An LNG storage and transportation tank equipped with a safety protection system

Abstract

The present invention discloses an LNG storage and transportation tank provided with a safety protection system, which includes a storage mechanism and a support mechanism. The storage mechanism is composed of a storage outer tank, a storage inner tank, a temperature sensor, a pressure gauge, an oil outlet pipe, a sealing valve, a sealing piston, a protection box, a fixed box, a driving worm, a driving lead screw, a driving worm gear, a micro motor, a backup battery and an alarm. By setting the storage inner tank and the storage outer tank, and connecting the cooling cavity formed by the storage inner tank and the storage outer tank to the water storage tank, when the temperature is high, it can cool itself through the circulating flow of water. By setting the reciprocating lead screw and the submersible pump, the reciprocating lead screw makes the cooling ring reciprocate outside the storage outer tank, and can spray water to cool the outside of the storage outer tank, so as to avoid accidents when the temperature is too high or leakage occurs, increase the safety of the storage and transportation tank, and by setting the auxiliary support plate, the stress area of the support legs is increased, the center of gravity of the storage and transportation tank is lowered, and its stability is increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of LNG storage and transportation tanks, and particularly relates to an LNG storage and transportation tank provided with a safety protection system. Background Art

[0002] The liquefied natural gas (LNG) storage and transportation tank is one of the main tools for transporting natural gas. The existing LNG storage and transportation tanks have rigid structures and single functions. When the temperature is relatively high, the existing storage and transportation tanks cannot cool themselves through the circulating flow of water. In case of accident leakage or fire, they cannot be forced to cool, control combustion, prevent the tank body from heating up too fast and causing overpressure rupture of the inner and outer tanks, increase the stress area of the support legs, reduce the center of gravity of the storage and transportation tank, and increase its stability. Summary of the Invention

[0003] The purpose of the present invention is to provide an LNG storage and transportation tank provided with a safety protection system to solve the above problems, and to solve the disadvantages of the existing cutting machine such as complex structure, difficult operation, and slow start-up.

[0004] To solve the above problems, the present invention provides a technical solution for an LNG storage and transportation tank provided with a safety protection system: An LNG storage and transportation tank provided with a safety protection system includes a storage mechanism and a support mechanism. The storage mechanism is composed of a storage outer tank, a storage inner tank, a temperature sensor, a pressure gauge, an oil outlet pipe, a sealing valve, a sealing piston, a protection box, a fixed box, a driving worm, a driving lead screw, a driving worm gear, a micro motor, a backup battery, and an alarm. The storage inner tank is fixedly installed inside the storage outer tank. A cooling cavity is formed between the storage inner tank and the storage outer tank. One end of the storage inner tank is welded with an oil outlet pipe. The end of the oil outlet pipe far away from the storage inner tank penetrates through the storage outer tank and is fixedly installed with a sealing valve. A sealing piston with a rectangular structure is slidably connected inside the sealing valve. A protection box is fixedly installed at the bottom of the sealing valve. A fixed box is fixedly installed inside the protection box at the bottom of the sealing valve. A driving worm gear is rotatably connected inside the fixed box. A driving lead screw is fixedly installed at the bottom of the sealing piston. The driving lead screw passes through the bottom of the sealing valve and is threadedly connected with the driving worm gear. A driving worm is rotatably connected inside the fixed box. The driving worm is meshed with the driving worm gear. A micro motor is fixedly installed on one side of the fixed box. The output end of the micro motor is fixedly connected with the driving worm. A backup battery is fixedly installed inside the protection box. An alarm is fixedly installed on one side of the backup battery.

[0005] Preferably, the support mechanism is composed of a first support leg, a second support leg, a water storage tank, a reciprocating lead screw, a moving slider, a submersible pump, a cooling ring, atomizing nozzles, a backup power supply, a servo motor, a cooling water pump, a controller, a solenoid valve and an auxiliary support plate. A first support leg is welded to one end of the bottom of the storage outer tank close to the oil outlet pipe, and a second support leg is fixedly connected to the other end of the bottom of the storage outer tank away from the first support leg. A water storage tank is fixedly installed between the first support leg and the second support leg. A reciprocating lead screw is rotatably connected inside the water storage tank. A moving slider is threadedly connected to the outside of the reciprocating lead screw. The moving slider is slidably connected to the top of the water storage tank. A submersible pump is fixedly connected to the bottom of the moving slider. A cooling ring is fixedly connected to the top of the moving slider. The cooling ring is sleeved on the outside of the storage outer tank. A plurality of atomizing nozzles are equidistantly installed on the inner wall of the cooling ring. The atomizing nozzles are connected to the output end of the submersible pump through a water pipe.

[0006] Preferably, a servo motor is fixedly installed inside the second support leg. The output end of the servo motor is fixedly connected to the reciprocating lead screw. A backup power supply is fixedly installed inside the second support leg. A cooling water pump is fixedly installed on the side of the second support leg away from the servo motor. The input end of the cooling water pump is connected to the water storage tank through a water pipe. An electromagnetic valve is fixedly installed at one end of the storage inner tank close to the second support leg. The output end of the cooling water pump is connected to the electromagnetic valve through a water pipe. A controller is fixedly installed above the backup power supply inside the second support leg. The cooling water pump, the controller, the servo motor and the electromagnetic valve are all electrically connected to the backup power supply.

[0007] Preferably, a pressure gauge is fixedly installed at one end of the storage inner tank.

[0008] Preferably, a temperature sensor is fixedly installed at one end of the outside of the storage outer tank close to the pressure gauge.

[0009] Preferably, the alarm and the micro motor are both electrically connected to the backup battery.

[0010] Preferably, auxiliary support plates are slidably connected to both sides of the bottom of the first support leg and both sides of the bottom of the second support leg.

[0011] Preferably, the temperature sensor, the cooling water pump, the micro motor, the submersible pump, the servo motor and the solenoid valve are all electrically connected to the controller.

[0012] Preferably, the top of the cooling chamber is connected to the water storage tank through a circulating water pipe.

[0013] Advantages of the present invention: By providing a storage and transportation inner tank and a storage and transportation outer tank, and connecting the cooling cavity formed by the storage and transportation inner tank and the storage and transportation outer tank to a water storage tank, when the temperature is relatively high, the temperature can be reduced by the circulating flow of water. By providing a reciprocating lead screw and a submersible pump, the reciprocating lead screw enables the cooling ring to reciprocate outside the storage and transportation outer tank, and water can be sprayed outside the storage and transportation outer tank to cool it, thereby avoiding accidents when the temperature is too high or leakage occurs, increasing the safety of the storage and transportation tank. And by providing an auxiliary support plate, the stress area of the support legs is increased, the center of gravity of the storage and transportation tank is reduced, and its stability is increased. Brief Description of the Drawings

[0014] For ease of explanation, the present invention will be described in detail by the following specific embodiments and accompanying drawings.

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is a schematic internal structure diagram of the water storage tank of the present invention;

[0017] Figure 3 is an enlarged structural diagram at B of the present invention;

[0018] Figure 4 is of the present invention Figure 2 sectional view along the A-A direction.

[0019] In the figure: 1, storage mechanism; 2, support mechanism; 3, storage and transportation outer tank; 4, storage and transportation inner tank; 5, temperature sensor; 6, pressure gauge; 7, oil outlet pipe; 8, sealing valve; 9, sealing piston; 10, protection box; 11, fixed box; 12, driving worm; 13, driving lead screw; 14, driving worm gear; 15, micro motor; 16, backup battery; 17, alarm; 18, first support leg; 19, second support leg; 20, water storage tank; 21, reciprocating lead screw; 22, moving slider; 23, submersible pump; 24, cooling ring; 25, atomizing nozzle; 26, backup power supply; 27, servo motor; 28, cooling water pump; 29, controller; 30, solenoid valve; 31, auxiliary support plate; 32, cooling cavity; 33, circulating water pipe. Detailed Embodiments

[0020] As Figures 1-4As shown in the figure, the present specific implementation adopts the following technical solution: An LNG storage and transportation tank equipped with a safety protection system, including a storage mechanism 1 and a support mechanism 2. The storage mechanism 1 is composed of a storage outer tank 3, a storage inner tank 4, a temperature sensor 5, a pressure gauge 6, an oil outlet pipe 7, a sealing valve 8, a sealing piston 9, a protection box 10, a fixed box 11, a transmission worm 12, a transmission lead screw 13, a transmission worm gear 14, a micro motor 15, a backup battery 16 and an alarm 17. The model of the temperature sensor 5 is PT100, the model of the micro motor 15 is JGB37-520, and the model of the alarm 17 is SFB-55. The storage inner tank 4 is fixedly installed inside the storage outer tank 3. A cooling cavity 32 is formed between the storage inner tank 4 and the storage outer tank 3. One end of the storage inner tank 4 is welded with an oil outlet pipe 7. The end of the oil outlet pipe 7 far away from the storage inner tank 4 penetrates through the storage outer tank 3 and is fixedly installed with a sealing valve 8. A rectangular sealing piston 9 is slidably connected inside the sealing valve 8. A protection box 10 is fixedly installed at the bottom of the sealing valve 8. A fixed box 11 is fixedly installed inside the protection box 10 at the bottom of the sealing valve 8. A transmission worm gear 14 is rotatably connected inside the fixed box 11. A transmission lead screw 13 is fixedly installed at the bottom of the sealing piston 9. The transmission lead screw 13 penetrates through the bottom of the sealing valve 8 and is threadedly connected with the transmission worm gear 14. A transmission worm 12 is rotatably connected inside the fixed box 11. The transmission worm 12 is meshed with the transmission worm gear 14. A micro motor 15 is fixedly installed on one side of the fixed box 11. The output end of the micro motor 15 is fixedly connected with the transmission worm 12. A backup battery 16 is fixedly installed inside the protection box 10. An alarm 17 is fixedly installed on one side of the backup battery 16.

[0021] Among them, the support mechanism 2 is composed of a first support leg 18, a second support leg 19, a water storage tank 20, a reciprocating lead screw 21, a moving slider 22, a submersible pump 23, a cooling ring 24, an atomizing nozzle 25, a backup power supply 26, a servo motor 27, a cooling water pump 28, a controller 29, a solenoid valve 30 and an auxiliary support plate 31. The model of the controller 29 is TB6600. One end of the bottom of the storage and transportation outer tank 3 close to the oil outlet pipe 7 is welded with a first support leg 18, and one end of the bottom of the storage and transportation outer tank 3 far from the first support leg 18 is fixedly connected with a second support leg 19. A water storage tank 20 is fixedly installed between the first support leg 18 and the second support leg 19. A reciprocating lead screw 21 is rotatably connected inside the water storage tank 20. A moving slider 22 is threadedly connected to the outside of the reciprocating lead screw 21. The moving slider 22 is slidably connected to the top of the water storage tank 20. A submersible pump 23 is fixedly connected to the bottom of the moving slider 22. A cooling ring 24 is fixedly connected to the top of the moving slider 22. The cooling ring 24 is sleeved on the outside of the storage and transportation outer tank 3. A plurality of atomizing nozzles 25 are equidistantly installed on the inner wall of the cooling ring 24. The atomizing nozzles 25 are connected to the output end of the submersible pump 23 through a water pipe.

[0022] Among them, a servo motor 27 is fixedly installed inside the second support leg 19. The output end of the servo motor 27 is fixedly connected with the reciprocating lead screw 21. A backup power supply 26 is fixedly installed inside the second support leg 19. A cooling water pump 28 is fixedly installed on the side of the second support leg 19 far from the servo motor 27. The input end of the cooling water pump 28 is connected to the water storage tank 20 through a water pipe. An electromagnetic valve 30 is fixedly installed at one end of the storage and transportation inner tank 4 close to the second support leg 19. The output end of the cooling water pump 28 is connected to the electromagnetic valve 30 through a water pipe. A controller 29 is fixedly installed inside the second support leg 19 above the backup power supply 26. The cooling water pump 28, the controller 29, the servo motor 27 and the electromagnetic valve 30 are all electrically connected to the backup power supply 26.

[0023] Among them, a pressure gauge 6 is fixedly installed at one end of the storage and transportation inner tank 4, which is convenient for observing the pressure of the storage and transportation inner tank 4.

[0024] Among them, a temperature sensor 5 is fixedly installed at one end of the outside of the storage and transportation outer tank 3 close to the pressure gauge 6, which is convenient for real-time monitoring of the external temperature.

[0025] Among them, the alarm 17 and the micro motor 15 are both electrically connected to the backup battery 16, which is convenient for independent power supply.

[0026] Among them, auxiliary support plates 31 are slidably connected to both sides of the bottom of the first support leg 18 and both sides of the bottom of the second support leg 19, which increases the stability of the storage and transportation tank.

[0027] Among them, the temperature sensor 5, the cooling water pump 28, the micro motor 15, the submersible pump 23, the servo motor 27 and the solenoid valve 30 are all electrically connected to the controller 29. The model of the servo motor 27 is ECMA-C30807GS, which is convenient for automatic temperature reduction.

[0028] Among them, the top of the cooling chamber 32 is connected to the water storage tank 20 through a circulating water pipe 33, which is convenient for the circulating cooling of water.

[0029] Specifically: a safety protection system-equipped LNG storage and transportation tank. When in use, first, the auxiliary support plates 31 are respectively drawn out from the first support leg 18 and the second support leg 19 to increase the stress area at the bottom, lower its center of gravity, and increase its stability. When a fire breaks out or the temperature is high outside, the temperature sensor 5 transmits a signal to the controller 29. The controller 29 controls the micro motor 15 to work. The micro motor 15 drives the transmission worm 12 to drive the transmission worm wheel 14 to rotate. Since the transmission worm wheel 14 is meshed and connected with the transmission worm 12, under the reaction force of the thread, the transmission screw rod 13 pushes the sealing piston 9 to slide towards one side inside the sealing valve 8, and the oil outlet pipe 7 is sealed by the sealing piston 9. At the same time, the controller 29 controls the servo motor 27, the submersible pump 23 and the cooling water pump 28 to work. The servo motor 27 drives the reciprocating screw rod 21 to rotate, and the reciprocating screw rod 21 drives the moving slider 22 to slide along the water storage tank 20. The moving slider 22 drives the cooling ring 24 to slide outside the storage and transportation outer tank 3. At the same time, the submersible pump 23 sprays the water inside the water storage tank 20 through the atomizing nozzle 25 to cool the outside of the storage and transportation outer tank 3. And the cooling water pump 28 pumps the water into the cooling chamber 32 and circulates it through the circulating water pipe 33 to cool the storage and transportation inner tank 4 to avoid self-cooling protection when the temperature is too high or there is a fire.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An LNG storage and transportation tank equipped with a safety protection system, comprising a storage mechanism (1) and a support mechanism (2), characterized in that: The storage mechanism (1) consists of a storage outer tank (3), a storage inner tank (4), a temperature sensor (5), a pressure gauge (6), an oil outlet pipe (7), a sealing valve (8), a sealing piston (9), a protective box (10), a fixed box (11), a driving worm (12), a driving lead screw (13), a driving worm gear (14), a micro motor (15), a backup battery (16) and an alarm (17). The storage inner tank (4) is fixedly installed inside the storage outer tank (3). A cooling chamber (32) is formed between the storage inner tank (4) and the storage outer tank (3). One end of the storage inner tank (4) is welded with the oil outlet pipe (7). The end of the oil outlet pipe (7) far from the storage inner tank (4) penetrates through the storage outer tank (3) and is fixedly installed with a sealing valve (8). A rectangular sealing piston (9) is slidably connected inside the sealing valve (8). The bottom of the sealing valve (8) is fixedly installed with a protective box (10). A fixed box (11) is fixedly installed inside the protective box (10) at the bottom of the sealing valve (8). A driving worm gear (14) is rotatably connected inside the fixed box (11). The bottom of the sealing piston (9) is fixedly installed with a driving lead screw (13). The driving lead screw (13) passes through the bottom of the sealing valve (8) and is threadedly connected with the driving worm gear (14). A driving worm (12) is rotatably connected inside the fixed box (11). The driving worm (12) is meshed with the driving worm gear (14). A micro motor (15) is fixedly installed on one side of the fixed box (11). The output end of the micro motor (15) is fixedly connected with the driving worm (12). A backup battery (16) is fixedly installed inside the protective box (10). An alarm (17) is fixedly installed on one side of the backup battery (16).The support mechanism (2) consists of a first support leg (18), a second support leg (19), a water storage tank (20), a reciprocating lead screw (21), a moving slider (22), a submersible pump (23), a cooling ring (24), an atomizing nozzle (25), a backup power supply (26), a servo motor (27), a cooling water pump (28), a controller (29), a solenoid valve (30), and an auxiliary support plate (31). At one end of the bottom of the storage and transportation outer tank (3) near the oil outlet pipe (7), a first support leg (18) is welded. At one end of the bottom of the storage and transportation outer tank (3) far from the first support leg (18), a second support leg (19) is fixedly connected. A water storage tank (20) is fixedly installed between the first support leg (18) and the second support leg (19). A reciprocating lead screw (21) is rotatably connected inside the water storage tank (20). A moving slider (22) is threadedly connected to the outer side of the reciprocating lead screw (21). The moving slider (22) is slidably connected to the top of the water storage tank (20). A submersible pump (23) is fixedly connected to the bottom of the moving slider (22). A cooling ring (24) is fixedly connected to the top of the moving slider (22). The cooling ring (24) is sleeved on the outer side of the storage and transportation outer tank (3). A plurality of atomizing nozzles (25) are equidistantly installed on the inner wall of the cooling ring (24). The atomizing nozzles (25) are connected to the output end of the submersible pump (23) through a water pipe. A servo motor (27) is fixedly installed inside the second support leg (19). The output end of the servo motor (27) is fixedly connected to the reciprocating lead screw (21). A backup power supply (26) is fixedly installed inside the second support leg (19). A cooling water pump (28) is fixedly installed inside the second support leg (19) on the side far from the servo motor (27). The input end of the cooling water pump (28) is connected to the water storage tank (20) through a water pipe. A solenoid valve (30) is fixedly installed at one end of the storage and transportation inner tank (4) near the second support leg (19). The output end of the cooling water pump (28) is connected to the solenoid valve (30) through a water pipe. A controller (29) is fixedly installed inside the second support leg (19) above the backup power supply (26). The cooling water pump (28), the controller (29), the servo motor (27), and the solenoid valve (30) are all electrically connected to the backup power supply (26). A pressure gauge (6) is fixedly installed at one end of the storage and transportation inner tank (4). A temperature sensor (5) is fixedly installed on the outer side of the storage and transportation outer tank (3) near the pressure gauge (6). The alarm (17) and the micro motor (15) are both electrically connected to the backup battery (16). Auxiliary support plates (31) are slidably connected to both sides of the bottom of the first support leg (18) and both sides of the bottom of the second support leg (19).; 2. The LNG storage and transportation tank with a safety protection system according to claim 1, characterized in that: The temperature sensor (5), cooling water pump (28), micro motor (15), submersible pump (23), servo motor (27) and solenoid valve (30) are all electrically connected to the controller (29).

3. A safety protection system-equipped LNG storage and transportation tank according to claim 1, characterized in that: The top of the cooling chamber (32) is connected to the water storage tank (20) through a circulating water pipe (33).

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