CN2527799Y

CN2527799Y - Stop valve

Info

Publication number: CN2527799Y
Application number: CN 02215072
Authority: CN
Inventors: 戴纪良
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-06
Filing date: 2002-01-06
Publication date: 2002-12-25
Anticipated expiration: 2012-01-06

Abstract

The utility model provides a disconnecting valve which belongs to a valve used in a pipeline, solving the problems of worse sealability and shorter service life of the current disconnecting valve. The utility model comprises a valve body, a valve cover and a valve rod; wherein the outer end of the valve rod is fixedly connected with a handle and the inner end is provided with a valve core which is connected with the valve rod by screw thread and is circumferentially fixed in the valve body. A seal port is arranged in the valve body, dividing the valve body cavity into an inlet cavity and an outlet cavity. The body of the valve core is positioned in the inlet cavity and a seal surface matched with the seal port is arranged on the valve core. A seal seat is also arranged in the valve body and a seal ring is arranged between the seal seat and the valve body. The utility model has the advantages that the sealability of the disconnecting valve is better if the flow pressure in the pipeline is larger, because the valve core has a structure of consequent stop the flow. And the utility model which is easy for operation has higher practical valves.

Description

Stop valve

Technical field

The utility model belongs to a kind of valve, particularly a kind of stop valve.

Background technique

At the valve that is used at present on the various pipelines, stop valve uses wider.Stop valve is made up of parts such as valve body, valve rod, spool and switching handles usually, belongs to the contrary structure of damming of closing mostly.The stop valve of this structure is being opened and is being closed in the closed procedure, and spool bears the higher pressure of fluid, and the friction between spool and the valve body is big, occurs easily leaking even scrapping phenomenon, directly has influence on the working life of stop valve.

At the above-mentioned defective of common stop valve, there are many people to design various improved structure, some has also applied for national patent.As " not leaking stop valve " that Chinese patent 98249998.1 provides, it is to be nested with the seal isolation member outside the valve rod in valve pocket, the lower end of insulating element and upper end respectively and spool and the sealing flange that is installed with between valve body and valve gap be sealedly and fixedly connected.The stop valve of this structure is the structure of utilizing in the valve everywhere that is sealed into static seal, to improve its sealability.But because the structure at valve rod and spool place is basic identical with common stop valve, its spool still needs to bear higher pressure and easy to wear, can not solve stop valve working life than lacking this problem.

" downstream sealing valve " that Chinese patent 97250311.0 provides, it is in the bottom of valve rod seal ring to be housed, and the sealing circle is positioned at the influent stream chamber of valve body.This sealing means has changed existing structure, adopts forward sealing, can improve the sealability of valve and increases the service life.But in this valve, its valve rod will pass the sealed mouth in the valve body, makes the end of valve rod be positioned at the influent stream chamber of valve body.Obviously, because the end of valve rod is greater than sealed mouth, make valve rod is impossible by the sealed mouth in the valve body.Even valve rod is divided into two sections, be very difficult by place, influent stream chamber in the valve body on preparation process by sealed mouth the front end of valve rod.Simultaneously, so also be difficult to guarantee between the sealed mouth in seal ring and the valve body on the valve rod cooperating of sealing fully.Therefore, although the middle possible in theory of the valve of said structure is difficult to carry out when reality is made.

Summary of the invention

The purpose of this utility model is at the existing the problems referred to above of existing stop valve, and a kind of structure improved stop valve is provided, make it have simple in structure, implement easily, the characteristics of good seal performance.

The purpose of this utility model realizes by following technical proposal: this stop valve comprises valve body, be loaded on the valve gap on the valve body and pass the valve rod of valve gap, the outer end of the valve rod handle that is being connected, the inner of valve rod is provided with spool, spool connects with valve rod by screw thread, and spool circumferentially is fixed in the valve body, a sealed mouth is arranged in the valve body, this sealed mouth is divided into body cavity the influent stream chamber and goes out to flow two portions in chamber, the main body of spool is positioned at the influent stream chamber, and the sealing surface that matches with sealed mouth is arranged on the spool.

Be provided with a sealing seat in the above-mentioned valve body, sealing seat connects with valve body by screw thread, and the end of sealing seat is above-mentioned sealed mouth.

Also seal ring can be set between above-mentioned sealing seat and the valve body, to guarantee the sealing between sealing seat and the valve body.

Above-mentioned valve rod connects with spool by internal thread.

In the utility model, the main body of spool is the influent stream chamber that is positioned at valve body, withholds on sealed mouth by spool, makes the sealing of sealed mouth place, thereby closes stop valve.Because spool is circumferentially to be fixed in the valve body, and passes through scyewed joint between spool and the valve rod,, stop valve is closed or conducting so, just can make the spool oscilaltion as long as handle with sleeve drives valve rod and rotates.

Compared with prior art, advantage of the present utility model is:

1, because spool is positioned at the influent stream chamber of valve body, the structure of spool for forward damming, therefore ducted hydrodynamic pressure is big more, and the sealing of this stop valve is good more.

2, in the utility model, be provided with a sealing seat in the valve body, not only be convenient to the assembling of spool and valve rod, implement easily, and help improving the sealed mouth place flatness of sealing seat, and make sealed mouth good cooperating be arranged with the sealing surface of spool, guarantee that stop valve has good sealability.

3, in this stop valve, valve rod is supreme in rotation process to be moved down, so can make the valve rod place have better seal, prevents to occur the seepage phenomenon herein.

Description of drawings

Fig. 1 is the cross-sectional view of the stop valve that provides of the utility model.

Fig. 2 is the profile schematic representation of spool in the stop valve that provides of the utility model.

Among the figure: 1, valve body; 2, valve rod; 20, convex shoulder; 3, spool; 30, sealing surface; 4, handle; 5, valve gap; 6, sealing seat; 7, seal ring; 8, bonnet; 9, sealed mouth; 10, influent stream chamber; 11, go out to flow the chamber; 12, jump ring.

Embodiment

As shown in Figure 1, this stop valve comprises parts such as valve body 1, valve rod 2, spool 3, handle 4, valve gap 5, sealing seat 6 and seal ring 7.Valve gap 5 connects with valve body 1 by screw thread, and valve rod 2 passes valve gap 5.The outer end of valve rod 2 handle 4 that is being connected innerly connects with spool 3 by screw thread.In the present embodiment, valve rod 2 connects with spool 3 by internal thread, and is like this can valve rod 2 less with the size of spool 3 connection places, improves the flow of stop valve.

As shown in Figure 2, the main body of spool 3 is a hexagon, in the influent stream chamber 10 of valve body 1 shape that matches is therewith arranged also.Like this, spool 3 circumferentially is fixed in the valve body 1, and spool 3 can not be rotated in valve body 1, can only be along oscilaltion.Certainly, also having other to make the circumferentially fixing mode of spool 3, as slotting on spool 3 or convex tendon or the like being set, is feasible equally.The upper surface of spool 3 is a sealing surface 30.

As shown in Figure 1, the sealing seat 6 in the valve body 1 connects with valve body 1 by screw thread.Be provided with O shape rubber seal 7 between sealing seat 6 and the valve body 1.The underpart of sealing seat 6 is a sealed mouth 9.Sealed mouth 9 is divided into valve body 1 inner chamber influent stream chamber 11 and goes out to flow 12 two parts in chamber.Fluid by stop valve by influent stream chamber 11 by sealed mouth 9 to going out to flow chamber 12.Match with the sealing surface 30 of spool 3 in the lower end surface of sealing seat 6, when both closely contact, and sealed mouth 9 sealings, stop valve just is in closed condition.Because flowing to of force direction when spool 3 contacts with sealed mouth 9 and fluid is in full accord, so the pressure of fluid is high more in the pipeline, the sealability of this stop valve is good more.

In the present embodiment, also be provided with O shape rubber seal 7 between valve gap 5 and the valve rod 2.This seal ring 7 is in order to prevent that leakage phenomenon from appearring in valve rod 2 places.Valve gap 5 is outer to be provided with bonnet 8, and bonnet 8 is socketed on the valve rod 2, and bonnet 8 connects with valve gap 5 by screw thread, thereby seal ring 7 is located.

Also have annular groove between above-mentioned bonnet 8 and the valve rod 2, a jump ring 12 is positioned at annular groove.By jump ring 12, make valve rod 2 and bonnet 8 axial restraints, prevent valve rod 2 oscilaltions.Simultaneously, also had the convex shoulder 20 of similar effect on the valve rod 2, this convex shoulder 20 is positioned at valve gap 5 places.

Obviously,, make spool 3 oscilaltions, stop valve is closed or opened as long as handle with sleeve 4 just can drive valve rod 2 and rotate together.In valve rod 2 rotation processes, valve rod 2 can not move up and down.

In the present embodiment, spool 3 and sealing seat 6 all adopt metallic material to make.

The utility model is implemented to can be applicable to have higher utility on various types of stop valves easily.

Claims

1, a kind of stop valve, comprise valve body (1), be loaded on the valve gap (5) on the valve body (1) and pass the valve rod (2) of valve gap (5), the outer end of valve rod (2) handle (4) that is being connected, the inner that it is characterized in that described valve rod (2) is provided with spool (3), spool (3) connects with valve rod (2) by screw thread, and spool (3) circumferentially is fixed in the valve body (1), a sealed mouth (9) is arranged in the valve body (1), this sealed mouth (9) is divided into influent stream chamber (10) with valve body (1) inner chamber and goes out to flow (11) two parts in chamber, the main body of spool (3) is positioned at influent stream chamber (10), and the sealing surface (30) that matches with sealed mouth (9) is arranged on the spool (3).

2, stop valve according to claim 1 is characterized in that being provided with in the described valve body (1) sealing seat (6), and sealing seat (6) connects with valve body (1) by screw thread, and the end of sealing seat (6) is above-mentioned sealed mouth (9).

3, stop valve according to claim 2 is characterized in that between described sealing seat (6) and the valve body (1) seal ring (7) being set.

4,, it is characterized in that what described valve rod (2) connected with spool (3) by internal thread according to claim 1,2 or 3 described stop valves.

5, according to claim 1,2 or 3 described stop valves, the main body that it is characterized in that described spool (3) is a hexagon, in the influent stream chamber (10) of valve body (1) shape that matches is therewith arranged also.

6,, it is characterized in that being provided with O shape rubber seal (7) between described valve gap (5) and the valve rod (2) according to claim 1,2 or 3 described stop valves.

7, stop valve according to claim 6 is characterized in that being provided with bonnet (8) outside the described valve gap (5), and bonnet (8) is socketed on the valve rod (2), and bonnet (8) connects with valve gap (5) by screw thread.

8, stop valve according to claim 7 is characterized in that having annular groove between described bonnet (8) and the valve rod (2), and a jump ring (12) is positioned at annular groove.

9, according to claim 1,2 or 3 described stop valves, it is characterized in that convex shoulder (20) is arranged on the described valve rod (2), this convex shoulder (20) is positioned at valve gap (5) and locates.

10,, it is characterized in that described spool (3) and sealing seat (6) all adopt metallic material to make according to claim 1,2 or 3 described stop valves.