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New all-welded flat gate valve

A slab gate valve, fully welded technology, applied to valve details, valve devices, sliding valves, etc., can solve the problems of many leakage points, non-replaceable maintenance, long processing time, etc., to save production costs, avoid rework operations, reduce Effect of Valve Torque

Active Publication Date: 2022-03-29
CHENGDU CHENGFENG VALVE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Commonly used buried slab gate valves for gas pipelines such as petroleum gas and natural gas are generally connected by valve body, valve seat, gate plate, valve stem, valve cover and other parts. The up and down movement of the valve stem drives the gate plate to move up and down. In order to control the opening and closing state of the valve, the valve body and the valve cover are connected by flange gasket + bolt + nut. This connection method has many leakage points, and the valve is bulky and takes a long time to process; the valve seat and the valve body O-shaped rubber sealing rings are used for the seal between the valve stem and the valve cover. Once the valve packing leaks, the valve needs to be disassembled as a whole, and the packing cannot be replaced and maintained online, making maintenance difficult.

Method used

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  • New all-welded flat gate valve
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  • New all-welded flat gate valve

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Embodiment Construction

[0028] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those...

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Abstract

The invention provides a new type of all-welded flat gate valve, which includes a valve body assembly, a valve stem, a gate plate, and a valve seat. Plate, valve cover, the valve seat is installed in the valve seat support, the valve seat support is provided with a flow channel for the medium to flow, the center of the valve cover is provided with a through hole, and a valve stem is arranged in the through hole, so The bottom end of the valve stem is connected with a gate, and the gate controls the opening or closing of the flow channel of the gate valve. The lower sealing plate, the valve seat support, the upper sealing plate and the valve body shell are fixed by welding. The valve cover It is fixed with the upper sealing plate by welding. In the novel all-welded slab gate valve of the present invention, the valve body components are formed by all-welding, so there is no risk of leakage.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a novel fully welded flat gate valve. Background technique [0002] The commonly used buried flat gate valves for gas pipelines such as petroleum gas and natural gas are generally connected by valve body, valve seat, gate, valve stem, valve cover and other parts, and the up and down movement of the gate is driven by the up and down movement of the valve stem. In order to control the opening and closing state of the valve, the valve body and the valve cover are connected by flange gasket + bolt + nut. This connection method has many leakage points, the valve is bulky, and the processing time is long; the valve seat and the valve body are connected with each other. The seal between the valve stem and the valve cover adopts an O-shaped rubber sealing ring. Once the valve packing leaks, the valve needs to be disassembled as a whole, and the packing replacement and maintenance cannot b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K3/02F16K3/20F16K3/32F16K27/04F16K27/08F16K27/10F16K41/02F16K37/00
CPCF16K3/02F16K3/20F16K3/0227F16K3/0263F16K3/32F16K27/044F16K27/10F16K27/08F16K41/02F16K37/0016
Inventor 高阳赵英杰李龙汪涛曾品其童俊
Owner CHENGDU CHENGFENG VALVE