CN204437303U

CN204437303U - Multi-level soft sealing butterfly valve

Info

Publication number: CN204437303U
Application number: CN201520053240.8U
Authority: CN
Inventors: 陈春景
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-01-27
Filing date: 2015-01-27
Publication date: 2015-07-01
Anticipated expiration: 2025-01-27

Abstract

The utility model relates to multi-level soft sealing butterfly valve, comprises butterfly plate, and the outer rim end face of described butterfly plate is sealing surface, on butterfly plate outer rim end face, butterfly valve is provided with a circle or a few grooves, interval, parallel setting between groove, the utility model sealability is better, can realize zero leakage.

Description

Multi-level soft sealing butterfly valve

Technical field

The utility model relates to a kind of multi-level soft sealing butterfly valve.

Background technique

Soft sealing butterfly valve purposes is relatively extensive, and soft sealing butterfly valve is used for realizing pipe-line system cuts off and the parts of flow control as a kind of, obtains applying very widely in many fields such as oil, chemical industry, metallurgy, water power.In known butterfly valve technology, its seal form many employings sealing configuration, sealing material is rubber, teflon etc.Then still there are some defects in existing soft sealing butterfly valve, although be that requirement reaches zero leakage in NBS, but when normal use, zero leakage completely cannot be accomplished in most cases, extrude owing to producing at closedown butterfly valve and valve seat and form sealing surface, therefore all can there is certain leakage rate, if the material of butterfly valve just may cause secondary pollution time butterfly valve needs out of joint are changed or keeped in repair simultaneously, and can cause be affected working life.

Model utility content

Soft sealing butterfly valve is applicable to the industries such as potable water, plumbing, sewage treatment, rock gas, coal gas, industry and food, and the enhancing along with people's environmental consciousness and the consideration to own health, particularly the pollution problem of water resources more and more becomes the focus that people pay close attention to, and the effect that soft sealing butterfly valve plays is self-evident.The present invention is on the basis of traditional soft sealing butterfly valve, realize Multi-layer sealing, with some the unsolved difficult problems solving traditional soft seal butterfly valve and the shortcoming used, technical problem to be solved in the utility model is the problem solving the leakage of traditional soft seal butterfly valve, secondary pollution and extend soft sealing butterfly valve working life, and the technological scheme realizing above-mentioned purpose is as follows:

Multi-level soft sealing butterfly valve, comprises butterfly valve body, and butterfly valve body comprises butterfly plate, and the outer rim end face of described butterfly plate is sealing surface, it is characterized in that: on butterfly plate outer rim end face, and butterfly valve is provided with a circle or a few grooves, interval, parallel setting between groove.

Preferably, the sectional shape of described groove is roughly U-shaped structure.

Preferably, the sectional shape of described groove is roughly V-structure.

Preferably, the sectional shape of described groove is roughly isosceles trapezoid type structure.

Preferably, the integral thickness of described butterfly plate is thicker than 1/3rd of existing butterfly plate integral thickness.

The utility model sealability is better, can realize zero leakage.

Accompanying drawing explanation

Fig. 1 is the schematic diagram that the utility model is applied on equipment

Fig. 2 is Fig. 1 side view

Fig. 3 is the utility model half sectional view

Figure number illustrates: multi-level soft sealing butterfly valve 1, valve seat 2, outer rim end face 3, butterfly valve body 4, groove 5, butterfly plate 6

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in detail.

In figure, multi-level soft sealing butterfly valve 1 be with valve seat 2 with the use of, extrude between the outer rim end face 3 of multi-level soft sealing butterfly valve and the inwall of valve seat and realize sealing, namely the outer rim end face 3 of butterfly valve is the end face coordinated between valve base inner wall, the outer rim end face of butterfly plate 6 arranges groove 5 specifically, as shown in Figure 1.In the present invention, the assembling of butterfly valve is identical with the position of installing in prior art.

Multi-level soft sealing butterfly valve, comprises butterfly valve body 4, and butterfly valve body 4 comprises butterfly plate 6, and the outer rim end face of described butterfly plate 6 is sealing surface, on butterfly plate 6 outer rim end face or side face, butterfly valve is provided with a circle or a few grooves 5, interval, parallel setting between groove.The sectional shape of groove can be U-shaped, V-type substantially, or even the structure of isosceles trapezoid.Every layer of groove can use as one sealing surface, and multi-turn groove just defines multi-turn sealing surface.The width of groove can be arranged between 1-5 millimeter according to the thickness of butterfly plate 6, it is more coarse that bottom surface and the side of groove can be arranged, the speed of MEDIA FLOW is reduced, although become the present invention's just slight improvement, but can realize the effect that material zero is revealed.

When arranging groove on the sealing surface of butterfly valve, under the prerequisite not changing butterfly valve shape, the thickness of the thickness thicker than the thickness of the butterfly plate of same specification in prior art about 1/3rd of butterfly plate entirety, can provide enough spaces for the groove arranging a few even more multi-turns like this.

The maximum differential of the present invention and prior art has been multi-layer sealed, original soft sealing butterfly valve only has a layer sealing surface (i.e. butterfly valve contact with valve base inner wall face), all can there be leakage, leakage rate and the linear increase of caliber size of trace in most cases.Multi-layer sealing face butterfly valve is on the basis of a layer sealing surface of original valve plate, the thickness of butterfly plate is suitably thickeied, then a circle groove (words that thickness is enough thick can be more) is done around butterfly plate periphery, like this when butterfly valve cuts out, just have multilayer edge to extrude with valve seat and contact, realize the sealing of multilayer sublevel, make it to reach better effect.

When butterfly valve cuts out, first layer sealing surface still can produce a small amount of leakage, leadage coefficient is substantially identical with originally traditional single sealing surface, at this moment a small amount of medium leaked out can flow in groove, be between first layer and second layer sealing surface, if the leakage rate of first layer is little, the medium amount entered between first layer and the second layer will be very little, so would not continue to leak; And if when amount is relatively large, can continue down one deck leaks, at this moment have more micro-medium between the second layer and third layer, by that analogy, make leakage rate reduce to minimum by the method that this kind successively decreases.This minimizing reduces with geometrical factor, to last almost negligible, to realize real zero leakage.

For individual layer sealing surface, sealing surface is relatively thick, when butterfly valve cuts out, the torque ratio needed is larger could close completely, and the thickness summation of all sealing surfaces in Multi-layer sealing face is less than originally traditional individual layer sealing surface, multi-level each sealing surface suffered pressure when closing will be made to be less than individual layer sealing surface, and therefore required moment is relatively little, uses more for convenience.Simultaneously because butterfly valve outer rim end face is thickening, making it to bear pressure capability increases, and soft seal pressure-bearing is originally exactly a large weakness, also can obtain certain alleviation here.

These are only the preferred embodiment of the utility model embodiment; not in order to limit the utility model embodiment; within all spirit in the utility model embodiment and principle; any amendment of doing, equivalent replacement, improvement etc., all should be included in the protection domain of the utility model embodiment.

Claims

1. multi-level soft sealing butterfly valve, comprise butterfly valve body, butterfly valve body comprises butterfly plate, and the outer rim end face of described butterfly plate is sealing surface, it is characterized in that: on butterfly plate outer rim end face, and butterfly valve is provided with a circle or a few grooves, interval, parallel setting between groove.

2. multi-level soft sealing butterfly valve according to claim 1, is characterized in that: the sectional shape of described groove is roughly U-shaped structure.

3. multi-level soft sealing butterfly valve according to claim 1, is characterized in that: the sectional shape of described groove is roughly V-structure.

4. multi-level soft sealing butterfly valve according to claim 1, is characterized in that: the sectional shape of described groove is roughly isosceles trapezoid type structure.

5. multi-level soft sealing butterfly valve according to claim 1, is characterized in that: the integral thickness of described butterfly plate is thicker than 1/3rd of existing butterfly plate integral thickness.