High-pressure gas storage tank with multiple sealing structures

Abstract

The invention relates to a high-pressure gas storage tank with multiple sealing structures. Comprising a tank body, a plurality of supporting frames fixedly arranged on the tank body, an air inlet pipe fixedly arranged on the tank body, an air outlet pipe fixedly arranged on the tank body, an air inlet sealing mechanism fixedly arranged on the air inlet pipe, an air outlet sealing mechanism fixedly arranged on the air outlet pipe and an air outlet control mechanism fixedly arranged on the air outlet pipe. The air inlet pipe is subjected to multiple sealing by arranging the first expansion sealing assembly and the first sliding sealing assembly; and the second expansion sealing assembly and the second sliding sealing assembly are arranged to conduct multiple sealing on the air outlet pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure gas storage tanks, and in particular to a high-pressure gas storage tank with a multiple sealing structure. Background Art

[0002] Gas storage tanks refer to equipment specially used to store gas, which can also stabilize the system pressure. According to the difference in the pressure that gas storage tanks can withstand, they can be divided into high-pressure gas storage tanks and normal-pressure gas storage tanks. Among them, high-pressure gas storage tanks refer to devices that use engineering gas to suppress compression and store gas in steel or alloy containers.

[0003] Existing high-pressure gas storage tanks usually use nuts to fix the sealing covers on the pipes of the air inlet pipe and the air outlet pipe, and cooperate with rubber sealing rings to fill the depressions on the metal surface to achieve a sealing effect. This sealing method is easy to install, but since the gas tank contains high-pressure gas, the long-term pressure on the sealing ring will cause the sealing ring to deform, produce gaps, and cause leakage. Therefore, a high-pressure gas storage tank with a multiple sealing structure is required to perform multiple sealings to ensure that the high-pressure gas will not leak during long-term storage. Summary of the invention

[0004] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0005] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a high-pressure gas storage tank with a multiple sealing structure, including a tank body, a plurality of support frames fixedly arranged on the tank body, an air inlet pipe fixedly arranged on the tank body, an air outlet pipe fixedly arranged on the tank body, an air inlet sealing mechanism fixedly arranged on the air inlet pipe, an air outlet sealing mechanism fixedly arranged on the air outlet pipe, and an air outlet control mechanism fixedly arranged on the air outlet pipe;

[0006] The air intake sealing mechanism comprises a first flange fixedly arranged on the air intake pipe, a plurality of first bolts penetrating the first flange, a first groove fixedly arranged on the air intake pipe, a first cover plate sleeved on the first bolt and fitted with the first groove, a plurality of first nuts rotatably arranged on the first bolt, a first expansion sealing assembly arranged on the cover plate, and a first sliding sealing assembly fixedly arranged on the air intake pipe;

[0007] The air outlet sealing mechanism includes a second flange fixed on the air outlet pipe, a plurality of second bolts penetrating the second flange, a second groove fixed on the air outlet pipe, a second cover plate sleeved on the second bolts and fitted with the second groove, a plurality of second nuts rotatably arranged on the second bolts, a second expansion sealing assembly arranged on the cover plate, and a second sliding sealing assembly fixed on the air outlet pipe.

[0008] Specifically, the first expansion sealing assembly includes a first mounting groove fixed on the air intake pipe and the first cover plate, a first clamping groove fixed on the first cover plate, a first expansion ring fixed on the first mounting groove, a third groove fixed on the first expansion ring, a plurality of second mounting grooves fixed on the first cover plate, a first support plate provided on the first cover plate, a plurality of third bolts penetrating the first support plate and provided on the second mounting groove, and a plurality of first ventilation grooves fixed on the first cover plate and the first support plate.

[0009] Specifically, the first sliding sealing assembly includes a first air guide ring fixedly arranged on the air intake pipe, a first baffle fixedly arranged on the air intake pipe, a plurality of first air guide grooves fixedly arranged on the first air guide ring, a plurality of first slide grooves fixedly arranged on the first air guide ring, a first sealing cover slidably arranged on the first slide groove, a first spring fixedly arranged at one end on the first sealing cover and at the other end on the first baffle, a first sealing ring fixedly arranged on the first air guide ring, and a first auxiliary sealing device fixedly arranged on the first support plate and the first sealing cover.

[0010] Specifically, the first auxiliary sealing device includes a first top block fixed on the first sealing cover, a first top seat fixed on the first support plate, a plurality of second slide grooves fixed on the first top seat, a first slider slidably arranged on the second slide grooves, and a second spring with one end fixed on the first slider and the other end fixed on the first top seat.

[0011] Specifically, the second expansion sealing assembly includes a third mounting groove fixed on the air outlet pipe and the second cover plate, a second clamping groove fixed on the second cover plate, a second expansion ring arranged on the third mounting groove, a fourth groove fixed on the second expansion ring, a plurality of fourth mounting grooves fixed on the second cover plate, a second support plate arranged on the second cover plate, a plurality of fourth bolts penetrating the second support plate and arranged on the fourth mounting groove, and a plurality of second ventilation grooves fixed on the second cover plate and the second support plate.

[0012] Specifically, the second sliding sealing assembly includes a second air guide ring fixedly arranged on the air inlet pipe, a second baffle plate fixedly arranged on the air outlet pipe, a plurality of second air guide grooves fixedly arranged on the second air guide ring, a plurality of third slide grooves fixedly arranged on the second air guide ring, a second sealing cover slidably arranged on the third slide groove, a third spring with one end fixedly arranged on the second sealing cover and the other end fixedly arranged on the second baffle plate, a second sealing ring fixedly arranged on the second air guide ring, and a second auxiliary sealing device fixedly arranged on the second support plate and the second sealing cover.

[0013] Specifically, the second auxiliary sealing device includes a second top block fixed on the second sealing cover, a second top seat fixed on the second support plate, a plurality of fourth slide grooves fixed on the first top seat, a second slider slidably arranged on the fourth slide groove, and a fourth spring with one end fixed on the second slider and the other end fixed on the second top seat.

[0014] Specifically, the air outlet control mechanism includes a fifth groove fixed on the second top seat, a control box fixed on the air outlet pipe, a first rotating shaft rotatably arranged on the control box, a first gear fixed on the first rotating shaft, a second gear rotatably arranged on the control box and meshing with the first gear, a third gear rotatably arranged on the control box and coaxially arranged with the second gear, a fourth gear rotatably arranged on the control box and meshing with the third gear, a control rod passing through the fourth gear, and a plurality of oil seals fixed on the control box.

[0015] The beneficial effects of the present invention are:

[0016] (1) A multiple sealing structure is provided at the air inlet pipe to prevent gas leakage. By providing a first sliding sealing component, self-sealing is achieved after high-pressure gas is filled in. By providing a first expansion sealing component and a first auxiliary sealing device, a small amount of gas is released when the first expansion sealing component is installed to push the first expansion ring to expand. The first expansion ring is tightly attached to the first installation groove to fill the gap between the first cover plate and the first flange to prevent gas leakage.

[0017] (2) A multiple sealing structure is provided at the gas outlet pipe to prevent gas leakage. By setting a second sliding sealing component, self-sealing is achieved after filling with high-pressure gas. By setting a second expansion sealing component and a second auxiliary sealing device, when the second expansion sealing component is installed, a small amount of gas is released to push the second expansion ring to expand. The second expansion ring is tightly attached to the third installation groove to fill the gap between the second cover plate and the second flange to prevent gas leakage.

[0018] (3) By setting up a gas outlet control mechanism, when the gas in the tank needs to be used, the second expansion seal assembly is first removed, and the pipeline is connected to the second flange. The connecting vehicle rotates the first shaft to drive the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the third gear to rotate, the third gear drives the fourth gear to rotate, and the fourth gear drives the control rod to move downward, and the second sealing cover is pushed to move through the fifth groove, so that the second air guide groove is opened and the gas in the tank can flow out. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0020] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0021] In the attached picture:

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 A top view of the present invention;

[0024] Figure 3 for Figure 2 Line section of AA in the middle;

[0025] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0026] Figure 5 for Figure 3 A partial enlarged view of point C in the middle;

[0027] Figure 6 for Figure 3 A partial enlarged view of point D in the middle;

[0028] Figure 7 for Figure 3 A partial enlarged view of point E in the middle;

[0029] Figure 8 for Figure 3 A partial enlarged view of point F in the middle;

[0030] Fig. 9 for Figure 3 A partial enlarged view of the G in the middle;

[0031] Fig.10 for Figure 3A partial enlarged view of the H in the middle;

[0032] Fig.11 for Figure 3 A partial enlarged view of point I in the middle;

[0033] Fig.12 for Figure 3 A partial enlarged view of the J in the middle. DETAILED DESCRIPTION

[0034] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0035] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0036] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0037] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0038] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0039] Reference Figure 1-Figure 12 As shown, a high-pressure gas storage tank with a multiple sealing structure described in the present invention comprises a tank body 1, a plurality of support frames 2 fixedly arranged on the tank body, an air inlet pipe 3 fixedly arranged on the tank body, an air outlet pipe 4 fixedly arranged on the tank body, an air inlet sealing mechanism 5 fixedly arranged on the air inlet pipe, an air outlet sealing mechanism 6 fixedly arranged on the air outlet pipe, and an air outlet control mechanism 7 fixedly arranged on the air outlet pipe; a cavity is provided inside the tank body for storing high-pressure gas, and the cavity is connected with the air inlet pipe and the air outlet pipe; the air inlet pipe is connected with the inflation device for inflation; the air inlet sealing mechanism can seal the air inlet pipe; the air outlet sealing mechanism can seal the air outlet pipe; the air outlet control mechanism can cooperate with the air outlet sealing mechanism to open the sealing mechanism when gas is needed;

[0040] The air intake sealing mechanism comprises a first flange 51 fixed on the air intake pipe, a plurality of first bolts 52 penetrating the first flange, a first groove 53 fixed on the air intake pipe, a first cover plate 54 sleeved on the first bolt and fitted with the first groove, a plurality of first nuts 55 rotatably arranged on the first bolt, a first expansion sealing component 56 arranged on the cover plate, and a first sliding sealing component 57 fixed on the air intake pipe; the first bolt and the first nut are arranged in cooperation to fix the first cover plate on the first flange, and the first cover plate is fitted with the first groove; when the air pressure inside the air intake pipe increases, the first expansion sealing component can expand to fill the gap between the first cover plate and the first flange, thereby enhancing the sealing effect; the first sliding sealing component realizes a one-way sealing effect, and can cooperate with the first cover plate at the same time, and when the first cover plate is installed, it drives the first expansion sealing component to expand, thereby realizing the function of multiple sealing;

[0041] The air outlet sealing mechanism includes a second flange 61 fixed on the air outlet pipe, a plurality of second bolts 62 penetrating the second flange, a second groove 63 fixed on the air outlet pipe, a second cover plate 64 sleeved on the second bolt and fitted with the second groove, a plurality of second nuts 65 rotatably arranged on the second bolt, a second expansion sealing assembly 66 arranged on the cover plate, and a second sliding sealing assembly 67 fixed on the air outlet pipe; when the air pressure inside the intake pipe increases, the second expansion sealing assembly can expand to fill the gap between the second cover plate and the second flange to enhance the sealing effect; the second sliding sealing assembly realizes a one-way sealing effect and can cooperate with the second cover plate at the same time. When the second cover plate is installed, it drives the second expansion sealing assembly to expand to realize the function of multiple sealing.

[0042] Specifically, the first expansion seal assembly includes a first mounting groove 561 fixedly provided on the air inlet pipe and the first cover plate, a first clamping groove 562 fixedly provided on the first cover plate, a first expansion ring 563 provided on the first mounting groove, a third groove 564 fixedly provided on the first expansion ring, a plurality of second mounting grooves 565 fixedly provided on the first cover plate, a first support plate 566 provided on the first cover plate, a plurality of third bolts 567 penetrating the first support plate and provided on the second mounting groove, and a plurality of first ventilation grooves 568 fixedly provided on the first cover plate and the first support plate; the first mounting groove is a cross-section of The trapezoidal circular groove fits with the first expansion ring; the first clamping groove limits the first expansion ring to prevent the first expansion ring from detaching from the first mounting groove; the first expansion ring fits with the first mounting groove and is made of soft rubber. A third groove is provided on the first expansion ring. When high-pressure gas enters the third groove, the pressure will push the first expansion ring to expand, so that the first expansion ring is close to the first mounting groove, filling the gap between the first cover plate and the first flange to prevent gas leakage; the first support plate is used to be fixed to the first cover plate by a third bolt to limit the first expansion ring; one end of the first ventilation groove is connected to the third groove, and the other end is connected to the air intake pipe.

[0043] Specifically, the first sliding sealing assembly includes a first air guide ring 571 fixed on the air intake pipe, a first baffle plate 572 fixed on the air intake pipe, a plurality of first air guide grooves 573 fixed on the first air guide ring, a plurality of first slide grooves 574 fixed on the first air guide ring, a first sealing cover 575 slidably arranged on the first slide groove, a first spring 576 fixed at one end on the first sealing cover and fixed at the other end on the first baffle plate, a first sealing ring 577 fixed on the first air guide ring, and a first auxiliary sealing device 578 fixed on the first support plate and the first sealing cover; inclined surfaces are provided on both sides of the first air guide ring to facilitate gas flow; the first air guide groove cooperates with the first sealing cover, and the first sealing cover can control the opening and closing of the first air guide groove; the first sealing ring is made of soft rubber, and the first sealing ring is slightly protruding in the initial state and is slightly wider When the air pressure in the tank is greater than the external air pressure, the gas in the tank and the first spring jointly push the first sealing cover to reset, and the first sealing cover will cover the first air guide groove, and at the same time, the edge of the first sealing cover squeezes the first sealing ring to prevent gas from leaking from the contact surface between the first sealing cover and the first air guide ring.

[0044] Specifically, the first auxiliary sealing device includes a first top block 5781 fixed on the first sealing cover, a first top seat 5782 fixed on the first supporting plate, a plurality of second slide grooves 5783 fixed on the first top seat, a first slider 5784 slidably arranged on the second slide groove, and a second spring 5785 with one end fixed on the first slider and the other end fixed on the first top seat; the second spring has a relatively large elastic coefficient; after the inflation is completed, the first sealing cover can achieve a preliminary seal, and the first expansion sealing assembly is installed at this time, but the first expansion sealing assembly needs to have a sealing effect only after the first sealing ring expands, so a first auxiliary sealing device needs to be provided, and when the first cover plate is installed, the first top seat contacts the first top block, and since the second spring has a relatively large elastic coefficient After the first top block contacts the first slider, the first slider will not be pushed into the second slide groove, but the first top block will be pushed, that is, the first sealing cover moves, the first spring is compressed, and after the first sealing cover moves, some gas will enter the cavity on the right side of the first air guide ring and the left side of the first top plate from the tank body, and because the elastic force continues to increase when the first spring is continuously compressed, when the elastic force reaches a certain level, the first spring will push the first sealing cover to reset, and the first slider will also be pushed into the second slide groove by the first top block. After the second spring is compressed, the gas enters the cavity on the right side of the first air guide ring and the left side of the first top plate, the air pressure in the cavity increases, which pushes the first expansion ring to expand. The first expansion ring is close to the first mounting groove, filling the gap between the first cover plate and the first flange to prevent gas leakage.

[0045] Specifically, the second expansion seal assembly includes a third mounting groove 661 fixedly arranged on the air outlet pipe and the second cover plate, a second clamping groove 662 fixedly arranged on the second cover plate, a second expansion ring 663 arranged on the third mounting groove, a fourth groove 664 fixedly arranged on the second expansion ring, a plurality of fourth mounting grooves 665 fixedly arranged on the second cover plate, a second support plate 666 arranged on the second cover plate, a plurality of fourth bolts 667 penetrating the second support plate and arranged on the fourth mounting groove, and a plurality of second ventilation grooves 668 fixedly arranged on the second cover plate and the second support plate; the third mounting groove is a cross-section of The trapezoidal circular groove fits with the second expansion ring; the second clamping groove limits the second expansion ring to prevent the second expansion ring from detaching from the third mounting groove; the second expansion ring fits with the third mounting groove and is made of soft rubber. The second expansion ring is provided with a fourth groove. When high-pressure gas enters the fourth groove, the pressure will push the second expansion ring to expand, so that the second expansion ring is close to the third mounting groove, filling the gap between the second cover plate and the second flange to prevent gas leakage; the second support plate is used to be fixed to the second cover plate by a fourth bolt to limit the second expansion ring; one end of the second ventilation groove is connected to the fourth groove, and the other end is connected to the air outlet pipe.

[0046] Specifically, the second sliding seal assembly includes a second air guide ring 671 fixedly arranged on the air inlet pipe, a second baffle plate 672 fixedly arranged on the air outlet pipe, a plurality of second air guide grooves 673 fixedly arranged on the second air guide ring, a plurality of third slide grooves 674 fixedly arranged on the second air guide ring, a second sealing cover 675 slidably arranged on the third slide groove, a third spring 676 having one end fixedly arranged on the second sealing cover and the other end fixedly arranged on the second baffle plate, a second sealing ring 677 fixedly arranged on the second air guide ring, a second auxiliary sealing cover fixedly arranged on the second support plate and the second sealing cover, and a third spring 676 having one end fixedly arranged on the second sealing cover and the other end fixedly arranged on the second baffle plate. Device 678; inclined surfaces are provided on both sides of the second air guide ring to facilitate gas flow; the second air guide groove cooperates with the second sealing cover, and the second sealing cover can control the opening and closing of the second air guide groove; the second sealing ring is made of soft rubber material, and the second sealing ring will be slightly protruding in the initial state, and slightly wider than the edge of the second sealing cover. When the second sealing cover is pushed by the air pressure to contact the second sealing ring, it can be slightly pressed into the second sealing ring to enhance the sealing effect; after the inflation is completed, the air pressure in the tank body is relatively large, and the pressure directly acts on the second sealing cover, so that the second sealing cover is close to the second sealing ring to achieve sealing.

[0047] Specifically, the second auxiliary sealing device includes a second top block 6781 fixed on the second sealing cover, a second top seat 6782 fixed on the second supporting plate, a plurality of fourth slide grooves 6783 fixed on the first top seat, a second slider 6784 slidably arranged on the fourth slide groove, and a fourth spring 6785 with one end fixed on the second slider and the other end fixed on the second top seat; after the inflation is completed, the second sealing cover can achieve preliminary sealing, and the second expansion sealing assembly is installed at this time, but the second expansion sealing assembly needs to have a sealing effect after the second sealing ring expands, so a second auxiliary sealing device needs to be provided, and when the second cover plate is installed, the second top seat contacts the second top block, and since the elastic coefficient of the fourth spring is relatively large, the second top block After contacting the second slider, the second slider will not be pushed into the fourth slide groove, but the second top block will be pushed, that is, the second sealing cover moves, and the third spring is compressed. After the second sealing cover moves, some gas will enter the cavity on the left side of the second air guide ring and the right side of the second top plate from the tank body, and because the elastic force continues to increase when the third spring is continuously compressed, when the elastic force reaches a certain level, the third spring will push the second sealing cover to reset, and the second slider will also be pushed into the fourth slide groove by the second top block. The fourth spring is compressed, and the gas enters the cavity on the left side of the second air guide ring and the right side of the second top plate, causing the air pressure in the cavity to increase, pushing the second expansion ring to expand. The second expansion ring is close to the third mounting groove, filling the gap between the second cover plate and the second flange to prevent gas leakage.

[0048] Specifically, the air outlet control mechanism includes a fifth groove 71 fixed on the second top seat, a control box 72 fixed on the air outlet pipe, a first rotating shaft 73 rotatably arranged on the control box, a first gear 74 fixed on the first rotating shaft, a second gear 75 rotatably arranged on the control box and meshing with the first gear, a third gear 76 rotatably arranged on the control box and coaxially arranged with the second gear, a fourth gear 77 rotatably arranged on the control box and meshing with the third gear, a control rod 78 penetrating the fourth gear, and a plurality of oil seals 79 fixed on the control box; the diameter of the first gear is larger than that of the second gear; the diameter of the second gear is larger than that of the third gear; the diameter of the third gear is larger than that of the fourth gear; and the control box is filled with sealing oil. ; A section of the control rod near the top is provided with a thread; the inner wall of the fourth gear is provided with a thread, which meshes with the control rod; a section of the control rod near the top is provided with a groove, and a section of the control box in contact with the groove is provided with a protrusion, and the protrusion and the groove cooperate so that the control rod can only slide in the vertical direction; when the gas in the tank needs to be used, the second expansion seal assembly is first removed, and the pipeline is connected to the second flange. The connecting vehicle drives the first gear to rotate by rotating the first shaft, and the first gear drives the second gear to rotate, the second gear drives the third gear to rotate, and the third gear drives the fourth gear to rotate. The rotation of the fourth gear drives the control rod to move downward, and the second sealing cover is pushed to move through the fifth groove, so that the second air guide groove is opened and the gas in the tank can flow out.

[0049] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A high-pressure gas storage tank with a multiple sealing structure, characterized in that: It comprises a tank body (1), a plurality of support frames (2) fixedly mounted on the tank body, an air inlet pipe (3) fixedly mounted on the tank body, an air outlet pipe (4) fixedly mounted on the tank body, an air inlet sealing mechanism (5) fixedly mounted on the air inlet pipe, an air outlet sealing mechanism (6) fixedly mounted on the air outlet pipe, and an air outlet control mechanism (7) fixedly mounted on the air outlet pipe; The air intake sealing mechanism comprises a first flange (51) fixedly arranged on the air intake pipe, a plurality of first bolts (52) penetrating the first flange, a first groove (53) fixedly arranged on the air intake pipe, a first cover plate (54) sleeved on the first bolt and in contact with the first groove, a plurality of first nuts (55) rotatably arranged on the first bolt, a first expansion sealing assembly (56) arranged on the cover plate, and a first sliding sealing assembly (57) fixedly arranged on the air intake pipe; The air outlet sealing mechanism comprises a second flange (61) fixedly arranged on the air outlet pipe, a plurality of second bolts (62) penetrating the second flange, a second groove (63) fixedly arranged on the air outlet pipe, a second cover plate (64) sleeved on the second bolt and fitted with the second groove, a plurality of second nuts (65) rotatably arranged on the second bolt, a second expansion sealing component (66) arranged on the cover plate, and a second sliding sealing component (67) fixedly arranged on the air outlet pipe.

2. The high-pressure gas storage tank with a multiple sealing structure according to claim 1, characterized in that: The first expansion sealing assembly includes a first mounting groove (561) fixedly provided on the air inlet pipe and the first cover plate, a first clamping groove (562) fixedly provided on the first cover plate, a first expansion ring (563) provided on the first mounting groove, a third groove (564) fixedly provided on the first expansion ring, a plurality of second mounting grooves (565) fixedly provided on the first cover plate, a first support plate (566) provided on the first cover plate, a plurality of third bolts (567) penetrating the first support plate and provided on the second mounting groove, and a plurality of first ventilation grooves (568) fixedly provided on the first cover plate and the first support plate.

3. The high-pressure gas storage tank with a multiple sealing structure according to claim 2, characterized in that: The first sliding sealing assembly comprises a first air guide ring (571) fixedly arranged on the air intake pipe, a first baffle plate (572) fixedly arranged on the air intake pipe, a plurality of first air guide grooves (573) fixedly arranged on the first air guide ring, a plurality of first slide grooves (574) fixedly arranged on the first air guide ring, a first sealing cover (575) slidingly arranged on the first slide groove, a first spring (576) with one end fixedly arranged on the first sealing cover and the other end fixedly arranged on the first baffle plate, a first sealing ring (577) fixedly arranged on the first air guide ring, and a first auxiliary sealing device (578) fixedly arranged on the first support plate and the first sealing cover.

4. The high-pressure gas storage tank with a multiple sealing structure according to claim 3, characterized in that: The first auxiliary sealing device includes a first top block (5781) fixed on the first sealing cover, a first top seat (5782) fixed on the first support plate, a plurality of second slide grooves (5783) fixed on the first top seat, a first slider (5784) slidably arranged on the second slide grooves, and a second spring (5785) with one end fixed on the first slider and the other end fixed on the first top seat.

5. The high-pressure gas storage tank with a multiple sealing structure according to claim 1, characterized in that: The second expansion sealing assembly includes a third mounting groove (661) fixedly arranged on the air outlet pipe and the second cover plate, a second clamping groove (662) fixedly arranged on the second cover plate, a second expansion ring (663) arranged on the third mounting groove, a fourth groove (664) fixedly arranged on the second expansion ring, a plurality of fourth mounting grooves (665) fixedly arranged on the second cover plate, a second support plate (666) arranged on the second cover plate, a plurality of third bolts (667) penetrating the second support plate and arranged on the fourth mounting groove, and a plurality of second ventilation grooves (668) fixedly arranged on the second cover plate and the second support plate.

6. The high-pressure gas storage tank with a multiple sealing structure according to claim 5, characterized in that: The second sliding sealing assembly includes a second air guide ring (671) fixedly arranged on the air inlet pipe, a second baffle plate (672) fixedly arranged on the air outlet pipe, a plurality of second air guide grooves (673) fixedly arranged on the second air guide ring, a plurality of third slide grooves (674) fixedly arranged on the second air guide ring, a second sealing cover (675) slidingly arranged on the third slide groove, a third spring (676) with one end fixedly arranged on the second sealing cover and the other end fixedly arranged on the second baffle plate, a second sealing ring (677) fixedly arranged on the second air guide ring, and a second auxiliary sealing device (678) fixedly arranged on the second support plate and the second sealing cover.

7. The high-pressure gas storage tank with a multiple sealing structure according to claim 6, characterized in that: The second auxiliary sealing device includes a second top block (6781) fixed on the second sealing cover, a second top seat (6782) fixed on the second support plate, a plurality of fourth slide grooves (6783) fixed on the first top seat, a second slider (6784) slidably arranged on the fourth slide grooves, and a fourth spring (6785) with one end fixed on the second slider and the other end fixed on the second top seat.

8. The high-pressure gas storage tank with a multiple sealing structure according to claim 7, characterized in that: The air outlet control mechanism comprises a fifth groove (71) fixedly arranged on the second top seat, a control box (72) fixedly arranged on the air outlet pipe, a first rotating shaft (73) rotatably arranged on the control box, a first gear (74) fixedly arranged on the first rotating shaft, a second gear (75) rotatably arranged on the control box and meshing with the first gear, a third gear (76) rotatably arranged on the control box and coaxially arranged with the second gear, a fourth gear (77) rotatably arranged on the control box and meshing with the third gear, a control rod (78) penetrating the fourth gear, and a plurality of oil seals (79) fixedly arranged on the control box.

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