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Novel flange gate valve and sealing structure for packing ring of novel flange gate valve

A technology of flanged gate valve and sealing structure, which is applied in the direction of shaft sealing, sliding valve, valve details, etc., can solve the problems of high cost, non-recoverable deformation, unfavorable sealing, etc., and achieve the goal of reducing cost, reducing sealing effect and increasing sealing performance Effect

Inactive Publication Date: 2017-05-03
TIANJIN KAIYUAN THIRD VALVE
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  • Description
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AI Technical Summary

Problems solved by technology

[0004] The packing ring of the existing flanged gate valve generally adopts a completed graphite sleeve ring. The graphite sleeve has good lubricity, but its cost is relatively high. Unfavorable, the application finds a sealing structure that can solve the above-mentioned solution, solves these problems

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  • Novel flange gate valve and sealing structure for packing ring of novel flange gate valve
  • Novel flange gate valve and sealing structure for packing ring of novel flange gate valve

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot sequentially limit the protection scope of the present invention.

[0019] A new type of sealing structure for the packing ring of a flanged gate valve. The packing ring is filled in the stuffing box seal between the packing gland and the valve cover. The structure of the packing ring is: starting from the lower end surface of the packing The outer edge is coaxially installed with rubber sealing sleeve 1-1, O-shaped sealing rubber ring 1-2, PTFE pad 1-3, O-shaped sealing rubber ring 1-4, for the convenience of installation, on the lower end surface of the rubber sealing sleeve An O-shaped sealing rubber ring embedding groove is formed, and the adjacent O-shaped sealing rubber ring 1-2 is embedded in the groove, which can increase the sealing performance o...

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Abstract

The invention relates to a novel flange gate valve and a sealing structure for a packing ring of the novel flange gate valve. A rubber sealing sleeve, an O-shaped sealing rubber ring, a fluorine pad and an O-shaped sealing rubber ring are sequentially and coaxially installed at the outer edge of a valve rod from the lower end face of a packing gland. An O-shaped sealing rubber ring embedded groove is formed in the lower end face of the rubber sealing sleeve, and the adjacent O-shaped sealing rubber rings are embedded in the groove. According to the sealing structure for the packing ring of the novel flange gate valve, the circle of fluorine pad is additionally arranged on the two layers of O-shaped sealing rubber rings, hardness of the fluorine pad is high so that the fluorine pad can play a supporting effect on the O-shaped sealing rubber rings which are distributed in an up-and-down manner, torsion deformation of the O-shaped sealing rubber rings due to the valve rod is prevented, and the sealing effect is reduced; and meanwhile, the fluorine pad has a good sealing effect, and the sealing performance of the whole sealing mechanism is improved.

Description

technical field [0001] The invention belongs to the field of valves, and relates to a novel flange gate valve and a sealing structure of a packing ring thereof. Background technique [0002] Flanged gate valve is a gate valve with flange connection, which is the most common connection method. Flange gate valves are stable and reliable when used in pipelines, so flange gate valves are often used in high-pressure pipelines. The movement direction of the flanged gate valve is perpendicular to the direction of the fluid, and the gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces, and the two sealing surfaces of the most commonly used pattern gate valve form a wedge shape, and the wedge angle varies with the valve parameters, usually 50°. The gate of the wedge gate valve can be made into a whole, which is called a rigid gate; it can also be made into a gate that can produce a small amount of deformation t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/12F16K41/02
CPCF16K3/12F16K41/02
Inventor 朱德才
Owner TIANJIN KAIYUAN THIRD VALVE
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