Top-mounted ultralow-temperature four-eccentric butterfly valve

Abstract

The utility model relates to the technical field of low-temperature four-eccentric butterfly valves, in particular to a top-mounted ultralow-temperature four-eccentric butterfly valve, which comprises a butterfly valve body, a lower valve shaft is fixedly mounted in the butterfly valve body, a rotating component is arranged at the outer end of the lower valve shaft and comprises a cylindrical pin, the cylindrical pin is fixedly mounted outside the lower valve shaft, and the lower valve shaft is fixedly mounted on the lower valve shaft. A pin opening is formed in the outer end of the lower valve shaft, a groove is formed in the lower end of the lower valve shaft, an end cover is fixedly installed at the lower end of the groove, a sealing ring is fixedly installed at the front end of the end cover, a support is fixedly installed outside the lower valve shaft, and a filler assembly is arranged in the support. According to the top-mounted ultralow-temperature four-eccentric butterfly valve, the rotating assembly is installed, the valve shaft can drive the rotating assembly to rotate under rotation, meanwhile, the cylindrical pin is installed, the valve shaft can be fixed during rotation, the stability of the valve shaft is guaranteed, and meanwhile parts in the valve shaft can be conveniently checked and maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of cryogenic four-eccentric butterfly valves, and particularly relates to a top-mounted ultra-low temperature four-eccentric butterfly valve. Background Technique

[0002] Ultra-low temperature butterfly valves are widely used in the LNG industry. For ultra-low temperature butterfly valves used in LNG liquefied natural gas storage and loading equipment, they are generally connected to pipelines by welding. Considering the convenience of on-site maintenance and repair, it is required that ultra-low temperature butterfly valves can be repaired online.

[0003] At present, the ultra-low temperature butterfly valves at home and abroad adopt a side-mounted valve cover structure. As long as the valve cover is opened, the butterfly valve seal can be repaired and replaced online. However, the maintenance space of the valves with this structure is limited. When the valve internals are severely damaged or the valve diameter is small, the maintenance work is not easy to carry out, and the maintenance period is long, which will cause waste of user costs. Content of the Utility Model

[0004] The purpose of the utility model is to provide a top-mounted ultra-low temperature four-eccentric butterfly valve to solve the problems of small valve space and insecure sealing of ultra-low temperature butterfly valves mentioned in the above background technique. To achieve the above purpose, the utility model provides the following technical solution: A top-mounted ultra-low temperature four-eccentric butterfly valve, including a butterfly valve body, a lower valve shaft is fixedly installed inside the butterfly valve body, a rotating assembly is arranged at the outer end of the lower valve shaft, the rotating assembly includes a cylindrical pin, the cylindrical pin is fixedly installed outside the lower valve shaft, a pin hole is opened at the outer end of the lower valve shaft, a groove is opened at the lower end of the lower valve shaft, an end cover is fixedly installed at the lower end of the groove, a sealing ring is fixedly installed at the front end of the end cover, a bracket is fixedly installed outside the lower valve shaft, and a packing assembly is arranged inside the bracket. By installing the rotating assembly, the component can be driven to rotate by rotating the lower valve shaft. At the same time, the cylindrical pin is installed, which can fix the valve shaft during rotation, ensuring the stability of the valve shaft and facilitating the inspection and repair of the components inside the valve shaft.

[0005] Further preferably, the packing assembly includes a packing port, the packing port is fixedly installed at the lower end of the bracket, a packing pad is fixedly installed at the upper end of the packing port, a packing gland is fixedly installed at the upper end of the packing pad, a packing pressing plate is fixedly installed at the upper end of the packing gland, a bolt is threadedly installed above the packing pressing plate, a pipeline is fixedly communicated above the bolt, an upper valve shaft is fixedly installed at the upper end of the lower valve shaft, and a buffer assembly is arranged outside the upper valve shaft. By installing the packing assembly, materials can be filled in the gaps between the valve shaft sealing surface and other components to ensure the sealing of the valve and at the same time ensure the stability of the production system.

[0006] Further preferably, the buffer assembly includes an anti-friction pad which is fixedly installed at the lower end of the upper valve shaft. An axle sleeve is fixedly installed at the outer end of the upper valve shaft. A valve cover sealing gasket is fixedly installed at the upper end of the axle sleeve. An adjusting clamp is fixedly installed at the outer end of the axle sleeve. By installing the buffer assembly, the leakage points of the valve can be reduced and the wear of the plug cover can be effectively prevented, thus avoiding the sealing failure caused by the sinking of the valve plate component.

[0007] Further preferably, a plug cover is fixedly installed at the lower end of the lower valve shaft. A limiting groove is formed at the upper end of the plug cover. An axle sleeve dust-proof ring is fixedly installed at the outer end of the lower valve shaft. By installing the limiting groove, the valve shaft and the plug cover can be closely connected together, ensuring both the sealing performance of the butterfly valve and the accuracy of the connection.

[0008] Further preferably, a valve plate is fixedly installed above the lower valve shaft. A full-metal sealing ring is fixedly installed below the valve plate. A rotating handle is fixedly installed at the upper end of the valve plate. By installing the handle, when the valve shaft moves, the valve plate can be easily rotated, preventing hand slippage caused by direct movement.

[0009] Further preferably, an air inlet pipe is fixedly connected below the valve plate. A nut is threadedly installed at the outer end of the air inlet pipe. The air inlet pipe is directly fixed to the valve plate through the nut, improving the sealing performance of the valve.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] In the present utility model, by installing a rotating assembly, the component can be driven to rotate when the lower valve shaft rotates. At the same time, a cylindrical pin is installed to fix the valve shaft during non-rotation, ensuring the stability of the valve shaft and facilitating the inspection and maintenance of the components inside the valve shaft.

[0012] In the present utility model, by welding the valve body and the plug cover, the leakage points of the valve can be reduced. At the same time, an anti-friction pad is arranged between the valve shaft and the plug cover, and the anti-friction pad is hardened to effectively prevent the wear of the plug cover from causing the sealing failure due to the sinking of the valve plate component.

[0013] In the present utility model, by installing a groove, the valve shaft and the valve cover can be closely connected together. The groove can also play a role in fixing the valve shaft. A shoulder is designed on the upper valve shaft, which can not only increase the fixing property but also prevent blowing out. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic cross-sectional structure diagram of the present utility model Figure 1 ;

[0015] Figure 2 is a schematic three-dimensional structure diagram of the present utility model;

[0016] Figure 3 Schematic diagram of the sectional structure of the present utility model Figure 2 ;

[0017] Figure 4 For the present utility model Figure 3 Schematic diagram of the enlarged structure at position B;

[0018] Figure 5 For the present utility model Figure 1 Schematic diagram of the enlarged structure at position A;

[0019] Figure 6 For the present utility model Figure 1 Schematic diagram of the enlarged structure at position C.

[0020] In the figure: 1, butterfly valve body; 2, lower valve shaft; 3, bracket; 4, upper valve shaft; 5, plug cover; 6, limit groove; 7, rotating assembly; 8, packing assembly; 9, buffer assembly; 10, shaft sleeve dust seal; 11, valve plate; 12, all-metal sealing ring; 13, rotating handle; 701, cylindrical pin; 702, pin hole; 703, groove; 704, end cover; 705, sealing ring; 801, packing port; 802, packing gasket; 803, packing gland; 804, packing pressing plate; 805, bolt; 806, pipeline; 901, anti-friction pad; 902, shaft sleeve; 903, valve cover sealing gasket; 904, adjusting clamp; 1101, intake pipe; 1102, nut. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0022] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown in the figure, a top-mounted ultra-low temperature four-eccentric butterfly valve includes a butterfly valve body 1. Inside the butterfly valve body 1, a lower valve shaft 2 is fixedly installed. At the outer end of the lower valve shaft 2, a rotating assembly 7 is provided. The rotating assembly 7 includes a cylindrical pin 701, which is fixedly installed outside the lower valve shaft 2. At the outer end of the lower valve shaft 2, a pin opening 702 is provided. At the lower end of the lower valve shaft 2, a groove 703 is provided. At the lower end of the groove 703, an end cover 704 is fixedly installed. At the front end of the end cover 704, a sealing ring 705 is fixedly installed. Outside the lower valve shaft 2, a bracket 3 is fixedly installed. Inside the bracket 3, a packing assembly 8 is provided. By installing the rotating assembly 7, during use, the cylindrical pin 701 retracts, and the lower valve shaft 2 rotates with the valve plate 11, facilitating the inspection of internal components. At the same time, the sealing ring 705 at the front end of the end cover 704 increases the sealing performance of this assembly.

[0023] In this embodiment, as Figure 1 、 Figure 2 and Figure 3 shown, the packing assembly 8 includes a packing port 801, which is fixedly installed at the lower end of the bracket 3. At the upper end of the packing port 801, a packing gasket 802 is fixedly installed. At the upper end of the packing gasket 802, a packing gland 803 is fixedly installed. At the upper end of the packing gland 803, a packing pressing plate 804 is fixedly installed. Above the packing pressing plate 804, a bolt 805 is installed in a threaded manner. Above the bolt 805, a pipe 806 is fixedly connected. At the upper end of the lower valve shaft 2, an upper valve shaft 4 is fixedly installed. Outside the upper valve shaft 4, a buffer assembly 9 is provided. By installing the packing assembly 8, during use, the material reaches below the packing gasket 802 through the packing port 801. At the same time, the packing pressing plate 804 squeezes and seals the packing to prevent leakage, and the packing gland 803 is installed to seal the packing

[0024] In this embodiment, as Figure 1 、 Figure 2 and Figure 3 shown, the buffer assembly 9 includes an anti-friction pad 901, which is fixedly installed at the lower end of the upper valve shaft 4. At the outer end of the upper valve shaft 4, a bushing 902 is fixedly installed. At the upper end of the bushing 902, a valve cover sealing gasket 903 is fixedly installed. At the outer end of the bushing 902, an adjusting clamp 904 is fixedly installed. By installing the buffer assembly 9, during use, the bushing 902 rotates the upper valve shaft 4, and at the same time, the adjusting clamp 904 adjusts and fixes the upper valve shaft 4 to prevent the upper valve shaft 4 from shaking. At the same time, the anti-friction pad 901 can increase the buffering force between the upper valve shaft 4 and the valve plate 11.

[0025] In this embodiment, as Figure 1As shown, a plug cover 5 is fixedly installed at the lower end of the lower valve shaft 2. A limiting groove 5 is provided at the upper end of the plug cover. An outer end of the lower valve shaft 2 is fixedly installed with a shaft sleeve dust-proof ring 10. By installing the limiting groove 5, the lower valve shaft 4 and the plug cover 5 can be sealed. At the same time, by installing the shaft sleeve dust-proof ring 10, dust can be effectively prevented from entering and causing valve shaft failures.

[0026] In this embodiment, as Figure 1 shown, an air inlet pipe 1101 is fixedly connected below the valve plate 11. A nut 1102 is threadedly installed at the outer end of the air inlet pipe 1101. By installing the nut 1102, the connection between the air inlet pipe 1101 and the valve body 1 can be strengthened through the nut 1102.

[0027] The usage method and advantages of the present utility model: For this top-mounted cryogenic four-eccentric butterfly valve, during use, the working process is as follows: By welding the valve body and the plug cover, not only can the leakage points of the valve be reduced, but also the sealing performance of the butterfly valve can be increased.

[0028] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown, during use, the limiting groove 5 can seal the lower valve shaft 4 and the plug cover 5. At the same time, by installing the shaft sleeve dust-proof ring 10, dust can be effectively prevented from entering. When it is necessary to inspect the valve body 1, the cylindrical pin 701 is retracted, and the valve plate 11 is rotated by rotating the handle 13. The lower valve shaft 2 rotates along with the valve plate 11, facilitating the inspection of internal components. At the same time, the sealing ring 705 at the front end of the end cover 704 rotates the upper valve shaft 4, and the clamping hoop 904 is adjusted to fix the upper valve shaft 4 to prevent the upper valve shaft 4 from shaking. At the same time, the wear-reducing pad 901 can increase the buffering force between the valve shaft 3 and the valve plate 11. At the same time, the material reaches below the packing gasket 802 through the packing port 801. At the same time, the packing pressing plate 804 presses and seals the packing to prevent leakage, and the packing gland 803 is installed to seal the packing.

[0029] The above shows and describes the basic principles, main features and advantages of the present utility model. Technical staff in this industry should understand that the present utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A top-mounted ultra-low temperature four-eccentric butterfly valve, comprising a butterfly valve body (1), characterized in that: A lower valve shaft (2) is fixedly mounted inside the butterfly valve body (1), and a rotating assembly (7) is provided at the outer end of the lower valve shaft (2). The rotating assembly (7) includes a cylindrical pin (701), and the cylindrical pin (701) is fixedly mounted on the outside of the lower valve shaft (2). A pin hole (702) is provided at the outer end of the lower valve shaft (2), and a groove (703) is provided at the lower end of the lower valve shaft (2). An end cover (704) is fixedly mounted at the lower end of the groove (703), and a sealing ring (705) is fixedly mounted at the front end of the end cover (704). A bracket (3) is fixedly mounted on the outside of the lower valve shaft (2), and a packing assembly (8) is provided inside the bracket (3).

2. A top mounted ultra-low temperature four-eccentric butterfly valve according to claim 1, characterized in that: The packing assembly (8) comprises a packing port (801), wherein the packing port (801) is fixedly mounted on the lower end of the bracket (3), a packing pad (802) is fixedly mounted on the upper end of the packing port (801), a packing sleeve (803) is fixedly mounted on the upper end of the packing pad (802), a packing pressure plate (804) is fixedly mounted on the upper end of the packing pressure sleeve (803), a bolt (805) is threadedly mounted on the upper side of the packing pressure plate (804), a pipe (806) is fixedly connected to the upper side of the bolt (805), an upper valve shaft (4) is fixedly mounted on the upper end of the lower valve shaft (2), and a buffer assembly (9) is arranged on the outside of the upper valve shaft (4).

3. A top mounted ultra-low temperature four-eccentric butterfly valve according to claim 2, characterized in that: The buffer assembly (9) comprises a friction-reducing pad (901), wherein the friction-reducing pad (901) is fixedly mounted on the lower end of the upper valve shaft (4), a shaft sleeve (902) is fixedly mounted on the outer end of the upper valve shaft (4), a valve cover sealing gasket (903) is fixedly mounted on the upper end of the shaft sleeve (902), and an adjusting clamp (904) is fixedly mounted on the outer end of the shaft sleeve (902).

4. A top mounted ultra-low temperature four-eccentric butterfly valve according to claim 1, characterized in that: A plugging cover (5) is fixedly mounted on the lower end of the lower valve shaft (2), a limiting groove (6) is provided on the upper end of the plugging cover (5), and a shaft sleeve dust ring (10) is fixedly mounted on the outer end of the lower valve shaft (2).

5. The top-mounted ultra-low temperature four-eccentric butterfly valve according to claim 1 is characterized in that: A valve plate (11) is fixedly mounted above the lower valve shaft (2), a full metal sealing ring (12) is fixedly mounted below the valve plate (11), and a rotating handle (13) is fixedly mounted on the upper end of the valve plate (11).

6. A top mounted ultra-low temperature four-eccentric butterfly valve according to claim 5, characterized in that: An air intake pipe (1101) is fixedly connected to the lower side of the valve plate (11), and a nut (1102) is threadedly mounted on the outer end of the air intake pipe (1101).

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