Deep underground hydrogen storage facility structure and construction method therefor

Abstract

A deep underground hydrogen storage facility structure and a construction method therefor. The deep underground hydrogen storage facility structure comprises a concrete lining layer (1), a hydrogen barrier layer (2), a connecting framework (3), and a plurality of support arms (4); the concrete lining layer (1) is provided with an accommodating cavity (1a); the hydrogen barrier layer (2) is attached to the inner wall of the accommodating cavity (1a); the connecting framework (3) is provided in the concrete lining layer (1) and is arranged around the periphery of the accommodating cavity (1a); the plurality of support arms (4) are arranged at intervals on the peripheral side of the accommodating cavity (1a); each support arm (4) is provided with a connection end (41) and a rock-soil end (42), and is provided with a pouring flow channel communicated with the connection end (41) and the rock-soil end (42); the connection end (41) is located in the concrete lining layer (1) and is connected to the connection framework (3); the rock-soil end (42) is located outside the concrete lining layer; and each pouring flow channel is provided with a grout inlet located at the connection end, and is provided with grout injection ports (4a) located at the rock-soil end. In the present solution, grouting reinforcement can be performed on rock-soil layers around rock-soil ends by means of pouring ports of pouring flow channels of the deep underground hydrogen storage facility structure, so that the deep underground hydrogen storage facility structure and the surrounding rock-soil layers are cooperatively stressed, thereby greatly improving the safety performance of the deep underground hydrogen storage facility structure.

Description

A deep-ground hydrogen storage structure and its construction method Technical Field

[0001] This invention relates to, specifically to, a deep-earth hydrogen storage structure. Background Technology

[0002] With the continuous advancement of underground space development and utilization technologies, deep underground hydrogen storage is considered the most feasible development direction among large-scale hydrogen storage technologies. Compared with other storage methods, deep underground hydrogen storage has advantages such as "large reserves, low cost, high safety, and good sealing".

[0003] For example, patent CN219754598U discloses a hydrogen storage structure in an abandoned mine, which places the hydrogen storage in the mine and can take advantage of the relatively stable environmental factors such as temperature and humidity in the mine to achieve safe storage. At the same time, the surrounding rock and soil can provide natural protection and improve the safety of the hydrogen storage structure.

[0004] However, in the construction of the initial support layer in this patent, the initial support layer template is erected, drainage structures are arranged at designated locations and geotextiles are used for isolation and filtration, and finally concrete is poured and cured. The initial support layer does not cooperate with the inner wall of the mine, and the safety performance of the hydrogen storage structure needs to be improved. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a deep-ground hydrogen storage structure to solve the technical problem that the initial support layer of the hydrogen storage structure and the inner wall of the mine tunnel do not cooperate in bearing the force, and the safety performance of the hydrogen storage structure needs to be improved.

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

[0007] In a first aspect, the present invention provides a deep-earth hydrogen storage reservoir structure, comprising:

[0008] The concrete lining layer has a cavity;

[0009] A hydrogen barrier layer is attached to the inner wall of the cavity;

[0010] A connecting frame is disposed within the concrete lining layer and surrounds the periphery of the cavity; and

[0011] Multiple support arms are spaced apart around the periphery of the cavity. Each support arm has a connecting end and a soil / rock end, and is provided with a pouring channel connecting the connecting end and the soil / rock end. The connecting end is located in the concrete lining layer and is connected to the connecting frame. The soil / rock end is located outside the concrete lining layer. The pouring channel has a grout inlet located at the connecting end and a grout injection port located at the soil / rock end.

[0012] In some embodiments, the support arm includes a hollow anchor rod and an anchor rod pad, the connecting end and the soil end are formed at both ends of the hollow anchor rod, and the hollow channel of the hollow anchor rod constitutes the pouring channel;

[0013] The connecting end extends through the connecting frame to the side near the cavity, and the anchor plate is located on the side of the connecting frame near the cavity, connecting the connecting end and the connecting frame.

[0014] In some embodiments, a plurality of grouting ports are provided, and the plurality of grouting ports are spaced apart along the circumferential and / or extending direction of the support arm.

[0015] In some embodiments, the deep-ground hydrogen storage structure further includes a steel liner surrounding the periphery of the cavity and located between the concrete lining layer and the hydrogen barrier layer.

[0016] In some embodiments, the hydrogen barrier layer includes multiple sets of hydrogen barrier arc plates, which are arranged sequentially along the axial direction of the cavity. Each set of hydrogen barrier arc plates has multiple hydrogen barrier arc plates, and the multiple hydrogen barrier arc plates in the same set are arranged sequentially along the circumferential direction of the cavity.

[0017] In some embodiments, each of the hydrogen-blocking arc-shaped plates is provided with a tenon and a mortise at both ends of the cavity in the circumferential direction, and the tenon can be inserted into the adjacent mortise in the same group.

[0018] In some embodiments, each of the hydrogen-blocking arc plates has two welding ends at both ends in the circumferential direction of the cavity. The welding ends are inclined from the side away from the cavity to the side close to the cavity along the direction close to the other welding end to form a welding side.

[0019] In some embodiments, two adjacent welding sides in the same group form a weld when spliced, and the angle of the weld is α, which satisfies 45°≤α≤60°.

[0020] In some embodiments, the connecting frame is a steel cage disposed within the concrete lining layer; and / or,

[0021] The cavity is cylindrical.

[0022] Furthermore, the present invention also provides a construction method for a deep-ground hydrogen storage structure, used for any of the deep-ground hydrogen storage structures described above, wherein the construction method for the deep-ground hydrogen storage structure includes the following steps:

[0023] Excavate the earthwork required for the cavity according to the drawings, and install multiple support arms in a circular array around the cavity as the axis. Then, tie and install the connecting frame according to the design requirements, and connect the connecting end to the connecting frame. Then, inject concrete grout into the pouring channel through the grout inlet, so that the concrete grout is injected into the surrounding soil layer through the grouting port.

[0024] According to the design requirements, an annular support is set on the inner side of the cavity, and the annular support is used as an inner template for concrete pouring to form the concrete lining layer.

[0025] After the concrete lining layer is formed, the annular support is removed, the inner wall of the cavity is ground and cleaned, and then the hydrogen barrier layer is glued to the inner wall of the cavity.

[0026] Compared with existing technologies, the deep-ground hydrogen storage structure provided by this invention extends the connecting end of the support arm into the concrete lining layer, and a connecting frame is set in the concrete lining layer. The connecting end of the support arm is fixedly connected to the connecting frame to ensure the connection strength of the support arm and the strength of the concrete lining layer. At the same time, the soil end of the support arm is inserted into the soil layer, and a pouring channel is set in the support arm. Grouting can be performed on the soil layer around the soil end through the pouring port of the pouring channel, so that the deep-ground hydrogen storage structure and the surrounding soil layer can be stressed together, which greatly improves the safety performance of the deep-ground hydrogen storage structure. Attached Figure Description

[0027] Figure 1 is a cross-sectional view of the deep-ground hydrogen storage reservoir structure provided in an embodiment of the present invention;

[0028] Figure 2 is a partial schematic diagram of the deep underground hydrogen storage structure in Figure 1;

[0029] Figure 3 is a schematic diagram of the support arm in Figure 1;

[0030] Figure 4 is a schematic diagram of the hydrogen barrier layer in Figure 1;

[0031] Figure 5 is a schematic diagram of the hydrogen-blocking arc plate in Figure 4;

[0032] Figure 6 is a schematic diagram of a welding robot provided in one embodiment;

[0033] Figure 7 is a schematic diagram of a welding robot provided in another embodiment;

[0034] Figure 8 is a partial cross-sectional view of the welding robot in Figure 6;

[0035] Figure 9 is a partial schematic diagram of the welding robot in Figure 8;

[0036] Figure 10 is a partial schematic diagram of the extrusion section in Figure 8;

[0037] Figure 11 is a schematic diagram of the welding robot preheating the weld seam in Figure 6;

[0038] Figure 12 is a schematic diagram of the welding robot extruding welding material into the weld seam as shown in Figure 6.

[0039] Figure 13 is a schematic diagram of the welding robot smoothing the weld at the weld seam as shown in Figure 6.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Concrete lining layer; 1a. Cavity; 2. Hydrogen barrier layer; 21. Hydrogen barrier arc plate; 21a. Mortise and tenon joint; 22. Tenon; 23. Welding end; 24. Welding side; 24a. Weld; 3. Connecting frame; 31. Reinforcing cage; 4. Support arm; 4a. Grouting port; 41. Connecting end; 42. Soil end; 43. Hollow anchor bolt; 44. Anchor bolt pad; 5. Steel lining layer; 10. Trolley; 20. Robotic arm; 201. Moving end; 30. Welding torch; 30a. Material passage; 301. Welding end; 302. Feeding end; 302a, Feed inlet; 302b, Air inlet; 40, Heating section; 401, Insulation cylinder; 402, Electric heating ring; 50, Hot air blower; 501, Main hot air pipe; 502, Branch hot air pipe; 60, Welding material bin; 70, Extrusion section; 701, Drive motor; 702, Drive screw; 703, Extrusion rod; 7031, Extrusion end; 704, Transmission nut; 705, Return spring; 80, Mounting box; 90, Electric push rod; 901, Spreading head; 902, Telescopic rod; 903, Slider. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 merely illustrative and not intended to limit the invention.

[0043] To address the technical problem that the initial support layer of existing hydrogen storage structures lacks coordinated stress distribution with the inner wall of the mine, thus hindering the improvement of the safety performance of hydrogen storage structures, this invention provides a deep-ground hydrogen storage structure that enables coordinated stress distribution between the deep-ground hydrogen storage structure and the surrounding rock and soil layers, significantly improving the safety performance of deep-ground hydrogen storage structures.

[0044] Please refer to Figures 1 and 2, which are schematic diagrams of a deep-ground hydrogen storage structure according to an embodiment of the present invention. The deep-ground hydrogen storage structure includes a concrete lining layer 1, a hydrogen barrier layer 2, a connecting frame 3, and multiple support arms 4. The concrete lining layer 1 has a cavity 1a. The hydrogen barrier layer 2 is attached to the inner wall of the cavity 1a. The connecting frame 3 is located inside the concrete lining layer 1 and surrounds the periphery of the cavity 1a. Multiple support arms 4 are spaced apart on the periphery of the cavity 1a. Each support arm 4 has a connecting end 41 and a soil end 42, and is provided with a pouring channel connecting the connecting end 41 and the soil end 42. The connecting end 41 is located in the concrete lining layer 1 and connects to the connecting frame 3. The soil end 42 is located outside the concrete lining layer 1. The pouring channel has a grout inlet located at the connecting end 41 and a grouting port 4a located at the soil end 42.

[0045] In the deep-ground hydrogen storage structure provided by this invention, the connecting end 41 of the support arm 4 extends into the concrete lining layer 1, and a connecting frame 3 is set in the concrete lining layer 1. The connecting end 41 of the support arm 4 is fixedly connected to the connecting frame 3 to ensure the connection strength of the support arm 4 and the strength of the concrete lining layer 1. At the same time, the soil end 42 of the support arm 4 is inserted into the soil layer, and a pouring channel is set in the support arm 4. Grouting can be performed on the soil layer around the soil end 42 through the pouring port of the pouring channel, so that the deep-ground hydrogen storage structure and the surrounding soil layer can be stressed together, which greatly improves the safety performance of the deep-ground hydrogen storage structure. It should be noted that in this embodiment, the cavity 1a is cylindrical. In addition, each support arm 4 extends in a direction away from the cavity 1a, and its soil end 42 is used to insert into the soil layer.

[0046] In one embodiment, referring to Figure 3, the support arm 4 includes a hollow anchor rod 43 and an anchor rod pad 44. A connecting end 41 and a soil / rock end 42 are formed at both ends of the hollow anchor rod 43, and the hollow channel of the hollow anchor rod 43 constitutes a casting channel. The connecting end 41 extends to the side of the connecting frame 3 near the cavity 1a, and the anchor rod pad 44 is located on the side of the connecting frame 3 near the cavity 1a, and connects the connecting end 41 and the connecting frame 3.

[0047] In this embodiment, the hollow anchor rod 43 is connected to the connecting frame 3 via an anchor rod pad 44. The anchor rod pad 44 is located at the connecting end 41 of the hollow anchor rod 43, improving the end stress, enhancing the support effect on the rock wall, and facilitating the transfer of prestress through the hollow anchor rod 43. It should be noted that the form of the connecting frame 3 is not limited, as long as it can strengthen the concrete lining layer 1 and improve the connection strength of the hollow anchor rod 43. In one embodiment, the connecting frame 3 is in the form of reinforcing fibers; in another embodiment, the connecting frame 3 is in the form of a steel plate with through holes corresponding to the hollow anchor rod 43. In this embodiment, the connecting frame 3 is in the form of a reinforcing cage 31.

[0048] In one embodiment, a plurality of grouting ports 4a are provided, and the plurality of grouting ports 4a are spaced apart along the circumferential and / or extending direction of the support arm 4.

[0049] In this embodiment, multiple grouting ports 4a are spaced apart along the circumference and axial direction of the hollow anchor rod 43, so that the soil end 42 of the hollow anchor rod 43 can be uniformly consolidated with the soil layer, further improving the synergistic force-bearing effect between the hollow anchor rod 43 and the soil layer.

[0050] In one embodiment, the deep-ground hydrogen storage structure also includes a steel liner 5, which surrounds the periphery of the cavity 1a and is located between the concrete lining layer 1 and the hydrogen barrier layer 2.

[0051] In this embodiment, a steel lining layer 5 is also provided between the concrete lining layer 1 and the hydrogen barrier layer 2 to further improve the barrier capability for hydrogen storage and achieve good sealing of high-pressure hydrogen. It should be noted that in this solution, the hydrogen barrier layer 2 is a polymer hydrogen barrier layer 2, and it is bonded to the inner surface of the steel lining layer 5 with epoxy resin adhesive to form a double sealing structure.

[0052] In one embodiment, please refer to FIG4, the hydrogen barrier layer 2 includes multiple sets of hydrogen barrier arc plates 21, which are arranged sequentially along the axial direction of the cavity 1a. Each set of hydrogen barrier arc plates 21 has multiple hydrogen barrier arc plates 21, and the multiple hydrogen barrier arc plates 21 in the same set are arranged sequentially along the circumference of the cavity 1a.

[0053] In this embodiment, the hydrogen barrier layer 2 is configured as multiple sets of annularly arranged hydrogen barrier arc plates 21 for easy assembly, and each set of hydrogen barrier arc plates 21 is configured as multiple splicable units to improve transportation and construction convenience. It should be noted that in this solution, the hydrogen barrier arc plates 21 are made of polymer materials to improve the ability to block hydrogen molecule escape.

[0054] In one embodiment, please refer to Figure 5, each hydrogen-blocking arc plate 21 is provided with a tenon 22 and a mortise 21a at both ends of the cavity 1a in the circumferential direction, and the tenon 22 can be inserted into the adjacent mortise 21a in the same group.

[0055] In this embodiment, tenons 22 and mortises 21a are respectively provided at both ends of each hydrogen-blocking arc plate 21 in the circumferential direction, so that during assembly, the tenons 22 can be inserted into the mortises 21a of adjacent hydrogen-blocking arc plates 21 to realize the splicing and positioning of the polymer hydrogen-blocking arc plates 21, thereby improving the convenience and stability of assembly.

[0056] In one embodiment, each hydrogen-blocking arc plate 21 has two welding ends 23 at both ends in the circumferential direction of the cavity 1a. The welding ends 23 are inclined from the side away from the cavity 1a to the side close to the cavity 1a in the direction close to the other welding end 23 to form a welding side 24.

[0057] In this embodiment, a welding side surface 24 is also provided at the circumferential end of the hydrogen-blocking arc plate 21, so that when welding two adjacent hydrogen-blocking arc plates 21, the solder is plated on the corresponding two welding side surfaces 24, thereby expanding the welding area and improving the connection strength between the hydrogen-blocking arc plates 21.

[0058] In one embodiment, two adjacent welding sides 24 in the same group form a weld 24a when spliced, and the angle of the weld 24a is α, which satisfies 45°≤α≤60°.

[0059] In this embodiment, the angle of the weld 24a is controlled between 45° and 60° to avoid the end of the hydrogen-blocking arc plate 21 becoming too thin and reducing its strength, while ensuring that the welded side 24 has a sufficiently large surface area, thereby expanding the welding surface. At the same time, a weld 24a with a suitable angle ensures that the solder can just fill the weld 24a after welding, without protruding into the cavity 1a.

[0060] Furthermore, the present invention also provides a construction method for a deep-ground hydrogen storage structure, used for the aforementioned deep-ground hydrogen storage structure, the construction method comprising the following steps:

[0061] Excavate the earthwork required for cavity 1a according to the drawings, and install multiple support arms 4 in a circular array around the axis of cavity 1a. Then, tie and install the connecting frame 3 according to the design requirements, and connect the connecting end 41 to the connecting frame 3. Then, inject concrete grout into the pouring channel through the grout inlet, so that the concrete grout is injected into the surrounding rock and soil layer through the grouting port 4a.

[0062] According to the design requirements, a ring support is set on the inner side of the cavity 1a, and the ring support is used as the inner formwork for concrete pouring to form the concrete lining layer 1.

[0063] After the concrete lining layer 1 is formed, the ring support is removed, and the inner wall of the cavity 1a is ground and cleaned. Then, the hydrogen barrier layer 2 is glued to the inner wall of the cavity 1a.

[0064] It should be noted that, based on the embodiment with steel lining layer 5, the specific construction method is as follows:

[0065] S1. Installation of Support Structure: Excavate the soil inside the deep-ground hydrogen storage structure according to the drawings. Install multiple hollow anchor rods 43 in a circular array along the axis of the deep-ground hydrogen storage structure towards the surrounding soil and rock layers. Then, tie and install the steel cage 31 inside the high-performance concrete lining layer 1 according to the design requirements. Weld the anchor plate 44 at the upper end of the hollow anchor rod 43 to the steel cage 31. Finally, use a grouting machine to inject grout into the surrounding soil and rock layers through the grouting port 4a at the lower end of the hollow anchor rod 43 to reinforce the structure, thus completing the construction of the hollow anchor rod 43.

[0066] S2. Install steel liner 5: manufacture and install steel liner 5 in the steel plate processing plant according to the design requirements, and use mechanical equipment to push the steel liner 5 as a whole into the deep underground hydrogen storage chamber to complete the construction of steel liner 5.

[0067] S3. Install high-performance concrete lining layer 1: According to the design requirements, multiple ring supports are erected inside the steel lining layer 5 to support and reinforce the steel lining layer 5. The steel lining layer 5 is used as the inner formwork for pouring high-performance concrete. The high-performance concrete is compacted and cured using a vibrator. The construction of high-performance concrete lining layer 1 is thus completed.

[0068] S4. Install the polymer hydrogen barrier layer 2: Remove the annular support inside the steel liner 5 from the inside out, then grind and clean the inside of the steel liner 5, apply epoxy resin adhesive to attach and fix the polymer hydrogen barrier arc plate 21, and then use a welding robot to weld and fix the circumferentially spliced ​​polymer hydrogen barrier arc plate 21 to form the overall polymer hydrogen barrier layer 2, thus completing the construction of the deep underground hydrogen storage structure.

[0069] Furthermore, it should be noted that when welding the hydrogen-blocking arc plate 21, the V-shaped weld 24a between the circumferentially spliced ​​polymer hydrogen-blocking arc plates 21 is first preheated to make its surface molten. Simultaneously, the solder is preheated, then forced to overflow, and after being heated to a molten state, it is extruded to fill the V-shaped weld 24a. Finally, the solder at the V-shaped weld 24a is smoothed and leveled to prevent poor welding quality due to uneven solder distribution.

[0070] To better understand the present invention, the technical solution of the present invention will be described in detail below with reference to Figures 1 to 5:

[0071] In this scheme, the hollow anchor rod 43 and anchor rod pad 44 of the support arm 4 are fixedly connected to the steel cage 31 in the high-performance concrete lining layer 1. At the same time, the surrounding rock and soil layers can be reinforced by grouting through the grouting port 4a on the hollow anchor rod 43, so as to realize the deep underground hydrogen storage structure and the surrounding rock and soil layers to share the load, and significantly improve the safety performance of the deep underground hydrogen storage structure.

[0072] Furthermore, the polymer hydrogen barrier layer 2 is constructed from multiple interlocking arc-shaped hydrogen barrier plates 21, i.e., it is made of arc-shaped sheet material, which facilitates construction and shortens the construction period. These are then welded into a single structure using a welding robot, achieving excellent sealing against high-pressure hydrogen. Simultaneously, a tenon 22 and tenon groove 21a connection structure is provided between adjacent polymer materials, enabling rapid positioning and tight bonding of the polymer materials, reducing construction errors, and ensuring the effective construction of the polymer hydrogen barrier layer 2.

[0073] It should be noted that, referring to Figures 6 to 8, the welding robot mentioned above includes a trolley 10, a robotic arm 20, a welding torch 30, a heating unit 40, a hot air blower 50, a main hot air pipe 501, and a branch hot air pipe 502; the robotic arm 20 is mounted on the trolley 10 and has a robotic arm 20 capable of moving relative to the trolley 10; the welding torch 30 is located on the robotic arm 20 and has a material feeding channel 30a for conveying welding material, and has welding ends 301 and 302 located at both ends thereon; the heating unit 40 is located on the welding torch 30 and is located between the welding ends 301 and 302; the hot air blower 50 is located on the robotic arm 20; the main hot air pipe 501 is connected to the air outlet of the hot air blower 50, and its air outlet direction is the same as the material outlet direction of the welding torch 30; the branch hot air pipe 502 connects the air outlet of the hot air blower 50 and the welding end 302.

[0074] When the welding robot 100 is working, it first moves the robotic arm 20 to a position near the welding area via the trolley 10, and then adjusts the robotic arm 20 to move it to the weld seam 24a. Then, it starts the hot air blower 50 and blows part of the hot air through the hot air main pipe 501 to the weld seam 24a to preheat the weld seam 24a so that its surface is in a molten state. At the same time, another part of the hot air from the hot air blower 50 is blown through the hot air main pipe 501 to the welding end 302 of the welding torch 30 to preheat the solder that is being fed to the material feeding channel 30a. This allows the solder to be quickly heated to a molten state by the heating unit 40 as it moves to the welding end 301. Finally, the solder is discharged from the welding end 301 and fills the weld seam 24a, completing the welding. This solution can simultaneously preheat both the weld seam 24a and the solder, improving welding efficiency and quality. It also has a relatively simple structure, saving investment costs. Furthermore, by filling the weld seam 24a with solder, it can directly weld non-conductive polymer materials, making it highly applicable.

[0075] It should be noted that, in one embodiment, the robotic arm 20 includes at least two connecting arms, and the two connecting arms at both ends are capable of moving relative to each other in any direction, allowing the moving end 201 of the robotic arm 20 to move relative to the trolley 10 in any direction. Furthermore, one connecting arm is mounted on the trolley 10 via a rotating base. Specifically, the connecting arm is hinged to the rotating base via an ear plate. It should be understood that the specific structure and working principle of the robotic arm 20 are prior art and will not be elaborated upon here.

[0076] In one embodiment, the welding robot 100 further includes a solder bin 60 and an extrusion section 70. The solder bin 60 is located on the robotic arm 20 and is connected to the welding end 302. The extrusion section 70 is located on the welding gun 30 and is used to drive the solder to move from the welding end 302 toward the welding end 301.

[0077] In this embodiment, the solder bin 60 is also located in the robotic arm 20, so that the solder can continuously enter the feeding channel 30a of the welding gun 30, and the solder in the feeding channel 30a is driven to move towards the welding end 301 by the extrusion part 70, thereby improving the degree of automation.

[0078] It should be noted that the configuration of the extrusion section 70 is not limited, as long as it can drive the solder from the welding end 302 to the welding end 301. In one embodiment, the extrusion section 70 is configured as an extrusion electric push rod, which extrudes the solder by pushing the push rod. In another embodiment, the extrusion section 70 is configured as a hydraulic push rod, which also extrudes the solder by pushing the push rod.

[0079] In one embodiment, as shown in Figures 8 to 10, the extrusion section 70 includes a drive motor 701, a drive screw 702, an extrusion rod 703, and a transmission nut 704. The drive motor 701 is mounted on the robotic arm 20. The drive screw 702 is connected to the output shaft of the drive motor 701 and extends along the arrangement direction of the welding ends 302 and 301. One end of the extrusion rod 703 passes through the material feeding channel 30a and can move along its axial direction. The other end is located outside the material feeding channel 30a. The transmission nut 704 is sleeved on the drive screw 702 and connected to the end of the extrusion rod 703 located outside the material feeding channel 30a, for converting the rotation of the drive screw 702 into the movement of the extrusion rod 703 along its axial direction.

[0080] In this embodiment, the output shaft of the drive motor 701 rotates, thereby driving the drive screw 702 to rotate synchronously. Through the cooperation between the drive screw 702 and the transmission nut 704, the rotation of the drive screw 702 is converted into the linear movement of the extrusion rod 703, thereby realizing extrusion. At the same time, the drive motor 701 is kept away from the heat source, and the structure is stable and reliable.

[0081] In one embodiment, the welding robot 100 further includes a mounting box 80, which is mounted on the robotic arm 20 and has a mounting cavity. The mounting box 80 is provided with a communication hole connecting the outside to the mounting cavity along the direction close to the welding end 302. The drive motor 701, the drive screw 702 and the transmission nut 704 are located in the mounting cavity, and the end of the extrusion rod 703 located outside the material feeding channel 30a extends into the mounting cavity through the communication hole.

[0082] In this embodiment, the drive motor 701, drive screw 702 and transmission nut 704 are placed in the mounting cavity of the mounting box 80 to protect the above-mentioned components.

[0083] In one embodiment, the inner wall of the mounting cavity and one of the extrusion rods 703 are provided with a limiting groove, and the other is provided with a limiting block. The limiting groove extends along the axial direction of the extrusion rod 703, and the limiting block is engaged in the limiting groove to restrict the extrusion rod 703 from rotating about its axial direction.

[0084] In this embodiment, the limiting groove and the limiting block cooperate to restrict the extrusion rod 703 from being synchronously driven to rotate by the drive screw 702, so as to ensure that the transmission nut 704 can stably convert the rotation of the drive screw 702 into the linear movement of the extrusion rod 703, thereby improving stability.

[0085] In one embodiment, referring to Figures 8 and 9, the end of the extrusion rod 703 located in the material feeding channel 30a is the extrusion end 7031, and the welding end 302 is provided with a feed port 302a that connects to the solder bin 60. The connection between the hot air branch pipe 502 and the welding end 302 is located on the side of the feed port 302a closer to the welding end 301. The extrusion part 70 also includes a return spring 705, which is connected to the robotic arm 20 and the transmission nut 704 and is used to drive the extrusion end 7031 to return from the position close to the welding end 301 to the side of the feed port 302a away from the welding end 301.

[0086] In this embodiment, the welding end 302 is provided with an air inlet 302b, which is spaced apart from the feed inlet 302a on the side near the welding end 301 and connected to the hot air branch pipe 502. After the extrusion rod 703 extrudes the solder at the front end of the feeding channel 30a, the drive motor 701 stops driving the extrusion rod 703 to continue moving towards the welding end 301. The extrusion rod 703 can quickly return to its original position under the action of the return spring 705, so that the extrusion end 7031 is on the side of the feed inlet 302a away from the air inlet 302b, ensuring that the solder stably enters the feeding channel 30a and is preheated. It should be noted that, in one embodiment, the torque of the return spring 705 is greater than the starting torque of the drive motor 701 and less than the working torque of the drive motor 701, so as to drive the extrusion rod 703 to return to its original position.

[0087] In one embodiment, the welding robot 100 further includes an electric push rod 90 and a coating head 901. The electric push rod 90 is disposed on the robotic arm 20, and its telescopic rod 902 extends and retracts along the arrangement direction of the welding end 302 and the welding end 301. The coating head 901 is installed at the end of the telescopic rod 902.

[0088] In this embodiment, the robotic arm 20 is also equipped with an electric push rod 90 and a coating head 901. In this way, after the welding gun 30 fills the weld seam 24a with solder, the robotic arm 20 and the electric push rod 90 can work together to drive the coating head 901 to coat the solder at the weld seam 24a evenly, so as to prevent poor welding quality caused by uneven solder.

[0089] In one embodiment, the applicator 901 and the hot air main pipe 501 are respectively located on opposite sides of the welding torch 30 in the radial direction and are spaced apart from the welding torch 30.

[0090] In this embodiment, the hot air main pipe 501 and the coating head 901 are placed on both sides of the welding torch 30 in the radial direction. When the robotic arm 20 moves the welding torch 30 toward the side where the hot air main pipe 501 is located, the hot air main pipe 501 first preheats the weld 24a, then the welding torch 30 outputs the solder, and finally the coating head 901 smooths the solder, making the whole process smoother and further improving the welding quality and efficiency.

[0091] In one embodiment, the outer wall of the welding torch 30 and the telescopic rod 902 are provided with a groove, and the other is provided with a slider 903. The groove extends along the axial direction of the telescopic rod 902, and the slider 903 is disposed in the groove.

[0092] In this embodiment, a slider 903 and a groove are provided between the welding torch 30 and the telescopic rod 902 of the electric push rod 90 to guide and support the telescopic rod 902, ensuring the smooth application of solder by the coating head 901.

[0093] It should be noted that the configuration of the heating element 40 is not limited, as long as it can heat the solder in the welding torch 30 to a molten state. In one embodiment, the heating element 40 is configured as electromagnetic heating, while in another embodiment, the heating element 40 is configured as fuel heating.

[0094] In one embodiment, the heating part 40 includes a heat preservation cylinder 401 and a plurality of electric heating rings 402. The heat preservation cylinder 401 is sleeved on the outside of the welding gun, and the plurality of electric heating rings 402 are arranged around the welding gun 30 and spaced apart along the arrangement direction of the welding end 302 and the welding end 301, and are located inside the heat preservation cylinder 401.

[0095] In this embodiment, the heating part 40 is configured as a heat preservation cylinder 401 and multiple electric heating rings 402. The electric heating rings 402 generate heat to heat the solder in the welding gun 30, and the heat preservation cylinder 401 provides heat insulation and keeps the solder warm, thereby accelerating the heating speed of the solder.

[0096] The technical solution of the welding robot is described in detail with reference to Figures 6 to 13:

[0097] First, the weld seam 24a between the circumferentially spliced ​​hydrogen-blocking arc plates 21 is preheated by the hot air main pipe 501 connected to the hot air blower 50, so that its surface is in a molten state. At the same time, the solder entering the material feeding channel 30a is preheated by the hot air branch pipe 502 connected to the hot air blower 50. Then, the drive motor 701 is started to drive the drive screw 702 to rotate, which in turn drives the extrusion rod 703 to push the preheated solder forward. After the solder is heated to a molten state by the electric heating ring 402, it is extruded and fills the weld seam 24a. Finally, the electric push rod 90 is started to drive the coating head 901 to coat and smooth the solder at the weld seam 24a, so as to prevent poor welding quality caused by uneven solder.

[0098] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A deep geohydrogen storage structure, characterized by, include: The concrete lining layer has a cavity; A hydrogen barrier layer is attached to the inner wall of the cavity; A connecting frame is provided within the concrete lining layer and surrounds the periphery of the cavity; and Multiple support arms are spaced apart around the periphery of the cavity. Each support arm has a connecting end and a soil / rock end, and is provided with a pouring channel connecting the connecting end and the soil / rock end. The connecting end is located in the concrete lining layer and is connected to the connecting frame. The soil / rock end is located outside the concrete lining layer. The pouring channel has a grout inlet located at the connecting end and a grout injection port located at the soil / rock end.

2. The underground hydrogen storage structure according to claim 1, wherein The support arm includes a hollow anchor rod and an anchor rod pad. The connecting end and the soil end are formed at both ends of the hollow anchor rod, and the hollow channel of the hollow anchor rod constitutes the pouring channel. The connecting end extends through the connecting frame to the side near the cavity, and the anchor plate is located on the side of the connecting frame near the cavity, connecting the connecting end and the connecting frame.

3. The underground hydrogen storage structure of claim 1, wherein The grouting ports are provided in multiple locations, and the multiple grouting ports are spaced apart along the circumferential and / or extending direction of the support arm.

4. The underground hydrogen storage structure of claim 1, wherein The deep-ground hydrogen storage structure also includes a steel liner, which surrounds the periphery of the cavity and is located between the concrete lining layer and the hydrogen barrier layer.

5. The underground hydrogen storage structure of claim 1, wherein The hydrogen barrier layer includes multiple sets of hydrogen barrier arc plates, which are arranged sequentially along the axial direction of the cavity. Each set of hydrogen barrier arc plates has multiple hydrogen barrier arc plates, and the multiple hydrogen barrier arc plates in the same set are arranged sequentially along the circumference of the cavity.

6. The underground hydrogen storage structure of claim 5, wherein Each of the hydrogen-blocking arc-shaped plates is provided with a tenon and a mortise at both ends of the cavity in the circumferential direction, and the tenon can be inserted into the adjacent mortise in the same group.

7. The underground hydrogen storage structure according to claim 5 or 6, wherein Each of the hydrogen-blocking arc-shaped plates has welding ends at both ends in the circumferential direction of the cavity. The welding ends are inclined from the side away from the cavity to the side close to the cavity along the direction close to the other welding end to form a welding side.

8. The underground hydrogen storage structure according to claim 7, wherein When two adjacent welding sides in the same group are joined together, a weld is formed, and the angle of the weld is α, which satisfies 45°≤α≤60°.

9. The underground hydrogen storage structure of claim 1, wherein The connecting frame is a steel cage disposed within the concrete lining layer; and / or... The cavity is cylindrical.

10. A method for constructing a deep geohydrogen storage structure for a deep geohydrogen storage structure as claimed in any one of claims 1 to 9, characterized in that The construction method for the deep-ground hydrogen storage structure includes the following steps: Excavate the earthwork required for the cavity according to the drawings, and install multiple support arms in a circular array around the cavity as the axis. Then, tie and install the connecting frame according to the design requirements, and connect the connecting end to the connecting frame. Then, inject concrete grout into the pouring channel through the grout inlet, so that the concrete grout is injected into the surrounding soil layer through the grouting port. According to the design requirements, an annular support is set on the inner side of the cavity, and the annular support is used as an inner template for concrete pouring to form the concrete lining layer. After the concrete lining layer is formed, the annular support is removed, the inner wall of the cavity is ground and cleaned, and then the hydrogen barrier layer is glued to the inner wall of the cavity.

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