A hydrogen storage well mechanism

Abstract

The utility model discloses a kind of hydrogen storage well mechanisms, including hydrogen storage cylinder and multiple centering mechanisms, multiple centering mechanisms are installed on hydrogen storage cylinder, centering mechanism includes mounting and multiple support, mounting is fixed on hydrogen storage cylinder, multiple support is spaced apart on mounting along the circumference of hydrogen storage cylinder, support has first support part and second support part, the connecting line of the support point of the first support part of multiple support is enclosed to form first support circle, the connecting line of the support point of the second support part of multiple support is enclosed to form second support circle, and the center of first support circle and second support circle is same, the support point of multiple first support part is not under the action of external force, the diameter of first support circle is greater than the diameter of second support circle, when the support point of multiple first support part is under the action of external force, the diameter of first support circle can be driven to reduce to less than the diameter of second support circle. The problem that hydrogen storage cylinder is prone to eccentric or inclined to cause sealing failure is solved.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen storage well technology, and specifically to a hydrogen storage well mechanism. Background Technology

[0002] With the booming development of the hydrogen energy industry, hydrogen storage technology, as a key link in hydrogen storage and transportation, has received unprecedented attention for its safety and economic efficiency. Underground hydrogen storage wells, as an efficient and safe method of hydrogen storage, have their wellbore inner wall material selection and structural design having a decisive impact on their hydrogen storage performance.

[0003] Currently, nickel plating is commonly used on the inner wall of hydrogen storage wells to prevent hydrogen permeation and hydrogen embrittlement, ensuring the safety and reliability of hydrogen storage. However, this nickel plating technology relies on high-purity nickel materials and complex electroplating processes, resulting in high construction costs. Furthermore, the processing of nickel plating requires specialized equipment and processes, further increasing production and time costs, becoming one of the main bottlenecks restricting the large-scale commercial application of hydrogen storage wells. Simultaneously, precise centering of the hydrogen storage well casing is a crucial prerequisite for achieving multi-stage sealing efficiency. While traditional metal centralizers can provide initial centering, during the well casing lowering process, the combined effects of well wall friction, formation deformation, and other factors can easily lead to structural deformation or wear failure, resulting in well casing tilting, uneven sealing ring gaps, and other problems. This can induce localized stress concentration and hydrogen leakage channels, ultimately affecting hydrogen storage efficiency and creating safety hazards. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a hydrogen storage well mechanism that solves the problem that the hydrogen storage cylinder is prone to eccentricity or tilting, leading to sealing failure in the prior art.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a hydrogen storage well mechanism, including: Hydrogen storage cylinder; Multiple centering mechanisms are installed on the hydrogen storage cylinder. Each centering mechanism includes a mounting component and multiple supporting components. The mounting component is fixed on the hydrogen storage cylinder, and the multiple supporting components are spaced apart on the mounting component along the circumference of the hydrogen storage cylinder. Each supporting component has a first supporting part and a second supporting part. The lines connecting the support points of the first supporting parts of the multiple supporting components form a first supporting circle, and the lines connecting the support points of the second supporting parts of the multiple supporting components form a second supporting circle. The centers of the first supporting circle and the second supporting circle are the same. When the support points of the multiple first supporting parts are not subjected to external force, the diameter of the first supporting circle is larger than the diameter of the second supporting circle. When the support points of the multiple first supporting parts are subjected to external force, they can drive the diameter of the first supporting circle to shrink to a size smaller than the diameter of the second supporting circle.

[0006] In some embodiments, the mounting component includes two limiting portions and a fixing plate, the two limiting portions being installed at a distance from each other on the hydrogen storage cylinder, and the fixing plate being installed on the hydrogen storage cylinder and located between the two limiting portions; The first support part is slidably connected to the two limiting parts and the fixed plate, the second support part is rotatably connected to the fixed plate, and the second support part is connected to the first support part via a return spring.

[0007] In some embodiments, the limiting part includes a limiting ring block and a plurality of compression springs. The limiting ring block is mounted on the hydrogen storage cylinder, and a plurality of channels are opened on the limiting ring block. Each compression spring is respectively disposed in each channel. The first support part includes an arc-shaped support rod and a transmission rod. The arc-shaped support rod has extension rods at its opposite ends. The two extension rods are respectively inserted into the two channels and abut against the compression spring. One end of the transmission rod is slidably connected to the fixed disk along the radial direction of the hydrogen storage cylinder, and the other end is hinged to the middle of the arc-shaped support rod.

[0008] In some embodiments, the second support includes two adjusting rods, one end of each adjusting rod is rotatably connected to the fixed disk, and the two adjusting rods are respectively located on opposite sides of the transmission rod. At least one return spring is connected between each adjusting rod and the transmission rod, wherein the other end of each adjusting rod is rotatably provided with a rolling wheel.

[0009] In some embodiments, the fixed disk is provided with an arc-shaped groove along the circumferential direction of the hydrogen storage cylinder, and the adjusting rod is provided with a sliding guide rod that cooperates with the arc-shaped groove.

[0010] In some embodiments, the hydrogen storage cylinder includes a bottom cylinder, a plurality of rings, and a plurality of connectors. The bottom cylinder is connected to the rings via the connectors, and adjacent rings are connected via the connectors.

[0011] In some embodiments, the inner wall of the hydrogen storage cylinder is provided with a polymer hydrogen barrier layer.

[0012] In some embodiments, a sealing unit is further included, the sealing unit including a locking member and an air inlet / outlet member, the air inlet / outlet member being connected to the hydrogen storage cylinder via the locking member.

[0013] In some embodiments, the locking element includes a first flange, a second flange, and locking bolts. The first flange is fixedly connected to the top of the hydrogen storage cylinder, and the first flange and the second flange are fixedly connected by a plurality of locking bolts. A first sealing ring is provided between the first flange and the second flange. The intake and exhaust components include an air guide pipe and an annular block. The annular block is located at one end of the air guide pipe, which is sleeved with a second flange. Law The flange presses the ring block tightly against the top of the hydrogen storage cylinder, the gas guide pipe is connected to the hydrogen storage cylinder, and a second sealing ring is provided between the ring block and the first flange.

[0014] In some embodiments, both the first sealing ring and the second sealing ring are elastic rubber sealing rings.

[0015] Compared with the prior art, the present invention provides a hydrogen storage well mechanism, which is installed on a hydrogen storage cylinder by multiple centralizing mechanisms. Each centralizing mechanism includes a mounting component and multiple supporting components. The mounting component is fixed to the hydrogen storage cylinder, and the multiple supporting components are spaced apart on the mounting component along the circumference of the hydrogen storage cylinder. Each supporting component has a first supporting part and a second supporting part. The lines connecting the support points of the first supporting parts of the multiple supporting components form a first supporting circle, and the lines connecting the support points of the second supporting parts of the multiple supporting components form a second supporting circle. The centers of the first supporting circle and the second supporting circle are the same. Under no external force, the diameter of the first supporting circle is larger than the diameter of the second supporting circle. When the support points of the first support are subjected to external force, the diameter of the first support circle can be reduced to be smaller than the diameter of the second support circle. When the hydrogen storage cylinder is installed in the well hole of the hydrogen storage well, the support points of multiple second supports are in contact with the inner wall of the well hole. At this time, the diameter of the second support circle is larger than the diameter of the first support circle. When the centering mechanism corresponds to the enlarged hole on the well hole of the hydrogen storage well, the abutment force of the well wall of the hydrogen storage well against the support points of multiple second supports disappears. At this time, multiple first supports can be locked in the enlarged hole, and the diameter of the first support circle is larger than the diameter of the second support circle. This can effectively improve the installation stability of the hydrogen storage well and ensure that the hydrogen storage well can be used safely for a long time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a hydrogen storage well mechanism provided by this utility model; Figure 2 This is a schematic diagram of the centering mechanism provided by this utility model; Figure 3 This is a top view of the centering mechanism provided by this utility model; Figure 4 This is a partial structural schematic diagram of the centering mechanism provided by this utility model; Figure 5 This utility model provides an installation diagram of the centering mechanism; Figure 6 This is a structural schematic diagram of the sealing unit provided by this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0018] To address the technical problem of hydrogen storage cylinders easily becoming eccentric or tilted, leading to sealing failure in existing technologies, this utility model provides a hydrogen storage well mechanism that avoids collision between the hydrogen storage cylinder and the inner wall of the hydrogen storage well borehole during installation, thus ensuring the stability of the hydrogen storage cylinder installation.

[0019] Please see Figures 1-6 , Figures 1-6 According to one embodiment of the present invention, a hydrogen storage well mechanism includes a hydrogen storage cylinder 1 and multiple centering mechanisms 2. The multiple centering mechanisms 2 are installed on the hydrogen storage cylinder 1. Each centering mechanism 2 includes a mounting member 21 and multiple supporting members 22. The mounting member 21 is fixed on the hydrogen storage cylinder 1, and the multiple supporting members 22 are spaced apart on the mounting member 21 along the circumference of the hydrogen storage cylinder 1. Each supporting member 22 has a first supporting part 221 and a second supporting part 222. The lines connecting the support points of the first supporting parts 221 of the multiple supporting members 22 form a first supporting circle, and the lines connecting the support points of the second supporting parts 222 of the multiple supporting members 22 form a second supporting circle. The centers of the first supporting circle and the second supporting circle are the same. When the support points of the multiple first supporting parts 221 are not subjected to external force, the diameter of the first supporting circle is larger than the diameter of the second supporting circle. When the support points of the multiple first supporting parts 221 are subjected to external force, the diameter of the first supporting circle can be reduced to be smaller than the diameter of the second supporting circle.

[0020] In actual use, the hydrogen storage cylinder 1 is hoisted into the hydrogen storage well bore using hoisting equipment. During the process of the hydrogen storage cylinder 1 sinking into the hydrogen storage well bore, the support points of the second support parts 222 of the multiple support members 22 slide in contact with the inner wall of the hydrogen storage well bore. When the second support parts 222 of the multiple support members 22 move to correspond to the enlarged hole, the abutment force of the well wall of the hydrogen storage well bore on the support points of the multiple second support parts disappears. At this time, the multiple first support parts can be stuck in the enlarged hole. During the continued descent of the hydrogen storage cylinder 1, the hydrogen storage well bore can apply a squeezing force to the multiple first support parts, so that the diameter of the first support circle is reduced to be smaller than the diameter of the second support circle. The multiple first support parts can then fall off the enlarged hole until the hydrogen storage cylinder 1 is installed in place, and each centering mechanism 2 is stuck in its respective enlarged hole.

[0021] It should be noted that the hydrogen storage well mechanism needs to be installed inside the hydrogen storage well borehole. The hydrogen storage cylinder 1 includes a bottom cylinder, multiple cylinder rings, and multiple connecting parts. The bottom cylinder 11 is connected to the cylinder rings 12 via the connecting parts 13, and adjacent cylinder rings 12 are connected via the connecting parts 13.

[0022] Based on the above scheme, epoxy resin adhesive is used to attach the polymer hydrogen barrier layer 3 to the inner wall of the hydrogen storage cylinder, and the connection between the upper and lower sections of the polymer hydrogen barrier layer inside the hydrogen storage cylinder is fixed by heat fusion.

[0023] Specifically, the connector is an annular collar, and an annular boss is provided in the middle of the inner wall of the annular collar. The top of the bottom cylinder extends into the annular collar and abuts against the annular boss. The lower end of the cylinder ring is inserted into the annular collar and abuts against the annular boss, thereby completing the splicing of the hydrogen storage cylinder 1.

[0024] It should be noted that a centering mechanism is provided on the hydrogen storage cylinder 1 every 3-5 cylinder sections. The wellbore of the hydrogen storage well is provided with various enlarged holes along the depth direction, which can correspond to each of the centering mechanisms, and each centering mechanism can be respectively locked in each enlarged hole.

[0025] In one embodiment, the mounting component 21 includes two limiting parts 211 and a fixing plate 212. The two limiting parts 211 are installed on the hydrogen storage cylinder 1 at intervals, and the fixing plate 212 is installed on the hydrogen storage cylinder 1 and located between the two limiting parts 211. The first support part 221 is slidably connected to the two limiting parts 211 and the fixing plate 212, and the second support part 222 is rotatably connected to the fixing plate 212. The second support part 222 is connected to the first support part 221 via a return spring 213.

[0026] Specifically, the limiting part 211 includes a limiting ring block 2111 and a plurality of compression springs 2112. The limiting ring block 2111 is installed on the hydrogen storage cylinder 1. The limiting ring block 2111 has a plurality of channels, and each compression spring 2112 is respectively disposed in each channel. The first support part 221 includes an arc-shaped support rod 2211 and a transmission rod 2212. The arc-shaped support rod 2211 has extension rods at its opposite ends. The two extension rods are respectively inserted into the two channels and abut against the compression springs 2112. One end of the transmission rod 2212 is slidably connected to the fixed disk 212 along the radial direction of the hydrogen storage cylinder 1, and the other end is hinged to the middle of the arc-shaped support rod 2211.

[0027] Understandably, the arc-shaped support rod 2211 is made of highly elastic steel plate. When the arc-shaped support rod 2211 is squeezed by the inner wall of the hydrogen storage well borehole, the arc-shaped support rod 2211 can produce elastic deformation, and the two extension rods can slide away along the axial direction of the hydrogen storage cylinder. The two extension rods can squeeze the compression spring 2112 respectively. When the squeezing force on the arc-shaped support rod 2211 disappears, under the action of the rebound force of the two compression springs 2112, the two extension rods can be pushed to slide and move closer along the axial direction of the hydrogen storage cylinder, so that the arc-shaped support rod 2211 is reset.

[0028] It should be noted that, in one embodiment, the arc-shaped support rod 2211 is formed by two arc-shaped rods hinged together, and the two arc-shaped rods are hinged to the other end of the transmission rod 2212. When the inner wall of the hydrogen storage well hole presses against the hinged position of the two arc-shaped rods, the transmission rod 2212 can be driven to slide relative to the fixed disk 212, which can separate the arc-shaped support rod 2211 from the inner wall of the hydrogen storage well hole.

[0029] It should be noted that, in one embodiment, the second support 222 includes two adjusting rods 2221, one end of each adjusting rod 2221 is rotatably connected to the fixed disk 212, and the two adjusting rods 2221 are respectively located on opposite sides of the transmission rod 2212. At least one return spring 213 is connected between each adjusting rod 2221 and the transmission rod 2212, and the other end of each adjusting rod 2221 is rotatably provided with a rolling wheel 2213.

[0030] Specifically, the fixed disk 212 is provided with an arc-shaped groove 212a along the circumferential direction of the hydrogen storage cylinder 1, and the adjusting rod 2221 is provided with a sliding guide rod that cooperates with the arc-shaped groove 212a.

[0031] Understandably, when the arc-shaped support rod 2211 is compressed by an external force, the transmission rod 2212 slides along the radial direction of the hydrogen storage cylinder 1 and approaches the hydrogen storage cylinder 1. At this time, under the action of the return spring 213, it can drive the two adjusting rods 2221 to rotate, so that the rolling wheels 2213 at the ends of the two adjusting rods 2221 contact the inner wall of the hydrogen storage well hole. When the external force on the ends of the two adjusting rods 2221 disappears, under the action of the return spring 213, the two adjusting rods 2221 can rotate to reset. At the same time, the transmission rod 2212 slides along the radial direction of the hydrogen storage cylinder 1 and moves away from the hydrogen storage cylinder 1, so that the arc-shaped support rod 2211 moves toward the inner wall of the hydrogen storage well hole.

[0032] Based on the above scheme, a sealing unit 4 is also included. The sealing unit 4 includes a locking member 41 and an air inlet / outlet member 42. The air inlet / outlet member 42 is connected to the hydrogen storage cylinder 1 via the locking member 41.

[0033] Specifically, the locking component 41 includes a first flange 411, a second flange 412, and locking bolts 413. The first flange 411 is fixedly connected to the top of the hydrogen storage cylinder 1. The first flange 411 and the second flange 412 are fixedly connected by multiple locking bolts 413, and a first sealing ring 414 is provided between the first flange 411 and the second flange 412. The inlet and outlet component 42 includes a gas guide pipe 421 and a connecting block 422. The connecting block 422 is located at one end of the gas guide pipe 421. The gas guide pipe 421 is sleeved with the second flange 412. The second flange 412 presses the connecting block 422 against the top of the hydrogen storage cylinder 1. The gas guide pipe 421 is connected to the hydrogen storage cylinder 1, and a second sealing ring 423 is provided between the connecting block 422 and the first flange 411.

[0034] In this specific embodiment, both the first sealing ring and the second sealing ring are elastic rubber sealing rings. This technical solution also provides a method for installing a hydrogen storage well mechanism, the specific steps of which are as follows: S1: Determine the location of the hydrogen storage well according to the design drawings, and use measuring instruments to accurately measure and locate it to ensure the accuracy of the well location; S2: Use drill bits suitable for geological conditions for drilling operations, select drilling parameters reasonably according to the strata conditions, strictly control the verticality and depth of the borehole, enlarge the hole at the designated location according to the design requirements, remove drill cuttings in a timely manner, keep the hole clean, and after the drilling is completed, conduct hole acceptance to check whether the hole diameter, hole depth and verticality meet the design requirements. S3: Multiple centering mechanisms are installed at intervals on the hydrogen storage cylinder; S4: Use a crane to lower the hydrogen storage cylinder into the hydrogen storage well hole in sections, centering them. During the lowering process, keep it stable and avoid collision with the inner wall of the well hole to ensure the integrity of the hydrogen storage cylinder. Make sure that each centering mechanism corresponds to each expansion hole in the hydrogen storage well hole. Use epoxy resin to stick the polymer hydrogen barrier layer to the inner wall of the hydrogen storage cylinder, and use heat fusion to fix the connection between the upper and lower sections of the hydrogen storage cylinder with the polymer hydrogen barrier layer. S5: Using the external tube positive circulation cementing technology, a cementing strip is sent to the bottom of the well along the annular space between the wellbore and the well wall of the hydrogen storage well. Then, cement mortar is sent to the bottom of the well along the cementing strip. The cementing strip is lifted while being poured until the cement mortar fills the entire annular space, forming a cementing ring. S6: Install a sealing unit on the top of the hydrogen storage cylinder; S7: After construction is completed, a comprehensive inspection and debugging of the hydrogen storage well mechanism will be carried out, including water pressure test and air tightness test. Check whether there is any leakage or abnormal deformation in the connection parts of the hydrogen storage well mechanism and the hydrogen storage cylinder.

[0035] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A hydrogen storage well mechanism, characterized by, include: Hydrogen storage cylinder; Multiple centering mechanisms are installed on the hydrogen storage cylinder. Each centering mechanism includes a mounting component and multiple supporting components. The mounting component is fixed on the hydrogen storage cylinder, and the multiple supporting components are spaced apart on the mounting component along the circumference of the hydrogen storage cylinder. Each supporting component has a first supporting part and a second supporting part. The lines connecting the support points of the first supporting parts of the multiple supporting components form a first supporting circle, and the lines connecting the support points of the second supporting parts of the multiple supporting components form a second supporting circle. The centers of the first supporting circle and the second supporting circle are the same. When the support points of the multiple first supporting parts are not subjected to external force, the diameter of the first supporting circle is larger than the diameter of the second supporting circle. When the support points of the multiple first supporting parts are subjected to external force, they can drive the diameter of the first supporting circle to shrink to a size smaller than the diameter of the second supporting circle.

2. The hydrogen storage well mechanism of claim 1, wherein, The mounting component includes two limiting parts and a fixing plate. The two limiting parts are installed on the hydrogen storage cylinder at a distance, and the fixing plate is installed on the hydrogen storage cylinder and located between the two limiting parts. The first support part is slidably connected to the two limiting parts and the fixed plate, the second support part is rotatably connected to the fixed plate, and the second support part is connected to the first support part via a return spring.

3. The hydrogen storage well mechanism of claim 2, wherein, The limiting part includes a limiting ring block and multiple compression springs. The limiting ring block is installed on the hydrogen storage cylinder. Multiple channels are opened on the limiting ring block, and each compression spring is respectively disposed in each channel. The first support part includes an arc-shaped support rod and a transmission rod. The arc-shaped support rod has extension rods at its opposite ends. The two extension rods are respectively inserted into the two channels and abut against the compression spring. One end of the transmission rod is slidably connected to the fixed disk along the radial direction of the hydrogen storage cylinder, and the other end is hinged to the middle of the arc-shaped support rod.

4. The hydrogen storage well mechanism of claim 3, wherein, The second support includes two adjusting rods, one end of each adjusting rod is rotatably connected to the fixed disk, and the two adjusting rods are respectively located on opposite sides of the transmission rod. At least one return spring is connected between each adjusting rod and the transmission rod, and the other end of each adjusting rod is rotatably provided with a rolling wheel.

5. The hydrogen storage well mechanism of claim 4, wherein, The fixed plate is provided with an arc-shaped groove along the circumferential direction of the hydrogen storage cylinder, and the adjusting rod is provided with a sliding guide rod that cooperates with the arc-shaped groove.

6. The hydrogen storage well mechanism according to claim 1, characterized in that, The hydrogen storage cylinder includes a bottom cylinder, multiple cylinder rings, and multiple connectors. The bottom cylinder is connected to the cylinder rings via the connectors, and adjacent cylinder rings are connected via the connectors.

7. The hydrogen storage well mechanism according to claim 6, characterized in that, The inner wall of the hydrogen storage cylinder is provided with a polymer hydrogen barrier layer.

8. The hydrogen storage well mechanism according to claim 1, characterized in that, It also includes a sealing unit, which includes a locking element and an air inlet / outlet element, the air inlet / outlet element being connected to the hydrogen storage cylinder via the locking element.

9. The hydrogen storage well mechanism according to claim 8, characterized in that, The locking component includes a first flange, a second flange, and locking bolts. The first flange is fixedly connected to the top of the hydrogen storage cylinder. The first flange and the second flange are fixedly connected by multiple locking bolts, and a first sealing ring is provided between the first flange and the second flange. The inlet and outlet components include a gas guide pipe and a ring block. The ring block is located at one end of the gas guide pipe. The gas guide pipe is sleeved with a second flange. The second flange presses the ring block tightly against the top of the hydrogen storage cylinder. The gas guide pipe is connected to the hydrogen storage cylinder, and a second sealing ring is provided between the ring block and the first flange.

10. The hydrogen storage well mechanism according to claim 9, characterized in that, Both the first and second sealing rings are elastic rubber sealing rings.

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