides inside the valve body, a valve plate located between the valve seats on both sides and arranged on the valve stem, and A driving mechanism for driving the valve stem to rotate around its own axis so that the valve plate moves up and down to intercept or open the passage, wherein the valve stem and the valve plate form a screw nut structure, and the two sides of the valve plate They are respectively arranged to be sealed with the end faces of the valve seats on both sides. [0004] However, in actual operati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/20F16K3/316
CPCF16K3/0227F16K3/20F16K3/316
Inventor 徐丽霞张跃进吴平徐诚王海宾
Owner US DIAMOND OIL DRILLING SYST ENG (SHANGHAI) CO LTD
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