Hydrogen storage tank with replaceable heat-conducting structure

Abstract

The present invention discloses a hydrogen storage tank with a replaceable heat-conducting structure, which belongs to the field of hydrogen storage technology. The hydrogen storage tank with a replaceable heat-conducting structure includes a tank body, a valve, a gas-conducting rod, a fixing ring and a heat-conducting part. A tank mouth is provided on the top of the tank body; the valve is detachably provided on the tank mouth; the gas-conducting rod is provided inside the tank body; the number of fixing rings is at least two, and at least two fixing rings are movably sleeved on the gas-conducting rod, and the outer diameter of the fixing ring is smaller than the inner diameter of the tank mouth; the heat-conducting part is provided between two adjacent fixing rings, and includes a plurality of telescopic heat-conducting frames arranged circumferentially around the fixing rings; the two adjacent fixing rings can be close to each other, so that the plurality of telescopic heat-conducting frames can be extended outward to abut against the inner wall of the tank body; the two adjacent fixing rings can also be moved away from each other, so that the plurality of telescopic heat-conducting frames can be contracted inward until the outer diameter of the heat-conducting part is smaller than the inner diameter of the tank mouth. The hydrogen storage tank disclosed by the present invention can disassemble and replace the heat-conducting structure inside the hydrogen storage tank as needed, so as to facilitate the subsequent maintenance of the hydrogen storage tank.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage, and in particular to a hydrogen storage tank with a replaceable heat-conducting structure. Background Art

[0002] Solid-state hydrogen storage technology has the characteristics of high hydrogen storage density, low hydrogen storage pressure, and high safety, and is one of the important development directions of hydrogen energy storage and transportation. When the hydrogen storage alloy absorbs hydrogen, it needs to quickly transfer the heat in the hydrogen storage tank to the outside of the hydrogen storage tank; when the hydrogen storage alloy releases hydrogen, it needs to absorb heat from the outside of the hydrogen storage tank. Therefore, the heat transfer performance in the tank is one of the important factors affecting the overall performance of the hydrogen storage tank.

[0003] At present, most hydrogen storage tanks use a method of mixing thermal conductors (copper wire, aluminum wire, aluminum foil, etc.) and hydrogen storage alloys and then filling them into the tank to improve the heat transfer performance of the hydrogen storage tank. However, this method cannot guarantee the uniformity between the hydrogen storage alloy and the thermal conductor after filling, resulting in a decrease in the overall heat transfer performance of the hydrogen storage tank; and this method has a complicated filling process, which affects the efficiency of production and preparation.

[0004] In order to solve the problem that the uniformity between the hydrogen storage alloy and the thermal conductor in the hydrogen storage tank cannot be guaranteed, a Chinese invention patent with patent number CN108131563A provides a metal hydride hydrogen storage tank with a spiral structure. By setting a spiral structure in the hydrogen storage tank to transfer heat and support the hydrogen storage alloy powder, the hydrogen storage alloy powder is evenly distributed on the spiral structure, thereby improving the heat transfer performance of the hydrogen storage tank. However, in order to maintain contact with the inner wall of the hydrogen storage tank, the outer diameter of the spiral structure in the patent needs to be set to be larger than the inner diameter of the tank mouth of the hydrogen storage tank. During subsequent use, once the spiral structure is damaged, it is difficult to replace and maintain the spiral structure.

[0005] There is currently no effective technical solution to the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a hydrogen storage tank with a replaceable heat-conducting structure, which can be disassembled and replaced in the hydrogen storage tank as needed, so as to facilitate the subsequent maintenance of the hydrogen storage tank.

[0007] In a first aspect, the present invention provides a hydrogen storage tank with a replaceable heat-conducting structure, comprising:

[0008] A tank body with a tank opening at the top;

[0009] A gas guide rod is arranged in the tank body;

[0010] A valve, detachably disposed on the tank opening;

[0011] At least two fixing rings are movably sleeved on the gas guide rod, and the outer diameter of the fixing ring is smaller than the inner diameter of the tank opening, so that the fixing ring can be separated from the tank body through the tank opening;

[0012] The heat-conducting part is arranged between two adjacent fixing rings, and the heat-conducting part includes a plurality of telescopic heat-conducting frames, which are arranged circumferentially around the fixing ring at intervals; the two adjacent fixing rings can be close to each other so that the plurality of telescopic heat-conducting frames can extend outward to abut against the inner wall of the tank body; the two adjacent fixing rings can also be away from each other so that the plurality of telescopic heat-conducting frames can shrink inward until the outer diameter of the heat-conducting part is smaller than the inner diameter of the tank mouth.

[0013] The hydrogen storage tank with replaceable heat-conducting structure provided by the present invention is characterized by movably sleeved a fixing ring on the gas guide rod and providing a heat-conducting part between two fixing rings. Therefore, when the fixing ring located at the bottom abuts against the bottom of the tank body, the fixing rings in the tank body can be brought close to each other by squeezing the fixing ring close to the tank mouth. The two fixing rings close to each other can apply pressure to the opposite ends of the telescopic heat-conducting frame, thereby driving the telescopic heat-conducting frame to extend outward relative to the fixing ring until it abuts against the inner wall of the tank body. At this time, the telescopic heat-conducting frame can realize heat transfer between the tank wall and the interior of the tank body. In addition, when the heat-conducting structure needs to be maintained or replaced, the gas guide rod can be pulled out of the tank body first, and then the support rod and the hook rod can be extended to apply pulling forces in opposite directions to the two fixing rings (the support rod holds the fixing ring near the bottom and applies downward force, and the hook rod hooks the fixing ring near the tank mouth and applies upward force), driving the two fixing rings away from each other, so that the telescopic heat-conducting frame shrinks inward relative to the fixing ring until the outer diameter of the heat-conducting part is smaller than the inner diameter of the tank mouth. At this time, the fixing ring and the heat-conducting part are pulled toward the tank mouth to complete the replacement of the heat-conducting structure composed of the fixing ring and the heat-conducting part in the hydrogen storage tank, which is convenient for subsequent maintenance of the hydrogen storage tank.

[0014] Furthermore, the telescopic heat-conducting frame includes a first heat-conducting rod and a second heat-conducting rod, the first heat-conducting rod is rotatably connected to one of the two fixing rings close to the tank mouth, the second heat-conducting rod is rotatably connected to one of the two fixing rings far from the tank mouth, and the first heat-conducting rod and the second heat-conducting rod are rotatably connected.

[0015] By adopting the above technical solution, the telescopic heat-conducting frame is provided with a first heat-conducting rod and a second heat-conducting rod. When the two fixing rings are close to each other, the first heat-conducting rod and the second heat-conducting rod can be rotated relative to the fixing ring to expand outward; when the two fixing rings are away from each other, the first heat-conducting rod and the second heat-conducting rod can be rotated relative to the fixing ring to contract inward.

[0016] Furthermore, the first heat-conducting rod includes a first end and a second end, the first end is rotatably connected to the fixing ring, the second end is used to abut against the inner wall of the tank body, and the second end is located on the side of the first end facing away from the tank mouth; the second heat-conducting rod is rotatably connected between the first end and the second end.

[0017] By adopting the above technical solution, the second heat-conducting rod is rotatably connected between the first end and the second end. When the two fixing rings are away from each other, the second end will abut against the second heat-conducting rod, thereby limiting the rotation angle of the first heat-conducting rod and the second heat-conducting rod, so that the telescopic heat-conducting frame will not be contracted inwardly to contact with the gas-conducting rod under the force; when the two fixing rings are close to each other, the first heat-conducting rod and the second heat-conducting rod can only extend outward, which is convenient for the telescopic heat-conducting frame to extend in the tank. In addition, since the second end is located on the side of the first end facing away from the tank mouth, and the end point of the first end is always fixed on the fixing ring close to the tank mouth, when the fixing ring is pulled away from the tank mouth, the end point of the first end can be separated from the tank mouth with the fixing ring, and the fixing ring is continuously pulled, and the pulling force will be converted by the side wall of the tank mouth into a tightening force applied to the first heat-conducting rod to drive the first heat-conducting rod and the second heat-conducting rod to rotate relative to each other to contract inward, and drive the two adjacent fixing rings of the telescopic heat-conducting frame to move away from each other, without the need to use the support rod to apply force downward to the fixing ring near the bottom, so as to facilitate the replacement of the heat-conducting structure.

[0018] Furthermore, the first heat-conducting rod is provided with a receiving groove penetrating the second end portion, the opening of the receiving groove faces the gas-conducting rod, the second heat-conducting rod is rotatably connected to the receiving groove, and the second heat-conducting rod can be rotated relative to the first heat-conducting rod until partially or completely received in the receiving groove.

[0019] By adopting the above technical solution, the second heat-conducting rod is rotatably connected to the storage groove, so that the second heat-conducting rod can be partially or completely stored in the storage groove. When the second heat-conducting rod is partially or completely stored in the storage groove, the length extension direction of the first heat-conducting rod and the second heat-conducting rod is parallel to the axial direction of the fixing ring, and the outer diameter of the telescopic heat-conducting frame can be contracted to be consistent with the fixing ring, so that the heat-conducting structure can be replaced conveniently.

[0020] Furthermore, an annular groove is provided on the side of the fixing ring, and a connecting shaft ring is provided in the annular groove; the fixing ring is also provided with a plurality of connecting notches arranged at circumferential intervals, and the connecting notches are all connected to the annular groove, and the number of the connecting notches is consistent with the number of the telescopic heat-conducting frames, and the connecting notches are used for the first heat-conducting rod and / or the second heat-conducting rod to be rotatably connected to the connecting shaft ring.

[0021] By adopting the above technical solution, by setting a connecting shaft ring, multiple first heat-conducting rods and / or second heat-conducting rods can be rotatably connected to the fixed ring through a connecting shaft ring, which helps to ensure that multiple first heat-conducting rods and / or second heat-conducting rods extend outward and contract inward with the axis of the fixed ring as the center, thereby ensuring that each first heat-conducting rod can abut against the inner wall of the tank body when extending outward, thereby improving the heat transfer performance of the hydrogen storage tank. In addition, a connecting shaft ring realizes the rotatable connection of multiple first heat-conducting rods and / or second heat-conducting rods with the fixed ring, which is convenient for production and processing, and helps to improve the production and preparation efficiency of the heat-conducting structure.

[0022] Furthermore, the number of the heat conducting parts is N, the number of the fixing rings is greater than or equal to N+1, the N heat conducting parts and the N+1 fixing rings are arranged at intervals along the axial direction of the gas guide rod, and N is a positive integer.

[0023] Furthermore, one of all the fixing rings closest to the tank mouth is provided with a grip rod, and the grip rod is provided on the side of the fixing ring facing the tank mouth, and the outer diameter of the grip rod is smaller than the inner diameter of the tank mouth. When the telescopic heat-conducting frame extends outward relative to the fixing ring until it abuts against the inner wall of the tank body, the valve can apply pressure to the grip rod to keep the telescopic heat-conducting frame abutting against the inner wall of the tank body.

[0024] By adopting the above technical solution, applying pressure to the gripping rod through the valve helps to keep the telescopic heat-conducting frame in the extended state in the tank, ensuring the contact between the telescopic heat-conducting frame and the inner wall of the tank, thereby improving the heat transfer stability of the hydrogen storage tank. In addition, when replacing the heat-conducting structure, the gripping rod can also provide a force point for pulling the fixing ring, making it easier to replace the heat-conducting structure.

[0025] Furthermore, it also includes an extension rod, which is arranged between two adjacent fixing rings.

[0026] Furthermore, the fixing rings are all provided with a polygonal hole penetrating the axis, and the polygonal hole is used for inserting a polygonal wrench to drive the fixing ring to rotate around the axis.

[0027] By adopting the above technical solution, a polygonal hole is provided on the fixing ring (the polygonal hole may be a pentagonal hole, a hexagonal hole, etc.), and a corresponding polygonal wrench (pentagonal wrench, hexagonal wrench, etc.) is inserted into the polygonal hole. Rotating the polygonal wrench can drive the fixing ring to rotate, thereby stirring the hydrogen storage alloy in the tank body, which helps to ensure the uniformity of the hydrogen storage alloy in the tank body after filling.

[0028] Furthermore, the tank mouth, the air guide rod and the fixing ring are coaxially arranged.

[0029] As can be seen from the above, the hydrogen storage tank with replaceable heat-conducting structure provided by the present invention is achieved by movably sleeved a fixing ring on the gas guide rod and providing a heat-conducting part between two fixing rings. Therefore, when the fixing ring located at the bottom abuts against the bottom of the tank body, the fixing rings in the tank body can be made close to each other by squeezing the fixing ring close to the tank mouth. The two fixing rings close to each other can apply pressure to the opposite ends of the telescopic heat-conducting frame, thereby driving the telescopic heat-conducting frame to extend outward relative to the fixing ring until it abuts against the inner wall of the tank body. At this time, the telescopic heat-conducting frame can realize heat transfer between the tank wall and the interior of the tank body. In addition, when the heat-conducting structure needs to be maintained or replaced, the gas guide rod can be pulled out of the tank body first, and then the support rod and the hook rod can be extended to apply pulling forces in opposite directions to the two fixing rings (the support rod holds the fixing ring near the bottom and applies downward force, and the hook rod hooks the fixing ring near the tank mouth and applies upward force), driving the two fixing rings away from each other, so that the telescopic heat-conducting frame shrinks inward relative to the fixing ring until the outer diameter of the heat-conducting part is smaller than the inner diameter of the tank mouth. At this time, the fixing ring and the heat-conducting part are pulled toward the tank mouth to complete the replacement of the heat-conducting structure composed of the fixing ring and the heat-conducting part in the hydrogen storage tank, which is convenient for subsequent maintenance of the hydrogen storage tank.

[0030] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a hydrogen storage tank with a replaceable heat-conducting structure proposed by the present invention.

[0032] Figure 2 for Figure 1 Schematic diagram of the exploded structure of a hydrogen storage tank with a replaceable medium heat-conducting structure.

[0033] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of a hydrogen storage tank with a replaceable medium heat-conducting structure.

[0034] Figure 4 for Figure 2 Partially exploded diagram of the telescopic heat conducting frame and the fixing ring.

[0035] Figure 5 for Figure 2 Schematic diagram of the structure of the telescopic heat-conducting frame in the extended state.

[0036] Figure 6 for Figure 5 Schematic diagram of the structure of the telescopic heat-conducting frame in the contracted state.

[0037] In the accompanying drawings: 100, tank body; 110, tank mouth; 200, valve; 300, air guide rod; 400, fixing ring; 410, annular groove; 411, connecting shaft ring; 420, connecting notch; 430, grip rod; 440, polygonal hole; 500, telescopic heat-conducting frame; 510, first heat-conducting rod; 511, first end; 512, second end; 513, storage groove; 520, second heat-conducting rod; 600, heat-conducting part; 610, first rotating hole; 620, second rotating hole; 630, third rotating hole; 640, fourth rotating hole; 650, rotating plug shaft; 700, extension rod. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0040] The present invention discloses a hydrogen storage tank with a replaceable heat-conducting structure, which is mainly used to store hydrogen storage alloys. Since the hydrogen storage alloys need to exchange heat with the outside when absorbing and releasing hydrogen, the heat transfer performance in the tank is one of the important factors affecting the overall performance of the hydrogen storage tank. However, existing hydrogen storage tanks either cannot guarantee the uniformity between the hydrogen storage alloy and the heat conductor after filling, or cannot replace and repair the heat-conducting structure. The hydrogen storage tank of the present invention can ensure uniform heat conduction while also replacing and maintaining the heat-conducting structure, which is convenient for subsequent maintenance of the hydrogen storage tank.

[0041] Reference Figure 1 , Attachment Figure 2 , Attachment Figure 3In one embodiment, a hydrogen storage tank with a replaceable heat-conducting structure includes a tank body 100 , a valve 200 , a gas guide rod 300 , a fixing ring 400 and a heat-conducting part 600 . A tank mouth 110 is provided on the top of the tank body 100; a valve 200 is detachably arranged on the tank mouth 110; an air guide rod 300 is arranged inside the tank body 100; there are at least two fixing rings 400, and at least two fixing rings 400 are movably sleeved on the air guide rod 300, and the outer diameter of the fixing ring 400 is smaller than the inner diameter of the tank mouth 110, so that the fixing ring 400 can be separated from the tank body 100 through the tank mouth 110; a heat-conducting part 600 is arranged between two adjacent fixing rings 400, and the heat-conducting part 600 includes a plurality of telescopic heat-conducting frames 500, and the plurality of telescopic heat-conducting frames 500 are circumferentially spaced around the fixing rings 400; two adjacent fixing rings 400 can approach each other, so that the plurality of telescopic heat-conducting frames 500 extend outward to abut against the inner wall of the tank body 100; two adjacent fixing rings 400 can also move away from each other, so that the plurality of telescopic heat-conducting frames 500 shrink inward until the outer diameter of the heat-conducting part 600 is smaller than the inner diameter of the tank mouth.

[0042] It is worth noting that the telescopic heat-conducting frame 500 and the fixing ring can be made of metal materials with good thermal conductivity such as copper and aluminum.

[0043] As can be seen from the above, the hydrogen storage tank with replaceable heat-conducting structure provided by the present invention is achieved by movably sleeved the fixing ring 400 on the gas guide rod 300 and setting the heat-conducting part 600 between the two fixing rings 400. Therefore, when the fixing ring 400 located at the bottom abuts against the bottom of the tank body 100, the fixing rings in the tank body 100 can be made close to each other by squeezing the fixing ring 400 close to the tank mouth 110. The two fixing rings 400 close to each other can apply pressure to the opposite ends of the telescopic heat-conducting frame 500, thereby driving the telescopic heat-conducting frame 500 to extend outward relative to the fixing ring until it abuts against the inner wall of the tank body 100. At this time, the telescopic heat-conducting frame 500 can realize heat transfer between the tank wall and the interior of the tank body 100. In addition, when the heat-conducting structure needs to be maintained or replaced, the gas guide rod 300 can be first pulled out of the tank body 100, and then the support rod and the hook rod (not shown) can be extended to apply pulling forces in opposite directions to the two fixing rings 400 (the support rod presses against the fixing ring near the bottom to apply downward force, and the hook rod hooks the fixing ring near the tank mouth to apply upward force), driving the two fixing rings 400 away from each other, so that the telescopic heat-conducting frame 500 shrinks inward relative to the fixing ring 400 until the outer diameter of the heat-conducting part 600 is smaller than the inner diameter of the tank mouth 110. At this time, the fixing ring 400 and the heat-conducting part 600 are pulled toward the tank mouth to complete the replacement of the heat-conducting structure composed of the fixing ring 400 and the heat-conducting part 600 in the hydrogen storage tank, which is convenient for subsequent maintenance of the hydrogen storage tank.

[0044] In one embodiment, the gas guide rod 300 is a hollow stainless steel sintered filter rod, and the gas guide rod 300 is connected to the valve 200, which can filter the hydrogen storage alloy powder to ensure that hydrogen flows smoothly in the hydrogen storage alloy powder. The setting of the gas guide rod 300 can effectively increase the gas filtration area, improve gas fluidity, and has a certain effect of increasing heat transfer.

[0045] In one of the embodiments, one of all the fixing rings 400 that is closest to the tank mouth 110 is provided with a grip rod 430, and the grip rod 430 is provided on the side of the fixing ring 400 facing the tank mouth 110, and the outer diameter of the grip rod 430 is smaller than the inner diameter of the tank mouth 110. When the telescopic heat-conducting frame 500 extends outward relative to the fixing ring 400 until it abuts against the inner wall of the tank body 100, the valve 200 can apply pressure to the grip rod 430 to keep the telescopic heat-conducting frame 500 abutting against the inner wall of the tank body 100.

[0046] By adopting the above technical solution, applying pressure to the gripping rod 430 through the valve 200 helps to maintain the telescopic heat-conducting frame 500 in the extended state in the tank, ensuring the abutment between the telescopic heat-conducting frame 500 and the inner wall of the tank body 100, thereby improving the heat transfer stability of the hydrogen storage tank. In addition, when replacing the heat-conducting structure, the gripping rod 430 can also provide a force point for pulling the fixing ring 400, making it convenient to replace the heat-conducting structure.

[0047] In one embodiment, an extension rod 700 is further included. The extension rod 700 is disposed between the two fixing rings 400 .

[0048] In one embodiment, the tank opening 110 , the gas guide rod 300 and the fixing ring 400 are coaxially arranged.

[0049] Reference Figure 4 In one embodiment, the telescopic heat-conducting frame 500 includes a first heat-conducting rod 510 and a second heat-conducting rod 520. The first heat-conducting rod 510 is rotatably connected to one of the two fixing rings 400 that is closer to the tank mouth 110, and the second heat-conducting rod 520 is rotatably connected to one of the two fixing rings 400 that is farther from the tank mouth 110. The first heat-conducting rod 510 and the second heat-conducting rod 520 are rotatably connected.

[0050] By adopting the above technical solution, the telescopic heat-conducting frame 500 is provided with a first heat-conducting rod 510 and a second heat-conducting rod 520. When the two fixing rings 400 are close to each other, the first heat-conducting rod 510 and the second heat-conducting rod 520 can rotate relative to the fixing ring 400 to expand outward (such as the attached Figure 5 When the two fixing rings 400 are away from each other, the first heat-conducting rod 510 and the second heat-conducting rod 520 can rotate relative to the fixing ring 400 to shrink inwards (as shown in the attached Figure 6 as shown).

[0051] Continue to refer to the attached Figure 4In one embodiment, the first heat-conducting rod 510 includes a first end 511 and a second end 512, the first end 511 is rotatably connected to the fixing ring 400, the second end 512 is used to abut against the inner wall of the tank body 100, and the second end 512 is located on the side of the first end 511 facing away from the tank mouth 110; the second heat-conducting rod 520 is rotatably connected between the first end 511 and the second end 512.

[0052] By adopting the above technical solution, the second heat-conducting rod 520 is rotatably connected between the first end 511 and the second end 512. When the two fixing rings 400 move away from each other, the second end 512 will abut against the second heat-conducting rod 520, thereby limiting the rotation angle of the first heat-conducting rod 510 and the second heat-conducting rod 520, so that the telescopic heat-conducting frame 500 will not be forced to shrink inward to contact the gas-conducting rod 300; when the two fixing rings 400 approach each other, the first heat-conducting rod 510 and the second heat-conducting rod 520 can only extend outward, so as to facilitate the extension of the telescopic heat-conducting frame 500 in the tank. In addition, since the second end portion 512 is located on the side of the first end portion 511 facing away from the tank mouth 110, and the endpoint of the first end portion 511 is always fixed on the fixing ring 400 near the tank mouth 110, when the fixing ring 400 is pulled away from the tank mouth 110, the endpoint of the first end portion 511 can be separated from the tank mouth along with the fixing ring 400, and the fixing ring 400 is continuously pulled, and the pulling force will be converted by the side wall of the tank mouth 110 into a tightening force applied to the first heat-conducting rod 510 to drive the first heat-conducting rod 510 and the second heat-conducting rod 520 to rotate relative to each other and shrink inward, and drive the two adjacent fixing rings 400 of the telescopic heat-conducting frame 500 to move away from each other, and there is no need to use a support rod to apply downward force to the fixing ring 400 near the bottom, thereby facilitating the replacement of the heat-conducting structure.

[0053] In one embodiment, the first heat-conducting rod 510 is provided with a receiving groove 513 that passes through the second end 512, and the opening of the receiving groove 513 faces the air guide rod 300. The second heat-conducting rod 520 is rotatably connected to the receiving groove 513. The second heat-conducting rod 520 can be rotated relative to the first heat-conducting rod 510 until it is partially or completely received in the receiving groove 513.

[0054] By adopting the above technical solution, the second heat-conducting rod 520 is rotatably connected to the receiving groove 513, so that the second heat-conducting rod 520 can be partially or completely received in the receiving groove 513. When the second heat-conducting rod 520 is partially or completely received in the receiving groove 513, the length extension direction of the first heat-conducting rod 510 and the second heat-conducting rod 520 is parallel to the axial direction of the fixing ring 400, and the outer diameter of the telescopic heat-conducting frame 500 can be contracted to be consistent with the fixing ring 400, so that the heat-conducting structure can be replaced conveniently.

[0055] In one embodiment, a ring groove 410 is provided on the side of the fixing ring 400, and a connecting shaft ring 411 is provided in the ring groove 410; the fixing ring 400 is also provided with a plurality of connecting notches 420 arranged at circumferential intervals, and the connecting notches 420 are all connected to the ring groove 410. The number of the connecting notches 420 is consistent with the number of the telescopic heat-conducting frame 500, and the connecting notches 420 are used for the first heat-conducting rod 510 and / or the second heat-conducting rod 520 to be rotatably connected to the connecting shaft ring 411.

[0056] By adopting the above technical solution, by setting the connecting shaft ring 411, multiple first heat-conducting rods 510 and / or second heat-conducting rods 520 can be rotatably connected to the fixing ring 400 through a connecting shaft ring 411, which helps to ensure that multiple first heat-conducting rods 510 and / or second heat-conducting rods 520 extend outward and contract inward with the axis of the fixing ring 400 as the center, thereby ensuring that each first heat-conducting rod 510 can abut against the inner wall of the tank body 100 when extending outward, thereby improving the heat transfer performance of the hydrogen storage tank. In addition, a connecting shaft ring 411 realizes the rotatable connection of multiple first heat-conducting rods 510 and / or second heat-conducting rods 520 with the fixing ring 400, which is convenient for production and processing, and helps to improve the production and preparation efficiency of the heat-conducting structure.

[0057] In one embodiment, the first heat-conducting rod 510 is provided with a first rotating hole 610 and a second rotating hole 620, and the second heat-conducting rod 520 is provided with a third rotating hole 630 and a fourth rotating hole 640. The first rotating hole 610 and the third rotating hole 630 are respectively used for allowing the connecting shaft rings 411 on the two fixing rings 400 to pass through, so as to realize the rotational connection between the first heat-conducting rod 510 and the second heat-conducting rod 520 and the fixing ring 400; the second rotating hole 620 and the fourth rotating hole 640 are used for the rotating plug shaft 650 to pass through, so as to realize the rotational connection between the first heat-conducting rod 510 and the second heat-conducting rod 520.

[0058] In one embodiment, the number of heat conducting parts 600 is N, the number of fixing rings 400 is greater than or equal to N+1, and N heat conducting parts 600 and N+1 fixing rings 400 are arranged at intervals along the axial direction of the gas guide rod 300, where N is a positive integer. For example, the number of heat conducting parts 600 may be 4, and in an embodiment where the extension rod 700 is not provided, the number of fixing rings 400 is set to 5; in an embodiment where the extension rod 700 is provided, the number of fixing rings 400 needs to be set to 6 (as shown in the attached figure). Figure 3 as shown).

[0059] In one embodiment, the fixing ring 400 is provided with a polygonal hole 440 penetrating the axis, and the polygonal hole 440 is used for inserting a polygonal wrench to drive the fixing ring 400 to rotate around the axis.

[0060] By adopting the above technical solution, a polygonal hole 440 (the polygonal hole can be a pentagonal hole, a hexagonal hole, etc.) is set on the fixing ring 400. By inserting a corresponding polygonal wrench (pentagonal wrench, hexagonal wrench, etc.) into the polygonal hole 440, rotating the polygonal wrench can drive the fixing ring 400 to rotate, thereby stirring the hydrogen storage alloy in the tank body 100, which helps to ensure the uniformity of the hydrogen storage alloy in the tank body 100 after filling.

[0061] The present invention also provides a method for preparing a hydrogen storage tank with a replaceable heat-conducting structure, comprising:

[0062] Step 1: driving the two fixing rings 400 provided with the telescopic heat-conducting frame 500 away from each other, so that the telescopic heat-conducting frame 500 is retracted inwardly until the outer diameter of the heat-conducting part 600 is smaller than the inner diameter of the tank mouth, thereby placing the heat-conducting structure composed of the heat-conducting part 600 and the fixing ring 400 into the tank body;

[0063] Step 2: driving the two fixing rings 400 provided with the telescopic heat-conducting frame 500 in the tank to approach each other, so that the telescopic heat-conducting frame 500 expands outward relative to the fixing rings 400 until it abuts against the inner wall of the tank body 100;

[0064] Step 3: Insert the gas guide rod 300 through the axis of the fixing ring 400 into the tank body 100, and then fill the tank body 100 with hydrogen storage alloy.

[0065] Step 4: Thread the valve 200 onto the tank mouth of the tank body 100 to complete the preparation of the hydrogen storage tank.

[0066] From the above, it can be seen that the preparation method of the hydrogen storage tank with a replaceable thermal conductive structure provided by the present invention has a simple filling process, which helps to save production time and labor costs, thereby improving production capacity and reducing costs; in addition, the hydrogen storage tank obtained by the preparation method has a thermal conductive structure that can be replaced at any time, which is convenient for subsequent tank maintenance.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0068] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A hydrogen storage tank with a replaceable heat-conducting structure, characterized in that: include: A tank body (100) having a tank opening (110) at the top; A valve (200) detachably disposed on the tank opening (110); An air guide rod (300) is arranged in the tank body (100); at least two fixing rings (400) movably sleeved on the gas guide rod (300), the outer diameter of the fixing ring (400) being smaller than the inner diameter of the tank opening (110), so that the fixing ring (400) can be separated from the tank body (100) through the tank opening (110); The heat conducting part (600) is arranged between two adjacent fixing rings (400), and the heat conducting part (600) comprises a plurality of telescopic heat conducting frames (500), and the plurality of telescopic heat conducting frames (500) are arranged at intervals in the circumferential direction around the fixing ring (400); the two adjacent fixing rings (400) can be close to each other so that the plurality of telescopic heat conducting frames (500) can be extended outwards to abut against the inner wall of the tank body (100); the two adjacent fixing rings (400) can also be far away from each other so that the plurality of telescopic heat conducting frames (500) can be extended outwards to abut against the inner wall of the tank body (100); The heat frame (500) is retracted inwardly until the outer diameter of the heat conducting part (600) is smaller than the inner diameter of the can mouth; the telescopic heat conducting frame (500) comprises a first heat conducting rod (510) and a second heat conducting rod (520), the first heat conducting rod (510) being rotatably connected to one of the two fixing rings (400) closer to the can mouth (110), the second heat conducting rod (520) being rotatably connected to one of the two fixing rings (400) farther from the can mouth (110), the first heat conducting rod (510) and the second heat conducting rod (520) being rotatably connected to one of the two fixing rings (400) farther from the can mouth (110), The heat-conducting rod (520) is rotatably connected; an annular groove (410) is provided on the side of the fixing ring (400), and a connecting shaft ring (411) is provided in the annular groove (410); the fixing ring (400) is also provided with a plurality of connecting notches (420) arranged at intervals in the circumferential direction, and the connecting notches (420) are used for allowing the first heat-conducting rod (510) and the second heat-conducting rod (520) to be rotatably connected to the connecting shaft ring (411); the one of all the fixing rings (400) closest to the tank mouth (110) A gripping rod (430) is provided, the gripping rod (430) being provided on a side of the fixing ring (400) facing the tank mouth (110), the outer diameter of the gripping rod (430) being smaller than the inner diameter of the tank mouth (110), and when the telescopic heat-conducting frame (500) extends outward relative to the fixing ring (400) until it abuts against the inner wall of the tank body (100), the valve (200) can apply pressure to the gripping rod (430) so that the telescopic heat-conducting frame (500) remains in abutment with the inner wall of the tank body (100).

2. A hydrogen storage tank with a replaceable heat-conducting structure according to claim 1, characterized in that: The first heat-conducting rod (510) comprises a first end portion (511) and a second end portion (512), wherein the first end portion (511) is rotatably connected to the fixing ring (400), and the second end portion (512) is used to abut against the inner wall of the tank body (100), and the second end portion (512) is located on a side of the first end portion (511) facing away from the tank mouth (110); the second heat-conducting rod (520) is rotatably connected between the first end portion (511) and the second end portion (512).

3. A hydrogen storage tank with a replaceable heat-conducting structure according to claim 2, characterized in that: The first heat-conducting rod (510) is provided with a receiving groove (513) penetrating the second end portion (512), the opening of the receiving groove (513) faces the gas-conducting rod (300), and the second heat-conducting rod (520) is rotatably connected to the receiving groove (513), and the second heat-conducting rod (520) can be rotated relative to the first heat-conducting rod (510) until it is partially or completely received in the receiving groove (513).

4. A hydrogen storage tank with a replaceable heat-conducting structure according to claim 1, characterized in that: The connection notches (420) are all in communication with the annular slot (410), and the number of the connection notches (420) is consistent with the number of the telescopic heat-conducting frames (500).

5. A hydrogen storage tank with a replaceable heat-conducting structure according to claim 1, characterized in that: The number of the heat conducting parts (600) is N, the number of the fixing rings (400) is greater than or equal to N+1, the N heat conducting parts (600) and the N+1 fixing rings (400) are arranged at intervals along the axial direction of the gas guide rod (300), and N is a positive integer.

6. A hydrogen storage tank with a replaceable heat-conducting structure according to claim 1, characterized in that: It also comprises an extension rod (700), wherein the extension rod (700) is arranged between two adjacent fixing rings (400).

7. A hydrogen storage tank with a replaceable heat-conducting structure according to claim 1, characterized in that: The fixing ring (400) is provided with a polygonal hole (440) penetrating the axis, and the polygonal hole (440) is used for inserting a polygonal wrench to drive the fixing ring (400) to rotate around the axis.

8. The hydrogen storage tank with replaceable heat-conducting structure according to claim 1, characterized in that: The tank mouth (110), the gas guide rod (300) and the fixing ring (400) are coaxially arranged.

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