CN219865161U - Double-film sealing structure of underground rock cavern gas storage - Google Patents
Double-film sealing structure of underground rock cavern gas storage Download PDFInfo
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- CN219865161U CN219865161U CN202321279309.XU CN202321279309U CN219865161U CN 219865161 U CN219865161 U CN 219865161U CN 202321279309 U CN202321279309 U CN 202321279309U CN 219865161 U CN219865161 U CN 219865161U
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- 239000011435 rock Substances 0.000 title claims abstract description 43
- 238000007789 sealing Methods 0.000 title claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 108
- 239000007924 injection Substances 0.000 claims abstract description 108
- 239000012528 membrane Substances 0.000 claims description 21
- 239000002033 PVDF binder Substances 0.000 claims description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Landscapes
- Lining And Supports For Tunnels (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Tents Or Canopies (AREA)
Abstract
The utility model discloses a double-film sealing structure of an underground rock cavern gas storage, which comprises a waterproof layer, a lining layer, an impermeable layer and a double-film structure which are arranged on a surrounding rock body and are sequentially arranged from inside to outside, wherein the double-film structure comprises an inner air film and an outer air film which are sequentially arranged from inside to outside, the outer air film is positioned between the inner air film and the impermeable layer, and a cavity is arranged in the inner air film; the gas injection device comprises an outer gas film, a first gas injection pipe, a first pressure gauge, a second gas injection valve and a second pressure gauge, wherein the outer gas film is provided with the first gas injection pipe and the first gas exhaust pipe; the first exhaust pipe is provided with a first exhaust valve, and the second exhaust pipe is provided with a second exhaust valve. The utility model has reasonable design, the waterproof layer, the lining layer and the double-film structure are arranged on the inner side wall of the surrounding rock of the underground rock cavern, and damage and leakage are reduced in the circulating work of gas injection and gas release of the cavity of the double-film structure, so that the durability and the safety of the double-film sealing structure are improved.
Description
Technical Field
The utility model belongs to the technical field of compressed air energy storage, and particularly relates to a double-membrane sealing structure of an underground rock cavern gas storage.
Background
The safety and stability of compressed air energy storage during operation has been a concern. For example, chinese patent CN115324647A discloses a composite lining sealing structure of underground rock cavern gas storage and a construction method thereof, wherein epoxy resin is used as a sealing layer; chinese patent CN106499937B discloses a water seal double-layer constant pressure gas storage system for compressed air energy storage, which adopts liquid seal technology for sealing.
However, in the running process of the compressed air energy storage structure, high pressure, high temperature, instability and other factors caused by gas injection can greatly influence the sealing layer of the cavity of the underground rock cavern gas storage, so that the sealing layer in the cavity is extruded under the action of high pressure, and the high temperature generated by gas injection can also have a certain influence on the durability of the sealing layer of the cavity; the pressure in the cavity is rapidly reduced due to deflation, so that the cavity is easy to induce phenomena of cracking of the sealing layer, separation of the sealing layer, peeling of the sealing layer and the like under the action of pressure reduction, and the phenomena of cavity gas leakage, sealing layer failure, economic loss, serious unsafe accidents and the like are caused.
Disclosure of Invention
The utility model aims to solve the technical problems in the prior art, and provides the double-membrane sealing structure of the underground rock cavern gas storage, which has the advantages of simple structure and reasonable design, and is used for arranging the double-membrane structure in the surrounding rock body of the underground rock cavern so as to reduce damage and leakage of the double-membrane structure in the gas injection and gas release circulation process of the cavity of the double-membrane structure, thereby improving the durability and the safety of the double-membrane sealing structure.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides an underground rock cavern gas storage double-film seal structure which characterized in that: the double-film structure comprises an inner air film and an outer air film, wherein the outer air film is positioned between the inner air film and the impermeable layer, and a cavity is arranged in the inner air film;
the gas injection device comprises an outer gas film, a gas injection valve, a first pressure gauge, a second gas injection valve, a second pressure gauge and a gas injection pipe, wherein the outer gas film is provided with the first gas injection pipe and the first gas exhaust pipe, the inner gas film is provided with the second gas injection pipe and the second gas exhaust pipe, the first gas injection pipe is provided with the first gas injection valve and the first pressure gauge, and the second gas injection pipe is provided with the second gas injection valve and the second pressure gauge;
the first exhaust pipe is provided with a first exhaust valve, and the second exhaust pipe is provided with a second exhaust valve.
Foretell a secret rock cavern gas storage double-film seal structure, its characterized in that: the outlet of the second gas injection pipe is communicated with the cavity, the second gas injection pipe penetrates through the first gas injection pipe on the external gas film, the second gas injection pipe and the first gas injection pipe are coaxially arranged, the inlet of the second gas injection pipe is positioned outside the first gas injection pipe, an extension gas injection pipe is arranged on the first gas injection pipe, and the first gas injection valve and the first pressure gauge are positioned on the extension gas injection pipe;
the second gas injection valve and the second pressure gauge are positioned on the extending end of the second gas injection pipe, and the top end of the first gas injection pipe is sealed with the outer side wall of the second gas injection pipe.
Foretell a secret rock cavern gas storage double-film seal structure, its characterized in that: the second exhaust pipe passes through the first exhaust pipe on the external air film, the second exhaust pipe and the first air injection pipe are coaxially arranged, and the second exhaust valve is positioned at the end part of the second exhaust pipe extending out of the first exhaust pipe;
and the first exhaust valve is used for sealing or opening a channel between the inner side wall of the first exhaust pipe and the outer side wall of the second exhaust pipe.
Foretell a secret rock cavern gas storage double-film seal structure, its characterized in that: the bottom of the outer air film is provided with a connecting rod which extends into the bottom of the surrounding rock body and is embedded into the lining layer;
the inner air film and the outer air film are fireproof and antistatic PVDF films.
Compared with the prior art, the utility model has the following advantages:
1. the utility model has simple structure and reasonable design, only changes the inner cavity pressure of the double-membrane structure under the condition of gas injection and gas release, avoids the inner cavity pressure change from directly acting on the inner side wall sealing layer of the rock cavity surrounding rock body, and further avoids the weakening of the structural change stability of the inner side wall sealing layer, namely the waterproof layer, the lining layer and the impermeable layer.
2. According to the utility model, the lining layer and the impermeable layer are arranged, so that the inner wall of the surrounding rock body is fixed and impermeable, and the deformation of the inner wall of the surrounding rock body caused by the stress change of the surrounding rock body is reduced, thereby affecting the double-film structure.
3. The double-film structure is adopted for sealing, so that the double-film structure not only can adapt to the shape of the inner side wall of the surrounding rock, but also can ensure the integrity of the double-film structure, and the inner air film effectively reduces the leakage rate of gas in the cavity under the protection of the outer air film, and improves the volume rate of compressed air energy storage in the cavity, thereby increasing the utilization rate of the cavity; in addition, the service life of the gas storage can be prolonged, and the running cost is reduced.
4. The utility model sets the second pressure gauge and the first pressure gauge, monitors the pressure conditions of the inner cavity and the outer cavity in real time, and ensures the safety.
In conclusion, the double-membrane sealing structure is simple in structure and reasonable in design, and the double-membrane structure is arranged in the surrounding rock body of the underground rock cavern, so that damage and leakage of the double-membrane structure are reduced in the circulating process of gas injection and gas release of the cavity of the double-membrane structure, and the durability and safety of the double-membrane sealing structure are improved.
The technical scheme of the utility model is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Reference numerals illustrate:
1-surrounding rock mass; 2-a waterproof layer; 3-lining a layer;
4-an impermeable layer; 5-an external air film; 5-1 to a second gas injection pipe;
5-2, a second gas injection valve; 5-3-a second exhaust pipe; 5-4-a second exhaust valve;
6-an inner air film; 6-1, a first gas injection pipe; 6-2, a first gas injection valve;
6-3, a first exhaust pipe; 6-4, a first exhaust valve;
7-a first pressure gauge; 8-a second pressure gauge; 9-a connecting rod;
11-a cavity; 12-extending the gas injection pipe.
Detailed Description
The double-film sealing structure of the underground rock cavern gas storage comprises a waterproof layer 2, a lining layer 3, a impervious layer 4 and a double-film structure which are arranged on a surrounding rock body 1 and are sequentially distributed from inside to outside, wherein the double-film structure comprises an inner air film 6 and an outer air film 5, the outer air film 5 is positioned between the inner air film 6 and the impervious layer 4, and a cavity 11 is arranged in the inner air film 6;
the gas injection device is characterized in that a first gas injection pipe 6-1 and a first exhaust pipe 6-3 are arranged on the outer gas film 5, a second gas injection pipe 5-1 and a second exhaust pipe 5-3 are arranged on the inner gas film 6, a first gas injection valve 6-2 and a first pressure gauge 7 are arranged on the first gas injection pipe 6-1, and a second gas injection valve 5-2 and a second pressure gauge 8 are arranged on the second gas injection pipe 5-1;
the first exhaust pipe 6-3 is provided with a first exhaust valve 6-4, and the second exhaust pipe 5-3 is provided with a second exhaust valve 5-4.
In this embodiment, the outlet of the second gas injection pipe 5-1 is connected to the cavity 11, the second gas injection pipe 5-1 passes through the first gas injection pipe 6-1 on the external gas film 5, the second gas injection pipe 5-1 and the first gas injection pipe 6-1 are coaxially arranged, the inlet of the second gas injection pipe 5-1 is located outside the first gas injection pipe 6-1, an extended gas injection pipe 12 is arranged on the first gas injection pipe 6-1, and the first gas injection valve 6-2 and the first pressure gauge 7 are located on the extended gas injection pipe 12;
the second gas injection valve 5-2 and the second pressure gauge 8 are positioned on the extending end of the second gas injection pipe 5-1 and the first gas injection pipe 6-1, and the top end of the first gas injection pipe 6-1 is sealed with the outer side wall of the second gas injection pipe 5-1.
In this embodiment, the second exhaust pipe 5-3 passes through the first exhaust pipe 6-3 on the external air film 5, and the second exhaust pipe 5-3 and the first gas injection pipe 6-1 are coaxially arranged, and the second exhaust valve 5-4 is located at the end of the second exhaust pipe 5-3 extending out of the first exhaust pipe 6-3;
the top of the first exhaust pipe 6-3 is opened, and the first exhaust valve 6-4 is used for sealing or opening a channel between the inner side wall of the first exhaust pipe 6-3 and the outer side wall of the second exhaust pipe 5-3.
In this embodiment, a connecting rod 9 is disposed at the bottom of the outer air film 5, and the connecting rod 9 extends into the bottom of the surrounding rock body 1 and is embedded into the lining layer 3;
the inner air film 6 and the outer air film 5 are fireproof and antistatic PVDF films.
In this embodiment, in actual use, the waterproof layer 2 is a plain concrete waterproof layer or a cement waterproof layer, and the thickness of the waterproof layer 2 is 1.5 mm-2 mm;
the lining layer 3 is a reinforced concrete layer, the thickness of the lining layer 3 is 25 cm-30 cm, and the strength grade of concrete is C20.
In this embodiment, in actual use, construction is performed such that the surrounding rock grade of the surrounding rock body 1 is grade ii or more.
In this embodiment, in actual use, the impermeable layer 4 is an impermeable film, and the thickness is 2mm.
In this embodiment, during actual use, the dual-membrane structure may perform a single dual-membrane cavity or a plurality of dual-membrane cavities in parallel according to the underground rock cavern gas storage cavity structure or energy storage capacity requirement.
In the embodiment, when in actual use, the PVDF air film is adopted by the utility model in the inner and outer double-film structure, and the utility model has the advantages of large span, heat insulation, economy, rapidness, light dead weight and the like.
In the embodiment, during actual use, the second gas injection pipe 5-1 and the first gas injection pipe 6-1 are coaxially nested, the second gas exhaust pipe 5-3 and the first gas exhaust pipe 6-3 are coaxially nested, and the gas pipe layout space is reduced, so that the gas injection pipe is suitable for a narrow space of an opening of the surrounding rock body 1.
In the embodiment, in actual use, the dual-mode structure effectively blocks the conduction of the temperature and the pressure in the cavity 11 to the surrounding rock body 1.
In this embodiment, in practical use, the first exhaust valve 6-4 may refer to a valve structure for an annular channel of the CN219035595U patent, or other valves capable of achieving the same function.
In this embodiment, during actual use, the first gas injection pipe 6-1 and the first gas exhaust pipe 6-3, and the second gas injection pipe 5-1 and the second gas exhaust pipe 5-3 extend through the hole of the surrounding rock body 1, so that the operation is convenient.
In this embodiment, the pipeline is communicated with the cavity, so as to realize pressure detection.
When the utility model is specifically used, the second gas injection valve 5-2, the second gas exhaust valve 5-4 and the first gas exhaust valve 6-4 are operated to be closed, the compressor is communicated with the extended gas injection pipe 12, the first gas injection valve 6-2 is opened to inject gas between the inner gas film 6 and the outer gas film 5 until the outer cavity pressure detected by the first pressure gauge 7 meets the design requirement, and the first gas injection valve 6-2 is closed;
the second air injection valve 5-2 is operated to be opened, the second air exhaust valve 5-4 is opened, the first air injection valve 6-2 and the first air exhaust valve 6-4 are closed, compressed air is injected into the cavity 11 through the second air injection pipe 5-1, then the second air exhaust valve 5-4 is operated to be closed, the injection is continued until the pressure of the inner cavity detected by the second pressure gauge 8 meets the design requirement, the injection is stopped in the cavity 11, and the second air injection valve 5-2 is closed. Then, when the first pressure gauge 7 detects that the external cavity pressure between the internal air film 6 and the external air film 5 is larger than the design requirement, the first exhaust valve 6-4 is operated to be opened until the external cavity pressure meets the design requirement; when the second pressure gauge 8 detects that the pressure of the inner cavity in the cavity 11 is larger than the set pressure value of the inner cavity, the second exhaust valve 5-4 is operated to be opened until the pressure of the inner cavity meets the design requirement.
When the air needs to be discharged, the second air injection valve 5-2, the first air injection valve 6-2 and the first air discharge valve 6-4 are operated to be closed, the second air discharge valve 5-4 is opened, compressed air in the cavity 11 is discharged through the second air discharge valve 5-4, the second air discharge valve 5-4 is operated to be closed, and the air discharge is finished; and repeating the above gas injection.
In conclusion, the utility model has simple structure and reasonable design, the waterproof layer, the lining layer and the double-membrane structure are arranged on the inner side wall of the surrounding rock of the underground rock cavern, and damage is reduced in the circulating work of gas injection and gas release of the cavity of the double-membrane structure, so that the durability and the safety of the double-membrane sealing structure are improved.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims (4)
1. The utility model provides an underground rock cavern gas storage double-film seal structure which characterized in that: the waterproof layer (2), the lining layer (3), the impermeable layer (4) and the double-film structure are sequentially arranged on the surrounding rock body (1) from inside to outside, the double-film structure comprises an inner air film (6) and an outer air film (5), the outer air film (5) is positioned between the inner air film (6) and the impermeable layer (4), and a cavity (11) is arranged in the inner air film (6);
the gas injection device is characterized in that a first gas injection pipe (6-1) and a first gas exhaust pipe (6-3) are arranged on the outer gas film (5), a second gas injection pipe (5-1) and a second gas exhaust pipe (5-3) are arranged on the inner gas film (6), a first gas injection valve (6-2) and a first pressure gauge (7) are arranged on the first gas injection pipe (6-1), and a second gas injection valve (5-2) and a second pressure gauge (8) are arranged on the second gas injection pipe (5-1);
the first exhaust pipe (6-3) is provided with a first exhaust valve (6-4), and the second exhaust pipe (5-3) is provided with a second exhaust valve (5-4).
2. A double membrane seal structure for an underground rock cavern gas storage according to claim 1, wherein: the outlet of the second gas injection pipe (5-1) is communicated with the cavity (11), the second gas injection pipe (5-1) penetrates through the first gas injection pipe (6-1) on the external gas film (5), the second gas injection pipe (5-1) and the first gas injection pipe (6-1) are coaxially arranged, the inlet of the second gas injection pipe (5-1) is positioned outside the first gas injection pipe (6-1), an extension gas injection pipe (12) is arranged on the first gas injection pipe (6-1), and the first gas injection valve (6-2) and the first pressure gauge (7) are positioned on the extension gas injection pipe (12);
the second gas injection valve (5-2) and the second pressure gauge (8) are positioned on the extending end of the second gas injection pipe (5-1) positioned on the extending end of the first gas injection pipe (6-1), and the top end of the first gas injection pipe (6-1) is sealed with the outer side wall of the second gas injection pipe (5-1).
3. A double membrane seal structure for an underground rock cavern gas storage according to claim 1, wherein: the second exhaust pipe (5-3) passes through the first exhaust pipe (6-3) on the external air film (5), the second exhaust pipe (5-3) and the first gas injection pipe (6-1) are coaxially arranged, and the second exhaust valve (5-4) is positioned at the end part of the second exhaust pipe (5-3) extending out of the first exhaust pipe (6-3);
the top of the first exhaust pipe (6-3) is provided with an opening, and the first exhaust valve (6-4) is used for sealing or opening a channel between the inner side wall of the first exhaust pipe (6-3) and the outer side wall of the second exhaust pipe (5-3).
4. A double membrane seal structure for an underground rock cavern gas storage according to claim 1, wherein: the bottom of the outer air film (5) is provided with a connecting rod (9), and the connecting rod (9) stretches into the bottom of the surrounding rock body (1) and is embedded into the lining layer (3);
the inner air film (6) and the outer air film (5) are fireproof and antistatic PVDF films.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321279309.XU CN219865161U (en) | 2023-05-24 | 2023-05-24 | Double-film sealing structure of underground rock cavern gas storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321279309.XU CN219865161U (en) | 2023-05-24 | 2023-05-24 | Double-film sealing structure of underground rock cavern gas storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219865161U true CN219865161U (en) | 2023-10-20 |
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ID=88345263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321279309.XU Active CN219865161U (en) | 2023-05-24 | 2023-05-24 | Double-film sealing structure of underground rock cavern gas storage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219865161U (en) |
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2023
- 2023-05-24 CN CN202321279309.XU patent/CN219865161U/en active Active
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