KR20230146314A - Liquid hydrogen tank - Google Patents

Abstract

The present invention relates to a liquefied hydrogen tank. Heat loss can be minimized by improving the insulation function of the inner spherical tank, and when a force acts to raise the inner spherical tank due to the internal pressure of the inner spherical tank and an earthquake, the force is reduced. The purpose is to suppress the vertical rise, horizontal movement, and rotation of the internal spherical tank while absorbing it.
The liquefied hydrogen tank according to the present invention includes an external spherical tank; an inner spherical tank accommodated in the inner space of the outer spherical tank, the outer surface of which is spaced apart from the inner surface of the outer spherical tank, and a storage space formed therein; and a support portion that generates a support force while connecting the inner surface of the outer spherical tank and the outer surface of the inner spherical tank.

Description

Liquefied hydrogen tank {LIQUID HYDROGEN TANK}

The present invention relates to a liquefied hydrogen tank, and more specifically, to provide a liquefied hydrogen tank that can minimize heat loss by improving the insulation function of the inner spherical tank and protect the inner spherical tank from external forces or earthquakes. There is a purpose.

Recently, the demand for energy has been continuously increasing due to the rapid development of industrialization and increase in population. Accordingly, there is an urgent need for alternative energy supply due to the depletion of fossil fuels. In particular, in the case of Korea, energy consumption is ranked among the top 10 in the world. Although we are consuming such a large amount of energy, we are dependent on foreign imports for more than 90% of the energy we use, so measures to secure energy are urgently needed.

Accordingly, hydrogen fuel is being considered as an alternative energy that is attracting attention to solve the complex energy problems facing the world.

This hydrogen fuel is not only the most abundant element on Earth after carbon and nitrogen, but is also a clean energy source that generates only a very small amount of nitrogen oxides during combustion and does not emit any other pollutants, and is a source of abundant energy that exists on Earth. It can be made using water as a raw material, and since it is recycled back to water after use, it can be said to be an optimal alternative energy source with no fear of depletion.

The most important challenge in using this hydrogen fuel is how to store hydrogen. Methods for storing hydrogen include compressing and storing hydrogen gas, storing it by liquefying it, or using a hydrogen storage alloy. However, the technology currently in use uses a method of compressing and storing hydrogen gas. there is. However, vaporized hydrogen has a small storage capacity and poor storage efficiency, so liquefied hydrogen is attracting attention as a form of storage and transportation in the future liquefied hydrogen energy society.

Here, liquid hydrogen refers to hydrogen gas that has been 'liquefied' like water. The liquid hydrogen storage method is to cool the liquefied hydrogen to a cryogenic temperature (-253 degrees Celsius) and store it, making it about 240 times more liquefied than gaseous hydrogen based on atmospheric pressure. Hydrogen can be stored.

In addition, it has the highest energy storage density per unit volume and unit weight, and has the advantage of being able to be utilized immediately through simple vaporization without the need for other processes.

In addition, as the liquefied hydrogen market grows in the future, large-scale transportation of liquefied hydrogen by ship can be carried out, and among the above methods, the method of liquefying and storing hydrogen is recognized as a technology suitable for large-scale storage and long-distance transportation of hydrogen.

Currently, most technologies for liquefied hydrogen (LH2) storage tanks that store liquefied hydrogen are for small tanks for land use.

The structure of the existing liquefied natural gas (LNG) storage tank allows storage at a low pressure at a temperature of -162 degrees Celsius or lower, but liquefied hydrogen requires pressurization at a lower temperature than liquefied natural gas, so the previously known liquefied hydrogen is used. A more stringent solution than natural gas storage technology is needed.

로 극저온의 액화천연가스(-162

보다 더 낮은 액화 온도를 가지는 저비점 특성을 가지므로 액화천연가스보다 기화가 더 쉽게 촉진되며, 체적당 증발률(BOR: Boil-Off Rate)은 액화천연가스의 10배에 달한다.Liquid hydrogen has a liquefaction temperature of -253

Cryogenic liquefied natural gas (-162

Because it has a low boiling point characteristic with a lower liquefaction temperature, evaporation is promoted more easily than liquefied natural gas, and the evaporation rate per volume (BOR: Boil-Off Rate) is 10 times that of liquefied natural gas.

At this time, the device for storing liquefied hydrogen is largely accommodated inside a spherical external tank and the external tank, and may include a support for supporting the spherical internal tank and external tank for storing liquefied hydrogen.

However, the conventional liquefied hydrogen storage device had a minimal function of suppressing the flow such as vertical movement, horizontal movement, and rotation of the internal tank when the liquid hydrogen was vaporized and the pressure of the liquid hydrogen was generated or an earthquake occurred. There is a problem in that structural stability is not secured, such as not having a function to return to the original position if it floats.

Therefore, there is an urgent need to develop a device that can return the inner tank to its original position when it flows while minimizing the flow of the inner tank due to evaporation of liquefied hydrogen or an earthquake.

Public Patent Publication No. 10-2020-0007445

The present invention was developed to solve the problems of the prior art described above, and can minimize heat loss by improving the insulation function of the inner spherical tank, and can reduce the internal pressure of the inner spherical tank and the force trying to raise the inner spherical tank due to earthquakes, etc. The purpose is to provide a liquefied hydrogen tank that can absorb the force and suppress the vertical rise, horizontal movement, and rotation of the internal spherical tank when this action occurs.

A liquefied hydrogen tank according to an embodiment of the present invention includes an external spherical tank; an inner spherical tank accommodated in the inner space of the outer spherical tank, the outer surface of which is spaced apart from the inner surface of the outer spherical tank, and a storage space formed therein; and a support portion that generates a support force while connecting the inner surface of the outer spherical tank and the outer surface of the inner spherical tank.

And, the support part includes first and second support members coupled to the inner surface of the outer spherical tank and the outer surface of the inner spherical tank so as to be positioned diagonally to each other; And a fixture on one side and the other side of which is fixed to the first support member and the second support member, respectively, to secure the inner spherical tank.

In addition, the first support member and the second support member are applied in plural numbers and are coupled to the inner surface of the outer spherical tank and the outer surface of the inner spherical tank to be spaced apart from each other, and the fixing member is provided in one first support member at least two Two or more fixtures are connected, where the upper side is jointly fixed to one selected first support member, and the lower side is jointly fixed to different second supports.

And, an insulation material installed on the outer surface of the inner spherical tank in a section where the support portion is not installed; And it fills the space between the external spherical tank and the insulation material, and further includes at least one of a thermal insulation part made of perlite material, while sucking air from the space between the external spherical tank and the insulation material. The space between the external spherical tank and the insulation material is made into a vacuum state by filling the insulation part.

In addition, a plurality of supports support the external spherical tank at a certain distance from the ground and are arranged at a certain distance from each other; And a reinforcing part that protects the support from the load of the outer spherical tank and the inner spherical tank transmitted to the lower part of the support, wherein the reinforcing part is a receiving box formed with a receiving space for accommodating the lower side of the support, respectively. ; Each is accommodated in the receiving space of the receiving box, and is disposed on the front, rear, left, and right sides of the support to prevent the support from shaking in the front, rear, left, and right directions, and the upper and lower sides are aligned with the support and the receiving box. Each of the waveform supports is coupled to an inclined structure and is formed in a waveform shape to cushion and support the support; A first member is in contact with the left side of the support, a first fastening hole is formed, and both ends of the first member are bent in a right angle direction to contact 1/2 areas of the front and rear sides of the support, and a second fastening member is in contact with the left side of the support. a first wrapping portion including a second member in which a hole is formed; A third member is in contact with the right side of the support, is bent at a right angle at both ends of the third member and is in contact with the remaining 1/2 area of the front and back sides of the support, and a fourth fastener is in contact with the right side of the support. a second wrapping portion including a fourth member in which a hole is formed; A flow suppressor that penetrates from the outside of the box in the direction of the receiving space and is respectively fastened to the first fastening hole, the second fastening hole, the third fastening hole, and the fourth fastening hole, the end of which pressurizes and secures the support. ; A box-shaped metal weight part formed of a metal material, and a receiving space in which the box part is accommodated is formed therein; a measuring unit arranged to face the front, rear, left side, and right side of the support, respectively, to measure the distance from the support; a support plate disposed to face the front, rear, left, and right sides of the support, respectively; Tubes disposed on the front, rear, left, and right sides of the support, respectively, and to which the support plate is coupled to one side, respectively; Housings that accommodate each of the tubes and are fixed to an upper surface of the metal weight portion; And when the distance to the support measured by the measuring unit becomes shorter than a preset distance, it includes a pump that supplies water to the inside of the tube to expand the tube, thereby allowing the support plate to support the support.

The liquefied hydrogen tank according to the present invention can minimize heat loss by improving the insulation function of the inner spherical tank, and absorbs the force when a force is applied to raise the inner spherical tank due to the internal pressure of the inner spherical tank and an earthquake. It has the effect of suppressing the vertical rise, horizontal movement, and rotation of the internal spherical tank.

1 is a front cross-sectional view showing a liquefied hydrogen tank according to an embodiment of the present invention.
Figure 2 is a perspective view showing a state in which the external spherical tank, the internal spherical tank, and the support part applied to the liquefied hydrogen tank according to an embodiment of the present invention are connected.
Figure 3 is a diagram showing a reinforcement applied to a liquefied hydrogen tank according to an embodiment of the present invention.
Figure 4 is a plan view showing a reinforcement applied to a liquefied hydrogen tank according to an embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to be understood by those skilled in the art. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Throughout the specification, similar parts are given the same reference numerals.

Figure 1 is a front cross-sectional view showing a liquefied hydrogen tank according to an embodiment of the present invention, and Figure 2 shows a state in which the external spherical tank and the internal spherical tank and the support portion applied to the liquefied hydrogen tank according to an embodiment of the present invention are connected. This is a perspective view.

The liquefied hydrogen tank according to an embodiment of the present invention can protect the inner spherical tank 20 from radiant heat to minimize thermal conductivity and at the same time maintain the gap between the outer spherical tank 10 and the inner spherical tank 20. , It is a product that can maintain the shape of the internal spherical tank (20) stably by preventing its rotation while preventing vertical and horizontal movement.

To this end, the liquefied hydrogen tank according to an embodiment of the present invention includes at least one of an external spherical tank 10, an internal spherical tank 20, a support part 30, an insulating material 40, and a thermal insulation part 50. It may contain more than one.

The outer spherical tank 10 is exposed to the outside and is affected by the atmosphere, and in order to insulate the inner spherical tank 20, the inner spherical tank 20 is prevented from being exposed to the outside.

The external spherical tank 10 shares the internal pressure applied to the internal spherical tank 20, thereby performing the function of evenly supporting the internal pressure of the internal spherical tank 20.

The external spherical tank 10 may be made of steel material to withstand stress, load, etc. transmitted from the internal spherical tank 20.

That is, the outer spherical tank 10 may be made of steel, unlike the inner spherical tank 20, which directly stores liquefied hydrogen.

This external spherical tank 10 is supported by a support 160 at a certain distance from the ground.

The supports 160 are applied in plural pieces and support the external spherical tank 10 while being spaced apart from each other.

The portion of the support 160 that is in contact with the outer surface of the external spherical tank 10 may be formed in a curved shape so as to be in close contact with the outer surface of the external spherical tank 10.

The number of supports 160 applied varies depending on the diameter of the external spherical tank 10.

The inner spherical tank 20 is accommodated in the inner space of the outer spherical tank 10, and its outer surface is spaced apart from the inner surface of the outer spherical tank 10.

In addition, the internal spherical tank 20 can store liquefied hydrogen by forming a storage space therein.

The inner spherical tank 20 is in direct contact with liquefied hydrogen and is made of a material with excellent low-temperature characteristics that can withstand the extremely low temperature of liquefied hydrogen.

For example, the inner spherical tank 20 may be made of aluminum or aluminum alloy material.

Due to the dual structure of the external spherical tank 10 and the internal spherical tank 20, the liquefied hydrogen stored inside the internal spherical tank 20 can be maintained in a cryogenic state.

The outer spherical tank 10 and the inner spherical tank 20 described above are formed in a spherical shape so that the internal pressure of liquefied hydrogen can be evenly distributed.

The support portion 30 is configured to generate a support force while connecting the inner surface of the outer spherical tank 10 and the outer surface of the inner spherical tank 20.

To this end, the support part 30 may include a first support member 31, a second support member 32, and a fixing table 33.

The first support member 31 is fixed to the inner surface of the external spherical tank 10.

The first support member 31 functions to fix the upper side of the fixture 33 to the inside of the external spherical tank 10.

For this purpose, a through hole through which the upper side of the fixture 33 is installed is formed in the first support member 31.

These first supports 31 are applied in plural numbers and fixed at regular intervals along the inner periphery of the external spherical tank 10.

The second support member 32 is fixed to the outer surface of the inner spherical tank 20.

The second support member 32 is fixed at a lower position than the first support member 31.

Accordingly, the first support member 31 and the second support member 32 are positioned diagonally to each other in the upward and downward directions.

The second support member 32 functions to fix the lower side of the fixture 33 to the outside of the inner spherical tank 20.

For this purpose, a through hole through which the lower side of the fixture 33 is installed is formed in the second support member 32.

These second supports 32 are applied in plural numbers and fixed at regular intervals along the circumferential surface of the inner spherical tank 20.

The upper side of the fixture 33 is installed through the through hole of the first support member 31, and the lower side is installed through the through hole of the second support member 32.

Nuts may be fastened to a portion of the fixture 33 that protrudes upward from the first support member 31 and a portion that protrudes downward from the second support member 32, respectively.

The nut is fastened to the upper and lower sides of the fixture 33 and is in close contact with the upper surface of the first support member 31 and the bottom surface of the second support member 32, respectively, so that the fixture 33 is connected to the first support member 31 and the second support member 32. 2 Prevents separation from the support member (32).

When the nut is fastened to the fixing base 33, tension and compression force are simultaneously generated in the fixing base 33, causing the internal spherical tank 20 to rise, move in the horizontal direction, or move in a predetermined direction due to external force, earthquake, internal pressure of the internal spherical tank, etc. Even if it is rotated at an angle, it can be returned to its original position.

The first support member 31 and the second support member 32 described above are applied in plural numbers and are coupled to the inner surface of the outer spherical tank 10 and the outer surface of the inner spherical tank 20, respectively, at a distance from each other.

And, as shown in FIG. 2, at least two fixing bars 33 may be coupled to the first support member 31.

At this time, at least two fixtures 33 may be coupled to the first support member 31 .

In addition, at least two fixtures 33 may be coupled to one first support member 31 .

That is, the upper side of the fixture 33 may be jointly fixed to one selected first support member 31, and the lower side may be jointly fixed to different second supports 32.

At this time, the fixture 33 is fixed to the first support member 31 and the second support member 32 in an inclined form.

Accordingly, the combined shape of the fixtures 33 forms approximately a sawtooth wave shape.

The outer spherical tank 10 and the inner spherical tank 20 are integrally coupled by the first support member 31, the second support member 32, and the fixing stand 33.

In particular, the first support member 31, the second support member 32, and the fixture 33 connect the outer spherical tank 10 and the inner spherical tank 20 in an evenly distributed state. And, the first support member 31 is fixed to the outer spherical tank 10, the second support member 32 is fixed to the inner spherical tank 20, and the fixture 33 is fixed to the first support member 31. And by being fixed to the second support member 32, horizontal support force and vertical support force can be secured, suppressing the vertical movement of the inner spherical tank 20 and the horizontal movement while generating a reaction force against rotation. You can.

As a result, the structural stability of the liquefied hydrogen tank can be secured.

Furthermore, it is possible to make the length of the fixture 33, which is the connection point between the outer spherical tank 10 and the inner spherical tank 20, as long as possible, thereby increasing the resistance to heat conduction of the inner spherical tank 20. .

Furthermore, in a conventional liquefied hydrogen tank, the horizontal and vertical supports were installed separately, but in this case, both the horizontal and vertical supports connected the outer spherical tank and the inner spherical tank, resulting in heat loss in the inner spherical tank. However, compared to the conventional liquefied hydrogen tank, the liquefied hydrogen tank according to an embodiment of the present invention applies only the support part 30, so the connection of the outer spherical tank 10 and the inner spherical tank 20 by the support part 30 points can be reduced. This can improve temperature shielding.

That is, the liquefied hydrogen tank according to an embodiment of the present invention can support the internal spherical tank 20 and improve temperature shielding ability compared to the prior art. In addition, since only the support portion 30 is applied to the support structure of the inner spherical tank 20, there is an economical advantage in terms of cost.

Meanwhile, the liquefied hydrogen tank according to an embodiment of the present invention may further include at least one of an insulating material 40 for thermal insulation and a thermal insulation unit 50 for thermal insulation, as shown in FIG. 1.

Although the drawing shows an example in which the insulation material 40 and the warming unit 50 are applied simultaneously, only the insulation material 40 or only the insulation unit 50 may be applied.

The insulation material 40 may be installed in an uninstalled section on the outer surface of the inner spherical tank 20 where the second support member 32 is not installed.

The insulation material 40 may be formed of a sheet of urethane material or glass wool material.

의 온도를 유지할 수 있도록 한다.The insulation material 40 prevents air from leaking out of the inner spherical tank 20 and prevents solar heat and radiant heat acting on the outer spherical tank 10 from being conducted to the inner spherical tank 20. As a result, liquefied hydrogen is -253

to maintain the temperature.

At this time, if the insulation material 40 is thin, it may be applied in a form of stacking at least two or more layers.

The thermal insulation unit 50 may be formed of perlite in powder form and filled in the space between the external spherical tank 10 and the insulation material 40.

At this time, the thermal insulation unit 50 can be filled while creating a vacuum in the space between the external spherical tank 10 and the insulation material 40.

For this purpose, an intake port and a filling port are formed in the external spherical tank 10, respectively, and a known air suction device capable of sucking air is connected to the intake port to fill the space between the external spherical tank 10 and the insulation material 40. By sucking in the existing air and at the same time filling the filling port with perlite in powder form through a known air supply device that generates compressed air, such as an air compressor, the space between the external spherical tank 10 and the insulation material 40 is filled. can be vacuum kept warm.

At this time, the intake port and filling port may be closed with a stopper (not shown) when the vacuum and pearlite filling operations are completed.

By making the space between the external spherical tank 10 and the insulation material 40 into a vacuum state, convection can be prevented from occurring, thereby preventing the temperature of the internal spherical tank 20 and the liquefied hydrogen from increasing. there is.

Furthermore, the thermal insulation unit 50 protects the internal spherical tank 20 from radiant heat by insulating the space between the external spherical tank 10 and the insulating material 40 to minimize thermal conductivity, thereby lowering the temperature of the internal spherical tank 20. can be prevented from rising, thereby preventing liquefied hydrogen from vaporizing.

Meanwhile, with reference to FIGS. 3 and 4, the reinforcement portion 170 applied to the liquefied hydrogen tank according to an embodiment of the present invention will be described.

Figure 3 is a diagram showing a reinforcement portion applied to a liquefied hydrogen tank according to an embodiment of the present invention, and Figure 4 is a plan view showing a reinforcement portion applied to a liquefied hydrogen tank according to an embodiment of the present invention.

The load of the external spherical tank 10 and the internal spherical tank 20 is transmitted to the lower part of the support 160.

Therefore, in order to ensure the structural stability of the support 160, the external spherical tank 10, and the internal spherical tank 20, the support 160 must be reinforced.

The reinforcing part 170 includes a receiving box 171, a corrugated support part 172, a first wrapping part 173, a second wrapping part 174, and a flow forming part to reinforce the support 160. It includes at least one of a restraining part 175, a metal weight part 176, a measuring part 177, a support plate 178, a tube 179, a housing 170a, and a pump 170b. can do.

The receiving box 171 may be seated on the ground or buried in the ground at a certain depth.

The receiving box 171 is formed in the shape of a rectangular box with an open upper surface and a receiving space formed inside, so that the lower side of the support 160 can be accommodated in the receiving space.

The waveform support portions 172 (172) are each accommodated in the receiving space of the receiving box 171, and are used to prevent the support 160 from shaking in the front, rear, left, and right directions. ,It is arranged on the right side, and the upper and lower sides are coupled to the support 160 and the receiving box 171 in an inclined structure, respectively.

The waveform support portion 172 (172) is formed in a waveform shape to cushion and support the support 160, and may be made of a metal material.

These corrugated supports 172 and 172 elastically support the front, rear, left, and right sides of the support 160, respectively, so that the support 160 supports the load of the external spherical tank 10 and the internal spherical tank 20. , prevents bending due to earthquakes or other external forces.

The first wrapping portion 173 is in contact with the left side of the support 160, and is bent in a right angle direction at both ends of the first member 1731 and the first member 1731 on which the first fastening hole 1731a is formed. It may include a second member 1732 that is in contact with 1/2 areas of the front and rear surfaces of the support 160 and has a second fastening hole 1732a formed thereon.

The second wrapping portion 174 is in contact with the right side of the support 160, and is bent in a right angle direction at both ends of the third member 1741 and the third member 1741 on which the third fastening hole 1741a is formed, respectively, to provide support. It may include a fourth member 1742 that is in contact with the remaining 1/2 area of the front and rear surfaces of 160 and has a fourth fastening hole 1742a formed thereon.

The flow suppression unit 175 penetrates from the outside of the box toward the receiving space and includes the first fastening hole 1731a, the second fastening hole 1732a, the third fastening hole 1741a, and the fourth fastening hole 1742a. ) are each fastened to each other, and the ends pressurize and secure the support 160, thereby suppressing the flow of the support 160 and ensuring the structural stability of the external spherical tank 10, the internal spherical tank 20, and the support 160. Secure.

In this way, after fixing the support 160 with the flow restraining part 175, the receiving box 171 is accommodated in the inner space of the metal weight part 176.

The metal weight portion 176 may be formed in the shape of a square box with an open upper surface and a receiving space formed inside.

The receiving box 171 is accommodated in the receiving space of the metal weight portion 176.

The metal weight portion 176 may be made of a metal material to prevent the support 160 from flowing on its own when trying to move in the horizontal direction, and may have a weight of approximately 50 kg to 200 kg.

Since the metal weight portion 176 does not flow on its own, it can also suppress the flow of the support 160.

The measuring unit 177 is arranged to face the front, rear, left, and right sides of the support 160, respectively, and measures the distance to the support 160.

The measuring unit 177 may be applied as a distance measuring device using a laser or as one of various measuring devices that measure the distance to an object that is encountered.

The support plate 178 is arranged to face the front, rear, left, and right sides of the support 160, respectively.

The tube 179 is disposed on the front, rear, left, and right sides of the support 160, respectively, and a support plate 178 is coupled to one side.

The inner space of the tube 179 is filled with approximately 80% to 90% of water.

The tube 179 may gradually expand as it is filled with water.

This tube 179 may be formed into a substantially circular, oval, or polygonal shape.

Tubes 179 are each accommodated inside the housing 170a.

The housing 170a is fixed to the upper surface of the metal weight portion 176 to prevent the tube 179 from flowing.

The pump 170b is connected to a separate water storage tank (not shown) and can supply water to the inside of the tube 179.

The measuring unit 177 measures the distance to the support 160 in real time, and when the measured distance to the support 160 becomes shorter than the preset distance, the measurement unit 177 transmits the data to an electrically connected control unit (not shown).

When a signal is transmitted from the measuring unit 177, the control unit operates the pump 170b to supply about 20% to 10% of water to the inside of the tube 179, thereby expanding the tube 179.

At this time, when the control unit receives a signal from the measurement unit 177, it can be programmed to transmit the abnormality of the support 160 to the manager's portable terminal and the manager PC.

When the tube 179 is expanded, the support plate 178 comes into close contact with the support 160 to support it.

The support plate 178 supports the support 160, and the tube 179 supports the support plate 178 at a constant weight, so even if a shock or earthquake is applied to the support 160, the support 160 can prevent it from flowing.

The amount of water filled in the tube 179 may vary depending on the size or weight of the outer spherical tank 10, the inner spherical tank 20, and the support 160.

Meanwhile, although not shown in the drawing, a warming unit (not shown) formed of a heating line or heating coil that operates by receiving power may be installed inside the housing 170a.

In addition, a temperature gauge (not shown) to measure temperature may be installed on the outer or inner surface of the housing 170a.

The temperature measuring device is a known product capable of measuring temperature and is configured to prevent the water filled inside the tube 179 from freezing when the temperature is low, such as in winter.

For this purpose, the temperature measuring device is electrically connected to the control unit described above.

The temperature gauge measures the temperature in real time and transmits it to the control unit.

The control unit receives the temperature in real time from the temperature measuring device, and if the temperature transmitted from the temperature measuring device is a preset temperature, for example, 0°C, which is the freezing temperature of ice, it applies power to the warming unit to control the temperature of the tube 179. It is programmed to prevent the water filled inside from freezing.

Additionally, the control unit can be programmed to cut off the power applied to the warming unit when the temperature transmitted from the temperature measuring device is 1°C or higher.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the scope of the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. must be interpreted.

10: External spherical tank 20: Internal spherical tank
30: support portion 31: first support region
32: second support member 33: fixture
40: insulation material 50: thermal insulation part
160: Support 170: Reinforcement part
171: Accommodating box 172: Corrugated support
173: first wrapping unit 1731: first member
1731a: first fastening hole 1732: second member
1732a: 2nd fastening hole 174: 2nd wrapping part
1741: Third member 1741a: Third fastening hole
1742: Fourth member 1742a: Fourth fastening hole
175: flow suppression part 176: metal weight part
177: measuring part 178: support plate
179: tube

Claims (5)

External spherical tank;
an inner spherical tank accommodated in the inner space of the outer spherical tank, the outer surface of which is spaced apart from the inner surface of the outer spherical tank, and a storage space formed therein; and
A liquefied hydrogen tank comprising a support portion that generates a holding force while connecting the inner surface of the outer spherical tank and the outer surface of the inner spherical tank.
According to paragraph 1,
The support part,
first and second supports coupled to the inner surface of the outer spherical tank and the outer surface of the inner spherical tank so as to be positioned diagonally to each other; and
A liquefied hydrogen tank including a fixture on one side and the other side fixed to the first support member and the second support member, respectively, to secure the inner spherical tank.
According to paragraph 2,
The first and second supports are applied in plural numbers and are coupled to the inner surface of the outer spherical tank and the outer surface of the inner spherical tank to be spaced apart from each other,
At least two fixtures are coupled to one first support, wherein the upper side of the fixture is jointly fixed to one selected first support, and the lower side is jointly fixed to different second supports. Liquefied hydrogen tank.
According to paragraph 1,
An insulation material installed on the outer surface of the inner spherical tank in a section where the support portion is not installed; and
It is filled in the space between the external spherical tank and the insulation material, and further includes at least one of a heat insulating part made of perlite material,
A liquefied hydrogen tank that fills the insulation part while sucking air from the space between the external spherical tank and the insulation material to create a vacuum in the space between the external spherical tank and the insulation material.
According to paragraph 1,
A plurality of supports supporting the external spherical tank at a certain distance from the ground and arranged at a certain distance from each other; and
It further includes a reinforcing part that protects the support from the load of the external spherical tank and the internal spherical tank transmitted to the lower part of the support,
The reinforcement part,
Accommodating boxes formed with accommodating spaces for accommodating lower sides of the supports, respectively;
Each is accommodated in the receiving space of the receiving box, and is disposed on the front, rear, left, and right sides of the support to prevent the support from shaking in the front, rear, left, and right directions, and the upper and lower sides are aligned with the support and the receiving box. Each of the waveform supports is coupled to an inclined structure and is formed in a waveform shape to cushion and support the support;
A first member is in contact with the left side of the support, a first fastening hole is formed, and both ends of the first member are bent in a right angle direction to contact 1/2 areas of the front and rear sides of the support, and a second fastening member is in contact with the left side of the support. a first wrapping portion including a second member in which a hole is formed;
A third member is in contact with the right side of the support, is bent at a right angle at both ends of the third member and is in contact with the remaining 1/2 area of the front and back sides of the support, and a fourth fastener is in contact with the right side of the support. a second wrapping portion including a fourth member in which a hole is formed;
A flow suppressor that penetrates from the outside of the box in the direction of the receiving space and is respectively fastened to the first fastening hole, the second fastening hole, the third fastening hole, and the fourth fastening hole, the end of which pressurizes and secures the support. ;
A box-shaped metal weight part formed of a metal material, and a receiving space in which the box part is accommodated is formed therein;
a measuring unit arranged to face the front, rear, left side, and right side of the support, respectively, to measure the distance from the support;
a support plate disposed to face the front, rear, left, and right sides of the support, respectively;
Tubes disposed on the front, rear, left, and right sides of the support, respectively, and to which the support plate is coupled to one side, respectively;
Housings that accommodate each of the tubes and are fixed to an upper surface of the metal weight portion; and
When the distance to the support measured by the measuring unit becomes shorter than the preset distance, a liquefied hydrogen tank including a pump that supplies water to the inside of the tube to expand the tube, thereby allowing the support plate to support the support.

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