A cryogenic LNG storage tank

Abstract

The present invention relates to the technical field of storage tanks, specifically to a low-temperature LNG storage tank, comprising a mounting frame, a tank body is fixedly connected to the upper end of the mounting frame, an air inlet pipe is connected through one end of the front end outer surface of the tank body, an air supply pipe is connected through the lower end of the front end outer surface of the tank body, a pressure reducing valve is fixedly connected to the front end outer surface of the tank body near the center, a boosting valve is fixedly connected to the front end outer surface of the tank body near the air supply pipe, a pressure gauge is fixedly connected to the front end outer surface of the tank body near the pressure reducing valve, and a cooling mechanism is fixedly connected to the upper end of the tank body. The present invention can monitor the pressure changes in the internal space of the tank body and respond quickly, physically cool the outside of the tank body, reduce the speed of the temperature increase inside the tank body, and then reduce the speed of the internal pressure of the tank body surging due to LNG evaporation, so as to prevent the tank body from exploding due to excessive internal pressure and improve the safety of the use of low-temperature LNG storage tanks.

Description

Technical Field

[0001] The invention relates to the technical field of storage tanks, in particular to a low-temperature LNG storage tank. Background Art

[0002] Liquefied Natural Gas (LNG for short), LNG storage tank is a professional product for storing liquefied natural gas, special equipment, Class III pressure vessel, 06Ni9DR material, after flaw detection, water pressure and air pressure test, on-site inspection by the Technical Supervision Bureau, issuing pressure vessel inspection certificate, external rust removal and painting and other processes. LNG storage tanks have strict quality appraisals on the material of pressure components, appearance dimensions and weld quality, operation quality, installation quality, internal devices and safety accessories;

[0003] Since LNG storage tanks are very large and are usually installed outdoors, the natural gas in the LNG storage tanks usually evaporates to a certain extent. The interlayer of the LNG storage tank is filled with pearlescent sand, which has a certain promoting effect on the vacuum degree of the tank. After long-term use, the pearlescent sand may settle in the interlayer, resulting in a decrease in the vacuum degree at the top of the tank, and the problem of water vapor accumulation on the top of the tank, which increases the temperature inside the tank. When the temperature outside the tank rises, the evaporation of LNG in the tank will increase greatly, and then the internal pressure of the tank will increase, so that the risk factor will increase sharply, and explosions will easily occur, posing a safety hazard. Therefore, it is necessary to cool the tank with increased evaporation to reduce safety hazards.

[0004] Therefore, a low-temperature LNG storage tank is proposed. Summary of the invention

[0005] The object of the present invention is to provide a low-temperature LNG storage tank to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a low-temperature LNG storage tank, comprising a mounting frame, the upper end of the mounting frame is fixedly connected to a tank body, one end of the front end outer surface of the tank body is penetrated by an air inlet pipe, the lower end of the front end outer surface of the tank body is penetrated by an air supply pipe, a pressure reducing valve is fixedly connected to the front end outer surface of the tank body near the center position, a boosting valve is fixedly connected to the front end outer surface of the tank body near the air supply pipe, a pressure gauge is fixedly connected to the front end outer surface of the tank body near the pressure reducing valve, and a cooling mechanism is fixedly connected to the upper end of the tank body.

[0007] Since LNG storage tanks are very large and usually installed outdoors, the natural gas in the LNG storage tanks usually evaporates to a certain extent. The interlayer of the LNG storage tank is filled with pearlescent sand, which has a certain effect on promoting the vacuum degree of the tank body. After long-term use, the pearlescent sand may settle in the interlayer, resulting in a decrease in the vacuum degree at the top of the tank body, and the problem of water vapor accumulation at the top of the tank body, which increases the temperature inside the tank body. When the temperature outside the tank increases, the evaporation of LNG in the tank will greatly increase, and then the internal pressure of the tank will increase, so that the risk factor increases sharply, and it is easy to explode. There are safety hazards, so it is necessary to cool the tank body with increased evaporation to reduce the safety hazards; the present invention sets a cooling mechanism, firstly fills LNG into the tank body through the air inlet pipe, and then adjusts the pressure in the pipe through the boost valve and the pressure reducing valve. When the LNG in the tank evaporates due to the increase in the tank temperature, the pressure in the tank increases. At this time, the pressure sensor detects that the air pressure in the tank has reached a predetermined warning value, and the cooling mechanism is used to cool the outside of the tank body, thereby reducing the temperature of the tank body and the evaporation rate of the LNG inside the tank body, thereby effectively avoiding the phenomenon of the tank body bursting due to the surge in internal pressure of the tank body.

[0008] Preferably, the cooling mechanism includes a shell, a partition, a nozzle, a water pipeline, an electric push rod, a sealing plate and a pressure sensor, the upper end of the tank body is fixedly connected to the shell, the inner side surface of the shell is fixedly connected to a partition near the middle position, the space formed by the upper surface of the partition and the shell is filled with cooling water, the lower surface of the shell is penetrated and fixedly connected with evenly distributed nozzles near the edge position, two water pipelines are penetrated and fixedly connected on both ends of the upper surface of the partition near the edge position, the lower ends of the two water pipelines are slidably connected with sealing plates near the opening position, the lower end of the sealing plate is fixedly connected to the electric push rod, the lower end of the electric push rod penetrates the shell and is fixedly connected to the tank body, the upper end of the tank body is penetrated and fixedly connected with a pressure sensor near the shell, and the pressure sensor is fixedly connected to the electric push rod through an electrical signal.

[0009] In order to achieve the effect of lowering the temperature of the outer surface of the tank, the present invention sets components such as pressure sensors. When LNG in the tank evaporates due to the increase in the tank temperature, the pressure in the tank increases. At this time, the pressure sensor detects that the air pressure in the tank has reached a predetermined warning value, and the processor analyzes and transmits the electrical signal to the electric push rod, so that the electric push rod is started, and the electric push rod pulls down the sealing plate. During the downward movement of the sealing plate, the lower end opening inside the water pipe can smoothly allow the cooling water in the upper space of the partition to enter the space of the lower layer of the partition, and then the cooling water is sprayed on the outer surface of the tank through evenly distributed nozzles to cool the outside of the tank. This method monitors the pressure change in the internal space of the tank through the pressure sensor and the electric push rod, and responds quickly to physically cool the outside of the tank, reduce the speed of the increase in the internal temperature of the tank, and then reduce the speed of the internal pressure of the tank caused by LNG evaporation. The purpose of preventing the tank from exploding due to excessive internal pressure is achieved, and the safety of using low-temperature LNG storage tanks is improved.

[0010] Preferably, a spring is fixedly connected to one end of the sealing plate, a sealing block is fixedly connected to one end of the spring, and the sealing block is tightly connected to the inner wall of the water pipe.

[0011] During use, the sealing plate needs to contact the inner wall of the water pipe. After long-term use, the side of the sealing plate may be worn, reducing the sealing performance of the sealing plate, which is not conducive to the normal use of the cooling mechanism and also causes a waste of water resources. The present invention provides a spring and a sealing block. During the downward movement of the sealing plate, the inner wall of the water pipe squeezes the sealing block inward to compress the spring. At this time, the lower end of the water pipe is close to the opening, which can smoothly allow the cooling water in the upper space of the partition to enter the space of the lower layer of the partition. The elasticity of the spring is used to tightly connect the sealing block to the inner wall of the water pipe, thereby ensuring the sealing performance of the sealing plate and reducing the possibility of mechanism failure due to wear of the sealing block.

[0012] Preferably, a sealing gasket is fixedly connected to the outer surface of the sealing block, and the sealing gasket is a component made of rubber material.

[0013] The sealing block blocks the lower end opening of the water pipe during operation. However, in actual operation, there is sliding friction between the sealing block and the inner wall of the water pipe, which easily causes surface wear of the sealing block and reduces the service life of the sealing block component. The present invention provides a sealing gasket to protect the surface of the sealing block, thereby alleviating the wear rate of the sealing block, increasing the service life of the sealing block and reducing the cost of use.

[0014] Preferably, a water trough is fixedly connected to the outer surface of the tank body near the shell, one end of the water trough is fixedly connected to a water collecting box, and the lower end of the water collecting box is fixedly connected to a plug through a thread.

[0015] During use, the cooling mechanism uses cooling water to cool the outer surface of the tank body. The sprayed cooling water will scatter on the ground along the outer surface of the tank body, thereby causing water accumulation, affecting the surrounding environment, and causing a waste of water resources. The present invention arranges components such as a water trough; the cooling water flowing down from the upper end of the tank body flows into the water trough along the outer surface of the tank body, and then flows into the water collecting tank along the water trough. Thereafter, the stopcock can be unscrewed to transfer the collected wastewater for secondary utilization.

[0016] Preferably, a filter screen is fixedly connected to the upper end of the water collecting tank, a filter plate is fixedly connected to the upper end of the filter screen, and the filter plate is a component made of sponge material.

[0017] Since the tank body is arranged outdoors, dust in the environment will adhere to the outer surface of the tank body, and be brought into the water collecting tank by the cooling water as it is flushed, and then deposited in the water collecting tank, making it difficult to clean. The present invention provides a filter plate of a filter machine, and during the process of sending water from the water tank to the water collecting tank, the collected water is filtered to remove large particles of stains and prevent them from being deposited in the water collecting tank.

[0018] Preferably, the upper end of the tank body is fixedly connected to an exhaust mechanism near the outer shell, and the exhaust mechanism includes an exhaust pipe, a first electromagnet, a groove, a limiting rope, a second electromagnet, a rubber pad and a rubber ring. The upper end of the tank body is fixedly connected to an exhaust pipe near the outer shell, the upper end of the exhaust pipe is fixedly connected to the first electromagnet, a groove is provided on the upper surface of the first electromagnet near the center, a limiting rope evenly distributed is connected in a ring shape on the lower surface of the first electromagnet near the groove, the upper end of the limiting rope is fixedly connected to the second electromagnet, the lower surface of the second electromagnet is fixedly connected to a rubber pad, and the edge of the lower surface of the groove is fixedly connected to a rubber ring.

[0019] Considering that the cooling mechanism can alleviate the speed of increasing temperature inside the tank body by cooling the temperature during operation, so as to prevent the internal pressure of the tank body from surging, thereby avoiding explosion of the tank body due to gas expansion, and in actual use, it is necessary to discharge the excess gas inside the tank body in time to avoid deformation of the tank body and damage to the tank body structure, thereby ensuring the safety of the tank body; the present invention sets an exhaust mechanism, and the pressure sensor sends an electrical signal to the first electromagnet through the processor to cut off the power to the first electromagnet and the second electromagnet. The gas pressure inside the tank body will impact the second electromagnet, causing the second electromagnet to separate from the first electromagnet and detach from the groove, and open the opening at the upper end of the exhaust pipe to discharge the gas in the tank, and the limiting rope stabilizes the second electromagnet above the groove to avoid the second electromagnet popping out too far, which makes it difficult for the second electromagnet to return to its original position.

[0020] Preferably, the upper surface of the first electromagnet is fixedly connected with uniformly distributed limiting plates in a ring shape near the center.

[0021] In order to facilitate the second electromagnet to quickly return to its position and accurately fall into the groove, the present invention sets a limit plate to limit the horizontal movement of the second electromagnet to avoid the second electromagnet from deviating. After the first electromagnet and the second electromagnet are energized, they can be quickly attracted to close the exhaust pipe.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides a cooling mechanism, utilizes a pressure sensor and an electric push rod, monitors the pressure change of the internal space of the tank body, and responds quickly to physically cool the outside of the tank body, thereby reducing the rate of increase of the internal temperature of the tank body, and further reducing the rate at which the internal pressure of the tank body surges due to LNG evaporation, thereby preventing the tank body from exploding due to excessive internal pressure and improving the safety of the use of low-temperature LNG storage tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a cross-sectional view of the cooling mechanism of the present invention;

[0026] Figure 3 For the present invention Figure 2 A magnified view of point A;

[0027] Figure 4 It is a cross-sectional view of the water collecting tank of the present invention;

[0028] Figure 5 It is a cross-sectional view of the exhaust mechanism of the present invention;

[0029] Figure 6 For the present invention Figure 5 BB direction cross-sectional view.

[0030] In the figure: 1. mounting frame; 11. tank body; 12. air inlet pipe; 13. air supply pipe; 14. pressure reducing valve; 15. boosting valve; 16. pressure gauge; 2. cooling mechanism; 21. shell; 22. partition; 23. nozzle; 24. water supply pipeline; 25. electric push rod; 26. sealing plate; 27. pressure sensor; 28. spring; 29. ​​sealing block; 20. sealing gasket; 211. water tank; 212. water collecting box; 213. stopcock; 214. filter; 215. filter plate; 3. exhaust mechanism; 31. exhaust pipe; 32. first electromagnet; 33. groove; 34. limit rope; 35. second electromagnet; 36. rubber pad; 37. rubber ring; 38. limit plate. DETAILED DESCRIPTION

[0031] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] See also Figures 1 to 6 , the present invention provides a technical solution:

[0035] A cryogenic LNG storage tank, such as Figure 1 As shown, it includes a mounting frame 1, the upper end of the mounting frame 1 is fixedly connected to a tank body 11, one end of the front end outer surface of the tank body 11 is penetrated by an air intake pipe 12, the lower end of the front end outer surface of the tank body 11 is penetrated by an air supply pipe 13, a pressure reducing valve 14 is fixedly connected to the front end outer surface of the tank body 11 near the center position, a boosting valve 15 is fixedly connected to the front end outer surface of the tank body 11 near the air supply pipe 13, a pressure gauge 16 is fixedly connected to the front end outer surface of the tank body 11 near the pressure reducing valve 14, and a cooling mechanism 2 is fixedly connected to the upper end of the tank body 11.

[0036] Since LNG storage tanks are very large and are usually installed outdoors, the natural gas in the LNG storage tanks usually evaporates to a certain extent. The interlayer of the LNG storage tank is filled with pearlescent sand, which has a certain promoting effect on the vacuum degree of the tank body 11. After long-term use, the pearlescent sand may settle in the interlayer, resulting in a decrease in the vacuum degree at the top of the tank body 11, and the problem of water vapor accumulation at the top of the tank body 11, which increases the temperature inside the tank body 11. When the temperature outside the storage tank increases, the evaporation of LNG in the tank will greatly increase, and then the internal pressure of the storage tank will increase, so that the risk factor increases sharply, and it is easy to explode, etc., which poses a safety hazard. Therefore, it is necessary to cool down the tank body 11 with increased evaporation to reduce safety hazards. The present invention sets a cooling mechanism 2, first fills the tank body 11 with LNG through the air inlet pipe 12, and then adjusts the pressure in the pipe through the boost valve 15 and the pressure reducing valve 14. When the LNG in the tank evaporates due to the increase in the temperature of the tank body 11, the pressure in the tank increases. At this time, the pressure sensor 27 detects that the air pressure in the tank reaches a predetermined warning value, and cools the outside of the tank body 11 through the cooling mechanism 2 to reduce the temperature of the tank body 11 and the evaporation rate of the LNG inside the tank body 11, thereby effectively avoiding the phenomenon of the tank body 11 bursting due to the surge in internal pressure of the tank body 11.

[0037] As an embodiment of the present invention, Figure 1 , Figure 2 As shown, the cooling mechanism 2 includes a shell 21, a partition 22, a nozzle 23, a water pipeline 24, an electric push rod 25, a sealing plate 26 and a pressure sensor 27. The upper end of the tank body 11 is fixedly connected to the shell 21, and the inner side surface of the shell 21 is fixedly connected to the partition 22 near the middle position. The space formed by the upper surface of the partition 22 and the shell 21 is filled with cooling water. The lower surface of the shell 21 is fixedly connected with uniformly distributed nozzles 23 near the edge position, and the upper ends of the partition 22 are fixedly connected with two water pipelines 24 near the edge position. The lower ends of the two water pipelines 24 are slidably connected with a sealing plate 26 near the opening position. The lower end of the sealing plate 26 is fixedly connected to the electric push rod 25, and the lower end of the electric push rod 25 penetrates the shell 21 and is fixedly connected to the tank body 11. The upper end of the tank body 11 is fixedly connected with a pressure sensor 27 near the shell 21. The pressure sensor 27 is fixedly connected to the electric push rod 25 through an electrical signal.

[0038] In order to achieve the effect of reducing the temperature of the outer surface of the tank body 11, the present invention is provided with components such as a pressure sensor 27. When the LNG in the tank evaporates due to the increase in the temperature of the tank body 11, the pressure in the tank increases. At this time, the pressure sensor 27 detects that the air pressure in the tank reaches a predetermined warning value, and the processor analyzes and transmits an electrical signal to the electric push rod 25, so that the electric push rod 25 is started, and the electric push rod 25 pulls down the sealing plate 26. During the downward movement of the sealing plate 26, the lower end opening of the water delivery pipe 24 can smoothly allow the cooling water in the upper space of the partition 22 to enter the lower space of the partition 22. In the space, cooling water is sprayed on the outer surface of the tank body 11 through the evenly distributed nozzles 23 to cool the outside of the tank body 11. This method uses the pressure sensor 27 and the electric push rod 25 to monitor the pressure changes in the internal space of the tank body 11, and respond quickly to physically cool the outside of the tank body 11, thereby reducing the rate of increase in the internal temperature of the tank body 11, and then reducing the rate at which the internal pressure of the tank body 11 surges due to LNG evaporation, thereby preventing the tank body 11 from exploding due to excessive internal pressure and improving the safety of the use of low-temperature LNG storage tanks.

[0039] As an embodiment of the present invention, Figure 2 , Figure 3 As shown, a spring 28 is fixedly connected to one end of the sealing plate 26 , and a sealing block 29 is fixedly connected to one end of the spring 28 . The sealing block 29 is tightly connected to the inner wall of the water delivery pipe 24 .

[0040] During use, the sealing plate 26 needs to contact the inner wall of the water pipe 24. After long-term use, the side of the sealing plate 26 may be worn, reducing the sealing performance of the sealing plate 26, which is not conducive to the normal use of the cooling mechanism 2 and will also cause a waste of water resources. The present invention provides a spring 28 and a sealing block 29. During the downward movement of the sealing plate 26, the inner wall of the water pipe 24 squeezes the sealing block 29 inward, causing the spring 28 to be compressed. At this time, the lower end opening inside the water pipe 24 can smoothly allow the cooling water in the upper space of the partition 22 to enter the lower space of the partition 22. The elasticity of the spring 28 is used to tightly connect the sealing block 29 to the inner wall of the water pipe 24, thereby ensuring the sealing performance of the sealing plate 26 and reducing the possibility of failure of the mechanism due to wear of the sealing block 29.

[0041] As an embodiment of the present invention, Figure 3 As shown, a sealing pad 20 is fixedly connected to the outer surface of the sealing block 29, and the sealing pad 20 is a component made of rubber material.

[0042] The sealing block 29 blocks the lower end opening of the water pipe 24 during operation. However, in actual operation, there is sliding friction between the sealing block 29 and the inner wall of the water pipe 24, which easily causes surface wear of the sealing block 29 and reduces the service life of the sealing block 29. The present invention provides a sealing gasket 20, which is used to protect the surface of the sealing block 29, thereby alleviating the wear rate of the sealing block 29, increasing the service life of the sealing block 29 and reducing the cost of use.

[0043] As an embodiment of the present invention, Figure 4 As shown, a water tank 211 is fixedly connected to the outer surface of the tank body 11 near the outer shell 21, one end of the water tank 211 is fixedly connected to a water collecting box 212, and the lower end of the water collecting box 212 is fixedly connected to a plug 213 through threads.

[0044] During use, the cooling mechanism 2 uses cooling water to cool the outer surface of the tank body 11. The sprayed cooling water will scatter on the ground along the outer surface of the tank body 11, thereby causing water accumulation, affecting the surrounding environment, and causing a waste of water resources. The present invention provides components such as a water trough 211. The cooling water flowing down from the upper end of the tank body 11 flows into the water trough 211 along the outer surface of the tank body 11, and then flows into the water collecting tank 212 along the water trough 211. Thereafter, the plug 213 can be unscrewed to transfer the collected waste water for secondary utilization.

[0045] As an embodiment of the present invention, Figure 4 As shown, a filter screen 214 is fixedly connected to the upper end of the water collecting box 212, and a filter plate 215 is fixedly connected to the upper end of the filter screen 214. The filter plate 215 is a component made of sponge material.

[0046] Since the tank body 11 is arranged outdoors, dust in the environment will adhere to the outer surface of the tank body 11, and be brought into the water collecting tank 212 by the cooling water as it is flushed, and then deposited in the water collecting tank 212, making it difficult to clean. The present invention provides a filter screen 214 and a filter plate 215, and during the process of water supply from the water tank 211 to the water collecting tank 212, the collected water is filtered to remove large particles of stains and prevent them from being deposited in the water collecting tank 212.

[0047] As an embodiment of the present invention, Figure 1 , Figure 5 , Figure 6As shown, the upper end of the tank body 11 near the outer shell 21 is fixedly connected with an exhaust mechanism 3, and the exhaust mechanism 3 includes an exhaust pipe 31, a first electromagnet 32, a groove 33, a limiting rope 34, a second electromagnet 35, a rubber pad 36 and a rubber ring 37. The upper end of the tank body 11 near the outer shell 21 is fixedly connected with the exhaust pipe 31, and the upper end of the exhaust pipe 31 is fixedly connected with the first electromagnet 32. The upper surface of the first electromagnet 32 ​​is provided with a groove 33 near the center position, and the lower surface of the first electromagnet 32 ​​is connected with a uniformly distributed limiting rope 34 in a ring shape near the groove 33. The upper end of the limiting rope 34 is fixedly connected with the second electromagnet 35, and the lower surface of the second electromagnet 35 is fixedly connected with a rubber pad 36, and the edge of the lower surface of the groove 33 is fixedly connected with a rubber ring 37.

[0048] Considering that the cooling mechanism 2 can reduce the speed of the temperature increase inside the tank body 11 by cooling during operation, so as to prevent the internal pressure of the tank body 11 from surging, thereby avoiding the explosion of the tank body 11 due to gas expansion. In actual use, it is necessary to discharge the excess gas inside the tank body 11 in time to avoid deformation of the tank body 11 and damage to the structure of the tank body 11, thereby ensuring the safety of the tank body 11. The present invention sets an exhaust mechanism 3, and the pressure sensor 27 sends an electrical signal to the first electromagnet 32 ​​through the processor to cut off the power to the first electromagnet 32 ​​and the second electromagnet 35. The internal air pressure of the tank body 11 will impact the second electromagnet 35, prompting the second electromagnet 35 to separate from the first electromagnet 32, so that the second electromagnet 35 is out of the groove 33, and the opening at the upper end of the exhaust pipe 31 is opened to discharge the gas in the tank. The limiting rope 34 stabilizes the second electromagnet 35 above the groove 33 to avoid the second electromagnet 35 from being ejected too far, which makes it difficult for the second electromagnet 35 to return to its original position.

[0049] As an embodiment of the present invention, Figure 5 , Figure 6 As shown, the upper surface of the first electromagnet 32 ​​is fixedly connected with uniformly distributed limiting plates 38 in a ring shape near the center.

[0050] In order to facilitate the second electromagnet 35 to quickly return to its position and accurately fall into the groove 33, the present invention sets a limit plate 38 to limit the horizontal movement of the second electromagnet 35 to prevent the second electromagnet 35 from being offset. After the first electromagnet 32 ​​and the second electromagnet 35 are energized, they can be quickly attracted to close the exhaust pipe 31.

[0051] Instructions for use: During use of the present invention, first, LNG is filled into the tank body 11 through the air inlet pipe 12, and then the pressure in the pipe is adjusted through the boost valve 15 and the pressure reducing valve 14. When the LNG in the tank evaporates due to the increase in the temperature of the tank body 11, the pressure in the tank increases. At this time, the pressure sensor 27 detects that the air pressure in the tank has reached a predetermined warning value, and the processor analyzes and transmits an electrical signal to the electric push rod 25, so that the electric push rod 25 is started, and the electric push rod 25 pulls down the sealing plate 26. During the downward movement of the sealing plate 26, the inner wall of the water delivery pipe 24 squeezes the sealing block 29 inward, so that the spring 28 is compressed. At this time, the lower end opening inside the water delivery pipe 24 can smoothly allow the cooling water in the upper space of the partition 22 to enter the lower space of the partition 22, and then the cooling water is sprayed on the outer surface of the tank body 11 through the evenly distributed nozzles 23. , the outside of the tank body 11 is cooled, and the cooling water flowing down from the upper end of the tank body 11 flows into the water tank 211 along the outer surface of the tank body 11, and then flows into the water collecting tank 212 along the water tank 211. The filter plate 215 at the upper end of the filter screen 214 filters the cooling water to prevent a large amount of stains from entering the water collecting tank 212; at the same time, the pressure sensor 27 sends an electrical signal to the first electromagnet 32 ​​through the processor, so that the first electromagnet 32 ​​and the second electromagnet 35 are powered off, and the internal air pressure of the tank body 11 will impact the second electromagnet 35, prompting the second electromagnet 35 to separate from the first electromagnet 32, so that the second electromagnet 35 is out of the groove 33, and the opening at the upper end of the exhaust pipe 31 is opened to discharge the gas in the tank, and the limiting rope 34 stabilizes the second electromagnet 35 above the groove 33, and the limiting plate 38 further limits the position of the second electromagnet 35.

[0052] The electrical components appearing in this article are all connected to the external main controller and 220V AC power through a transformer, and the main controller can be a conventional known device that controls a computer, etc. The product model provided by the present invention is only used for the technical solution according to the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more matching and consistent with the technical solution of the present invention. It is a technical solution for the best application of the technical solution. The model of its product can be replaced and modified according to the required technical parameters, which is well known to technical personnel in this field. Therefore, technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cryogenic LNG storage tank, comprising a mounting frame (1), characterized in that: The upper end of the mounting frame (1) is fixedly connected to a tank body (11); an air intake pipe (12) is connected through one end of the front end outer surface of the tank body (11); an air supply pipe (13) is connected through the lower end of the front end outer surface of the tank body (11); a pressure reducing valve (14) is fixedly connected to the front end outer surface of the tank body (11) near the center; a boosting valve (15) is fixedly connected to the front end outer surface of the tank body (11) near the air supply pipe (13); a pressure gauge (16) is fixedly connected to the front end outer surface of the tank body (11) near the pressure reducing valve (14); and a cooling mechanism (2) is fixedly connected to the upper end of the tank body (11); The cooling mechanism (2) comprises a shell (21), a partition (22), a nozzle (23), a water delivery pipeline (24), an electric push rod (25), a sealing plate (26) and a pressure sensor (27); the upper end of the tank body (11) is fixedly connected to the shell (21); the inner side surface of the shell (21) is fixedly connected to the partition (22) near the middle position; the space formed by the upper surface of the partition (22) and the shell (21) is filled with cooling water; the lower surface of the shell (21) is fixedly connected to the nozzles (23) distributed evenly near the edge; the partition (25) is fixedly connected to the outer side surface of the shell (21) and the inner side surface of the shell (21) is fixedly connected to the outer side surface of the shell (21); Two water pipes (24) are fixedly connected to the upper surface of the plate (22) at both ends thereof near the edge, and the lower ends of the two water pipes (24) are slidably connected to a sealing plate (26) near the opening, and the lower end of the sealing plate (26) is fixedly connected to an electric push rod (25), and the lower end of the electric push rod (25) passes through the outer shell (21) and is fixedly connected to the tank body (11), and the upper end of the tank body (11) near the outer shell (21) is fixedly connected to a pressure sensor (27), and the pressure sensor (27) is fixedly connected to the electric push rod (25) through an electrical signal; A spring (28) is fixedly connected to one end of the sealing plate (26), a sealing block (29) is fixedly connected to one end of the spring (28), and the sealing block (29) is tightly connected to the inner wall of the water delivery pipe (24); The outer surface of the sealing block (29) is fixedly connected with a sealing pad (20), and the sealing pad (20) is a component made of rubber material; An exhaust mechanism (3) is fixedly connected to the upper end of the tank body (11) near the outer shell (21), and the exhaust mechanism (3) comprises an exhaust pipe (31), a first electromagnet (32), a groove (33), a limiting rope (34), a second electromagnet (35), a rubber pad (36) and a rubber ring (37). The upper end of the tank body (11) near the outer shell (21) is fixedly connected to the exhaust pipe (31), and the upper end of the exhaust pipe (31) is fixedly connected to the first electromagnet (32). A groove (33) is provided near the center of the upper surface of the first electromagnet (32). A limiting rope (34) evenly distributed is connected in an annular shape at the lower surface of the first electromagnet (32) near the groove (33). The upper end of the limiting rope (34) is fixedly connected to the second electromagnet (35), and the lower surface of the second electromagnet (35) is fixedly connected to the rubber pad (36). The edge of the lower surface of the groove (33) is fixedly connected to the rubber ring (37). The upper surface of the first electromagnet (32) is fixedly connected to uniformly distributed limiting plates (38) in a ring shape near the center; The spray head (23) is arranged above the tank body (11) and is used to spray liquid onto the upper surface of the tank body (11) to ensure that the liquid can evenly cover and flow to the lower surface; When the LNG in the tank evaporates due to the increase in the temperature of the tank body (11), the pressure in the tank increases. At this time, the pressure sensor (27) detects that the air pressure in the tank has reached a predetermined warning value, and the processor analyzes and transmits an electrical signal to the electric push rod (25), so that the electric push rod (25) is started, and the electric push rod (25) pulls down the sealing plate (26). During the downward movement of the sealing plate (26), the lower end opening inside the water delivery pipe (24) can smoothly allow the cooling water in the upper space of the partition (22) to enter the lower space of the partition (22), and then the cooling water is sprayed on the outer surface of the tank body (11) through the evenly distributed nozzles (23), so as to cool the outside of the tank body (11); During use, the sealing plate (26) needs to be in contact with the inner wall of the water pipe (24). After long-term use, the side of the sealing plate (26) may be worn, which reduces the sealing performance of the sealing plate (26), is not conducive to the normal use of the cooling mechanism (2), and also causes a waste of water resources. By providing the spring (28) and the sealing block (29), during the downward movement of the sealing plate (26), the inner wall of the water pipe (24) presses the sealing block (29) inward, causing the spring (28) to be compressed. At this time, the lower end opening inside the water pipe (24) can smoothly allow the cooling water in the upper space of the partition (22) to enter the lower space of the partition (22). The elasticity of the spring (28) is used to tightly connect the sealing block (29) to the inner wall of the water pipe (24), thereby ensuring the sealing performance of the sealing plate (26) and reducing the possibility of failure of the mechanism due to wear of the sealing block (29). The pressure sensor (27) sends an electrical signal to the first electromagnet (32) through the processor, so that the first electromagnet (32) and the second electromagnet (35) are powered off, and the internal air pressure of the tank body (11) impacts the second electromagnet (35), prompting the second electromagnet (35) to separate from the first electromagnet (32), so that the second electromagnet (35) is separated from the groove (33), and the opening at the upper end of the exhaust pipe (31) is opened to discharge the gas in the tank. The limiting rope (34) stabilizes the second electromagnet (35) above the groove (33), so as to prevent the second electromagnet (35) from being ejected too far, which makes it difficult for the second electromagnet (35) to return to its original position.

2. A cryogenic LNG storage tank according to claim 1, characterized in that: A water tank (211) is fixedly connected to the outer surface of the tank body (11) near the outer shell (21), one end of the water tank (211) is fixedly connected to a water collecting box (212), and the lower end of the water collecting box (212) is fixedly connected to a cock (213) via a thread.

3. A cryogenic LNG storage tank according to claim 2, characterized in that: A filter screen (214) is fixedly connected to the upper end of the water collecting box (212), and a filter plate (215) is fixedly connected to the upper end of the filter screen (214), wherein the filter plate (215) is a component made of sponge material.

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