CN204628596U - A kind of gas high pressure stop valve - Google Patents

Abstract

The utility model relates to a gas high-pressure cut-off valve, which includes: a main valve body D, a piston sealing mechanism A, an operating mechanism B, a switch indicating mechanism C, and the like. The piston sealing mechanism A is set in the main valve body D, and the operating mechanism B is placed on the main valve body D, and is connected with the piston sealing mechanism A through structural design to drive its operation in the main valve body D; the switch indicating mechanism C is fixed On the operating mechanism B, instructions can be realized with the action of the operating mechanism B. The high-pressure cut-off valve provided by the utility model uses the operating mechanism to control the piston mechanism to realize the connection or disconnection of the gas path, and the switch indicator mechanism realizes the indication function and human-computer interaction, and the high-pressure cut-off valve has compact structure, convenient maintenance, and simple and easy operation of the switch , with instructions, used for high-pressure gas flow channel.

Description

A gas high pressure cut-off valve

technical field

The utility model relates to a gas high-pressure cut-off valve, in particular to a piston opening mechanism, an operating mechanism and a switch indicating mechanism of the high-pressure cut-off valve.

Background technique

Globe valve, also called cut-off valve, is widely used due to the small friction between the sealing surfaces during the opening and closing process, relatively durable, small opening height, easy manufacture, and convenient maintenance.

Currently on the market, globe valves, ball valves, diaphragm valves, plunger valves, and piston valves are limited by their structure, and most of them have low pressure or low flow rate, and have no switch indicating mechanism.

Utility model content

Aiming at the problems existing in the existing cut-off valve, the purpose of the utility model is to provide a high-pressure cut-off valve with high pressure, large diameter, compact structure, convenient maintenance, simple and easy-to-operate switch, and indication.

In order to achieve the above object, the utility model adopts the following technical solutions:

A gas high-pressure cut-off valve, the cut-off valve comprising:

A main valve body, the main valve body is provided with a connected air inlet and an air outlet;

A piston sealing mechanism, the piston sealing mechanism is placed in the inner cavity of the main valve body, and the connection or cutoff between the air inlet and the air outlet in the main valve body is controlled by the movement of the piston;

An operating mechanism, the operating mechanism is connected to the main valve body, and drives to connect the piston sealing mechanism;

A switch indicating mechanism, the switch indicating mechanism is fixed on the operating mechanism, and can realize indication with the action of the operating mechanism.

In a preferred solution, the piston sealing mechanism includes a gasket, a valve stem, a seal and a valve stem support, the valve stem is placed in the inner cavity of the main valve body through the valve stem support, and can perform piston movement, and the seal The parts are set between the valve stem and the valve stem support to realize the dynamic sealing between the valve stem and the valve stem support; the gasket is embedded on the top of the valve stem, and the air inlet and the air outlet in the valve body are realized through the soft sealing structure. The interception and circulation of gas between.

Further, the sealing member includes an O-ring and a sealing ring.

Still further, the sealing rings are distributed on the upper and lower ends of the O-ring and cooperate with the O-ring.

In a preferred solution, the operating mechanism is detachably connected to the piston sealing mechanism.

Further, the operating mechanism presses the fixing piece in the piston sealing mechanism to effectively realize the sealing.

Further, the operating mechanism includes an O-ring, a valve stem, a lock nut, and a knob, the lock nut is placed on the top of the main valve body, the valve stem is threaded into the lock nut, and the O-ring Between the valve stem and the lock nut, the top of the valve stem is detachably connected to the piston sealing mechanism in the main valve body, and the top of the valve stem is connected to the knob.

Preferably, the switch indicating mechanism includes a knob limit block, a limit indicating label and a valve label, the knob limit block is arranged on the operating mechanism to control the operating position of the operating mechanism, and the limit indicating label It is arranged on the limit block of the knob, and the valve label is arranged in the operating mechanism and cooperates correspondingly with the limit indicating label on the limit block of the knob.

The structure of the gas high-pressure cut-off valve provided by the utility model has the characteristics of high pressure (31MPa), large diameter (Φ4mm), compact structure, convenient maintenance, simple and easy operation of the switch, and the characteristics of indication. Good sealing performance is not easy to leak and damage.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the structural representation of the utility model.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

Referring to Fig. 1, it shows a schematic structural view of the gas high-pressure cut-off valve provided by the utility model. It can be seen from the figure that the gas high-pressure stop valve mainly includes a main valve body D, a piston sealing mechanism A, an operating mechanism B, and a switch indicating mechanism C. The piston sealing mechanism A is arranged in the main valve body D, and the operating mechanism B is arranged in the main valve body. D, and connected with the piston sealing mechanism A through structural design, to drive its operation in the main valve body D; the switch indicating mechanism C is fixed on the operating mechanism B, and can realize the indication with the operation mechanism B.

Specifically, the main valve body D is provided with an air inlet 41, an air outlet 42, and a housing inner cavity 43, and the air inlet 41 and the air outlet 42 communicate with the housing inner cavity 43 through corresponding air passages 44, 45 respectively, thereby realizing interconnectedness of the two.

The piston sealing mechanism A includes: a sealing gasket 11 , a valve stem 12 , an O-ring 13 , a sealing ring 14 and a valve stem support 15 . The valve stem support 15 is placed in the inner cavity 43 of the main valve body D for placing the valve stem 12 . The valve stem 12 is integrally installed in the valve stem support 15, the top is provided with a bump for connection, the bottom extends into the inner cavity 43 of the main valve body D, and the end of the bottom of the valve stem 12 is embedded with a gasket 11. This constitutes a soft sealing structure, and the soft sealing structure moves with the piston of the valve stem 12 to realize the interception and circulation of gas between the air inlet 41 and the air outlet 42 in the valve body.

At the same time, the size design of the valve rod 12 makes the valve switch not affected by the direction of gas flow, and the piston design greatly reduces the force bearing area, greatly reduces the torque of the valve switch, and greatly increases the gas pressure in the valve chamber.

For a good sealing effect, an O-ring 13 and a sealing ring 14 for sealing are arranged between the valve stem 12 and the valve stem support 15, and the sealing rings are distributed at the upper and lower ends of the O-ring, that is, they are arranged sequentially from top to bottom The sealing ring, the O-ring, and the sealing ring cooperate to form the sealing member in the piston sealing mechanism A. The O-ring 13 in the seal prevents the gas in the cavity of the main valve body D from leaking out of the valve body; the seal ring 14 makes the valve stem 12 run very smoothly in the valve stem support 15, and can ensure that the gas in the valve body cavity cleanliness.

For the above-mentioned piston sealing mechanism A, the operating mechanism B is located on the upper part of the main valve body, mainly including: O-ring 21 , valve stem 22 , lock nut 23 , knob 24 , gasket 25 and screw 26 . Wherein, the lock nut 23 is connected and tightened with the main valve body D through threads, and presses the valve stem support 15 of the piston sealing mechanism A to realize sealing. The valve stem 22 is integrally installed in the lock nut 23, and the end of the bottom is provided with a connecting groove matching with the connecting protrusion on the top of the valve stem 12, through which the valve stem 12 of the piston sealing mechanism A protrudes. It is connected with the head out, which is convenient to take out the piston opening mechanism A for maintenance. At the same time, a corresponding O-ring 21 is provided on the outside of the bottom of the valve stem 22 , and the resistance of the valve stem 22 to rotate is sealed and adjusted through the O-ring 21 . The knob 24 is fixed on the top of the valve stem 22 through a washer 25 and a screw 26 .

The switch indicating mechanism C mainly includes: an inner hexagonal screw 31 , a knob limit block 32 , an inner hexagonal screw 33 , a limit indicating label 34 and a valve label 35 . Knob limit block 32 is fixed on the lock nut 23 of operating mechanism B by hexagon socket head screw 31, and hexagon socket head screw 33 utilizes the space of knob limit block 32 to control the start and stop position of knob 24 rotation during the rotation process of knob 24, limit The position indicator label 34 is pasted on the knob limit block 32, and the indicated position is displayed through a transparent window pasted on the valve label 35 of the knob 24.

The gas high-pressure cut-off valve thus constituted uses the operating mechanism to control the piston mechanism to realize the connection or disconnection of the gas path, and the switch indicating mechanism realizes the indicating function and human-computer interaction. And the high-pressure cut-off valve has compact structure, convenient maintenance, simple and easy-to-operate switch, with indication, and is used for high-pressure gas flow channels.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and modifications, and these changes and modifications all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (8)

1. A gas high-pressure shut-off valve, characterized in that the shut-off valve comprises: A main valve body, the main valve body is provided with a connected air inlet and an air outlet; A piston sealing mechanism, the piston sealing mechanism is placed in the inner cavity of the main valve body, and the connection or cutoff between the air inlet and the air outlet in the main valve body is controlled by the movement of the piston; An operating mechanism, the operating mechanism is connected to the main valve body, and drives to connect the piston sealing mechanism; A switch indicating mechanism, the switch indicating mechanism is fixed on the operating mechanism, and can realize indication with the action of the operating mechanism. 2. A gas high-pressure cut-off valve according to claim 1, wherein the piston sealing mechanism includes a gasket, a valve stem, a seal and a valve stem support, and the valve stem is placed on the main shaft through the valve stem support. In the inner cavity of the valve body, and can do piston movement, the seal is set between the valve stem and the valve stem support to realize the dynamic seal between the valve stem and the valve stem support; the gasket is embedded in the valve stem The top of the valve body realizes the cut-off and circulation of gas between the air inlet and the air outlet in the valve body through the soft sealing structure. 3. A gas high-pressure cut-off valve according to claim 2, wherein the sealing element comprises an O-ring and a sealing ring. 4. A gas high pressure cut-off valve according to claim 3, characterized in that the sealing rings are distributed on the upper and lower ends of the O-ring and cooperate with the O-ring. 5. A gas high-pressure cut-off valve according to claim 1, wherein the operating mechanism is detachably connected to the piston sealing mechanism. 6. A gas high-pressure cut-off valve according to claim 1, characterized in that, the operating mechanism presses the fixing part in the piston sealing mechanism to effectively realize the sealing. 7. A gas high-pressure cut-off valve according to claim 1, 5 or 6, wherein the operating mechanism includes an O-ring, a valve stem, a lock nut, and a knob, and the lock nut is placed on the main On the top of the valve body, the valve stem is placed in the lock nut through threads, and the O-ring is arranged between the valve stem and the lock nut. The top of the valve stem is detachably connected with the piston sealing mechanism in the main valve body. The top of the rod meets the knob. 8. A gas high-pressure cut-off valve according to claim 1, characterized in that, the switch indication mechanism includes a knob limit block, a limit indicator label and a valve label, and the knob limit block is placed at the operating position. On the mechanism, the operating position of the operating mechanism is controlled. The limit indicating label is set on the knob limit block, and the valve label is set in the operating mechanism and cooperates with the limit indicating label on the knob limit block. instruct.