CN201288839Y

CN201288839Y - Metal seal structure of flat gate valve

Info

Publication number: CN201288839Y
Application number: CNU2008201532119U
Authority: CN
Inventors: 陈润福; 卢志刚
Original assignee: SHANGHAI HUHANG VALVES CO Ltd
Current assignee: SHANGHAI HUHANG VALVES CO Ltd
Priority date: 2008-09-18
Filing date: 2008-09-18
Publication date: 2009-08-12
Anticipated expiration: 2018-09-18

Abstract

The utility model relates to the technical field of the stop valve gate valve, in particular to a metal sealing structure of the flat gate valve, characterized in that the lower end of a valve rod is connected with a valve plate having an overflowing hole at the lower end, and two ends of the valve plate are clamped by metal frame sealing rings embedded in two symmetrical valve bases. The utility model has the following beneficial effects: because the lower end of the valve rod is connected with the valve plate having the overflowing hole at the lower end, the high-pressure fluid flows in the lower cavity of the valve body through the overflowing hole with uniform pressure on the two sides of the gate plate when the valve is opened and the pressure of the fluid in the inlet pipeline is higher, in order to reduce the friction between the gate plate and metal frame sealing ring and make the valve opened easily, and when the two ends of the valve plate are clamped by metal frame sealing rings embedded in two symmetrical valve bases, the fluid is capable of flowing bidirectionally and the cavity at the bottom of the valve body is not communicated with the channels at two sides, in order to make the cavity blocked difficultly by the deposits in the fluid, so the leakage is not generated and the sealing effect is good.

Description

The shape metallic leak-proof structure of plate valve

[technical field]

The utility model relates to by the gate valve technical field, especially a kind of shape metallic leak-proof structure of plate valve.

[background technique]

Valve is used for controlling liquid flow size or by being widely adopted connecting on the transfer line, present is to move up and down by the valve rod rotating band movable valve plug that has handwheel by the gate valve control mode, spool wherein is the integrated type flashboard, and it is sealed into one-sided sealing, though it is simple in structure, leak but easily produce in use at the loam cake place of valve rod, and fluid can only one-way flow, when the hydrodynamic pressure in the suction line is big, frictional force between flashboard and the valve seat is big, make valve effort when opening also easily to make sealing part abrasion serious simultaneously, cause leakage; The cavity of existing valve body bottom communicates with a side canal, makes this cavity easily by the clogged with deposits in the fluid, and then influences the closure of flashboard.

[summary of the invention]

Easily produce the deficiency that leakage, unlatching effort and valve body bottom easily are deposited the thing obstruction in order to overcome the existing gate valve that ends, the utility model provides a kind of shape metallic leak-proof structure of plate valve, and the shape metallic leak-proof structure of this plate valve has good airproof performance, unlatching is laborsaving and the valve body bottom is difficult for being deposited the characteristics that thing blocks.

The technical solution of the utility model is: the shape metallic leak-proof structure of this plate valve, comprise valve body, valve rod and valve seat, have valve seat in the valve body, the valve rod lower end is connected with the flashboard of bottom band flowing hole, and the both sides of flashboard are embedded in the interior metal frame seal ring clamping of two valve seats of symmetry.

The utlity model has following beneficial effect: owing to take valve rod lower end in the such scheme to be connected with the flashboard of bottom band flowing hole, Open valve when the hydrodynamic pressure in the suction line is big, high-pressure liquid enters the valve body cavity of resorption from flowing hole, flashboard pressure at both sides equalization, make the frictional force between flashboard and the metal frame seal ring reduce, valve is easy to open: the both sides of flashboard are embedded in the interior metal frame seal ring clamping of two valve seats of symmetry, but fluid two-way flow, the cavity of valve body bottom does not all communicate with two side canals, make this cavity be difficult for by the clogged with deposits in the fluid, do not produce leakage, good sealing effect.

[description of drawings]

Fig. 1 is a structural representation of the present utility model.

1 is valve body among the figure, and 2 is valve rod, and 3 is valve seat, and 4 is flashboard, and 5 is flowing hole, and 6 is the metal frame seal ring.

[embodiment]

Below in conjunction with drawings and Examples the utility model is described in further detail.

As shown in Figure 1, the shape metallic leak-proof structure of this plate valve comprises valve body 1, valve rod 2 and valve seat 3, have valve seat 3 in the valve body 1, valve rod 2 lower ends are connected with the flashboard 4 of bottom band flowing hole 5, and Open valve when the hydrodynamic pressure in the suction line is big just makes flashboard 4 move upward, high-pressure liquid enters valve body 1 cavity of resorption from flowing hole, flashboard 4 pressure at both sides equalizations make that the frictional force between flashboard 4 and the metal frame seal ring 6 reduces, and valve is easy to open; The both sides of flashboard 4 are embedded in metal frame seal ring 6 clampings in two symmetrical valve seats 3, but fluid two-way flow, the cavity of valve body 1 bottom does not all communicate with two side canals, make this cavity be difficult for by the clogged with deposits in the fluid, can not cause to produce between flashboard 4 and the metal frame seal ring 6 and leak, more can not influence the closure of flashboard, good sealing effect is worthy of popularization.

Claims

1, a kind of shape metallic leak-proof structure of plate valve, comprise valve body, valve rod and valve seat, have valve seat in the valve body, it is characterized in that: the valve rod lower end is connected with the flashboard of bottom band flowing hole, and the both sides of flashboard are embedded in the interior metal frame seal ring clamping of two valve seats of symmetry.