CN217539666U

CN217539666U - Liquefied natural gas gate valve

Info

Publication number: CN217539666U
Application number: CN202221269517.7U
Authority: CN
Inventors: 野德武; 李吉廷
Original assignee: Shaanxi Yanchang Oil And Gas Co ltd
Current assignee: Shaanxi Yanchang Oil And Gas Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-10-04
Anticipated expiration: 2032-05-24

Abstract

The utility model discloses a liquefied natural gas gate valve relates to gate valve technical field, including the UNICOM cover, the top middle part fixedly connected with fixed cover of UNICOM cover, the top middle part of UNICOM cover runs through the logical groove of seting up bar-shaped structure, and the inside of fixed cover is provided with the fly leaf, the bottom fixedly connected with baffle of fly leaf, baffle and logical groove plug-in connection, baffle and UNICOM cover looks adaptation. The utility model discloses a set up UNICOM cover and fixed cover, UNICOM cover and the inside baffle that is provided with of fixed cover, the baffle removes between UNICOM cover and fixed cover, can realize opening and shutting of gate valve, through set up the fly leaf on the top of baffle, the fly leaf can slide from top to bottom in fixed cover, can form airtight cavity between fly leaf and the UNICOM cover, the liquefied natural gas who reveals from the gap between baffle and the logical groove only can get into airtight cavity, thereby can effectually avoid liquefied natural gas to produce the influence to all the other inside subassemblies of gate valve, and can the leakproofness of certain degree promotion gate valve.

Description

Liquefied natural gas gate valve

Technical Field

The utility model relates to a gate valve technical field, in particular to liquefied natural gas gate valve.

Background

The gate valve is a shutter, the movement direction of the shutter is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. The gate valve is sealed by the contact of the valve seat and the gate plate, and the sealing surface is usually welded with metal materials to increase the wear resistance, such as welded 1Cr13, STL6, stainless steel and the like. The gate plate is divided into a rigid gate plate and an elastic gate plate according to the difference of the gate plate.

The gate valve by extensive be applied to in the control system of various industrial pipelines, there are some problems in current gate valve when being applied to liquefied natural gas, because the flashboard of gate valve needs to remove inside the gate valve, this just makes to have the gap between the sealed chamber of flashboard and gate valve, and because there is great pressure inside the liquefied natural gas pipeline, this is just so that liquefied natural gas probably gets into the intracavity of accomodating of the inside flashboard of gate valve at the in-process that the gate valve opened and shut, not only can cause certain influence to the leakproofness of gate valve, still can accelerate the damage of the inside subassembly of gate valve, and, because the gate valve sets up to whole seal structure, be difficult to discover when liquefied natural gas gets into the chamber of accomodating of flashboard, be unfavorable for the maintenance of gate valve. Therefore, it is necessary to develop a liquefied natural gas gate valve to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquefied natural gas gate valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a liquefied natural gas gate valve, includes the UNICOM cover, the fixed cover of top middle part fixedly connected with of UNICOM cover, the top middle part of UNICOM cover runs through the logical groove of seting up bar structure, the inside of fixed cover is provided with the fly leaf, the bottom fixedly connected with baffle of fly leaf, the baffle is connected with logical groove plug-in connection, baffle and UNICOM cover looks adaptation, the sealing washer of two symmetric distributions of inboard middle part fixedly connected with of UNICOM cover, the both sides of baffle are laminated with two sealing washers respectively mutually, the last surface bonding of baffle is connected with sealed the pad, sealed the pad sets up to the loop configuration, the lateral wall that seals up is laminated with the inner wall of UNICOM cover mutually, the equal bonding connection in both sides top of baffle has the rubber pad, rubber pad and logical groove looks adaptation, the outside middle part of fixed cover is provided with the manometer.

Preferably, the top end of the fixed cover is provided with a movable cover, and a square pipe is embedded in the middle of the movable cover.

Preferably, the top middle part of square pipe is inlayed and is had sealed bearing, sealed bearing's inside is provided with the lead screw.

Preferably, the upper surface middle part fixedly connected with fixed block of fly leaf, the fixed block sets up to "U" shape structure, the top middle part of fixed block is inlayed and is had the lead screw cover, lead screw and lead screw cover through connection.

Preferably, the top end of the fixed cover and the bottom end of the movable cover are both fixedly connected with connecting flanges, and the two connecting flanges are fixedly connected through locking bolts.

Preferably, the top end of the screw rod is fixedly connected with a hand wheel, and two ends of the communicating cover are fixedly connected with fixing flanges.

The utility model discloses a technological effect and advantage:

1. the utility model discloses a set up UNICOM cover and fixed cover, UNICOM cover and the inside baffle that is provided with of fixed cover, the baffle moves between UNICOM cover and fixed cover, can realize opening and shutting of gate valve, through set up the fly leaf at the top of baffle, the fly leaf can slide from top to bottom in fixed cover, can form airtight cavity between fly leaf and the UNICOM cover, the liquefied natural gas who reveals from the gap between baffle and logical groove can only get into airtight cavity, thereby can effectually avoid liquefied natural gas to produce the influence to the other subassemblies in the gate valve, and can the leakproofness of promotion gate valve to a certain extent;

2. the utility model discloses a set up the manometer at the middle part of fixed cover, when the gap between baffle and the logical groove is too big, liquefied natural gas gets into fixed cover through the gap in, the inside gas of fixed cover is compressed this moment, atmospheric pressure increase, and the manometer can detect pressure variation this moment, and then can realize surveing the baffle by liquefied natural gas's the corruption condition, has made things convenient for the maintenance and the maintenance of gate valve.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a schematic view of the communicating cover structure of the present invention.

Fig. 4 is a schematic view of the baffle structure of the present invention.

In the figure: 1. a communication cover; 2. a fixed cover; 3. a through groove; 4. a movable plate; 5. a baffle plate; 6. a seal ring; 7. a gasket; 8. a rubber pad; 9. a pressure gauge; 10. a movable cover; 11. a square tube; 12. sealing the bearing; 13. a screw rod; 14. a fixed block; 15. a screw rod sleeve; 16. a connecting flange; 17. locking the bolt; 18. a hand wheel; 19. and (5) fixing the flange.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The utility model provides a liquefied natural gas gate valve as shown in figures 1-4, which comprises a communicating cover 1, wherein the middle part of the top end of the communicating cover 1 is fixedly connected with a fixed cover 2, the middle part of the top end of the communicating cover 1 runs through a through groove 3 provided with a bar-shaped structure, a movable plate 4 is arranged inside the fixed cover 2, the bottom end of the movable plate 4 is fixedly connected with a baffle 5, the baffle 5 is spliced with the through groove 3, the baffle 5 is matched with the communicating cover 1, the middle part of the inner side of the communicating cover 1 is fixedly connected with two symmetrically distributed sealing rings 6, and two sides of the baffle 5 are respectively laminated with the two sealing rings 6;

specifically, the upper surface of the baffle 5 is connected with a sealing gasket 7 in an adhering mode, the sealing gasket 7 is arranged in an annular structure, the outer side wall of the sealing gasket 7 is attached to the inner wall of the communicating cover 1, rubber pads 8 are connected to the top ends of the two sides of the baffle 5 in an adhering mode, the rubber pads 8 are matched with the through grooves 3, the sealing performance of the baffle 5 and the groove openings of the through grooves 3 is improved due to the arrangement of the rubber pads 8, the sealing performance of the gate valve is further improved, and a pressure gauge 9 is arranged in the middle of the outer side of the fixed cover 2;

more specifically, a movable cover 10 is arranged at the top end of the fixed cover 2, a square pipe 11 is embedded in the middle of the movable cover 10, a sealing bearing 12 is embedded in the middle of the top end of the square pipe 11, a screw rod 13 is arranged inside the sealing bearing 12, a fixed block 14 is fixedly connected to the middle of the upper surface of the movable plate 4, the fixed block 14 is in an n-shaped structure, a screw rod sleeve 15 is embedded in the middle of the top end of the fixed block 14, and the screw rod 13 is in through connection with the screw rod sleeve 15;

and, the top of fixed cover 2 and the bottom of movable cover 10 all fixedly connected with flange 16, through locking bolt 17 fixed connection between two flange 16, remove locking bolt 17 and can relieve the spacing between two flange 16 to having made things convenient for to check baffle 5 and having changed, the top fixedly connected with hand wheel 18 of lead screw 13, the equal fixedly connected with flange 19 in both ends of UNICOM's cover 1, flange 19's the setting has made things convenient for the installation of gate valve.

The utility model discloses the theory of operation:

when the device is used, the hand wheel 18 is rotated, the hand wheel 18 drives the screw rod 13, the screw rod 13 is matched with the screw rod sleeve 15, so that the fixed block 14 slides up and down in the square pipe 11, the fixed block 14 can drive the movable plate 4 to move, the movable plate 4 drives the baffle 5 to move, the baffle 5 moves up and down in the through groove 3, and the opening and closing of the gate valve can be realized;

this device is in the use, when liquefied natural gas reveals through baffle 5 and the gap that leads to between the groove 3, liquefied natural gas gets into in the airtight cavity between fly leaf 4 and the UNICOM cover 1 through the gap, the sealed pad 7 that 4 upper surfaces of fly leaf set up can effectually avoid liquefied natural gas to get into fly leaf 4 top, thereby can avoid lead screw 13 and lead screw cover 15 to receive liquefied natural gas's influence, and, liquefied natural gas gets into behind the airtight cavity, the gas in the airtight cavity is compressed, atmospheric pressure increases, because the gate valve is in the state of opening this moment, fly leaf 4 is located the top of manometer 9 entry, manometer 9 can detect the atmospheric pressure in the airtight cavity this moment, through observing manometer 9's registration, can judge the corrosion conditions that baffle 5 was by liquefied natural gas.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a liquefied natural gas gate valve, includes UNICOM cover (1), its characterized in that: top middle part fixedly connected with fixed cover (2) of UNICOM cover (1), the top middle part of UNICOM cover (1) runs through logical groove (3) of seting up bar structure, the inside of fixed cover (2) is provided with fly leaf (4), bottom fixedly connected with baffle (5) of fly leaf (4), baffle (5) and logical groove (3) plug-in connection, baffle (5) and UNICOM cover (1) looks adaptation, the inboard middle part fixedly connected with sealing washer (6) of two symmetric distributions of UNICOM cover (1), the both sides of baffle (5) are laminated with two sealing washer (6) respectively, the last surface bonding of baffle (5) is connected with sealed the pad (7), sealed pad (7) set up to the annular structure, the lateral wall of sealed pad (7) is laminated with the inner wall of UNICOM cover (1) mutually, the equal bonding connection in both sides top of baffle (5) has rubber pad (8), rubber pad (8) and logical groove (3) looks adaptation, the outside middle part of fixed cover (2) is provided with manometer (9).

2. The liquefied natural gas gate valve of claim 1, wherein: the top end of the fixed cover (2) is provided with a movable cover (10), and a square pipe (11) is embedded in the middle of the movable cover (10).

3. The liquefied natural gas gate valve of claim 2, wherein: a sealing bearing (12) is embedded in the middle of the top end of the square pipe (11), and a screw rod (13) is arranged inside the sealing bearing (12).

4. The lng gate valve of claim 3, wherein: the utility model discloses a lead screw, including fly leaf (4), fixed block (14) set up to "n" shape structure, the top middle part of fixed block (14) is inlayed and is had lead screw cover (15), lead screw (13) and lead screw cover (15) through connection.

5. The liquefied natural gas gate valve according to claim 4, wherein: the top end of the fixed cover (2) and the bottom end of the movable cover (10) are fixedly connected with connecting flanges (16), and the two connecting flanges (16) are fixedly connected through locking bolts (17).

6. The liquefied natural gas gate valve according to claim 5, wherein: the top end of the screw rod (13) is fixedly connected with a hand wheel (18), and two ends of the communicating cover (1) are fixedly connected with fixing flanges (19).