CN217029960U

CN217029960U - Pneumatic stop valve

Info

Publication number: CN217029960U
Application number: CN202220749418.2U
Authority: CN
Inventors: 方丹华
Original assignee: Zhejiang Huifeng Valve Co ltd
Current assignee: Zhejiang Huifeng Valve Co ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-07-22
Anticipated expiration: 2032-04-01

Abstract

The utility model provides a pneumatic stop valve, and belongs to the technical field of stop valves. It has solved the inconvenient problem of stop valve manual closing. The pneumatic stop valve comprises a valve body, a valve cover, a valve rod and a valve clack, wherein the valve body is provided with an air inlet and an air outlet, the valve body is internally provided with a valve port, the upper end part of the valve body is provided with an assembly part which is fixedly connected with the valve body and is provided with an assembly cavity, the valve rod is wrapped in the assembly part, a separation unit which separates the assembly cavity into an upper cavity and a lower cavity is arranged in the assembly part, a first connector which is connected with the valve body and is communicated with the inside and the outside of the valve body is arranged on the peripheral wall of the valve body, which is positioned at the air inlet, the first connector is fixedly connected with the assembly part and is used for controlling the pressure difference of the assembly cavity, and a control unit which controls the opening and the closing of the valve rod is arranged between the assembly parts. The utility model has the advantage of being convenient to close.

Description

Pneumatic stop valve

Technical Field

The utility model belongs to the technical field of stop valves, and relates to a pneumatic double-control stop valve.

Background

The existing stop valve generally comprises a housing with an input port and an output port, a valve hole and a valve plate, the valve hole and the valve plate are arranged in the housing, a valve rod connected with the valve plate is arranged on the housing, the valve rod is connected with the housing through threads, and a control handle is arranged at one end, extending out of the housing, of the valve rod. When the control handle is rotated, the valve rod can drive the valve plate to move up and down. The existing stop valve is generally opened and closed by selecting a handle, the flow is larger for the stop valves with different flow sizes, and the stop valve is more difficultly closed due to the problem of pressure difference.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a stop valve which improves intelligent control and is more convenient to open and close.

The purpose of the utility model can be realized by the following technical scheme: a pneumatic stop valve comprises a valve body, a valve cover, a valve rod and a valve clack, wherein the valve body is provided with an air inlet and an air outlet, and a valve port is arranged in the valve body.

In the above pneumatic stop valve, the assembling portion is composed of a main housing and an upper cover connected to the main housing, and an extending protrusion extending axially downward and used for enhancing sealing performance is provided on a lower end surface of the upper cover.

In foretell pneumatic stop valve, the main casing body with the valve gap is an organic whole and sets up and forms, the main casing body be the setting of second grade ladder structure, the internal diameter of this main casing body from top to bottom progressively diminishes, and leaves the space between this main casing body and the valve rod, main casing body and valve rod between be provided with the cover establish with the valve rod on and be used for strengthening the seal cover of leakproofness, the main casing body be located the ladder face on be provided with rather than link firmly and be used for the spacing ring one of restriction seal cover position mutually.

In the above pneumatic stop valve, the separation unit is composed of a diaphragm, an upper limit sleeve and a lower limit sleeve, the diaphragm is sleeved on the upper end of the valve rod and is located between the upper limit sleeve and the lower limit sleeve, and the upper limit sleeve and the lower limit sleeve are in sliding fit with the main housing.

In the above pneumatic stop valve, an annular groove for facilitating installation of the diaphragm is formed in the upper end portion of the valve rod, a support ring which protrudes radially outwards and is used for supporting the diaphragm is arranged on the outer peripheral wall of the valve rod, which is located below the diaphragm, and a second limit ring which is connected with the second limit ring and is used for limiting the position of the diaphragm is arranged on the outer peripheral wall of the valve rod, which is located above the diaphragm.

In foretell pneumatic stop valve, the control unit constitute by the solenoid valve that has the controller, connect two and connect three, the solenoid valve set up on the upper cover and link firmly rather than mutually, the solenoid valve link firmly mutually with above-mentioned joint one through the trachea, joint two and connect three all set up with main casing body on, and be connected with it, the epicoele and the cavity of resorption in this main casing body are linked together outside with main casing body through connecting two respectively with joint three, joint two and joint three all through the trachea with the solenoid valve is linked together.

In foretell pneumatic stop valve, the valve body on be provided with and link firmly rather than mutually and be used for the vacuum pump of supplementary pressure boost, and this vacuum pump with the main casing body is linked together through the linkage unit, the linkage unit constitute by connecting pipe and joint four, joint four set up on the main casing body, but through two joints four epicoeles and the cavity of resorption in the main casing body are linked together with the owner, the one end of connecting pipe with connect four and be connected, and the other end of connecting pipe is connected with the vacuum pump.

Compared with the prior art, the pneumatic stop valve has the following advantages:

1. the assembly part is internally provided with a separation unit which separates the assembly cavity into an upper cavity and a lower cavity, the peripheral wall of the valve body at the air inlet is provided with a first connector which is connected with the first connector and enables the interior and the exterior of the valve body to be communicated, the first connector is fixedly connected with the assembly part and is used for controlling the pressure difference between the upper cavity and the lower cavity in the assembly cavity, and the control unit controls the opening and the closing of the valve rod through the separation unit.

Drawings

Fig. 1 is a schematic sectional view of the pneumatic stop valve.

Fig. 2 is a schematic perspective view of the solenoid valve in the pneumatic stop valve.

Fig. 3 is a schematic perspective view of the vacuum pump in the pneumatic stop valve.

In the figure, 1, a valve body; 2. a valve cover; 3. a valve stem; 4. an assembly chamber; 5. an assembling portion; 6. an upper chamber; 7. a lower cavity; 8. a first joint; 9. a main housing; 10. an upper cover; 11. an extension projection; 12. sealing sleeves; 13. a first limiting ring; 14. a diaphragm sheet; 15. an upper limit sleeve; 16. a lower limit sleeve; 17. a support ring; 18. a second limiting ring; 19. an electromagnetic valve; 20. a joint II; 21. a third joint; 22. a vacuum pump; 23. and a fourth joint.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in figures 1, 2 and 3, the pneumatic stop valve comprises a valve body with an air inlet and an air outlet, a valve cover, a valve rod and a valve clack, wherein a valve port which enables the air inlet and the air outlet to be communicated and enables the valve clack to be installed in an abutting mode is arranged in the valve body, the valve cover is fixedly connected with the valve body through a plurality of studs, the upper end portion of the valve body is provided with an assembly portion fixedly connected with the valve body and provided with an assembly cavity, the valve rod is wrapped in the assembly portion, the valve rod is connected with the valve cover in a sliding fit mode, a sealing ring for enhancing sealing performance is arranged between the valve rod and the valve cover, a separation unit which separates the assembly cavity into an upper cavity and a lower cavity is arranged in the assembly portion, a first connector which is connected with the valve body and enables the inner portion and the outer portion to be communicated with the valve body is arranged on the outer circumferential wall of the valve body at the air inlet, the first connector is fixedly connected with the assembly portion and used for controlling the pressure difference between the upper cavity and the lower cavity in the assembly cavity, the separating unit is composed of a diaphragm, an upper limiting sleeve and a lower limiting sleeve, the diaphragm is sleeved on the upper end part of the valve rod and positioned between the upper limiting sleeve and the lower limiting sleeve, the position of the diaphragm is limited by the upper limiting sleeve and the lower limiting sleeve, the upper limiting sleeve and the lower limiting sleeve are in sliding fit with the main shell, the upper limiting sleeve and the lower limiting sleeve can be fixedly connected with the main shell through a stud after being assembled, the control unit is composed of a solenoid valve with a controller, a joint II and a joint III, the solenoid valve is arranged on the upper cover and is fixedly connected with the solenoid valve, the solenoid valve is fixedly connected with the joint I through an air pipe, the joint II and the joint III are both arranged on and connected with the main shell, an upper cavity and a lower cavity in the main shell are respectively communicated with the outside of the main shell through the joint II and the joint III, the main shell body, the upper limiting sleeve and the lower limiting sleeve are respectively provided with a mounting hole for mounting a corresponding connector II and a connector III, the connector II and the connector III are communicated with the electromagnetic valve through air pipes, when the stop valve is required to be closed, the electromagnetic valve controls the connector II to be communicated with the connector I, and the inlet of the connector III is closed, so that the diaphragm sheet is pressed downwards, the valve rod is driven to slide downwards to close the valve clack, when the stop valve is required to be opened, the electromagnetic valve controls the connector III to be communicated with the connector I, the inlet of the connector II is closed, so that the diaphragm sheet rises, the valve rod is driven to slide upwards to open the valve clack, the main shell body can be provided with two check valve units for assisting pressure relief, and the corresponding upper cavity and the lower cavity can be decompressed through the check valves.

Further saying in a detailed way, for the convenience of assembly change, the assembly portion comprises the main casing body and the upper cover that is connected with the main casing body, the lower terminal surface of upper cover is provided with axial downwardly extending and is used for strengthening the extension arch of leakproofness, should extend and be provided with the sealing washer of strengthening the leakproofness between protruding and the main casing body, the main casing body with the valve gap is integrative and sets up and forms, the main casing body is the setting of second grade ladder structure, the internal diameter of this main casing body from top to bottom steadilys decrease step by step, and leave the space between the internal perisporium of this main casing body and the periphery wall of valve rod, be provided with between the main casing body and the valve rod and establish and be used for strengthening the seal cover of leakproofness on the valve rod, this seal cover is located main lesson and holds in minimum internal diameter, the main casing body is located and is provided with rather than linking firmly and be used for limiting ring one of restriction seal cover position on the ladder face.

In order to prevent the diaphragm from deviating and dislocating, a diaphragm mounting ring groove convenient to mount is formed in the upper end of the valve rod, a supporting ring protruding outwards in the radial direction and used for supporting the diaphragm is arranged on the outer peripheral wall of the valve rod located below the diaphragm, and a second limiting ring connected with the valve rod and used for limiting the position of the diaphragm is arranged on the outer peripheral wall of the valve rod located above the diaphragm.

In order to better control the lifting of the valve rod, two micro vacuum pumps which are fixedly connected with the valve body or the main shell and are used for assisting pressurization and facilitating the pressing or lifting of the diaphragm are arranged on the valve body or the main shell, the micro vacuum pumps are communicated with the upper cavity and the lower cavity in the main shell through two connecting units, each connecting unit consists of a connecting pipe and four joints, the four joints are arranged on the main shell, the upper cavity and the lower cavity in the main shell are communicated with the outside of the main body through the four joints, one end of each connecting pipe is connected with the corresponding four joints, the other end of each connecting pipe is connected with the corresponding micro vacuum pump, the micro vacuum pumps are connected with a controller on the electromagnetic valve through power wires, a display meter can be arranged on each micro vacuum pump, and the controllers can be controlled through terminal equipment, such as mobile phones and computers.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments, or alternatives may be employed, by those skilled in the art, without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. A pneumatic stop valve comprises a valve body (1) with an air inlet and an air outlet, a valve cover (2), a valve rod (3) and a valve clack, wherein a valve port is arranged in the valve body (1), it is characterized in that the upper end part of the valve body (1) is fixedly connected with the valve body and is provided with an assembly cavity (4), and an assembly part (5) which wraps the valve rod (3), wherein a separation unit which separates the assembly cavity (4) into an upper cavity (6) and a lower cavity (7) is arranged in the assembly part (5), the peripheral wall of the valve body (1) at the air inlet is provided with a first joint (8) which is connected with the valve body and enables the inside and the outside of the valve body (1) to be communicated, the first joint (8) is fixedly connected with the assembling parts (5) between the assembling parts (5), and the control unit is used for controlling the pressure difference of the assembly cavity (4) and controlling the opening and closing of the valve rod (3) through the separation unit.

2. A pneumatic stop valve according to claim 1, wherein said fitting portion (5) is composed of a main housing (9) and an upper cover (10) connected to the main housing (9), and the lower end surface of said upper cover (10) is provided with an extending projection (11) extending axially downward for enhancing the sealing property.

3. A pneumatic stop valve according to claim 2, characterized in that, the main casing body (9) with valve gap (2) are an organic whole and set up and form, the main casing body (9) be the setting of second grade ladder structure, the internal diameter of this main casing body (9) from top to bottom progressively diminishes step by step, and leaves the space between this main casing body (9) and valve rod (3), main casing body (9) and valve rod (3) between be provided with the cover establish with valve rod (3) on and be used for strengthening the sealing nature seal cover (12), main casing body (9) be located the ladder face and be provided with rather than link firmly and be used for limiting the spacing ring (13) of seal cover (12) position mutually.

4. A pneumatic stop valve as claimed in claim 3, wherein said partition unit comprises a diaphragm (14), an upper stop collar (15) and a lower stop collar (16), said diaphragm (14) is sleeved on the upper end of the valve stem (3), and said diaphragm (14) is located between said upper stop collar (15) and said lower stop collar (16), said upper stop collar (15) and said lower stop collar (16) are slidably engaged with said main housing (9).

5. A pneumatic stop valve according to claim 4, characterized in that the upper end of the valve rod (3) is provided with an annular groove for facilitating the installation of the diaphragm (14), the outer peripheral wall of the valve rod (3) at the lower part of the diaphragm (14) is provided with a supporting ring (17) which protrudes outwards in the radial direction and is used for supporting the diaphragm (14), and the outer peripheral wall of the valve rod (3) at the upper part of the diaphragm (14) is provided with a second limiting ring (18) which is connected with the second limiting ring and is used for limiting the position of the diaphragm (14).

6. The pneumatic stop valve according to claim 1, wherein the control unit comprises an electromagnetic valve (19) with a controller, a second connector (20) and a third connector (21), the electromagnetic valve (19) is arranged on the upper cover (10) and fixedly connected with the upper cover, the electromagnetic valve (19) is fixedly connected with the first connector (8) through an air pipe, the second connector (20) and the third connector (21) are both arranged on the main shell (9) and connected with the main shell, the upper cavity (6) and the lower cavity (7) in the main shell (9) are respectively communicated with the outside of the main shell (9) through the second connector (20) and the third connector (21), and the second connector (20) and the third connector (21) are both communicated with the electromagnetic valve (19) through an air pipe.

7. A pneumatic stop valve according to claim 2, characterized in that the valve body (1) is provided with a vacuum pump (22) fixedly connected therewith for assisting pressurization, and the vacuum pump (22) is communicated with the main housing (9) through a connecting unit, the connecting unit is composed of a connecting pipe and a connector four (23), the connector four (23) is arranged on the main housing (9), the upper chamber (6) and the lower chamber (7) in the main housing (9) are communicated with the outside of the main housing through two connectors four (23), one end of the connecting pipe is connected with the connector four (23), and the other end of the connecting pipe is connected with the vacuum pump (22).