CN202629125U

CN202629125U - Wear-resistant sliding-plate valve

Info

Publication number: CN202629125U
Application number: CN 201220254737
Authority: CN
Inventors: 卓桂朝; 罗起飞; 戴文柏
Original assignee: SHENGBOLAI VALVE CO Ltd
Current assignee: SHENGBOLAI VALVE CO Ltd
Priority date: 2012-05-31
Filing date: 2012-05-31
Publication date: 2012-12-26
Anticipated expiration: 2022-05-31

Abstract

The utility model discloses a wear-resistant sliding-plate valve. The wear-resistant sliding-plate valve comprises a valve body with a runner, a gasket, a bonnet, a valve seat, a valve plate, a cylinder compression spring, a compression ring and a valve rod, wherein a sealing pair is arranged between the valve seat and the valve plat. The sliding-plate valve further comprises a disc spring, an O-shaped ring, a graphite ring and a valve seat graphite rope, wherein the disc spring is arranged between the compression ring and the valve seat, the O-shaped ring and the valve seat graphite rope are both sleeved on the valve seat, and the graphite ring is placed between the compression ring and the valve body. The wear-resistant sliding-plate valve is good in sealing properties, high in reliability and long in service life, and meets fire protection requirements of valves.

Description

A kind of wear-resisting sluice valve

Technical field

The utility model relates to a kind of sluice valve, particularly a kind of have wear-resisting, be applicable to conveying gaseous state+solid-state, liquid state+solid state medium, be particularly useful for a kind of wear-resisting sluice valve of granule medium operating mode.

Background technique

At present, the valve that is used for granule medium is main with ball valve mainly, and ball valve is owing to receive the restriction of structure, often under this harsh operating mode, uses the life-span not long, is mainly caused by following reason:

1. ordinary ball valve is in opening-closing process, and medium is prone to get into valve pocket, and in valve pocket, piles up; , medium temperature can cause some medium to solidify and the locking open-shut device when reducing, so be prone to cause serious consequence such as valve is stuck.

2. some medium when having the granule medium in-line flow at high speed of high hardness like silica flour, coal dust etc., is prone to cause sealing surface of seat damage or spherome surface sprayfused coating to come off, and then influences the valve seal effect, when serious, can cause valve seal to lose efficacy.

The model utility content

The technical problem that the utility model will solve provides a kind of lumen no backup, good seal performance, the wear-resisting sluice valve of a kind of separable type that reliability is high.

For achieving the above object, the technological scheme of the utility model is following:

A kind of wear-resisting sluice valve comprises the valve body, pad, valve gap, valve seat, valve plate, cylindrical compression spring, pressure ring and the valve rod that have runner, is provided with sealing pair between said valve seat and the valve plate; Said sluice valve also comprises dish spring, O type circle, graphite annulus and valve seat graphite rope; Said dish spring is arranged between pressure ring and the valve seat, and said O type circle and valve seat graphite rope all are enclosed within on the valve seat, and said graphite annulus is placed between pressure ring and the valve body.

Preferably, said sealing pair is a plane sealing structure.

Preferably, said valve seat and valve plate surface sprayed wc.

Preferably, said graphite annulus is a stainless steel metal wire folder Expanded graphite.

Through technique scheme, the beneficial effect of the utility model is:

The utility model valve seat is provided with the double sealing structure that O shape circle and graphite annulus are formed, and valve seat has roomy sealing surfaces, so can effectively prevent medium entering valve pocket; Simultaneously, valve seat graphite rope is arranged on the runner inlet side, can protects O shape circle not to be subject to the granule medium damage, even O type circle damages or when causing O type circle to lose efficacy owing to reasons such as fire, graphite annulus can keep sealing state all the time; So promptly improve the valve seal performance, increased the working life of valve again, and can satisfy the fire prevention demand of valve.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model double sealing structure schematic representation;

Fig. 3 a is the utility model sealing pair sealing principle Fig. 1;

Fig. 3 b is the utility model sealing pair sealing principle Fig. 2;

When Fig. 4 a is valve opening and closing, media flow schematic representation 1;

When Fig. 4 b is valve opening and closing, media flow schematic representation 2;

Fig. 5 is the valve seat construction schematic representation;

Fig. 6 is the valve board structure schematic representation.

The numeral corresponding part title represented among the figure with letter:

10, valve body 20, valve gap 30, valve seat 40, valve plate 50, cylindrical compression spring 60, pressure ring 70, valve rod 80, sealing pair 90, dish spring 100, O type circle 110, graphite annulus 120, valve seat graphite rope 130, pad

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.

Referring to shown in Figure 1; A kind of wear-resisting sluice valve of the utility model comprises valve body 10, pad 130, valve gap 20, valve seat 30, valve plate 40, cylindrical compression spring 50, pressure ring 60 and the valve rod 70 that has runner, is provided with sealing pair 80 between said valve seat 30 and the valve plate 40; Said sluice valve also comprises dish spring 90, O type circle 100, graphite annulus 110 and valve seat graphite rope 120; Said dish spring 90 is arranged between pressure ring 60 and the valve seat 30, and said O type circle 100 all is enclosed within on the valve seat 30 with valve seat graphite 120, and said graphite annulus 110 is placed between pressure ring 60 and the valve body 10.

The utility model valve seat 30, valve plate 40 surperficial sprayed wcs or spray other hard material, said graphite annulus 110 are stainless steel metal wire folder Expanded graphite or other material.

The utility model valve rod 70 is connected to transmit thrust through T-slot (not marking among the figure) with valve plate 40; The thrust that provides when handwheel or actuator was in 70 last times of valve rod; Can make valve rod 70 along its axial-movement; Drive valve plate 40 simultaneously and on the fluid Vertical direction, produce displacement, thereby change the keying function that circulation area realizes valve.

Referring to shown in Figure 2, under the situation of no pressure medium, the pretightening force that provides through butterfly spring 90; Make pressure ring 60 compressed graphite rings 110; Can guarantee to keep sealing state around the graphite annulus 110, simultaneously, the reaction force of butterfly spring 90 is pushed valve seat 30 to valve plate 40; Valve seat 30 sealing surfaces are contacted with valve plate 40 sealing surfaces, and keep reliable initial sealing.

Shown in Fig. 3 a and Fig. 3 b, when having pressure medium in the pipeline, can know that pressure medium P1 can push entrance point valve seat and valve plate to outlet end one side, and slide plate is contacted with the outlet end sealing surface of seat by piston effect, make valve export end sealing pair keep sealing; In like manner, under the effect of medium power P2, the entrance point valve seat will be pushed to slide plate one side, make its sealing surface near the skid plate seals face, thereby make valve inlet end sealing pair keep sealing.

Referring to Fig. 4 a, Fig. 4 b, Fig. 5, shown in Figure 6; The valve seat 30 and the valve plate 40 of the utility model all have roomy sealing surface, and when valve closing, medium only can temporarily be piled up in valve plate 40 runner holes; During valve opening; Be deposited in that medium can be poured pipeline again in the runner hole,, more can in valve pocket, do not pile up so medium can not get into valve pocket.

In addition, common hard seal ball valve sealing pair is spheric structure, and this type of sealing pair requires high to process equipment and accuracy of manufacturing; Its sealing surface of seat and spheroid must grind after the fine finishing; And also need match grinding after grinding, complex manufacturing, the manufacture cycle is long; So its manufacturing efficiency is low, and cost of production is constantly soaring.The sealing pair 80 of the utility model adopts plane sealing structure, has promptly guaranteed excellent sealing performance, has improved technology capability again.Therefore, no matter from the angle of product performance, manufacture cost and manufacturing efficiency, the utility model all has clear superiority.

In sum, the utlity model has good seal performance, long lifetime, be prone to make, just advantages such as maintenance and beautiful shape, compact structure.

More than show and described basic principle of the utility model and the advantage of major character and the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.

Claims

1. a wear-resisting sluice valve comprises the valve body, pad, valve gap, valve seat, valve plate, cylindrical compression spring, pressure ring and the valve rod that have runner, is provided with sealing pair between said valve seat and the valve plate; It is characterized in that: said sluice valve also comprises dish spring, O type circle, graphite annulus and valve seat graphite rope; Said dish spring is arranged between pressure ring and the valve seat, and said O type circle and valve seat graphite rope all are enclosed within on the valve seat, and said graphite annulus is placed between pressure ring and the valve body.

2. a kind of wear-resisting sluice valve according to claim 1 is characterized in that: said sealing pair is a plane sealing structure.

3. a kind of wear-resisting sluice valve according to claim 1 is characterized in that: said valve seat and valve plate surface sprayed wc.

4. a kind of wear-resisting sluice valve according to claim 1 is characterized in that: said graphite annulus is a stainless steel metal wire folder Expanded graphite.