CN216045470U - Emergency cut-off valve - Google Patents

Abstract

The utility model relates to the technical field of a cut-off valve, in particular to an emergency cut-off valve; the operation is convenient and labor-saving, the reaction time is short, the device can normally work in a power-off state, and the device is safer and more practical; the valve comprises a valve body, the valve rod, annular valve plate, first piston, the threaded rod, the second piston, communicating pipe and ooff valve, be provided with Z type separation board in the valve body, be provided with the annular ring on the Z type separation board, gliding setting is on the valve body about the valve rod can, annular valve plate sets up in the valve rod bottom, annular valve plate corresponds the setting with the annular ring, valve body upper portion is provided with first pressure chamber and second pressure chamber, the setting that can move about from top to bottom of first piston is in first pressure chamber, first piston bottom and valve rod top fixed connection, gliding setting is in the second pressure chamber about the second piston can, first pressure chamber and second pressure chamber pass through communicating pipe intercommunication, the top of threaded rod is provided with the regulating wheel.

Description

Emergency cut-off valve

Technical Field

The utility model relates to the technical field of shut-off valves, in particular to an emergency shut-off valve.

Background

As is known, a quick action emergency valve is a device for cutting off a conveying pipe; publication (bulletin) No. CN208719366U discloses a pneumatic trip valve of superhigh temperature for high temperature flue gas pipeline, including the pneumatic valve body that cuts off, the inside fixed mounting that the pneumatic valve body that cuts off has the valve clack, and the fracture has been seted up to the inside of valve clack, and the pneumatic top fixed mounting that cuts off the valve body has the valve barrel, and the top fixed mounting of valve barrel has the cylinder case, and the top activity of cylinder case is equipped with the cylinder lid, and the extending groove has been seted up to the lateral surface of cylinder lid. According to the ultrahigh-temperature pneumatic cut-off valve for the high-temperature flue gas pipeline, the extension rod on the outer side surface of the clamping sleeve plate is stretched out of the extension groove, so that the clamping sleeve plate can be stretched out of the outer side surface of the bearing plate, the cylinder cover is not limited when being pulled out of the outer side surface of the cylinder box, the cylinder cover can be quickly and conveniently picked, the pneumatic cut-off valve is further detached and maintained, the surface detachment time is long, and the normal use of the high-temperature flue gas pipeline is influenced; however, in use, the pneumatic cylinder is difficult to work normally in a power-off state, and in the process of cutting off the conveying pipeline, the pneumatic cylinder has long reaction time, is inconvenient to operate and has certain use limitation.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides the emergency cut-off valve which is convenient and labor-saving to operate, short in reaction time, capable of normally working in a power-off state, safe and practical.

(II) technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme: comprises a valve body, a valve rod, an annular valve plate, a first piston, a threaded rod, a second piston, a communicating pipe and a switch valve, a Z-shaped baffle plate is arranged in the valve body, an annular hole is arranged on the Z-shaped baffle plate, the valve rod is arranged on the valve body in a vertically sliding manner, the annular valve plate is arranged at the bottom of the valve rod and corresponds to the annular hole, the upper part of the valve body is provided with a first pressure cavity and a second pressure cavity, the first piston can be movably arranged in the first pressure cavity up and down, the bottom end of the first piston is fixedly connected with the top end of the valve rod, the second piston can be arranged in the second pressure cavity in a vertically sliding manner, the first pressure cavity and the second pressure cavity are communicated through a communicating pipe, the switch valve sets up on communicating pipe, the bottom spiral shell dress of threaded rod pass the valve body and with the top rotatable coupling of second piston, the top of threaded rod is provided with the regulating wheel.

Preferably, the bottom of the right end of the valve body is provided with a vent pipe, and a sealing cock is screwed on the vent pipe.

Preferably, the bottom end of the annular valve plate is provided with a sealing gasket.

Preferably, a pressure gauge is arranged on the communicating pipe.

(III) advantageous effects

Compared with the prior art, the utility model provides an emergency cut-off valve which has the following beneficial effects: the emergency cut-off valve is characterized in that the annular valve plate and the annular hole are in a closed state initially, hydraulic oil is injected into the second pressure cavity, the switch valve is opened, the adjusting wheel is rotated to enable the threaded rod to drive the second piston to move towards the top in the second pressure cavity, the hydraulic oil in the second pressure cavity enters the first pressure cavity through the communicating pipe under the action of the second piston, the first piston moves towards the upper part in the first pressure cavity, the valve rod drives the annular valve plate to move upwards, the annular valve plate is separated from the annular hole, the cut-off valve is in an opened state, the adjusting wheel is rotated again to enable the threaded rod to drive the second piston to move towards the bottom of the second pressure cavity, the second pressure cavity is in a negative pressure state, the first pressure cavity is in a positive pressure state, when an emergency occurs, the hydraulic oil in the first pressure cavity flows back into the second pressure cavity by opening the switch valve, the first piston moves downwards, the annular valve plate is closed with the annular hole, and the trip valve is closed, cuts the transport to the transport medium, and the simple operation is laborsaving, and reaction time is short, can normally work under the power-off state, and is more safe practical.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic bottom view of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2 in accordance with the present invention;

in the drawings, the reference numbers: 1. a valve body; 2. a valve stem; 3. an annular valve plate; 4. a first piston; 5. a threaded rod; 6. a second piston; 7. a communicating pipe; 8. an on-off valve; 9. a Z-shaped baffle plate; 10. an annular aperture; 11. a first pressure chamber; 12. a second pressure chamber; 13. an adjustment wheel; 14. an emptying pipe; 15. sealing the cock; 16. a gasket; 17. and a pressure gauge.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the utility model relates to an emergency cut-off valve, which comprises a valve body 1, a valve rod 2, an annular valve plate 3, a first piston 4, a threaded rod 5, a second piston 6, a communicating pipe 7 and a switch valve 8, wherein a Z-shaped baffle plate is arranged in the valve body 1, an annular hole 10 is arranged on the Z-shaped baffle plate, the valve rod 2 is arranged on the valve body 1 in a vertically sliding manner, the annular valve plate 3 is arranged at the bottom of the valve rod 2, the annular valve plate 3 is arranged corresponding to the annular hole 10, a first pressure chamber 11 and a second pressure chamber 12 are arranged at the upper part of the valve body 1, the first piston 4 is arranged in the first pressure chamber 11 in a vertically movable manner, the bottom end of the first piston 4 is fixedly connected with the top end of the valve rod 2, the second piston 6 is arranged in the second pressure chamber 12 in a vertically sliding manner, the first pressure chamber 11 is communicated with the second pressure chamber 12 through the communicating pipe 7, the switch valve 8 is arranged on the communicating pipe 7, the bottom end of the threaded rod 5 is screwed through the valve body 1 and is rotatably connected with the top end of the second piston 6, and the top end of the threaded rod 5 is provided with an adjusting wheel 13; when the annular valve plate 3 and the annular hole 10 are in a closed state initially, hydraulic oil is injected into the second pressure cavity 12, the switch valve 8 is opened, the adjusting wheel 13 is rotated, the threaded rod 5 drives the second piston 6 to move towards the top of the second pressure cavity 12, under the action of the second piston 6, the hydraulic oil in the second pressure cavity 12 enters the first pressure cavity 11 through the communicating pipe 7, the first piston 4 moves towards the upper part of the first pressure cavity 11, the valve rod 2 drives the annular valve plate 3 to move upwards, the annular valve plate 3 is separated from the annular hole 10, the stop valve is in an opened state, the adjusting wheel 13 is rotated again, the threaded rod 5 drives the second piston 6 to move towards the bottom of the second pressure cavity 12, the second pressure cavity 12 is in a negative pressure state, the first pressure cavity 11 is in a positive pressure state, when an emergency occurs, the switch valve 8 is opened, the first pressure cavity 11 is enabled to flow back into the second pressure cavity 12, first piston 4 moves down, and annular valve plate 3 and annular hole 10 are closed, and the trip valve is closed, cuts the transport to the transport medium, and the simple operation is laborsaving, and reaction time is short, but normal work under the outage state, and is more safe practical.

According to the emergency cut-off valve, the bottom of the right end of the valve body 1 is provided with the vent pipe 14, and the vent pipe 14 is provided with the sealing cock 15 in a screwed mode; hydraulic oil in the first pressure cavity 11 and the second pressure cavity 12 can be emptied and replaced through the emptying pipe 14, so that later maintenance is facilitated; the bottom end of the annular valve plate 3 is provided with a sealing gasket 16; by arranging the sealing gasket 16, the sealing performance between the annular valve plate 3 and the Z-shaped group partition plate 9 can be improved, and a better intercepting effect is achieved; a pressure gauge 17 is arranged on the communicating pipe 7; through the setting of manometer 17, can in time know the pressure size in the second pressure chamber 12, it is in normal pressure within range whether to be convenient for know it in the in-process of patrolling and examining.

When the hydraulic pressure regulating valve is used, initially, the annular valve plate 3 and the annular hole 10 are in a closed state, hydraulic oil is injected into the second pressure cavity 12, the switch valve 8 is opened, the regulating wheel 13 is rotated, the threaded rod 5 drives the second piston 6 to move towards the top in the second pressure cavity 12, under the action of the second piston 6, the hydraulic oil in the second pressure cavity 12 enters the first pressure cavity 11 through the communicating pipe 7, the first piston 4 moves towards the upper part in the first pressure cavity 11, the valve rod 2 drives the annular valve plate 3 to move upwards, the annular valve plate 3 is separated from the annular hole 10, the cut-off valve is in an opened state, the regulating wheel 13 is rotated again, the threaded rod 5 drives the second piston 6 to move towards the bottom of the second pressure cavity 12, the second pressure cavity 12 is in a negative pressure state, the first pressure cavity 11 is in a positive pressure state, when an emergency occurs, the hydraulic oil in the first pressure cavity 11 flows back into the second pressure cavity 12 by opening the switch valve 8, the first piston 4 moves downwards, the annular valve plate 3 and the annular hole 10 are closed, the cut-off valve is closed, the conveying medium is cut off and conveyed, the operation is convenient and labor-saving, the reaction time is short, the normal operation can be realized in a power-off state, and the safety and the practicability are higher; hydraulic oil in the first pressure cavity 11 and the second pressure cavity 12 can be emptied and replaced through the emptying pipe 14, so that later maintenance is facilitated; by arranging the sealing gasket 16, the sealing performance between the annular valve plate 3 and the Z-shaped group partition plate 9 can be improved, and a better intercepting effect is achieved; through the setting of manometer 17, can in time know the pressure size in the second pressure chamber 12, it is in normal pressure within range whether to be convenient for know it in the in-process of patrolling and examining.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. The emergency cut-off valve is characterized by comprising a valve body (1), a valve rod (2), an annular valve plate (3), a first piston (4), a threaded rod (5), a second piston (6), a communicating pipe (7) and a switch valve (8), wherein a Z-shaped baffle plate (9) is arranged in the valve body (1), an annular hole (10) is formed in the Z-shaped baffle plate (9), the valve rod (2) is arranged on the valve body (1) in a vertically sliding manner, the annular valve plate (3) is arranged at the bottom of the valve rod (2), the annular valve plate (3) corresponds to the annular hole (10), a first pressure cavity (11) and a second pressure cavity (12) are arranged at the upper part of the valve body (1), the first piston (4) is arranged in the first pressure cavity (11) in a vertically movable manner, the bottom end of the first piston (4) is fixedly connected with the top end of the valve rod (2), the second piston (6) can be arranged in a second pressure cavity (12) in a vertically sliding mode, the first pressure cavity (11) and the second pressure cavity (12) are communicated through a communicating pipe (7), the switch valve (8) is arranged on the communicating pipe (7), the bottom end of the threaded rod (5) penetrates through the valve body (1) in a threaded mode and is rotatably connected with the top end of the second piston (6), and the top end of the threaded rod (5) is provided with an adjusting wheel (13).

2. An emergency cut-off valve according to claim 1, characterized in that the bottom of the right end of the valve body (1) is provided with a vent pipe (14), and a sealing cock (15) is screwed on the vent pipe (14).

3. An emergency shut-off valve according to claim 2, characterised in that the bottom end of the annular valve plate (3) is provided with a sealing gasket (16).

4. An emergency shut-off valve according to claim 3, characterised in that the communicating tube (7) is provided with a pressure gauge (17).

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