A breakable support device and a multi-layer container

Abstract

The application discloses a breakable supporting device and a multilayer container. The multilayer container is coaxially sleeved, and a sandwich space is arranged between the outermost two layers of containers. The breakable supporting device is arranged in the sandwich space. The breakable supporting device comprises a supporting unit and a transmission unit. The supporting unit is provided with a first supporting part, a second supporting part and a reset element connected between the first supporting part and the second supporting part and arranged in an axial direction. The supporting unit has two states of supporting and breaking. When the container bears a load in transportation or the like, the breakable supporting device is in the state of supporting, and the two ends of the breakable supporting device abut against the wall of the outermost container and the wall of the container adjacent to the outermost container respectively, so that the inner container is prevented from shaking and the sandwich space is damaged. After the transportation is completed, the supporting unit of the breakable supporting device can be disconnected from the outermost container, so that the heat conduction path from the outermost container to the inner container through the breakable supporting device is cut off, and the heat transfer is reduced.

Description

Technical Field

[0001] This invention relates to the field of liquid hydrogen storage technology, specifically to a detachable support device and a multi-layer container. Background Technology

[0002] Liquid hydrogen technology, as a key clean energy technology for achieving deep decarbonization, has broad prospects for future development, but it needs to overcome core challenges such as cost reduction, scaling up, and infrastructure construction. Among these, scaling up storage and transportation technology is a key breakthrough direction, and large-capacity, low-evaporation-rate liquid hydrogen storage containers are the main research topic at present.

[0003] Liquid hydrogen has a boiling point of around -253°C at normal pressure. Even a small amount of external heat input can cause a large amount of liquid hydrogen to evaporate, increasing liquid hydrogen loss and shortening storage time. Therefore, liquid hydrogen storage containers have extremely high insulation requirements and are usually high-vacuum insulated containers, consisting of an inner container and an outer container connected together, with a space between the inner and outer containers for insulation protection.

[0004] To prevent damage to the interlayer space due to inertial swaying during transportation, a connecting mechanism is installed between the inner and outer containers to fix their relative positions and convert inertial loads into equivalent static forces. Commonly used connecting mechanisms include rigid supports, hinges, tie rods, slings, and support straps, with rigid support structures being the most common. For example, Chinese Patent 202411142492.8, "A Fixed High-Vacuum Insulated Liquid Hydrogen Horizontal Storage Tank," provides support structures at the fixed part, bottom, horizontal direction, and axial direction of the inner tank. The support structure includes a support base, a sleeve, and a support rod. One end of the support base is connected to the outer wall of the inner tank, and the other end extends to the outer tank. One end of the sleeve is connected to the inner wall of the outer tank, and the other end extends to the inner tank. Both the extended ends of the sleeve and the support base have annular grooves. The two ends of the support member are engaged in the annular grooves and abut against the sleeve and the support base, respectively, to fix the relative position between the inner and outer tanks.

[0005] However, once the support is fixed in place, it cannot be removed, and the inner and outer containers remain connected. Therefore, in addition to heat radiation between the inner and outer containers, heat input is also mainly caused by heat conduction through the support structure, which increases the loss of liquid hydrogen.

[0006] To minimize heat leakage from the connection structure, magnetic levitation support structures have been developed, such as Chinese patent CN121452481 A. In this structure, a permanent magnet is placed on the outer surface of the inner container, and an electromagnet is placed on the inner surface of the outer container at a position relative to the permanent magnet. When the electromagnet is energized, the inner container is suspended inside the outer container, thereby eliminating heat leakage from the connection structure. However, magnetic levitation support requires the electromagnet to be kept energized, which is costly, and ensuring the energized state poses a significant challenge to transportation requirements.

[0007] Therefore, a low-cost, simple-structure support component is needed that can disconnect the connection between the inner and outer containers after fulfilling its supporting and fixing function, thus preventing heat leakage from the connection structure.

[0008] Therefore, this invention is proposed. Summary of the Invention

[0009] To address the issue of the support structure continuing to conduct heat after transportation support is completed, this invention provides a disconnectable support device. On the one hand, it can be disconnected as needed, eliminating continuous heat leakage. On the other hand, the support device has a simple structure, and the switching between support and disconnection states is convenient and inexpensive.

[0010] The present invention is a detachable support device, characterized in that it comprises: A support unit includes a first support portion, a second support portion, and a reset element connected between the two, arranged axially. The support unit has a supported state and a disconnected state. A transmission unit, which is in transmission cooperation with the first support part, is used to apply a driving force to the support unit; In the supported state, the first support part abuts against the transmission unit and the second support part respectively, and the reset element is in an energy storage state; When the transmission unit drives the first support part to circumferentially misalign with the second support part, the reset element releases its stored energy, causing the first support part to move axially and separate from the transmission unit, and the support unit switches to the disconnected state.

[0011] The detachable support device of this invention, through a first support part and a second support part arranged coaxially, remains relatively fixed in the support state, together forming a rigid support body to achieve the support function; when the support state needs to be terminated, the first support part and the second support part can be driven to move circumferentially and axially relative to each other in sequence through the cooperation of a transmission unit and a reset element, thereby realizing the axial retraction action of the support device and disconnecting the support. The reset unit is coaxial with the support unit, and its two ends are respectively connected to the centers of the first base and the second base.

[0012] Preferably, the reset unit is an elastic element that stores energy when stretched and contracts when releasing the stored energy.

[0013] The detachable support device of the present invention has a coaxial elastic reset element inside the support unit. Utilizing the easy deformation characteristics of the elastic material, the first support part and the second support part can be connected in both the supported and disconnected states of the support unit. At the same time, the elastic material completes energy storage and energy release through deformation. It is coaxially set with the support unit to provide axial power in both the supported and disconnected states.

[0014] The first support portion includes a first base and a first column protruding axially from the first base, and the second support portion includes a second base and a second column protruding axially from the second base.

[0015] In the supported state, the first seat abuts against the transmission unit, and the end of the first column abuts against the end of the second column.

[0016] In the disconnected state, the end of the first column abuts against the second base, and the end of the second column abuts against the first base.

[0017] The first support includes a plurality of first columns, each of which is distributed at intervals along the circumference of the first base.

[0018] The second support includes a plurality of second columns, each of which is distributed at intervals along the circumference of the second base, and the number of the second columns is equal to the number of the first columns.

[0019] In the supported state, each of the first columns and each of the second columns are paired and abutted together.

[0020] In the disconnected state, each of the first columns is inserted into the gap between adjacent second columns.

[0021] Preferably, the fixed support member includes four first support sections, and the movable support member includes four second support sections.

[0022] The first column and the second column of the support unit of the present invention are each spaced apart along the axial direction, and the interval forms a groove. On the one hand, the groove provides a guiding function for the multiple second columns when the first support part moves axially relative to the second support part, guiding the first column to move towards the second base. On the other hand, when disconnected, the groove allows multiple first main bodies and multiple second columns to be inserted to form an interlocking structure, avoiding the first support part from rolling and affecting production safety.

[0023] The transmission unit includes: The driving component is used to receive external power and transmit torque; The driven member is coaxially arranged with the driving member and is used to receive and transmit the torque output by the driving member; The connector has a tubular structure, with its two ends connected to the driving member and the driven member, respectively.

[0024] In the supported state, the first seat body abuts against the driven member.

[0025] The driving member drives the first support portion to rotate around an axis via the driven member, causing a circumferential misalignment between the first and second support portions, thereby switching the support unit to the disconnected state. The connecting member includes: The transition section has a tubular structure and an internal partition wall perpendicular to the axial direction, which divides the transition section into a first chamber and a second chamber, which are used to accommodate the driving member and the driven member, respectively. A receiving groove is embedded in the second cavity, the bottom of which is used to encapsulate the driven member, and the opening of the groove faces the first support portion.

[0026] The connector of the present invention has a transition section and an internal isolation wall. The transition section is tubular and provides circumferential constraint for the driving and driven components, ensuring that they are always coaxial. The isolation wall separates the driving and driven components, realizing non-contact power transmission and avoiding heat transfer between the driving and driven components.

[0027] Furthermore, the second cavity is provided with a receiving groove with its opening facing the first support part, which provides a keyway for the first support part in the supported state, thereby realizing a key connection between the transmission unit and the first support part.

[0028] The driven element is composed of a plurality of first magnets with alternating positive and negative polarities arranged circumferentially.

[0029] The active component includes a magnetic section consisting of a plurality of second magnets with alternating positive and negative polarities arranged circumferentially.

[0030] The number of the second magnets is equal to that of the first magnets, and the polarities of the first magnets and the second magnets arranged opposite to each other are opposite, so that the driving member and the driven member can achieve non-contact torque transmission through magnetic force.

[0031] Preferably, the number of the first magnet and the second magnet is four.

[0032] In this invention, the number of the first magnet and the second magnet are the same, so that the driven member and the driving member always rotate synchronously with a transmission ratio of 1:1. The inner transmission member and the outer transmission member each include four magnets with alternating positive and negative poles, and the maximum phase difference is 45°. This can not only bear stronger magnetic force interaction, but also have good magnetic restoring force, thus avoiding excessive torque load.

[0033] With the above-described configuration, the transmission unit of this invention uses magnetic force to transmit torque, avoiding the through-structure characteristics and sealing problems at the shaft connection caused by the mechanical shaft. It can transmit torque while ensuring a sealing effect.

[0034] The active component also includes a wrapping layer, which covers the outside of the magnetic part and is embedded in the first cavity. The top of the wrapping layer is provided with a limiting structure for connecting to an external power mechanism.

[0035] Preferably, the limiting structure is a polygonal countersunk hole that accommodates an external power mechanism. When the external power mechanism applies torque to the driving member, the polygonal inner wall squeezes the power mechanism to generate friction, forming a torque around the center of the polygon. This torque reacts on the inner wall of the polygon, thereby driving the driving member to rotate, and the torque is transmitted to the driving member.

[0036] Preferably, the polygonal countersunk hole is a regular polygonal countersunk hole, which is set on the top of the wrapping layer and centered on the central axis of the support device, so that the extrusion friction generated on each surface is equal and the torque is circumferentially balanced.

[0037] Preferably, the number of sides of the polygonal countersunk hole is the same as the number of the first column.

[0038] The number of sides of the polygonal countersunk hole described in this invention is the same as the number of the first pillars, which facilitates control of the rotation angle of the active component. When the active component rotates through the interior angle of the polygon, the first support portion also rotates relative to the second support portion by a corresponding angle. Since the number of sides of the countersunk hole is equal to the number of the first pillars, after rotating the angle, each first pillar and each second pillar are completely misaligned, and each first pillar is directly opposite the interval between adjacent second pillars. Therefore, as long as the active component is controlled to rotate through the angle, a smooth switch from the supported state to the disconnected state can be completed.

[0039] The transition section, the wrapping layer, and the receiving groove are all made of antimagnetic or paramagnetic materials. Preferably, the transition section, the wrapping layer, and the receiving groove are all made of paramagnetic material.

[0040] Furthermore, the transition section, the wrapping layer, and the receiving groove are all made of austenitic stainless steel, which facilitates welding and sealing, and is non-magnetic, so as not to affect the magnetic connection between the driving and driven parts.

[0041] The first support is made of ferromagnetic material, and in the supported state, the first support is connected to the driven member by magnetic attraction.

[0042] On the other hand, the present invention discloses a multi-layer container.

[0043] The multi-layer container includes: a multi-layer container arranged coaxially nested, wherein there is an interlayer space between the inner wall of the outermost container and the outer wall of the adjacent second outermost container; The detachable support device is located within the interlayer space.

[0044] The connector of the detachable support device passes through the wall of the outermost container axially and is fixedly connected to the wall of the outermost container circumferentially. The second seat of the detachable support device is fixedly connected to the outer surface of the second outermost container.

[0045] The detachable support device is configured as follows: In the transport state, the support unit is in the support state to support the outermost container and protect the interlayer space; After transportation is completed and the unit is in a static state, the active component receives external power to drive the support unit to switch to the disconnected state.

[0046] The detachable support device allows switching to the disconnected state after support is completed, fundamentally blocking heat conduction along this path in the static state and effectively reducing heat leakage of the container in the fixed state.

[0047] Preferably, the outer periphery of the connector is welded to the wall of the outermost container to seal the outer container and prevent heat loss and pressure imbalance.

[0048] The multi-layered container can be a horizontal container or a vertical container.

[0049] The detachable support device can be installed at any position at the bottom, circumference, and top of the container.

[0050] Preferably, the multi-layer container can be used to store liquid hydrogen, with the innermost container storing liquid hydrogen and the support device between the outermost container and the next outermost container being detachable. After the container is fixed, the heat is blocked from being conducted along the support device, thereby reducing the loss of liquid hydrogen due to evaporation.

[0051] The present invention achieves the following beneficial effects through the above technical solution: 1. In the transportation phase of the container, the detachable support device of the present invention, the first support part is relatively fixed to the second support part under the constraint of the receiving groove and the magnetic connection of the driven part, together forming a rigid support structure, providing reliable support for the container to withstand the transportation load; after the container is transported and fixed, the transmission unit transmits torque, and in conjunction with the reset element, drives the first support part to perform an axial disengagement action, so that it is disconnected from the outer container wall, so that the support device designed for transportation load can be physically disconnected after completing its support mission, fundamentally blocking the heat conduction on this path, and effectively reducing the heat leakage of the container in the fixed use state.

[0052] 2. The detachable support device of the present invention uses a magnetic drive element, which eliminates the need to set a through shaft and through hole on the container wall. The driving and driven parts of the drive element are encapsulated and fixed on the outermost container wall through a transition section, which effectively avoids openings while providing torque, ensuring the sealing effect of the container, reducing heat leakage, and reducing liquid hydrogen evaporation loss.

[0053] 3. The non-power structure of the transmission unit described in this invention is made of non-ferromagnetic materials, which not only ensures that the torque is effectively transmitted through magnetic coupling to achieve remote operation, but also isolates the direct contact between the inner and outer transmission components in the structure, further reducing heat conduction through the component and ensuring the sealing integrity of the outer shell.

[0054] 4. When the first support part of the detachable support device of the present invention is axially disengaged from the outer container wall, the engagement of the first column and the second column, combined with the tension of the elastic recovery member, achieves perfect storage of the movable support part and avoids safety hazards. Attached Figure Description

[0055] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0056] In the attached diagram: Figure 1 This is a schematic structural diagram showing the detachable support device in its supported state combined with the inner and outer containers. Figure 2 for Figure 1 Cross-sectional view of support device Figure 3 This is a sectional view of the transmission unit; Figure 4 This is a schematic diagram of the disconnectable support device in its disconnected state.

[0057] Figure 5 Sectional view of the supporting unit Among them, 1. Inner container; 2. Outer container; 3. Disconnectable support device; 301. Support unit; 311. First support part; 312. Second support part; 313. Reset element; 3111. First seat; 3112. First column; 3121. Second seat; 3122. Second column; 302. Transmission unit; 321. Driving element; 3211. Magnetic part; 3212. Enclosing layer; 3213. Limiting structure; 322. Driven element; 323. Connecting element; 3231. Transition section; 3232. Receiving groove; 3233. Isolation wall. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0059] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0060] In the description of this invention, it should be noted that the terms "first," "second," etc., are only used to distinguish different steps or structures and do not indicate a sequential or primary / secondary order, and should not be construed as limitations on this application.

[0061] The present invention provides a multi-layer container, comprising multiple layers of containers arranged coaxially, wherein the innermost container is used for storing materials, and there is an interlayer space between the inner wall of the outermost container and the outer wall of the adjacent second outermost container, wherein a detachable support device is provided in the interlayer space.

[0062] In one embodiment of the present invention, the multi-layer container is a double-layer container, and the innermost container is also the second outermost container, such as... Figure 1 As shown, it includes: The inner container 1 is used to store materials; the outer container 2 is coaxially sleeved on the inner container and accommodates the inner container 1; there is a sandwich space between the inner wall of the outer container 2 and the outer wall of the inner container, and a detachable support device 3 is provided in the sandwich space.

[0063] The double-layered storage container can be either horizontal or vertical. For horizontal containers, the detachable support device 3 can be flexibly arranged on its side or bottom to resist transport loads in the vertical upward, lateral, and other directions. For vertical containers (e.g., vertically arranged liquid hydrogen storage tanks), the support structure can also be arranged in the interlayer space between its inner and outer containers to resist horizontal loads perpendicular to the direction of movement. The core principle of this invention's structure does not depend on the overall posture of the container and has wide applicability.

[0064] like Figure 1 As shown, the detachable support device 3 includes a support unit 301 and a transmission unit 302.

[0065] like Figures 2-5As shown, the support unit includes a first support portion 311, a second support portion 312 arranged along the axial direction, and a reset element 313 disposed between the two.

[0066] The first support portion 311 includes a first seat 3111 and a first column 3112 protruding axially from the first seat 3111. The second support portion 312 includes a second seat 3121 and a second column 3122 protruding axially from the second seat 3121. The two ends of the reset unit 313 are respectively connected to the centers of the first seat 3111 and the second seat 3121.

[0067] The transmission unit 302 includes a driving member 321, a driven member 322, and a connecting member 323. The connecting member 323 has a tubular structure, with its two ends connected to the driving member 321 and the driven member 322 respectively, constraining the driving member 321 and the driven member 322 to be coaxial.

[0068] The connector 323 includes a tubular transition section 3231, with an internal isolation wall 3233 perpendicular to the axial direction, dividing the transition section into a first chamber and a second chamber.

[0069] The first chamber accommodates the active member 321, and the second chamber is provided with a receiving groove 3232, the bottom of which encapsulates the driven member 322, and the groove opening is opposite to the first support part 311.

[0070] The driven member 322 is composed of a plurality of first magnets with alternating positive and negative polarities arranged circumferentially, and is encapsulated at the bottom of the receiving groove 3232.

[0071] The active component 321 includes a magnetic part 3211 composed of a plurality of second magnets with alternating positive and negative polarities along the circumferential direction, and a wrapping layer 3212 covering the outside of the magnetic part 3211, which is embedded in the first chamber 3234.

[0072] The active component 321 and the driven component 322 are respectively disposed on both sides of the isolation wall 3233. The number of second magnets is equal to that of the first magnets, and the polarities of the first magnets and the second magnets disposed opposite to each other are opposite, so that a stable combination of attractive and repulsive forces is formed between the corresponding magnetic poles of the active component 321 and the driven component 322, so that the driven component 321 and the active component 322 always rotate synchronously with a transmission ratio of 1:1, realizing non-contact torque transmission.

[0073] The top of the wrapping layer 3212 is provided with a limiting structure 3213 for connecting to an external power mechanism.

[0074] The second seat 3121 is fixed on the outer surface of the inner container 1, and the second column 3122 extends from the outer surface of the inner container 1 toward the outer container 2.

[0075] To provide a stable and secure connection, the second seat 3121 is preferably welded to the inner container 1. The welded connection forms a metallurgical bond, ensuring the connection strength and sealing between the second seat 3121 and the thin-walled inner container 1, and preventing loosening or leakage at the connection point under various loads (including transport impacts and thermal stress). As a process option, welding methods suitable for stainless steel and with low heat input, such as argon arc welding, can be used to reduce the impact of the weld heat-affected zone on the properties of the inner container base material.

[0076] The tubular transition section 3231 of the connector 323 penetrates the outer container wall, with the two ends of the tube located outside and inside the outer container 2, respectively. The first chamber faces outward from the outer container 2, and the second chamber faces the interlayer space inside the outer container 2. The first chamber and the second chamber are sealed and separated by the isolation wall 3233, and the transition section 3231 is circumferentially connected to the seal.

[0077] To ensure the sealing integrity of the interlayer space, the transition section 3231 is typically welded to the outer container 2. Specifically, the circumferential direction of the transition section 3231 is connected to the edge of the opening on the outer container 2 by a continuous weld, thereby ensuring the sealing of the outer wall of the outer container 2. This welding connection method is simple and reliable, forming part of the pressure-bearing and sealing structure of the outer container 2.

[0078] In some specific embodiments, besides welding, other connection methods can be considered between the second seat 3121 and the inner container 1, provided that strength and sealing requirements are met. For example, a structure using a specially designed low-temperature adhesive combined with mechanical locking can be used. However, welding remains the most reliable and widely used preferred solution in current engineering practice. Similarly, other connection forms can be explored between the transition section 3231 and the outer container 2, provided that sealing is ensured.

[0079] The active component 321 is embedded in the first cavity and is rotatable in the circumferential direction, while the limiting structure 3213 faces outward; the receiving groove 3232 is fixedly embedded in the second cavity with the bottom of the groove facing the isolation wall 3233, and the driven component 322 is encapsulated at the bottom of the groove. The driven component 322 can rotate circumferentially within the receiving groove 3232.

[0080] At least the transition section 3231 and the receiving groove 3232 in the transmission unit 302 are made of materials that are either antimagnetic or paramagnetic and meet the requirements of structural strength and vacuum sealing. The antimagnetic or paramagnetic materials themselves do not produce significant magnetizing or shielding effects on the magnetic field, thereby ensuring the effective penetration and coupling of magnetic lines of force between the driving member 321 and the driven member 322, and avoiding the additional thermal bridge effect formed by the continuous connection of the support unit 301 and the transmission unit 302 through the magnetic circuit due to the ferromagnetic materials, further optimizing the thermal insulation performance.

[0081] Preferably, at least the transition section 3231 and the receiving groove 3232 are made of austenitic stainless steel (such as 304L, 316L), which is similar to the container material, facilitates welding and sealing, maintains good toughness at low temperatures, and is non-magnetic, so as not to affect the magnetic connection between the active member 321 and the driven member 322.

[0082] The first support part 311 is made of ferromagnetic material. During the transportation, hoisting or bearing dynamic loads (such as the transportation loads defined in the NB / T 11882-2025 standard) of the double-layer storage container, the support device 3 is in a supported state and forms a key connection with the receiving groove 3232, so that the first support part 311 and the driven member 322 are coaxial, forming a support for the outer container 2, while maintaining the necessary displacement freedom in the axial (vertical direction) direction to facilitate subsequent detachment and falling support of the outer container wall.

[0083] Specifically, when the detachable support device 3 is in the support state, such as Figure 1 , 2 As shown, the first support portion 311 extends into the receiving groove 3232, the first seat 3111 is attracted by the follower 322 encapsulated at the bottom of the receiving groove 3232 and fits against the bottom of the receiving groove 3232, the first column 3112 extends from the first seat 3111 in the circumferential direction toward the container 1, and its end abuts against the end of the second column 3222, supporting the first seat 3111 to abut against the bottom of the receiving groove 3232, thus forming a support.

[0084] Meanwhile, a reset element 313 is provided between the first seat 3111 and the second seat 3121. The two ends of the reset element 313 are respectively connected to the first seat 3111 and the second seat 3121. Due to the abutment of the first column 3112 and the second column 3122 and the attraction of the driven member 322 on the first support 311, the distance between the first seat 3111 and the second seat 3121 is maximized, and the reset element 313 is stretched, accumulating energy.

[0085] When the transportation process of the double-layer storage container is completed and the detachable support device 3 is no longer needed, the detachable support device 3 can be disconnected using a power component outside the container, such as... Figure 4 As shown.

[0086] Specifically, the external power component is connected to the driving component 321 via the limiting structure 3213. Rotating the power component transmits torque to the driving component 321. As the driving component 321 rotates, since the receiving groove 3232 and the isolation wall 3233 are both made of austenite, magnetic lines of force can penetrate them. The driven component 322 also has magnetism, thus coupling and rotating synchronously with the driving component 321. Since the first support part 311 is also magnetically connected to the driven component 322, the first support part 311 also rotates when the driven component 322 rotates. The end of the first column 3112 is misaligned with the end of the second column 3122, and the first support part 311 no longer has abutting support from the second support part 312.

[0087] As the first support 311 loses its axial support, the reset element 313 loses its tension and resets. The energy stored in the tension is released, and at the same time as the reset, it pulls the first support 311 away from the receiving groove 3232 and moves toward the second support 312, thus realizing the disconnection of the detachable support device 3 from the outer container wall.

[0088] At this point, the original complete heat conduction path from the transmission unit 302 and the first support 311 to the inner container 1 is physically broken, thereby completely eliminating the static heat transfer caused by the support structure designed specifically for transportation during the fixed use of the container, and significantly reducing the overall heat leakage of the container.

[0089] In addition, to further reduce the thermal bridging effect, all metal parts located between the inner container 1 and the outer container 2 (such as the second support 312, etc.) can be made of materials with relatively low thermal conductivity, such as stainless steel or a specific alloy with low thermal conductivity.

[0090] In one specific implementation, the first magnet and the second magnet can be permanent magnets, such as neodymium iron boron (NdFeB) magnets.

[0091] As a specific parameter selection, the number of the first magnet in the driving member 321 and the second magnet in the driven member 322 is set to four, achieving a maximum phase difference of 45°. This provides multiple balanced magnetic pole pairs in the 360-degree circumferential direction, which can not only bear stronger magnetic interaction, ensuring sufficient and uniform radial magnetic force (including attraction and repulsion) between the driving member 321 and the driven member 322, thus improving the torque capacity of magnetic coupling and the smoothness of synchronous transmission, but also has good magnetic restoring force, enabling the transmission unit 302 to resist slight axial or radial misalignment and reducing the risk of transmission failure due to assembly tolerances or excessive load.

[0092] Furthermore, the use of four staggered magnets optimizes the spatial distribution of the magnetic field, enabling the torque to be transmitted continuously and smoothly, avoiding the "jerkiness" or torque fluctuations caused by a small number of magnetic pole pairs. The rotation of the active component 321 is smoother, and the action of driving the first support part 311 to rotate is more precise and reliable.

[0093] In one specific embodiment of the present invention, the second support portion 312 includes a plurality of second columns 3122, which are spaced apart circumferentially along the second base 3121. Correspondingly, the first support portion 311 also includes a plurality of first columns 3112, which are spaced apart circumferentially along the first base 3111. The number of first columns 3112 and second columns 3122 is equal.

[0094] During the transport, hoisting, or bearing dynamic loads (such as the transport loads defined in the NB / T 11882-2025 standard) of the double-layer storage container, when the disconnectable support device 3 is in the supported state, each of the first columns 3112 and each of the second columns 3122 are paired and abutted against each other in a one-to-one correspondence.

[0095] When the load bearing ends and the first support 311 moves axially toward the second support 312 under the action of the reset element 313, each of the second columns 3122 guides each of the first columns 3111 to insert into the gap between adjacent second columns 3122, forming an interlocking structure. The engagement state not only fixes the first support 311, which is disengaged from the keyway (i.e., the receiving groove 323), preventing it from wobbling in the interlayer space, but also ensures that after the magnetic connection is disconnected, the first support 311 and the second support 312 can still be relatively positioned through a low-stress contact (or a slight gap), without forming a completely unrestrained cantilever state. This avoids potential vibration or collision problems and provides a passive mechanical mechanism that automatically and reliably fixes the moving parts after disengagement. No additional operating steps or locking devices are required, simplifying the overall process of disconnection and improving the reliability and automation of the system.

[0096] As a specific option, the first column 3112 and the second column 3122 can be columns with vertical sidewalls.

[0097] In one specific embodiment of the present invention, the two ends of the reset element 313 are respectively fixedly connected to the center of the first base 3111 and the center of the second base 3121.

[0098] Since the connection point is located at the central axis of the two, it can be ensured that when the reset element 313 retracts, the direction of the pulling force applied to the first support 311 always passes through its center of mass, avoiding the generation of eccentric torque that would cause the first support 311 to tilt or get stuck during the falling process, so that the first support body 3112 can fall into the engagement groove accurately and smoothly.

[0099] Furthermore, the reset element 313 specifically adopts a helical spring, whose preload and stroke can be precisely designed and adjusted according to the required release force and falling displacement, and has the advantages of fast response, simple structure and low cost.

[0100] As a specific parameter selection, the preload of the helical spring needs to be designed to overcome the attraction of the moving follower 322 to the first support 311, as well as the slight frictional resistance that may be generated between the first support 311 and the receiving groove 323, and between the first column 3112 and the second column 3122 due to machining tolerances, but not so large as to affect the normal torque transmission.

[0101] As a specific option, the sidewalls of the first column 3112 and the second column 3122 can also be deflected arcs. The arcs of the corresponding first column 3112 and second column 3122 sidewalls are the same, the deflection angles are the same, and the deflection directions are opposite. This guides the first column 3112 to move axially toward the second support 312 while also performing a small circumferential rotation to return to its original position in accordance with the circumferential torsion of the helical spring, further reducing friction and improving the smoothness of movement.

[0102] In the third embodiment of the present invention, the limiting structure 3212 is a regular polygonal countersunk hole provided on the top of the wrapping layer 3212, which facilitates the insertion of the power component into the countersunk hole to rotate and transmit torque, and also facilitates the disconnection of the power component from the active component 321 after the transmission is completed, blocking the unnecessary connection of the operating mechanism, and further reducing the heat leakage of this path from the design source.

[0103] The polygonal walls of the countersunk hole radially press against the power component, generating friction and forming a torque around the geometric center of the polygon. This torque reacts on the inner wall of the countersunk hole, thereby driving the active component 321 to rotate and completing the torque transmission.

[0104] Preferably, the geometric center of the polygonal countersunk hole is on the central axis of the transmission unit 302 and the support unit 301, so that the torque on each inner wall of the countersunk hole is equal and circumferentially balanced.

[0105] As a specific option, the countersunk hole can be a standardized internal square hole, or, depending on engineering operation habits, it can be designed as an internal hexagon, Torx, or other foolproof, dedicated tool interface.

[0106] As a specific option, the first column 3112 is evenly distributed around the first base 3111. The number of sides of the polygonal countersunk hole is the same as the number of the first column 3112, let's say N. Then the interior angle of the polygon is 360° / N, and the included angle between each first column is also 360° / N. In this way, when torque is applied to the active member 321, as long as the polygonal countersunk hole is rotated by one interior angle, the first column 3112 will naturally rotate by 360° / N as well. This will completely misalign with the second column 3122, which is also evenly distributed around the circumference and has an included angle of 360° / N, and smoothly enter the disconnection action. This avoids incomplete switching from the support state to the disconnection state due to insufficient torque application, or damage to the meshing fit between the first column 3112 and the second column 3122 due to excessive torque application.

[0107] In another embodiment of the present invention, the multi-layer container is a three-layer container, which is coaxially arranged and nested sequentially. The innermost container is used to hold materials, and a second container is placed outside it, which is the second outermost container; a third container is placed outside the second container, which is the outermost container. There is an interlayer space between the inner wall of the third container and the outer wall of the second container, and the detachable support device 3 is provided in the interlayer space.

[0108] The tubular transition section 3231 of the transmission unit 302 of the disconnectable support device 3 penetrates the third layer container wall and is fixedly connected to the third layer container wall along the circumferential direction of the transition section. The second seat 3121 of the support unit 301 of the support device 3 is fixed on the outer wall of the second layer container.

[0109] In the transport state, the first column 3112 abuts against the second column 3212, the first base 3111 abuts against the bottom of the receiving groove 3232, and the support unit 301 is in the support state, supporting the second layer container and protecting the interlayer space; In the stationary state after transportation is completed, the active member 321 receives external power to drive the driven member 322 to rotate, which in turn drives the first support 311 to rotate. The first seat 3111 leaves the receiving groove 3232 under the migration of the reset element 313, and the first column 3112 is inserted into the gap between the second columns 3212, so that the support unit 301 switches to the disconnected state.

[0110] The detachable support device and container of this invention, through the above design, provides reliable rigid support for the inner container during the transportation phase of a container with a sandwich space to withstand the transportation load, preventing the inner container from shaking and damaging the sandwich space; during the stage of container transportation and positioning, torque is transmitted through the transmission unit, and in conjunction with the elastic element, the first support part performs an axial disengagement action, causing it to disconnect from the outermost container wall. This achieves the effect that the support device, designed specifically for transportation loads, can be physically disconnected after fulfilling its supporting mission, fundamentally blocking heat conduction along this path, effectively reducing heat leakage when the container is in fixed use, and thus reducing liquid hydrogen evaporation loss.

[0111] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A detachable support device, characterized in that, include: A support unit includes a first support portion, a second support portion, and a reset element connected between the two, arranged axially. The support unit has a supported state and a disconnected state. A transmission unit, which is in transmission cooperation with the first support part, is used to apply a driving force to the support unit; In the supported state, the first support part abuts against the transmission unit and the second support part respectively, and the reset element is in an energy storage state; When the transmission unit drives the first support part to circumferentially misalign with the second support part, the reset element releases its stored energy, causing the first support part to move axially and separate from the transmission unit, and the support unit switches to the disconnected state.

2. The detachable support device according to claim 1, characterized in that, The first support includes a first base and a first column protruding axially from the first base; The second support includes a second base and a second column protruding axially from the second base; In the supported state, the first seat abuts against the transmission unit, and the end of the first column abuts against the end of the second column. In the disconnected state, the end of the first column abuts against the second base, and the end of the second column abuts against the first base.

3. The detachable support device according to claim 1 or 2, characterized in that, The first support includes a plurality of first columns, each of which is distributed at intervals along the circumference of the first base. The second support includes a plurality of second columns, each of which is distributed at intervals along the circumference of the second base, and the number of the second columns is equal to the number of the first columns; In the supported state, each of the first columns and each of the second columns are paired and abutted against each other in a one-to-one correspondence; In the disconnected state, each of the first columns is inserted into the gap between adjacent second columns.

4. The detachable support device according to any one of claims 1-3, characterized in that, The transmission unit includes: The driving component is used to receive external power and transmit torque; The driven member is coaxially arranged with the driving member and is used to receive and transmit the torque output by the driving member; The connector has a tubular structure, with its two ends connected to the driving member and the driven member, respectively. In the supported state, the first seat body abuts against the driven member; The active component drives the first support part to rotate around the axis through the driven component, causing the first support part and the second support part to be circumferentially misaligned, thereby switching the support unit to the disconnected state.

5. The detachable support device according to claim 4, characterized in that, The connector includes: The transition section has a tubular structure and an internal partition wall perpendicular to the axial direction, which divides the transition section into a first chamber and a second chamber, which are used to accommodate the driving member and the driven member, respectively. A receiving groove is embedded in the second cavity, the bottom of which is used to encapsulate the driven member, and the opening of the groove faces the first support portion.

6. The detachable support device according to claim 4 or 5, characterized in that, The driven member is composed of a plurality of first magnets with alternating positive and negative polarities along the circumferential direction; the driving member includes a magnetic force section composed of a plurality of second magnets with alternating positive and negative polarities along the circumferential direction, the number of second magnets being equal to the number of first magnets, and the polarities of the first magnets and the second magnets being arranged opposite to each other being opposite. The driving member and the driven member achieve non-contact torque transmission through magnetic force.

7. The detachable support device according to claim 5 or 6, characterized in that, The active component also includes a wrapping layer, which covers the outside of the magnetic part and is embedded in the first cavity. The top of the wrapping layer is provided with a limiting structure for connecting to an external power mechanism.

8. The detachable support device according to any one of claims 4-7, characterized in that, The transition section, the wrapping layer, and the receiving groove are all made of antimagnetic or paramagnetic materials. Preferably, the transition section, the wrapping layer, and the receiving groove are all made of paramagnetic material.

9. The detachable support device according to any one of claims 1-8, characterized in that, The first support is made of ferromagnetic material, and in the supported state, the first support is connected to the driven member by magnetic attraction.

10. A multi-layer container, characterized in that, include: The containers are arranged coaxially in multiple layers, with an interlayer space between the inner wall of the outermost container and the outer wall of the adjacent second outermost container. The detachable support device as described in any one of claims 1-9 is provided within the interlayer space; The connector of the detachable support device passes through the wall of the outermost outer container along the axial direction and is fixedly connected to the wall of the outermost container in the circumferential direction. The second seat of the detachable support device is fixedly connected to the outer surface of the second outermost container. The detachable support device is configured as follows: In the transport state, the support unit is in the support state to support the outermost container and protect the interlayer space; After transportation is completed and the unit is in a static state, the active component receives external power to drive the support unit to switch to the disconnected state.

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