CN202580063U

CN202580063U - Stop valve

Info

Publication number: CN202580063U
Application number: CN 201220206736
Authority: CN
Inventors: 汪钦; 王国富; 李长胜; 孙士照; 王忠海; 王琛博
Original assignee: WENZHOU BLUE SKY PIPE FITTINGS VALVE CO Ltd
Current assignee: WENZHOU BLUE SKY PIPE FITTINGS VALVE CO Ltd
Priority date: 2012-05-09
Filing date: 2012-05-09
Publication date: 2012-12-05
Anticipated expiration: 2022-05-09

Abstract

The utility model discloses a stop valve, aiming at providing the stop valve which is simple in manufacturing process and capable of reducing the labor intensity and ensuring the sealing property. The technical scheme of the utility model is as follows: the stop valve comprises a valve body, wherein the valve body comprises a first valve body and a second valve body which are fixedly connected, a valve seat is fixedly connected to the connection part between the first valve body and the second valve body, a valve flap and a valve rod for driving the valve flap to do a rectilinear motion along a central line of the valve seat are arranged in the valve body, the valve flap is provided with a valve flap sealing part for forming sealing with the valve seat, the valve seat is provided with a valve seat sealing part for forming sealing with the valve flap, the valve flap sealing part is arranged in a plane structure, and the valve seat sealing part faces to one side of the valve flap and is arranged in a convex cambered surface structure. The stop valve disclosed by the utility model is suitable for various types of stop valves.

Description

Stop valve

Technical field

The utility model relates to a kind of valve, and more particularly, it relates to a kind of stop valve.

Background technique

Stop valve is meant the valve that closure member (flap) moves along the centre line; Flap is along the center line moving linearly of valve seat, because the valve rod of such valve is opened or shutoff stroke is shorter relatively, and has and cuts off function very reliably; Again because the variation of valve seat port and the stroke relation in direct ratio of flap; Be very suitable for the adjusting to flow, therefore, such stop valve valve that dams is suitable as cut-out or adjusting and throttling and uses very much.Said valve seat is provided with the valve base sealing portion, the flap that are used for contacting with flap sealing and is provided with and is used for the flap sealed department that contacts with valve base sealing; The shape of valve base sealing portion and flap sealed department is suitable; Adopt the plane to the plane; Or the employing conical surface is to the sealing configuration of the conical surface; Have good surface roughness even still need grind the sealing pair that guarantees the valve seat flap after traditional plane sealing process numerical control fine finishing, and the microcosmic slit that needs very high sealing force guarantee that the seal pressure of sealing surface is filled up between the sealing pair by the sealing surface resiliently deformable makes valve seal realize.That is to say that such sealing surface structure exists the sealability of sealing surface not up to standard easily; Medium in the valve body goes out from the clearance portion bit stream of sealing surface; If want to make that sealability is strong, requirement on machining accuracy need carry out high-precision cooperation to valve base sealing portion and flap sealed department just than higher; Complex process makes labor intensity of operating personnel excessive.

Summary of the invention

To the deficiency that existing technology exists, the purpose of the utility model be to provide a kind of manufacturing process simple, can reduce labor intensity, guarantee the stop valve of sealability.

For realizing above-mentioned purpose; The utility model provides following technological scheme: a kind of stop valve, comprise valve body, and valve body comprises first valve body and second valve body of fixed connection; The joint of said first valve body and second valve body is fixedly connected with valve seat; Be provided with flap in the valve body and be used to drive flap and do straight-line valve rod along the center line of valve seat, said flap is provided with the flap sealed department that is used for forming with valve seat sealing, and said valve seat is provided with the valve base sealing portion that is used for forming with flap sealing; Said flap sealed department is the plane structure setting, and said valve base sealing portion is for being the globoidal structure setting of evagination towards flap one side.

Through adopting technique scheme, change the sealing of valve seat and flap into the conical surface by traditional plane sealing or conical surface seal and seal with convex globoidal, owing to valve base sealing portion towards flap one side evagination; So flap is along the center line movement of valve seat the time, the conical surface of flap can form tangent with the convex globoidal of valve seat, is about to traditional plane sealing structure and has made the linear sealing structure into; Only need through numerical control fine finishing, the grinding process of skipping complicacy consuming time directly gets into assembling, just can be under low sealing force effect; Realize the resiliently deformable of valve seat flap sealing surface, thereby realize the sealing of valve, this structure has not only been saved complicated grinding process; And also significantly reduction of valve torque, sealing is reliable, and sealing surface is not easy to adhere to any impurity; Simplify processing technology, made labor intensity of operating personnel reduce.

The utility model further is set to: said flap sealed department is conical surface setting, and the opposite side of the relative valve rod of said flap sealed department is the arc structure setting of evagination.

Through adopting technique scheme, the conical surface is easier and convex-shaped arc surface formation sealing than vertical plane, and sealing is more reliable, and the arc structure of evagination can have the effect of good weakening erosion damage effect for washing away strong medium.

The utility model further is set to: said valve seat and flap are carbon steel material and constitute the surface overlaying of valve base sealing portion and flap sealed department or coated with hard alloy material.

Through adopting technique scheme, can prevent that valve base sealing portion and flap sealed department from making seal failure because of the generation severe plastic deformation.

Description of drawings

Fig. 1 is the utility model stop valve embodiment's a structural representation;

Fig. 2 is the A portion enlarged view of Fig. 1.

Embodiment

Referring to figs. 1 through Fig. 2 the utility model stop valve embodiment is further specified.

A kind of stop valve; Comprise valve body 1; Valve body 1 comprises first valve body 11 and second valve body 12 of fixed connection, and the joint of said first valve body 11 and second valve body 12 is fixedly connected with valve seat 3, is provided with flap 2 in the valve body 1 and is used to drive flap 2 to do straight-line valve rod 4 along the center line of valve seat 3; Said flap 2 is provided with the flap sealed department 21 that is used for forming with valve seat 3 sealing; Said valve seat 3 is provided with the valve base sealing portion 31 that is used for forming with flap 2 sealing, and said flap sealed department 21 is the plane structure setting, and said valve base sealing portion 31 is for being the globoidal structure setting of evagination towards flap 2 one sides.

Through adopting technique scheme, change the sealing of valve seat 3 and flap 2 into the conical surface and convex globoidal sealing by traditional plane sealing or conical surface seal, owing to valve base sealing portion 31 towards flap 2 one side evaginations; So flap 2 is along the center line movement of valve seat 3 time; The conical surface of flap 2 can form tangent with the convex globoidal of valve seat 3, thereby reaches the effect of accurate sealing, makes sealing reliability strengthen; And the convex globoidal of valve seat 3 can directly draw through machining; Need not after machining for processing technology has been simplified in repeatedly reconditioning with the conical surface precision-fit of flap 2, make labor intensity of operating personnel reduce.

Said flap sealed department 21 is conical surface setting, and (what need explain is here; Described sealing configuration can match for the convex globoidal of valve base sealing portion 31 and the plane of flap sealed department 21; For making sealing more reliable; So present embodiment is preferred, said sealing configuration is that the convex globoidal of valve base sealing portion 31 and the conical surface of flap sealed department 21 match), the opposite side of said flap sealed department 21 relative valve rods 4 is the arc structure setting of evagination, and (what need explain is here; The opposite side of described flap sealed department 21 relative valve rods 4 can be the plane structure setting; For making flap 2 have the effect of good weakening erosion damage effect for washing away strong medium, present embodiment is preferred, and the opposite side of said flap sealed department 21 relative valve rods 4 is the arc structure setting of evagination).

Through adopting technique scheme, the conical surface is easier and convex-shaped arc surface formation sealing than the plane, and sealing is more reliable, and the arc structure of evagination can have the effect of good weakening erosion damage effect for washing away strong medium.

Said valve seat 3 is carbon steel material with flap 2 and constitutes; (what need explain is the surperficial coated with hard alloy material of valve base sealing portion 31 and flap sealed department 21 here; For preventing that valve base sealing portion 31 and flap sealed department 21 from making seal failure because of producing severe plastic deformation; Present embodiment is preferred, valve base sealing portion 31 and equal built-up welding in flap sealed department 21 surfaces or coated with hard alloy material, described hard material can be Tungsten carbite, Si Taili or other Hardmetal materials).

Claims

1. stop valve; Comprise valve body; Valve body comprises first valve body and second valve body of fixed connection, and the joint of said first valve body and second valve body is fixedly connected with valve seat, is provided with flap in the valve body and is used to drive flap to do straight-line valve rod along the center line of valve seat; Said flap is provided with the flap sealed department that is used for forming with valve seat sealing; Said valve seat is provided with the valve base sealing portion that is used for forming with flap sealing, and it is characterized in that: said flap sealed department is the plane structure setting, and said valve base sealing portion is for being the globoidal structure setting of evagination towards flap one side.

2. stop valve according to claim 1 is characterized in that: said flap sealed department is conical surface setting, and the opposite side of the relative valve rod of said flap sealed department is the arc structure setting of evagination.

3. stop valve according to claim 1 and 2 is characterized in that: said valve seat and flap are carbon steel material and constitute the surface overlaying of valve base sealing portion and flap sealed department or coated with hard alloy material.