Tunnel type underground chamber with breathing gas storage film

Abstract

The utility model provides a tunnel type underground chamber with a breathing gas storage film, which comprises an embedded part, a gas storage film and a gas storage film, a cavity is formed in the embedded part, a working cavity is formed in the embedded part, a channel is arranged on the side wall of the working cavity, and the channel is communicated with an underground tunnel; the sealing door assembly is arranged on the channel and used for blocking communication between the working cavity and the channel; the gas storage film is arranged in the working cavity, a gas storage cavity is formed in the gas storage film, and a compression cavity is formed between the inner wall of the working cavity and the outer wall of the gas storage film; the first pipe body is communicated with the gas storage cavity and is used for inputting or outputting medium gas in the gas storage cavity; and the second pipe body is communicated with the compression cavity and is used for inputting or outputting air in the compression cavity and enabling the air storage cavity to be compressed or expanded. The tunnel type underground chamber with the breathing gas storage film is compact in structure, high in strength, reliable and stable to use, high in safety, capable of adjusting output pressure, good in using effect, energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model relates to a gas storage device, in particular to a tunnel-type underground chamber with a breathing gas storage membrane. Background Technique

[0002] Carbon dioxide energy storage (CES) technology is a new type of physical energy storage technology based on compressed air energy storage (CAES) and Brayton power generation cycle. The energy storage duration can exceed 16 hours, and the energy release power can reach the GW level. It has the advantages of large energy storage density, long operation life, and compact system equipment. It is suitable for large-scale long-term energy storage and has good development and application prospects. In the application of existing technologies, during the low electricity price period, normal-pressure gaseous carbon dioxide is converted into high-pressure liquid carbon dioxide through a multi-stage compressor, and electrical energy is stored in the form of the internal energy of carbon dioxide; during the high electricity consumption period, high-pressure liquid carbon dioxide is expanded into normal-pressure gaseous carbon dioxide through a multi-stage expander for power generation, ultimately realizing the storage and release of electrical energy. In current technologies, there are mainly the following three storage methods for the gas storage end of compressed air energy storage and carbon dioxide energy storage: 1. Underground cave gas storage: Using natural caves underground, such as salt caverns, depleted oil and gas wells, or newly built gas storage wells, etc., as places to store high-pressure carbon dioxide. However, suitable natural caves are not available everywhere, and there are certain restrictions in site selection; the influence of alternating stress on the cave wall during gas charging and discharging may cause collapse over time. 2. Artificial chamber gas storage: It is composed of a concrete lining and a sealing layer in cooperation with the surrounding rock. However, this solution is only applicable to areas with many hard rock types and extensive underlying distributions, and the site selection of the facilities is relatively demanding; moreover, the supporting facilities for carbon dioxide energy storage must be built near the artificial chamber. Therefore, when selecting the site of the artificial chamber, it is necessary to consider that there is enough flat ground for building a factory nearby or the condition of land leveling, which increases the difficulty of site selection of the artificial chamber to a certain extent. 3. High-pressure metal tank gas storage: Build a large high-pressure metal container and store high-pressure carbon dioxide in it. This solution has no requirements for the construction location and only requires a site to be provided. However, the construction cost of the high-pressure container is too high, and a metal container with a thickness of usually 50 - 80 mm is required. Content of the Utility Model

[0003] Technical Problem to be Solved

[0004] The technical problem to be solved by the utility model is to provide a tunnel-type underground chamber with a breathing gas storage membrane that is structurally compact, can avoid displacement due to stress, has high structural strength, and good sealing and gas storage effects.

[0005] Technical Solution for Solving the Problem

[0006] The utility model provides a tunnel-type underground chamber with a breathing gas storage membrane, including:

[0007] The embedded part 1, as the main body, is buried underground. A chamber is formed inside the embedded part 1 to form a working chamber 110. A channel 120 is provided on the side wall of the working chamber 110, and the channel 120 communicates with the underground tunnel 90;

[0008] The sealing door assembly 4 is arranged on the channel 120 for blocking the communication between the working chamber 110 and the channel 120 and making the working chamber 110 form a sealed chamber;

[0009] The gas storage membrane 2 is arranged in the working chamber 110. A gas storage cavity 20 is formed inside the gas storage membrane 2, and a compression cavity is formed between the inner wall of the working chamber 110 and the outer wall of the gas storage membrane 2;

[0010] The first pipe body 31 communicates with the gas storage cavity 20 and is used for the input or output of the medium gas in the gas storage cavity 20;

[0011] The second pipe body 32 communicates with the compression cavity and is used for the input or output of the air in the compression cavity and making the gas storage cavity 20 compressed or expanded.

[0012] Furthermore, the embedded part 1 is a horizontally arranged cylinder.

[0013] Furthermore, an annular protrusion 13 is provided on the side wall of the embedded part 1. The annular protrusion 13 has a first stop surface 13a inclined forward and a second stop surface 13b inclined backward.

[0014] Furthermore, the angle between the first stop surface 13a and the axis of the embedded part 1 is smaller than the angle between the second stop surface 13b and the axis of the embedded part 1.

[0015] Furthermore, the angle between the first stop surface 13a and the axis of the embedded part 1 is greater than or equal to 25° and less than or equal to 35°; the angle between the second stop surface 13b and the axis of the embedded part 1 is greater than or equal to 55° and less than or equal to 65°.

[0016] Furthermore, the embedded part 1 includes a first cylinder 11 and a second cylinder 12 arranged coaxially, and the diameter of the second cylinder 12 is smaller than the diameter of the first cylinder 11. The working chamber 110 is arranged inside the first cylinder 11, the channel 120 is arranged on the second cylinder 12, and the annular protrusion 13 is arranged between the first cylinder 11 and the second cylinder 12.

[0017] Furthermore, the medium gas in the gas storage cavity 20 is carbon dioxide.

[0018] Further, an air turbine generator is provided at the external air outlet end of the second pipe body 32 for generating electricity when the compression chamber discharges air.

[0019] Further, the sealing door assembly 4 includes a sealing door 41, a fixed flange 42, a lead screw 44 and a driving motor 43. The fixed flange 42 is fixed in the channel 120. The lead screw 44 is threadedly connected to the fixed flange 42 and its axis is parallel to the length direction of the channel 120. The sealing door 41 is horizontally slidably fitted in the working chamber and is hinged to the end of the lead screw 44. The output end of the driving motor 43 is connected to the lead screw 44 and is used to drive the lead screw 44 to rotate, thereby driving the sealing door 41 to move axially to open or close.

[0020] Further, the sealing door 41 is an arc-shaped structure convex inward, and an inspection door 412 that can be opened inward for maintenance is provided on the sealing door 41.

[0021] Beneficial effects

[0022] The tunnel-type underground chamber with a breathing air storage membrane of the present utility model ensures good stability underground through a special external shape structure, and introduces the hanging rail translation type head of the existing vacuum freeze-drying equipment to achieve convenient maintenance; combined with the relatively mature existing tunnel excavation technology, tunnels are excavated underground, and a steel-concrete cast underground air storage chamber system in the form of convex ears on the outside is formed. The convex ears can prevent the air storage chamber from displacing underground due to stress with the rock, ensuring its stability, while protecting the structure of the surrounding rock and enhancing its own compressive strength; a large metal hanging rail type translation head is used as the sealing door, and the sealing door is provided with a sealing ring. The head and the motor are connected by a lead screw, and the lead screw is fixed by a fixed flange, and the sealing door is initially locked by the motor; when gas is introduced into the air storage chamber, the sealing door is pressed tightly by the pressure generated by the high-pressure gas. The greater the pressure, the better the sealing effect; a manhole inspection opening is provided on the sealing door, and the inspection opening flange door is initially fixed by bolts, and the manhole inspection opening is also pressed by the gas pressure in the air storage chamber, greatly reducing the sealing difficulty and the maintenance difficulty; a breathing air storage membrane is built-in, and the air membrane is mainly used to isolate air and CO2, and the air membrane is contracted or expanded by controlling the air pressure in the compression chamber to finally obtain a stable CO2 output pressure; at the same time, the release process of the air in the tank can also be connected to a generator to convert internal energy into electrical energy to achieve the purpose of energy conservation and emission reduction; the tunnel-type underground chamber with a breathing air storage membrane of the present utility model has a compact structure, high strength, reliable and stable use, high safety, can adjust the output pressure, has good use effect, and is energy-saving and environment-friendly. Description of the drawings

[0023] Figure 1 It is a schematic structural diagram of the tunnel-type underground chamber with a breathing air storage membrane of the present utility model;

[0024] Figure 2 This is a schematic structural view of the embedded part of the tunnel-type underground chamber with a breathing air storage membrane of the present utility model;

[0025] Figure 3 is Figure 2 the enlarged view of part A in Specific embodiments

[0026] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0027] Referring to Figures 1-3 , the present utility model provides a tunnel-type underground chamber with a breathing air storage membrane, which includes an embedded part 1, a sealing door assembly 4, an air storage membrane 2, a first pipe body 31 and a second pipe body 32.

[0028] The embedded part 1 serves as the main body and is buried underground. It is made of reinforced concrete. A chamber is formed inside the embedded part 1, which forms the working chamber 110. The cross-section of this working chamber is circular. A channel 120 is provided on the side wall of the working chamber 110. This channel 120 is horizontally arranged and communicates with the underground tunnel 90. The underground tunnel 90 can allow workers to enter and exit, and thus the casting of the embedded part, the installation of components, and the inspection and maintenance, etc. can be carried out; in this embodiment, the embedded part 1 is a horizontally arranged cylinder. A circular protrusion 13 is provided on the side wall of the embedded part 1. This circular protrusion 13 is centered on the axis of the embedded part 1. The cross-section of this circular protrusion 13 is triangular, and it has a first stop surface 13a inclined forward and a second stop surface 13b inclined backward. In this embodiment, taking the direction of the underground tunnel as the front and the working chamber 110 as the rear, that is, the inlet direction is the front, the first stop surface 13a faces the inlet end, and the second stop surface 13b faces away from the inlet end. By setting the above structure, the stress between the embedded part and the rock can prevent the embedded part from shifting underground due to force, ensuring its stability, and at the same time protecting the structure of the surrounding rock and enhancing its own compressive strength; at the same time, the angle between the first stop surface 13a and the axis of the embedded part 1 is smaller than the angle between the second stop surface 13b and the axis of the embedded part 1. Specifically, the angle between the first stop surface 13a and the axis of the embedded part 1 is greater than or equal to 25° and less than or equal to 35°; the angle between the second stop surface 13b and the axis of the embedded part 1 is greater than or equal to 55° and less than or equal to 65°; in order to further improve the overall reliability and stability, in this application, the embedded part 1 includes a first cylinder 11 and a second cylinder 12 arranged coaxially. The diameter of the second cylinder 12 is smaller than the diameter of the first cylinder 11. The working chamber 110 is arranged inside the first cylinder 11, and the channel 120 is arranged on the second cylinder 12. Specifically, the channel runs through both ends of the second cylinder, and this channel is located at the center of the second cylinder, that is, the channel 120 is coaxial with the second cylinder 12. One end of the channel communicates with the working chamber 110, and the other end communicates with the underground tunnel 90. And the circular protrusion 13 is arranged between the first cylinder 11 and the second cylinder 12. Through the above structure, the reliability and stability of the embedded part underground can be greatly improved, displacement can be avoided, and the overall structure has high strength and strong compressive capacity.

[0029] This application uses the existing tunnel excavation technology to form a tunnel underground, and forms an integrated embedded part (working chamber) through steel-concrete casting. The embedded part is tightly connected to the underground rock layer through its external shape structure, ensuring its position stability and bearing capacity.

[0030] The sealing door assembly 4 is arranged on the channel 120 to block the communication between the working chamber 110 and the channel 120, so as to form a sealed chamber in the working chamber 110; the gas storage film 2 is arranged in the working chamber 110, and a sealed chamber is arranged in the gas storage film 2 to form a gas storage chamber 20 for storing the medium gas. In this application, the medium gas is carbon dioxide. A sealed chamber is also formed between the inner wall of the working chamber 110 and the outer wall of the gas storage film 2, which serves as a compression chamber.

[0031] The first pipe body 31 is communicated with the gas storage chamber 20 for the input or output of the medium gas in the gas storage chamber 20. Specifically, the first pipe body 31 enters the gas storage chamber 20 of the embedded part from the underground tunnel, and the other end extends to the ground and is connected to the gas storage system for inputting carbon dioxide into the gas storage chamber 20 or discharging it from the gas storage chamber 20; in this application, the first pipe body includes a first pipe body I and a second pipe body II, which are respectively used for the intake and exhaust of the gas storage chamber 20; the second pipe body 32 is communicated with the compression chamber for the input or output of the air in the compression chamber, so as to form a certain pressure on the gas storage film 2. When the pressure in the compression chamber is greater than that in the gas storage chamber 20, the gas storage chamber is compressed. When the pressure in the compression chamber is less than that in the gas storage chamber 20, the gas storage chamber 20 expands. It is used to control the output pressure of the gas storage chamber; in this application, the second pipe body includes a second pipe body I and a second pipe body II, which are respectively used for the intake and outlet of the compression chamber.

[0032] In order to improve the energy utilization rate, in this application, an air turbine generator is arranged at the external (ground) outlet end of the second pipe body 32. When the compression chamber exhausts, the discharged high-pressure air enters the air turbine generator through the second pipe body 32 for power generation, avoiding direct loss when the compressed air is discharged, improving the overall energy utilization rate, and saving energy and protecting the environment.

[0033] The sealing door assembly 4 is used to seal the working chamber 110. It includes a sealing door 41, a fixed flange 42, a lead screw 44 and a driving motor 43. The fixed flange 42 is fixed in the channel 120. To improve the installation reliability of the fixed flange 42, an installation groove 121 is provided on the side wall of the channel 120. The two ends of the fixed flange 42 are respectively clamped in the installation groove 121 to prevent the fixed flange 42 from axially shifting. By setting the structure of the installation groove 121, the axial bearing capacity of the fixed flange 42 can be improved. In this embodiment, the fixed flange 42 is perpendicular to the axis of the channel. The lead screw 44 is threadedly connected to the fixed flange 42, and its axis is parallel to the length direction of the channel 120. By rotating the lead screw 44, it can move forward or backward axially. The sealing door 41 is located in the working chamber 110. It is slidably fitted in the working chamber 110 through a slide rail, and its sliding direction is parallel to the axis of the lead screw. Specifically, the slide rail is a suspended rail and there are multiple of them. They are arranged in the channel 120, which is convenient for installation and maintenance. At the same time, it avoids being arranged inside and affecting the air storage of the airbag. The slide rail is parallel to the lead screw. Therefore, the sliding direction of the sealing door is parallel to the axis of the lead screw. The end of the lead screw is hinged to the hinged sealing door 41, that is, rotatably connected. The output end of the driving motor 43 is connected to the lead screw 44 to drive the lead screw 44 to rotate, and then drive the sealing door 41 to move axially, so as to realize opening or closing. The above-mentioned sealing door 41 can only be opened inward. When it is closed, it can bear pressure and transfer the pressure to the embedded part.

[0034] Specifically, the sealing door 41 is an inwardly convex arc structure, similar to a hemispherical structure. Its size is larger than the diameter of the opening of the working chamber (the connection with the channel). Its edge forms a sealing surface for contacting the edge of the opening, that is, the inner wall of the working chamber, to achieve compression sealing. Therefore, a sealing ring is provided on the edge of the sealing door 41, which can fit the inner wall of the working chamber to achieve sealing. The sealing door is an inwardly convex arc structure. Therefore, it can bear a large pressure, has high structural strength, ensures the reliability and stability of the overall use, and has high use safety. An inspection door 412 is provided on the sealing door 41. The inspection door is used for inspection. It can be opened inward, has high structural strength and strong pressure-bearing capacity. When closed, it is fixed by bolts, which is convenient, fast and has high strength.

[0035] The utility model provides a tunnel-type underground chamber with a breathing gas storage membrane, which ensures good stability underground through a special shape structure, and introduces a hanging rail translational head of an existing vacuum freeze-drying equipment to facilitate maintenance; in combination with the existing relatively mature tunnel digging technology, a tunnel is dug underground, and an underground gas storage chamber system with a lug on the outside is formed by steel-concrete pouring; the lug can prevent the gas storage chamber from being displaced underground due to force through the stress between the lug and the rock, thereby ensuring its stability, while protecting the structure of the surrounding rocks and enhancing its own pressure resistance; a large metal hanging rail translational head is used as a sealing door, the sealing door has a sealing ring, the head and the motor are connected by a screw rod, the screw rod is fixed by a fixed flange, and the sealing door is initially locked by the motor; when gas is introduced into the gas storage chamber, the screw rod is fixed by a fixed flange, and the sealing door is initially locked by the motor; when gas is introduced into the gas storage chamber, the screw rod is fixed by a fixed flange, and the screw rod is fixed by a fixed flange. The pressure generated by the high-pressure gas will press the sealing door tightly, and the greater the pressure, the better the sealing effect; a manhole inspection port is provided on the sealing door, and the inspection port flange door is initially fixed by bolts, and the manhole inspection port is also tightened by the gas pressure in the gas storage chamber, which greatly reduces the difficulty of sealing and maintenance; a built-in breathing gas storage membrane, the gas membrane is mainly used to isolate air and CO2, and the air pressure in the compression chamber is controlled to shrink or expand the gas membrane, and finally a stable CO2 output pressure is obtained; at the same time, the release process of the air in the tank can also be connected to a generator, and the internal energy is converted into electrical energy, so as to achieve the purpose of energy saving and emission reduction; the utility model has a tunnel-type underground chamber with a breathing gas storage membrane, which has a compact structure, high strength, reliable and stable use, high safety, can adjust the output pressure, has a good use effect, and is energy-saving and environmentally friendly.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A tunnel-type underground chamber with a breathing gas storage membrane, characterized in that: include: The embedded part is used as a main body and buried underground. A chamber is formed in the embedded part to form a working chamber. A channel is provided on the side wall of the working chamber, and the channel is connected to the underground tunnel. A sealing door assembly, arranged on the passage, for blocking the communication between the working chamber and the passage and forming the working chamber into a sealed chamber; An air storage membrane is arranged in the working cavity, an air storage cavity is formed in the air storage membrane, and a compression cavity is formed between the inner wall of the working cavity and the outer wall of the air storage membrane; A first tube body, connected to the gas storage cavity, and used for inputting or outputting the medium gas in the gas storage cavity; The second tube body is communicated with the compression chamber and is used for inputting or outputting the air in the compression chamber and compressing or expanding the air storage chamber.

2. The tunnel-type underground chamber with a breathing gas storage membrane as claimed in claim 1, characterized in that: The embedded part is in the shape of a horizontally arranged cylinder.

3. The tunnel-type underground chamber with a breathing gas storage membrane as claimed in claim 2, characterized in that: The side wall of the embedded part is provided with an annular protrusion, and the annular protrusion has a first stop surface arranged obliquely toward the front and a second stop surface arranged obliquely toward the rear.

4. The tunnel-type underground chamber with a breathing gas storage membrane as claimed in claim 3, characterized in that: An angle between the first stop surface and the axis of the embedded component is smaller than an angle between the second stop surface and the axis of the embedded component.

5. The tunnel-type underground chamber with a breathing gas storage membrane as claimed in claim 3, characterized in that: The angle between the first stop surface and the axis of the embedded part is greater than or equal to 25 degrees and less than or equal to 35 degrees; the angle between the second stop surface and the axis of the embedded part is greater than or equal to 55 degrees and less than or equal to 65 degrees.

6. The tunnel-type underground chamber with a breathing gas storage membrane as claimed in claim 3, characterized in that: The embedded part includes a first cylinder and a second cylinder which are coaxially arranged, and the diameter of the second cylinder is smaller than the diameter of the first cylinder. The working chamber is arranged in the first cylinder, the channel is arranged on the second cylinder, and the annular protrusion is arranged between the first cylinder and the second cylinder.

7. The tunnel-type underground chamber with a breathing gas storage membrane as claimed in claim 1, characterized in that: The medium gas in the gas storage cavity is carbon dioxide.

8. The tunnel-type underground chamber with a breathing gas storage membrane as claimed in claim 1, characterized in that: An air turbine generator is provided at the external air outlet end of the second tube body for generating electricity when the compression chamber is exhausted.

9. The tunnel-type underground chamber with a breathing gas storage membrane as claimed in claim 1, characterized in that: The sealing door assembly includes a sealing door, a fixed flange, a screw and a driving motor. The fixed flange is fixed in the channel. The screw is threadedly connected to the fixed flange, and its axis is parallel to the length direction of the channel. The sealing door is horizontally slidable in the working chamber and is hinged to the end of the screw. The output end of the driving motor is connected to the screw and is used to drive the screw to rotate, thereby driving the sealing door to move axially and open or close.

10. The tunnel-type underground chamber with a breathing gas storage membrane as claimed in claim 9, characterized in that: The sealing door is an inwardly convex arc structure, and is provided with an inspection door which can be opened inwardly for inspection.

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