CN214119668U

CN214119668U - Double-layer low-temperature liquid hydrogen spherical tank equipment

Info

Publication number: CN214119668U
Application number: CN202022791413.XU
Authority: CN
Inventors: 王凯; 谭万将; 王朝; 严岩; 倪中华; 陈晓晶; 陈甲楠; 任改红; 马小红
Original assignee: Jiangsu Guofu Hydrogen Energy Technology Equipment Co Ltd; Zhangjiagang Hydrogen Cloud New Energy Research Institute Co Ltd
Current assignee: Jiangsu Guofu Hydrogen Energy Technology Equipment Co Ltd; Zhangjiagang Hydrogen Cloud New Energy Research Institute Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-09-03
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a double-deck low temperature liquid hydrogen spherical tank equipment, include: the lower end of a central shaft tube with a liquid level meter sequentially penetrates through the top connecting port of the outer container, the top connecting port of the inner container, the bottom connecting port of the inner container and the bottom connecting port of the outer container in a sealing manner and then extends out of the outer container; an inner rotary ladder which rotates spirally is arranged on a central shaft tube in a cavity of the inner container, a fixed seat group is fixedly arranged in the middle of the inner wall of the outer container along the horizontal circumferential direction of the inner wall, at least four arc-shaped vertical ladders are arranged at the lower half part of the vacuum interlayer, the lower end of each arc-shaped vertical ladder is fixedly connected to the lower section of the central shaft tube, and the upper end of each arc-shaped vertical ladder is fixedly connected to the fixed seat group; at least two external rotary ladders are arranged at the upper half part of the vacuum interlayer, and the upper end of each external rotary ladder is fixedly connected to the upper section of the middle shaft tube, and the lower end of each external rotary ladder is fixedly connected to the fixing seat group. The structure can facilitate the manufacturing and the detection of the spherical tank and improve the stability of the integral structure of the spherical tank.

Description

Double-layer low-temperature liquid hydrogen spherical tank equipment

Technical Field

The utility model relates to a liquid hydrogen storage tank technical field especially relates to a double-deck low temperature liquid hydrogen spherical tank equipment.

Background

Although the liquefaction of hydrogen is a mature technology, the liquefaction cost of hydrogen is increased and the storage and transportation of liquid hydrogen are difficult due to the special physical properties of hydrogen, such as joule-thomson transition temperature, low boiling point (20.4K), exothermic liquid n-sec spontaneous conversion, and the like.

The liquid hydrogen storage tank mainly comprises a spherical storage tank (also called a spherical tank) and a cylindrical storage tank, and compared with the cylindrical storage tank, the spherical storage tank has the smallest surface area under the same volume and the same pressure, so that the steel area required by the spherical tank is small; under the condition of the same diameter, the internal stress of the spherical tank wall is minimum and uniform, so that the bearing capacity of the spherical tank is twice as large as that of the cylindrical storage tank, and the thickness of the spherical tank is only half of the thickness of the wall plate of the corresponding cylindrical storage tank. At present, most of domestic single-wall spherical tanks are single-wall spherical tanks, the technology of double-layer spherical tanks is not mature, and the structure of the double-layer spherical tanks is still in an exploration stage.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that needs to solve is: the double-layer low-temperature liquid hydrogen spherical tank equipment is convenient to manufacture and detect the spherical tank and can improve the stability of the overall structure of the spherical tank.

In order to solve the above problem, the utility model adopts the following technical scheme: the double-layer low-temperature liquid hydrogen spherical tank equipment comprises: the spherical outer container with the cavity and the spherical inner container with the cavity are arranged in the cavity of the outer container in a suspended mode, and a vacuum interlayer is formed between the outer wall of the inner container and the inner wall of the outer container; the lower end of a central shaft tube with a liquid level meter sequentially penetrates through the top connecting port of the outer container, the top connecting port of the inner container, the bottom connecting port of the inner container and the bottom connecting port of the outer container in a sealing manner and then extends out of the outer container, and the axis of the central shaft tube is overlapped with the vertical central line of the inner container; an inner rotary ladder is arranged on the central shaft tube in the cavity of the inner container, the inner rotary ladder is not contacted with the inner container, the lower end of the inner rotary ladder is fixedly connected with the lower section of the central shaft tube, the upper end of the inner rotary ladder is fixedly connected with the upper section of the central shaft tube, and the inner rotary ladder rotates at least 360 degrees from the lower end to the upper end in a spiral line shape; a fixing seat group is fixedly arranged on the middle position of the inner wall of the outer container and around the horizontal circumference direction of the inner wall, at least four arc-shaped vertical ladders which are not contacted with the inner container and the outer container are arranged on the lower half part of the vacuum interlayer, the lower end of each arc-shaped vertical ladder is fixedly connected to the lower section of the middle shaft tube, the upper end of each arc-shaped vertical ladder is fixedly connected to the fixing seat group, the radian projection direction of each arc-shaped vertical ladder faces the outer container, and each arc-shaped vertical ladder is rotationally and symmetrically distributed relative to the axis of the middle shaft tube; the upper half part of the vacuum interlayer is provided with N (N is more than or equal to 2) external rotary ladders which are not contacted with the inner container and the outer container, the upper end of each external rotary ladder is fixedly connected with the upper section of the middle shaft tube, the lower end of each external rotary ladder is fixedly connected on the fixed seat group, each external rotary ladder is upwards rotated from the lower end to the total rotation angle beta of the upper end is less than or equal to (360 degrees/N), and each external rotary ladder is rotationally and symmetrically distributed relative to the axis of the middle shaft tube.

Further, in the double-layer low-temperature liquid hydrogen spherical tank device, a pair of top thermometers for measuring the temperature of the top area of the inner cavity of the inner container is arranged at the top of the inner container, a pair of bottom thermometers for measuring the temperature of the bottom area of the inner cavity of the inner container is arranged at the bottom of the inner container, and signal lines of the top thermometers and the bottom thermometers are connected to instrument communication interfaces on the side wall of the outer container; a plurality of pairs of internal thermometers are arranged on the central shaft tube in the cavity of the inner container at intervals from top to bottom, and signal wires of the internal thermometers extend out of the top of the central shaft tube after penetrating through the central shaft tube.

Further, according to the double-layer low-temperature liquid hydrogen spherical tank equipment, a circular truncated cone-shaped supporting seat is fixedly arranged on the inner wall of the inner container at the connecting port at the bottom of the inner container, the diameter of the upper end of the circular truncated cone-shaped supporting seat is smaller than that of the lower end of the circular truncated cone-shaped supporting seat, and the central shaft tube is hermetically inserted into the central through hole of the circular truncated cone-shaped supporting seat.

Further, in the double-layer low-temperature liquid hydrogen spherical tank device, an adsorber for adsorbing gas in the vacuum interlayer is fixedly arranged on the outer wall of the inner container.

Further, aforementioned double-deck low temperature liquid hydrogen spherical tank equipment, wherein, be provided with the buffer connection portion between central siphon and outer container bottom connector, the concrete structure of buffer connection portion be: the connecting pipe of double-barrelled structure embolias from the central siphon bottom, the connecting pipe bottom is connected the fixed part through down and is sealed fixed in on the central siphon bottom outer wall, and form the cavity intermediate layer between connecting pipe inner wall and the central siphon outer wall, the cover is equipped with the bellows on the connecting pipe, the bellows top is connected the fixed part through last and is sealed fixed in on the connecting pipe outer wall, bellows bottom is through outer sealed fixed connection of container connecting portion on outer container bottom connector, and leave the clearance between bellows inner wall and the connecting pipe outer wall.

Further, in the double-layer low-temperature liquid hydrogen spherical tank device, the central shaft tube has a double-tube structure formed by the inner tube and the outer tube.

The utility model has the advantages that: the arrangement of the internal rotary ladders not only can facilitate the manufacture and the maintenance of the inner container and improve the stability of the overall structure of the spherical tank, but also can realize the uniform conduction of the temperature in the inner cavity of the inner container and avoid the conditions of local overheating and the like; in addition, the internal rotating ladder structure which rotates in a spiral line shape is particularly suitable for being used in a spherical tank with large capacity (the volume is 3000-10000 cubic meters); the arrangement of each external rotary ladder and each arc-shaped straight ladder not only facilitates the manufacturing and the maintenance of the spherical tank, but also improves the stability of the whole structure of the spherical tank; the buffer connecting part is arranged, and deformation of the large container caused by normal temperature to low temperature can be buffered through deformation of the corrugated pipe, so that the safety and stability service performance of the double-layer liquid hydrogen spherical tank are improved.

Drawings

Fig. 1 is a schematic structural diagram of the double-layer low-temperature liquid hydrogen spherical tank device of the present invention.

Fig. 2 is a schematic structural view of the buffer connecting portion.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and preferred embodiments.

Example one

As shown in fig. 1, the utility model discloses a double-deck low temperature liquid hydrogen spherical tank equipment, include: the vacuum insulation device comprises a spherical outer container 1 with a cavity and a spherical inner container 2 with a cavity, wherein the inner container 2 is arranged in the cavity of the outer container 1 in a suspended mode, and a vacuum interlayer 10 is formed between the outer wall of the inner container 2 and the inner wall 13 of the outer container 1. The structure in which the inner container 2 is suspended in the cavity of the outer container 1 generally employs a support structure, namely: the inner container 2 and the outer container 1 are provided with sets of support structures for supporting the inner container 2 and the outer container 1 together. The lower end of the central shaft tube 5 with the liquid level meter sequentially penetrates through the outer container top connecting port 11, the inner container top connecting port 21, the inner container bottom connecting port 22 and the outer container bottom connecting port 12 in a sealing mode and then extends out of the outer container 1, and the axis of the central shaft tube 5 is overlapped with the vertical center line of the inner container 2.

As shown in fig. 1, an inner rotary ladder 3 is provided on a middle shaft tube 5 positioned in a cavity of an inner container 2, the inner rotary ladder 3 is not in direct contact with the inner container 2, a lower end of the inner rotary ladder 3 is fixedly connected to a lower section of the middle shaft tube 5, an upper end of the inner rotary ladder 3 is fixedly connected to an upper section of the middle shaft tube 5, and the inner rotary ladder 3 is spirally rotated at least 360 ° from the lower end to the upper end. The inner rotary ladders 3 are not in direct contact with the inner wall of the inner container 2, so that the amount of heat leakage can be greatly reduced. The setting of this structure can make things convenient for the manufacturing and the maintenance of inner container 2 to and improve spherical tank overall structure's steadiness, can realize the even conduction of inner container inner chamber intermediate temperature again, avoid appearing the condition such as local zone overheat. In addition, the internal rotating ladder structure which rotates in a spiral shape is particularly suitable for being used in a spherical tank with large capacity (the volume is 3000-10000 cubic meters).

A fixed seat group 6 is fixedly arranged on the middle position of the inner wall of the outer container 1 and around the horizontal circumference direction of the inner wall, at least four arc-shaped vertical ladders 61 which are not directly contacted with the inner container 2 and the outer container 1 are arranged on the lower half part of the vacuum interlayer 10, the lower end of each arc-shaped vertical ladder 61 is fixedly connected with the lower section of the central shaft tube 5, the upper end of each arc-shaped vertical ladder 61 is fixedly connected on the fixed seat group 6, the radian projection direction of each arc-shaped vertical ladder 61 faces the outer container 1, and each arc-shaped vertical ladder 61 is rotationally and symmetrically distributed relative to the axis of the central shaft tube 5. The upper half part of the vacuum interlayer 10 is provided with N (N is more than or equal to 2) external rotary ladders 62 which are not contacted with the inner container 2 and the outer container 1, the upper end of each external rotary ladder 62 is fixedly connected with the upper section of the central axis tube 5, the lower end of each external rotary ladder 62 is fixedly connected with the fixed seat group 6, each external rotary ladder 62 rotates upwards from the lower end to the total rotation angle beta of the upper end is less than or equal to (360 degrees/N), and each external rotary ladder 62 is rotationally and symmetrically distributed relative to the axis of the central axis tube 5. The fixing seat group 6 may be a fixing seat support structure that surrounds the inner wall of the outer container 1 by one circle in the horizontal circumferential direction, or may be composed of a plurality of fixing seats arranged at intervals, and each fixing seat is sequentially arranged at intervals by one circle in the horizontal circumferential direction of the inner wall of the outer container 1. The outer rotary steps 62 and the arcuate straight steps 61 are not in direct contact with the inner wall of the outer container 1 and the outer wall of the inner container 2, and thus the amount of heat leakage can be greatly reduced. In addition, the setting of this structure can make things convenient for the manufacturing and the maintenance of spherical tank, can improve spherical tank overall structure's steadiness again.

In order to improve the connection stability of the central shaft tube 5 and further improve the stability of the whole spherical tank overall structure, as shown in fig. 1, in this embodiment, a circular truncated cone-shaped supporting seat 51 is fixedly arranged on the inner wall of the inner container 2 at the inner container bottom connecting port 22, the upper end diameter of the circular truncated cone-shaped supporting seat 51 is smaller than the lower end diameter of the circular truncated cone-shaped supporting seat 51, and the central shaft tube 5 is hermetically inserted into a central through hole of the circular truncated cone-shaped supporting seat 51. The arrangement of the circular truncated cone-shaped supporting seat 51 can further reduce the probability of leakage at the bottom connecting port 22 of the inner container.

As shown in fig. 1, in the present embodiment, a pair of top thermometers 41 for measuring the temperature of the top area of the inner cavity of the inner container 2 are provided at the top of the inner container 2, a pair of bottom thermometers 42 for measuring the temperature of the bottom area of the inner cavity of the inner container 2 are provided at the bottom of the inner container 2, and the signal lines of each top thermometer 41 and each bottom thermometer 42 are connected to the meter communication interface 4 on the side wall of the outer container 1; a plurality of pairs of internal thermometers 43 are arranged on the central axis tube 5 in the cavity of the inner container 2 at intervals from top to bottom, and the signal wires of the internal thermometers 43 extend out of the top of the central axis tube 5 after penetrating through the central axis tube 5. A pair of internal thermometers 43 is respectively arranged in each area of the central tube 5 from top to bottom, and the temperature of the same area is detected through the pair of internal thermometers 43, so that the accuracy of temperature detection of the area can be improved. In addition, when one of the internal thermometers 43 in a certain zone fails to detect the temperature, the other internal thermometer 43 in the zone which is normally working can still detect the temperature of the zone.

Since hydrogen molecules are very small and the movement speed is high, in the process of the container being stored for a very long time, along with the continuous movement of the hydrogen molecules, a small amount of hydrogen gas can move to the vacuum interlayer 10, which affects the vacuum degree of the container and causes the evaporation of the container to increase, and in order to ensure the vacuum degree of the vacuum interlayer 10, as shown in fig. 1, in the present embodiment, an adsorber 23 for adsorbing the gas in the vacuum interlayer 10 is fixedly arranged on the outer wall of the inner container 2.

Example two

The present embodiment is further designed based on the first embodiment.

As shown in fig. 2, in the present embodiment, a buffer connection portion is provided between the bottom connection port 12 of the outer container and the bottom shaft tube 5, and the buffer connection portion has a specific structure: the connecting pipe 82 of double-barrelled structure embolias from the bottom of central siphon 5, connecting pipe 82 bottom is connected fixed portion 81 through down and is sealed fixed in on the outer wall of central siphon 5 bottom, and form cavity intermediate layer 80 between the inner wall of connecting pipe 82 and the outer wall of central siphon 5, the cover is equipped with bellows 84 on connecting pipe 82, the top of bellows 84 is connected fixed portion 83 through last and is sealed on the outer wall of connecting pipe 82, the bottom of bellows 84 is passed through outer container connecting portion 85 sealed fixed connection in outer container bottom connector 12, and leave the clearance between the inner wall of bellows 84 and the outer wall of connecting pipe 82. The deformation of the corrugated pipe 84 can buffer the deformation of the large container caused by normal temperature to low temperature, and the safety and stability of the spherical tank can be improved.

In this embodiment, the bottom bracket tube 5 is a double tube structure composed of an inner tube 52 and an outer tube 53.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent changes made in accordance with the technical spirit of the present invention are also within the scope of the present invention.

Claims

1. Double-deck low temperature liquid hydrogen spherical tank equipment includes: the spherical outer container with the cavity and the spherical inner container with the cavity are arranged in the cavity of the outer container in a suspended mode, and a vacuum interlayer is formed between the outer wall of the inner container and the inner wall of the outer container; the method is characterized in that: the lower end of a central shaft tube with a liquid level meter sequentially penetrates through the top connecting port of the outer container, the top connecting port of the inner container, the bottom connecting port of the inner container and the bottom connecting port of the outer container in a sealing manner and then extends out of the outer container, and the axis of the central shaft tube is overlapped with the vertical central line of the inner container; an inner rotary ladder is arranged on the central shaft tube in the cavity of the inner container, the inner rotary ladder is not contacted with the inner container, the lower end of the inner rotary ladder is fixedly connected with the lower section of the central shaft tube, the upper end of the inner rotary ladder is fixedly connected with the upper section of the central shaft tube, and the inner rotary ladder rotates at least 360 degrees from the lower end to the upper end in a spiral line shape; a fixing seat group is fixedly arranged on the middle position of the inner wall of the outer container and around the horizontal circumference direction of the inner wall, at least four arc-shaped vertical ladders which are not contacted with the inner container and the outer container are arranged on the lower half part of the vacuum interlayer, the lower end of each arc-shaped vertical ladder is fixedly connected to the lower section of the middle shaft tube, the upper end of each arc-shaped vertical ladder is fixedly connected to the fixing seat group, the radian projection direction of each arc-shaped vertical ladder faces the outer container, and each arc-shaped vertical ladder is rotationally and symmetrically distributed relative to the axis of the middle shaft tube; the upper half part of the vacuum interlayer is provided with N external rotary ladders which are not in contact with the inner container and the outer container, N is more than or equal to 2, the upper end of each external rotary ladder is fixedly connected to the upper section of the middle shaft tube, the lower end of each external rotary ladder is fixedly connected to the fixed seat group, each external rotary ladder rotates upwards from the lower end to the total rotation angle beta of the upper end is less than or equal to (360 degrees/N), and each external rotary ladder is rotationally and symmetrically distributed relative to the axis of the middle shaft tube.

2. The double-layer cryogenic liquid hydrogen spherical tank device of claim 1, wherein: a pair of top thermometers for measuring the temperature of the top area of the inner cavity of the inner container is arranged at the top of the inner container, a pair of bottom thermometers for measuring the temperature of the bottom area of the inner cavity of the inner container is arranged at the bottom of the inner container, and signal wires of the top thermometers and the bottom thermometers are connected to an instrument communication interface on the side wall of the outer container; a plurality of pairs of internal thermometers are arranged on the central shaft tube in the cavity of the inner container at intervals from top to bottom, and signal wires of the internal thermometers extend out of the top of the central shaft tube after penetrating through the central shaft tube.

3. The double-layer cryogenic liquid hydrogen spherical tank device of claim 1, wherein: the inner wall of the inner container at the connecting port at the bottom of the inner container is fixedly provided with a circular truncated cone-shaped supporting seat, the diameter of the upper end of the circular truncated cone-shaped supporting seat is smaller than that of the lower end of the circular truncated cone-shaped supporting seat, and the central shaft tube is hermetically inserted in a central through hole of the circular truncated cone-shaped supporting seat in a penetrating manner.

4. The dual-layer cryogenic liquid hydrogen spherical tank apparatus of claim 1, 2 or 3, wherein: an adsorber for adsorbing gas in the vacuum interlayer is fixedly arranged on the outer wall of the inner container.

5. The double-layer cryogenic liquid hydrogen spherical tank device of claim 1, wherein: be provided with buffering connecting portion between central siphon and outer container bottom connector, buffering connecting portion's concrete structure do: the connecting pipe of double-barrelled structure embolias from the central siphon bottom, the connecting pipe bottom is connected the fixed part through down and is sealed fixed in on the central siphon bottom outer wall, and form the cavity intermediate layer between connecting pipe inner wall and the central siphon outer wall, the cover is equipped with the bellows on the connecting pipe, the bellows top is connected the fixed part through last and is sealed fixed in on the connecting pipe outer wall, bellows bottom is through outer sealed fixed connection of container connecting portion on outer container bottom connector, and leave the clearance between bellows inner wall and the connecting pipe outer wall.

6. The double-layer cryogenic liquid hydrogen spherical tank apparatus of claim 1 or 5, wherein: the central shaft tube is a double-tube structure consisting of an inner tube and an outer tube.