Underground gas storage chamber with plug and compressed air energy storage system

Abstract

The application discloses a kind of underground gas storage chamber with plug and compressed air energy storage system, it is related to the underground gas storage technology field of compressed air energy storage.The underground gas storage chamber with plug includes plug and at least one group of gas storage chamber;Plug includes first fixed end, second fixed end and inlet and outlet gas pipeline;Inlet and outlet gas pipeline includes first turnout, second turnout and third turnout which are communicated with each other;First turnout and the above-mentioned second turnout are symmetrically arranged, and the third turnout is arranged between the above-mentioned first turnout and the above-mentioned second turnout, and the included angle between the above-mentioned third turnout and the above-mentioned first turnout is equal to the included angle between the above-mentioned third turnout and the above-mentioned second turnout.The underground gas storage chamber with plug provided by the application solves the technical problems that the stress condition of the underground gas storage structure of compressed air energy storage system in the prior art is not good, frequent maintenance and replacement are needed, and safety is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of underground gas storage for compressed air energy storage, and in particular to an underground gas storage chamber with a blind head and a compressed air energy storage system. Background Art

[0002] Compressed air energy storage (CAES) is a type of electrical energy storage technology. During periods of low electricity demand, a compressor converts electrical energy into air energy and stores it in the form of high-pressure air in a storage system. During peak electricity demand, the high-pressure air is released from the storage system and passed through an expander to generate electricity, converting the air energy into electricity.

[0003] Compressed air energy storage systems store this high-pressure air through a gas storage system. The storage pressure is typically around 10 MPa, which falls into the medium-to-high pressure range. Existing gas storage systems are divided into above-ground and underground systems. Underground systems are particularly suitable for areas with underground excavation, such as those in underground rock formations.

[0004] In the process of implementing the present invention, the inventors discovered that the prior art has at least the following problems:

[0005] Existing gas storage systems often use a gas storage chamber, which is cylindrical and arranged horizontally underground. The gas storage chamber stores medium- and high-pressure gases. During the intake process, since the gas in the intake pipe is medium- and high-pressure gas, and the gas in the gas storage chamber is relatively low-pressure, when the medium-pressure gas enters the gas storage chamber from the intake pipe, the gas expansion pressure will drop, and the intake pipe will vibrate at this time. The exhaust process is similar. The frequent vibration of the inlet and outlet pipes will cause the connection between the gas storage chamber and the gas storage chamber to be a weak link in the stress, requiring frequent inspection, maintenance, and replacement. All of these will cause the entire equipment to be suspended, affecting the operating efficiency and service life of the entire compressed air energy storage equipment.

[0006] Based on this, how to improve the stress conditions of underground gas storage systems and enhance the safety of underground gas storage systems is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0007] The purpose of the present invention is to provide an underground gas storage cavern with good mechanical properties and high safety.

[0008] To achieve this purpose, on the one hand, an underground gas storage cavern with a blind head is provided, comprising a blind head and at least one group of gas storage chambers; the blind head comprises a first fixed end, a second fixed end and an air inlet and outlet pipe; the first fixed end and the second fixed end are both used to fixedly connect the gas storage chambers; the air inlet and outlet pipes comprise a first branch, a second branch and a third branch that are interconnected; the first branch is arranged at the first fixed end, the second branch is arranged at the second fixed end, and the first branch and the second branch are both used for filling and discharging the gas storage chambers; the first branch and the second branch are symmetrically arranged, the third branch is cross-arranged between the first branch and the second branch, and the angle between the third branch and the first branch is equal to the angle between the third branch and the second branch.

[0009] Furthermore, there is a group of the above-mentioned gas storage chambers, and the above-mentioned gas storage chambers are arc-shaped. The left end of the above-mentioned gas storage chambers is fixed to the above-mentioned first fixed end, and the right end of the above-mentioned gas storage chambers is fixed to the above-mentioned second fixed end.

[0010] Furthermore, the above-mentioned gas storage chamber includes a left section, a right section, a first connecting section and a second connecting section, and the two ends of the above-mentioned left section and the two ends of the above-mentioned right section are smoothly connected through the above-mentioned first connecting section and the above-mentioned second connecting section respectively; the burial depth of the above-mentioned first connecting section is shallower than the burial depth of the above-mentioned left section and the above-mentioned right section; and / or, the burial depth of the above-mentioned second connecting section is shallower than the burial depth of the above-mentioned left section and the above-mentioned right section.

[0011] Furthermore, there are more than two groups of the above-mentioned gas storage chambers, and the two or more groups of the above-mentioned gas storage chambers are symmetrically arranged on both sides of the above-mentioned bulkhead. The above-mentioned gas storage chambers located on the left side of the above-mentioned bulkhead are all connected to the above-mentioned first fixed end, and the above-mentioned gas storage chambers located on the right side of the above-mentioned bulkhead are all connected to the above-mentioned second fixed end.

[0012] Furthermore, there are more than two groups of the above-mentioned gas storage chambers, and each group of the above-mentioned gas storage chambers is annular; the above-mentioned blind head is arranged between each pair of the above-mentioned gas storage chambers, the above-mentioned first fixed end is connected to one group of the above-mentioned gas storage chambers, and the above-mentioned second fixed end is connected to another adjacent group of the above-mentioned gas storage chambers.

[0013] Furthermore, it also includes a vertical shaft and a tunnel, the vertical shaft is arranged on one side of the above-mentioned blind head, the above-mentioned tunnel is located underground, and the two ends of the above-mentioned tunnel are connected to the above-mentioned vertical shaft and the above-mentioned blind head; the above-mentioned tunnel is located between the above-mentioned first fixed end and the above-mentioned second fixed end, and is connected to both the above-mentioned first fixed end and the above-mentioned second fixed end.

[0014] Furthermore, there is an anchoring structure between the gas storage chamber and the first fixed end; and / or there is an anchoring structure between the gas storage chamber and the second fixed end.

[0015] Furthermore, the gas storage chamber is provided with a left steel plate at the first fixed end, the left steel plate is sealedly connected to the left end portion of the gas storage chamber, and the first branch channel is led out from the left steel plate.

[0016] Furthermore, the gas storage chamber is provided with a right steel plate at the second fixed end, the right steel plate is sealedly connected to the right end portion of the gas storage chamber, and the second branch channel is led out from the right steel plate.

[0017] Furthermore, a reinforcement structure is provided between the inner side of the left steel plate and the inner side of the gas storage chamber.

[0018] Furthermore, a reinforcement structure is provided between the inner side of the right steel plate and the inner side of the gas storage chamber. On the other hand, a compressed air energy storage system is provided, comprising any of the above-mentioned underground gas storage chambers with a blind head.

[0019] Beneficial effects of the present invention: The underground gas storage cavern with a blind head provided by the present invention includes a blind head and at least one group of gas storage chambers, and the blind head is used for the underground gas storage cavern with a blind head. The blind head includes a first fixed end, a second fixed end and an air inlet and outlet pipe, and the first fixed end and the second fixed end are both used to fix the connection with the gas storage chamber. The air inlet and outlet pipes include a first branch, a second branch and a third branch that are interconnected, the first branch is arranged at the first fixed end, the second branch is arranged at the second fixed end, and the first branch and the second branch are both used for filling and discharging the gas storage chamber. The air inlet and outlet pipes include a first branch, a second branch and a third branch that are interconnected, the first branch and the second branch are symmetrically arranged, the third branch is cross-arranged between the first branch and the second branch, and the angle between the third branch and the first branch is equal to the angle between the third branch and the second branch. Since the inlet and outlet pipes only take in air or only exhaust air at the same time, when the underground gas storage chamber with a blind head only takes in air or only exhausts air, the impact forces at both ends of the blind head can offset each other. When the gas storage chamber is in normal gas storage, the internal pressures at both ends of the blind head can offset each other. Therefore, the blind head of this scheme is in a balanced state during normal gas storage and gas inlet and outlet.

[0020] Based on this, the proposed underground gas storage chamber with a blind head provides excellent dynamic and static stress conditions and possesses excellent mechanical properties. This not only reduces the frequency of inspection and maintenance of the underground gas storage chamber with a blind head, but also improves its lifespan and safety. A compressed air energy storage system equipped with the proposed underground gas storage chamber with a blind head can achieve large-scale, long-term, and high-capacity energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of an underground gas storage chamber with a blind head according to the present invention;

[0022] Figure 2 It is a schematic cross-sectional structural diagram of the bulkhead of the present invention;

[0023] Figure 3 yes Figure 1 A schematic cross-sectional view at point B in the middle;

[0024] Figure 4 It is a structural schematic diagram of the inclined shaft of the present invention;

[0025] Figure 5 This is another structural schematic diagram of the underground gas storage chamber with a blind head of the present invention;

[0026] Figure 6 This is another structural schematic diagram of the underground gas storage chamber with a blind head of the present invention;

[0027] Figure 7 This is a schematic structural diagram of a fourth underground gas storage chamber with a blind head according to the present invention;

[0028] Figure 8 This is a structural schematic diagram of a fifth underground gas storage chamber with a blind head according to the present invention;

[0029] Figure 9 It is a structural schematic diagram of the sixth underground gas storage cavern with a blind head according to the present invention.

[0030] In the figure: 100-blind head; 110-first fixed end; 120-second fixed end; 130-inlet and outlet air pipes; 131-first fork; 132-second fork; 133-third fork; 200-gas storage chamber; 211-left end; 212-right end; 221-left section; 222-right section; 231-first connecting section; 232-second connecting section; 241-left steel plate; 242-right steel plate; 300-inclined shaft; 410-vertical shaft; 420-tunnel; 510-anchoring structure; 520-reinforcement structure. DETAILED DESCRIPTION

[0031] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] Example 1:

[0035] like Figure 1-Figure 3 As shown, this embodiment provides an underground gas storage cavern with a blind head, comprising a blind head 100 and at least one set of gas storage chambers 200. The blind head 100 is used in the underground gas storage cavern with a blind head. Figure 2 As shown, the bulkhead 100 includes a first fixed end 110, a second fixed end 120, and an air inlet and outlet pipe 130. The first fixed end 110 and the second fixed end 120 are both used to fix the air storage chamber. The air inlet and outlet pipe 130 includes a first branch 131, a second branch 132, and a third branch 133 that are interconnected. The first branch 131 is arranged at the first fixed end 110, and the second branch 132 is arranged at the second fixed end 120. The first branch 131 and the second branch 133 are both used to charge and discharge the air storage chamber 200. The first branch 131 and the second branch 132 are arranged symmetrically, and the third branch 133 is arranged crosswise between the first branch 131 and the second branch 132. The angle between the third branch 133 and the first branch 131 is equal to the angle between the third branch 133 and the second branch 132. Since the inlet and outlet pipes only take in air or only exhaust air at the same time, when the underground gas storage chamber with a blind head only takes in air or only exhausts air, the impact forces at both ends of the blind head can offset each other. When the gas storage chamber is in normal gas storage, the internal pressures at both ends of the blind head can offset each other. Therefore, the blind head of this scheme is in a balanced state during normal gas storage and gas inlet and outlet.

[0036] Based on this, the proposed underground gas storage chamber with a blind head provides excellent dynamic and static stress conditions and possesses excellent mechanical properties. This not only reduces the frequency of inspection and maintenance of the underground gas storage chamber with a blind head, but also improves its lifespan and safety. A compressed air energy storage system equipped with the proposed underground gas storage chamber with a blind head can achieve large-scale, long-term, and high-capacity energy storage.

[0037] Furthermore, the third fork 133 is arranged perpendicular to the first fork 131 , and the third fork 133 is arranged perpendicular to the second fork 132 .

[0038] Furthermore, if Figures 1-4 As shown, there is a group of gas storage chambers 200, which are arc-shaped. The left end of the gas storage chamber 200 is fixed to the first fixed end 110 of the bulkhead, and the right end of the gas storage chamber 200 is fixed to the second fixed end 120 of the bulkhead.

[0039] Furthermore, if Figure 3-Figure 4 As shown, the gas storage chamber 200 includes a left section 221, a right section 222, a first connecting section 231, and a second connecting section 232. The ends of the left section 221 and the ends of the right section 222 are smoothly connected via the first connecting section 231 and the second connecting section 232, respectively. Optionally, the first connecting section 231 is buried shallower than the left and right sections 221, 222; and / or the second connecting section 232 is buried shallower than the left and right sections 221, 222. That is, when viewed from the bottom up, the first connecting section 231 is higher than the gas storage chambers of the left and right sections 221, 222; and / or the second connecting section 232 is higher than the gas storage chambers of the left and right sections 221, 222. Furthermore, the bulkhead 100 is located in either the left section 221 or the right section 222 of the gas storage chamber. Fluid mechanics analysis shows that the shape of the above-mentioned air storage chamber is beneficial to improving the mechanical properties of the air storage chamber.

[0040] like Figure 4 As shown, further, it also includes an inclined shaft 300, which extends from the ground near the first connecting section 231 of the gas storage chamber to the second connecting section 232 of the gas storage chamber. The inclined shaft 300 is a passage extending from the ground to the underground gas storage chamber with a blind head, which serves as the main passage for personnel entry and logistics transportation during construction. In order to increase the construction efficiency of the underground gas storage chamber with a blind head, when the gas storage chamber includes a left section 221, a right section 222, a first connecting section 231 and a second connecting section 232, and the left section 221 and the right section 222 are lower than the first connecting section 231 and the second connecting section 232, the extension direction of the inclined shaft 300 is from the ground above the first connecting section to the second connecting section, which makes the slope of the inclined shaft within a reasonable range and can construct the left section and the right section separately starting from the second connecting section.

[0041] like Figure 4 As shown, it further includes a vertical shaft 410 and a tunnel 420. The vertical shaft 410 is arranged on one side of the blind head 100, and the tunnel 420 is located underground. The two ends of the tunnel 420 connect the vertical shaft 410 and the blind head 100. The vertical shaft and the tunnel are also passages for personnel to enter and logistics transportation during the period. The tunnel is located underground, and the vertical shaft extends from the ground to the underground. One end of the tunnel is connected to the vertical shaft, and the other end leads to the construction site. There can be vertical lifting machinery in the vertical shaft, and there can be material transportation tracks in the tunnel. Since the blind head is the safest structure in the underground gas storage with a blind head, vertical shafts and tunnels can be set up near it for separate construction. In addition, since the blind head needs to be arranged with inlet and outlet pipes, the two ends of the inlet and outlet pipes connect the underground gas storage with a blind head and other equipment for compressed air energy storage, such as compressors and expanders. The vertical shaft and tunnel also serve as passages for leading inlet and outlet pipes from the underground gas storage with a blind head in the later stage.

[0042] like Figure 4 As shown, further, the tunnel 420 is located between the first fixed end 110 and the second fixed end 120 of the bulkhead 100 and is in communication with both the first fixed end 110 and the second fixed end 120. The first fixed end 110 of the bulkhead 100 is used to be fixedly connected to the left end 211 of the gas storage chamber, and the second fixed end 120 of the bulkhead 100 is used to be fixedly connected to the right end 212 of the gas storage chamber. Both of these locations are construction sites with many process steps. Through the tunnel 420 and the shaft 410, the first fixed end 110 and the second fixed end 120 of the bulkhead 100 can be constructed simultaneously, thereby increasing the construction speed.

[0043] Furthermore, if Figure 2 As shown, an anchoring structure 510 is provided between the left end 211 of the gas storage chamber and the first fixed end 110 of the bulkhead; and / or an anchoring structure 510 is provided between the right end 212 of the gas storage chamber and the second fixed end 120 of the bulkhead. The left and right ends of the gas storage chamber are prone to stress concentration and are weak links in the gas storage chamber. The external anchoring structure can absorb the forces at the left and / or right ends of the gas storage chamber.

[0044] Furthermore, if Figure 3 The anchoring structures 510 are all anchoring bars, which can be straight bars, L-shaped bars, or wavy bars.

[0045] Furthermore, if Figure 3As shown, the left end of the gas storage chamber includes a left steel plate 241, which is sealed to the left end 211 of the gas storage chamber. Furthermore, the right end of the gas storage chamber includes a right steel plate 242, which is sealed to the right end 212 of the gas storage chamber. The first branch 131 of the blind head extends from the left steel plate 241, and the second branch 132 extends from the right steel plate 242. The left and right steel plates are used to seal the left and right ends of the gas storage chamber, and the first and second branches of the blind head are fixedly connected to the left and right steel plates, respectively.

[0046] Furthermore, if Figure 2 As shown, a reinforcement structure is provided between the inner side of the left steel plate and the inner side of the gas storage chamber. Specifically, a reinforcement structure 520 is provided on the inner side of the left steel plate 241 of the gas storage chamber and the inner side of the left end portion of the gas storage chamber to increase the rigidity of the left end portion of the gas storage chamber. Furthermore, a reinforcement structure is provided between the inner side of the right steel plate and the inner side of the gas storage chamber; a reinforcement structure 520 is provided on the inner side of the right steel plate 242 of the gas storage chamber and the inner side of the right end portion 212 of the gas storage chamber to increase the rigidity of the right end portion of the gas storage chamber. The above-mentioned reinforcement structure 520 may be a reinforcing rib plate. Preferably, arranging the left steel plate 241 and the right steel plate 242 at the same time can effectively improve the stability of the entire system.

[0047] The construction steps for the underground gas storage chamber with a blind head in this embodiment are as follows: First, dig an inclined shaft, vertical shaft, tunnel, or other construction channel at the surveyed location. Then, excavate the rough hole for the gas storage chamber and construct the main body of the gas storage chamber, reserving construction positions for the left and right ends of the gas storage chamber. Finally, construct the connection between the left end of the gas storage chamber and the first fixed end of the blind head, and between the right end of the gas storage chamber and the second fixed end of the blind head.

[0048] Example 2:

[0049] like Figure 5 As shown, this embodiment provides an underground gas storage cavern with a bulkhead. The gas storage caverns 200 have two or more groups, and the gas storage caverns are symmetrically arranged on both sides of the bulkhead 100. The bulkhead 100 includes a first fixed end, a second fixed end, and an air inlet and outlet pipe. The gas storage caverns on the left side of the bulkhead are all connected to the first fixed end of the bulkhead, and the gas storage caverns on the right side of the bulkhead are all connected to the second fixed end of the bulkhead.

[0050] This embodiment includes multiple groups of gas storage chambers, which are symmetrically arranged relative to the bulkhead. The gas storage chambers on each side are connected to the first and second fixed ends of the bulkhead. The inlet and outlet pipes also only take in air or only discharge air at the same time. Therefore, when the gas storage chambers on the left and right sides of the bulkhead only take in air or only discharge air at the same time, the impact forces at both ends of the bulkhead can offset each other. When all the gas storage chambers are in normal air storage, the internal pressures at both ends of the bulkhead can offset each other. Therefore, the bulkhead of this solution is in a balanced state during normal air storage and air inlet and outlet.

[0051] Example 3:

[0052] like Figure 6-Figure 9 As shown, this embodiment provides an underground gas storage chamber with a bulkhead. The gas storage chambers 200 are arranged in two or more groups. Each group of gas storage chambers 200 is annular. A bulkhead 100 is provided between each of the gas storage chambers. The first fixed end 110 of the bulkhead 100 is connected to one group of gas storage chambers 200, and the second fixed end 120 is connected to another adjacent group of gas storage chambers 200.

[0053] like Figure 6-Figure 7 As shown, there are two or three groups of gas storage chambers 200, and the two gas storage chambers 200 are nested and arranged. At this time, the first fixed end 110 and the second fixed end 120 of the bulkhead 100 are connected to the two adjacent groups of gas storage chambers 200 respectively.

[0054] like Figure 7-Figure 9 As shown, there are two or three groups of gas storage chambers 200 , and two of the gas storage chambers 200 are arranged side by side. In this case, the bulkhead 100 is arranged between two adjacent groups of gas storage chambers 200 .

[0055] Figure 6-Figure 9 The structure shown is that a group of bulkheads 100 are arranged between two groups of gas storage chambers 200. It should be noted that more than two groups of bulkheads 100 can be arranged between the two groups of gas storage chambers 200, all of which are within the scope of protection of this application.

[0056] Example 4:

[0057] This embodiment discloses a compressed air energy storage system, including any of the underground gas storage chambers with a blind end of Embodiment 1. Due to the excellent mechanical properties of the underground gas storage chambers with a blind end of Embodiment 1, the compressed air energy storage system can achieve large-scale, long-term continuous operation and large-capacity energy storage.

[0058] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An underground gas storage cavern with a blind head, characterized in that: It includes a bulkhead and at least one set of gas storage chambers; The bulkhead includes a first fixed end, a second fixed end, and an air inlet and outlet pipe; the first fixed end and the second fixed end are both used to fixedly connect to the air storage chamber; the air inlet and outlet pipes include a first branch, a second branch, and a third branch that are interconnected; the first branch is provided at the first fixed end, the second branch is provided at the second fixed end, and the first branch and the second branch are both used for filling and deflating the air storage chamber; the first branch and the second branch are symmetrically arranged, the third branch is arranged crosswise between the first branch and the second branch, and the angle between the third branch and the first branch is equal to the angle between the third branch and the second branch; There is a group of gas storage chambers, each of which is arc-shaped, with the left end of each gas storage chamber fixed to the first fixed end, and the right end of each gas storage chamber fixed to the second fixed end; The gas storage chamber includes a left section, a right section, a first connecting section, and a second connecting section. Both ends of the left section and both ends of the right section are smoothly connected through the first connecting section and the second connecting section respectively. The burial depth of the first connecting segment is shallower than that of the left segment and the right segment; and / or the burial depth of the second connecting segment is shallower than that of the left segment and the right segment.

2. The underground gas storage chamber with a blind head according to claim 1, characterized in that: There are more than two groups of gas storage chambers, and the two or more groups of gas storage chambers are symmetrically arranged on both sides of the bulkhead. The gas storage chambers located on the left side of the bulkhead are all connected to the first fixed end, and the gas storage chambers located on the right side of the bulkhead are all connected to the second fixed end.

3. The underground gas storage chamber with a blind head according to claim 1, characterized in that: There are more than two groups of gas storage chambers, and each group of gas storage chambers is annular; the blind end is provided between each pair of gas storage chambers, the first fixed end is connected to one group of gas storage chambers, and the second fixed end is connected to another adjacent group of gas storage chambers.

4. The underground gas storage chamber with a blind head according to claim 1, characterized in that: It also includes a vertical shaft and a tunnel, the vertical shaft is arranged on one side of the blind head, the tunnel is located underground, and the two ends of the tunnel are respectively connected to the vertical shaft and the blind head; the tunnel is located between the first fixed end and the second fixed end, and is connected to both the first fixed end and the second fixed end.

5. The underground gas storage chamber with a blind head according to claim 1, characterized in that: An anchoring structure is provided between the gas storage chamber and the first fixed end; and / or an anchoring structure is provided between the gas storage chamber and the second fixed end.

6. The underground gas storage chamber with a blind head according to claim 1, characterized in that: The gas storage chamber is provided with a left steel plate at the first fixed end. The left steel plate is sealed and connected to the left end of the gas storage chamber. The first branch channel is led out from the left steel plate.

7. The underground gas storage chamber with a blind head according to claim 1, characterized in that: The gas storage chamber is provided with a right steel plate at the second fixed end, and the right steel plate is sealed and connected to the right end portion of the gas storage chamber; the second branch channel is led out from the right steel plate.

8. The underground gas storage chamber with a blind head according to claim 6, characterized in that: A reinforcement structure is provided between the inner side of the left steel plate and the inner side of the gas storage chamber.

9. The underground gas storage chamber with a blind head according to claim 7, characterized in that: A reinforcement structure is provided between the inner side of the right steel plate and the inner side of the gas storage chamber.

10. A compressed air energy storage system, characterized in that: The invention comprises an underground gas storage cavern with a blind head as described in any one of claims 1 to 9.

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