Compressed air energy storage underground air storage device and construction method thereof

Abstract

The invention provides a compressed air energy storage underground air storage device and a construction method thereof, and relates to the technical field of underground air storage, the compressed air energy storage underground air storage device comprises two air storage layers, the two air storage layers are buried underground in a U shape, the two air storage layers are in butt joint to form a square, a transverse channel is arranged between the two butt joint ends of the two air storage layers, and the transverse channel is communicated with the air storage layers. Compared with the prior art, the U-shaped gas storage layer is separated by the overhaul layer, the first gas inlet pipe and the first gas outlet pipe in each section are communicated with the second gas inlet pipe and the second gas outlet pipe, and under the action of the driving assembly, the gas storage layer is driven by the driving assembly to rotate, so that the gas storage layer can be maintained, and the service life of the gas storage layer is prolonged. The gas charging stage and the gas discharging stage can be independently carried out in each section of gas storage layer, pressure values in other gas chambers cannot be affected, alternate opening and closing can be carried out, gas is charged or discharged according to needs, and the stability of the gas storage layer is kept.

Description

Technical Field

[0001] The present invention relates to the technical field of underground gas storage, and in particular to a compressed air energy storage underground gas storage device and a construction method thereof. Background Art

[0002] Compressed air energy storage power stations are mainly used to cooperate with wind power generation, tidal power generation and hydropower generation. They convert excess electricity in the power grid during periods of low power load into the potential energy of compressed air and store it in the air storage device. During peak power consumption periods, the compressed air is released to generate electricity, effectively alleviating the intermittent and random fluctuations of renewable energy power generation and improving the absorption level of renewable energy power generation. Compressed air energy storage is an electric energy storage technology that can achieve large-capacity and long-term energy storage.

[0003] The gas storage device needs to be buried underground, and then connected to the compressor and expander on the ground through the air inlet and outlet pipes to realize the conversion of electrical energy and gas energy. In this process, when directly filling the gas storage device with gas, through the design of multiple air inlet and outlet heads, the underground gas storage device can make the gas released from the air inlet and outlet pipes fill the gas storage cavity more evenly, avoiding uneven distribution of gas in the gas storage cavity, thereby causing the problem of inconsistent temperature in various places in the gas storage cavity. However, during the deflation process, the pressure inside the gas storage device will also change, thereby affecting the stability inside the gas storage device. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a compressed air energy storage underground gas storage device and its construction method to solve the problems raised in the above background technology. The present invention has a novel structure. The gas storage layer is divided by a U-shaped inspection layer, and the first air inlet pipe and the first air outlet pipe inside each section are connected to the second air inlet pipe and the second air outlet pipe. Under the action of the driving component, the inflation stage and the deflation stage can be carried out separately inside each section of the gas storage layer without affecting the pressure values ​​inside other air chambers. It can be opened and closed alternately, and gas can be filled or released as needed to maintain the stability of the gas storage layer.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a compressed air energy storage underground gas storage device, including a gas storage layer, wherein the gas storage layer is provided with two groups, the two groups of gas storage layers are U-shaped and buried underground, the two groups of gas storage layers are butted together to form a square, a transverse channel is provided between the two butted ends of the two groups of gas storage layers, the two ends of the transverse channel connected to the gas storage layer are fixed with a connecting layer, and a vertical channel is fixed at the middle top of the transverse channel, a second air inlet pipe and a second air outlet pipe are fixed inside the vertical channel, a first air inlet pipe and a first air outlet pipe are installed inside the gas storage layer, and the first air inlet pipe and the first air outlet pipe are distributed up and down, and the second air inlet pipe is provided between the two butted ends of the gas storage layer. The air pipe and the second air outlet pipe penetrate into the interior of the transverse channel and extend to both sides, and the second air inlet pipe and the second air outlet pipe are respectively connected to the first air inlet pipe and the first air outlet pipe passing through the two ends of the air storage layer. An inspection layer is fixed at the two right-angle ends of the air storage layer, and a driving assembly is provided inside the inspection layer. The driving assembly includes a second winding seat, and a winding shaft is rotatably installed inside the second winding seat, and a traction rope is wound on the winding shaft. The air storage layer is divided into three sections of equal length by the two inspection layers, and piston plates are slidably installed inside the three sections of the air storage layer. The second winding seat is arranged inside the air storage layer according to the direction of air intake, and the traction rope is fixedly connected to the piston plate in the air intake direction.

[0006] Furthermore, a vertical shaft is fixed on the top of the maintenance layer, and the vertical shaft is connected to the interior of the maintenance layer. Connecting elbows are fixed at the positions of the first air inlet pipe and the first air outlet pipe corresponding to the gas storage layers on both sides inside the maintenance layer, and the connecting elbows connect the first air inlet pipe and the first air outlet pipe at both ends of the gas storage layers.

[0007] Furthermore, a valve plate is rotatably mounted inside the connecting elbow, and a valve stem is fixed on the top of the valve plate. The valve stem passes through the connecting elbow, and the two groups of valve stems passing through the connecting elbows are fixedly connected.

[0008] Furthermore, the drive assembly also includes a gear, a gear is fixed on the top of the valve stem, and a tooth plate is meshed and connected on one side of the gear, a first plug rod is fixed on the back of the tooth plate, the first plug rod slides into the interior of one side of the gas storage layer, a first spring is sleeved on the outer surface of the first plug rod, and the two ends of the first spring are respectively fixedly connected to the tooth plate and the inner wall of the maintenance layer.

[0009] Furthermore, an inclined plate is fixed to the outer side of the tooth plate, and an inclined block is slidably connected to the surface of the inclined plate. A second plug rod is fixed to the back side of the inclined block, and the second plug rod slides into the gas storage layer on the other side of the maintenance layer. A second spring is sleeved on the outer surface of the second plug rod, and the two ends of the second spring are fixedly connected to the gas storage layer and the inclined block respectively.

[0010] Furthermore, there are three groups of the second winding seats, and the three groups of the second winding seats are fixed at the front end of each gas storage layer in a clockwise direction, and the traction rope of the second winding seat is fixedly connected to the piston plate of the next group. A motor is fixed on the top of the second winding seat, and the output end of the motor is fixedly connected to the winding shaft.

[0011] Furthermore, two top columns are fixed to the front end of each section of the gas storage layer, and a retaining ring is fixed to the rear end of each section of the gas storage layer, and the piston plate is alternately in compression contact with the top columns and the retaining rings.

[0012] Furthermore, air holes are equidistantly provided on the top of the first air inlet pipe and the bottom of the first air outlet pipe, and electromagnetic valve connectors are installed at the connections between the first air inlet pipe and the second air inlet pipe and between the first air outlet pipe and the second air outlet pipe.

[0013] Furthermore, a first winding seat is fixed on the inner wall of the retaining ring, and a cover cloth is wound inside the first winding seat through a torsion spring. Magnetic strips are installed on both sides of the cover cloth, and the cover cloth is adsorbed on the outer surface of the first air inlet pipe through the magnetic strips.

[0014] A method for constructing an underground compressed air energy storage device comprises the following steps: (1) First, excavate the gas storage layer and bury it into the required space. Connect and install the gas storage layer's horizontal channel and the maintenance layer. Arrange a vertical channel passing through the ground at the upper end of the horizontal channel, and arrange a vertical shaft passing through the ground at the upper end of the maintenance layer. (2) The second air inlet pipe and the second air outlet pipe are arranged inside the transverse channel and the vertical channel, and the first air inlet pipe and the first air outlet pipe are installed inside the gas reservoir to connect with the second air inlet pipe and the second air outlet pipe; (3) The first air inlet pipe and the first air outlet pipe at the inner end of the gas storage layer are connected and installed with the connecting elbow inside the maintenance layer. A piston plate sliding along the first air inlet pipe and the first air outlet pipe is set inside each air chamber of the gas storage layer and penetrates into the maintenance layer through a traction rope connection; (4) By driving the assembly to alternately open the first air inlet pipe or the first air outlet pipe during the gas storage layer inflation and deflation stages, the gas can be independently injected or released into each gas storage layer chamber, thereby maintaining the stability of the remaining gas chambers.

[0015] Beneficial effects of the present invention: During the gas release stage of the present invention, the piston plate is pulled by the traction rope to move toward one side of the top column, compressing the remaining gas inside the gas storage layer. During this process, the cover cloth will be gradually unwound and covered on the upper end of the first air inlet pipe. The air holes of the first air inlet pipe are sealed by magnetic strip adsorption until the piston plate contacts the top column. When the gas is subsequently filled in, the gas first fills into the back side of the piston plate through the air holes facing the bottom of the top column, and pushes the piston plate to move under pressure. As the piston plate moves, the magnet is squeezed and separated from the first air inlet pipe, and the first winding seat rolls up the cover cloth, and the air holes are gradually opened one by one, so that high-pressure air can evenly fill the interior of the air chamber of the entire air storage layer through the air holes on the first air inlet pipe.

[0016] The present invention extracts the gas inside the air chamber of the closest gas storage layer through the air hole through one end connected to the first air outlet pipe and the second air outlet pipe. During the gas release process, the motor inside the transverse channel first drives the second winding seat to rotate, reels the traction rope, and pulls the piston plate to move along the inside of the air chamber of the gas storage layer until it moves to the position of the top column. Because the inside of the air chamber is filled with high-pressure gas to squeeze the piston plate at the beginning, the piston plate cannot move. After the gas is released, the piston plate can move and gradually compress the gas inside the air chamber until it is finally sent out.

[0017] The cam is pressed against the valve stem and the cam is pressed against the valve body, and the cam is pressed against the valve body to release the air from the cam, thereby releasing the air from the cam and the cam.

[0018] The cam is engaged with the first and second control rods and the control rods, and the cam is engaged with the gear and the control rods, thereby completing the transformation of the valve plate inside the connecting bend, connecting the adjacent first air inlet pipes and closing the adjacent first air outlet pipes, and filling all the air chambers in turn. In this structure, the air inlet and the air outlet are connected and cut off by the rotation of the valve plate driven by the driving component, so that the air can be injected or released into or out of the air chamber one by one to avoid instability inside the air chamber caused by changes in gas pressure.

[0019] The first air inlet pipe and the second air inlet pipe of the present invention are connected by a connecting elbow, which has the same shape as the gas storage layer. The air inlet pipe and the air outlet pipe can be connected or isolated by the valve plate inside the connecting elbow. Each section of the gas storage layer can be deflated and inflated one by one without interfering with each other.

[0020] Compared with the prior art, the present invention divides the gas storage layer into sections by a U-shaped maintenance layer, and connects the first air inlet pipe and the first air outlet pipe in each section with the second air inlet pipe and the second air outlet pipe. Under the action of the driving component, the inflation stage and the deflation stage can be carried out separately inside each section of the gas storage layer without affecting the pressure values ​​inside other air chambers. The gas can be opened and closed alternately, and gas can be filled or released as needed to maintain the stability of the gas storage layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic flow chart of a construction method of a compressed air energy storage underground gas storage device according to the present invention; Figure 2 This is a schematic diagram of the overall structure of a compressed air energy storage underground gas storage device of the present invention; Figure 3 This is a schematic diagram of the internal structure of the transverse channel and vertical channel of a compressed air energy storage underground gas storage device of the present invention; Figure 4 This is a schematic diagram of the internal structure of the gas storage layer of a compressed air energy storage underground gas storage device of the present invention; Figure 5 This is a schematic diagram of the internal structure of the maintenance layer of a compressed air energy storage underground gas storage device of the present invention; Figure 6 This is a schematic diagram of the structure of a drive assembly of a compressed air energy storage underground gas storage device according to the present invention; Figure 7 This is a schematic diagram of the internal structure of a retaining ring of a compressed air energy storage underground gas storage device of the present invention; Figure 8 This is a schematic diagram comparing the shapes of the first air inlet pipe, the second air inlet pipe and the air storage layer of a compressed air energy storage underground air storage device of the present invention.

[0022] In the figure: 1. Gas storage layer; 11. First air inlet pipe; 12. First air outlet pipe; 13. Air hole; 14. Piston plate; 15. Top column; 16. Block ring; 17. First winding seat; 18. Cover cloth; 2. Horizontal channel; 21. Vertical channel; 22. Connecting layer; 23. Second air outlet pipe; 24. Second air inlet pipe; 25. Solenoid valve connector; 3. Inspection layer; 31. Vertical shaft; 32. Connecting elbow; 33. Valve stem; 4. Drive assembly; 41. Second winding seat; 42. Motor; 43. Winding shaft; 44. Traction rope; 45. Gear; 46. Tooth plate; 47. First plug rod; 48. First spring; 49. Inclined plate; 410. Inclined block; 411. Second plug rod; 412. Second spring. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] See also Figures 1 to 8 , the present invention provides a technical solution: A method for constructing an underground compressed air energy storage device comprises the following steps: (1) First, excavate the gas storage layer and bury it into the required space. Connect and install the gas storage layer's horizontal channel and the maintenance layer. Arrange a vertical channel passing through the ground at the upper end of the horizontal channel, and arrange a vertical shaft passing through the ground at the upper end of the maintenance layer. (2) The second air inlet pipe and the second air outlet pipe are arranged inside the transverse channel and the vertical channel, and the first air inlet pipe and the first air outlet pipe are installed inside the gas reservoir to connect with the second air inlet pipe and the second air outlet pipe; (3) The first air inlet pipe and the first air outlet pipe at the inner end of the gas storage layer are connected and installed with the connecting elbow inside the maintenance layer. A piston plate sliding along the first air inlet pipe and the first air outlet pipe is set inside each air chamber of the gas storage layer and penetrates into the maintenance layer through a traction rope connection; (4) By driving the assembly to alternately open the first air inlet pipe or the first air outlet pipe during the gas storage layer inflation and deflation stages, the gas can be independently injected or released into each gas storage layer chamber, thereby maintaining the stability of the remaining gas chambers.

[0025] A compressed air energy storage underground gas storage device includes a gas storage layer 1, wherein the gas storage layer 1 is provided with two groups, the two groups of gas storage layers 1 are U-shaped and buried underground, the two groups of gas storage layers 1 are butted together to form a square, a transverse channel 2 is provided between the two ends of the butted gas storage layers 1, the two ends of the transverse channel 2 connected to the gas storage layer 1 are fixed with a connecting layer 22, and a vertical channel 21 is fixed at the top of the middle of the transverse channel 2, and a second air inlet pipe 24 and a second air outlet pipe 23 are fixed inside the vertical channel 21 The first air inlet pipe 11 and the first air outlet pipe 12 are installed inside the gas storage layer 1, and the first air inlet pipe 11 and the first air outlet pipe 12 are distributed up and down, the second air inlet pipe 24 and the second air outlet pipe 23 penetrate into the interior of the transverse channel 2 and extend to both sides, and the second air inlet pipe 24 and the second air outlet pipe 23 are respectively connected to the first air inlet pipe 11 and the first air outlet pipe 12 passing through the two ends of the gas storage layer 1, and the two right-angle ends of the gas storage layer 1 are fixed with an inspection layer 3, and the interior of the inspection layer 3 is provided with a drive group The second air intake pipe 24 and the second air outlet pipe 23 are connected to each other through the air intake and the air outlet pipe 23. The air intake pipe 24 and the second air outlet pipe 23 are connected to each other through the air intake and the air outlet pipe 23. When the air intake and the air outlet pipe 24 are in the air intake and the air outlet pipe 23 are connected, the air intake and the ...

[0026] In this embodiment, a vertical shaft 31 is fixed on the top of the maintenance layer 3, and the vertical shaft 31 is connected to the inside of the maintenance layer 3. A connecting elbow 32 is fixed at the position of the first air inlet pipe 11 and the first air outlet pipe 12 of the gas storage layer 1 on both sides of the maintenance layer 3, and the connecting elbow 32 connects the first air inlet pipe 11 and the first air outlet pipe 12 at both ends of the gas storage layer 1. A valve plate is rotatably installed inside the connecting elbow 32, and a valve stem 33 is fixed on the top of the valve plate. The valve stem 33 passes through the connecting elbow 32, and the valve stem 33 of the two groups of connecting elbows 32 passes through. Fixedly connected, air holes 13 are equidistantly provided at the top of the first air inlet pipe 11 and the bottom of the first air outlet pipe 12, and electromagnetic valve connectors 25 are installed at the connection between the first air inlet pipe 11 and the second air inlet pipe 24 and the first air outlet pipe 12 and the second air outlet pipe 23. The first air inlet pipe 11 and the second air inlet pipe 24 are connected by a connecting elbow 32, which has the same shape as the gas storage layer 1. The air inlet pipe and the air outlet pipe can be connected or disconnected by the valve plate inside the connecting elbow 32, and each section of the gas storage layer 1 can be deflated and inflated one by one without interfering with each other.

[0027] In this embodiment, the drive assembly 4 also includes a gear 45, a gear 45 is fixed to the top of the valve stem 33, and a toothed plate 46 is meshed and connected on one side of the gear 45, a first plug rod 47 is fixed on the back of the toothed plate 46, the first plug rod 47 slides into the interior of the gas storage layer 1 on one side, a first spring 48 is sleeved on the outer surface of the first plug rod 47, and the two ends of the first spring 48 are respectively fixed to the toothed plate 46 and the inner wall of the maintenance layer 3, an inclined plate 49 is fixed on the outer side of the toothed plate 46, and an inclined block 410 is slidably connected on the surface of the inclined plate 49, a second plug rod 411 is fixed on the back of the inclined block 410, and the second plug rod 411 slides into the interior of the gas storage layer 1 on the other side of the maintenance layer 3, and the outer surface of the second plug rod 411 is sleeved A second spring 412, and both ends of the second spring 412 are fixedly connected to the gas storage layer 1 and the inclined block 410 respectively. There are three groups of second winding seats 41. The three groups of second winding seats 41 are fixed at the front end of each section of the gas storage layer 1 in a clockwise direction, and the traction rope 44 of the second winding seat 41 is fixedly connected to the piston plate 14 of the next group. A motor 42 is fixed on the top of the second winding seat 41, and the output end of the motor 42 is fixedly connected to the winding shaft 43. Two top columns 15 are fixed at the front end of each section of the gas storage layer 1, and a retaining ring 16 is fixed at the rear end of each section of the gas storage layer 1. The piston plate 14 is alternately squeezed and contacted with the top column 15 and the retaining ring 16. The position of the piston plate 14 is divided into an air intake stage and an air outlet stage. The three groups of second winding seats 41 are arranged at two The inside of the inspection layer 3 and the end of the transverse channel 2 are connected close to the air inlet pipe. The piston plate 14 shown in the figure of this article is located close to the side of the retaining ring 16, that is, the inflation stage has been completed, and each air chamber of the air storage layer 1 is filled with high-pressure gas. When the gas needs to be released later, the gas inside the air chamber of the air storage layer 1 closest to the air storage layer 1 is first extracted through the air hole 13 through the end connected by the first air outlet pipe 12 and the second air outlet pipe 23. In the process of gas release, the second winding seat 41 is first driven to rotate by the motor 42 inside the transverse channel 2, and the traction rope 44 is wound up, pulling the piston plate 14 to move along the inside of the air chamber of the air storage layer 1 until it moves to the position of the top column 15. Because the air chamber is initially filled with high-pressure gas to squeeze the piston plate 14, the piston plate 14 cannot After the gas is released, the piston plate 14 can move and gradually compress the gas inside the air chamber until it is finally sent out. After the second plug 411 is no longer squeezed by the piston plate 14, it penetrates into the gas storage layer 1 through the second spring 412. As the inclined block 410 moves, the first plug 47 is subjected to the elastic force of the first spring 48, driving the tooth plate 46 to move and engage with the gear 45, thereby driving the rotation of the valve stem 33. The initial states of the valve plates inside the two connecting elbows 32 are one open and one closed, so the states of the air inlet pipe and the air outlet pipe are always opposite. At this time, as the outlet pipe valve plate inside the connecting elbow 32 of the outlet pipe opens, it is connected to the air chamber of the next section of the gas storage layer 1, and the air in the next air chamber continues to be released through the outlet pipe and the air hole 13.The second winding seat 41 also drives the piston plate 14 to move, and the air in the three groups of air chambers is released in sequence. According to the need to release the air, if the air in one air chamber meets the need, the other two air chambers do not need to be opened, which can avoid changes in the internal gas pressure. After all the gas is released, the piston plate 14 will move to the position of the top column 15, and then the gas will be fed in from the other end through the second air inlet pipe 24. In this state, because the gas is completely released, all the first air outlet pipes 12 are connected, and all the first air inlet pipes 11 are isolated. The gas is injected through the air hole 13 at the bottom of the top column 15, filling the back of the piston plate 14, and the piston plate 14 is moved by pressure. In this state, the second winding seat 41 is pressed against the piston plate 1 4 is unwound synchronously until the piston plate 14 returns to the position of the retaining ring 16, indicating that the interior of the air chamber has been filled. As the piston plate 14 moves and cooperates with the first plug rod 47 and the second plug rod 411, the inclined block 410 slides along the inclined surface of the inclined plate 49, driving the tooth plate 46 to move in the opposite direction, meshing with the gear 45 to drive the valve stem 33 to rotate in the opposite direction, completing the transformation of the valve plate inside the connecting elbow 32 again, connecting the adjacent first air inlet pipe 11 and closing the adjacent first air outlet pipe 12, filling all the air chambers in sequence. In this structure, air inlet and outlet are both connected and isolated by the rotation of the valve plate driven by the drive assembly 4, so that air can be injected or released into or out of the air chamber one by one, avoiding instability inside the air chamber caused by changes in gas pressure.

[0028] In this embodiment, a first winding seat 17 is fixed on the inner wall of the retaining ring 16, and a cover cloth 18 is wound inside the first winding seat 17 through a torsion spring. Magnetic strips are installed on both sides of the cover cloth 18, and the cover cloth 18 is adsorbed on the outer surface of the first air inlet pipe 11 through the magnetic strips. The position of the piston plate 14 shown in the figure is a state in which the gas storage layer 1 is filled with gas, so the piston plate 14 is squeezed and pushed to the side of the retaining ring 16 by the gas pressure. At this time, the cover cloth 18 is wound by the first winding seat 17. In the subsequent gas release stage, the piston plate 14 is pulled by the traction rope 44 toward one side of the top column 15 to compress the remaining gas inside the gas storage layer 1. In this process The cover cloth 18 will be gradually unwound and covered on the upper end of the first air inlet pipe 11, and the air holes 13 of the first air inlet pipe 11 will be sealed through the adsorption of the magnetic strip until the piston plate 14 contacts the top column 15. When the gas is subsequently filled, the gas first fills into the back of the piston plate 14 through the air holes 13 at the bottom of the top column 15, and pushes the piston plate 14 to move under pressure. As the piston plate 14 moves, the magnet is squeezed and separated from the first air inlet pipe 11, and the first winding seat 17 rolls up the cover cloth 18, and the air holes 13 are gradually opened one by one, so that high-pressure air can evenly fill the interior of the air chamber of the entire air storage layer 1 through the air holes 13 on the first air inlet pipe 11.

[0029] When using the device, two groups of U-shaped gas storage layers 1 are assembled and buried in the pre-excavated underground, and a horizontal channel 2 and a vertical channel 21 are arranged in the middle for burying the second air inlet pipe 24 and the second air outlet pipe 23, and the first air inlet pipe 11 and the first air outlet pipe 12 are installed inside the gas storage layer 1 and connected to the second air inlet pipe 24 and the second air outlet pipe 23. When in use, after the gas is released, the piston plate 14 can move and gradually compress the gas inside the air chamber until it is finally sent out. After the second plug rod 411 is no longer squeezed by the piston plate 14, it penetrates into the gas storage layer 1 through the second spring 412. As the inclined block 410 moves, the first plug rod 47 is subjected to the elastic force of the first spring 48, driving the tooth plate 46 to move and engage with the gear 45, thereby driving the valve stem 33 to rotate. The initial states of the valve plates inside the two connecting elbows 32 are one open and one closed, so the states of the air inlet pipe and the air outlet pipe are always opposite. At this time, as the outlet pipe valve plate inside the connecting elbow 32 of the outlet pipe opens, it is connected with the air chamber of the air storage layer 1 of the next section, and the air in the next air chamber continues to be released through the outlet pipe and the air hole 13, and the second winding seat 41 also drives the piston plate 14 to move, and the air inside the three groups of air chambers is released in sequence. According to the demand for releasing air, if the air inside one air chamber meets the demand, the other two air chambers do not need to be opened, which can avoid changes in the internal gas pressure. After all the gas is released, the piston plate 14 will move to the position of the top column 15, and then pass from the other end. The second air inlet pipe 24 supplies gas. In this state, because the gas is completely released, all the first air outlet pipes 12 are connected, and all the first air inlet pipes 11 are isolated. The gas is injected through the air hole 13 at the bottom of the top column 15 and fills the back of the piston plate 14. The piston plate 14 moves by pressure squeezing. In this state, the second winding seat 41 synchronously unwinds the piston plate 14 until the piston plate 14 returns to the position of the retaining ring 16, indicating that the interior of the air chamber has been filled. As the piston plate 14 moves and cooperates with the first plug rod 47 and the second plug rod 411, the inclined block 410 slides along the inclined surface of the inclined plate 49, driving the gear plate 46 to move in the opposite direction, meshing with the gear 45 to drive the valve stem 33 to rotate in the opposite direction, and completing the rotation of the valve plate inside the connecting elbow 32 again. The air inlet and outlet pipes 11 are connected to each other, and the air inlet and outlet pipes 12 are closed. All the air chambers are filled in turn. In this structure, the air inlet and outlet are connected and isolated by the rotation of the valve plate driven by the driving component 4, so that the air can be injected or released into or out of the air chamber one by one to avoid instability inside the air chamber caused by changes in gas pressure. In the gas release stage, the piston plate 14 is pulled by the traction rope 44 toward one side of the top column 15 to compress the remaining gas in the gas storage layer 1. In this process, the cover cloth 18 will be gradually unwound and covered on the upper end of the first air inlet pipe 11. The air hole 13 of the first air inlet pipe 11 is sealed by the magnetic strip until the piston plate 14 contacts the top column 15. When the gas is subsequently filled in,Gas first enters the back of the piston plate 14 through the air holes 13 at the bottom of the top column 15, and pushes the piston plate 14 to move under pressure. As the piston plate 14 moves, the magnet is squeezed and separated from the first air inlet pipe 11. The first reel-up seat 17 reels the cover cloth 18, and the air holes 13 are gradually opened one by one. As a result, the high-pressure air can evenly fill the entire air chamber of the air storage layer 1 through the air holes 13 on the first air inlet pipe 11.

[0030] The basic principles, main features and advantages of the present invention are shown and described above. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A compressed air energy storage underground gas storage device, comprising a gas storage layer (1), characterized in that: The gas storage layer (1) is provided with two groups, and the two groups of gas storage layers (1) are U-shaped and buried underground. The two groups of gas storage layers (1) are butted together to form a square. A transverse channel (2) is provided between the two butted ends of the two groups of gas storage layers (1). The two ends of the transverse channel (2) connected to the gas storage layer (1) are fixed with connecting layers (22), and a vertical channel (21) is fixed at the top of the middle of the transverse channel (2). A second air inlet pipe (24) and a second air outlet pipe (23) are fixed inside the vertical channel (21). A first air inlet pipe (11) and a first air outlet pipe (12) are installed inside the gas storage layer (1), and the first air inlet pipe (11) and the first air outlet pipe (12) are distributed up and down. The second air inlet pipe (24) and the second air outlet pipe (23) penetrate into the interior of the transverse channel (2) and extend to both sides. (24) and the second air outlet pipe (23) are respectively connected to the first air inlet pipe (11) and the first air outlet pipe (12) passing through the two ends of the air storage layer (1), and the two right-angle ends of the air storage layer (1) are fixed with an inspection layer (3), and the interior of the inspection layer (3) is provided with a driving component (4), and the driving component (4) includes a second winding seat (41), and the interior of the second winding seat (41) is rotatably installed with a winding shaft (43), and a traction rope (44) is wound on the winding shaft (43), and the air storage layer (1) is divided into three sections of equal length by the two inspection layers (3), and the interiors of the three sections of the air storage layer (1) are all slidably installed with a piston plate (14), and the second winding seat (41) is arranged inside the air storage layer (1) according to the direction of air intake, and the traction rope (44) is fixedly connected to the piston plate (14) in the air intake direction.

2. A compressed air energy storage underground gas storage device according to claim 1, characterized in that: A vertical shaft (31) is fixed on the top of the maintenance layer (3), and the vertical shaft (31) is communicated with the interior of the maintenance layer (3). A connecting elbow (32) is fixed at positions corresponding to the first air inlet pipe (11) and the first air outlet pipe (12) of the gas storage layers (1) on both sides of the maintenance layer (3), and the connecting elbow (32) connects the first air inlet pipe (11) and the first air outlet pipe (12) at both ends of the gas storage layer (1).

3. The compressed air energy storage underground gas storage device according to claim 2, characterized in that: A valve plate is rotatably mounted inside the connecting bend (32), and a valve stem (33) is fixed on the top of the valve plate. The valve stem (33) passes through the connecting bend (32), and the two groups of valve stems (33) passing through the connecting bend (32) are fixedly connected.

4. The compressed air energy storage underground gas storage device according to claim 3, characterized in that: The driving assembly (4) further comprises a gear (45), the top of the valve stem (33) is fixed with the gear (45), and one side of the gear (45) is meshedly connected with a tooth plate (46), the back of the tooth plate (46) is fixed with a first plug rod (47), the first plug rod (47) slides into the interior of one side of the gas storage layer (1), a first spring (48) is sleeved on the outer surface of the first plug rod (47), and the two ends of the first spring (48) are respectively fixedly connected to the tooth plate (46) and the inner wall of the maintenance layer (3).

5. The compressed air energy storage underground gas storage device according to claim 4, characterized in that: An inclined plate (49) is fixed on the outer side of the tooth plate (46), and an inclined block (410) is slidably connected to the surface of the inclined plate (49). A second insertion rod (411) is fixed to the back side of the inclined block (410), and the second insertion rod (411) slides into the interior of the gas storage layer (1) on the other side of the maintenance layer (3). A second spring (412) is sleeved on the outer surface of the second insertion rod (411), and two ends of the second spring (412) are fixedly connected to the gas storage layer (1) and the inclined block (410), respectively.

6. A compressed air energy storage underground gas storage device and a construction method thereof according to claim 5, characterized in that: There are three groups of the second winding seats (41), and the three groups of the second winding seats (41) are fixed at the front end of each gas storage layer (1) in a clockwise direction, and the traction rope (44) of the second winding seat (41) is fixedly connected to the piston plate (14) of the next group. A motor (42) is fixed on the top of the second winding seat (41), and the output end of the motor (42) is fixedly connected to the winding shaft (43).

7. The compressed air energy storage underground gas storage device according to claim 1, characterized in that: Two top columns (15) are fixed to the front end of each section of the gas storage layer (1), and a retaining ring (16) is fixed to the rear end of each section of the gas storage layer (1), and the piston plate (14) is alternately in compression contact with the top columns (15) and the retaining ring (16).

8. The compressed air energy storage underground gas storage device according to claim 7, characterized in that: Air holes (13) are provided at equal intervals on the top of the first air inlet pipe (11) and the bottom of the first air outlet pipe (12), and electromagnetic valve connectors (25) are installed at the connections between the first air inlet pipe (11) and the second air inlet pipe (24) and between the first air outlet pipe (12) and the second air outlet pipe (23).

9. The underground compressed air energy storage device according to claim 8, characterized in that: A first winding seat (17) is fixed on the inner wall of the retaining ring (16), and a cover cloth (18) is wound inside the first winding seat (17) through a torsion spring. Magnetic strips are installed on both sides of the cover cloth (18), and the cover cloth (18) is adsorbed on the outer surface of the first air inlet pipe (11) through the magnetic strips.

10. A construction method for a compressed air energy storage underground gas storage device implemented by the device according to claim 1, characterized in that: The construction method comprises the following steps: (1) First, excavate the gas storage layer and bury it into the required space. Connect and install the gas storage layer's horizontal channel and the maintenance layer. Arrange a vertical channel passing through the ground at the upper end of the horizontal channel, and arrange a vertical shaft passing through the ground at the upper end of the maintenance layer. (2) The second air inlet pipe and the second air outlet pipe are arranged inside the transverse channel and the vertical channel, and the first air inlet pipe and the first air outlet pipe are installed inside the gas reservoir to connect with the second air inlet pipe and the second air outlet pipe; (3) The first air inlet pipe and the first air outlet pipe at the inner end of the gas storage layer are connected and installed with the connecting elbow inside the maintenance layer. A piston plate sliding along the first air inlet pipe and the first air outlet pipe is set inside each air chamber of the gas storage layer and penetrates into the maintenance layer through a traction rope connection; (4) By driving the assembly to alternately open the first air inlet pipe or the first air outlet pipe during the gas storage layer inflation and deflation stages, the gas can be independently injected or released into each gas storage layer chamber, thereby maintaining the stability of the remaining gas chambers.

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