Hydrogen spherical tank and gas intake / outflow device therefor

Abstract

The present disclosure provides a hydrogen spherical tank and a gas intake / outflow device therefor. The gas intake / outflow device comprises a flange cover (2), a connecting protruding ring (3), and at least one pipe connecting structure (4). The flange cover (2) is arranged on a top manhole (140) of a spherical tank housing (1). The outer circumference of the connecting protruding ring (3) is sealedly arranged on the inner circumference of a mounting through hole (2), and the connecting protruding ring (3) is arranged corresponding to the mounting through hole (2). The outer circumference of the axial end of the pipe connecting structure (4) is connected to the inner circumference of the connecting protruding ring (3), so that the pipe connecting structure (4) is fixed to the flange cover (2) by means of the connecting protruding ring (3). The other end of the pipe connecting structure (4) extends out of the flange cover (2) in a direction facing away from the spherical tank housing (1). The pipe connecting structure (4) is centrally placed on the flange cover (2) of the manhole, and the interior of the pipe connecting structure (4) is communicated with an inner cavity of the spherical tank housing (1) by means of the flange cover (2), so that the flow path of a medium inside the spherical tank housing (1) is optimized, and the number of openings and seams on the spherical tank housing (1) is reduced, thereby reducing the connection stress between the pipe connecting structure (4) and the flange cover (2), and thus improving the safety and structural integrity of the spherical tank, and reducing the risk of leakage.

Description

Hydrogen spherical tank and gas inlet and outlet device thereof

[0001] The present disclosure claims priority to Chinese Patent Application No. 202411343644.0, filed on September 25, 2024, Chinese Patent Application No. 2024223615692, filed on September 25, 2024, and Chinese Patent Application No. 202411343647.4, filed on September 25, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the field of spherical tanks, in particular to a hydrogen spherical tank and a gas inlet and outlet device thereof. BACKGROUND

[0003] Spherical tanks are widely used for storing and transporting gases. In existing hydrogen spherical tank designs, high pressure and fatigue conditions often exist simultaneously, so quenched and tempered high-strength steel is often used as the pressure-bearing spherical tank shell main material. Conventional spherical tanks generally disperse the pipes for gas inlet and outlet in various parts of the spherical shell. However, if openings are dispersed on the pressure-bearing shell of the spherical tank, not only is it not conducive to smooth gas flow, thereby reducing gas flow efficiency, but also in order to ensure the material compatibility of the pipe and the spherical tank shell during welding, the pipe needs to be made of quenched and tempered high-carbon steel of the same type as the spherical tank shell, increasing the complexity of the welding process, and stress concentration is likely to occur at multiple welds, causing structural shape mutations and increasing the risk of gas leakage. SUMMARY

[0004] The present disclosure provides a hydrogen spherical tank and a gas inlet and outlet device thereof that reduces the openings in the spherical tank shell of the hydrogen spherical tank, simplifies the welding process, and reduces structural mutations in the spherical tank shell.

[0005] Some embodiments of the present disclosure provide a gas inlet and outlet device for a hydrogen spherical tank, which includes a flange cover arranged on a top manhole of a spherical tank shell, at least one mounting through hole is provided on the flange cover; a connecting convex ring is arranged on the inner periphery of the mounting through hole; at least one pipe structure is arranged corresponding to the connecting convex ring, the pipe structure is internally connected, and the outer periphery of one end of the pipe structure is connected to the inner periphery of the connecting convex ring, so that the pipe structure is fixed on the flange cover through the connecting convex ring; the other end of the pipe structure extends upward out of the flange cover.

[0006] Some other embodiments of the present disclosure also provide a hydrogen spherical tank, comprising an inlet and outlet gas device of the hydrogen spherical tank, further comprising: a spherical tank shell, a top manhole is arranged on the top of the spherical tank shell, a flange cover is arranged on the top manhole and can close the top manhole, and the inlet and outlet gas device of the hydrogen spherical tank is arranged at the top manhole.

[0007] The above technical solution places the connecting pipe structure on the flange cover on the manhole on the top of the spherical tank shell, and the inside of the connecting pipe structure is communicated with the inner cavity of the spherical tank shell through the flange cover, which not only optimizes the flow path of the medium in the spherical tank shell, reduces the number of openings and seams on the spherical tank shell, and wherein the outer periphery of the connecting pipe structure is provided with a connecting convex ring, and the outer peripheral wall of the connecting convex ring is correspondingly and sealingly arranged on the inner peripheral wall of the mounting through hole, so that the connecting pipe structure can be connected with the flange cover through the connecting convex ring, which not only improves the mounting strength of the connecting pipe structure, but also reduces the connecting stress between the connecting pipe structure and the flange cover, significantly improves the safety and structural integrity of the spherical tank, reduces the risk of leakage, improves the manufacturing efficiency and safety, and facilitates the connection and fixation of the connecting pipe structure and the flange cover, and improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0008] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0009] Fig. 1 is a schematic diagram of the composition of a spherical tank according to an embodiment of the present disclosure;

[0010] Fig. 2 is a partial cross-sectional view of the connection position between the connecting pipe structure, the connecting convex ring and the flange cover according to an embodiment of the present disclosure;

[0011] Fig. 3 is a partial enlarged view of the cross-sectional view of the flange cover along the mounting through hole according to an embodiment of the present disclosure;

[0012] Fig. 4 is a half cross-sectional view of the connection between the connecting convex ring and the connecting pipe structure according to an embodiment of the present disclosure;

[0013] Fig. 5 is a schematic diagram of the sealing connection structure between the connecting convex ring and the flange cover according to an embodiment of the present disclosure;

[0014] Fig. 6 is a distribution diagram of multiple connecting pipe structures on the flange cover according to an embodiment of the present disclosure;

[0015] Fig. 7 is a schematic diagram of the structure of a high-pressure gas storage container according to an embodiment of the present disclosure;

[0016] Fig. 8 is a schematic diagram of the structure of a skirt assembly of the high-pressure gas storage container shown in Fig. 7;

[0017] Fig. 9 is a top view of a skirt bottom plate of the skirt assembly shown in Fig. 8.

[0018] The reference signs are explained as follows: 1 - spherical tank shell, 110 - sub-shell, 120 - bottom manhole, 130 - medium inlet and outlet; 140 - top manhole; 150 - connecting assembly; 151 - connecting pipe body; 160 - skirt assembly; 161 - skirt cylinder; 162 - access hole; 163 - perforation; 164 - notch; 165 - through hole; 166 - support pipe; 167 - skirt bottom plate; 168 - connecting hole;

[0019] 2 - flange cover, 21 - mounting through hole, 211 - second inner inclined surface, 212 - second transition surface, 213 - second outer inclined surface, 22 - cylinder, 23 - cover body, 24 - handle, 25 - sealing ring, 26 - welding gap, a - first included angle, b - second included angle, 3 - connecting convex ring, 31 - first inner inclined surface, 32 - first transition surface, 33 - first outer inclined surface, 34 - inclined surface, 4 - connecting pipe structure, 41 - connecting flange. DETAILED DESCRIPTION

[0020] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art.

[0021] In the description of the present disclosure, all connection relationships mentioned are not single direct connections between components, but can be connected to form a more optimal connection structure by adding or reducing connection accessories according to specific implementation conditions. The various technical features in the present disclosure can be combined interactively without mutual contradiction and conflict.

[0022] In the description of the present disclosure, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be understood broadly, and those skilled in the art can reasonably determine the specific meaning of the above words in the present disclosure in combination with the specific content of the technical solutions.

[0023] In the description of the present disclosure, it needs to be understood that the position description, such as the position or location relationship indicated by up, down, front, back, left, right, etc. is based on the position or location relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present disclosure.

[0024] In the description of the present disclosure, several meanings are one or more, and multiple meanings are two or more. Greater than, less than, more than, etc. are understood as not including the number itself, and above, below, etc. are understood as including the number itself.

[0025] Hydrogen is gaseous at normal temperature and pressure, and its density is very small, only 1 / 14 of air. For a long time, efficient storage has been a bottleneck for large-scale commercialization of hydrogen energy technology, and hydrogen storage technology is a key technology and a difficult point. Hydrogen storage methods mainly include low-temperature liquid hydrogen storage, high-pressure gaseous hydrogen storage, solid material hydrogen storage and organic liquid hydrogen storage. Compared with other methods, high-pressure gaseous hydrogen storage technology is relatively mature, and is the most commonly used hydrogen storage technology in China at present.

[0026] In the prior art, the high-pressure hydrogen storage container commonly used is a small-diameter long-cylinder tank body structure, and the tank body form is generally a winding composite form. At present, the volume of the high-pressure hydrogen storage container is basically at the level of 300 cubic meters, which greatly limits the efficient promotion and application of hydrogen energy in the future. Foreign countries have completed the technical development and application of several thousand cubic meter level storage tanks, but they are mainly made of steel structure. Due to the limitation of the pressure in the tank, the steel material and thickness of the container have great limitations on the breakthrough of the tank capacity.

[0027] The present disclosure provides a hydrogen spherical tank gas inlet and outlet device, which adopts a flange cover 2 installed on the top manhole 140 of the spherical tank shell 1, reduces the number of openings and seams on the spherical tank shell 1, and improves the safety and structural integrity of the spherical tank.

[0028] Referring to FIG. 1, FIG. 2 and FIG. 3, FIG. 1 is a structure diagram of the spherical tank of the present disclosure, FIG. 2 is a partial sectional view of the connection position between the pipe structure 4, the connecting convex ring 3 and the flange cover 2 of the present disclosure, and FIG. 3 is a partial enlarged view of the sectional view of the flange cover 2 along the mounting through hole 21. The hydrogen spherical tank of the present disclosure includes a spherical tank shell 1 and a hydrogen spherical tank gas inlet and outlet device, wherein the hydrogen spherical tank gas inlet and outlet device includes a flange cover 2, a connecting convex ring 3 and at least one pipe structure 4. The top of the spherical tank shell 1 is provided with a manhole, the flange cover 2 is arranged on the manhole and can close the manhole, and the flange cover 2 is provided with at least one mounting through hole 21. At least one connecting convex ring 3 is arranged in one-to-one correspondence with the mounting through hole 21, and the outer periphery of the connecting convex ring 3 is sealingly arranged on the inner periphery of the mounting through hole 21. The pipe structure 4 is arranged in one-to-one correspondence with the connecting convex ring 3, the pipe structure 4 is internally connected, and the outer periphery of one end of the pipe structure 4 is connected to the inner periphery of the connecting convex ring 3, so that the pipe structure 4 is fixed to the flange cover 2 through the connecting convex ring 3; the other end of the pipe structure 4 extends out of the flange cover 2 in a direction away from the spherical tank shell 1.

[0029] Specifically, the inner cavity of the spherical tank shell 1 is in communication with the connecting pipe structure 4, thereby being capable of realizing input, output, discharge or serving as a safety valve port of the medium in the spherical tank shell 1. The connecting pipe structure 4 is placed on the manhole flange cover 2 in the present disclosure, so that the inner part of the connecting pipe structure 4 is in communication with the inner cavity of the spherical tank shell 1 through the manhole flange cover 2, and the input and output path of the medium is limited on the manhole flange cover 2, which not only optimizes the flow path of the medium in the spherical tank shell 1, but also reduces the number of openings and seams on the spherical tank shell 1. The outer periphery of the connecting pipe structure 4 is provided with a connecting convex ring 3, and the outer peripheral wall of the connecting convex ring 3 is correspondingly and sealingly arranged on the inner peripheral wall of the mounting through hole 21, so that the connecting pipe structure 4 can be connected with the manhole flange cover 2 through the connecting convex ring 3. The connecting convex ring 3 can be regarded as thickening the structure of the connecting pipe structure 4 corresponding to the connection of the manhole flange cover 2, which not only improves the mounting strength of the connecting pipe structure 4, but also reduces the connecting stress of the connecting pipe structure 4 and the manhole flange cover 2, significantly improves the safety and structural integrity of the spherical tank, reduces the risk of leakage, improves the manufacturing efficiency and safety, reduces the stress concentration caused by structural mutation, and better adapts the connecting pipe structure 4 to the metal fatigue caused by multiple pressure cycles of the spherical tank shell 1 in use, and facilitates the connection and fixation of the connecting pipe structure 4 and the manhole flange cover 2, thereby improving the production efficiency.

[0030] It should be noted that the present scheme does not directly weld the connecting pipe structure 4 on the spherical tank shell 1, and there is no need to select the same kind of quenched and tempered high-strength steel for the connecting pipe structure 4 and the spherical tank shell 1 in order to improve the material compatibility of the connecting pipe structure 4 and the spherical tank shell 1 in welding, so as to avoid the decline of the fatigue resistance of the connecting pipe structure 4. Therefore, the materials of the connecting pipe structure 4 and the spherical tank shell 1 can be different. The materials of the manhole flange cover 2 and the connecting pipe structure 4 can be selected as steel materials with stronger fatigue resistance, which not only ensures the integrity of the pressure-containing shell of the spherical tank, avoids the stress concentration caused by structural mutation, but also enables the connecting pipe structure 4 to overcome the metal fatigue caused by the spherical tank shell 1 and the reverse multiple pressure cycles.

[0031] The spherical tank of the present disclosure is applied to contain hydrogen, and the manhole is arranged at the top of the spherical tank shell 1, i.e. the top manhole 140, which is convenient for the flow of hydrogen in the gaseous state. In addition, corresponding to the case that the spherical tank is used to contain liquid medium, the manhole can also be arranged at the bottom of the spherical tank shell 1, i.e. the bottom manhole 120, which is convenient for the collection and output of the liquid medium. Considering that the high pressure and fatigue working conditions often exist simultaneously in the use of the spherical tank, in the specific implementation, the spherical tank shell 1 can be made of quenched and tempered high-strength steel with strong pressure-bearing capacity, and the materials of the connecting pipe structure 4 and the manhole flange cover 2 can be 20MnMoD.

[0032] Specifically in the embodiment, the flange cover 2 is arranged on the top manhole 140 of the spherical tank shell. Further, the mounting through hole 21 on the flange cover 2 can be provided with one, two or more mounting through holes 21. In the case of multiple mounting through holes 21, the mounting through holes 21 are circumferentially distributed at intervals around the center of the flange cover 2, facilitating the connection of the connecting convex ring 3. The number and position of the three of the connecting convex ring 3, the mounting through hole 21 and the flange cover 2 are one-to-one corresponding.

[0033] In combination with FIG. 2, the inner circumferential wall of the mounting through hole 21 protrudes inward in the circumferential direction, and the outer circumferential wall of the connecting convex ring 3 protrudes outward in the circumferential direction; the protruding part of the connecting convex ring 3 and the protruding part on the mounting through hole 21 are opposite to each other; the outer circumferential wall of the connecting convex ring 3 and the inner circumferential wall of the mounting through hole 21 together form an annular welding gap 26, and the connecting convex ring 3 is welded on the inner circumferential wall of the mounting through hole 21 along the welding gap 26.

[0034] Specifically, the inner circumferential wall of the mounting through hole 21 is arranged at intervals with the connecting convex ring 3, and the circumferential protrusions on the inner circumferential wall of the mounting through hole 21 and the circumferential protrusions of the connecting convex ring 3 are opposite to each other, so that the inner circumferential wall of the mounting through hole 21 and the outer circumferential wall of the connecting convex ring 3 form an annular welding gap 26, and the welding gap 26 is narrowed at the positions corresponding to the protrusions of the connecting convex ring 3 and the mounting through hole 21, facilitating the welding of the solder, so that the outer circumferential wall of the connecting convex ring 3 can be welded on the inner circumferential wall of the mounting through hole 21. The connecting convex ring 3 and the flange cover 2 in the present disclosure are connected by welding.

[0035] In the present disclosure, the inner circumferential wall of the mounting through hole 21 protrudes one turn in the direction close to the axis in the middle part of the axial direction, and the outer circumferential wall of the connecting convex ring 3 protrudes one turn in the direction away from the axis in the middle part of the axial direction, so that the two end openings of the welding gap 26 have a large distance, and the middle part is narrowed, facilitating the welding at the two end openings of the welding gap 26, and improving the welding effect. Moreover, the axial direction of the connecting convex ring 3, the axial direction of the mounting through hole 21 and the axial direction of the annular welding gap 26 coincide, so that the gap distance in the annular welding gap 26 is consistent. In fact, the axial directions of the connecting convex ring 3, the mounting through hole 21 and the welding gap 26 all pass through the inside of the spherical tank shell 1. In addition, the welding gap 26 formed between the outer circumferential wall of the connecting convex ring 3 and the inner circumferential wall of the mounting through hole 21 can also have a consistent distance. The protruding positions of the outer circumferential wall of the connecting convex ring 3 and the inner circumferential wall of the mounting through hole 21 are all located on the side close to the spherical tank shell 1 in the axial direction, i.e. the lower end of the outer circumferential wall of the connecting convex ring 3 and the lower end of the inner circumferential wall of the mounting through hole 21, or all located on the side away from the spherical tank shell 1 in the axial direction, i.e. the upper end of the outer circumferential wall of the connecting convex ring 3 and the upper end of the inner circumferential wall of the mounting through hole 21, so that the welding gap 26 forms a structure with one end narrowed in the axial direction.

[0036] As shown in FIG. 2, the flange cover 2 comprises a cylinder 22 and a cover 23, the cylinder 22 is sleeved on the manhole with one end open, and the cover 23 is detachably connected to the bottom edge of the cylinder 22, the cover 23 is configured to cover or open the other end of the cylinder 22, and the mounting hole 21 is arranged on the cover 23. The cylinder 22 is internally communicated, the axial ends of the cylinder 22 are respectively communicated with the internal communication of the mounting hole 21 and the inner cavity of the spherical tank shell 1, so that the mounting hole 21 on the cover 23 is opposite to the space surrounded by the cylinder 22, and the medium can pass in and out of the spherical tank shell 1 through the connecting pipe structure 4 on the mounting hole 21.

[0037] Further, one side of the cover 23 is rotationally connected to the cylinder 22, and the other side is connected to the cylinder 22 through bolts; the cover 23 is provided with a handle 24, and the mounting hole 21 is located between the handle 24 and the rotationally connected position of the cover 23. The worker can turn over the cover 23 through the handle 24 to realize the opening or covering of the cylinder 22, which is convenient for operation. Moreover, the sealing ring 25 is arranged at the position where the cylinder 22 and the cover 23 cover each other. The sealing performance between the cover 23 and the cylinder 22 is improved to avoid leakage of the gas medium. In some other embodiments, the cover 23 can also be circumferentially connected to the cylinder 22 through bolts, and the opening or closing of the cover 23 and the cylinder 22 can be realized by removing or installing the bolts.

[0038] Further, in combination with FIG. 3, the inner peripheral wall of the mounting hole 21 comprises a second inner inclined surface 211, a second transition surface 212 and a second outer inclined surface 213 which are sequentially connected in the axial direction and away from the spherical tank shell 1 upward. In combination with FIG. 4, the outer peripheral wall of the connecting convex ring 3 comprises a first inner inclined surface 31, a first transition surface 32 and a first outer inclined surface 33 which are sequentially connected in the axial direction and away from the spherical tank shell 1 upward. In combination with FIG. 5, the first inner inclined surface 31 and the second inner inclined surface 211 form a first included angle α, the first included angle α is upward toward the spherical tank shell 1; the first transition surface 32 and the second transition surface 212 are spaced apart and opposite to each other; the first outer inclined surface 33 and the second outer inclined surface 213 form a second included angle β, the second included angle β is downward away from the spherical tank shell 1.

[0039] Specifically, the first included angle a between the second inner inclined surface 211 and the first inner inclined surface 31 is upwardly directed toward the spherical tank shell 1, and the second included angle β between the second outer inclined surface 213 and the second outer inclined surface 213 is downwardly directed away from the spherical tank shell 1. The worker can weld at the positions corresponding to the first included angle a and the second included angle β of the welding gap 26. The existence of the first included angle a and the second included angle β can optimize the welding process, ensure the quality and strength of the welding position, and make the welding material more easily extend into the welding gap 26. In fact, the first included angle a is formed on one side of the axial end of the welding gap 26, and the second included angle β is formed on one side of the axial other end of the welding gap 26, so as to ensure that the connecting lug 3 can be circumferentially welded on the mounting through hole 21. In fact, the first inner inclined surface 31, the second inner inclined surface 211, the first transition surface 32, the second transition surface 212, the first outer inclined surface 33 and the second outer inclined surface 213 are all annular surface structures.

[0040] In the embodiment, the distance between the first transition surface 32 and the second transition surface 212 is 1mm-3mm; the angle of the first included angle a is 50°-55°; and the angle of the second included angle β is 45°-50°. Specifically, the first included angle a is set to be slightly larger than the second included angle β, so that the welding depth of the welding gap 26 at the end of the inner cavity of the spherical tank shell 1 is deeper, the welding degree is ensured, and the fixing effect between the connecting lug 3 and the flange cover 2 is improved. In addition, the distance between the first transition surface 32 and the second transition surface 212 is determined to be 1mm-3mm, so as to avoid causing virtual welding.

[0041] The connecting lug 3 is formed on the circumferential side of the pipe structure 4 close to the spherical tank shell 1. In the embodiment, the connecting lug 3 and the pipe structure 4 are formed by integral molding, and can be obtained by processes such as mold forming, machine tool cutting and milling. The connection strength and sealing performance between the connecting lug 3 part and the pipe structure 4 part are ensured, and the stress mutation between the connecting lug 3 and the pipe structure 4 is reduced. The connecting lug 3 thickens the structure of the pipe structure 4 corresponding to the connecting flange cover 2, improves the installation strength of the pipe structure 4, and reduces the connection stress between the pipe structure 4 and the flange cover 2. In addition, the connecting lug 3 and the pipe structure 4 can also be connected and fixed by welding and the like.

[0042] Referring to FIG. 5, the axial dimension of the connecting lug 3 matches the axial length of the mounting through hole 21; the side of the connecting lug 3 close to the spherical tank shell 1 along the axial direction and the port of the mounting through hole 21 close to the spherical tank shell 1 along the axial direction are flush with each other. The bottom of the integral section pipe and the surface of the manhole flange cover 2 realize internal and external flush butt joint, and are welded to ensure that the welding joint can smoothly transition in the welding gap 26, effectively reducing the fatigue damage and stress concentration phenomenon caused by pressure fluctuation.

[0043] And, the side of the connecting convex ring 3 close to the spherical tank shell 1 is flush with the end of the pipe structure 4 close to the spherical tank shell 1. The pipe structure 4 and the connecting convex ring 3 are flush with each other on the side close to the spherical tank shell 1, which is convenient for the flow of medium. Moreover, the connecting convex ring 3 and the pipe structure 4 can be integrally formed.

[0044] In the embodiment, the side of the connecting convex ring 3 away from the spherical tank shell 1 is an inclined surface 34, so that the axial dimension of the connecting convex ring 3 gradually increases in the radial direction close to the axis. Specifically, the axial thickness of the connecting convex ring 3 gradually increases in the radial direction close to the central axis of the connecting convex ring 3, which increases the connection area of the connecting convex ring 3 and the pipe structure 4, further improves the strength of the connection position between the connecting convex ring 3 and the pipe structure 4, reduces stress concentration and crack generation, and improves the fatigue resistance of the pipe structure 4. In addition, in the case of ignoring stress concentration, the back of the connecting convex ring 3 away from the spherical tank shell 1 can also be perpendicular to the outer peripheral wall of the pipe structure 4.

[0045] Further, the axial angle between the inclined surface 34 and the pipe structure 4 is 40°-50°. Further improve the strength of the connection position between the connecting convex ring 3 and the pipe structure 4.

[0046] In the embodiment, the position of the inclined surface 34 away from the spherical tank shell 1 is arc-shaped, and the arc-shaped part of the inclined surface 34 is tangent to the outer peripheral wall of the pipe structure 4. The inclined surface 34 connects with the outer peripheral wall of the pipe structure 4 through the arc surface, so that the stress distribution is more uniform, further reduces the deformation and cracking phenomenon caused by stress concentration between the connecting convex ring 3 and the pipe structure 4, and improves the strength of the connection position between the connecting convex ring 3 and the pipe structure 4. In fact, the inclined surface 34 can be a plane, an arc surface, or a combination of a plane and an arc surface, so that the connecting convex ring 3 is formed as a whole with a small outer peripheral axial thickness and a large axial thickness close to the axis.

[0047] In combination with FIG. 6, a plurality of mounting through holes 21 are provided, and the plurality of mounting through holes 21 are circumferentially distributed at intervals around the center of the cover body 23. The pipe structure 4 has a plurality of, and the pipe structure 4 is provided on the mounting through hole 21 through the connecting convex ring 3 one by one. In fact, the outer diameter of the pipe structure 4 can be determined by the function, and the size of the corresponding mounting through hole 21 and the connecting convex ring 3 is increased or decreased accordingly.

[0048] The end of the pipe structure 4 away from the spherical tank shell 1 is provided with a connecting flange 41, which can realize pipe connection through the connecting flange 41, and is convenient for connection.

[0049] Among them, the pipe structure 4 can be selected as one of the input medium, the output medium, the discharge, the safety valve port, etc. When the pipe structure 4 is not needed, the connecting flange 41 on the pipe structure 4 can be plugged by the flange cover.

[0050] It can be understood that the gas inlet and outlet device can be used on different forms of spherical tank shell 1, and the specific implementation form of the spherical tank shell 1 is not limited. Moreover, the gas inlet and outlet device is applied to a hydrogen spherical tank, and has a more prominent effect: since hydrogen gas is gasified in the spherical tank shell 1, a pipeline connected with the hydrogen spherical tank needs to bear a relatively large pressure, and the hydrogen spherical tank can reduce stress concentration and crack generation, improve the fatigue resistance of the connecting pipe structure 4, and improve the safety of the hydrogen spherical tank.

[0051] In an embodiment, the hydrogen spherical tank includes a spherical tank shell 1 and a skirt assembly 160 arranged at the bottom of the spherical tank shell 1. The spherical tank shell 1 is a vertically arranged tank structure, and the inside of the tank structure is used to store high-pressure hydrogen gas and other media.

[0052] As shown in FIG. 1, the spherical tank shell 1 includes a plurality of sub-shells 110, and the plurality of sub-shells 110 are connected in one body along the vertical direction. The inner cavities of the plurality of sub-shells 110 are communicated with each other and form a storage space for storing media. Each sub-shell 110 can be a large-volume spherical tank structure. Each sub-shell 110 can be made of low-alloy steel material or high-strength steel material. Preferably, the plurality of sub-shells 110 are coaxially arranged.

[0053] In the embodiment of the present disclosure, the high-pressure gas storage container includes a spherical tank shell 1, and the spherical tank shell 1 includes a plurality of sub-shells 110 connected in one body along the vertical direction. It should be noted that, compared with a traditional cylindrical storage tank, the surface area of the spherical storage tank is the smallest under the same volume and the same pressure, so the steel area required by each sub-shell 110 of the present disclosure is small; under the same diameter, the spherical storage tank is better than the cylindrical storage tank in stress, and has high mechanical strength and uniform stress distribution, so the carrying capacity of the sub-shell 110 of the present disclosure is twice as strong, and the wall thickness of the sub-shell 110 is only half of the wall thickness of the corresponding cylindrical storage tank.

[0054] Since each sub-shell 110 has better pressure resistance, the spherical tank shell 1 formed by the plurality of sub-shells 110 in series also has better pressure resistance. Therefore, the high-pressure gas storage container of the present disclosure can infinitely stack the sub-shells 110 upward to realize large-capacity storage, has higher storage capacity, can meet the demand for large-capacity tank capacity, does not need additional land area for upward stacking of each sub-shell 110, can greatly save land area, and does not need to increase the wall thickness of the tank body to improve the pressure resistance of the storage tank, can greatly save the use of materials, and has simpler manufacturing process and lower manufacturing cost.

[0055] In the present disclosure, each sub-shell 110 can be a single-wall tank structure. The wall thickness of each sub-shell 110 can be about 50 mm, so as to better control the quality and safety of the product.

[0056] The design pressure of a single sub-shell 110 can be ≥10MP. The number of sub-shells 110 stacked in the spherical tank shell 1 can be designed according to standard specifications, customer requirements, etc. and can be analyzed and calculated by finite element software. In theory, there is no upper limit to the number of stacked sub-shells 110.

[0057] In other embodiments, the sub-shell 110 can also be a double-layer tank structure. For example, each sub-shell 110 can include an inner tank and an outer tank, and the outer tank is wrapped around the outside of the inner tank and a sandwich space can be formed between the two. When the plurality of sub-shells 110 are connected to each other, the inner tanks of each sub-shell 110 are connected to each other and are in communication with each other to form a medium storage space. The outer tanks of each sub-shell 110 are connected to each other, and each sandwich space is in communication with each other.

[0058] It can be understood that the spherical tank shell 1 composed of single-wall sub-shells 110 can be suitable for storing high-pressure gas and other media, as long as the spherical tank shell 1 can meet the volume requirement, pressure requirement and standard specification design. The spherical tank shell 1 composed of double-layer sub-shells 110 can be suitable for storing low-temperature liquids and other media with special storage requirements, meeting the storage requirements of different media.

[0059] Referring to FIG. 1, the bottom of the spherical tank shell 1 is provided with a bottom manhole 120. The bottom manhole 120 is used for personnel to pass through to perform maintenance and other operations on the spherical tank shell 1. The bottom manhole 120 can be circular, rectangular, oval or other regular shapes, or other irregular shapes. The shape of the bottom manhole 120 is not specifically limited in the embodiments of the present disclosure, and can be changed according to actual application.

[0060] For example, the spherical tank shell 1 can be provided with a manhole flange at the bottom manhole 120, and the bottom end of the manhole flange is provided with a flange cover 2. The flange cover 2 can be reversibly connected to the manhole flange. Alternatively, the flange cover 2 can be detachably connected to the manhole flange. By providing the manhole flange and the flange cover 2 at the bottom manhole 120, the bottom manhole 120 can be easily opened or closed according to actual needs by the operator, and the structure is simple and convenient for use of the container.

[0061] Referring to FIG. 1, the bottom of the spherical tank shell 1 is provided with a medium inlet and outlet 130, and the medium inlet and outlet 130 is used to connect a medium inlet and outlet pipe. The medium inlet and outlet pipe can be a tubular structure made of low alloy steel or other materials. One end of the medium inlet and outlet pipe is in communication with the medium inlet and outlet 130 at the bottom of the spherical tank shell 1, and the other end can lead to an external gas storage device. It can be understood that necessary control valves can be provided at the medium inlet and outlet 130 at the bottom of the spherical tank shell 1 or on the medium inlet and outlet pipe to control the supplement of the medium into the container or the output of the medium from the container.

[0062] Referring to FIG. 1, in an embodiment, the top of the spherical tank shell 1 is provided with a top manhole 140. The top manhole 140 is used for personnel to pass through to perform maintenance and other operations on the spherical tank shell 1. The top manhole 140 can be circular, rectangular, oval or other regular shape, or other irregular shape. The shape of the top manhole 140 is not specifically limited in the embodiments of the present disclosure, and can be changed according to actual application.

[0063] Specifically, the spherical tank shell 1 can be provided with a manhole flange at the top manhole 140, and the top end of the manhole flange is provided with a flange cover 2. The flange cover 2 can be reversibly connected with the manhole flange. Alternatively, the flange cover 2 can be detachably connected with the manhole flange. By providing the manhole flange and the flange cover 2 at the top manhole 140, the operator can conveniently open or close the top manhole 140 according to actual needs, and the structure is simple and convenient for use of the container.

[0064] Further, the flange cover 2 of the top manhole 140 can also be installed with valve components (not shown in the figure). For example, the valve components can include safety valves and other necessary valve components, such as gas phase valves, etc. In addition, the flange cover 2 can be installed with necessary instruments such as pressure detectors. In the embodiment, the valve components and related instruments are integrated and installed on the flange cover 2 of the top manhole 140, which can facilitate the disassembly and maintenance of the valve components and instruments, and make the operation more convenient.

[0065] It should be noted that in the present disclosure, the top of the spherical tank shell 1 can specifically refer to the top of the uppermost sub-shell 110 among the plurality of connected sub-shells 110. The bottom of the spherical tank shell 1 can specifically refer to the bottom of the lowermost sub-shell 110 among the plurality of connected sub-shells 110.

[0066] In the embodiments of the present disclosure, the manhole, the medium inlet and outlet 130, the connecting pipe structure 4, the valve components and the instruments are respectively arranged at the bottom and the top of the spherical tank shell 1, and the tank body side wall of the middle part of the spherical tank shell 1 can not be additionally provided with each process port and instrument interface. Thus, the safety of the container can be better ensured by avoiding excessive opening of holes on each sub-shell 110 of the spherical tank shell 1.

[0067] Referring to FIG. 7, in an embodiment, the spherical tank shell 1 further includes a connecting assembly 150 arranged between two adjacent sub-shells 110. The connecting assembly 150 is used to fixedly connect the two adjacent sub-shells 110 and make the two adjacent sub-shells 110 communicate with each other. In the embodiment, the connecting assembly 150 can play a role of connecting and communicating the two adjacent sub-shells 110, and also play a role of reliably supporting the upper sub-shell 110.

[0068] Specifically, the connecting assembly 150 comprises a connecting pipe body 151, which is a hollow structure. Two ends of the connecting pipe body 151 are connected with two adjacent sub-shells 110 respectively. The connecting pipe body 151 can be made of low alloy steel material or high-strength steel material. The end of the connecting pipe body 151 and the sub-shell 110 can be fixedly connected by welding.

[0069] For example, a communication port with the same inner diameter as the end of the connecting pipe body 151 is formed on each of the two adjacent sub-shells 110. Through the communication port on the sub-shell 110 and the hollow connecting pipe body 151, the two adjacent sub-shells 110 are connected and communicated.

[0070] Further, the connecting assembly 150 further comprises a reinforcing member arranged on the outer periphery of the connecting pipe body 151, and the reinforcing member is connected with the two adjacent sub-shells 110 respectively. By arranging the reinforcing member, the load-carrying capacity and the rigidity of the connecting assembly 150 can be improved, and the connection strength between the two adjacent sub-shells 110 can be improved, thereby facilitating to enhance the structural stability of the spherical tank shell 1 and prolong the service life of the spherical tank shell 1.

[0071] The reinforcing member can comprise a plurality of reinforcing rib plates arranged on the outer periphery of the connecting pipe body 151, and the upper and lower sides of each reinforcing rib plate are connected with the two adjacent sub-shells 110 respectively.

[0072] Alternatively, in other embodiments, the reinforcing member can also have a sleeve structure, which can be sleeved on the outer periphery of the connecting pipe body 151, and the upper and lower ends of the sleeve structure are connected with the two adjacent sub-shells 110 respectively.

[0073] In the embodiments of the present disclosure, the two adjacent sub-shells 110 are connected and communicated with each other by the connecting pipe body 151. However, the present disclosure is not limited thereto, and in other embodiments, the connecting pipe body 151 can be omitted. For example, the two adjacent sub-shells 110 can be directly connected and communicated with each other. Specifically, the bottom opening of the upper sub-shell 110 and the top opening of the lower sub-shell 110 can be butted. In addition, a plurality of reinforcing connection portions can be arranged circumferentially at the connection between the upper sub-shell 110 and the lower sub-shell 110, so as to enhance the connection strength between the two adjacent sub-shells 110 and increase the overall structural strength of the spherical tank shell 1.

[0074] It can be understood that when each sub-shell 110 adopts a double-layer tank body structure, the connecting pipe body 151 can correspondingly adopt a double-layer pipe body structure.

[0075] Referring to FIGS. 7 and 8, the skirt assembly 160 is arranged at the bottom of the spherical tank shell 1 and is used to support the entire spherical tank shell 1. Specifically, the skirt assembly 160 includes a skirt cylinder 161, the top end of which is fixedly connected to the bottom of the spherical tank shell 1. The skirt cylinder 161 can be a cylindrical structure. It should be noted that the skirt cylinder 161 can also have other shapes, such as a square cylinder structure, etc., and the specific shape can be determined as needed.

[0076] The skirt cylinder 161 can be made of low-alloy steel or high-strength steel. The skirt cylinder 161 and the bottom of the spherical tank shell 1 can be fixedly connected by welding.

[0077] As shown in FIG. 7, the skirt cylinder 161 and the outer wall of the bottom of the spherical tank shell 1 can enclose a receiving space. The bottom manhole 120 and the medium inlet and outlet 130 at the bottom of the spherical tank shell 1 can be located in the receiving space. That is, the skirt cylinder 161 can cover the outside of the bottom manhole 120 and the medium inlet and outlet 130 at the bottom of the spherical tank shell 1. Thus, the skirt cylinder 161 can not only support the spherical tank shell 1, but also protect the maintenance structure and pipeline structure at the bottom of the spherical tank shell 1.

[0078] Referring to FIG. 8, in an embodiment, a maintenance opening 162 is formed in the sidewall of the skirt cylinder 161. The maintenance opening 162 is used for personnel to pass through, so that personnel can enter the receiving space and perform maintenance operations on the spherical tank shell 1. The maintenance opening 162 can be formed in the sidewall of the skirt cylinder 161 and can have a circular shape. Alternatively, the maintenance opening 162 can be formed in the bottom sidewall of the skirt cylinder 161 and can have an arched opening shape. It should be noted that the maintenance opening 162 can also have other shapes, and the appearance shape can be designed as needed.

[0079] Referring to FIG. 8, in an embodiment, a perforation 163 is formed in the sidewall of the skirt cylinder 161, and the perforation 163 is used for penetrating the medium inlet and outlet pipe. The perforation 163 can be circular, rectangular, elliptical, or other regular shapes, or other irregular shapes. The shape of the perforation 163 is not limited in the embodiments of the present disclosure and can be changed according to actual application.

[0080] Preferably, a support pipe 166 can be fixedly arranged at the perforation 163 of the skirt cylinder 161. The outer diameter of the support pipe 166 can be consistent with the inner diameter of the perforation 163. The support pipe 166 can be used to penetrate and support the medium inlet and outlet pipe.

[0081] The support tube 166 can be a hollow tube structure. The support tube 166 can be made of low alloy steel material or high-strength steel material. The inner diameter of the support tube 166 is larger than the outer diameter of the medium inlet and outlet pipe, so that the medium inlet and outlet pipe can be arranged in the support tube 166. Thus, the medium inlet and outlet pipe can be effectively protected and supported by the support tube 166, the stress between the medium inlet and outlet pipe and the sub-shell 110 is reduced, and the safety of the container is ensured.

[0082] It can be understood that in other embodiments, the support tube 166 can also be omitted. Other support structures can be designed in the skirt cylinder 161 to limit and support the medium inlet and outlet pipe.

[0083] Referring to FIG. 8, in an embodiment, the top end of the skirt cylinder 161 is provided with a plurality of upwardly open notches 164, and the plurality of notches 164 are arranged along the circumference of the skirt cylinder 161. The notch 164 can be a semicircular notch. It should be noted that the notch 164 can also adopt other shapes, and the appearance shape can be designed as needed.

[0084] When the top end of the skirt cylinder 161 is connected with the bottom outer wall of the spherical tank shell 1, each notch 164 causes a gap between the skirt cylinder 161 and the outer wall of the spherical tank shell 1. In this embodiment, by opening a plurality of notches 164 at the top end of the skirt cylinder 161, each notch 164 can form a gap at the connection between the skirt cylinder 161 and the spherical tank shell 1, thereby effectively avoiding the overlap of the weld when the skirt cylinder 161 and the spherical tank shell 1 are welded, and leaving a certain space for non-destructive testing. In addition, each notch 164 can facilitate the discharge of gas inside the skirt cylinder 161, ensuring safety.

[0085] Referring to FIG. 8, in an embodiment, a plurality of through holes 165 are formed on the sidewall of the skirt cylinder 161, and the plurality of through holes 165 are arranged along the circumference of the skirt cylinder 161. Each through hole 165 can be an elongated hole extending along the axial direction of the skirt cylinder 161. It should be noted that the through hole 165 can also adopt other shapes, and the appearance shape can be designed as needed.

[0086] By opening a plurality of through holes 165 on the sidewall of the skirt cylinder 161, on the one hand, each through hole 165 can be beneficial to adjusting the rigidity of the skirt cylinder 161, and has a good control effect on the stress during the operation and heat treatment of the skirt assembly 160. On the other hand, each through hole 165 can be a light transmission hole of the internal space of the skirt cylinder 161, thereby facilitating personnel to perform related operations in the containment space.

[0087] Referring to FIG. 8, in an embodiment, the skirt assembly 160 further comprises a skirt bottom plate 167 fixedly connected to the bottom end of the skirt cylinder 161. The skirt bottom plate 167 can be made of low-alloy steel or high-strength steel. The skirt cylinder 161 and the skirt bottom plate 167 can be fixedly connected by welding.

[0088] As shown in FIG. 9, the circumferential edge of the skirt bottom plate 167 is provided with a plurality of connection holes 168 for passing anchor bolts. Preferably, each connection hole 168 can be an elongated hole. The length direction of each connection hole 168 can be along the radial direction of the skirt cylinder 161, and the length extension directions of the plurality of connection holes 168 can intersect at a point. By providing the connection holes 168, the skirt assembly 160 can be fixed to the ground by anchor bolts. In addition, by designing the connection holes 168 as elongated holes, the skirt bottom plate 167 has a radial shrinkage displacement allowance, thereby facilitating the installation and connection of the overall device.

[0089] It should be noted that the connection holes 168 can also have other shapes, and the appearance shape can be designed as needed.

[0090] Referring to FIG. 7, in some embodiments, a reinforcing part can be further provided between the skirt cylinder 161 and the bottom of the spherical tank shell 1. The reinforcing part can be provided on the outer periphery of the skirt cylinder 161 and connected to the skirt cylinder 161 and the bottom of the spherical tank shell 1, respectively. For example, the reinforcing part can include a plurality of reinforcing rib plates, which are arranged on the outer periphery of the skirt cylinder 161 at intervals and connected to the bottom wall of the spherical tank shell 1. By providing the reinforcing part, the strength of the connection between the skirt cylinder 161 and the spherical tank shell 1 can be enhanced, the structural stability of the overall container can be enhanced, and the service life of the container can be prolonged.

[0091] The high-pressure gas storage container of the embodiment of the present disclosure has at least the following beneficial effects:

[0092] The high-pressure gas storage container of the embodiment of the present disclosure comprises a spherical tank shell 1, which comprises a plurality of sub-shells 110 connected to each other in the vertical direction. Since the pressure-bearing capacity of the spherical tank body is better, the pressure-bearing capacity of the spherical tank shell 1 formed by the plurality of sub-shells 110 in series is also stronger. Compared with the traditional straight-cylinder storage tank, the high-pressure gas storage container of the present disclosure can infinitely stack the sub-shells 110 upward to achieve large-capacity storage, has higher storage capacity, can meet the demand for large-capacity storage, does not need additional land area for stacking the sub-shells 110 upward, can greatly save land area, and does not need to increase the wall thickness of the tank body to improve the pressure-bearing capacity of the storage tank, can greatly save the use of materials, and has a simpler manufacturing process and lower manufacturing cost.

[0093] The high-pressure gas storage container of the embodiment of the present disclosure connects and communicates any two adjacent sub-shells 110 through the connecting assembly 150, which can facilitate to strengthen the connection strength between the two sub-shells 110, improve the overall performance of the spherical tank shell 1, and prolong the service life of the spherical tank shell 1.

[0094] The high-pressure gas storage container of the embodiment of the present disclosure respectively sets the manhole, the medium inlet and outlet 130, the valve and the instrument at the bottom and the top of the spherical tank shell 1, and the tank body side wall of the middle part of the spherical tank shell 1 can not be additionally provided with each process port and instrument interface. Thus, the excessive holes on each sub-shell 110 of the spherical tank shell 1 can be avoided, and the safety of the container can be better ensured.

[0095] The high-pressure gas storage container of the embodiment of the present disclosure is provided with the skirt assembly 160 at the bottom of the spherical tank shell 1, which is used to support the spherical tank shell 1. The skirt assembly 160 includes the skirt cylinder 161 and the skirt bottom plate 167, and has higher structural strength and higher stability, which can more stably support the spherical tank shell 1 and ensure the use safety of the container.

[0096] The high-pressure gas storage container of the embodiment of the present disclosure can enclose the receiving space with the bottom outer wall of the spherical tank shell 1 and the skirt cylinder 161, and make the bottom manhole 120 and the medium inlet and outlet 130 at the bottom of the spherical tank shell 1 located in the receiving space. Thus, the skirt cylinder 161 can not only stably support the spherical tank shell 1, but also protect the maintenance structure and pipeline structure at the bottom of the spherical tank shell 1.

[0097] The high-pressure gas storage container of the embodiment of the present disclosure is provided with structures such as the maintenance opening 162, the perforation 163, the notch 164 and the through hole 165 on the skirt cylinder 161, which can make the use of the container more convenient and safe.

[0098] The above embodiments are only exemplary descriptions of structures, and the structures in each embodiment are not fixedly combined. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined.

[0099] Those skilled in the art will understand that the scope of the present disclosure is not limited to the above specific embodiments, and some elements of the embodiments can be modified and replaced without departing from the spirit of the present disclosure. The scope of the present disclosure is limited by the appended claims.

Claims

1. A hydrogen gas ball tank inlet and outlet device characterized by, The application relates to a hydrogen tank inlet and outlet device. The flange cover is arranged on the top manhole of the spherical tank shell, and at least one mounting through hole is arranged on the flange cover. The connecting convex ring is arranged on the inner periphery of the mounting through hole. At least one connecting pipe structure is arranged corresponding to the connecting convex ring. The inner periphery of the connecting convex ring is outwardly convex along the circumferential direction. The inner periphery wall of the mounting through hole is inwardly convex along the circumferential direction. The convex part of the connecting convex ring is opposite to the convex part on the mounting through hole. The outer periphery wall of the connecting convex ring and the inner periphery wall of the mounting through hole jointly form an annular welding gap. The connecting convex ring is welded on the inner periphery wall of the mounting through hole along the welding gap. The outer periphery wall of the connecting convex ring comprises a first inner inclined surface, a first transition surface and a first outer inclined surface which are sequentially connected along the axial direction and upward. The inner periphery wall of the mounting through hole comprises a second inner inclined surface, a second transition surface and a second outer inclined surface which are sequentially connected along the axial direction and upward. The first inner inclined surface and the second inner inclined surface form a first included angle which is directed to the spherical tank shell. The first transition surface and the second transition surface are opposite to each other. The first outer inclined surface and the second outer inclined surface form a second included angle which is directed away from the spherical tank shell. The interval between the first transition surface and the second transition surface is 1mm-3mm. The angle of the first included angle is 50-55 degrees. The angle of the second included angle is 45-50 degrees. The axial dimension of the connecting convex ring matches the axial length of the mounting through hole. The lower side of the connecting convex ring along the axial direction is flush with the lower end of the mounting through hole along the axial direction. The lower side of the connecting convex ring along the axial direction is flush with the lower end of the connecting pipe structure along the axial direction. The upper side of the connecting convex ring directed away from the spherical tank shell is an inclined surface, so that the axial dimension of the connecting convex ring gradually increases along the radial direction close to the axial center. The axial angle between the inclined surface and the connecting pipe structure is 40-50 degrees. The upper end of the inclined surface is arc-shaped, and the arc-shaped part of the inclined surface is tangent to the outer periphery wall of the connecting pipe structure. The upper end of the inclined surface is arc-shaped, and the arc-shaped part of the inclined surface is tangent to the outer periphery wall of the connecting pipe structure. ​ ​ ​ ​ ​ The mounting through holes are provided in plurality, and the plurality of mounting through holes are distributed in a circumferential direction at intervals around the center of the flange cover, and the connecting pipe structures are provided in plurality, and the connecting pipe structures are provided on the mounting through holes one by one through the connecting convex rings.

10. The hydrogen gas ball tank gas inlet and outlet device according to claim 1, wherein The connecting pipe structure and the connecting convex ring are formed by integral molding.

11. The hydrogen gas ball tank gas inlet and outlet device according to claim 1, wherein The connecting pipe structure is provided with a connecting flange at an end away from the connecting convex ring in a circumferential direction.

12. The hydrogen gas ball tank gas inlet and outlet device according to claim 1, wherein The flange cover comprises a cylinder body and a cover body, one end of the cylinder body is provided with an opening and is sleeved on a top manhole of the ball tank shell, the cover body is detachably connected to a bottom edge of the cylinder body, the cover body is configured to cover or open the other end of the cylinder body, and the mounting through hole is provided on the cover body; One side of the cover body is rotationally connected to the cylinder body, and the other side is connected to the cylinder body through a bolt; the cover body is provided with a handle, and the mounting through hole is located between the handle and the rotationally connected position of the cover body; The cylinder body and the cover body are provided with a sealing ring at a position where they are covered with each other.

13. A hydrogen gas balloon tank characterized by comprising: The hydrogen gas ball tank gas inlet and outlet device comprises: A ball tank shell, the top of the ball tank shell is provided with a top manhole, the flange cover is provided on the top manhole and can close the top manhole, and the hydrogen gas ball tank gas inlet and outlet device is provided at the top manhole.

14. The hydrogen gas ball tank according to claim 13, wherein The material of the ball tank shell is different from that of the flange cover.

15. The hydrogen gas ball tank according to claim 13, wherein The material of the ball tank shell is quenched and tempered high-strength steel, and the material of the flange cover and the connecting pipe structure is 20MnMoD.

16. The hydrogen gas ball tank according to claim 13, wherein The number of the ball tank shell is one; The hydrogen gas ball tank further comprises a support, the support is arranged below the ball tank shell, and the support is used for supporting the ball tank shell.

17. The hydrogen gas ball tank according to claim 13, wherein The ball tank shell comprises a plurality of sub-shells, the plurality of sub-shells are connected to each other in a body along a vertical direction, and the inner cavities of the plurality of sub-shells are communicated with each other and form a storage space for storing a medium; The hydrogen gas ball tank further comprises a skirt assembly arranged at the bottom of the ball tank shell, the skirt assembly comprises a skirt cylinder body, the top end of the skirt cylinder body is fixedly connected to the bottom of the ball tank shell, and the skirt cylinder body and the outer wall of the bottom of the ball tank shell surround to form an accommodation space; The skirt cylinder body is provided with an access hole and a perforation on the side wall, and the perforation is used for penetrating the medium inlet and outlet pipe.

18. The hydrogen gas ball tank according to claim 17, wherein The bottom of the ball tank shell is provided with a bottom manhole and a medium inlet and outlet, the medium inlet and outlet is used for communicating with the medium inlet and outlet pipe, and the bottom manhole and the medium inlet and outlet are located in the accommodation space.

19. The hydrogen balloon tank of claim 17, wherein, The top end of the skirt cylinder is provided with a plurality of upwardly open notches, the plurality of notches are arranged at intervals along the circumference of the skirt cylinder, and each of the notches forms a space between the skirt cylinder and the outer wall of the spherical tank shell when the top end of the skirt cylinder is connected to the bottom outer wall of the spherical tank shell; and / or A plurality of through holes are formed in the sidewall of the skirt cylinder, the plurality of through holes are arranged at intervals along the circumference of the skirt cylinder, and each of the through holes is an elongated hole extending along the axial direction of the skirt cylinder.

20. The hydrogen gas spherical tank according to claim 17, wherein The skirt assembly further comprises a skirt bottom plate, the skirt bottom plate is fixedly connected to the bottom end of the skirt cylinder, and a plurality of connecting holes for passing foundation bolts are arranged at the circumferential edge of the skirt bottom plate.

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