Device and process for cleaning inner surface of organic liquid hydrogen storage tank

Abstract

The organic liquid hydrogen storage tank inner surface cleaning device mainly comprises a bottom plate, the hydrogen storage tank is arranged at the top end of the bottom plate, the side, close to the outer wall of a first motor, of the hydrogen storage tank is sequentially and fixedly connected with a communicating pipe and a control valve, and the two ends of the interior of the communicating pipe are in threaded connection with sealing plugs. The device has the advantages that the lead screw and the two guide rods are arranged in the tank body, the sliding assembly is in threaded connection with the lead screw, meanwhile, the two fixing rings are rotationally connected with the circular guide assembly, and the sliding assembly and the circular guide assembly are driven to circularly move in the length direction of the guide rods through power-on operation of the first motor; and a second motor is electrified to run to drive two fixing rings and a brush plate to rotate forwards and backwards, so that the inner wall of the hydrogen storage tank is conveniently cleaned, a control valve is opened, a cleaning agent and impurities are conveniently discharged, cleaning operation is completed, and the hydrogen storage tank is simple in overall structure, reasonable in design and convenient to popularize and use.

Description

Technical Field

[0001] The present invention relates to the technical field of organic liquid hydrogen storage tanks, and specifically to an inner surface cleaning device and process for an organic liquid hydrogen storage tank. Background Art

[0002] Hydrogen energy is considered an ideal energy source due to its clean and sustainable characteristics, and has been widely applied in fields such as aerospace, transportation, and chemical engineering. However, the large-scale storage and transportation of hydrogen energy remains a bottleneck in its application. Currently, the common storage methods of hydrogen energy are physical methods and chemical methods. Physical methods include high-pressure gaseous hydrogen storage, cryogenic liquid hydrogen storage, and physical adsorption hydrogen storage. Chemical methods include organic liquid hydrogen storage, metal alloy hydrogen storage, and liquid ammonia, methanol hydrogen storage, etc.

[0003] Compared with other common hydrogen storage methods, the organic liquid hydrogen storage method has obvious advantages, and its advantages are mainly reflected in the following aspects: the reaction process is reversible, and the hydrogen storage density is high; the hydrogen carrier is safe and convenient for storage and transportation, suitable for long-distance transportation; existing infrastructure such as gasoline pipelines and gas stations can be utilized. When an organic liquid hydrogen storage tank stores and transports organic liquid, due to side reactions during the reaction process, some components will be carbonized to form impurities, which will adhere or deposit inside the organic liquid hydrogen storage tank. At the same time, during the subsequent dehydrogenation reaction or hydrogenation reaction, the impurities will block the inside of the hydrogenation catalyst and dehydrogenation catalyst, affecting the hydrogenation reaction and dehydrogenation reaction. Based on this, an inner surface cleaning device and process for an organic liquid hydrogen storage tank are proposed to clean the deposited or adhered carbonized impurities. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides an inner surface cleaning device and process for an organic liquid hydrogen storage tank, which have the advantages of effectively cleaning the impurities inside the hydrogen storage tank, etc., and solve the problem of impurities blocking the inside of the hydrogenation catalyst and dehydrogenation catalyst.

[0006] (2) Technical Solutions

[0007] To achieve the purpose of effectively cleaning the impurities inside the hydrogen storage tank, the present invention provides the following technical solutions: An inner surface cleaning device for an organic liquid hydrogen storage tank, characterized in that it includes a bottom plate, a hydrogen storage tank is provided at the top of the bottom plate, a communicating pipe and a control valve are sequentially fixedly connected to one side of the hydrogen storage tank close to the outer wall of the first motor, closed plugs are threadedly connected to both ends inside the communicating pipe, a manhole is provided on the top side of the outer wall of the hydrogen storage tank, and a closed door is provided at its top;

[0008] Two guide rods are fixedly connected to the middle of the hydrogen storage tank along its length direction. A sliding component that moves along its length direction is arranged outside the two guide rods, and a circular guide component is arranged on its outer wall. Two fixing rings that rotate circumferentially along its outer circular surface are arranged on the outer wall of the circular guide component;

[0009] Fixing rods are fixedly connected to the outer walls of the two fixing rings. The two fixing rods are arranged in a straight line. Brush plates are arranged at the ends of the two fixing rods away from each other, and both are of hollow structure. A plurality of bristles are fixedly connected to the sides of the two brush plates away from each other. A plurality of through holes are opened on the outer walls of the two brush plates close to the bristles. Connecting pipes are fixedly connected to the middle parts of the outer walls of the two brush plates close to each other;

[0010] Guide columns are fixedly connected to both sides of the middle parts of the outer walls of the two brush plates close to each other, and the four are respectively slidably connected to the ends of the fixing rods. Springs are slidably connected to the outer walls of the four guide columns. Limit nuts are threadedly connected to the ends of the four guide columns close to each other.

[0011] Preferably, a first motor is fixedly connected to one end of the hydrogen storage tank. The output end of the first motor is fixedly connected to a lead screw, which is located between the two guide rods and is threadedly connected to the sliding component.

[0012] Preferably, the sliding component includes a mounting block and a fixing plate. The mounting block is in a mountain shape and is slidably connected to the two guide rods. The fixing plate is fixedly connected to the bottom end of the mounting block.

[0013] Preferably, a second motor is fixedly connected to the top surface of the mounting block. The output end of the second motor is fixedly connected to a gear. Tooth rings are fixedly connected to the outer circular surfaces of the two fixing rings and are meshed with the gear.

[0014] Preferably, the outer shapes of the two fixing rings are both semi-circular rings. The two ends of the two fixing rings are fixedly connected through fasteners, and their axes coincide with the axis of the hydrogen storage tank.

[0015] Preferably, the circular guide component includes a first guide semi-ring, a second guide semi-ring and two arc-shaped retaining rings. The first guide semi-ring and the second guide semi-ring are both fixedly connected to the sliding component, and one side of both is bent 90 degrees outward. The two arc-shaped retaining rings are fixedly connected to the other side of the first guide semi-ring and the second guide semi-ring.

[0016] Preferably, the outer shapes of the end faces of the two fixing rods close to each other are both arc-shaped, and both are fixedly connected to the outer circular surfaces of the two fixing rings through bolts respectively.

[0017] Preferably, both of the two connecting pipes are connected through a hose and a tee, and the hose penetrates through the communicating pipe and is connected to an external pumping device.

[0018] An inner surface cleaning process for an organic liquid hydrogen storage tank includes the following steps:

[0019] 1) Installation: Open the closing door, the user enters the inside of the hydrogen storage tank through the manhole, installs each part, and then closes the closing door;

[0020] 2) Unscrew the two plugs, pass the connecting pipe through the communicating pipe, and connect it to an external pumping device;

[0021] 3) The first motor is powered on and runs, driving the lead screw to rotate, and driving the sliding assembly, the circular guiding assembly, and the externally provided brush plate to perform a circular motion along the length direction of the guiding rod;

[0022] 4) The second motor is powered on and runs, driving the gear to rotate, and driving the two fixing rings, the two fixing rods, the two brush plates, and several bristles to rotate forward and backward along the outer wall of the circular guiding assembly, so as to facilitate cleaning the inner wall of the hydrogen storage tank;

[0023] 5) The external pumping device is powered on and runs, so as to facilitate pumping the special cleaning agent into the two brush plates and flowing out from several through holes, so as to facilitate cleaning impurities;

[0024] 6) By opening the control valve, it is convenient to discharge the cleaning agent and impurities to complete the cleaning operation.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides an inner surface cleaning device and process for an organic liquid hydrogen storage tank, having the following

[0027] beneficial effects:

[0028] 1. For the inner surface cleaning device and process of the organic liquid hydrogen storage tank, by setting the tank body, a lead screw and two guiding rods are arranged inside it, and the sliding assembly is threadedly connected to the lead screw. At the same time, the two fixing rings are rotatably connected to the circular guiding assembly. By powering on and running the first motor, the sliding assembly and the circular guiding assembly are driven to perform a circular motion along the length direction of the guiding rod. By powering on and running the second motor, the two fixing rings and the brush plate are driven to rotate forward and backward, so as to facilitate cleaning the inner wall of the hydrogen storage tank. By opening the control valve, it is convenient to discharge the cleaning agent and impurities to complete the cleaning operation. The overall structure is simple, the design is reasonable, and it is convenient for popularization and use.

[0029] 2. The inner surface cleaning device and process for an organic liquid hydrogen storage tank are provided with two brush plates which have a hollow structure. The connecting pipe passes through the communicating pipe and is connected to an external pumping device. When the external pumping device is powered on and operates, it is convenient to pump a special cleaning agent into the interiors of the two brush plates and let it flow out through several through holes, thus helping to discharge impurities. The overall structure is detachable, facilitating users to enter the hydrogen storage tank through the manhole for assembly and disassembly operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 FIG. 6 is a schematic structural view of the first perspective of the inner surface cleaning device and process for an organic liquid hydrogen storage tank according to the present invention;

[0031] Figure 2 FIG. 10 is a schematic sectional view of the inner surface cleaning device and process for an organic liquid hydrogen storage tank according to the present invention;

[0032] Figure 3 FIG. 14 is a schematic structural view of the second perspective of the inner surface cleaning device and process for an organic liquid hydrogen storage tank according to the present invention;

[0033] Figure 4 FIG. 18 is a schematic structural view of the third perspective of the inner surface cleaning device and process for an organic liquid hydrogen storage tank according to the present invention;

[0034] Figure 5 FIG. 22 is a schematic assembly view of the circular guiding component of the inner surface cleaning device and process for an organic liquid hydrogen storage tank according to the present invention;

[0035] Figure 6 FIG. 26 is an exploded view of the circular guiding component of the inner surface cleaning device and process for an organic liquid hydrogen storage tank according to the present invention;

[0036] Figure 7 FIG. 30 is an exploded view of the fixing ring of the inner surface cleaning device and process for an organic liquid hydrogen storage tank according to the present invention;

[0037] Figure 8 FIG. 34 is a schematic view of the brush plate structure of the inner surface cleaning device and process for an organic liquid hydrogen storage tank according to the present invention.

[0038] In the figure: 1 - bottom plate, 2 - hydrogen storage tank, 3 - manhole, 4 - closing door, 5 - connecting pipe, 6 - closing plug, 7 - first motor, 8 - control valve, 9 - brush plate, 10 - sliding assembly, 1001 - mounting block, 1002 - fixing plate, 11 - lead screw, 12 - guide rod, 13 - second motor, 14 - fixing rod, 15 - gear, 16 - fixing ring, 17 - toothed ring, 18 - circular guiding assembly, 1801 - first guiding semi - ring, 1802 - second guiding semi - ring, 1803 - arc retaining ring, 19 - connecting pipe, 20 - guiding column, 21 - limit nut, 22 - spring, 23 - through - hole, 24 - brush bristles. Detailed implementation mode

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0040] Please refer to Figure 1-8 , an inner - surface cleaning device and process for an organic - liquid hydrogen storage tank, which includes a bottom plate 1. A hydrogen storage tank 2 is arranged at the top end of the bottom plate 1. A connecting pipe 5 and a control valve 8 are fixedly connected in sequence on one side of the hydrogen storage tank 2 close to the outer wall of the first motor 7. Closing plugs 6 are thread - connected to both ends inside the connecting pipe 5. A manhole 3 is arranged on the top side of the outer wall of the hydrogen storage tank 2, and a closing door 4 is arranged at its top end;

[0041] Two guide rods 12 are fixedly connected along the length direction in the middle of the hydrogen storage tank 2. A sliding assembly 10 that moves along its length direction is arranged outside the two guide rods 12. A circular guiding assembly 18 is arranged on its outer wall. Two fixing rings 16 that rotate circumferentially along its outer circular surface are arranged on the outer wall of the circular guiding assembly 18;

[0042] Fixing rods 14 are fixedly connected to the outer walls of the two fixing rings 16. The two fixing rods 14 are arranged in a straight line. Brush plates 9 are arranged at the ends of the two fixing rods 4 away from each other, and both are of a hollow structure. A number of brush bristles 24 are fixedly connected to the side surfaces of the two brush plates 9 away from each other. A number of through - holes 23 are opened on the outer walls of the two brush plates 9 close to the brush bristles 24. Connecting pipes 19 are fixedly connected to the middle parts of the outer walls of the two brush plates 9 close to each other;

[0043] Guiding columns 20 are fixedly connected to both sides of the middle parts of the outer walls of the two brush plates 9 close to each other, and are respectively slidably connected to the ends of the fixing rods 14. Springs 22 are slidably connected to the outer walls of the four guiding columns 20. Limit nuts 21 are thread - connected to the ends of the four guiding columns 20 close to each other.

[0044] As an alternative technical solution of the present invention:

[0045] One end of the hydrogen storage tank 2 is fixedly connected with a first motor 7, and the output end of the first motor 7 is fixedly connected with a lead screw 11. It is located between two guide rods 12 and is threadedly connected with the sliding assembly 10. The two guide rods 12 facilitate the support and guidance of the movement of the sliding assembly 10. At the same time, it is threadedly connected with the lead screw 11, so as to facilitate the relative rotation between the lead screw 11 and the sliding assembly 10 by the energized operation of the first motor 7, thereby driving the sliding assembly 10 to move along the length direction of the guide rod 12, so as to drive a plurality of bristles 24 to clean the inner wall of the hydrogen storage tank 2.

[0046] As an alternative technical solution of the present invention:

[0047] The sliding assembly 10 includes a mounting block 1001 and a fixing plate 1002. The outer shape of the mounting block 1001 is mountain-shaped, and it is slidably connected with the two guide rods 12. The fixing plate 1002 is fixedly connected to the bottom end of the mounting block 1001, and both ends of the fixing plate 1002 are fixedly connected to the bottom end of the mounting block 1001 through bolts, so as to facilitate the installation of the sliding assembly 10 on the two guide rods 12 to guide the movement of the sliding assembly 10. At the same time, the sliding assembly 10 is installed in a split manner, which is convenient for the user to install and disassemble.

[0048] As an alternative technical solution of the present invention:

[0049] The top surface of the mounting block 1001 is fixedly connected with a second motor 13, and its output end is fixedly connected with a gear 15. Tooth rings 17 are fixedly connected to the outer circumferential surfaces of the two fixing rings 16, and they are meshed with the gear 15. The second motor 13 is a reduction motor, so as to facilitate the output end of the second motor 13 to have a greater torque, and it is convenient to drive the two fixing rings 16, the two fixing rods 14, the two brush plates 9, and a plurality of bristles 24 to rotate through the meshing of the gear and the tooth ring 17, so as to facilitate the cleaning of the inner wall of the hydrogen storage tank 2.

[0050] As an alternative technical solution of the present invention:

[0051] The outer shapes of the two fixing rings 16 are both semi-circular. Both ends of the two fixing rings 16 are fixedly connected through fasteners, and their axes coincide with the axis of the hydrogen storage tank 2. In this way, the two fixing rings 16 can be installed on the outer wall of the circular guide assembly 18, and the two fixing rings 16 are driven to rotate along the outer wall of the circular guide assembly 18 by the energized operation of the second motor 13, so as to drive a plurality of bristles 24 to clean the inner wall of the hydrogen storage tank 2.

[0052] As an alternative technical solution of the present invention:

[0053] The circular guiding component 18 includes a first guiding half-ring 1801, a second guiding half-ring 1802 and two arc-shaped retaining rings 1803. Both the first guiding half-ring 1801 and the second guiding half-ring 1802 are fixedly connected to the sliding component 10, and one side of both of them is bent outward by 90 degrees. The two arc-shaped retaining rings 1803 are fixedly connected to the other sides of the first guiding half-ring 1801 and the second guiding half-ring 1802, which is convenient for limiting the rotation of the two fixing rings 16. At the same time, the split installation is adopted, which is convenient for reducing the weight of multiple parts and facilitating the user to perform the assembly operation inside the hydrogen storage tank 2.

[0054] As an alternative technical solution of the present invention:

[0055] The outer shapes of the end faces of the two fixing rods 14 close to each other are both arc-shaped, and both of them are fixedly connected to the outer circular surfaces of the two fixing rings 16 through bolts respectively, which is convenient for fixedly connecting the arc-shaped surfaces of the two fixing rods 14 to the two fixing rings 16. The arc-shaped structure can fit more closely to the outer walls of the two fixing rings 16.

[0056] As an alternative technical solution of the present invention:

[0057] Both of the two connecting pipes 19 are connected and communicated through a hose and a three-way pipe. The hose penetrates through the communicating pipe 5 and is connected and communicated with an external pumping device. When cleaning the hydrogen storage tank 2, it is necessary to remove the closing plugs 6 at both ends of the communicating pipe 5, and then it is convenient for the hose to penetrate through the inside of the communicating pipe 5 and be connected and communicated with the two connecting pipes 19 through the three-way pipe respectively. Through the external pumping device, cleaning agents and the like are pumped into the hydrogen storage tank 2 to clean the impurities, and then they are discharged through the two control valves 8.

[0058] An inner surface cleaning process of an organic liquid hydrogen storage tank, which is applied to an inner surface cleaning device of an organic liquid hydrogen storage tank according to any one of claims 1 to 8, is characterized by including the following steps:

[0059] 1) Installation: Open the closing door 4, the user enters the inside of the hydrogen storage tank 2 through the manhole 3, installs each part of the parts, and then closes the closing door 4;

[0060] 2) Unscrew the two plugs 6, make the connecting pipe 19 pass through the communicating pipe 5, and connect it with an external pumping device;

[0061] 3) The first motor 7 is powered on and runs, driving the lead screw 11 to rotate, and driving the sliding component 10, the circular guiding component 18 and the externally provided brush plate 9 to perform a circular motion along the length direction of the guiding rod 12;

[0062] 4) The second motor 13 is powered on and operates, driving the gear 15 to rotate, and driving the two fixing rings 16, the two fixing rods 14, the two brush plates 9, and a number of bristles 24 to rotate forward and backward along the outer wall of the circular guiding component 18, facilitating the cleaning of the inner wall of the hydrogen storage tank 2;

[0063] 5) The external pumping equipment is powered on and operates, facilitating the pumping of the special cleaning agent into the interiors of the two brush plates 9 and flowing out from a number of through holes 23, facilitating the cleaning of impurities;

[0064] 6) By opening the control valve 8, it is convenient to discharge the cleaning agent and impurities, completing the cleaning operation.

[0065] All the electrical components appearing in this text are electrically connected to the external main controller and the 220V mains power supply, and the main controller can be a conventional known device such as a computer for control.

[0066] In summary, for this inner surface cleaning device and process of an organic liquid hydrogen storage tank, by setting the tank body 1 with a lead screw 11 and two guiding rods 12 arranged inside it, and the sliding component 10 being threadedly connected to the lead screw 11, while the two fixing rings 16 are rotatably connected to the circular guiding component 18, by powering on and operating the first motor 7, driving the sliding component 10 and the circular guiding component 18 to perform a cyclic movement along the length direction of the guiding rod 12, by powering on and operating the second motor 13, driving the two fixing rings 16 and the brush plates 9 to rotate forward and backward, thus facilitating the cleaning of the inner wall of the hydrogen storage tank 2, opening the control valve 8, facilitating the discharge of the cleaning agent and impurities, completing the cleaning operation, the overall structure is simple, the design is reasonable, and it is convenient for popularization and use. By setting two brush plates 9 with a hollow structure, the connecting pipe 19 passes through the communicating pipe 5 and is communicated with the external pumping equipment. The external pumping equipment is powered on and operates, facilitating the pumping of the special cleaning agent into the interiors of the two brush plates 9 and flowing out from a number of through holes 23, thus contributing to the discharge of impurities. The overall structure is detachable, facilitating the user to enter the interior of the hydrogen storage tank 2 through the manhole 3 for installation and disassembly operations.

[0067] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising one" does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0068] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for cleaning the inner surface of an organic liquid hydrogen storage tank, characterized in that: It comprises a bottom plate, a hydrogen storage tank is arranged on the top of the bottom plate, a connecting pipe and a control valve are fixedly connected in sequence on one side of the hydrogen storage tank close to the outer wall of the first motor, both ends of the connecting pipe are threadedly connected with closed plugs, a manhole is arranged on the top side of the outer wall of the hydrogen storage tank, and a closed door is arranged on the top of the manhole; The middle part of the hydrogen storage tank is fixedly connected with two guide rods along its length direction, and the outside of the two guide rods is provided with a sliding assembly moving along its length direction, and the outer wall thereof is provided with a circular guide assembly, and the outer wall of the circular guide assembly is provided with two fixing rings rotating in a circle along its outer circumference; The outer walls of the two fixing rings are fixedly connected with fixing rods, the two fixing rods are arranged in a straight line, the ends of the two fixing rods away from each other are provided with brush plates, and both are hollow structures, the sides of the two brush plates away from each other are fixedly connected with a plurality of bristles, the outer walls of the two brush plates close to the bristles are provided with a plurality of through holes, and the middle parts of the outer walls of the brush plates close to each other are fixedly connected with connecting pipes; Guide columns are fixedly connected on both sides of the middle part of the outer wall where the two brush plates are close to each other, and the ends of the four fixed rods are slidably connected. The outer walls of the four guide columns are slidably connected with springs, and the ends of the four guide columns close to each other are threadedly connected with limiting nuts.

2. The device for cleaning the inner surface of an organic liquid hydrogen storage tank according to claim 1, characterized in that: One end of the hydrogen storage tank is fixedly connected to a first motor, and an output end of the first motor is fixedly connected to a lead screw, which is located between the two guide rods and is threadedly connected to the sliding assembly.

3. The device for cleaning the inner surface of an organic liquid hydrogen storage tank according to claim 2, characterized in that: The sliding assembly comprises a mounting block and a fixing plate. The mounting block is in a mountain shape and is slidably connected to the two guide rods. The fixing plate is fixedly connected to the bottom end of the mounting block.

4. The device for cleaning the inner surface of an organic liquid hydrogen storage tank according to claim 3, characterized in that: The top surface of the mounting block is fixedly connected with a second motor, the output end of which is fixedly connected with a gear, and the outer circumferential surfaces of the two fixing rings are fixedly connected with a gear ring which meshes with the gear.

5. The device for cleaning the inner surface of an organic liquid hydrogen storage tank according to claim 4, characterized in that: The two fixing rings are both half-ring in shape, both ends of the two fixing rings are fixedly connected by fasteners, and the axes of the two coincide with the axis of the hydrogen storage tank.

6. The device for cleaning the inner surface of an organic liquid hydrogen storage tank according to claim 5, characterized in that: The circular guide assembly includes a first guide half ring, a second guide half ring and two arc-shaped retaining rings. The first guide half ring and the second guide half ring are both fixedly connected to the sliding assembly, and one side of both is bent ninety degrees outward, and the two arc-shaped retaining rings are fixedly connected to the other sides of the first guide half ring and the second guide half ring.

7. The device for cleaning the inner surface of an organic liquid hydrogen storage tank according to claim 6, characterized in that: The shapes of the end surfaces of the two fixing rods close to each other are both arc-shaped, and both are fixedly connected to the outer circumferential surfaces of the two fixing rings respectively through bolts.

8. The device for cleaning the inner surface of an organic liquid hydrogen storage tank according to claim 7, characterized in that: The two connecting pipes are both connected through a hose and a three-way pipe, and the hose passes through the connecting pipe and is connected to an external pumping device.

9. A process for cleaning the inner surface of an organic liquid hydrogen storage tank, applied to an inner surface cleaning device of an organic liquid hydrogen storage tank as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: 1) Installation: Open the closed door, the user enters the interior of the hydrogen storage tank through the manhole, installs various parts, and then closes the closed door; 2) Unscrew the two plugs to allow the connecting pipe to pass through the connecting pipe and connect with the external pumping equipment; 3) The first motor is powered on to drive the screw rod to rotate, and the sliding assembly, the circular guide assembly and the brush plate provided on the outside are driven to perform circular motion along the length direction of the guide rod; 4) The second motor is powered on to drive the gear to rotate, driving the two fixing rings, the two fixing rods, the two brush plates and the plurality of bristles to rotate forward and reversely along the outer wall of the circular guide assembly, so as to facilitate cleaning the inner wall of the hydrogen storage tank; 5) The external pumping equipment is powered on to pump the special cleaning agent into the inside of the two brush plates and out through a number of through holes to clean the impurities; 6) By opening the control valve, the cleaning agent and impurities can be released to complete the cleaning operation.

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