Liquid hydrogen storage tank with vaporizer

Abstract

The utility model relates to a liquid hydrogen storage tank with a vaporizer. Comprising an inner shell used for containing liquid hydrogen; the pressurizing unit comprises a pressurizing pipeline, and a pressurizing valve, a pressurizer and a pressurizing and pressure regulating valve which are sequentially arranged on the pressurizing pipeline in the medium flowing direction; one end of the pressurizing pipeline is connected with the bottom end of the inner shell, and the other end is communicated with the gas-phase space of the inner shell; the pressurizing unit is used for maintaining the pressure of the inner shell at a first pressure; the air supply unit comprises an air supply pipeline, and an air supply valve, a vaporizer, a pressure reducing valve and a check valve which are sequentially arranged on the air supply pipeline in the medium flowing direction; one end of the gas supply pipeline is connected with the bottom end of the inner shell, and the other end is connected with external gas utilization equipment; the vaporizer is used for converting liquid hydrogen into hydrogen, and the pressure reducing valve is used for reducing the pressure of the gasified hydrogen to the pressure required by gas equipment; and the exhaust unit is communicated with the gas phase space of the inner shell and is used for exhausting the overpressure gas. According to the storage tank, gas supply parameters can be changed according to gas use requirements of users, and the applicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen storage, in particular to a liquid hydrogen storage tank with a vaporizer. Background Art

[0002] In recent years, hydrogen, as an important energy source, has been widely used in defense, aerospace, large-scale scientific and engineering research, low-temperature superconductors, electronic chips, energy chemicals, and metallurgy. However, due to storage issues, the cost of commercializing hydrogen energy remains high. Therefore, storing liquefied hydrogen in tanks and using these tanks to provide users with hydrogen gas or liquid hydrogen is the key to solving this problem.

[0003] In the related art, the storage tank can only provide users with hydrogen of a single parameter and cannot change the gas supply parameters according to the user's gas requirements. The applicability of the storage tank is poor.

[0004] Therefore, there is an urgent need to provide a liquid hydrogen storage tank with a vaporizer to solve the above technical problems. Utility Model Content

[0005] The embodiment of the utility model provides a liquid hydrogen storage tank with a vaporizer, which can change the gas supply parameters according to the gas requirements of the user and has strong applicability.

[0006] One embodiment of the present invention provides a liquid hydrogen storage tank with a vaporizer, comprising:

[0007] Inner shell, used to contain liquid hydrogen;

[0008] A boosting unit, comprising a boosting pipeline and a boosting valve, a supercharger, and a boosting pressure regulating valve sequentially arranged on the boosting pipeline along the medium flow direction; one end of the boosting pipeline is connected to the bottom end of the inner shell, and the other end is in communication with the gas phase space of the inner shell; the boosting valve is used to vaporize and pressure-boost the liquid hydrogen flowing out of the inner shell, and the boosting pressure regulating valve is used to control the pressure range to maintain the pressure of the inner shell at a first pressure;

[0009] The gas supply unit includes a gas supply pipeline and a gas supply valve, a vaporizer, a pressure reducing valve, and a check valve sequentially arranged on the gas supply pipeline along the flow direction of the medium; one end of the gas supply pipeline is connected to the bottom end of the inner shell, and the other end is connected to an external gas-consuming device; the vaporizer is used to vaporize liquid hydrogen into hydrogen gas, and the pressure reducing valve is used to reduce the pressure of the vaporized hydrogen gas to the pressure required by the gas-consuming device;

[0010] The exhaust unit is communicated with the gas phase space of the inner shell and is used for exhausting the overpressure gas.

[0011] An embodiment of the present utility model provides a liquid hydrogen storage tank with a vaporizer. By setting a supercharger, the liquid hydrogen can be heated and vaporized, thereby increasing the pressure of the inner shell. The boost and pressure regulating valve can control the pressure of the hydrogen vaporized and pressurized to maintain the stability of the pressure in the inner shell, which is conducive to the discharge of liquid hydrogen. When the user needs hydrogen, first open the gas supply valve, and the liquid hydrogen will flow along the gas supply pipeline to the vaporizer, where it is heated by the external air and vaporized into hydrogen. The volume expands and the pressure increases. After passing through the pressure reducing valve, the pressure is reduced to the pressure required by the gas-using equipment. When the gas pressure required by the user changes, it is only necessary to adjust the parameters of the pressure reducing valve to change the gas supply parameters, thereby meeting customer needs. It can be seen that the present application can change the gas supply parameters according to the gas requirements of the user, and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 A schematic diagram of a system of a liquid hydrogen storage tank with a vaporizer provided in one embodiment of the present invention;

[0014] Figure 2 A schematic structural diagram of a cold storage screen provided in one embodiment of the present invention;

[0015] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0016] Reference numerals:

[0017] 10-inner shell;

[0018] 20-housing;

[0019] 30-cold storage screen; 301-cylinder; 302-upper screen; 303-lower screen;

[0020] 40-support assembly; 401-bolt; 402-washer; 403-lock nut; 404-cylinder;

[0021] 50-air supply unit; 501-air supply pipeline; 502-carburetor; 503-pressure reducing valve; 504-first pressure gauge; 505-check valve; 506-air supply valve;

[0022] 60-liquid filling and discharge pipeline; 601-emergency shut-off valve; 602-liquid filling and discharge switch valve;

[0023] 70-vacuum interlayer;

[0024] 80-boosting unit; 801-boosting pipeline; 802-boosting valve; 803-supercharger; 804-boosting pressure regulating valve;

[0025] 90-overflow pipe; 901-overflow valve; 902-overflow monitoring meter;

[0026] 100-exhaust unit; 101-exhaust pipeline; 102-exhaust valve; 103-pressure-reducing and regulating valve;

[0027] 110-safety pipeline; 111-safety valve;

[0028] 120-vent line;

[0029] 130-Liquid level pipeline; 131-Liquid level gauge; 132-Second pressure gauge. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in 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.

[0031] like Figure 1 As shown, the embodiment of the present invention provides a liquid hydrogen storage tank with a vaporizer, comprising:

[0032] The inner shell 10 is used to contain liquid hydrogen;

[0033] The boosting unit 80 includes a boosting pipeline 801 and a boosting valve 802, a booster 803, and a boosting pressure regulating valve 804, which are sequentially arranged on the boosting pipeline 801 along the direction of medium flow. One end of the boosting pipeline 801 is connected to the bottom end of the inner shell 10, and the other end is connected to the gas phase space of the inner shell 10. The boosting valve 802 is used to vaporize and increase the pressure of the liquid hydrogen flowing out of the inner shell 10, and the boosting pressure regulating valve 804 is used to control the pressure range to maintain the pressure of the inner shell 10 at the first pressure.

[0034] The gas supply unit 50 includes a gas supply pipeline 501 and a gas supply valve 506, a vaporizer 502, a pressure reducing valve 503, and a check valve 505, which are sequentially arranged on the gas supply pipeline 501 along the direction of medium flow. One end of the gas supply pipeline 501 is connected to the bottom end of the inner shell 10, and the other end is connected to an external gas-consuming device. The vaporizer 502 is used to vaporize liquid hydrogen into hydrogen gas, and the pressure reducing valve 503 is used to reduce the pressure of the vaporized hydrogen gas to the pressure required by the gas-consuming device.

[0035] The exhaust unit 100 is communicated with the gas phase space of the inner shell 10 and is used to discharge overpressure gas.

[0036] In this embodiment, by providing a supercharger 803, the liquid hydrogen can be heated and vaporized, thereby increasing the pressure of the inner shell 10, and the boost pressure regulating valve 804 can control the pressure to which the hydrogen is vaporized and pressurized to maintain the stability of the pressure in the inner shell 10, thereby facilitating the discharge of liquid hydrogen. When the user needs hydrogen, first open the gas supply valve 506, and the liquid hydrogen will flow along the gas supply pipeline 501 to the vaporizer 502, where it is heated by the outside air and vaporized into hydrogen. The volume expansion pressure increases, and after passing through the pressure reducing valve 503, the pressure is reduced to the pressure required by the gas-using equipment. When the gas pressure required by the user changes, it is only necessary to adjust the parameters of the pressure reducing valve 503 to change the gas supply parameters, thereby meeting customer needs. It can be seen that the present application can change the gas supply parameters according to the gas requirements of the user, and has strong applicability.

[0037] In addition, the first pressure is determined according to user needs and equipment performance, such as 0.8 MPa.

[0038] In some embodiments, the outer portion of the inner shell 10 is sequentially covered with a cold storage shield 30 and an outer shell 20 , and a vacuum is formed between the inner shell 10 and the outer shell 20 ;

[0039] The air supply line 501 between the air supply valve 506 and the vaporizer 502 is spirally wound around the outer wall of the cold storage panel 30 .

[0040] In this embodiment, the storage tank is configured as a three-layer structure, with an inner shell 10, a cold storage screen 30, and an outer shell 20 from the inside out. The top of the inner shell 10 is hoisted on the top of the outer shell 20 via a neck tube, and the cold storage screen 30 is also hoisted on the outer shell 20. Since the lower the temperature of the cold storage screen 30, the better the radiation isolation effect. Therefore, the present application wraps the gas supply pipeline 501 around the cold storage screen 30. When hydrogen is supplied to the gas-consuming equipment, the liquid hydrogen flowing out of the inner shell 10 can provide cooling to it through the pipeline wrapped around the cold storage screen 30, thereby reducing the temperature of the cold storage screen 30. The low-temperature cold storage screen 30 is used to isolate the inner shell 10 from external heat radiation, reducing the vaporization of liquid hydrogen. In this way, not only can the cooling capacity of liquid hydrogen be fully utilized to improve energy utilization, but the low-temperature cold storage screen 30 can also be used to reduce the heat leakage rate of the inner shell 10 and the evaporation rate of liquid hydrogen. In the present application, the lowest temperature of the cold storage panel 30 can be close to -253°C, and the highest temperature after rewarming is no higher than -20°C.

[0041] In some embodiments, the storage tank further includes a liquid supply and discharge pipeline 60 and a vacuum interlayer 70; one end of the liquid supply and discharge pipeline 60 passes through the outer shell 20 and the cold storage panel 30 and is connected to the bottom end of the inner shell 10, and the other end is a liquid supply and discharge port; an emergency shut-off valve 601 and a liquid supply and discharge switch valve 602 are sequentially provided on the liquid supply and discharge pipeline 60;

[0042] The liquid addition and discharge pipeline 60 , the emergency shut-off valve 601 and the liquid addition and discharge switch valve 602 are all arranged in the vacuum interlayer 70 .

[0043] In this embodiment, liquid hydrogen is carried in the liquid addition and discharge pipeline 60, and the addition and discharge port is used to add or discharge liquid hydrogen. When liquid hydrogen needs to be added to the inner shell 10 or discharged from the inner shell 10, the addition and discharge switch valve 602 is opened; conversely, the addition and discharge switch valve 602 is closed to achieve liquid addition or discharge. The liquid addition and discharge pipeline 60, the emergency shut-off valve 601, and the addition and discharge switch valve 602 are all disposed within the outer vacuum interlayer 70. The vacuum environment created by the vacuum interlayer 70 can be used to reduce heat leakage losses in the liquid addition and discharge pipeline 60 and related valves. In addition, the emergency shut-off valve 601 automatically closes when heated to prevent the outflow of liquid hydrogen.

[0044] In some embodiments, as Figure 2 and Figure 3 As shown, the cold storage panel 30 includes a cylinder 301, an upper panel 302 and a lower panel 303; the upper panel 302 and the lower panel 303 are detachably connected to the top and bottom ends of the cylinder 301 respectively, so that the inner shell 10 is easily installed and repaired.

[0045] In some embodiments, a plurality of support assemblies 40 are sequentially arranged along the circumferential direction at the lower end of the cylinder 301. Each support assembly 40 includes a bolt 401, two washers 402, a locking nut 403, and a cylinder 404. One end of the cylinder 404 is a spherical surface, and the other end is provided with a groove, and an internal thread is provided in the groove. A through hole corresponding to each support assembly 40 is provided on the wall of the cylinder 301 for the corresponding bolt 401 to pass through. The two washers 402 are respectively provided on both sides of the wall of the cylinder 301 and are fixed by the bolt 401 and the locking nut 403. The outer end of the bolt 401 faces the side where the housing 20 is located, and the cylinder 404 is screwed onto the outer end of the bolt 401 through the internal thread.

[0046] The gap between the cylinder 404 and the inner wall of the housing 20 is adjusted by adjusting the tightening length of the cylinder 404 and the bolt 401 .

[0047] In this embodiment, the cylinder 404 is preferably made of G10, which has low thermal conductivity. Furthermore, the cylinder 404 does not directly contact the inner wall of the housing 20. Even if contact occurs, it is point contact, resulting in minimal heat leakage. Furthermore, the contact gap is adjustable, allowing for a certain degree of machining tolerance in the roundness of the cylinder 301. Therefore, the support assembly 40 can limit the amount of sway in the cold storage shield 30 while minimizing heat leakage.

[0048] In some embodiments, a first pressure gauge 504 is provided on the gas supply line 501 between the pressure reducing valve 503 and the check valve 505. The first pressure gauge 504 is used to monitor the gas pressure after the pressure reducing valve 503 of the gas supply unit 50 is reduced in pressure, so as to adjust the working parameters of the pressure reducing valve 503 based on the monitored pressure.

[0049] In some embodiments, the system further includes: an overflow pipe 90, an overflow valve 901, and a flow detection meter sequentially arranged on the overflow pipe 90 along the medium flow direction; one end of the overflow pipe 90 is connected to a preset height of the inner shell 10, and the other end is connected to the vent pipe 120;

[0050] When the liquid level in the inner shell 10 is higher than a preset height, excess liquid hydrogen is discharged from the overflow pipe.

[0051] In this embodiment, in order to maintain the stability of the storage tank, a certain amount of gas phase space needs to be maintained, such as a gas phase space of no less than 5%, preferably 10%. That is, the inner shell 10 is set to a filling rate of 90%, leaving 10% of the gas phase space. An overflow pipe 90 is provided at a preset height, i.e., 90% of the liquid level. When the added liquid hydrogen reaches the 90% liquid level, the liquid hydrogen will flow out along the overflow pipe 90, ensuring that the filling rate does not exceed 90% and that 10% of the gas phase space is always left. By providing an overflow monitoring meter 902, when the liquid hydrogen flows through the overflow monitoring meter 902, it can be known that the liquid hydrogen has reached the set filling height, and the addition of liquid hydrogen is stopped.

[0052] In some embodiments, the system further includes: an exhaust pipe 101 and an exhaust valve 102 and a pressure-reducing and regulating valve 103 sequentially arranged on the exhaust pipe 101 along the medium flow direction; one end of the exhaust pipe 101 is connected to the gas phase space at the top of the inner shell 10, and the other end is connected to the vent pipe 120;

[0053] When the pressure in the inner shell 10 is higher than the preset second pressure, the pressure-reducing and regulating valve 103 opens.

[0054] In this embodiment, when the pressure in the inner shell 10 exceeds the set pressure, the pressure-reducing and regulating valve 103 will open to discharge the high-pressure gas into the centralized vent pipe.

[0055] In some embodiments, the invention further comprises: a safety line 110 and a safety valve 111 provided on the safety line 110; one end of the safety line 110 is connected to the gas phase space at the top of the inner shell 10, and the other end is connected to the vent line 120;

[0056] When the pressure in the inner shell 10 is higher than a preset third pressure, the safety valve 111 opens.

[0057] In this embodiment, there can be multiple safety valves 111, and multiple safety valves 111 are arranged in parallel. When the pressure of the inner shell 10 exceeds the set third pressure, the safety valve 111 will open, quickly discharge the high-pressure gas, reduce the pressure of the inner shell 10, and thus protect the safety of the equipment.

[0058] It should be noted that the first pressure, the second pressure and the third pressure increase sequentially and can be set independently according to the performance of the equipment. This application does not make any specific limitations.

[0059] In some embodiments, it further includes: a liquid level pipeline 130 and a liquid level gauge 131 and a second pressure gauge 132 provided on the liquid level pipeline 130; one end of the liquid level pipeline 130 is connected to the bottom end of the inner shell 10, and the other end is connected to the top end of the inner shell 10.

[0060] In this embodiment, the liquid level gauge 131 and the second pressure gauge 132 are disposed outside the outer shell 20 . The liquid level gauge 131 forms a communication vessel with the inner shell 10 to measure the liquid level of the inner shell 10 . The second pressure gauge 132 can measure the air pressure in the inner shell 10 .

[0061] The method of using the tank is:

[0062] 1. Filling with liquid hydrogen

[0063] 1) Before adding liquid hydrogen, close the gas supply valve 506, the boost valve 802, and the exhaust valve 102, open the overflow valve 901, discharge the residual gas in the inner shell 10, and reduce the pressure of the inner shell 10;

[0064] 2) Connect the filling and discharge port to the hydrogen injection equipment;

[0065] 3) Open the filling and discharge switching valve 602 to start filling the inner shell 10 with liquid hydrogen;

[0066] 4) When the liquid hydrogen level reaches 90% of the filling rate, the liquid hydrogen will flow out along the overflow pipe 90, and the overflow monitoring meter 902 will receive a signal. At this time, the filling and discharge switch valve 602 and the overflow valve 901 are closed, and finally the exhaust valve 102 is opened to complete the filling.

[0067] 2. Use of Hydrogen

[0068] 1) Connect the outlet of the gas supply pipeline 501 to the external gas-consuming equipment;

[0069] 2) Open the boost valve 802 and the gas supply valve 506. Liquid hydrogen will flow out from the bottom of the inner shell 10 along the liquid filling and discharge pipeline 60 under the action of gravity, and flow into the boost pipeline 801 along the boost valve 802. When the liquid hydrogen flows through the booster 803, it heats up and vaporizes into hydrogen gas, expanding in volume and increasing in pressure. After passing through the boost and pressure regulating valve 804, the pressure in the inner shell 10 can be stabilized at a first pressure. The first pressure is higher than the gas pressure required by the gas-consuming equipment, thereby generating a pressure differential for the liquid hydrogen.

[0070] 3) Liquid hydrogen enters the gas supply line 501 through the gas supply valve 506 under the action of the pressure difference. Since the gas supply line 501 between the gas supply valve 506 and the vaporizer 502 is spirally wound around the outer wall of the cold storage panel 30, the liquid hydrogen can continuously cool the cold storage panel 30. It then flows to the vaporizer 502, where it is heated by the external air, expands in volume, and increases in pressure. It is then reduced to the pressure required by the gas-consuming equipment through the pressure reducing valve 503 and enters the gas-consuming equipment.

[0071] 3. Use of liquid hydrogen

[0072] 1) Connect the filling and discharge port to the external hydrogen-using equipment;

[0073] 2) Close the gas supply valve 506 and open the boost valve 802. Liquid hydrogen will flow out from the bottom of the inner shell 10 along the liquid supply and discharge pipeline 60 under the action of gravity, and flow into the boost pipeline 801 along the boost valve 802. When the liquid hydrogen flows through the booster 803, it heats up and vaporizes into hydrogen gas, expanding in volume and increasing in pressure. After passing through the boost and pressure regulating valve 804, the pressure in the inner shell 10 can be stabilized at the first pressure.

[0074] 3) Open the addition and discharge switching valve 602, and the liquid hydrogen flows through the addition and discharge switching valve 602 to the addition and discharge port and enters the external hydrogen-using equipment.

[0075] 4. Static Storage

[0076] 1) When hydrogen gas and liquid hydrogen are not needed, the device is in a static state, the gas supply valve 506 and the boost valve 802 are closed, and the inner shell 10 receives heat from the outside through two main methods: heat conduction and heat radiation. The liquid hydrogen continues to absorb heat and vaporize, and the pressure inside the inner shell 10 continues to rise.

[0077] 2) When the pressure inside the inner shell 10 rises to the second pressure, the pressure-reducing and regulating valve 103 on the exhaust line 101 will automatically open, discharging the high-pressure hydrogen into the centralized vent line 120, thereby reducing the pressure inside the inner shell 10. The hydrogen discharged into the centralized vent line 120 will be wasted. The time for the inner shell 10 to rise from normal atmospheric pressure to the second pressure is T, which is called the lossless storage time, which is usually several days. Since the present application uses hydrogen, the liquid hydrogen will be cooled to a lower temperature when flowing through the cold storage shield 30, thereby storing a large amount of cold energy at the cold storage shield 30. The temperature of the cold storage shield 30 is very low, which will isolate the inner shell 10 from most of the external heat radiation. If stored statically for a long time, the temperature of the cold storage shield 30 will slowly rise from about -253°C to about -20°C, thereby extending the lossless storage time of the storage tank and reducing the vaporization rate of liquid hydrogen. The presence of the cold storage shield 30 of the present application can delay the lossless storage time by several times.

[0078] Since the equipment is generally not used continuously for 24 hours, the two most common working conditions are hydrogen use and static storage, which often exist alternately. Therefore, the cold storage screen 30 of the present application can greatly reduce the evaporation rate of liquid hydrogen under static storage conditions, and has high practical value.

[0079] 5. Fire conditions

[0080] 1) Emergency shut-off valve 601 automatically closes due to heat to prevent liquid hydrogen from flowing out;

[0081] 2) The temperature inside the inner shell 10 rises, the liquid hydrogen gradually vaporizes, and the pressure gradually increases. The exhaust pipe 101 is unable to discharge such a large amount of gas. When the pressure rises to the third pressure, the safety valve 111 on the safety valve pipe 111 opens, and a large amount of hydrogen in the inner shell 10 is discharged, so that the pressure of the inner shell 10 is reduced.

[0082] In summary, the present application can provide hydrogen and liquid hydrogen to the outside world. By setting up the cold storage screen 30, the cold capacity of liquid hydrogen can be stored under the working condition of using hydrogen, thereby extending the lossless storage time and significantly reducing the evaporation rate under static storage conditions by about 70%, which has high practical value.

[0083] It should be noted that, in this article, relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical factors in the process, method, article or device comprising the elements.

[0084] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is intended only to illustrate the technical solution of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A liquid hydrogen storage tank with a vaporizer, characterized in that: include: An inner shell (10) for containing liquid hydrogen; The boosting unit (80) comprises a boosting pipeline (801) and a boosting valve (802), a supercharger (803) and a boosting pressure regulating valve (804) sequentially arranged on the boosting pipeline (801) along the flow direction of the medium; one end of the boosting pipeline (801) is connected to the bottom end of the inner shell (10), and the other end is communicated with the gas phase space of the inner shell (10); the boosting valve (802) is used to vaporize and pressure-boost the liquid hydrogen flowing out of the inner shell (10), and the boosting pressure regulating valve (804) is used to control the pressure range to maintain the pressure of the inner shell (10) at a first pressure; The gas supply unit (50) comprises a gas supply pipeline (501) and a gas supply valve (506), a vaporizer (502), a pressure reducing valve (503) and a check valve (505) sequentially arranged on the gas supply pipeline (501) along the flow direction of the medium; one end of the gas supply pipeline (501) is connected to the bottom end of the inner shell (10), and the other end is connected to an external gas-using device; the vaporizer (502) is used to gasify liquid hydrogen into hydrogen gas, and the pressure reducing valve (503) is used to reduce the pressure of the gasified hydrogen gas to the pressure required by the gas-using device; The exhaust unit (100) is in communication with the gas phase space of the inner shell (10) and is used to discharge overpressure gas.

2. The storage tank according to claim 1, characterized in that The outer portion of the inner shell (10) is sequentially covered with a cold storage screen (30) and an outer shell (20), and a vacuum is formed between the inner shell (10) and the outer shell (20); The air supply pipeline (501) between the air supply valve (506) and the vaporizer (502) is wound around the outer wall of the cold storage panel (30) in a spiral manner.

3. The storage tank according to claim 2, characterized in that It also includes a liquid addition and discharge pipeline (60) and a vacuum interlayer (70); one end of the liquid addition and discharge pipeline (60) passes through the outer shell (20) and the cold storage panel (30) and is connected to the bottom end of the inner shell (10), and the other end is a liquid addition and discharge port; the liquid addition and discharge pipeline (60) is sequentially provided with an emergency shut-off valve (601) and a liquid addition and discharge switch valve (602); The liquid addition and discharge pipeline (60), the emergency shut-off valve (601), the liquid addition and discharge switch valve (602), the pressure boosting valve (802) and the air supply valve (506) are all arranged in the vacuum interlayer (70).

4. The storage tank according to claim 2, characterized in that The cold storage screen (30) comprises a cylinder (301), an upper screen (302) and a lower screen (303); the upper screen (302) and the lower screen (303) are detachably connected to the top end and the bottom end of the cylinder (301), respectively.

5. The storage tank according to claim 4, characterized in that At the lower end of the cylinder (301), a plurality of support assemblies (40) are sequentially arranged along the circumferential direction, each of the support assemblies (40) comprises a bolt (401), two washers (402), a locking nut (403) and a cylinder (404), one end of the cylinder (404) is a spherical surface, and the other end is provided with a groove, and an internal thread is provided in the groove; a through hole corresponding to each support assembly (40) is provided on the wall surface of the cylinder (301) for the corresponding bolt (401) to pass through, the two washers (402) are respectively arranged on both sides of the wall surface of the cylinder (301), and are fixed by the bolt (401) and the locking nut (403), the outer end of the bolt (401) faces the side where the housing (20) is located, and the cylinder (404) is screwed onto the outer end of the bolt (401) through the internal thread; The gap between the cylinder (404) and the inner wall of the housing (20) is adjusted by adjusting the tightening length of the cylinder (404) and the bolt (401).

6. The storage tank according to claim 1, characterized in that A first pressure gauge (504) is provided on the gas supply pipeline (501) between the pressure reducing valve (503) and the check valve (505). The first pressure gauge (504) is used to monitor the gas pressure after the pressure is reduced by the pressure reducing valve (503) of the gas supply unit (50).

7. The storage tank according to claim 1, characterized in that Also includes: An overflow pipeline (90) and an overflow valve (901) and an overflow monitoring meter (902) sequentially arranged on the overflow pipeline (90) along the flow direction of the medium; one end of the overflow pipeline (90) is connected to a preset height of the inner shell (10), and the other end is connected to the vent pipeline (120); When the liquid level in the inner shell (10) is higher than the preset height, excess liquid hydrogen is discharged from the overflow pipe.

8. The storage tank according to claim 2, characterized in that The exhaust unit (100) comprises an exhaust pipeline (101) and an exhaust valve (102) and a pressure-reducing and regulating valve (103) sequentially arranged on the exhaust pipeline (101) along the flow direction of the medium; one end of the exhaust pipeline (101) is connected to the gas phase space at the top of the inner shell (10), and the other end is connected to the vent pipeline (120); When the pressure in the inner shell (10) is higher than a preset second pressure, the pressure-reducing and regulating valve (103) opens.

9. The storage tank according to claim 1, characterized in that Also includes: A safety pipeline (110) and a safety valve (111) provided on the safety pipeline (110); one end of the safety pipeline (110) is communicated with the gas phase space at the top of the inner shell (10), and the other end is connected to the vent pipeline (120); When the pressure in the inner shell (10) is higher than a preset third pressure, the safety valve (111) opens.

10. The storage tank according to claim 1, characterized in that Also includes: A liquid level pipeline (130) and a liquid level gauge (131) and a second pressure gauge (132) arranged on the liquid level pipeline (130); one end of the liquid level pipeline (130) is communicated with the bottom end of the inner shell (10), and the other end is communicated with the top end of the inner shell (10).

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