CN216975865U

CN216975865U - Gas path switching valve

Info

Publication number: CN216975865U
Application number: CN202220299679.9U
Authority: CN
Inventors: 桥本真喜; 刘冬玮; 俞冬辉
Original assignee: Kawata Machinery Manufacturing Shanghai Co ltd
Current assignee: Kawata Machinery Manufacturing Shanghai Co ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-07-15
Anticipated expiration: 2032-02-15

Abstract

The utility model relates to a novel gas circuit switching valve which comprises a valve body, wherein the valve body is provided with a gas circuit distribution pipe and a cylinder assembly corresponding to the gas circuit distribution pipe, the cylinder assembly forms surface sealing with the inner wall of the valve body through a sealing gasket, and the inner wall of the valve body is provided with a circular arc-shaped sealing surface. The novel gas path switching valve provided by the utility model has the advantages of low cost, simplicity and convenience in installation, good sealing property, long service life and the like.

Description

Gas path switching valve

Technical Field

The utility model relates to the technical field of switching valves, in particular to a novel gas circuit switching valve.

Background

At present, the conveying gas circuit switching valves used in the rubber and plastic auxiliary machine industry are manufactured by manufacturers, the structure of the conveying gas circuit switching valves is that one or more cylinders are installed on the same valve body, line sealing is carried out on the contact surface between a nonmetal gasket installed at the front end of a cylinder piston rod and the wall thickness of a pipe, the expansion and contraction of the cylinder piston rod realize the opening and closing of corresponding gas circuits, and the cylinders are controlled by a set program through electromagnetic valves, so that the switching use of different gas circuits is realized. The disadvantages of this structure are:

(1) the contact surface of the sealing gasket and the pipe wall is linear sealing, and the sealing property is poor;

(2) the sealing gasket is easy to cut off and fall off, the service life of the sealing gasket is short, customers need to frequently replace the sealing gasket, the workload is increased, and the production is influenced;

(3) the threaded hole in the valve body is communicated with the valve cavity, so that the sealing performance of the air path valve is reduced;

(4) the valve body is matched with the part and sealed by adopting a flat gasket, and after the valve body is locked by a screw, the edge of the gasket protrudes;

(5) most of valve bodies are welded sheet metal parts, so that the manufacturing cost is high and the weight is heavy.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a novel gas path switching valve which is low in cost, simple and convenient to install, good in sealing performance and long in service life.

In order to achieve the purpose, the gas path switching valve provided by the utility model has the following scheme: the switching valve comprises a valve body, wherein the valve body is provided with a gas path distribution pipe and a cylinder assembly corresponding to the gas path distribution pipe, the cylinder assembly forms surface sealing with the inner wall of the valve body through a sealing gasket, and the inner wall of the valve body is provided with an arc-shaped sealing surface.

Preferably, the cylinder assembly is provided with a throttle valve and an air joint.

Preferably, the gas path pipe is connected with the outer end surface of the valve body in a sealing manner through an O-ring, and the O-ring is positioned in an O-shaped groove on the outer end surface of the valve body.

Preferably, the valve body is an aluminum valve body.

Preferably, the gas path pipe is fixedly connected with the outer end surface of the valve body through a flange.

Preferably, the outer end face of the valve body is provided with a blind hole, the flange is provided with a through hole matched with the blind hole, and the gas path pipe and the outer end face of the valve body are fixedly connected through a fastener matched with the blind hole and the through hole.

By adopting the novel gas circuit scavenging valve, the sealing surface of the inner surface of the valve body, which is contacted with the gasket at the front end of the cylinder, adopts a special arc design, and the linear sealing is changed into the surface sealing, so that the sealing property is improved; the surface sealing structure avoids cutting the gasket by the pipe wall, and greatly prolongs the service life of the sealing gasket; the valve body is cast, so that the screw hole is prevented from being communicated with the valve cavity, and the sealing property of the valve body is improved; an O-shaped groove is formed in the end face of the valve body, and an O-shaped ring sealing structure is adopted, so that the installation is convenient; the casting valve body is made of aluminum, so that the cost is reduced, and the weight is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the novel gas path switching valve of the present invention.

Fig. 2 is a partial schematic view a of the novel gas path switching valve of the present invention.

Fig. 3 is a partial schematic view B of the novel gas path switching valve of the present invention.

Fig. 4 is a partial schematic view C of the novel gas path switching valve of the present invention.

Reference numerals

Gasket for 1 cylinder

2 throttling valve

3 gas joint

4 air cylinder component

5 valve body

6O-shaped sealing ring

7 gas path piping

8 nut

9 sealing gasket

10 Metal gasket

11 piping flange

12 fastener

13 sealing surface

Detailed Description

In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.

As shown in fig. 1 to 4, the present invention provides an embodiment of a novel air path switching valve. The switching valve comprises a valve body 5, the valve body 5 is provided with 3 paths of air path distribution pipes 7 and a group of air cylinder assemblies 4, one path of air path distribution pipe 7 corresponds to each air cylinder assembly 4, the air path distribution pipe 7 is connected with the outer end face of the valve body 5 in a sealing mode through an O-shaped sealing ring 6, and the O-shaped sealing ring 6 is located in an O-shaped groove in the outer end face of the valve body 5, so that the switching valve is more convenient to install.

As shown in fig. 1-2, the cylinder assembly 4 forms a surface seal with the inner wall of the valve body 5 through a seal gasket 9, and the outer end surface of the inner wall of the valve body 5 is provided with a sealing surface 13 in the form of a circular arc.

Because the sealing surface that the inner face of valve body contacted is convex formula, changes line seal into face seal, has avoided the cutting of pipe wall to the gasket, when improving the leakproofness, has prolonged sealed life who fills up greatly.

As shown in fig. 1, the cylinder assembly 4 is hermetically connected to one end surface of the valve body 5 through a cylinder gasket 1, and a gasket 9 and a metal gasket 10 are fixed to an axial end of the cylinder assembly 4 through a nut 8.

The valve body can adopt the casting design, the outside terminal surface of valve body set up the blind hole, the flange set up with blind hole assorted perforating hole, through with the blind hole with perforating hole assorted fastener 12, realize the gas circuit piping with the fixed connection of the outside terminal surface of valve body, avoided screw hole and valve pocket to link up, increased the leakproofness of valve body.

In a preferred embodiment, the cylinder assembly has a throttle valve 2 and an air connection 3.

In a preferred embodiment, the valve body can be an aluminum valve body, so that the weight is light and the cost can be reduced.

In a preferred embodiment, the gas pipe is fixedly connected to the outer end surface of the valve body by a pipe flange 11.

In this specification, the utility model has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the utility model. The description is thus to be regarded as illustrative instead of limiting.

Claims

1. The gas path switching valve is characterized by comprising a valve body, wherein the valve body is provided with a gas path pipe and a cylinder assembly corresponding to the gas path pipe, the cylinder assembly forms surface sealing with the inner wall of the valve body through a sealing gasket, and the inner wall of the valve body is provided with a sealing surface in the form of a circular arc.

2. The gas path switching valve of claim 1, wherein the cylinder assembly has a throttle valve and a gas joint.

3. The gas path switching valve according to claim 1, wherein the gas path pipe is sealingly connected to the outer end surface of the valve body by an O-ring, and the O-ring is disposed in an O-groove formed in the outer end surface of the valve body.

4. The gas circuit switching valve of claim 1, wherein the valve body is an aluminum valve body.

5. The gas path switching valve according to claim 1, wherein the gas path pipe is fixedly connected to the outer end surface of the valve body by a flange.

6. The gas path switching valve according to claim 5, wherein a blind hole is provided on an outer end surface of the valve body, the flange is provided with a through hole matching the blind hole, and the gas path pipe and the outer end surface of the valve body are fixedly connected by a fastening member matching the blind hole and the through hole.