CN220286473U

CN220286473U - Vacuum heat-preservation low-temperature cut-off valve

Info

Publication number: CN220286473U
Application number: CN202322265837.6U
Authority: CN
Inventors: 谢章方; 李静; 谢孙贤
Original assignee: Shanggao Group Co ltd
Current assignee: Shanggao Group Co ltd
Priority date: 2023-08-22
Filing date: 2023-08-22
Publication date: 2024-01-02
Anticipated expiration: 2033-08-22

Abstract

The application discloses vacuum insulation low temperature trip valve, it includes the valve body, gland in the valve gap at valve body top, still including set up in along the left and right directions medium circulation passageway in the valve body, set up in valve clack in the valve body, set up in lead screw nut subassembly in the valve gap, lead screw nut subassembly can drive the valve clack goes up and down, thereby realize right the switch of medium circulation passageway, the periphery of valve body is fixed and is equipped with the heat preservation clamp cover with the valve body surface forms the heat preservation clamp cover cavity, pour into heat preservation medium in the heat preservation clamp cover cavity, thereby play to play the heat preservation effect in the valve body.

Description

Vacuum heat-preservation low-temperature cut-off valve

Technical Field

The utility model relates to the technical field of shut-off valves, in particular to a vacuum heat-preservation low-temperature shut-off valve.

Background

At present, the vacuum heat-preserving low-temperature cut-off valve is widely used for storing and conveying liquid low-temperature media, such as ethylene, liquid oxygen, liquid hydrogen, liquefied Natural Gas (LNG) and other devices, has harsh working conditions, and most of working media are inflammable, explosive and high in permeability, so that the vacuum heat-preserving low-temperature cut-off valve has an extremely important effect on safe and reliable operation of low-temperature devices. The vacuum heat-insulating low-temperature cut-off valve belongs to a forced sealing valve, when the valve is closed, enough axial force must be applied to the valve clack, and the sealing can be realized only when the sealing pressure is higher than the specific pressure. The valve can provide the advantage of nearly unobstructed media flow in the open position relative to other valves controlling the passage of conduit media. The medium channel inside the valve body is straight-through, the medium flows in a straight line, and the flowing resistance is small. Compared with other types of valves, the valve is labor-saving in opening and closing, and the valve clack is perpendicular to the medium flowing direction in moving direction no matter opening or closing, so that the water hammer phenomenon is not easy to occur. The existing shut-off valve has no cold insulation and heat preservation characteristics, and is easy to freeze or solidify and crystallize when operated under a low-temperature working condition, so that the valve cannot operate.

Disclosure of Invention

In order to solve some or some technical problems existing in the prior art, the purpose of the application is to provide a vacuum heat-insulation low-temperature cut-off valve, wherein a heat-insulation jacket is arranged on the periphery of a valve body, the heat-insulation jacket is in sealing connection with the valve body, the sealing performance of a heat-insulation cavity is improved, and leakage of heat-insulation media is avoided.

In order to solve the above-mentioned existing technical problems, one of the purposes of the present application is achieved by adopting the following technical scheme:

the utility model provides a vacuum heat preservation low temperature trip valve, its include the valve body, gland in the valve gap at valve body top, still including set up in along the left and right directions medium circulation passageway in the valve body, set up in valve clack in the valve body, set up in screw nut subassembly in the valve gap, screw nut subassembly can drive the valve clack goes up and down, thereby realize right the switch of medium circulation passageway, the periphery of valve body is fixed to be equipped with the heat preservation and presss from both sides the cover with the valve body surface forms the heat preservation and presss from both sides the cover cavity, the heat preservation is pressed from both sides and is pressed from both sides the cover cavity in the injection heat preservation medium, thereby play to play the heat preservation effect in the valve body.

Further, a through hole is formed in the inner top of the circulation channel, the valve clack penetrates through the through hole, the valve clack is used for sealing the medium circulation channel, and the bottom of the screw nut component is fixedly connected with the valve clack.

Further, a V-shaped sealing filler is arranged between the screw nut component and the valve cover, and the V-shaped sealing filler is tightly matched with the screw nut component to seal the screw nut component.

Further, a packing gland is arranged at the top of the valve cover, and the packing gland plays a role in compressing the V-shaped sealing packing.

Further, the screw nut assembly comprises a supporting sleeve fixedly arranged at the top of the packing gland, a valve rod penetrates through the space between the inner side of the supporting sleeve and the packing gland and is fixedly connected with the valve clack, the top of the supporting sleeve is rotationally connected with a mounting nut, the mounting nut is in threaded connection with the valve rod, a hand wheel is fixedly sleeved outside the mounting nut, and the longitudinal sections of the supporting sleeve and the valve rod are rectangular.

Further, a slot is formed in the bottom of the valve clack, a pressure relief hole is formed in the outer side wall of the valve clack, the pressure relief hole is communicated with the slot, and the pressure relief hole is formed in the inlet end of a medium.

Compared with the prior art, the utility model has the beneficial effects that:

(1) By arranging the heat-insulating jacket, the heat-insulating jacket is arranged on the periphery of the valve body, and the heat-insulating jacket is in sealing connection with the valve body, so that the tightness of the heat-insulating cavity is improved, and leakage of heat-insulating medium is avoided. When the valve is specifically used, the heat-insulating medium is injected into the heat-insulating jacket, so that the heat-insulating jacket has a heat-insulating effect, can effectively prevent the valve from being easily frozen or the fluid medium from being easily solidified and crystallized under a low-temperature working condition, and can hinder the switching effect of the valve to influence the normal operation of the system.

Drawings

FIG. 1 is a schematic overall construction of the present application, showing a schematic construction of a lead screw nut assembly;

in the figure: 1. a valve body; 2. a valve flap; 3. a sealing gasket; 4. a valve cover; 5. v-shaped sealing filler; 6. a packing gland; 7. a valve stem; 8. installing a nut; 9. a hand wheel; 10. a through hole; 11. a heat preservation jacket cavity; 12. a lead screw nut assembly; 13. a pressure relief hole; 14. slotting; 15. a support sleeve; 16. a medium flow channel.

Detailed Description

The present application will be further described with reference to the drawings and detailed description, which should be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

In the description of the present application, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like in this application are used for distinguishing between similar objects and not for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. In the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated objects are a vacuum thermal insulation low temperature cut-off valve or.

Example 1:

as shown in fig. 1, this embodiment provides a vacuum insulation low temperature cut-off valve, it includes valve body 1, gland in valve gap 4 at valve body 1 top, still include along the medium circulation passageway 16 of opening in valve body 1 in the left and right directions, set up valve clack 2 in valve body 1, set up the lead screw nut subassembly 12 in valve gap 4, lead screw nut subassembly 12 can drive valve clack 2 and go up and down, thereby realize the switch to medium circulation passageway 16, the periphery of valve body 1 is fixed to be equipped with the insulation jacket, insulation jacket and valve body 1 surface form insulation jacket cavity 11, the injection insulation medium in the insulation jacket cavity 11, thereby play the heat preservation effect in to valve body 1.

When the shut-off valve is used, the left end and the right end of the medium circulation channel 16 are connected with the upper pipe, the upper pipe is connected, when a medium is required to be introduced into the pipe, the screw nut component 12 is operated, and the screw nut component 12 drives the valve clack 2 to move upwards, so that the medium circulation channel 16 is opened, and the medium is conveyed.

By arranging the heat-insulating jacket, the heat-insulating jacket is arranged on the periphery of the valve body 1, and the heat-insulating jacket is in sealing connection with the valve body 1, so that the tightness of the heat-insulating cavity is improved, and leakage of heat-insulating medium is avoided. When the valve is specifically used, the heat-insulating medium is injected into the heat-insulating jacket, so that the heat-insulating jacket has a heat-insulating effect, can effectively prevent the valve from being easily frozen or the fluid medium from being easily solidified and crystallized under a low-temperature working condition, and can hinder the switching effect of the valve to influence the normal operation of the system.

The front end of the heat preservation jacket is provided with a medium filling inlet, the rear end of the heat preservation jacket is provided with a medium filling outlet, and both the medium filling inlet and the medium filling outlet are provided with plug covers. When it is necessary to avoid freezing, the heat-insulating medium that can be filled may be hot water or the like, and is optionally selected as needed.

The valve cover 4 is arranged at the top of the valve body 1, so that the valve cover 4 is in threaded connection with the valve body 1, and meanwhile, the sealing gasket 3 is arranged between the valve cover 4 and the valve body 1, so that the tightness of the valve body 1 is improved.

Furthermore, a through hole 10 is formed in the inner top of the flow channel, the valve clack 2 is arranged at the through hole 10 in a penetrating way, the valve clack 2 is used for sealing a medium flow channel 16, and the bottom of the screw nut component 12 is fixedly connected with the valve clack 2.

The through hole 10 is formed in the inner top of the circulation channel, the valve clack 2 is arranged at the through hole 10 in a penetrating mode, the valve clack 2 is fixed with the screw nut component 12, the screw nut component 12 is operated, the screw nut component 12 is guaranteed to drive the valve clack 2 to lift, and the medium circulation channel 16 is opened and closed.

Further, a V-shaped sealing filler 5 is arranged between the screw nut assembly 12 and the valve cover 4, and the V-shaped sealing filler 5 and the screw nut assembly 12 are tightly matched to play a role in sealing the screw nut assembly 12.

A V-shaped sealing filler 5 is arranged between the valve rod 7 and the valve cover 4, so that the V-shaped sealing filler 5 is tightly matched with the valve rod 7 to play a role in sealing the valve rod 7.

Furthermore, a packing gland 6 is arranged at the top of the valve cover 4, and the packing gland 6 plays a role in compressing the V-shaped sealing packing 5.

The top of the valve cover 4 is provided with a packing gland 6, so that the packing gland 6 is limited and pressed on the top of the valve cover 4, and the packing gland 6 is used for pressing the V-shaped sealing packing 5.

Still further, lead screw nut subassembly 12 is including fixed support sleeve 15 that sets up in gland 6 top, runs through between support sleeve 15 inboard, gland 6 and valve gap 4 and is equipped with valve rod 7, and the bottom and the valve clack 2 fixed connection of valve rod 7, support sleeve 15 top rotation are connected with installation nut 8, and installation nut 8 and valve rod 7 threaded connection, the outside fixed cover of installation nut 8 is equipped with hand wheel 9, and the longitudinal section of support sleeve 15 and valve rod 7 all becomes the rectangle.

A supporting sleeve 15 is fixedly arranged at the top of the packing gland 6, so that the valve rod 7 penetrates through the inner side of the supporting sleeve 15 and between the packing gland 6 and the valve cover 4, then the top of the supporting sleeve 15 is rotationally connected with a mounting nut 8, the mounting nut 8 is in threaded connection with the valve rod 7, and the valve rod 7 can be stopped at any position by utilizing the self-locking property of the threads; a hand wheel 9 is fixedly sleeved outside the mounting nut 8, and the mounting nut 8 is driven to rotate by rotation of the hand wheel 9. Simultaneously, the longitudinal sections of the support sleeve 15 and the valve rod 7 are rectangular, so that the valve rod 7 is limited in lifting and lowering, and the valve rod 7 is guaranteed to do linear lifting and lowering movement.

When the valve is specifically used, the hand wheel 9 is rotated, the hand wheel 9 drives the mounting nut 8 to rotate, the mounting nut 8 rotates on the supporting sleeve 15, the mounting nut 8 drives the valve rod 7 to move, and the valve rod 7 drives the valve clack 2 to move, so that the valve clack 2 is lifted, and the valve clack lifting device is simple in structure.

Furthermore, a slot 14 is formed in the bottom of the valve clack 2, a pressure relief hole 13 is formed in the outer side wall of the valve clack 2, the pressure relief hole 13 is communicated with the slot 14, and the pressure relief hole 13 is formed in the inlet end of the medium.

Without this, the following problems can exist: when the valve is closed, residual medium in the cavity is quickly heated and gasified due to the relatively high temperature of the surrounding environment, and the pressure is rapidly increased, so that sealing leakage is caused.

The bottom of the valve clack 2 is provided with a slot 14, the outer side wall of the valve clack 2 is provided with a pressure relief hole 13, the pressure relief hole 13 is communicated with the slot 14, and gasified medium can be discharged from the pressure relief hole 13 when the temperature rising and gasification pressure is suddenly increased, so that the technical problem of sealing leakage caused by the sudden pressure rising is solved.

The above embodiments are only preferred embodiments of the present application, and the scope of the present application is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present application are intended to be within the scope of the present application.

Claims

1. The utility model provides a vacuum heat preservation low temperature trip valve, includes valve body (1), gland in valve gap (4) at valve body (1) top, its characterized in that: still including offer in the direction about medium circulation passageway (16) in valve body (1), set up in valve clack (2) in valve body (1), set up in lead screw nut subassembly (12) in valve gap (4), lead screw nut subassembly (12) can drive valve clack (2) go up and down to realize right the switch of medium circulation passageway (16), the periphery of valve body (1) is fixed and is equipped with the heat preservation clamp cover, the heat preservation clamp cover with valve body (1) surface forms heat preservation clamp cover cavity (11), pour into heat preservation medium in heat preservation clamp cover cavity (11), thereby play to play the heat preservation effect in valve body (1).

2. The vacuum insulation low temperature shut-off valve according to claim 1, wherein: the top is seted up through-hole (10) in the circulation passageway valve clack (2) run through set up in through-hole (10) department, valve clack (2) are used for sealing medium circulation passageway (16), the bottom of lead screw nut subassembly (12) with valve clack (2) fixed connection.

3. The vacuum insulation low temperature shut-off valve according to claim 2, wherein: v-shaped sealing filler (5) is arranged between the screw nut component (12) and the valve cover (4), and the V-shaped sealing filler (5) is tightly matched with the screw nut component (12) to seal the screw nut component (12).

4. A vacuum insulated low temperature shut off valve according to claim 3, wherein: the top of the valve cover (4) is provided with a packing gland (6), and the packing gland (6) plays a role in compressing the V-shaped sealing packing (5).

5. The vacuum insulation low temperature shut-off valve according to claim 4, wherein: the screw nut assembly (12) comprises a supporting sleeve (15) fixedly arranged at the top of the packing gland (6), a valve rod (7) penetrates through the space between the inner side of the supporting sleeve (15) and the packing gland (6) and the valve cover (4), the bottom of the valve rod (7) is fixedly connected with the valve clack (2), the top of the supporting sleeve (15) is rotationally connected with a mounting nut (8), the mounting nut (8) is in threaded connection with the valve rod (7), a hand wheel (9) is fixedly sleeved outside the mounting nut (8), and the longitudinal sections of the supporting sleeve (15) and the valve rod (7) are rectangular.

6. The vacuum insulation low temperature shut-off valve according to claim 1, wherein: the bottom of the valve clack (2) is provided with a slot (14), the outer side wall of the valve clack (2) is provided with a pressure relief hole (13), the pressure relief hole (13) is communicated with the slot (14), and the pressure relief hole (13) is arranged at the inlet end of a medium.