Tunnel type gas storage chamber for compressed air energy storage

Abstract

The invention relates to the technical field of compressed air energy storage, in particular to a tunnel type air storage chamber for compressed air energy storage. By arranging the first flow guide plate or the bent pipeline, air is inflated in the air inlet direction in the axial direction of the annular chamber in a one-way mode, so that annular flowing is formed in the annular chamber, and it is avoided that after inflation airflow directly blows the hole wall, vortex is formed at the hole wall; and then two air flows which are opposite in direction and equivalent in flow are generated to flow towards the two sides respectively and meet in a certain section in the annular chamber to form a zero flow velocity phenomenon, so that the risk of generating a local extreme high temperature phenomenon in an air inflation stage is reduced, and the air inflation speed is increased, the air storage efficiency is improved, and the energy utilization rate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of compressed air energy storage, in particular to a tunnel type air storage chamber for compressed air energy storage. Background Art

[0002] Compressed air energy storage technology is a new energy storage method that uses high-pressure air to store energy. Its working principle is to use excess energy in the grid to drive the compressor to compress the air and store it in the gas storage device when the grid load is low. When the grid load is peak, the high-pressure air is released to drive the expander to do work and convert the stored energy into electrical energy. In this technology, the tunnel-type underground artificial chamber is a type of gas storage device with the advantages of convenient construction, safety and reliability, and flexible layout methods, becoming an important part of the compressed gas energy storage power station.

[0003] At present, the research on the layout of compressed air energy storage tunnel gas storage chambers mostly adopts straight or annular shapes for single chambers. For straight-cylinder gas storage chambers, they are arranged in a straight line underground. Although it is more convenient to construct than annular ones, their end seals are blind ends, which are weak links in daily maintenance and are not conducive to increasing the number of gas storage chambers. For this reason, the existing technology often adopts annular gas storage chamber structures to avoid the need to inspect the blind ends of the existing gas storage system, thereby reducing the workload of repair and maintenance. Figure 1 The structure of an annular gas storage chamber shown in the figure includes an annular gas storage chamber 10 and a shaft 20, and the shaft 20 is connected to the top of the gas storage chamber 10. However, in the actual research process, according to the air flow principle and simulation verification, it is found that although the existing annularly arranged chamber structure is annular, since the intersection of the auxiliary chamber and the gas storage chamber is generally orthogonal or approximately orthogonal, the inflation airflow will form a vortex at the cave wall after blowing directly on the cave wall, and then two airflows with opposite directions and equivalent flow rates will flow to both sides respectively. Finally, the two airflows will meet at a certain cross section in the gas storage cave and tend to be stationary. The whole chamber forms a temperature stratification from the inlet end to the intersection of the airflow, which will cause a large loss of energy and produce an extremely high temperature phenomenon. This extreme high temperature environment will cause irreversible damage to the structure and materials of the gas storage chamber. For example, the lining structure will crack and peel off, the mechanical properties of the lining concrete will be greatly degraded, and even burst; in addition, if the chamber sealing structure uses rubber materials, it will oxidize, degrade, and deform significantly under high temperature conditions, and even completely lose its shape and structural stability. In addition, adhesive materials such as epoxy resin will also completely fail under high temperature, and the structural sealing performance will be greatly degraded or even fail. Local extreme high temperatures will shorten the life of the chamber, reduce the safety, stability and durability of the chamber structure, and the sealing of the chamber will be difficult to ensure.

[0004] Therefore, in order to avoid the problem of local extreme high temperature, the prior art usually adopts the following two inflation methods during the first inflation of the gas storage chamber or inflation after maintenance: ① Either the normal rate of inflation is used at the entrance, then it is necessary to stop the inflation when the temperature exceeds a certain value, and continue the inflation after the local high temperature in the chamber is reduced to the normal value through heat transfer; ② Either the inflation rate at the entrance of the gas storage chamber needs to be reduced to a small enough level to avoid local high temperature during the gas storage process. Both of these chamber inflation methods take a long time and have low gas storage efficiency. In addition, the prior art also has a method of arranging multiple fans in the gas storage chamber to speed up the gas flow, thereby promoting temperature heat transfer and reducing the chamber temperature, but this method has high requirements on the electrical performance of the fan, such as pressure resistance and heat resistance, high cost, and difficult maintenance, and has the problem of poor economic efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a tunnel-type gas storage chamber for compressed air energy storage in view of the problem that the annular chamber structure in the prior art is prone to local extreme high temperatures, and the inflation speed needs to be slowed down during the inflation process, resulting in long gas storage time and low gas storage efficiency.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A tunnel-type gas storage chamber for compressed air energy storage comprises an annular chamber and an auxiliary chamber, wherein the auxiliary chamber is communicated with the outside, the annular chamber and the auxiliary chamber are connected, a sealing body for closing the annular chamber is provided in the auxiliary chamber, a gas inlet and outlet pipe is provided at the sealing body, the gas inlet and outlet pipe is used to communicate the annular chamber and the auxiliary chamber, a plurality of first guide plates are provided in the annular chamber, each of the first guide plates adopts an arc-shaped cross-section structure, the bottom of the first guide plate is fixedly connected to the annular chamber, a plurality of the first guide plates are arranged at intervals, and the plurality of the first guide plates are used to receive the airflow blown out by the gas inlet and outlet pipe and guide the airflow unilaterally along the axial direction of the annular chamber.

[0007] In the above-mentioned tunnel-type gas storage chamber, the annular chamber is used to store compressed air, and the auxiliary chamber is used for transportation; the sealing body is used to seal the annular chamber to maintain the stable air pressure in the annular chamber and prevent the high-pressure air in the annular chamber from leaking through the auxiliary chamber. At the sealing body, air is inflated into the annular pipe through the gas inlet and outlet pipes to realize gas compression energy storage. This solution can achieve smooth turning of the airflow and avoid the airflow from blowing onto the cave wall to form vortices by arranging several first guide plates in an arc-shaped structure in the annular chamber to receive the airflow blown out of the gas inlet and outlet pipes. Specifically, the airflow blown out from the gas inlet and outlet pipes can be diverted between several first guide plates arranged at intervals. After the diversion, the air flows in layers, and the interference between the layers is small, thereby reducing the energy impact of a single airflow. Then, the small airflows are guided unilaterally along the axis direction of the annular chamber to enter the annular chamber for convergence, so that the airflow flows around the annular chamber in an annular direction under the inflation pressure and realizes a one-way circulation, thereby accelerating the temperature transfer, avoiding the phenomenon that the inlet airflow blows directly onto the cave wall and generates vortices at the cave wall, thereby generating temperature stratification, improving the temperature uniformity of the chamber, and reducing the risk of generating local extreme high temperatures, thereby facilitating increasing the inflation speed, shortening the gas storage time, improving the gas storage efficiency, and ensuring the safety of the sealing structure.

[0008] The above-mentioned gas storage chamber can utilize the inflation flow velocity to achieve annular flow, with low energy loss, high energy utilization rate, good temperature control effect, good economy and easy maintenance; and the above-mentioned gas storage chamber structure avoids the direct collision of the inlet airflow with the cave wall during inflation, which is beneficial to reducing the risk of generating eddy currents at the cave wall and reducing the risk of causing vibration of the sealing steel lining, thereby helping to ensure the stability of the chamber structure.

[0009] As a preferred embodiment of the present invention, the arc length of each of the first guide plates is arranged from short to long from the side where the outer wall of the annular chamber is located to the side where the inner wall is located, and the first guide plate closest to the inner wall of the annular chamber is connected to the gas inlet and outlet pipe, and the arrangement width a of several of the first guide plates is greater than the diameter of the gas inlet and outlet pipe, so as to facilitate receiving the airflow blown out from the gas inlet and outlet pipe.

[0010] As a preferred solution of the present invention, the auxiliary chamber and the annular chamber are both arranged horizontally, that is, the auxiliary chamber and the annular chamber are basically in a horizontal position or arranged close to horizontal at a small inclination angle, which is more convenient for construction, and the excavation of the chamber has little impact on the surrounding rock. When the auxiliary chamber and the annular chamber are arranged horizontally, the end of the auxiliary chamber is laterally connected to the side wall of the annular chamber. Compared with the method of setting a vertical shaft at the top of the annular chamber and suspending a plugging body at the bottom of the vertical shaft, this method can better construct and support the plugging body, which is beneficial to the safety and sealing of the chamber energy storage.

[0011] As a preferred solution of the present invention, the sealing body is located at the connecting end of the auxiliary chamber and the annular chamber, and the sealing body is arranged flush with the side wall of the annular chamber, which neither occupies the air storage space nor prevents the airflow from staying at the intersection of the auxiliary chamber and the annular chamber for a long time.

[0012] As a preferred embodiment of the present invention, the annular chamber includes a first straight track, a second straight track, a first curve and a second curve, the first straight track, the first curve, the second straight track and the second curve are connected end to end in sequence, and the auxiliary chamber is orthogonally connected to the first straight track / the second straight track / the first curve / the second curve.

[0013] As a preferred embodiment of the present invention, the tunnel-type gas storage chamber further includes an inclined shaft, one end of which is connected to the auxiliary chamber and the other end is connected to the outside world. The inclined shaft and the annular chamber are arranged separately in horizontal projection to avoid setting a vertical shaft above the gas storage chamber to affect the stability of the surrounding rock and thus affect the energy storage safety of the gas storage chamber.

[0014] As another preferred solution of the present invention, the several first guide plates mentioned above can also be replaced by curved pipes, which are connected to the gas inlet and outlet pipes. The outlet direction of the gas inlet and outlet pipes is changed by the curved pipes, so that the airflow direction is consistent with the axial direction of the annular chamber, which is convenient for gas flow; the inflation is guided on one side by the curved pipes, so that the inflation flow rate can be used to realize the annular flow of the inlet airflow, avoiding the phenomenon that the inlet airflow blows directly to the cave wall and generates eddies at the cave wall, thereby generating temperature stratification, thereby improving the temperature uniformity of the cave chamber, reducing the risk of generating local extreme high temperatures, and improving the gas storage efficiency; in addition, it can also avoid the inflation airflow from directly colliding with the inner wall of the cave chamber, which is conducive to ensuring the stability of the cave chamber structure.

[0015] As a preferred solution of the present invention, the curved pipe is provided with a second guide plate at the corner, the second guide plate is in an arc-shaped structure, and the second guide plate is used to receive the air inlet airflow of the gas inlet and outlet pipe and smoothly guide it to the direction of the air outlet. The second guide plate is provided at the curved part of the curved pipe, which can be used to eliminate the vortex at the bend and effectively reduce the flow velocity difference between the inner and outer sides of the pipe after the bend.

[0016] As a preferred solution of the present invention, the number of the second guide plates is set to be several, and the several second guide plates are arranged in rows at the corners. The second guide plates are arranged at intervals to divert the gas flow in and out of the pipeline, reduce the impact energy of a single airflow, reduce heat loss, and help improve energy utilization.

[0017] As a preferred solution of the present invention, a buttress is provided in the annular chamber, the buttress is located at the bottom of the gas inlet and outlet pipe, and the buttress is fixedly connected to the curved pipe. During the gas filling and deflation process, the gas inlet and outlet pipe vibrates strongly and has a large span. By providing buttresses in the annular chamber to reinforce the pipe, the service life of the curved pipe is extended.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: The tunnel-type gas storage chamber provided by the present invention is provided with a first guide plate or a curved pipe to allow unidirectional inflation in the air intake direction along the axial direction of the annular chamber, so as to form a self-circulating airflow in the annular chamber to accelerate temperature heat transfer, avoid the inflation airflow forming a vortex at the wall of the annular chamber due to vertically blowing toward the wall of the annular chamber, and avoid the phenomenon that two airflows with opposite directions and equivalent flow rates meet at a certain cross-section of the annular chamber to form zero flow rate, thereby reducing the risk of local extreme high temperature during the inflation stage. The chamber temperature is evenly distributed and the temperature control performance is good, which is conducive to accelerating the inflation speed and improving the gas storage efficiency. The chamber also has high energy utilization, good maintainability and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an annular gas storage chamber structure in the prior art; Figure 2 It is a structural schematic diagram of a tunnel-type air storage chamber for compressed air energy storage in Example 1; Figure 3 yes Figure 2 A magnified view of the structure at the intersection of the middle auxiliary chamber and the annular chamber; Figure 4 yes Figure 2 A schematic diagram of the structural arrangement of the first guide plate; Figure 5 It is a structural schematic diagram of a tunnel-type air storage chamber for compressed air energy storage in Example 2; Figure 6 is a schematic structural diagram of another tunnel-type air storage chamber for compressed air energy storage in Example 2; Figure 7 It is a structural schematic diagram of a curved pipe with a second guide plate arranged at a corner.

[0020] Icons: 10-gas storage chamber; 20-vertical shaft; 1-annular chamber; 11-first straight channel; 12-second straight channel; 13-first bend; 14-second bend; 15-outer wall; 16-inner wall; 2-auxiliary chamber; 3-sealing body; 4-gas inlet and outlet pipes; 5-first guide plate; 6-second guide plate. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] 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 used to limit the present invention.

[0023] Example 1 A tunnel type air storage chamber for compressed air energy storage, such as Figure 2-Figure 4 As shown, it includes a gas inlet and outlet pipeline 4, a blocking body 3, an annular chamber 1, an auxiliary chamber 2 and a flow guide device. The auxiliary chamber 2 is connected to the outside and is used for transportation; the annular chamber 1 forms an annular gas storage space for storing compressed air, and the annular chamber 1 and the auxiliary chamber 2 are connected; a blocking body 3 for sealing the annular chamber 1 is arranged in the auxiliary chamber 2 to maintain the air pressure in the annular chamber 1 stable and prevent the high-pressure air in the annular chamber 1 from leaking through the auxiliary chamber 2; a gas inlet and outlet pipeline 4 is arranged at the blocking body 3, and the gas inlet and outlet pipeline 4 is used to connect the annular chamber 1 and the auxiliary chamber 2; the flow guide device is arranged in the annular chamber 1, and the inlet airflow direction is changed by the flow guide device to form a circulating airflow inside the gas storage chamber, thereby achieving the purpose of temperature control.

[0024] In this embodiment, the flow guide device includes a plurality of first flow guide plates 5, each of which has an arc-shaped cross-section structure, and the bottom of the first flow guide plate 5 is fixedly connected to the annular chamber 1. The plurality of first flow guide plates 5 are arranged at intervals, and the plurality of first flow guide plates 5 are used to receive the airflow blown out of the gas inlet and outlet pipes 4 and guide the airflow unilaterally along the axial direction of the annular chamber 1.

[0025] In the above-mentioned tunnel-type gas storage chamber, the sealing body 3 of the auxiliary chamber 2 is used to close the annular chamber 1, and gas is inflated into the annular pipe through the gas inlet and outlet pipe 4 at the sealing body 3 to realize gas compression energy storage. The present solution can realize smooth turning of the airflow and avoid the airflow from blowing to the cave wall to form vortex by arranging several first guide plates 5 of arc-shaped structure in the annular chamber 1 to receive the airflow blown out by the gas inlet and outlet pipes 4. Specifically, the airflow blown out from the gas inlet and outlet pipes can be diverted between several first guide plates 5 arranged at intervals. After the diversion, the air flows in layers, and the interference between the layers is small, thereby reducing the energy impact of a single airflow. Then, the small airflows are guided unilaterally along the axial direction of the annular chamber 1 to enter the annular chamber 1 for convergence, so that the airflow flows around the annular chamber in an annular direction under the inflation pressure and realizes a one-way circulation, thereby accelerating the temperature heat transfer, avoiding the inlet airflow from blowing directly to the cave wall and generating vortex at the cave wall to generate temperature stratification, improving the temperature uniformity of the chamber, and reducing the risk of generating local extreme high temperature, thereby facilitating increasing the inflation speed, shortening the gas storage time, and improving the gas storage efficiency. In addition, by reducing the risk of local extreme high temperatures in the chamber, it is helpful to avoid the situation where the chamber sealing layer is damaged due to high temperature, thereby ensuring the safety of the gas storage chamber sealing structure.

[0026] The simple structure of the first guide plate can make the airflow stratified, realize smooth turning of the airflow at the inlet, control the unidirectional flow of the airflow, avoid the formation of vortex, and promote the smooth flow of the airflow. Therefore, the temperature distribution during the inflation process will be more uniform, which is more conducive to the temperature control of the gas storage cavern. Compared with the existing technology of fan relay, extending the ventilation pipe to open multiple holes for inflation (Jiang Zhongming has a similar patent), and adding wing-type heat conduction devices, the guide plate method is simple and highly reliable.

[0027] Specifically, in this embodiment, the gas inlet and outlet pipeline 4 adopts a general straight pipeline with a control switch valve inside. The gas inlet and outlet pipeline 4 is pre-buried in the blocking body 3 and is used to inflate the annular chamber 1; the arc length of each first guide plate 5 is arranged from short to long from the side where the outer wall 15 of the annular chamber 1 is located to the side where the inner wall 16 is located. Several first guide plates 5 are preferably arranged in a row, and their number is preferably adjusted according to the diameter of the gas inlet and outlet pipeline 4. The arrangement of the first guide plates 5 is shown in FIG. Figure 4As shown, one end of each first guide plate 5 is parallel to the outlet direction of the gas inlet pipe, and the other end is parallel or approximately parallel to the wall of the annular chamber 1, that is, it is arranged along the axial direction of the annular chamber 1. The two ends of each first guide plate 5 are aligned with each other and are arranged coaxially in the same direction, so that the spacing size is basically consistent along the line direction. In this embodiment, the first guide plate 5 can adopt a reinforced concrete structure and be integrally formed with the chamber lining. The first guide plate 5 is coated with pressure-resistant and temperature-resistant material to make the surface smooth; the end of the first guide plate 5 closest to the inner wall 16 of the annular chamber 1 is extended until it is connected to the side of the gas inlet and outlet pipe 4 away from the guiding direction, blocking the airflow from diffusing in the opposite direction, so that the inflation airflow can be introduced unidirectionally along the arc section of the first guide plate 5; further, in this embodiment, it is preferred that the arrangement width a of several first guide plates 5 is greater than the diameter of the gas inlet and outlet pipe 4, so that a large amount of inflation airflow can be blown to the gap between adjacent first guide plates 5 as much as possible for diversion, which is beneficial to reduce the cyclic pressurization impact of a single airflow on the first guide plate 5, thereby extending the service life of the first guide plate 5, and is also beneficial to reduce airflow turbulence or vortex flow, reduce energy loss and inlet temperature.

[0028] Furthermore, in the present embodiment, the annular chamber 1 comprises a first straight road 11, a second straight road 12, a first curve 13 and a second curve 14, the first straight road 11, the first curve 13, the second straight road 12 and the second curve 14 are connected end to end in sequence, and the auxiliary chamber 2 is orthogonally connected to the first straight road 11 / the second straight road 12 / the first curve 13 / the second curve 14; the sealing body 3 is located at the connecting end of the auxiliary chamber 2 and the annular chamber 1, and the sealing body 3 is flush with the side wall of the annular chamber 1, which neither occupies the gas storage space nor can it avoid the airflow from staying at the intersection of the auxiliary chamber 2 and the annular chamber 1 for a long time. In this embodiment, the auxiliary chamber 2 and the annular chamber 1 are both arranged horizontally, that is, the auxiliary chamber 2 and the annular chamber 1 are basically in a horizontal position or arranged nearly horizontally at a small inclination angle, the first straight road 11 and the second straight road 12 are basically in the same horizontal plane, and the side walls of the auxiliary chamber 2 and the annular chamber 1 are nearly orthogonally connected. During construction, the plugging body 3 can have better supporting force, higher safety, more convenient construction, and less impact on the overlying surrounding rock.

[0029] Furthermore, the above-mentioned tunnel-type gas storage chamber also includes an inclined shaft, one end of which is connected to the auxiliary chamber 2 and the other end is connected to the outside world. The inclined shaft and the annular chamber are arranged separately in horizontal projection to avoid setting a vertical shaft above the gas storage chamber to affect the stability of the surrounding rock and thus affect the energy storage safety of the gas storage chamber.

[0030] The simulation results show that after the inlet gas passes through the plugging body 3 from the gas inlet and outlet pipe 4 and enters the annular chamber 1 along the first guide plate 5, it basically flows into the chamber along the direction parallel to the wall of the annular chamber 1. After the flow field stabilizes, the following is formed: Figure 2As shown in the circulating airflow, the air velocity distribution inside the annular chamber 1 is relatively uniform, the temperature distribution is uniform, and there is no local extreme high temperature phenomenon.

[0031] The above-mentioned gas storage chamber can utilize the inflation flow velocity to achieve annular flow, with low energy loss, high energy utilization rate, good temperature control effect, good economy and easy maintenance; and the above-mentioned gas storage chamber structure avoids the direct collision of the inlet airflow with the cave wall during inflation, which is beneficial to reducing the risk of generating eddy currents at the cave wall and reducing the risk of causing vibration of the sealing steel lining, thereby helping to ensure the stability of the chamber structure.

[0032] Example 2 Based on Example 1, this embodiment further provides a tunnel-type gas storage chamber for compressed air energy storage, such as Figure 5 or Figure 6 As shown, the main difference is that the above-mentioned flow guide device is replaced by a curved pipe, and the curved pipe is connected to the gas inlet and outlet pipe 4; the curved pipe can be detachably connected to the gas inlet and outlet pipe 4 through a joint, or can be integrally connected to the gas inlet and outlet pipe 4. The inlet airflow direction can also be changed by the curved pipe, so that a circulating airflow is formed inside the gas storage chamber, thereby achieving the purpose of temperature control.

[0033] In this embodiment, the curved pipe and the gas inlet and outlet pipe 4 are preferably set as an integrated structure with a simple structure. In this embodiment, the bending angle of the curved pipe should be preferably to ensure that the outlet direction is parallel to the wall of the gas storage chamber. During the inflation and deflation process, since the vibration of the curved pipe is strong and large in amplitude due to the suspended setting, for the service life of the curved pipe, it is preferred to set a pier at the bottom of the curved pipe, the pier is fixedly connected to the annular chamber 1, and the curved pipe is fixedly installed on the pier to reduce vibration. Among them, the cross-section of the pier should not be too large to avoid occupying too much gas storage space.

[0034] The inlet gas passes through the plugging body 3 from the gas inlet and outlet pipe 4, and enters the gas storage chamber in a unidirectional direction parallel to the wall of the annular chamber 1 through the curved pipe part. After simulation verification, the flow field is stabilized and a Figure 5 or Figure 6 As shown in the circulating airflow, the air velocity distribution inside the annular chamber 1 is relatively uniform, the temperature distribution is uniform, and no local extreme high temperature phenomenon occurs.

[0035] Furthermore, since the air velocity of the gas in and out of the pipe 4 is relatively high, a large velocity loss will occur at the bend of the curved pipe, which will also increase the energy in the gas storage chamber. Therefore, in order to reduce the air flow loss at the bend of the curved pipe, the embodiment Figure 7As shown, a row of second guide plates 6 are arranged at the corner of the curved pipe, and the second guide plates 6 are used to receive the airflow at the inlet of the gas inlet and outlet pipe 4 and smoothly guide it to the outlet direction. Specifically, the second guide plates 6 are arc-shaped; the number of second guide plates 6 is set to be several, and the structural dimensions of several second guide plates 6 can be set to be the same. Several second guide plates 6 are arranged in rows at the corners, and the arrangement spacing can be controlled according to 0.5m-1.5m. The gas inlet and outlet pipe 4 is diverted by several second guide plates 6, reducing the impact energy of a single airflow and reducing heat loss. The setting of the second guide plates 6 can change the inlet airflow direction of the gas storage chamber and reduce the loss of airflow, thereby improving energy utilization and increasing gas storage efficiency.

[0036] The simple structure of the second guide plate 6 can allow the airflow to be stratified, achieve smooth turning of the airflow at the bend of the curved pipe, control the unidirectional flow of the airflow, avoid the formation of vortices in the curved pipe, and promote the airflow to flow smoothly into the air storage chamber along the curved pipe, so that the temperature distribution during the inflation process will be more uniform, which is more conducive to the temperature control of the air storage chamber.

[0037] According to numerical simulation experiments, for a gas inlet and outlet pipeline 4 with a diameter of 1 m, arranging five second guide plates 6 in a row can eliminate vortices at the bends of the curved pipeline and effectively reduce the flow velocity difference between the inner and outer sides of the pipeline after the bend.

[0038] It should be noted that, in the description of the specific embodiments of the present invention, the terms "horizontal" and "parallel" and the like, unless otherwise specified, do not mean that the corresponding structures are required to be absolutely horizontal or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding structures are set in directions such as "horizontal" and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding structure is arranged within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0039] In addition, the expressions “first”, “second”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tunnel-type gas storage chamber for compressed air energy storage, comprising an annular chamber and an auxiliary chamber (2), wherein the auxiliary chamber (2) is in communication with the outside, the annular chamber (1) and the auxiliary chamber (2) are connected, a sealing body (3) for sealing the annular chamber (1) is provided in the auxiliary chamber (2), a gas inlet and outlet pipeline (4) is provided at the sealing body (3), and the gas inlet and outlet pipeline (4) is used to connect the annular chamber (1) and the auxiliary chamber (2), characterized in that: A plurality of first guide plates (5) are arranged in the annular chamber (1), each of the first guide plates (5) having an arc-shaped cross-section structure, the bottom of the first guide plate (5) being fixedly connected to the annular chamber (1), the plurality of first guide plates (5) being arranged at intervals, and the plurality of first guide plates (5) being used to receive the airflow blown out of the gas inlet and outlet pipe (4) and to guide the airflow unilaterally along the axial direction of the annular chamber (1).

2. The tunnel type gas storage chamber according to claim 1, characterized in that: The arc length of each of the first guide plates (5) is arranged from short to long from the side where the outer wall (15) of the annular chamber (1) is located to the side where the inner wall (16) is located, and the first guide plate (5) closest to the inner wall (16) of the annular chamber (1) is arranged to be butt-jointed with the gas inlet and outlet pipe (4), and the arrangement width a of a plurality of the first guide plates (5) is greater than the diameter of the gas inlet and outlet pipe (4).

3. The tunnel type gas storage chamber according to claim 1, characterized in that: The auxiliary chamber (2) and the annular chamber (1) are both arranged horizontally.

4. The tunnel type gas storage chamber according to claim 1, characterized in that: The blocking body (3) is located at the connection end between the auxiliary chamber (2) and the annular chamber (1), and the blocking body (3) is arranged flush with the side wall of the annular chamber (1).

5. The tunnel type gas storage chamber according to any one of claims 1 to 4, characterized in that: The annular chamber (1) comprises a first straight track (11), a second straight track (12), a first curve (13) and a second curve (14); the first straight track (11), the first curve (13), the second straight track (12) and the second curve (14) are connected end to end in sequence; and the auxiliary chamber (2) is orthogonally connected to the first straight track (11) / the second straight track (12) / the first curve (13) / the second curve (14).

6. The tunnel type gas storage chamber according to any one of claims 1 to 4, characterized in that: It also includes an inclined shaft, one end of which is connected to the auxiliary chamber (2) and the other end of which is connected to the outside world, and the inclined shaft and the annular chamber are arranged separately in horizontal projection.

7. The tunnel type gas storage chamber according to any one of claims 2 to 4, characterized in that: A plurality of the first guide plates (5) are replaced with curved pipes, and the curved pipes are connected to the gas inlet and outlet pipes (4).

8. The tunnel type gas storage chamber according to claim 7, characterized in that: The curved pipe is provided with a second guide plate (6) at a corner, the second guide plate (6) being of an arc-shaped structure, and the second guide plate (6) is used to receive the air inlet airflow of the gas inlet and outlet pipe (4) and smoothly guide it in the direction of the air outlet.

9. The tunnel type gas storage chamber according to claim 8, characterized in that: The number of the second guide plates (6) is set to be a plurality, and the plurality of second guide plates (6) are arranged at intervals in rows at the corners.

10. The tunnel type gas storage chamber according to claim 7, characterized in that: A buttress is provided in the annular chamber (1), the buttress is located at the bottom of the gas inlet and outlet pipeline (4), and the buttress is fixedly connected to the curved pipeline.

Images