Low-temperature simple core-pulling valve

Abstract

The utility model relates to the technical field of regulating valves, and discloses a low-temperature simple core-pulling valve which comprises a valve body and a closed valve body, a lower flange plate is arranged on the outer wall of the valve body, an upper flange plate is arranged on the side, away from the valve body, of the lower flange plate, and an upper connecting pipe is fixedly connected to the outer wall of the upper flange plate. A pipe body is arranged on the side, away from the upper flange plate, of the upper connecting pipe, a lifting stud is arranged on the inner wall of the pipe body, a valve body shell is arranged on the outer wall of the lifting stud, a blocking lining is arranged on the outer wall of the valve body shell, and a storage groove is formed in the inner wall of the valve body shell. According to the low-temperature simple core-pulling valve, the fastening bolt is arranged on the outer wall of the valve body shell, so that the gasket and the pressing piece can be fixed in the storage groove through the threaded connection effect of equipment, and the situation that the sealing performance of the equipment is reduced due to the fact that the gasket falls off when the valve body shell ascends and descends can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to a low-temperature simple core-pulling valve. Background Art

[0002] Since the temperature of the medium in the cold box is usually very low, the cryogenic valve in the cold box needs to be isolated from the atmospheric environment for heat insulation. After the cryogenic valve in the cold box is installed in the pipeline, a lot of pearlescent sand is filled inside the cold box for heat insulation outside the cryogenic valve. Once the cryogenic valve in the cold box fails, it is necessary to climb up the air separation tower to inspect the valve and remove the pearlescent sand before repairing and replacing the valve internals. Inspection and maintenance are very inconvenient. Inhaling pearlescent sand is harmful to the human body and makes the operation unsafe. The cycle of cold box sand removal maintenance is long and the cost is high, which makes the maintenance cost of the cryogenic valve in the cold box high.

[0003] Most of the existing low-temperature simple core-pulling valves are fixed in a low-temperature environment. Due to the low temperature outside the pipeline, the valve is prone to adhesion with the sealing ring when it is closed. As a result, the sealing block is prone to lift and lower the sealing ring during the valve lifting process, resulting in damage to the valve sealing ring. In addition, the bushing inside the sealing block is prone to loosening during the lifting process. Therefore, a low-temperature simple core-pulling valve is proposed. Utility Model Content

[0004] The utility model provides the following technical solutions: a low-temperature simple core-pulling valve, comprising a valve body and a closed valve body, the outer wall of the valve body is provided with a lower flange, the lower flange is provided with an upper flange on the side away from the valve body, the outer wall of the upper flange is fixedly connected with an upper connecting pipe, the upper connecting pipe is provided with a tube body on the side away from the upper flange, the inner wall of the tube body is provided with a lifting stud, the outer wall of the lifting stud is provided with a valve body shell, the outer wall of the valve body shell is provided with a sealing sleeve, the inner wall of the valve body shell is provided with a storage groove, the inner wall of the storage groove is provided with a gasket, the inner wall of the storage groove is provided with a clamping plate, the outer wall of the clamping plate is provided with a fastening bolt, and the fastening bolt is fixed to the valve body shell by a threaded connection.

[0005] As an optimal technical solution of the present invention, the lifting stud is provided with a pressure pad on the side away from the valve body shell, the outer wall of the pressure pad is provided with an adjusting disk, and the outer wall of the valve body shell is provided with a leak-proof sealing ring.

[0006] As an optimal technical solution of the present invention, the outer wall of the valve body shell is sleeved with an inner sealing ring, the outer wall of the inner sealing ring is sleeved with an outer reinforcing ring, and both the outer reinforcing ring and the inner sealing ring are made of polytrifluoroethylene.

[0007] As a preferred technical solution of the present invention, the outer wall of the upper flange is provided with a plurality of fixing bolts, and the plurality of fixing bolts are symmetrically distributed on the outer wall of the upper flange, and the fixing bolts are fixed to the lower flange through threaded connection.

[0008] As an optimal technical solution of the present invention, the outer wall of the valve body is fixedly connected to a feed pipe, the valve body is provided with a discharge pipe on the side away from the feed pipe, the inner wall of the discharge pipe is fixedly connected to a pressure block, and the feed pipe and the discharge pipe are connected.

[0009] As a preferred technical solution of the present invention, the outer wall of the tube body is fixedly connected with a hexagonal connector, and the lifting stud and the hexagonal connector are fixed via a threaded connection.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This low-temperature simple core-pulling valve is equipped with fastening bolts on the outer wall of the valve body shell, so that the equipment can fix the gasket and the compression plate in the storage groove through the effect of threaded connection, thereby effectively avoiding the gasket falling off when the valve body shell is raised or lowered, which leads to a decrease in the sealing performance of the equipment.

[0012] 2. For this low-temperature simple core-pulling valve, the outer reinforcement ring can block the valve body shell when the valve body shell is raised or lowered. Since the inner wall of the outer reinforcement ring is provided with an inner sealing ring, even in extreme weather, when the outer reinforcement ring and the sealing bushing are bonded, the inner sealing ring can still seal with the closed valve body, thereby effectively avoiding the reduction of the sealing performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of a low-temperature simple core-pulling valve;

[0014] Figure 2 This is a cross-sectional view of a low-temperature simple core-pulling valve;

[0015] Figure 3 This is a structural diagram of a closed valve body in a low-temperature simple core-pulling valve;

[0016] Figure 4 This is a structural diagram of a leak-proof sealing ring in a low-temperature simple core-pulling valve.

[0017] In the figure: 1. Valve body; 2. Feed pipe; 3. Discharge pipe; 4. Lower flange; 5. Upper flange; 6. Fixing bolt; 7. Upper connecting pipe; 8. Pipe body; 9. Hexagonal connector; 10. Lifting stud; 11. Sealed valve body; 111. Valve body shell; 112. Sealing bushing; 113. Storage tank; 114. Gasket; 115. Pressure plate; 116. Fastening bolt; 12. Pressure block; 13. Adjusting disk; 14. Leak-proof sealing ring; 141. Outer reinforcement ring; 142. Inner sealing ring; 15. Pressure pad. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0019] See also Figure 1-4A low-temperature simple core-pulling valve comprises a valve body 1 and a sealed valve body 11. The outer wall of the valve body 1 is provided with a lower flange 4. The lower flange 4 is provided with an upper flange 5 on the side away from the valve body 1. The outer wall of the upper flange 5 is fixedly connected with an upper connecting pipe 7. The upper connecting pipe 7 is provided with a pipe body 8 on the side away from the upper flange 5. The inner wall of the pipe body 8 is provided with a lifting stud 10. The outer wall of the lifting stud 10 is provided with a valve body shell 111. The outer wall of the valve body shell 111 is provided with a sealing bushing 112. The inner wall of the valve body shell 111 is provided with a storage groove 113. The inner wall of the storage groove 113 is provided with a gasket 114. The inner wall of the storage groove 113 is provided with a pressing piece 115. The outer wall of the pressing piece 115 is provided with a fastening bolt 116, and the fastening bolt 116 is fixed to the valve The valve body shell 111 is fixed with each other by a threaded connection, wherein, when the valve body shell 111 is lifted or lowered, the sealing sleeve 112 outside the valve body shell 111 can seal the connection between the feed pipe 2 and the discharge pipe 3 through the sleeve connection with the valve body 1, and in the process of lifting the sealing sleeve 112, the storage groove 113 arranged inside it can also improve the sealing effect of the sealing sleeve 112 and the valve body 1 through expansion. The lifting stud 10 is provided with a pressure pad 15 on the side away from the valve body shell 111, and the outer wall of the pressure pad 15 is provided with an adjusting disk 13, and the outer wall of the valve body shell 111 is provided with a leak-proof sealing ring 14, wherein the adjusting disk 13 is provided on the outer wall of the pressure pad 15, so that when the valve is switched, the worker can directly The lifting and lowering of the valve body shell 111 is controlled by twisting the adjusting disk 13 and the threaded connection between the lifting stud 10 and the tube body 8. The outer wall of the valve body shell 111 is sleeved with an inner sealing ring 142, and the outer wall of the inner sealing ring 142 is sleeved with an outer reinforcing ring 141, and the outer reinforcing ring 141 and the inner sealing ring 142 are both made of polytrifluoroethylene, wherein polytrifluoroethylene has high temperature resistance and non-hygroscopicity and airtightness, so that when the equipment is installed, it can play a good sealing role and effectively prevent leakage. The outer wall of the upper flange 5 is provided with a plurality of fixing bolts 6, and the plurality of fixing bolts 6 are symmetrically distributed on the outer wall of the upper flange 5, and the fixing bolts 6 are fixed to the lower flange 4 by a threaded connection, wherein, in the lower method The flange 4 is connected to the outer wall of the upper flange 5 by a fixing bolt 6, which can effectively improve the stability of the equipment. The outer wall of the valve body 1 is fixedly connected to the feed pipe 2. The valve body 1 is provided with a discharge pipe 3 on the side away from the feed pipe 2. The inner wall of the discharge pipe 3 is fixedly connected with a pressure block 12. The feed pipe 2 and the discharge pipe 3 are connected. The pressure block 12 is provided on the inner wall of the discharge pipe 3 so that when the liquid flows from the feed pipe 2 to the discharge pipe 3, the pressure block 12 can play a buffering role. When the liquid is diverted, the impact force of the liquid is absorbed, thereby avoiding damage to the discharge pipe 3 due to excessive impact of the liquid flow. The outer wall of the tube body 8 is fixedly connected to the hexagonal connector 9. The lifting stud 10 is fixed to the hexagonal connector 9 by a threaded connection.By providing a hexagonal connector 9 on the outer wall of the tube body 8, when workers adjust the adjustment disk 13, the hexagonal connector 9 can play a role in connecting the force, providing a force point for workers to adjust, and facilitating the lifting and lowering of the valve body shell 111.

[0020] Working principle: when the equipment needs to be used, the worker connects the external connecting pipe to the feed pipe 2, and then the worker can twist the adjusting disk 13 so that the lifting stud 10 can drive the valve body shell 111 to rise and fall in the upper connecting pipe 7, and when the valve body shell 111 is lifted and lowered, the sealing sleeve 112 can block the feed pipe 2 during the lifting process, so that the connection between the feed pipe 2 and the discharge pipe 3 can be controlled.

[0021] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature simple core-pulling valve, comprising a valve body (1) and a closed valve body (11), characterized in that: The outer wall of the valve body (1) is provided with a lower flange (4), the lower flange (4) is provided with an upper flange (5) on a side away from the valve body (1), the outer wall of the upper flange (5) is fixedly connected with an upper connecting pipe (7), the upper connecting pipe (7) is provided with a pipe body (8) on a side away from the upper flange (5), the inner wall of the pipe body (8) is provided with a lifting stud (10), and the outer wall of the lifting stud (10) is provided with a valve body shell (111), The outer wall of the valve body shell (111) is provided with a sealing bushing (112), the inner wall of the valve body shell (111) is provided with a storage groove (113), the inner wall of the storage groove (113) is provided with a gasket (114), the inner wall of the storage groove (113) is provided with a clamping plate (115), the outer wall of the clamping plate (115) is provided with a fastening bolt (116), and the fastening bolt (116) and the valve body shell (111) are fixed by a threaded connection.

2. A low-temperature simple core-pulling valve according to claim 1, characterized in that: The lifting stud (10) is provided with a pressure pad (15) on a side away from the valve body shell (111), an adjustment disk (13) is provided on the outer wall of the pressure pad (15), and a leak-proof sealing ring (14) is provided on the outer wall of the valve body shell (111).

3. A low-temperature simple core-pulling valve according to claim 2, characterized in that: The outer wall of the valve body shell (111) is sleeved with an inner sealing ring (142), the outer wall of the inner sealing ring (142) is sleeved with an outer reinforcement ring (141), and both the outer reinforcement ring (141) and the inner sealing ring (142) are made of polytrifluoroethylene.

4. A low-temperature simple core-pulling valve according to claim 1, characterized in that: The outer wall of the upper flange (5) is provided with a plurality of fixing bolts (6), and the plurality of fixing bolts (6) are symmetrically distributed on the outer wall of the upper flange (5), and the fixing bolts (6) are fixed to the lower flange (4) through a threaded connection.

5. The low-temperature simple core-pulling valve according to claim 1, characterized in that: The outer wall of the valve body (1) is fixedly connected to a feed pipe (2), and the valve body (1) is provided with a discharge pipe (3) on a side away from the feed pipe (2). The inner wall of the discharge pipe (3) is fixedly connected to a pressure block (12), and the feed pipe (2) and the discharge pipe (3) are connected.

6. A low-temperature simple core-pulling valve according to claim 1, characterized in that: The outer wall of the tube body (8) is fixedly connected with a hexagonal connector (9), and the lifting stud (10) and the hexagonal connector (9) are fixed via a threaded connection.

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