CN203516753U

CN203516753U - Novel stop valve

Info

Publication number: CN203516753U
Application number: CN201320572730.XU
Authority: CN
Inventors: 洪海云
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-17
Filing date: 2013-09-17
Publication date: 2014-04-02
Anticipated expiration: 2023-09-17

Abstract

The utility model discloses a novel stop valve which comprises a valve body. A valve seat, a valve element and a valve rod are arranged in the valve body, a flow passing channel is formed in the valve seat and provided with a closing-in conical section A and a columnar section A, and the valve element is provided with a closing-in conical section B and a columnar section B, and matched with the flow passing channel of the valve seat to form an opening-closing structure. The novel stop valve further comprises a pushing device which is arranged in the valve body and located at the right end of the valve element. The pushing device is provided with a pushing cylinder, a piston is arranged in the pushing cylinder and divides the pushing cylinder into a left cavity and a right cavity, a transversely-arranged valve rod is arranged in the left cavity in a penetrated mode, the right end of the valve rod is connected with the piston, the left end of the valve rod is connected with the valve element, a transversely-arranged elastic piece is arranged in the right cavity, the right end of the elastic piece is connected with the side wall of the pushing cylinder, the left end of the elastic piece is connected with the piston, and the left cavity is connected with an external air source through a connecting pipe. The opening-closing structure of the valve element is rapid in response, and media in a pipe can be rapidly cut off and circulated; a dual-sealing structure is adopted for the opening-closing structure, the airtight effect is good, and the water leakage phenomenon is not prone to being caused after long-time use.

Description

A kind of novel cut-off valve

Technical field

The utility model relates to a kind of novel cut-off valve.

Background technique

Cut-off valve is a kind of of actuator in automatic system, many springs pneumatic diaphragn actuating mechanism or floating type piston actuator and modulating valve, consists of, and receives the signal of regulation meter, controls cut-out, connection or the switching of process pipe inner fluid.Have simple in structurely, be quick on the draw, the features such as reliable in action.Can be widely used in the industrial production sectors such as oil, chemical industry, metallurgy.The source of the gas of pneumatic cut-off valve requires filtered pressurized air, and the medium in the valve body of flowing through should be free from admixture and agranular liquids and gases.According to permissible pressure situation, medium feature and process pipe requirement, can select single seat, sleeve, threeway cut-off valve.But the spool of existing cut-off valve is easily producing the not tight problem of spool closure in switching process for a long time, easily cause and because closure is tight, do not produce leakage.

Model utility content

The problems referred to above that exist in order to solve prior art, it is a kind of better at the long-time back valve core place opening-closing structure sealing effect that uses that the utility model provides, and is difficult for producing the novel cut-off valve of revealing.

To achieve these goals, the utility model adopts following technological scheme:

A novel cut-off valve, has valve body, is provided with valve seat, spool and valve rod in valve body, and described valve seat is provided with flow channels, it is characterized in that,

Described flow channels has closing in taper section A and column section A successively along media flow direction,

Described spool has closing in taper section B and column section B successively along media flow direction, and described spool coordinates formation opening-closing structure with valve seat flow channels, also have:

Be located in valve body and be positioned at the pushing device of spool right-hand member, it has promotion cylinder, in promoting cylinder, be provided with piston, this piston is divided into left and right chamber by promotion cylinder, wears horizontal valve rod in left chamber, this valve rod right-hand member is connected with piston, left end is connected with spool, is provided with horizontal elastic component in right chamber, and this elastic component right-hand member is connected with promotion cylinder sidewall, left end is connected with described piston, and described left chamber is connected with external source of the gas by taking over;

Further: described elastic component is Compress Spring.

Further: described promotion cylinder is connected with described valve body by the support of four annular arrays.

Further: described valve body left end and right-hand member are equipped with flange-interface.

Further: described valve rod is provided with rubber seal with promotion cylinder joint.

Further: on taking over, to be provided with solenoid valve.

Further: described left chamber top is provided with pore, take over outlet end and be connected with this pore.

Compared to existing technology, the utlity model has following advantage:

(1) opening-closing structure at the utility model spool place is swift in response, can cut off fast and conducting pipeline in medium.

(2) the utility model opening-closing structure adopts double seal, and obturation effect is better, after long-time use, is not prone to water leakage phenomenon.

Accompanying drawing explanation

Fig. 1 is a kind of novel cut-out valve arrangement schematic diagram.

Fig. 2 is K place enlarged view in Fig. 1.

In figure, 1-valve body, 2-valve seat, 21-closing in taper section A, 22-column section A, 3-promotes cylinder, 31-elastic component, 32-piston, 33-seal ring A, 34-rubber seal, 4-valve rod, 5-support, 6-takes over, 7-spool, 71-closing in taper section B, 72-column section B.

Embodiment

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

As shown in Figure 1, 2, a kind of novel cut-off valve, there is valve body 1, in valve body 1, be provided with valve seat 2, spool 7 and valve rod 4, described valve seat 2 is provided with flow channels, described flow channels has closing in taper section A21 and column section A22 successively along media flow direction, and described spool has closing in taper section B71 and column section B72 successively along media flow direction, and described spool coordinates formation opening-closing structure with valve seat flow channels.

Spool coordinates formation to open and close interface with valve seat flow channels, complete the cut-out of medium and conducting, that is: closing in taper section A, column section A form a seal structure with closing in taper section B, column section B corresponding matching respectively, therefore hence one can see that, opening-closing structure has dual seal structure, and sealing effect is better.

In valve body 1 and be positioned at spool 7 right-hand members pushing device is installed, this pushing device has the cylinder 3 of promotion, in promoting cylinder 3, be provided with piston 32, this piston 32 is divided into a left side by promotion cylinder, right chamber, in left chamber, wear horizontal valve rod 4, these valve rod 4 right-hand members are connected with piston 32, left end is connected with spool 7, in right chamber, be provided with horizontal elastic component 31, these elastic component 31 right-hand members are connected with promotion cylinder sidewall, left end is connected with described piston 32, described left chamber is connected (particularly with external source of the gas by taking over 6, at left chamber top, be provided with pore, the outlet of taking over is connected with this pore, simultaneously, on taking over, be also furnished with solenoid valve).

In this case, described elastic component is Compress Spring, and elastic component also can adopt the elastomer of being made by rubber.

Fixing comparatively firm in order to promote cylinder, described promotion cylinder is connected with described valve body by the cylindrical support body 5 of four annular arrays.

This cut-off valve is equipped with flange-interface at described valve body left end and right-hand member.

In order to guarantee to form an airtight space in cylinder, described valve rod is provided with rubber seal 34 with promotion cylinder joint.Between piston and promotion cylinder sidewall, be provided with seal ring A, it is for forming seal structure between piston and promotion cylinder sidewall.

Flow channels on valve seat also comprises the column changeover portion (in valve switching process frequently, valve seat and spool work are more stable, reliable) of being located at closing in taper section A left side.

A kind of working procedure of novel cut-off valve is as follows: solenoid valve obtains electric, and pressurized gas enters left chamber, and now pressurized gas enters left chamber, and spool is separated with the flow channels of valve seat, valve opening, while piston compression elastic component, elastic component savings energy; Solenoid valve dead electricity, left chamber's gas is emptying, and elastic component resets, and promotes successively piston, valve rod and spool to left movement simultaneously, and spool and valve seat flow channels are closed, valve closing.

Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.

Claims

1. a novel cut-off valve, has valve body, is provided with valve seat, spool and valve rod in valve body, and described valve seat is provided with flow channels, it is characterized in that,

Be located in valve body and be positioned at the pushing device of spool right-hand member, it has promotion cylinder, in promoting cylinder, be provided with piston, this piston is divided into left and right chamber by promotion cylinder, wears horizontal valve rod in left chamber, this valve rod right-hand member is connected with piston, left end is connected with spool, is provided with horizontal elastic component in right chamber, and this elastic component right-hand member is connected with promotion cylinder sidewall, left end is connected with described piston, and described left chamber is connected with external source of the gas by taking over.

2. a kind of novel cut-off valve according to claim 1, is characterized in that: described elastic component is Compress Spring.

3. a kind of novel cut-off valve according to claim 1, is characterized in that: described promotion cylinder is connected with described valve body by the support of four annular arrays.

4. a kind of novel cut-off valve according to claim 1, is characterized in that: described valve body left end and right-hand member are equipped with flange-interface.

5. a kind of novel cut-off valve according to claim 1, is characterized in that: described valve rod is provided with rubber seal with promotion cylinder joint.

6. a kind of novel cut-off valve according to claim 1, is characterized in that: on taking over, be provided with solenoid valve.

7. a kind of novel cut-off valve according to claim 1, is characterized in that: described left chamber top is provided with pore, takes over outlet end and is connected with this pore.