CN212804248U

CN212804248U - Electromagnetic double-acting low-temperature explosion-proof gas emergency cut-off valve

Info

Publication number: CN212804248U
Application number: CN202021743297.8U
Authority: CN
Inventors: 范利波
Original assignee: Chongqing Panheng Valve Co ltd
Current assignee: Chongqing Panheng Valve Co ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-03-26
Anticipated expiration: 2030-08-19

Abstract

The utility model provides an electromagnetism double acting low temperature explosion-proof gas emergency cut-off valve, include: valve body, valve gap, piston, no magnet pipe, move iron core, solenoid, the valve body includes air inlet, gas outlet, the valve body passes through bolted connection with the valve gap, the junction and the piston of valve body and valve gap form a cavity, the cavity is through intercepting hole and air inlet intercommunication, no magnet pipe lower extreme and valve gap sealing connection, no magnet pipe upper end has twined solenoid, no inside movable iron core that is provided with of magnet pipe, no inside valve rod, the sliding sleeve that still is provided with of magnet pipe, movable iron core are connected to valve rod one end, and the other end passes the sliding sleeve and passes through the nut fixed with the one end of slide bar, the other end of slide bar passes the valve gap and is fixed with a sealed sliding block with the.

Description

Electromagnetic double-acting low-temperature explosion-proof gas emergency cut-off valve

Technical Field

The utility model relates to a solenoid valve field, especially an electromagnetism double acting low temperature explosion-proof gas emergency cut-off valve.

Background

The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, and is not limited to hydraulic pressure and pneumatic pressure. Used in industrial control systems to regulate the direction, flow, velocity and other parameters of a medium. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. The gas electromagnetic valve is also called a gas emergency cut-off valve, and is an actuating mechanism which is suitable for two-position on-off switching of pipelines for heating and burning media of various gases such as city gas, liquefied petroleum gas, natural gas and the like, and can automatically control the temperature.

The utility model discloses in the utility model with publication number CN207864699U, entitled "two tee bend solenoid valves of explosion-proof type" open the pilot hole through the electromagnetism and push the piston open through the fluid, reach the purpose of opening the valve, its weak point lies in: 1. after power failure, the valve cannot be normally opened or manually opened, high-pressure fluid is blocked in the valve, and when the pressure exceeds the bearing limit of the valve body, the valve body can crack or even explode, so that great potential safety hazards exist; 2. the piston achieves the purpose of pushing away or resetting by fluid and pressure change above the piston, and the piston cannot reset or push away easily due to insufficient fluid pressure, so that potential safety hazards are generated.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides an electromagnetic double-acting low-temperature explosion-proof emergency cut-off valve for gas, which can be opened by electromagnetism or manually.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an electromagnetism double-acting low temperature explosion-proof gas emergency cut-off valve, electromagnetism double-acting low temperature explosion-proof gas emergency cut-off valve includes: the three-way valve comprises a three-way valve body, a valve cover, a piston, a pilot hole, a non-magnetic pipe, a movable iron core, an electromagnetic coil, a guide rod, an overflow cover and a baffle plate;

the three-way valve body comprises a main pipeline and an installation pipeline which is perpendicular to and communicated with the main pipeline, two opposite outlets of the main pipeline are respectively an air inlet and an air outlet, the installation pipeline is provided with an installation opening, the valve cover is connected with the installation opening of the installation pipeline through a bolt, the piston is arranged in the installation pipeline in a sliding way, the installation pipeline is communicated with the air inlet through a cut-off hole which is arranged on the piston, a through hole is arranged on the piston, the cap is fixed on the piston and communicated with the through hole, a guide rod groove is fixed on the three-way valve body right below the piston, one end of the guide rod is inserted and fixed in the guide rod groove, the other end of the guide rod passes through the through hole on the piston and is sleeved with the cap in a sliding way, a pilot hole is arranged inside the guide rod, the air inlet end of the pilot hole is communicated with, the air outlet is communicated with the air outlet end of the pilot hole, two air inlet holes are formed in the side wall of the cap, the air inlet holes are higher than the air inlet end of the pilot hole and correspond to the air inlet end of the pilot hole, the lower end of the non-magnetic pipe is connected with the valve cover in a sealing mode, an electromagnetic coil is wound at the upper end of the non-magnetic pipe, a movable iron core, a valve rod and a sliding sleeve are arranged inside the non-magnetic pipe, one end of the valve rod is connected with the movable iron core, the other end of the valve rod penetrates through the sliding sleeve and is fixed with one end of a sliding rod through a nut, the other end of the sliding rod penetrates through the upper end face of the cap and extends into the cap, a sealing sliding block is fixed inside the cap, the.

Preferably, the piston is connected with the valve cover through a first return spring.

Preferably, the sealing sliding block is connected with the cap through a second return spring.

Preferably, a base is further arranged on the non-magnetic pipe, a manual rod penetrates through the base, a protruding block is fixed at one end of the manual rod and attached to the lower end face of the movable iron core, and a handle is fixed at the other end of the manual rod through a nut.

Due to the adoption of the technical scheme, the utility model discloses following advantage has: 1. when power is off due to external reasons, the electromagnetic coil of the electromagnetic valve cannot be electrified to generate electromagnetism, the valve cannot be opened, the manual rod can be rotated by rotating the handle by 90 degrees to drive the lug on the manual rod to rotate, so that the movable iron core moves upwards, the movable iron core moves upwards to drive the sealing sliding block in the cap to move upwards to open the pilot hole, the pressure of the air inlet, the cavity and the air outlet is balanced, the sealing sliding block drives the cap to move upwards, and the piston can be easily driven to move upwards in the process of moving the cap upwards to open the valve; 2. when the power is off or the handle is closed, the piston and the sealing sliding block reset under the action of the first return spring and the second return spring, so that the device is simple, convenient and safe; 3. the air inlet and the cavity are communicated all the time through the interception hole, so that the pressure of the air inlet and the pressure of the cavity are balanced all the time, and the pilot hole is convenient to open; 4. when no magnetic tube is electrified, the movable iron core is not affected.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.

Drawings

The drawings of the present invention are described below.

FIG. 1 is a schematic structural diagram of an electromagnetic double-acting low-temperature explosion-proof emergency cut-off valve for fuel gas;

FIG. 2 is an enlarged view of portion A of FIG. 1;

in the figure: 1-a three-way valve body; 2-valve cover; 3-a piston; 4-pilot hole; 5-no magnetic pipe; 6-movable iron core; 7-an electromagnetic coil; 8-an air inlet; 9-air outlet; 10-bolt; 11-installing a pipeline; 12-a cut-off hole; 13-a valve stem; 14-a sliding sleeve; 15-a slide bar; 16-sealing sliding blocks; 17-a guide rod; 18-a first return spring; 19-a second return spring; 20-an air intake; 21-air outlet holes; 22-a base; 23-a manual lever; 24-a bump; 25-a handle; 26-cap; 27-a baffle; 28-guide bar groove.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1 and 2, the utility model provides an electromagnetism double-acting low temperature explosion-proof gas emergency cut-off valve, a serial communication port, electromagnetism double-acting low temperature explosion-proof gas emergency cut-off valve includes: the three-way valve comprises a three-way valve body 1, a valve cover 2, a piston 3, a pilot hole 4, a non-magnetic pipe 5, a movable iron core 6, an electromagnetic coil 7, a guide rod 17, an overflow cover 26 and a baffle plate 27;

the three-way valve body 1 comprises a main pipeline and a mounting pipeline 11 which is perpendicular to and communicated with the main pipeline, two opposite outlets of the main pipeline are respectively an air inlet 8 and an air outlet 9, the mounting pipeline 11 is provided with a mounting port, the valve cover 2 is connected with the mounting port of the mounting pipeline 11 through a bolt 10, the piston 3 is arranged in the mounting pipeline 11 in a sliding manner, the piston 3 is provided with a cut-off hole 12, the cut-off hole 12 is used for communicating the mounting pipeline 11 with the air inlet 8, the piston 3 is provided with a through hole, the cap 26 is fixed on the piston 3 and communicated with the through hole, the three-way valve body 1 right below the piston 3 is fixed with a guide rod groove 28, one end of the guide rod 17 is inserted into and fixed in the guide rod groove 28, the other end of the guide rod 17 passes through the through hole on the piston 3 and is sleeved with the cap 26 in a sliding manner, a pilot hole 4 is arranged inside the, two air outlet holes 21 are arranged on the side wall of the guide rod 17, the air outlet holes 21 are communicated with the air outlet end of the pilot hole 4, two air inlet holes 20 are arranged on the side wall of the cap 26, the air inlet holes 20 are higher than the air inlet end of the pilot hole 4 and correspond to the air inlet end of the pilot hole 4, the lower end of the non-magnetic pipe 5 is hermetically connected with the valve cover 2, the upper end of the non-magnetic pipe 5 is wound with an electromagnetic coil 7, a movable iron core 6, a valve rod 13 and a sliding sleeve 14 are arranged in the non-magnetic pipe 5, one end of the valve rod 13 is connected with the movable iron core 6, the other end of the valve rod 13 passes through the sliding sleeve 14 and is fixed with one end of a sliding rod 15 through a nut, the other end of the slide rod 15 passes through the upper end surface of the cap 26 and extends into the cap 26 to be fixed with a sealing slide block 16, the sealing sliding block 16 is in sealing fit with the air inlet end of the pilot hole 4, and a baffle 27 for separating the air inlet 8 from the air outlet 9 is fixed in the main pipeline of the three-way valve body 1;

the electromagnetic coil 7 which is wound on the non-magnetic pipe 5 after being electrified generates electromagnetism, the movable iron core 6 is sucked upwards, the valve rod 13 drives the sealing sliding block 16 to move upwards to open the pilot hole 4, the air outlet 21 and the air inlet 20 are formed in the piston 3 and the guide rod 17 to balance the pressure of the cavity 11 and the air outlet 9, the sealing sliding block 16 moves upwards to drive the cap 26 to move upwards so as to drive the piston 3 to move upwards, the operation is easy and convenient, when the air inlet end of the pilot hole 4 is in sealing fit with the sealing sliding block 16, the air inlet 20 is not communicated with the pilot hole 4, and the sealing sliding block 16 moves upwards to drive the piston 3 to move upwards so as to open.

The piston 3 is connected to the valve cover 2 via a first return spring 18.

The sealing sliding block 16 is connected with the cap 26 through a second return spring 19; after de-energizing, piston 3 and sealing slide 16 are reset by first 18 and second 19 return springs, closing the valve.

The non-magnetic pipe 5 is further provided with a base 22, a manual rod 23 penetrates through the base 22, one end of the manual rod 23 is fixedly provided with a convex block 24, the convex block 24 is attached to the lower end face of the movable iron core 6, and the other end of the manual rod 23 is fixedly provided with a handle 25 through a nut;

when the electromagnetic coil 7 cannot be powered on due to external factors, the valve cannot be opened, the handle can be rotated by 90 degrees, so that the manual rod is rotated, the convex block on the manual rod is driven to rotate, the movable iron core moves upwards, and the valve is opened.

In the utility model, when the power is directly switched on, the electromagnetic coil 7 wound on the non-magnetic pipe 5 generates electromagnetism, the movable iron core 6 is sucked up and drives the valve rod 13 to move upwards, thereby the sealing sliding block 16 in the piston 3 is driven to move upwards through the sliding rod 15, the pilot hole 4 is firstly opened, the air inlet hole 20 is communicated with the pilot hole 4 and is communicated with the cavity 11 through the air inlet 8, thereby the pressure in the air inlet 8, the cavity 11 and the air outlet 9 is balanced, the sealing sliding block 16 moves upwards all the time to easily drive the piston 3 to move upwards, the valve is opened, the movable iron core 6 is not sucked with the non-magnetic pipe 5 wound with the electromagnetic coil 7 after the power failure, the piston 3 and the sealing 16 are reset through the first reset spring 18 and the second reset spring 19, the valve is closed, when the power failure occurs, the electromagnetic coil 7 is not switched on, the valve can not be normally opened, then the manual rotating handle, the cam 24 is driven to rotate 90 degrees to move the movable iron core 6 upwards, so that the valve is opened, the handle 25 is rotated 90 degrees again, the movable iron core 6 falls, the first return spring 18 and the second return spring 19 return the piston 3 and the sealing sliding block 16, and the valve is closed.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides an electromagnetism double-acting low temperature explosion-proof gas emergency cut-off valve which characterized in that, electromagnetism double-acting low temperature explosion-proof gas emergency cut-off valve includes: the three-way valve comprises a three-way valve body (1), a valve cover (2), a piston (3), a pilot hole (4), a non-magnetic pipe (5), a movable iron core (6), an electromagnetic coil (7), a guide rod (17), an overflow cover (26) and a baffle plate (27);

the three-way valve body (1) comprises a main pipeline and an installation pipeline (11) which is vertical to and communicated with the main pipeline, two relative outlets of the main pipeline are respectively an air inlet (8) and an air outlet (9), the installation pipeline (11) is provided with an installation port, the valve cover (2) is connected with the installation port of the installation pipeline (11) through a bolt (10), the piston (3) is arranged in the installation pipeline (11) in a sliding manner, a cut-off hole (12) is arranged on the piston (3), the installation pipeline (11) is communicated with the air inlet (8) through the cut-off hole (12), a through hole is arranged on the piston (3), the cap (26) is fixed on the piston (3) and is communicated with the through hole, a guide rod groove (28) is fixed on the three-way valve body (1) under the piston (3), one end of the guide rod (17) is inserted into and fixed in the guide rod groove (28), the other end of the guide rod (17) penetrates through a through hole in the piston (3) and is sleeved with the cap (26) in a sliding manner, a pilot hole (4) is arranged in the guide rod (17), the air inlet end of the pilot hole (4) is communicated with a cavity in the cap (26), two air outlet holes (21) are formed in the side wall of the guide rod (17), the air outlet holes (21) are communicated with the air outlet end of the pilot hole (4), two air inlet holes (20) are formed in the side wall of the cap (26), the air inlet holes (20) are higher than the air inlet end of the pilot hole (4) and correspond to the air inlet end of the pilot hole (4), the lower end of the non-magnetic pipe (5) is hermetically connected with the valve cover (2), an electromagnetic coil (7) is wound at the upper end of the non-magnetic pipe (5), a movable iron core (6), a valve rod (13) and a sliding sleeve (14) are arranged in the, the other end of the sliding rod (15) penetrates through the sliding sleeve (14) and is fixed with one end of the sliding rod (15) through a nut, the other end of the sliding rod (15) penetrates through the upper end face of the cap cover (26) and extends into the cap cover (26), a sealing sliding block (16) is fixed in the cap cover, the sealing sliding block (16) is in sealing fit with the air inlet end of the pilot hole (4), and a baffle (27) used for separating the air inlet (8) and the air outlet (9) is fixed in a main pipeline of the three-way valve body (1).

2. Electromagnetic double-acting low-temperature explosion-proof gas emergency shut-off valve according to claim 1, characterized in that the piston (3) is connected with the valve cover (2) by a first return spring (18).

3. Electromagnetic double-acting low-temperature explosion-proof gas emergency shut-off valve according to claim 1, characterized in that the sealing slide block (16) is connected with the cap (26) through a second return spring (19).

4. The electromagnetic double-acting low-temperature explosion-proof emergency cut-off valve for fuel gas as claimed in claim 1, wherein a base (22) is further arranged on the non-magnetic pipe (5), a manual rod (23) penetrates through the base (22), a protruding block (24) is fixed at one end of the manual rod (23), the protruding block (24) is attached to the lower end face of the movable iron core (6), and a handle (25) is fixed at the other end of the manual rod (23) through a nut.