Low-temperature butterfly valve convenient to maintain

Abstract

The low-temperature butterfly valve convenient to maintain comprises a lower valve shell and an operating handle, an upper valve shell is installed on the top of the lower valve shell, a second butt-joint plate and a first butt-joint plate are welded to the lower valve shell and the upper valve shell respectively, and locking bolts are evenly connected between the second butt-joint plate and the first butt-joint plate. By installing the operating handle and the like, the structure of the device is optimized, and a user can grasp the operating handle to adjust opening and closing of the device; after one-time operation is completed, the user can turn over the anti-slip limiting arm on the connecting base through the damping rotating shaft, so that a fixing clamping groove in the top of the anti-slip limiting arm is embedded into a reserved ring on the top of the operating handle; in this way, the device can limit and fix the operating handle of which the use state is adjusted well, the situation that the operating handle is loosened subsequently under the action of introduced airflow and the like is avoided, and the use safety of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature butterfly valves, in particular to a low-temperature butterfly valve that is easy to maintain. Background Art

[0002] Cryogenic butterfly valve is a type of valve that can be used in low-temperature working environments. It is mainly used in cryogenic pipeline systems such as liquid oxygen, liquid nitrogen, liquefied natural gas and liquid carbon dioxide. It can control the flow, pressure and temperature of cryogenic media. However, this type of cryogenic butterfly valve still has some disadvantages in its specific operation.

[0003] After completing an opening and closing operation, the low-temperature butterfly valve often stops the operating handle directly at the corresponding position without a limit structure to protect it. This causes the valve core and the operating handle to loosen due to the impact of the introduced airflow, affecting the closing effect of the butterfly valve, which leads to low safety performance of the device. In addition, the valve shell of the low-temperature butterfly valve is often an integrated structure and is not easy to be disassembled and assembled, which makes the device difficult to inspect and maintain and has low practicality. Utility Model Content

[0004] The purpose of the present utility model is to provide a low-temperature butterfly valve that is easy to maintain, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a low-temperature butterfly valve that is easy to maintain, comprising a lower valve shell and an operating handle, an upper valve shell is installed on the top of the lower valve shell, a second docking plate and a first docking plate are welded on the lower valve shell and the upper valve shell respectively, and locking bolts are evenly connected between the second docking plate and the first docking plate, the operating handle is connected to the interior of the upper valve shell and the lower valve shell, a reserved ring is welded on the top of the operating handle, and a connecting seat is welded on the top of both ends of the upper valve shell, an anti-slip limit arm is movably connected to the connecting seat, a damping shaft is provided between the anti-slip limit arm and the connecting seat, a fixed groove that is clamped with the reserved ring is provided on the top of the anti-slip limit arm, and the inner walls of the lower valve shell and the upper valve shell are both provided with low-temperature resistant ceramic protective linings.

[0006] Preferably, both ends of the lower valve housing are welded with threaded pipes for assembly, and the threaded pipes for assembly are threadedly connected with mounting flanges.

[0007] Preferably, the inner side wall of the mounting flange is provided with a low-temperature resistant silicone rubber inner layer, and a low-temperature resistant silicone rubber sealing ring is provided at the edge of one end of the mounting flange, thereby improving the low-temperature resistance and sealing performance of the mounting flange.

[0008] Preferably, edges of the second butt joint plate and the first butt joint plate are both vulcanized and connected with a rubber sealing layer.

[0009] Preferably, the top of the second docking plate is evenly provided with magnetic protrusions, and the interior of the first docking plate is provided with magnetic slots matching the magnetic protrusions, so that the device achieves the advantages of a split type and is easy to disassemble and maintain.

[0010] Preferably, the interior of the side walls of the lower valve shell and the upper valve shell are both provided with an intermediate thermal insulation layer, and the interior of the intermediate thermal insulation layer is filled with a mineral wool filling layer, which improves the thermal insulation performance of the lower valve shell and the upper valve shell.

[0011] Preferably, low-carbon austenitic stainless steel base layers are provided on both sides of the intermediate thermal insulation layer.

[0012] Preferably, low-carbon austenitic stainless steel reinforcement ribs matching the low-carbon austenitic stainless steel base layer are uniformly welded inside the intermediate thermal insulation layer, thereby improving the structural strength of the lower valve shell and the upper valve shell.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The low-temperature butterfly valve, which is easy to maintain, optimizes its own structure by installing a fixed card slot and an operating handle. The user can grasp the operating handle to adjust the opening and closing of the device. After completing an operation, the user can use the damping shaft to flip the anti-slip limit arm on the connecting seat so that the fixed card slot at the top of the anti-slip limit arm is embedded in the reserved ring at the top of the operating handle. This allows the device to limit and fix the operating handle after it has been adjusted to the use state, prevent the operating handle from being loosened under the influence of the introduced airflow, and improve the safety of the device.

[0015] (2) The low-temperature butterfly valve that is easy to maintain is installed with a second docking plate and a first docking plate, etc., so that when the device is used, on the one hand, the user can use the magnetic protrusions evenly arranged on the top of the second docking plate and the magnetic card grooves arranged inside the first docking plate and matching the magnetic protrusions to achieve the positioning, adsorption and clamping of the second docking plate and the first docking plate, and then use the locking bolts to achieve the locking and fixing of the second docking plate and the first docking plate, which makes the device achieve the advantages of split type and easy disassembly and maintenance. On the other hand, the user can use the assembly threaded pipes welded at both ends of the lower valve shell and the mounting flanges threaded on the assembly threaded pipes, so that the user can flexibly replace the mounting flanges of appropriate specifications at both ends of the lower valve shell according to the assembly requirements, and then use the low-temperature resistant silicone rubber inner layer arranged on the inner wall of the mounting flange and the low-temperature resistant silicone rubber sealing ring arranged at the edge of one end of the mounting flange, so that the device can be easily installed in a sealed manner with the corresponding low-temperature pipeline system;

[0016] (3) The low-temperature butterfly valve, which is easy to maintain, is equipped with a low-temperature resistant ceramic protective lining, etc., so that when the device is in use, the low-temperature resistant ceramic protective lining, low-carbon austenitic stainless steel base layer, intermediate thermal insulation layer, mineral wool filling layer and low-carbon austenitic stainless steel reinforcement ribs are arranged on the side walls of the lower valve shell and the upper valve shell in sequence, which not only improves the low-temperature protection effect of the inner and outer walls of the device, but also improves the thermal insulation effect of the lower valve shell and the upper valve shell through the added thermal insulation intermediate layer, avoids the mutual influence of the internal and external ambient temperatures causing the shell wall to be damaged due to the influence of cold and heat, which is conducive to extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 2 This is a rear view structural diagram of the anti-slip limit arm of the utility model;

[0019] Figure 3 This is a rear view structural diagram of the lower valve housing of the utility model in a disassembled state;

[0020] Figure 4 This is a schematic diagram of a partial cross-sectional structure of a mounting flange in a side view of the present invention;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the side wall of the lower valve housing of the present invention.

[0022] In the figure: 1. Lower valve housing; 2. Locking bolt; 3. Upper valve housing; 4. Operating handle; 5. Reserved ring; 6. Anti-slip limit arm; 7. First docking plate; 8. Mounting flange; 9. Connecting seat; 10. Damping shaft; 11. Fixing slot; 12. Second docking plate; 13. Assembly threaded pipe; 14. Magnetic convex strip; 15. Low-temperature resistant silicone rubber inner layer; 16. Low-temperature resistant silicone rubber sealing ring; 17. Low-carbon austenitic stainless steel base layer; 18. Mineral wool filling layer; 19. Low-carbon austenitic stainless steel reinforcement rib; 20. Intermediate thermal insulation layer; 21. Low-temperature resistant ceramic protective lining. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-5The utility model provides an embodiment of a low-temperature butterfly valve that is easy to maintain, comprising a lower valve housing 1 and an operating handle 4. An upper valve housing 3 is mounted on the top of the lower valve housing 1. A second docking plate 12 and a first docking plate 7 are welded to the lower valve housing 1 and the upper valve housing 3, respectively. Locking bolts 2 are evenly connected between the second docking plate 12 and the first docking plate 7.

[0025] The operating handle 4 is connected to the interior of the upper valve housing 3 and the lower valve housing 1. A reserved ring 5 is welded to the top of the operating handle 4. A connecting seat 9 is welded to the top of both ends of the upper valve housing 3. An anti-slip limit arm 6 is movably connected to the connecting seat 9. A damping shaft 10 is provided between the anti-slip limit arm 6 and the connecting seat 9. A fixed card slot 11 is provided on the top of the anti-slip limit arm 6 to engage with the reserved ring 5;

[0026] The inner side walls of the lower valve housing 1 and the upper valve housing 3 are both provided with a low-temperature resistant ceramic protective lining 21;

[0027] Both ends of the lower valve housing 1 are welded with assembly threaded pipes 13, and the assembly threaded pipes 13 are threadedly connected with mounting flanges 8; making it convenient for users to flexibly replace the mounting flanges 8 of appropriate specifications at both ends of the lower valve housing 1 according to assembly requirements;

[0028] The inner side wall of the mounting flange 8 is provided with a low-temperature resistant silicone rubber inner layer 15, and a low-temperature resistant silicone rubber sealing ring 16 is provided at the edge of one end of the mounting flange 8; thereby improving the low-temperature resistance and sealing performance of the mounting flange 8;

[0029] The edges of the second butt joint plate 12 and the first butt joint plate 7 are both vulcanized and connected with a rubber sealing layer;

[0030] The top of the second docking plate 12 is evenly provided with magnetic protrusions 14, and the interior of the first docking plate 7 is provided with magnetic slots matching the magnetic protrusions 14;

[0031] When in use, the user can utilize the magnetic ridges 14 evenly arranged on the top of the second docking plate 12 and the magnetic grooves arranged inside the first docking plate 7 and matching the magnetic ridges 14 to achieve the positioning, adsorption and clamping of the second docking plate 12 and the first docking plate 7, and then cooperate with the locking bolts 2 to achieve the locking and fixing of the second docking plate 12 and the first docking plate 7, which makes the device realize the advantages of a split type and is easy to disassemble and maintain;

[0032] The inner side walls of the lower valve housing 1 and the upper valve housing 3 are both provided with an intermediate thermal insulation layer 20, and the inner side walls of the intermediate thermal insulation layer 20 are filled with a mineral wool filling layer 18, thereby improving the thermal insulation performance of the lower valve housing 1 and the upper valve housing 3;

[0033] Both sides of the middle thermal insulation layer 20 are provided with a low-carbon austenitic stainless steel base layer 17;

[0034] Low-carbon austenitic stainless steel reinforcement ribs 19 matching the low-carbon austenitic stainless steel base layer 17 are uniformly welded inside the intermediate thermal insulation layer 20 , thereby improving the structural strength of the lower valve housing 1 and the upper valve housing 3 .

[0035] When the embodiment of the present application is in use, the user can use the assembly threaded tubes 13 welded at both ends of the lower valve shell 1, and the mounting flanges 8 threadedly connected on the assembly threaded tubes 13, so that the user can flexibly replace the mounting flanges 8 of appropriate specifications at both ends of the lower valve shell 1 according to assembly requirements, and then cooperate with the low-temperature resistant silicone rubber inner layer 15 set on the inner side wall of the mounting flange 8, and the low-temperature resistant silicone rubber sealing ring 16 set at the edge of one end of the mounting flange 8, so that the device can be easily installed in a sealed manner with the corresponding low-temperature piping system. During actual operation, the user can grasp the operating handle 4 and adjust the opening and closing of the device. After completing an operation, the user can use the damping shaft 10 to flip the anti-slip limit arm 6 on the connecting seat 9, so that the fixing groove 11 at the top of the anti-slip limit arm 6 is embedded in the reserved ring 5 at the top of the operating handle 4, which allows the device to limit and fix the operating handle 4 that has been adjusted to the use state, prevent the operating handle 4 from loosening under the influence of the introduced airflow, etc., and improve the device. The safety of use. In addition, the user can use the magnetic protrusions 14 evenly arranged on the top of the second docking plate 12 and the snap-fitting and adsorption effect between the magnetic slots arranged inside the first docking plate 7 and matching the magnetic protrusions 14 to achieve the positioning, adsorption and snap-fitting of the second docking plate 12 and the first docking plate 7, and then cooperate with the locking bolt 2 to achieve the locking and fixation of the second docking plate 12 and the first docking plate 7, which enables the device to achieve the advantages of a split type and is easy to disassemble and maintain. In addition, by sequentially arranging low-temperature resistant ceramic protective lining 21, low-carbon austenitic stainless steel base layer 17, intermediate thermal insulation layer 20, mineral wool filling layer 18 and low-carbon austenitic stainless steel reinforcement ribs 19 on the side walls of the lower valve shell 1 and the upper valve shell 3, the low-temperature protection effect of the inner and outer walls of the device is improved, and the thermal insulation effect of the lower valve shell 1 and the upper valve shell 3 is improved through the added thermal insulation intermediate layer, avoiding the mutual influence of the internal and external ambient temperatures causing the shell wall to be damaged due to the influence of cold and heat, which is conducive to extending the service life of the device.

Claims

1. A low-temperature butterfly valve that is easy to maintain, characterized in that: The invention comprises a lower valve shell (1) and an operating handle (4), wherein an upper valve shell (3) is installed on the top of the lower valve shell (1), a second docking plate (12) and a first docking plate (7) are welded to the lower valve shell (1) and the upper valve shell (3), respectively, and a locking bolt (2) is evenly connected between the second docking plate (12) and the first docking plate (7), and the operating handle (4) is connected to the inside of the upper valve shell (3) and the lower valve shell (1), and a reserved screw thread is welded on the top of the operating handle (4). Ring (5), the tops of both ends of the upper valve shell (3) are welded with connecting seats (9), the connecting seats (9) are movably connected with anti-slip limit arms (6), a damping shaft (10) is provided between the anti-slip limit arms (6) and the connecting seats (9), the top of the anti-slip limit arms (6) is provided with a fixed card groove (11) that is clamped with the reserved ring (5), and the inner side walls of the lower valve shell (1) and the upper valve shell (3) are both provided with low-temperature resistant ceramic protective linings (21).

2. The low-temperature butterfly valve that is easy to maintain according to claim 1, characterized in that: Both ends of the lower valve housing (1) are welded with assembly threaded pipes (13), and the assembly threaded pipes (13) are threadedly connected with mounting flanges (8).

3. The low-temperature butterfly valve that is easy to maintain according to claim 2, characterized in that: The inner side wall of the mounting flange (8) is provided with a low-temperature resistant silicone rubber inner layer (15), and the edge of one end of the mounting flange (8) is provided with a low-temperature resistant silicone rubber sealing ring (16).

4. The low-temperature butterfly valve easy to maintain according to claim 1, characterized in that: The edges of the second butt joint plate (12) and the first butt joint plate (7) are both vulcanized and connected with a rubber sealing layer.

5. The low-temperature butterfly valve easy to maintain according to claim 1, characterized in that: The top of the second docking plate (12) is evenly provided with magnetic protrusions (14), and the interior of the first docking plate (7) is provided with magnetic slots that match the magnetic protrusions (14).

6. The low-temperature butterfly valve easy to maintain according to claim 1, characterized in that: An intermediate thermal insulation layer (20) is provided inside the side walls of the lower valve shell (1) and the upper valve shell (3), and a mineral wool filling layer (18) is filled inside the intermediate thermal insulation layer (20).

7. The low-temperature butterfly valve easy to maintain according to claim 6, characterized in that: Low-carbon austenitic stainless steel base layers (17) are provided on both sides of the intermediate thermal insulation layer (20).

8. The low-temperature butterfly valve easy to maintain according to claim 7, characterized in that: Low-carbon austenitic stainless steel reinforcement ribs (19) matching the low-carbon austenitic stainless steel base layer (17) are uniformly welded inside the intermediate thermal insulation layer (20).

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