A seal for a hydrogen storage device

Abstract

The utility model relates to the technical field of sealing element, especially a sealing element for hydrogen storage equipment, comprising: a flange plate, a center through hole for hydrogen gas conveying is set up in the center of flange plate, one side of flange plate is used for fixedly connecting hydrogen storage equipment pipeline, the other side is provided with annular abutment wall, the side provided with abutment wall is used for connecting the side provided with abutment wall of the flange plate on the other hydrogen storage equipment pipeline, annular sealing groove is set up on abutment wall, two sealing grooves of two flange plates butt joint share a sealing washer, the sealing washer comprises a center metal ring and two sealing rings, two sealing rings are arranged at both ends of center metal ring respectively, and the overall width of sealing washer is greater than the depth of a sealing groove. The sealing element for hydrogen storage equipment can continuously maintain good sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and in particular to a sealing component for hydrogen storage equipment. Background Technology

[0002] Hydrogen energy is a clean and efficient energy source. Methods for storing hydrogen include gaseous hydrogen storage, liquid hydrogen storage, and solid hydrogen storage. One method, which involves storing hydrogen through underground hydrogen storage wells, offers higher safety and requires less land area.

[0003] In practical applications, hydrogen storage wells are mainly made of metal materials and are connected by multiple sections of metal pipes. Therefore, multiple joints are needed to connect the multiple pipe sections. Generally, flanges and gaskets are used for sealing to prevent leakage. However, the storage of liquid hydrogen is at a very low temperature. As the storage time increases, the low temperature continues to act on the gaskets, causing them to shrink and reducing their sealing performance, which has an adverse effect on the storage of hydrogen.

[0004] Chinese patent CN217540352U discloses a sealing structure for a high-pressure hydrogen storage tank, used for the joint between two sealing components in the tank. An O-ring and a protective gasket are disposed within a groove formed on the mating surface of one sealing component. The O-ring is positioned close to the inner side of the high-pressure hydrogen storage tank, and the protective gasket is positioned close to the outer side. The O-ring is tightly fitted to the mating surface of the other sealing component. The distance between the bottom surface of the groove and the mating surface of the other sealing component is set to be shorter closer to the outer side of the high-pressure hydrogen storage tank. However, this design still suffers from the drawback that with increasing storage time, the continuous effect of low temperature on the sealing gasket causes it to shrink, reducing its sealing performance and negatively impacting hydrogen storage. Utility Model Content

[0005] The problem this utility model aims to solve is to provide a sealing component for hydrogen storage devices that can maintain a durable sealing effect, addressing the aforementioned shortcomings. To solve the above technical problems, the technical solution proposed by this utility model is as follows:

[0006] A seal for a hydrogen storage device, comprising:

[0007] The flange has a central through hole for hydrogen transportation. One side of the flange is used to fix and connect the hydrogen storage equipment pipeline, and the other side is provided with an annular abutment wall. The side with the abutment wall is used to connect with the side of the flange with the abutment wall on another hydrogen storage equipment pipeline. The abutment wall has an annular sealing groove. The two sealing grooves of the two flanges share a sealing gasket.

[0008] The sealing gasket includes a central metal ring and two sealing rings, which are respectively located at both ends of the central metal ring. The overall width of the sealing gasket is greater than the depth of a sealing groove.

[0009] In one embodiment, the sealing ring includes a wire mesh reinforcing ring and a wear-resistant rubber layer covering both sides of the wire mesh reinforcing ring.

[0010] In one embodiment, the outer two ends of the central metal ring are provided with a plurality of protruding, evenly distributed teeth.

[0011] In one embodiment, a soft deformable ring is fixedly connected to the outer end face of each of the two sealing rings. The diameter of the soft deformable ring is the same as the diameter of the central metal ring, and the width of the soft deformable ring is greater than the width of the sealing ring.

[0012] In one embodiment, the wall thickness of the sealing gasket is equal to the width of the sealing groove.

[0013] In one embodiment, the inner wall of the sealing groove is provided with multiple slots, and the inner wall of the central metal ring is provided with multiple sliders. The sealing gasket is fixed in the sealing groove by the cooperation of the sliders and the slots, and the length of the slider is greater than the length of the slot.

[0014] In one embodiment, the length of the slider is twice the length of the slot.

[0015] In one embodiment, the outermost ring of the abutment wall is provided with an annular groove, the bottom of the annular groove near the flange is provided with a wedge-shaped groove, and the bottom of the annular groove away from the flange is a flat groove.

[0016] In one embodiment, a plurality of bolt holes are evenly distributed on the outer ring of the flange. When two flanges are joined together, the two flanges are fixedly connected by bolts passing through the bolt holes.

[0017] In one embodiment, the flange has a butt block on one side for fixing the hydrogen storage equipment pipeline, which is used for welding and fixing to the hydrogen storage equipment pipeline.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, by setting a sealing gasket with an inner lining and a central metal ring, has a more robust structure than the commonly used O-ring sealing gasket. By using the inner lining and central metal ring as the skeleton of the sealing gasket to connect the sealing ring, the overall strength of the sealing gasket is increased, which can effectively enhance the sealing gasket's resistance to pressure and shrinkage, and prevent the sealing gasket from shrinking excessively over time. Furthermore, since two flanges share a single sealing gasket, after the two flanges are locked, the sealing gasket is deformed by the pressure of the two sealing grooves, resulting in better sealing performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of a sealing element for a hydrogen storage device according to one embodiment;

[0021] Figure 2 A schematic diagram of the flange structure of a sealing element for a hydrogen storage device according to one embodiment;

[0022] Figure 3 A schematic cross-sectional view of a flange structure for a sealing element used in a hydrogen storage device according to one embodiment;

[0023] Figure 4 A sealing element for a hydrogen storage device according to one embodiment Figure 3 Enlarged view of the structure of region A in the middle;

[0024] Figure 5 A schematic diagram of the sealing gasket structure of a sealing element for a hydrogen storage device according to one embodiment;

[0025] Figure 6 A schematic cross-sectional view of a sealing gasket for a hydrogen storage device according to one embodiment;

[0026] Figure 7 This is a schematic diagram of the flange assembly of a sealing component for a hydrogen storage device according to one embodiment.

[0027] In the diagram: 1. Flange; 2. Central through hole; 3. Bolt hole; 4. Abutment wall; 5. Annular groove; 6. Wedge groove; 7. Sealing groove; 8. Slot; 9. Sealing gasket; 10. Central metal ring; 101. Tooth; 12. Sliding block; 13. Sealing ring; 14. Soft deformation ring; 15. Wear-resistant rubber layer; 16. Steel wire mesh reinforcement layer. Detailed Implementation

[0028] To facilitate understanding of this utility model, the following description will be provided in more comprehensive and detailed manner with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0029] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0030] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0031] Please see Figure 1-7 One embodiment of a sealing component for a hydrogen storage device includes a flange 1. The flange 1 has a central through hole 2 for hydrogen transport. One side of the flange 1 is used to fix a hydrogen storage device pipeline, and the other side is provided with an annular abutment wall 4. The side with the abutment wall 4 is used to connect with the side of another flange 1 on a hydrogen storage device pipeline that has an abutment wall. An annular sealing groove 7 is provided on the abutment wall 4. The two sealing grooves 7 of the two flanges 1 are connected and share a sealing gasket 9. The sealing gasket 9 includes a central metal ring 10 and two sealing rings 13. The two sealing rings 13 are respectively provided at both ends of the central metal ring 10. The overall width of the sealing gasket 9 is greater than the depth of a sealing groove 7, and the wall thickness of the sealing gasket 9 is equal to the width of the sealing groove 7.

[0032] Specifically, in one embodiment, a plurality of bolt holes 3 are evenly distributed around the outer ring of the flange 1. When two flanges 1 are joined together, the two flanges 2 are fixedly connected by bolts passing through the bolt holes 3. Preferably, in one embodiment, a mating block is provided on the side of the flange 1 used for fixing the hydrogen storage equipment pipeline, for welding and fixing to the hydrogen storage equipment pipeline.

[0033] Preferably, in one embodiment, the outermost ring of the abutment wall 4 is provided with an annular groove 5, and the bottom of the annular groove 5 is provided with a wedge-shaped groove 6 on the side close to the flange 1. The bottom of the annular groove 5 away from the flange 1 is a flat groove. Since hydrogen storage wells are generally installed underground, the underground environment is more humid than the ground. With the increase of use time and the low temperature of hydrogen, condensation water is easily generated on the surface of the flange 1. This condensation water may penetrate into the abutment wall 4 of the two flanges 1, thereby corroding the flange 1 and the sealing gasket 9. The wedge-shaped groove 6 can be used to guide the condensation water, so that the condensation water flows out of the flange 1 along the wedge-shaped groove 6, reducing the impact on the sealing gasket 9. In actual use, a water-absorbing gasket can be installed at the annular groove 5 to cooperate with the wedge-shaped groove 6 to enhance the anti-corrosion effect.

[0034] Preferably, in one embodiment, the inner wall of the sealing groove 7 is evenly provided with a plurality of slots 8, and in this embodiment, there are four slots 8. The inner wall of the central metal ring 10 is correspondingly provided with a plurality of sliders 12, which are adapted to the slots 8, and the length of the sliders 12 is greater than the length of the slots 8. More preferably, the length of the sliders 12 is twice that of the slots 8. The sliders 12 are slidably connected to the slots 8. When installing the flange 1, the central metal ring 10 is inserted into the slots 8, which facilitates positioning and prevents it from falling out.

[0035] Preferably, in one embodiment, a wire mesh reinforcing layer 16 is provided at the center of the sealing ring 13, and wear-resistant rubber layers 15 are fixedly connected to both sides of the wire mesh reinforcing layer 16. The wear-resistant rubber layer 15 improves the wear resistance and extends the service life of the sealing ring 13. The wire mesh reinforcing layer 16 serves as a liner for the wear-resistant rubber layer 15, further enhancing the sealing ring 13's compression and deformation resistance. Combined with the central metal ring 10, it has better performance in low-temperature underground environments.

[0036] Preferably, in one embodiment, a soft deformable ring 14 is fixedly connected to the outer end face of each of the two sealing rings 13. The diameter of the soft deformable ring 14 is the same as the diameter of the central metal ring 10, and the width of the soft deformable ring 14 is greater than the width of the sealing ring 13. After the two flanges 1 are locked, the soft deformable ring 14 is deformed by the pressure of the two sealing grooves 7 and eventually fills the gap between the soft deformable ring 14 and the central metal ring 10. Since the actual volume of the soft deformable ring 14 is greater than the volume of the gap between the soft deformable ring 14 and the central metal ring 10, the interference fit of the soft deformable ring 14 can offset the shrinkage caused by low temperature during use, so that the sealing gasket 9 always fills the sealing groove 7 and maintains the sealing effect.

[0037] More preferably, in one embodiment, the outer two ends of the central metal ring 10 are provided with a plurality of protruding, evenly distributed teeth 101, which protrude from the central metal ring 10. After the two flanges 1 are locked, the teeth 101 engage with the soft deformable ring 14, so that the soft deformable ring 14 fills the gaps of the teeth 101 and is limited by the teeth 101, preventing the soft deformable ring 14 from sliding or shifting.

[0038] In use, the flange 1 is welded to the hydrogen storage equipment pipeline as a whole. The slider 12 of the inner ring of the central metal ring 10 is inserted into the slot 8. At this time, the flange 1 at the end of another pipeline is aligned with the current flange 1, and the slot 8 is connected to the slider 12 to complete the connection of the two flanges 1. The two sealing grooves 7 share a sealing gasket 9. Compared with the commonly used O-ring gasket, the sealing gasket 9 has a more robust structure. The inner metal ring 10 serves as the skeleton of the sealing gasket 9, which increases the overall strength of the sealing gasket 9 and effectively enhances its resistance to pressure and shrinkage. The bolt holes 3 on the two flanges 1 are locked by bolts with relatively spaced bolts. As the bolts are locked, the soft deformation ring 14 is deformed by the pressure of the two sealing grooves 7 and eventually fills the gap between the soft deformation ring 14 and the central metal ring 10. Finally, the soft deformation ring 14 fills the gap of the teeth 101 and is limited by the teeth 101 to prevent the soft deformation ring 14 from sliding or shifting, thus completing the installation. The interference fit of the soft deformable ring 14 counteracts the shrinkage caused by low temperature, ensuring that the sealing gasket 9 always fills the sealing groove 7.

[0039] During use, as the hydrogen storage time increases, the condensate generated on the surface of flange 1 is guided out of flange 1 through wedge groove 6. In actual use, water-absorbing gaskets can be installed at annular groove 5 to cooperate with wedge groove 6 to enhance the anti-corrosion effect.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sealing element for a hydrogen storage device, characterized in that, include: The flange has a central through hole for hydrogen transportation. One side of the flange is used to fix and connect the hydrogen storage equipment pipeline, and the other side is provided with an annular abutment wall. The side with the abutment wall is used to connect with the side of the flange with the abutment wall on another hydrogen storage equipment pipeline. The abutment wall has an annular sealing groove. The two sealing grooves of the two flanges share a sealing gasket. The sealing gasket includes a central metal ring and two sealing rings, which are respectively located at both ends of the central metal ring. The overall width of the sealing gasket is greater than the depth of a sealing groove.

2. The sealing element for a hydrogen storage device according to claim 1, characterized in that, The sealing ring includes a wire mesh reinforcing ring and a wear-resistant rubber layer covering both sides of the wire mesh reinforcing ring.

3. A sealing element for a hydrogen storage device according to claim 1, characterized in that, The outer two ends of the central metal ring are provided with multiple protruding, evenly distributed teeth.

4. A sealing element for a hydrogen storage device according to claim 1, characterized in that, Both sealing rings have a soft deformable ring fixedly connected to their outer end faces. The diameter of the soft deformable ring is the same as that of the central metal ring, and the width of the soft deformable ring is greater than that of the sealing ring.

5. A sealing element for a hydrogen storage device according to any one of claims 1-4, characterized in that, The wall thickness of the sealing gasket is equal to the width of the sealing groove.

6. A sealing element for a hydrogen storage device according to claim 1, characterized in that, The inner wall of the sealing groove is provided with multiple slots, and the inner wall of the central metal ring is provided with multiple sliders. The sealing gasket is fixed in the sealing groove by the cooperation of the sliders and the slots. The length of the slider is greater than the length of the slot.

7. A sealing element for a hydrogen storage device according to claim 6, characterized in that, The length of the slider is twice the length of the slot.

8. A sealing element for a hydrogen storage device according to claim 1, characterized in that, The outermost ring of the abutment wall has an annular groove, the bottom of the annular groove near the flange has a wedge-shaped groove, and the bottom of the annular groove away from the flange has a flat groove.

9. A sealing element for a hydrogen storage device according to claim 1, characterized in that, The outer ring of the flange has multiple bolt holes evenly spaced. When two flanges are joined together, they are fixedly connected by bolts passing through the bolt holes.

10. A sealing element for a hydrogen storage device according to claim 1, characterized in that, The flange is equipped with a butt block on one side for fixing the hydrogen storage equipment pipeline, which is used for welding and fixing to the hydrogen storage equipment pipeline.

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