CN2318468Y

CN2318468Y - Plate sluice valve sealing assistance

Info

Publication number: CN2318468Y
Application number: CN 97225406
Authority: CN
Inventors: 刘继中; 陈元芳; 陈继生
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-09
Filing date: 1997-06-09
Publication date: 1999-05-12
Anticipated expiration: 2007-06-09

Abstract

The utility model discloses a plate sluice valve sealing pair, which is characterized in that a spring used for increasing sealing additional force adopts a spring with cage type tension seat, and the surface contact can be formed between the spring and the valve seat; even additional sealing force can be formed between a sluice plate and a sealing surface; the lower part of the sluice plate without a flow guide hole is provided with a semi-circular structure, when a sluice valve is fully opened, the semi-circular part can play a positioning function to the valve seat, and an additional positioning device does not need. The utility model has the advantages of simple structure, convenient installation and adjustment, reliable sealing performance, and good effect.

Description

A kind of plate valve sealing pair

The utility model relates to a kind of valve, specifically about a kind of plate valve.The utility model is applicable to band pod apertures and no pod apertures Single Disc Flat Gate Valves.

At present, both at home and abroad plate valve sealing pair form is a lot, the envelope pair of band pod apertures plate valve, and its valve seat all adopts floating type, does spacingly with flashboard, and sealing force relies on pressure medium to produce.This sealing configuration is poor in low pressure situation lower seal performance.Sealing additional force when increasing low pressure, more external products are set up belleville spring or are organized cylindrically coiled spring more at the floating valve seat place, the additional force point of action that this structure produces all is a line or some spots, the point of action that is prone to discontinuity or power damages by pressure and loses elastic force, cause valve seat stuck, can not float, produce and leak.Under the corrosivity operating mode, the elastic element material is selected also difficulty.

No pod apertures plate valve is when opening entirely, and flashboard does not play position-limiting action to valve seat, and valve seat is machine made, does not have additional seal power, poor sealing performance.In order to increase additional seal power and the limiting valve seat moves, U. S. Patent product (NO4246.928, NO4.364.544, NO4017053) adopts floating type valve seat, add elastic element, spacing of valve seat is put additional fastening limit stoper such as limit pin, spacing ring washer or positive stop hook, this limit method complex structure, install, adjust difficulty, the adjustment of its spacing position is difficult to guarantee that flashboard and sealing surface of seat seal rightly.Simultaneously, elastic element all is to adopt butterfly spring or organize cylindrically coiled spring more, exists and the above same shortcoming.

The purpose of this utility model is that design is a kind of simple in structure, installation, easy to adjust, the plate valve sealing pair of good seal performance.

The purpose of this utility model can be achieved through the following technical solutions: scheme of the present utility model comprises flashboard, seal ring, valve seat, spring, its spring adopts cage backstand formula, with contact for face between the valve seat, provide all around sealing additional force uniformly to sealing surface, and can select different materials to make according to the needs of working medium.Semicircle is made in the flashboard bottom of no pod apertures plate valve, and its semicircle outer shroud shelves played position-limiting action toward the seal ring first half when gate valve opened entirely.

The utility model beneficial effect compared with prior art is: adopt cage backstand formula spring, with contact for face between the valve seat, guarantee that the additional seal power around the sealing surface is even, good seal performance, flashboard can be made spacing usefulness when no pod apertures plate valve was opened entirely, did not need the additional fastening limit stoper, and is simple in structure, installation, easy to adjust seals reliable, effective.

Fig. 1 is the structural drawing that the utility model has pod apertures and first pod apertures Single Disc Flat Gate Valves sealing pair.

Fig. 2 is no pod apertures plate valve flashboard structure figure among Fig. 1.

Fig. 3 is cage backstand spring structure figure among Fig. 1.

Fig. 4 is that Fig. 3 A-A is to sectional view.

Now in conjunction with the accompanying drawings and embodiments the utility model is further described.

The utility model Single Disc Flat Gate Valves sealing pair comprises flashboard, seal ring, valve seat and spring.Fig. 1 has reflected the sealing pair structure that pod apertures and two kinds of situations of no pod apertures are arranged, and valve seat 3 is floating type, and valve seat 3 is equipped with " O " RunddichtringO 2 by the flashboard side end face, and valve originally is equipped with " O " RunddichtringO 5,6 between 8.Spring 4 is a cage backstand structure, can select suitable material to make according to the needs of working medium, with between the valve seat 3 for face contacts, for the sealing surface between flashboard 1 and the valve seat 3 provides uniform additional seal power, " O " RunddichtringO 7 is housed between spring 4 and the valve body 8.The flashboard 1 of no pod apertures plate valve is a structure shown in Figure 2, the bottom is semicircle, the semicircle orifice diameter is identical with valve seat 3 apertures, when gate valve opens state entirely, flashboard 1 semicircle position is the limit stoper of valve seat 3, and 1 liang of survey of flashboard is symmetrical seal arrangement, when gate valve is closed, flashboard 1 outlet is surveyed by pressure medium and spring 4 effect lower seals, and suction side is realized sealing down by spring 4 additional force effects.Connected by muscle between the adjacent shell fragment of cage backstand among Fig. 3, the quantity of muscle is 3,4,5,6, increases along with the increase of valve aperture.

Claims

1, a kind of plate valve sealing pair comprises flashboard (1), seal ring (2,5,6,7), valve seat (3) and spring (4), it is characterized in that described spring (4) is a cage backstand spring, and contacts for face between the floating valve seat (3); Its lower end was for semicircle when described flashboard (1) was no pod apertures, and its semicircle all played position-limiting action to valve seat (3) in the position when gate valve opened state entirely.

2, plate valve sealing pair according to claim 1 is characterized in that between the adjacent shell fragment of described cage backstand spring (4) being connected by muscle, and the quantity of connecting tendon is 3,4,5 or 6, along with joining valve aperture increase and increase.