Connecting structure of tank body and tank bin in solid-state hydrogen storage device

Abstract

This utility model discloses a connection structure between a tank and a storage bin in a solid-state hydrogen storage device, including a tank and a storage bin. The storage bin has an installation cavity adapted to the shape of the tank. The tank is axially inserted into the installation cavity. A connector seat is provided through the upper end of the storage bin. A tank connector is fixedly provided at the upper end of the tank and is circumferentially sealed within the connector seat. A storage bin base is fixedly provided at the lower end of the storage bin, and a tank base is fixedly provided at the lower end of the tank. The tank base is spirally disposed within the storage bin base. An axially retractable locking push rod is fixedly provided on the outer wall of the storage bin. A mating part is provided at the upper end of the tank base. The locking push rod and the mating part are engaged in a circumferential locking / unlocking manner. Using the above-mentioned connection structure between the tank and the storage bin in the solid-state hydrogen storage device improves the convenience of tank assembly and disassembly.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen energy battery technology, specifically to a connection structure between the tank and the storage tank in a solid hydrogen storage device. Background Technology

[0002] In the field of drone technology, endurance is a core factor limiting its ability to perform long-duration missions. Hydrogen fuel cells, with their significant advantages such as high energy density, long endurance, fast refueling, and zero carbon emissions, have become a key power supply solution for addressing the long endurance requirements of drones.

[0003] Currently, mainstream hydrogen storage technologies are mainly divided into three categories: gaseous hydrogen storage, liquid hydrogen storage, and solid hydrogen storage. Among them, gaseous hydrogen storage technology is widely used in existing hydrogen fuel cell drones, but this technology requires high-pressure hydrogen storage containers, which are large in size and can easily lead to a bulky drone system structure, encroaching on the effective payload space. Liquid hydrogen storage requires the liquefaction and storage of hydrogen in a low-temperature environment, and the hydrogen storage tank needs to be made of high-strength, low-temperature resistant materials, which significantly increases the overall weight of the battery system and is not conducive to improving the drone's payload capacity and flight efficiency. Solid hydrogen storage achieves storage by adsorbing or absorbing hydrogen through hydrogen storage materials, which has lower requirements for the strength of the tank material, and the hydrogen storage unit is relatively compact, making it more suitable for the lightweight and miniaturized structural requirements of drones. It is a highly promising direction for hydrogen storage technology.

[0004] However, existing solid-state hydrogen storage technology still has shortcomings: to ensure the stability of the hydrogen storage tank under conditions such as drone flight vibration and attitude changes, the tank and the drone's tank compartment are mostly connected by threads, clamps, or complex fixing structures using a combination of various locking and clamping mechanisms. Although such fixing methods can meet the connection strength requirements, they make the disassembly and assembly of the hydrogen storage tank cumbersome—requiring the use of special tools for step-by-step operation, and the cooperation of multiple mechanisms is prone to problems such as jamming and wear, making it difficult to achieve rapid replacement of the hydrogen storage tank, which seriously restricts the operational continuity of hydrogen fuel cell drones. Utility Model Content

[0005] In view of this, this utility model proposes a connection structure between the tank and the storage tank in a solid hydrogen storage device to improve the convenience of disassembling and assembling the tank.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A connection structure between a tank and a storage bin in a solid-state hydrogen storage device includes a tank and a storage bin. The storage bin has an installation cavity adapted to the shape of the tank. The tank is axially inserted into the installation cavity. A connector seat is provided through the upper end of the storage bin. A tank connector is fixedly provided at the upper end of the tank and is circumferentially sealed within the connector seat. A storage bin base is fixedly provided at the lower end of the storage bin. The tank base is spirally disposed within the storage bin base. An axially telescopic locking push rod is fixedly provided on the outer wall of the storage bin. A mating part is provided at the upper end of the storage bin base. The locking push rod and the mating part are engaged in a circumferential locking / unlocking manner.

[0008] To better achieve the above technical solution, optionally, the inner wall of the tank base is provided with a first spiral groove and a second spiral groove, both of which are open at the bottom. The width of the first spiral groove is greater than the width of the second spiral groove. The outer wall of the tank base is fixedly provided with a first guide post and a second guide post at intervals. The first guide post and the first spiral groove, and the second guide post and the second spiral groove are simultaneously engaged with a damping spiral.

[0009] Optionally, the outer wall of the tank base is provided with a first spiral groove and a second spiral groove, both of which are open at the top. The width of the first spiral groove is greater than the width of the second spiral groove. The inner wall of the tank base is provided with a first guide post and a second guide post, and the first guide post and the first spiral groove, and the second guide post and the second spiral groove are simultaneously engaged with a damping spiral.

[0010] Optionally, the upper end face of the tank base is provided with a circumferentially extending arc hole, and the fitting component is a stop post fixedly installed on the upper end face of the tank base. The stop post is inserted into the arc hole and can move within the arc hole as the tank rotates. The locking push rod is located above one end of the arc hole, and the telescopic end of the locking push rod cooperates with the stop post in a side-blocking locking / separation unlocking manner.

[0011] Optionally, the outer wall of the tank is fixed with a position sensor for monitoring the stop column, and the locking push rod is an electric push rod, with the position sensor electrically connected to the electric push rod.

[0012] Optionally, the maximum unidirectional helical angle of the first guide post in the first helical groove and the maximum unidirectional helical angle of the second guide post in the second helical groove are both 90°.

[0013] The beneficial effects of this utility model are:

[0014] The connection structure between the tank and the storage tank in this solid-state hydrogen storage device achieves rapid axial positioning through a helical fit and convenient circumferential locking / unlocking through a locking push rod. The entire disassembly and assembly process requires no complex operations or special tools, simplifying the tank disassembly and assembly process and shortening the tank replacement time. At the same time, the damping characteristics of the helical fit and the constraint effect of the circumferential locking ensure the stability of the tank under conditions such as vibration and attitude changes. Combined with the sealing fit between the tank joint and the joint seat, it takes into account both the ease of disassembly and assembly and the structural reliability. It is especially suitable for scenarios that require rapid recharging and high-frequency replacement of hydrogen storage tanks, effectively improving the practical value and adaptability of solid-state hydrogen storage devices.

[0015] The connection structure between the tank and the storage chamber in this invention's solid-state hydrogen storage device only requires inserting the tank axially into the installation cavity of the storage chamber to achieve axial alignment of the gas outlet and the gas outlet channel, and connection between the first feed inlet and the second feed inlet. At the same time, through the double sealing of the first and second sealing rings with the inner wall of the gas outlet channel, an independent hydrogen output channel and material flow channel are formed. This structure does not require complex positioning components, which greatly reduces the requirements for insertion and removal accuracy, thereby reducing processing and assembly costs. Meanwhile, the double sealing design can effectively prevent hydrogen leakage and improve the system's sealing performance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the connection structure between the tank and the storage tank in a solid hydrogen storage device according to Embodiment 1 of this utility model;

[0017] Figure 2 yes Figure 1 A three-dimensional diagram from another angle;

[0018] Figure 3 yes Figure 1 A three-dimensional diagram from another angle;

[0019] Figure 4 yes Figure 2 A three-dimensional schematic diagram of the middle tank;

[0020] Figure 5 yes Figure 1 Cross-sectional view of the connection between the intermediate connector seat and the tank body connector;

[0021] Figure 6 This is a three-dimensional schematic diagram of the connection structure between the tank and the storage tank in a solid hydrogen storage device according to Embodiment 2 of this utility model;

[0022] Figure label:

[0023] Tank body 100, tank compartment 200, mounting cavity 210, tank body connector 300, air outlet 301, first sealing ring 302, second sealing ring 303, first feed inlet 304, connector seat 400, air outlet channel 401, second feed inlet 402, tank compartment base 500, arc hole 501, locking indicator 502, unlocking indicator 503, tank body base 600, stop post 601, rotating handle 602, position indicator 603, locking push rod 700, first spiral groove 801, second spiral groove 802, first guide post 803, second guide post 804, position sensor 900. Detailed Implementation

[0024] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Identical components are indicated by the same reference numerals.

[0025] Example 1

[0026] Please see Figures 1 to 5 This utility model discloses a connection structure between a tank and a storage tank in a solid hydrogen storage device, including a tank 100 and a storage tank 200. The storage tank 200 is provided with an installation cavity 210 that is adapted to the shape of the tank 100. The tank 100 is inserted into the installation cavity 210 along the axial direction. A connector seat 400 is provided through the upper end of the storage tank 200. A tank connector 300 is fixedly provided at the upper end of the tank 100. The tank connector 300 is circumferentially sealed and inserted into the connector seat 400.

[0027] A tank base 500 is fixedly installed at the lower end of the tank 200, and a tank base 600 is fixedly installed at the lower end of the tank body 100. The tank base 600 is spirally installed inside the tank base 500. A locking push rod 700 that extends and retracts along the axial direction is fixedly installed on the outer wall of the tank 200. A mating part is provided at the upper end of the tank base 600. The locking push rod 700 and the mating part are engaged in a circumferential locking / unlocking manner.

[0028] The connection structure between the tank and the storage tank in the solid hydrogen storage device according to this utility model embodiment is specifically achieved by the following methods: The tank 100 is axially inserted into the mounting cavity 210 using the spiral fit structure between the tank base 600 and the storage tank base 500. The axial constraint characteristics of the spiral structure form an axial limiting and positioning of the tank 100, preventing it from moving axially along the mounting cavity. Secondly, the locking push rod 700 fixed to the outer wall of the storage tank 200 forms a circumferential locking constraint with its telescopic end and the mating parts, restricting the tank 100 from rotating circumferentially along the mounting cavity. Thus, through the combined action of axial limiting and circumferential locking, a stable and reliable integrated locking structure is formed for the tank 100 inserted into the mounting cavity 210. The tank connector 300 and the connector seat 400 adopt a circumferential sealing insertion fit to achieve fluid sealing between them, ensuring fluid conduction between the internal and external pipelines of the tank 100 without leakage.

[0029] The connection structure between the tank and the storage tank in this embodiment of the solid hydrogen storage device achieves rapid axial positioning through a helical fit and convenient circumferential locking / unlocking through a locking push rod. The entire disassembly and assembly process requires no complex operations or special tools, simplifying the disassembly and assembly process of the tank 100 and shortening the replacement time of the tank 100. At the same time, the damping characteristics of the helical fit and the constraint effect of the circumferential locking ensure the stability of the tank 100 under conditions such as vibration and attitude changes. Combined with the sealing fit between the tank joint and the joint seat, it takes into account both the convenience of disassembly and assembly and the structural reliability. It is especially suitable for scenarios that require rapid recharging and high-frequency replacement of hydrogen storage tanks, effectively improving the practical value and adaptability of the solid hydrogen storage device.

[0030] like Figure 2 As shown, the inner wall of the tank base 500 is provided with a first spiral groove 801 and a second spiral groove 802, both of which are open at the bottom. The width of the first spiral groove 801 is greater than the width of the second spiral groove 802. The outer wall of the tank base 600 is fixedly provided with a first guide post 803 and a second guide post 804 at intervals. The first guide post 803 and the first spiral groove 801, and the second guide post 804 and the second spiral groove 802 are simultaneously engaged with a damping spiral.

[0031] Specifically, the diameter of the first guide post 803 is larger than that of the second guide post 804. The first guide post 803 and the first spiral groove 801, and the second guide post 804 and the second spiral groove 802 respectively form a damped spiral fit. The assembly condition is that the opening of the first spiral groove 801 and the first guide post 803, and the opening of the second spiral groove 802 and the second guide post 804 must be aligned at the same time so that they can be inserted into the corresponding spiral grooves respectively. Through the coordinated cooperation of the guide post and the spiral groove, the precise centering and insertion of the tank body 100 and the tank hopper 200 can be achieved.

[0032] like Figure 1As shown, the upper end face of the tank base 500 is provided with a circumferentially extending arc hole 501. The fitting part is a stop post 601 fixedly installed on the upper end face of the tank base 500. The stop post 601 is inserted into the arc hole 501 and can move within the arc hole 501 as the tank body 100 rotates. The locking push rod 700 is located above one end of the arc hole 501. The telescopic end of the locking push rod 700 cooperates with the stop post 601 in a side-blocking locking / separation unlocking manner.

[0033] Specifically, when the first guide post 803 and the second guide post 804 are screwed into the inner ends of the first spiral groove 801 and the second spiral groove 802 respectively, the stop post 601 moves synchronously with the tank body 100 to one end of the arc hole 501. At this time, the telescopic end of the locking push rod 700 extends and abuts against the side wall of the stop post 601 to achieve circumferential locking. When replacing the tank body 100, the telescopic end of the locking push rod 700 is retracted to release the constraint, and the tank body 100 can be rotated to detach it from the tank hopper 200.

[0034] like Figure 1 As shown, a position sensor 900 for monitoring the position of the stop post 601 is fixed on the outer wall of the tank 200. The locking push rod 700 is an electric push rod and is electrically connected to the position sensor 900. When the stop post 601 moves to the end of the arc hole 501 close to the position sensor 900, the position sensor 900 obtains the position signal of the stop post 601, and then controls the extension end of the electric push rod 700 to extend and abut against the side wall of the stop post 601, thereby realizing the circumferential locking of the stop post 601.

[0035] In this embodiment, the first guide post 803 and the second guide post 804 both have a maximum unidirectional helical angle of 90° in the first helical groove 801 and the second guide post 804 in the second helical groove 802.

[0036] like Figure 4 As shown, in this embodiment, the lower end face of the tank base 600 is provided with a position indicator 603, and the lower end face of the tank base 500 is provided with a locking indicator 502 and an unlocking indicator 503. The above indicators can help the operator quickly identify the insertion and alignment status of the tank 100, accurately judge the locking / unlocking status of the tank 100, and thus improve the assembly efficiency and alignment accuracy of the tank 100.

[0037] like Figure 2 As shown, in this embodiment, in order to facilitate the rotation of the tank 100, a rotating handle 602 is fixed in the radial direction on the lower end face of the tank base 600.

[0038] like Figure 5As shown, the connector seat 400 is provided with an air outlet channel 401 along the central axis, and the tank connector 300 is provided with an air outlet 301 extending into the tank body 100 along the central axis. The outer peripheral wall of the tank connector 300 is provided with a first sealing ring 302 and a second sealing ring 303 spaced vertically along the axial direction. The first sealing ring 302 and the second sealing ring 303 respectively seal and cooperate with the inner wall of the air outlet channel 401. The outer peripheral wall of the tank connector 300 is provided with a first feed inlet 304, which is located between the first sealing ring 302 and the second sealing ring 303 and communicates with the inside of the tank body 100. The connector seat 400 is provided with a second feed inlet 402 that communicates with the first feed inlet 304.

[0039] In this embodiment of the solid hydrogen storage device, the connection structure between the tank and the storage compartment only requires inserting the tank 100 axially into the mounting cavity 210 of the storage compartment 200 to achieve axial alignment of the gas outlet 301 and the gas outlet channel 401, and communication between the first feed inlet 304 and the second feed inlet 402. At the same time, through the double sealing of the first sealing ring 302 and the second sealing ring 303 with the inner wall of the gas outlet channel 401, an independent hydrogen output channel and material flow channel are formed. This structure does not require complex positioning components, which greatly reduces the requirements for insertion and removal accuracy, thereby reducing processing and assembly costs. At the same time, the double sealing design can effectively prevent hydrogen leakage and improve the system's sealing performance.

[0040] Specifically, the first sealing ring 302, the second sealing ring 303, the outer wall of the tank connector 300, and the inner wall of the connector seat 400 together form a liquid passage chamber. This liquid passage chamber is connected to the inside of the tank 100 through the first feed port 304 and to the external feed pipeline through the second feed port 402, realizing independent circulation of materials. Meanwhile, hydrogen enters the gas outlet channel 401 through the gas outlet 301, forming a hydrogen output path that is completely isolated from the material channel, avoiding mixing of hydrogen and materials and improving the safety of system operation.

[0041] In this embodiment, the venting channel 401 has a three-section stepped hole structure with progressively increasing diameter from top to bottom, including an upper section, a middle section, and a lower section. The first sealing ring 302 is sealed to the inner wall of the middle section of the venting channel 401, and the second sealing ring 303 is sealed to the inner wall of the lower section of the venting channel 401. The stepped hole structure can guide the insertion and removal stroke of the tank connector 300, reducing the difficulty of alignment during insertion. At the same time, the different diameter mating sections and corresponding sealing rings form a graded seal, further improving the sealing reliability.

[0042] In this embodiment, the lower and middle sections of the air outlet channel 401 are connected by a first conical surface, and the outlet end of the second feed inlet 402 is located on the first conical surface; the end of the tank connector 300 that mates with the connector seat 400 is a two-section stepped columnar structure, and the connection point of the two-section stepped columnar structure is a second conical surface; the inlet end of the first feed inlet 304 is located on the second conical surface; a gap is reserved between the inner wall of the air outlet channel 401 and the outer wall of the tank connector 300 to reduce frictional resistance during insertion and removal, and to facilitate quick replacement of the tank 100.

[0043] In this embodiment of the solid-state hydrogen storage device, the connection structure between the tank and the storage compartment, when replacing the tank 100, has the following safe depressurization process: When pulling the tank 100 outward, the second sealing ring 303 first separates from the lower inner wall of the gas outlet channel 401. At this time, the first sealing ring 302 still maintains a sealing fit with the middle inner wall of the gas outlet channel 401. The residual hydrogen gas inside the tank 100 can be slowly released through the gap formed by the first inlet 304, the lower section of the outer peripheral wall of the tank connector 300, and the lower end of the gas outlet channel 401, achieving primary depressurization; as the tank 100 continues to be pulled out, the first sealing ring 302 separates from the middle inner wall of the gas outlet channel 401, completing the complete removal of the tank 100. This step-by-step depressurization design can avoid the impact force generated by the instantaneous release of a large amount of residual gas, reduce the risk of the tank 100 falling off or the interface being damaged, and at the same time achieve safe hot-plugging under pressure without completely closing the system main valve, improving replacement efficiency.

[0044] Example 2

[0045] like Figure 6 As shown, this embodiment is similar to embodiment 1, except that: the outer wall of the tank base 600 is provided with a first spiral groove 801 and a second spiral groove 802, both of which are open at the top. The width of the first spiral groove 801 is greater than the width of the second spiral groove 802. The inner wall of the tank base 500 is provided with a first guide post 803 and a second guide post 804. The first guide post 803 and the first spiral groove 801, and the second guide post 804 and the second spiral groove 802 are simultaneously equipped with a damping spiral.

[0046] Specifically, compared with Embodiment 1, in this embodiment, the first guide post 803 and the second guide post 804 are disposed on the tank base 500, and the first spiral groove 801 and the second spiral groove 802 are disposed on the tank base 600, and both are open-top structures. The connection structure between the tank and the storage tank in the solid hydrogen storage device of this embodiment is used in the same way as in Embodiment 1, and will not be described in detail here.

[0047] The technical solution of this utility model has been described in detail above with reference to specific embodiments. The specific embodiments described are used to help understand the concept of this utility model. Derivations and modifications made by those skilled in the art based on the specific embodiments of this utility model also fall within the protection scope of this utility model.

Claims

1. A connection structure between a tank and a storage bin in a solid hydrogen storage device, comprising a tank (100) and a storage bin (200), wherein the storage bin (200) is provided with a mounting cavity (210) adapted to the shape of the tank (100), and the tank (100) is axially inserted into the mounting cavity (210), characterized in that: A connector seat (400) is provided through the upper end of the tank (200), and a tank body connector (300) is fixedly provided at the upper end of the tank body (100). The tank body connector (300) is circumferentially sealed and inserted into the connector seat (400). The lower end of the tank compartment (200) is fixedly provided with a tank compartment base (500), and the lower end of the tank body (100) is fixedly provided with a tank body base (600). The tank body base (600) is spirally disposed inside the tank compartment base (500). The outer wall of the tank (200) is fixed with a locking push rod (700) that extends and retracts along the axis. The upper end of the tank base (600) is provided with a mating part. The locking push rod (700) and the mating part are engaged in a circumferential locking / unlocking manner.

2. The connecting structure of the tank and the tank house in the solid-state hydrogen storage device according to claim 1, characterized in that, The inner wall of the tank base (500) is provided with a first spiral groove (801) and a second spiral groove (802) that are both open at the bottom. The width of the first spiral groove (801) is greater than the width of the second spiral groove (802). The outer wall of the tank base (600) is fixedly provided with a first guide post (803) and a second guide post (804) at intervals. The first guide post (803) and the first spiral groove (801) and the second guide post (804) and the second spiral groove (802) are simultaneously in a damped spiral engagement.

3. The connection structure between the tank and the storage bin in a solid hydrogen storage device according to claim 1, characterized in that, The outer wall of the tank base (600) is provided with a first spiral groove (801) and a second spiral groove (802) that are both open at the top. The width of the first spiral groove (801) is greater than the width of the second spiral groove (802). The inner wall of the tank base (500) is provided with a first guide post (803) and a second guide post (804) that are open at the top. The first guide post (803) and the first spiral groove (801) and the second guide post (804) and the second spiral groove (802) are simultaneously engaged with a damping spiral.

4. The connection structure between the tank and the storage bin in a solid hydrogen storage device according to claim 2 or 3, characterized in that, The upper end face of the tank base (500) is provided with a circumferentially extending arc hole (501). The fitting component is a stop post (601) fixedly installed on the upper end face of the tank base (500). The stop post (601) is inserted into the arc hole (501) and can move within the arc hole (501) as the tank body (100) rotates. The locking push rod (700) is located above one end of the arc hole (501). The telescopic end of the locking push rod (700) cooperates with the stop post (601) in a side-blocking locking / separation unlocking manner.

5. The connection structure between the tank and the storage bin in a solid hydrogen storage device according to claim 4, characterized in that, The outer wall of the tank (200) is fixed with a position sensor (900) for monitoring the stop column (601), and the locking push rod (700) is an electric push rod. The position sensor (900) is electrically connected to the locking push rod (700).

6. The connecting structure of the tank and the tank house in the solid-state hydrogen storage device according to claim 2, wherein, The first guide post (803) has a maximum unidirectional helical angle of 90° in the first helical groove (801) and the second guide post (804) has a maximum unidirectional helical angle of 90° in the second helical groove (802).

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