Deep ground hydrogen storage library structure and construction method thereof

Abstract

The invention discloses a deep ground hydrogen storage warehouse structure and a construction method thereof. The deep ground hydrogen storage warehouse structure comprises a concrete lining layer, a hydrogen resisting layer, a connecting framework and a plurality of supporting arms. The concrete lining layer is provided with a containing cavity; the hydrogen resisting layer is attached to the inner wall of the containing cavity; the connecting framework is arranged in the concrete lining layer and arranged on the peripheral side of the containing cavity in a surrounding mode. The supporting arms are arranged on the peripheral side of the containing cavity at intervals, each supporting arm is provided with a connecting end and a rock-soil end and is provided with a pouring runner communicating the connecting end with the rock-soil end, the connecting ends are located on the concrete lining layer and connected with the connecting framework, the rock-soil ends are located outside the concrete lining layer, and the pouring runners are provided with slurry inlets located in the connecting ends; and a grouting opening positioned at the rock-soil end is formed. According to the scheme, grouting reinforcement can be conducted on the rock-soil layer around the rock-soil end through the pouring opening of the pouring runner, cooperative stress of the deep ground hydrogen storage bank structure and the surrounding rock-soil layer is achieved, and the safety performance of the deep ground hydrogen storage bank structure is greatly improved.

Description

Technical Field

[0001] The present invention relates to, in particular to a deep underground hydrogen storage structure. Background Art

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

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

[0004] However, during the construction of the initial support layer in this patent, the initial support layer formwork is set up, the drainage structure is arranged at the designated position and geotextile is used for isolation and filtration, and finally the concrete is poured and cured to form. The initial support layer and the inner wall of the mine tunnel have no coordinated force, and the safety performance of the hydrogen storage tank structure needs to be improved. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a deep underground hydrogen storage structure to solve the technical problems in the prior art that the initial support layer of the hydrogen storage structure and the inner wall of the mine cave have no coordinated force and the safety performance of the hydrogen storage structure needs to be improved.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a deep underground hydrogen storage structure, comprising: A concrete lining layer having a cavity; A hydrogen barrier layer is attached to the inner wall of the cavity; A connecting frame is arranged in the concrete lining layer and surrounds the periphery of the cavity; and A plurality of support arms are arranged at intervals on the circumferential side of the cavity, each of the support arms has a connecting end and a geotechnical end, and is provided with a casting flow channel connecting the connecting end and the geotechnical end, the connecting end is located in the concrete lining layer and connected to the connecting skeleton, the geotechnical end is located outside the concrete lining layer, and the casting flow channel has a grouting port located at the connecting end and a grouting port located at the geotechnical end.

[0007] In some embodiments, the support arm includes a hollow anchor rod and an anchor rod pad, the connection end and the rock end are formed at both ends of the hollow anchor rod, and the hollow channel of the hollow anchor rod constitutes the casting flow channel; Wherein, the connecting end is passed through a side of the connecting frame close to the cavity, and the anchor pad is located on a side of the connecting frame close to the cavity, and connects the connecting end and the connecting frame.

[0008] In some embodiments, a plurality of grouting ports are provided, and the plurality of grouting ports are spaced apart along the circumference and / or extension direction of the support arm.

[0009] In some embodiments, the deep underground hydrogen storage structure further includes a steel lining layer, which is arranged around the periphery of the cavity and is located between the concrete lining layer and the hydrogen barrier layer.

[0010] In some embodiments, the hydrogen barrier layer includes multiple groups of hydrogen barrier arc plates, which are arranged in sequence along the axial direction of the cavity. Each group of hydrogen barrier arc plates is provided with multiple hydrogen barrier arc plates, and the multiple hydrogen barrier arc plates in the same group are arranged in sequence along the circumference of the cavity.

[0011] In some embodiments, each of the hydrogen-blocking arc-shaped plates is provided with a tenon and a tenon groove at both ends of the cavity in the circumferential direction, respectively, and the tenon can be inserted into the adjacent tenon grooves of the same group.

[0012] In some embodiments, both ends of each hydrogen-blocking arc plate in the circumferential direction of the cavity are welding ends, and the welding ends are inclined from a side away from the cavity to a side close to the cavity along a direction close to the other welding end to form a welding side.

[0013] In some embodiments, two adjacent welding side surfaces in the same group form a weld when spliced, and the angle of the weld is α, satisfying 45°≤α≤60°.

[0014] In some embodiments, the connection frame is a steel cage disposed in the concrete lining layer; and / or, The containing cavity is cylindrical.

[0015] In addition, the present invention also provides a construction method for a deep underground hydrogen storage structure, which is used for the deep underground hydrogen storage structure as described in any one of the above, and the construction method for the deep underground hydrogen storage structure comprises the steps of: Excavate the earthwork required for the cavity according to the requirements of the drawings, and install a plurality of the support arms in a circular array along the axis of the cavity to the surrounding rock and soil layers, then tie and install the connection frame according to the design requirements, and connect the connection end to the connection frame, and then inject concrete slurry into the casting flow channel through the grouting port, so that the concrete slurry is grouted into the surrounding rock and soil layers through the grouting port; According to the design requirements, an annular support is arranged inside the cavity, and the annular support is used as an inner formwork for pouring concrete 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 polished and cleaned, and then the hydrogen barrier layer is glued to the inner wall of the cavity.

[0016] Compared with the prior art, in the deep underground hydrogen storage structure provided by the present invention, the connecting end of the support arm is extended into the concrete lining layer, and a connecting skeleton is arranged in the concrete lining layer, and the connecting end of the support arm is fixedly connected to the connecting skeleton to ensure the connection strength of the support arm and the strength of the concrete lining layer; at the same time, the rock and soil end of the support arm is inserted into the rock and soil layer, and a casting flow channel is arranged in the support arm, and the rock and soil layer around the rock and soil end can be grouting reinforced through the casting port of the casting flow channel, so as to realize the coordinated force between the deep underground hydrogen storage structure and the surrounding rock and soil layers, and greatly improve the safety performance of the deep underground hydrogen storage structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of a deep underground hydrogen storage structure provided by an embodiment of the present invention; Figure 2 yes Figure 1 A partial schematic diagram of the structure of a mid-depth underground hydrogen storage facility; Figure 3 yes Figure 1 Schematic diagram of the middle support arm; Figure 4 yes Figure 1 Schematic diagram of the middle hydrogen barrier layer; Figure 5 yes Figure 4 Schematic diagram of the medium hydrogen-blocking curved plate; Figure 6 is a schematic diagram of a welding robot provided in one embodiment; Figure 7 is a schematic diagram of a welding robot provided in another embodiment; Figure 8 yes Figure 6 A partial cross-sectional view of the welding robot; Fig. 9 yes Figure 8 A partial schematic diagram of the welding robot; Fig.10 yes Figure 8 A partial schematic diagram of the middle extrusion section; Fig.11 yes Figure 6 Schematic diagram of the welding robot preheating the weld area; Fig.12 yes Figure 6 Schematic diagram of the welding robot extruding solder toward the weld; Fig.13 yes Figure 6 Schematic diagram of the welding robot smoothing the solder at the weld seam.

[0018] Description of reference numerals: 1. Concrete lining layer; 1a. Cavity; 2. Hydrogen barrier layer; 21. Hydrogen barrier arc plate; 21a. Tenon; 22. Tenon; 23. Welding end; 24. Welding side; 24a. Welding seam; 3. Connecting skeleton; 31. Steel cage; 4. Support arm; 4a. Grouting port; 41. Connecting end; 42. Geotechnical end; 43. Hollow anchor rod; 44. Anchor rod pad; 5. Steel lining layer; 10. Trolley; 20. Robot arm; 201. Mobile end; 30. Welding gun; 30a. Material passage; 301. Welding end; 302. Feed end; 302a, feed port; 302b, air inlet; 40, heating part; 401, insulation cylinder; 402, electric heating ring; 50, hot air blower; 501, hot air main pipe; 502, hot air branch pipe; 60, solder bin; 70, extrusion part; 701, drive motor; 702, drive screw; 703, extrusion rod; 7031, extrusion end; 704, transmission nut; 705, reset spring; 80, installation box; 90, electric push rod; 901, coating head; 902, telescopic rod; 903, slider. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem in the prior art that the initial support layer of the hydrogen storage reservoir structure and the inner wall of the mine tunnel are not subjected to coordinated force, and the safety performance of the hydrogen storage reservoir structure needs to be improved, the present invention provides a deep underground hydrogen storage reservoir structure, which can achieve coordinated force between the deep underground hydrogen storage reservoir structure and the surrounding rock and soil layers, thereby greatly improving the safety performance of the deep underground hydrogen storage reservoir structure.

[0021] See also Figure 1 and Figure 2 , Figure 1 and Figure 2 It is a structural schematic diagram of a deep underground hydrogen storage structure in an embodiment of the present invention, wherein the deep underground hydrogen storage structure comprises a concrete lining layer 1, a hydrogen barrier layer 2, a connecting skeleton 3 and a plurality of supporting 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 skeleton 3 is arranged in the concrete lining layer 1 and is arranged around the cavity 1a; a plurality of supporting arms 4 are arranged at intervals around the cavity 1a, each supporting arm 4 has a connecting end 41 and a rock and soil end 42, and a casting flow channel connecting the connecting end 41 and the rock and soil end 42 is provided, the connecting end 41 is located in the concrete lining layer 1 and is connected to the above-mentioned connecting skeleton 3, the rock and soil end 42 is located outside the concrete lining layer 1, the casting flow channel has a slurry inlet located at the connecting end 41, and has a grouting port 4a located at the rock and soil end 42.

[0022] In the deep hydrogen storage structure provided by the present invention, the connecting end 41 of the support arm 4 is extended into the concrete lining layer 1, and a connecting skeleton 3 is arranged in the concrete lining layer 1, and the connecting end 41 of the support arm 4 is fixedly connected to the connecting skeleton 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 rock and soil end 42 of the support arm 4 is inserted into the rock and soil layer, and a casting flow channel is arranged in the support arm 4, and the rock and soil layer around the rock and soil end 42 can be grouting reinforced through the casting port of its casting flow channel, so as to realize the coordinated force of the deep hydrogen storage structure and the surrounding rock and soil layers, and greatly improve the safety performance of the deep hydrogen storage structure. It should be noted that in the present embodiment, the cavity 1a is cylindrical. In addition, each support arm 4 extends in a direction away from the cavity 1a, and its rock and soil end 42 is used to be inserted into the rock and soil layer.

[0023] In one embodiment, see Figure 3 The support arm 4 includes a hollow anchor rod 43 and an anchor rod pad 44, a connecting end 41 and a 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 flow channel; wherein, the connecting end 41 is penetrated to the side of the connecting skeleton 3 close to the cavity 1a, and the anchor rod pad 44 is located on the side of the connecting skeleton 3 close to the cavity 1a, and is connected to the above-mentioned connecting end 41 and the connecting skeleton 3.

[0024] In this embodiment, the hollow anchor rod 43 is connected to the connection frame 3 through the anchor rod pad 44. The anchor rod pad 44 is located at the connection end 41 of the hollow anchor rod 43 to improve the end force, enhance the support effect on the rock wall, and facilitate the transmission of prestress through the hollow anchor rod 43. It should be noted that the setting form of the connection frame 3 is not limited, as long as it can strengthen the strength of the concrete lining layer 1 and improve the connection strength of the hollow anchor rod 43. In one embodiment, the connection frame 3 is set in the form of reinforcing fiber; in another embodiment, the connection frame 3 is set as a steel plate, and a through hole is opened corresponding to the hollow anchor rod 43. In this embodiment, the connection frame 3 is set in the form of a steel cage 31.

[0025] In one embodiment, a plurality of grouting ports 4 a are provided, and the plurality of grouting ports 4 a are spaced apart along the circumference and / or extension direction of the supporting arm 4 .

[0026] 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 rock and soil end 42 of the hollow anchor rod 43 can be uniformly consolidated in the rock and soil layer, further improving the synergistic force between the hollow anchor rod 43 and the rock and soil layer.

[0027] In one embodiment, the deep underground hydrogen storage structure further includes a steel lining 5 , which is arranged around the circumference of the cavity 1 a and is located between the concrete lining layer 1 and the hydrogen barrier layer 2 .

[0028] In this embodiment, a steel lining layer 5 is further provided between the concrete lining layer 1 and the hydrogen barrier layer 2 to further improve the barrier capacity 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 is adhered to the inner surface of the steel lining layer 5 by epoxy resin adhesive to form a double sealing structure.

[0029] In one embodiment, see Figure 4 The hydrogen barrier layer 2 includes multiple groups of hydrogen barrier arc plates 21, which are arranged in sequence along the axial direction of the cavity 1a. Each group of hydrogen barrier arc plates 21 is provided with multiple hydrogen barrier arc plates 21, and the multiple hydrogen barrier arc plates 21 in the same group are arranged in sequence along the circumferential direction of the cavity 1a.

[0030] In this embodiment, the hydrogen barrier layer 2 is configured as a plurality of groups of annular hydrogen barrier arc plates 21 for easy assembly, and each group of hydrogen barrier arc plates 21 is configured as a plurality of connectable monomers to improve the convenience of transportation and construction. 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 the escape of hydrogen molecules.

[0031] In one embodiment, see Figure 5 Each hydrogen-blocking arc plate 21 is provided with a tenon 22 and a tenon groove 21a at both ends of the circumferential direction of the cavity 1a, respectively, and the tenon 22 can be inserted into the adjacent tenon grooves 21a of the same group.

[0032] In this embodiment, tenons 22 and tenons 21a are respectively provided at both ends of each hydrogen barrier arc plate 21 in the circumferential direction, so that during assembly, the tenons 22 can be inserted into the tenons 21a of the adjacent hydrogen barrier arc plates 21 to achieve the splicing and positioning of the polymer hydrogen barrier arc plates 21, thereby improving the convenience and stability during assembly.

[0033] In one embodiment, both ends of each hydrogen-blocking arc plate 21 in the circumferential direction of the cavity 1a are welding ends 23, and the welding ends 23 are inclined from a side away from the cavity 1a to a side close to the cavity 1a along a direction close to the other welding end 23 to form a welding side 24.

[0034] In this embodiment, welding side surfaces 24 are also provided at the circumferential ends of the hydrogen barrier arc plates 21 so that solder can be plated on the corresponding two welding side surfaces 24 when welding two adjacent hydrogen barrier arc plates 21 , thereby expanding the welding area and improving the connection strength between the hydrogen barrier arc plates 21 .

[0035] In one embodiment, two adjacent welding side surfaces 24 in the same group form a weld 24a when they are spliced ​​together, and the angle of the weld 24a is α, satisfying 45°≤α≤60°.

[0036] In this embodiment, the angle of the weld 24a is controlled between 45° and 60° to prevent the end of the hydrogen-blocking arc plate 21 from being too thin and reducing the strength, while making the welding side surface 24 have a sufficiently large surface area, thereby expanding the welding surface. At the same time, the weld 24a with a suitable angle can ensure that the solder can be just filled in the weld 24a after welding, and does not protrude into the cavity 1a.

[0037] In addition, the present invention also provides a construction method of a deep underground hydrogen storage structure, which is used for the deep underground hydrogen storage structure described above. The construction method of the deep underground hydrogen storage structure comprises the following steps: Excavate the earthwork required for the cavity 1a according to the requirements of the drawings, and install multiple support arms 4 in a circular array along the axis of the cavity 1a to the surrounding rock and soil layers, then tie and install the connecting frame 3 according to the design requirements, and connect the connecting end 41 to the connecting frame 3, and then inject concrete slurry into the casting flow channel through the slurry inlet, so that the concrete slurry is grouted into the surrounding rock and soil layers through the grouting port 4a; According to the design requirements, an annular support is arranged inside the cavity 1a, and the annular support is used as an inner formwork for pouring concrete to form a concrete lining layer 1; After the concrete lining layer 1 is formed, the annular support is removed, the inner wall of the cavity 1a is polished and cleaned, and then the hydrogen barrier layer 2 is glued to the inner wall of the cavity 1a.

[0038] It should be noted that, based on the embodiment of setting the steel lining 5, the specific construction method is as follows: S1. Install support structure: excavate the interior of the deep hydrogen storage structure according to the requirements of the drawings, install multiple hollow anchor rods 43 in a circular array along the axis of the deep hydrogen storage structure to the surrounding rock and soil 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 pad 44 at the upper end of the hollow anchor rod 43 to the steel cage 31, and finally use a grouting machine to grout the surrounding rock and soil layers through the grouting port 4a at the lower end of the hollow anchor rod 43 to complete the construction of the hollow anchor rod 43.

[0039] S2. Installing the steel lining 5: The steel lining 5 is manufactured and installed in a steel plate processing plant according to the design requirements, and the steel lining 5 is pushed into the deep underground hydrogen storage chamber as a whole using mechanical equipment to complete the construction of the steel lining 5.

[0040] S3. Install high-performance concrete lining layer 1: According to the design requirements, multiple annular supports are set up inside the steel lining layer 5 to support and strengthen the steel lining layer 5. The steel lining layer 5 is used as an inner formwork for pouring high-performance concrete. A vibrator is used to vibrate the high-performance concrete to make it dense and cure it to form it. At this point, the construction of the high-performance concrete lining layer 1 is completed.

[0041] S4. Installing the polymer hydrogen barrier layer 2: Remove the annular support inside the steel lining 5 from the inside to the outside, then polish and clean the inside of the steel lining 5, apply epoxy resin glue to stick and fix the polymer hydrogen barrier arc plate 21, and then use a welding robot to weld and fix the annularly spliced ​​polymer hydrogen barrier arc plates 21 in sequence to form an overall polymer hydrogen barrier layer 2, thus completing the construction of the deep underground hydrogen storage structure.

[0042] In addition, it should be noted that when welding the hydrogen-blocking arc plates 21, the V-shaped weld 24a between the circumferentially spliced ​​polymer hydrogen-blocking arc plates 21 is first preheated to make its surface molten. At the same time, the solder is preheated, and then the preheated solder is driven to continue to overflow, and after being heated to a molten state, it is squeezed out to fill the V-shaped weld 24a, and finally the solder at the V-shaped weld 24a is smeared and leveled to prevent the problem of poor welding quality caused by uneven solder.

[0043] In order to better understand the present invention, the following Figures 1 to 5 The technical solution of the present invention is described in detail: In this solution, the hollow anchor rod 43 and the 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 grouting reinforced through the grouting port 4a on the hollow anchor rod 43, so that the deep underground hydrogen storage reservoir structure and the surrounding rock and soil layers can be coordinated to bear force, greatly improving the safety performance of the deep underground hydrogen storage reservoir structure.

[0044] In addition, the polymer hydrogen barrier layer 2 is set as a plurality of splicable hydrogen barrier arc plates 21, that is, an arc-shaped sheet material is used, which is convenient for construction and has a short construction period. And it is welded into an integrated structure by a welding robot, which can achieve good sealing of high-pressure hydrogen. At the same time, a connection structure in which a tenon 22 and a tenon groove 21a are matched is set between adjacent polymer materials, which can achieve rapid positioning and close fitting of polymer materials, reduce construction errors, and ensure the construction effect of the polymer hydrogen barrier layer 2.

[0045] Please note that Figures 6 to 8 The welding robot comprises a trolley 10, a mechanical arm 20, a welding gun 30, a heating unit 40, a hot air blower 50, a hot air main pipe 501 and a hot air branch pipe 502; the mechanical arm 20 is installed on the trolley 10 and has a mechanical arm 20 that can move relative to the trolley 10; the welding gun 30 is arranged on the mechanical arm 20, and has a material feeding channel 30a for conveying solder, and has a welding end 301 and a welding end 302 located at both ends thereof; the heating unit 40 is arranged on the welding gun 30, and is located between the welding end 301 and the welding end 302; the hot air blower 50 is arranged on the mechanical arm 20; the hot air main 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 gun 30; the hot air branch pipe 502 connects the air outlet of the hot air blower 50 with the welding end 302.

[0046] When the welding robot 100 is working, the robot arm 20 is first moved to a position adjacent to the welding position by the trolley 10, and then the robot arm 20 is adjusted to move to the welding seam 24a; then the hot air blower 50 is started, and part of the hot air is blown to the welding seam 24a through the hot air pipe 501 to preheat the welding 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 to the welding end 302 of the welding gun 30 through the hot air pipe 501 to preheat the solder transported to the feeding channel 30a, so that the solder can be quickly heated to a molten state by the heating part 40 during the process of moving to the welding end 301, and finally discharged from the welding end 301 to fill the welding seam 24a, completing the welding. In this solution, the weld 24a and the solder can be preheated at the same time to improve welding efficiency and quality. The structure is relatively simple, saving investment costs. The weld 24a is filled with solder for welding, and non-conductive polymer materials can be directly welded, which has good applicability.

[0047] It should be noted that, in one embodiment, the robot arm 20 includes at least two connecting arms, and the two connecting arms at both ends can at least move relative to each other in any direction, so that the mobile end 201 of the robot arm 20 can move relative to the trolley 10 in any direction. And the connecting arm at one end is installed on the trolley 10 through a rotating base. Specifically, the connecting arm is hingedly connected to the rotating base through an ear plate. It should be understood that the specific structure and working principle of the robot arm 20 are prior art and will not be elaborated here.

[0048] In one embodiment, the welding robot 100 further includes a solder bin 60 and a material extrusion portion 70 . The solder bin 60 is disposed on the robot arm 20 and connected to the welding end 302 . The material extrusion portion 70 is disposed on the welding gun 30 and is used to drive the solder to move from the welding end 302 toward the welding end 301 .

[0049] In this embodiment, the solder bin 60 is also arranged in the robot arm 20, so that the solder can continuously enter the material channel 30a of the welding gun 30, and the solder in the material channel 30a is driven to move toward the welding end 301 through the squeezing part 70, thereby improving the degree of automation.

[0050] It should be noted that the arrangement of the extruding portion 70 is not limited, as long as it can drive the solder to move from the welding end 302 to the welding end 301. In one embodiment, the extruding portion 70 is arranged in the form of an extruding electric push rod, and the solder is extruded by the push rod of the extruding electric push rod. In another embodiment, the extruding portion 70 is arranged in the form of a hydraulic push rod, and the solder is also extruded by the push rod of the hydraulic push rod.

[0051] In one embodiment, see Figures 8 to 10The extrusion part 70 includes a driving motor 701, a driving screw 702, an extrusion rod 703 and a transmission nut 704. The driving motor 701 is arranged on the robot arm 20. The driving screw 702 is connected to the output shaft of the driving motor 701 and extends along the arrangement direction of the welding end 302 and the welding end 301. One end of the extrusion rod 703 is penetrated through the feeding channel 30a and can move along its axial direction. The other end is located outside the feeding channel 30a. The transmission nut 704 is sleeved on the outside of the driving screw 702 and connected to the end of the extrusion rod 703 located outside the feeding channel 30a, which is used to convert the rotation of the driving screw 702 into the movement of the extrusion rod 703 along its axial direction.

[0052] In this embodiment, the output shaft of the driving motor 701 rotates, thereby driving the driving screw 702 to rotate synchronously, and through the cooperation between the driving screw 702 and the transmission nut 704, the rotation of the driving screw 702 is converted into linear movement of the extrusion rod 703, thereby realizing extrusion. At the same time, the driving motor 701 is kept away from heat sources, and the structure is stable and reliable.

[0053] In one embodiment, the welding robot 100 also includes an installation box 80, which is installed on the robotic arm 20 and has an installation cavity, and a connecting hole connecting the outside and the installation cavity is provided in the direction close to the welding end 302; the driving motor 701, the driving screw 702 and the transmission nut 704 are located in the installation cavity, and the extrusion rod 703 is located at one end outside the feeding channel 30a and extends into the installation cavity from the connecting hole.

[0054] In this embodiment, the driving motor 701, the driving screw 702 and the driving nut 704 are arranged in the installation cavity of the installation box 80 to protect the above components.

[0055] In one implementation, a limit groove is provided on the inner wall of the mounting cavity and one of the extrusion rod 703, and a limit block is provided on the other. The limit groove extends along the axial direction of the extrusion rod 703, and the limit block is clamped in the limit groove to limit the rotation of the extrusion rod 703 around its axial direction.

[0056] In this embodiment, the limiting groove and the limiting block cooperate to limit the extrusion rod 703 from being synchronously driven to rotate by the driving screw 702, ensuring that the transmission nut 704 can stably convert the rotation of the driving screw 702 into the linear movement of the extrusion rod 703, thereby improving stability.

[0057] In one embodiment, see Figure 8 and Fig. 9One end of the extrusion rod 703 located in the material feeding channel 30a is the extrusion end 7031, the welding end 302 is provided with a feed port 302a connected to the solder bin 60, and the connection between the hot air branch pipe 502 and the welding end 302 is located on the side of the feed port 302a close to the welding end 301; the extrusion part 70 also includes a reset spring 705, which connects the robot arm 20 and the transmission nut 704, and is used to drive the extrusion end 7031 to reset from a position close to the welding end 301 to a side of the feed port 302a away from the welding end 301.

[0058] In this embodiment, the welding end 302 is provided with an air inlet 302b, which is located at a side of the feed port 302a close to 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 material passage 30a, the drive motor 701 is stopped to drive the extrusion rod 703 to continue to move toward the welding end 301. The extrusion rod 703 can be quickly reset under the action of the reset spring 705, so that the extrusion end 7031 is located on the side of the feed port 302a away from the air inlet 302b, ensuring that the solder stably enters the material passage 30a and is preheated. It should be noted that in one embodiment, the torque of the reset 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 reset.

[0059] In one embodiment, the welding robot 100 also includes an electric push rod 90 and a coating head 901. The electric push rod 90 is arranged on the robot arm 20, and its telescopic rod 902 is telescopic 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.

[0060] In this embodiment, the robot arm 20 is also provided with an electric push rod 90 and a coating head 901. In this way, after the welding gun 30 fills the weld 24a with solder, the robot arm 20 can cooperate with the electric push rod 90 to drive the coating head 901 to evenly coat the solder at the weld 24a, thereby preventing the problem of poor welding quality caused by uneven solder.

[0061] In one embodiment, the coating head 901 and the hot air main pipe 501 are respectively disposed on two opposite sides of the welding gun 30 in the radial direction and are spaced apart from the welding gun 30 .

[0062] In this embodiment, the hot air pipe 501 and the coating head 901 are placed on both sides of the welding gun 30 in the radial direction, so that when the robot arm 20 drives the welding gun 30 to move toward the side where the hot air pipe 501 is provided, the hot air pipe 501 first preheats the weld 24a, and then the welding gun 30 outputs the solder, and finally the solder is smoothed by the coating head 901, so that the whole process is smoother, and the welding quality and efficiency are further improved.

[0063] In one embodiment, a slide groove is provided on one of the outer wall of the welding gun 30 and the telescopic rod 902, and a slider 903 is provided on the other. The slide groove is extended along the axial direction of the telescopic rod 902, and the slider 903 is provided in the slide groove.

[0064] In this embodiment, a slider 903 and a slide groove are provided between the welding gun 30 and the telescopic rod 902 of the electric push rod 90, so as to guide and support the telescopic rod 902 and ensure the stability of the solder coating head 901. It should be noted that the arrangement of the heating unit 40 is not limited, as long as it can heat the solder in the welding gun 30 to a molten state. In one embodiment, the heating unit 40 is arranged in the form of electromagnetic heating, and in another embodiment, the heating unit 40 is arranged in the form of fuel heating.

[0065] In one embodiment, the heating part 40 includes an insulation tube 401 and a plurality of electric heating rings 402. The insulation tube 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 are spaced apart along the arrangement direction of the welding end 302 and the welding end 301 and are located inside the insulation tube 401.

[0066] In this embodiment, the heating part 40 is configured in the form of a heat preservation tube 401 and multiple electric heating rings 402. The electric heating rings 402 are energized to generate heat to heat the solder in the welding gun 30, and the heat preservation tube 401 is used for insulation to accelerate the heating speed of the solder.

[0067] Combination Figures 6 to 13 The technical solution of the welding robot is described in detail: First, the weld 24a between the annularly spliced ​​hydrogen-blocking arc plates 21 is preheated through 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 through the hot air branch pipe 502 connected to the hot air blower 50, and then the drive motor 701 is started to drive the drive screw 702 to rotate, thereby driving the extrusion rod 703 to push the preheated solder forward; the solder is heated to a molten state by the electric heating ring 402 and then extruded to fill the weld 24a, and finally the electric push rod 90 is started to drive the coating head 901 to coat and level the solder at the weld 24a to prevent the problem of poor welding quality caused by uneven solder.

[0068] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A deep underground hydrogen storage structure, characterized in that: include: A concrete lining layer having a cavity; A hydrogen barrier layer is attached to the inner wall of the cavity; A connecting frame is arranged in the concrete lining layer and surrounds the periphery of the cavity; and A plurality of support arms are arranged at intervals on the circumferential side of the cavity, each of the support arms has a connecting end and a geotechnical end, and is provided with a casting flow channel connecting the connecting end and the geotechnical end, the connecting end is located in the concrete lining layer and connected to the connecting skeleton, the geotechnical end is located outside the concrete lining layer, and the casting flow channel has a grouting port located at the connecting end and a grouting port located at the geotechnical end.

2. The deep underground hydrogen storage structure according to claim 1, characterized in that: The support arm includes a hollow anchor rod and an anchor rod pad, the connection end and the rock end are formed at both ends of the hollow anchor rod, and the hollow channel of the hollow anchor rod constitutes the casting flow channel; Wherein, the connecting end is passed through a side of the connecting frame close to the cavity, and the anchor pad is located on a side of the connecting frame close to the cavity, and connects the connecting end and the connecting frame.

3. The deep underground hydrogen storage structure according to claim 1, characterized in that: There are multiple grouting openings, and the multiple grouting openings are arranged at intervals along the circumference and / or extension direction of the supporting arm.

4. The deep underground hydrogen storage structure according to claim 1, characterized in that: The deep underground hydrogen storage structure also includes a steel lining layer, which is arranged around the periphery of the cavity and is located between the concrete lining layer and the hydrogen barrier layer.

5. The deep underground hydrogen storage structure according to claim 1, characterized in that: The hydrogen barrier layer comprises a plurality of groups of hydrogen barrier arc plates, which are sequentially arranged along the axial direction of the cavity. Each group of hydrogen barrier arc plates is provided with a plurality of hydrogen barrier arc plates, and the plurality of hydrogen barrier arc plates in the same group are sequentially arranged along the circumferential direction of the cavity.

6. The deep underground hydrogen storage structure according to claim 5, characterized in that: Each of the hydrogen-blocking arc-shaped plates is provided with a tenon and a tenon groove at two ends of the cavity in the circumferential direction, respectively, and the tenon can be inserted into the adjacent tenon grooves of the same group.

7. The deep underground hydrogen storage structure according to claim 5 or 6, characterized in that: Both ends of each hydrogen-blocking arc plate in the circumferential direction of the cavity are welding ends, and the welding ends are inclined from a side away from the cavity to a side close to the cavity along a direction close to another welding end to form a welding side.

8. The deep underground hydrogen storage structure according to claim 7, characterized in that: Two adjacent welding side surfaces in the same group form a weld when they are spliced, and the angle of the weld is α, which satisfies 45°≤α≤60°.

9. The deep underground hydrogen storage structure according to claim 1, characterized in that: The connection frame is a steel cage disposed in the concrete lining layer; and / or, The containing cavity is cylindrical.

10. A construction method for a deep underground hydrogen storage structure, used for the deep underground hydrogen storage structure as claimed in any one of claims 1 to 9, characterized in that: The construction method of the deep underground hydrogen storage structure comprises the following steps: Excavate the earthwork required for the cavity according to the requirements of the drawings, and install a plurality of the support arms in a circular array along the axis of the cavity to the surrounding rock and soil layers, then tie and install the connection frame according to the design requirements, and connect the connection end to the connection frame, and then inject concrete slurry into the casting flow channel through the grouting port, so that the concrete slurry is grouted into the surrounding rock and soil layers through the grouting port; According to the design requirements, an annular support is arranged inside the cavity, and the annular support is used as an inner formwork for pouring concrete 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 polished and cleaned, and then the hydrogen barrier layer is glued to the inner wall of the cavity.

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