Low-temperature gate valve

Abstract

The utility model discloses a low-temperature gate valve, which belongs to the technical field of gate valves and comprises a valve body, a valve cover is fixedly mounted at the top of the valve body, a hand wheel is arranged on the valve cover, two ends of the valve body are respectively and fixedly sleeved with a connecting flange, and two sides of the valve body are respectively sleeved with a transverse heat preservation box. Vertical heat preservation boxes are arranged at the top ends of the two transverse heat preservation boxes correspondingly, the two vertical heat preservation boxes are arranged on the outer sides of the valve deck and the hand wheel in a sleeving mode, and heat preservation covers are arranged at the top ends of the two vertical heat preservation boxes in a sleeving mode. In the utility model, after the gate valve is connected, the transverse heat preservation box and the vertical heat preservation box are sleeved on the outer side of the gate valve, the transverse heat preservation box and the vertical heat preservation box are fixed on the outer side of the gate valve through the matching of the buckle seat and the buckle pin, and the heat preservation covers are sleeved on the top ends of the two vertical heat preservation boxes; the whole gate valve is wrapped by the transverse heat preservation box, the vertical heat preservation box and the heat preservation cover, the gate valve is prevented from being affected by the external environment, and the practicability of the low-temperature gate valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and more specifically, to a cryogenic gate valve. Background Technology

[0002] A gate valve is an opening and closing element consisting of a gate. The direction of the gate's movement is perpendicular to the direction of fluid flow. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. Gate valves achieve sealing through the contact between the valve seat and the gate. Typically, the sealing surface is overlaid with metal material to increase wear resistance. To meet the need for gate valves to operate at low temperatures, cryogenic gate valves have been developed.

[0003] A search revealed that utility model patent CN222163620U discloses an ultra-low temperature gate valve, comprising a valve body, a gate plate slidably mounted on the valve body, a valve seat for cooperating with the gate plate to seal the gate valve, a valve stem for driving the gate plate to move, a handwheel for driving the valve stem to rotate, and a heat preservation mechanism for heat preservation of the gate valve. The heat preservation mechanism includes: a heat preservation layer wrapped around the valve body and used for sealing and heat preservation of the valve body; and an isolation component mounted on the valve body and located above the heat preservation layer. The isolation component is used to separate the uninsulated part from the insulated part and to isolate condensate generated above the isolation component. This patent uses the handwheel to drive the valve stem to rotate and drive the gate plate to slide, thereby opening or closing the valve body. The heat preservation layer wraps and insulates the valve body, and the isolation component blocks and drains the water accumulated above the isolation component in a timely manner, reducing the probability of condensate seeping into the heat preservation layer, thereby improving the heat preservation effect of the gate valve on the internal medium. However, the above patents still have the following shortcomings: they do not provide protection and insulation for the handwheel and the top of the valve cover, resulting in poor performance. In addition, it is not convenient to provide insulation and protection for the part where the valve body and the pipeline are connected. Therefore, we propose a cryogenic gate valve. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a cryogenic gate valve.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A cryogenic gate valve includes a valve body, a valve cover fixedly mounted on the top of the valve body, a handwheel provided on the valve cover, connecting flanges fixedly sleeved at both ends of the valve body, horizontal insulation boxes sleeved on both sides of the valve body, vertical insulation boxes provided at the top of each of the two horizontal insulation boxes, the two vertical insulation boxes sleeved on the outside of the valve cover and the handwheel, an insulation cover sleeved at the top of each of the two vertical insulation boxes, a fourth insulation cotton provided at the top of the inner cavity of the insulation cover, a snap-fit ​​seat provided at the top and bottom of one of the horizontal insulation boxes, a connecting seat fixedly connected at the top and bottom of the other horizontal insulation box, snap-fit ​​pins fixedly connected to the sides of multiple connecting seats, and the ends of the snap-fit ​​pins snapping into the snap-fit ​​seats.

[0007] As a preferred embodiment of this utility model, a central insulation chamber is provided inside the horizontal and vertical insulation boxes, and a first insulation cotton is fixedly sleeved on the inner wall of the central insulation chamber. The middle part of the valve body is located in the inner cavity of the central insulation chamber.

[0008] As a preferred embodiment of this utility model, a side insulation chamber is provided on the inner side of the valve body, and a second insulation cotton is fixedly sleeved on the inner wall of the side insulation chamber. The end of the valve body and the connecting flange are located in the inner cavity of the side insulation chamber.

[0009] As a preferred embodiment of this utility model, the top of the vertical insulation box is provided with an upper insulation chamber, the inner wall of the upper insulation chamber is fixedly fitted with a third insulation cotton, and the handwheel is located in the inner cavity of the upper insulation chamber.

[0010] As a preferred embodiment of this utility model, a second arc-shaped groove is provided on one side of the inner cavity of the side insulation chamber, and a third arc-shaped groove is provided on the other side of the inner cavity of the side insulation chamber. The inner wall of the third arc-shaped groove is in contact with the outer surface of the valve body.

[0011] As a preferred embodiment of this utility model, a first annular groove is provided at the bottom of the inner cavity of the upper insulation chamber, and the inner wall of the first annular groove fits against the outer side of the valve cover.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] (1) In this utility model, after the gate valve is connected, two horizontal and vertical insulation boxes are fitted on the outside of the gate valve. The horizontal and vertical insulation boxes are fixed on the outside of the gate valve by the cooperation of the buckle seat and the buckle pin. Insulation cover is fitted on the top of the two vertical insulation boxes. The horizontal insulation box, vertical insulation box and insulation cover are used to wrap the entire gate valve to avoid the gate valve being affected by the external environment and improve the practicality of the low temperature gate valve.

[0014] (2) In this utility model, the combination of the fourth insulation cotton and the third insulation cotton is used to insulate the handwheel, the second insulation cotton in the inner cavity of the side insulation chamber is used to insulate the connection of the connecting flange, and the first insulation cotton is used to insulate the connection of the valve body and the valve cover, thereby realizing the function of insulating the entire gate valve and improving the working quality of the low temperature gate valve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the overall structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the valve body of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the horizontal heat preservation box of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the heat-insulating cover of this utility model.

[0020] Explanation of the labels in the diagram:

[0021] 1. Valve body; 2. Valve cover; 3. Handwheel; 4. Connecting flange; 5. Horizontal insulation box; 6. Vertical insulation box; 7. Insulation cover; 8. Snap-on seat; 9. Connecting seat; 10. Snap-on pin; 11. Middle insulation chamber; 12. First insulation cotton; 13. Side insulation chamber; 14. Second insulation cotton; 15. Top insulation chamber; 16. Third insulation cotton; 17. Fourth insulation cotton; 18. First annular groove; 19. Second arc-shaped groove; 20. Third arc-shaped groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example:

[0026] Please see Figure 1-5 A cryogenic gate valve includes a valve body 1, a valve cover 2 fixedly installed on the top of the valve body 1, a handwheel 3 provided on the valve cover 2, connecting flanges 4 fixedly sleeved at both ends of the valve body 1, horizontal insulation boxes 5 respectively sleeved on both sides of the valve body 1, vertical insulation boxes 6 provided at the top of each of the two horizontal insulation boxes 5, the two vertical insulation boxes 6 sleeved on the outside of the valve cover 2 and the handwheel 3, insulation cover 7 sleeved at the top of the two vertical insulation boxes 6, a fourth insulation cotton 17 provided at the top of the inner cavity of the insulation cover 7, a snap-fit ​​seat 8 provided at the top and bottom of one horizontal insulation box 5, a connecting seat 9 fixedly connected at the top and bottom of the other horizontal insulation box 5, and snap-fit ​​pins 10 fixedly connected to the sides of multiple connecting seats 9, the ends of the snap-fit ​​pins 10 snapping onto the snap-fit ​​seat 8.

[0027] In this embodiment, the horizontal insulation box 5 and the vertical insulation box 6 are fixedly fitted onto the outside of the gate valve by the cooperation of the snap pin 10 and the snap seat 8. The horizontal insulation box 5 and the vertical insulation box 6 are integrally formed structures.

[0028] For details, please refer to Figures 2 to 4 A central insulation chamber 11 is provided inside the horizontal insulation box 5 and the vertical insulation box 6. The inner wall of the central insulation chamber 11 is fixedly fitted with a first insulation cotton 12, and the middle part of the valve body 1 is located in the inner cavity of the central insulation chamber 11.

[0029] In this embodiment, the first insulation cotton 12 inside the central insulation chamber 11 is used to insulate the valve body 1 and valve cover 2 located inside the central insulation chamber 11.

[0030] For details, please refer to Figures 2 to 4 A side insulation chamber 13 is provided on the inner side of the valve body 1. A second insulation cotton 14 is fixedly sleeved on the inner wall of the side insulation chamber 13. The end of the valve body 1 and the connecting flange 4 are located in the inner cavity of the side insulation chamber 13.

[0031] For details, please refer to Figures 2 to 4 The top of the vertical insulation box 6 is provided with an upper insulation chamber 15, and the inner wall of the upper insulation chamber 15 is fixedly fitted with a third insulation cotton 16. The handwheel 3 is located in the inner cavity of the upper insulation chamber 15.

[0032] In this embodiment, the third insulation cotton 16 is used to insulate the handwheel 3 located in the inner cavity of the upper insulation chamber 15.

[0033] For details, please refer to Figures 2 to 4 A second arc-shaped groove 19 is provided on one side of the inner cavity of the side insulation chamber 13, and a third arc-shaped groove 20 is provided on the other side of the inner cavity of the side insulation chamber 13. The inner wall of the third arc-shaped groove 20 is in contact with the outer surface of the valve body 1.

[0034] In this embodiment, the inner diameter of the second arc-shaped groove 19 is adapted to the outer diameter of the pipe connected to the gate valve, ensuring that other flanges connected to the connecting flange 4 are located in the inner cavity of the side insulation chamber 13 so that the second insulation cotton 14 in the inner cavity of the side insulation chamber 13 can be used for insulation.

[0035] For details, please refer to Figures 2 to 4 The bottom of the inner cavity of the upper insulation chamber 15 is provided with a first annular groove 18, and the inner wall of the first annular groove 18 fits against the outer side of the valve cover 2.

[0036] In this embodiment, the first annular groove 18 is secured to the outside of the valve cover 2, ensuring that the horizontal insulation box 5 and the vertical insulation box 6 can be stably fitted onto the valve body 1 and the valve cover 2.

[0037] Working principle: In use, firstly, the connecting flanges 4 at both ends of the valve body 1 are connected to the flanges on the external pipeline using bolts. Then, the integrated structure of the two horizontal insulation boxes 5 and the vertical insulation box 6 is fitted onto the outside of the valve body 1, valve cover 2, handwheel 3, and connecting flanges 4. At the same time, the snap pin 10 on one horizontal insulation box 5 is inserted into the snap seat 8 on the other horizontal insulation box 5, thus installing the horizontal insulation boxes 5 and vertical insulation boxes 6 on the outside of the valve body 1. At this time, the connecting flange 4 is in the correct position. The valve body 1 and valve cover 2 are located in the middle of the inner cavity of the middle insulation chamber 11, and the handwheel 3 is located in the inner cavity of the upper insulation chamber 15. Then, insulation covers 7 are installed on the top of the two vertical insulation boxes 6. The handwheel 3 is insulated by the combination of the fourth insulation cotton 17 and the third insulation cotton 16. Finally, the connection of the connecting flange 4 is insulated by the second insulation cotton 14 in the inner cavity of the side insulation chamber 13, and the connection of the valve body 1 and valve cover 2 is insulated by the first insulation cotton 12.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A cryogenic gate valve, comprising a valve body (1), characterized in that: A valve cover (2) is fixedly installed on the top of the valve body (1), and a handwheel (3) is provided on the valve cover (2). Connecting flanges (4) are fixedly sleeved on both ends of the valve body (1). Horizontal insulation boxes (5) are respectively sleeved on both sides of the valve body (1). Vertical insulation boxes (6) are provided at the top of each of the two horizontal insulation boxes (5). The two vertical insulation boxes (6) are sleeved on the outside of the valve cover (2) and the handwheel (3). 6) is fitted with a heat-insulating cover (7) at the top. The top of the inner cavity of the heat-insulating cover (7) is provided with a fourth heat-insulating cotton (17). The top and bottom of one of the horizontal heat-insulating boxes (5) are provided with a buckle seat (8). The top and bottom of the other horizontal heat-insulating box (5) are fixedly connected with a connecting seat (9). The sides of multiple connecting seats (9) are fixedly connected with buckle pins (10). The end of the buckle pin (10) is snapped onto the buckle seat (8).

2. A cryogenic gate valve according to claim 1, characterized in that: The inner sides of the horizontal insulation box (5) and the vertical insulation box (6) are provided with a central insulation chamber (11), and the inner wall of the central insulation chamber (11) is fixedly fitted with a first insulation cotton (12). The middle part of the valve body (1) is located in the inner cavity of the central insulation chamber (11).

3. A cryogenic gate valve according to claim 2, characterized in that: The valve body (1) has a side insulation chamber (13) on its inner side. The inner wall of the side insulation chamber (13) is fixedly fitted with a second insulation cotton (14). The end of the valve body (1) and the connecting flange (4) are located in the inner cavity of the side insulation chamber (13).

4. A cryogenic gate valve according to claim 1, characterized in that: The top of the vertical insulation box (6) is provided with an upper insulation chamber (15), and the inner wall of the upper insulation chamber (15) is fixedly fitted with a third insulation cotton (16). The handwheel (3) is located in the inner cavity of the upper insulation chamber (15).

5. A cryogenic gate valve according to claim 3, characterized in that: A second arc-shaped groove (19) is provided on one side of the inner cavity of the side insulation chamber (13), and a third arc-shaped groove (20) is provided on the other side of the inner cavity of the side insulation chamber (13). The inner wall of the third arc-shaped groove (20) is in contact with the outer surface of the valve body (1).

6. A cryogenic gate valve according to claim 4, characterized in that: The bottom of the inner cavity of the upper insulation chamber (15) is provided with a first annular groove (18), and the inner wall of the first annular groove (18) is in contact with the outer side of the valve cover (2).

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