阅读说明：本技术 整体式橡胶囊密封的压气储能内衬洞室 (Air compression energy storage lining cavity sealed by integral rubber bag ) 是由 夏才初 秦世康 杜时贵 徐晨 徐英俊 王辰霖 于 2021-06-16 设计创作，主要内容包括：本发明公开了一种整体式橡胶囊密封的压气储能内衬洞室,包括压气储能内衬洞室、整体式橡胶囊和排水沟,压气储能内衬洞室开挖在完整性较好的围岩中,整体式橡胶囊设置在压气储能内衬洞室内,排水沟开挖在压气储能内衬洞室的底部,整体式橡胶囊用于压气储能内衬洞室的密封,其充气膨胀时密贴于压气储能内衬洞室的衬砌壁面；充气过程中,整体式橡胶囊紧贴压气储能内衬洞室的衬砌壁面,对压气储能内衬洞室进行密封；放气过程中,整体式橡胶囊与压气储能内衬洞室的衬砌壁面脱离,渗透进入压气储能内衬洞室的地下水则通过排水沟排出洞外。相比于现有的压气储能内衬洞室,本发明压气储能内衬洞室适用范围更广、可行性更好、泄漏率更小、风险和成本更低。(The invention discloses an integral rubber bag sealed air compression energy storage lining cavern, which comprises an air compression energy storage lining cavern, an integral rubber bag and a drainage ditch, wherein the air compression energy storage lining cavern is excavated in surrounding rock with better integrity; in the inflation process, the integral rubber bag is tightly attached to the lining wall surface of the compressed air energy storage lining cavern to seal the compressed air energy storage lining cavern; during the deflation process, the integral rubber bag is separated from the lining wall surface of the compressed air energy storage lining cavern, and the underground water permeating into the compressed air energy storage lining cavern is discharged out of the cavern through the drainage ditch. Compared with the existing air compression energy storage lining cavern, the air compression energy storage lining cavern has the advantages of wider application range, better feasibility, smaller leakage rate, lower risk and lower cost.)

1. The compressed air energy storage lining cavern sealed by the integral rubber bag is characterized by comprising the compressed air energy storage lining cavern, the integral rubber bag and a drainage ditch, wherein the compressed air energy storage lining cavern is excavated in surrounding rocks with better integrity, the integral rubber bag is arranged in the compressed air energy storage lining cavern, the drainage ditch is excavated at the bottom of the compressed air energy storage lining cavern, the integral rubber bag is used for sealing the compressed air energy storage lining cavern, and the integral rubber bag is closely attached to the lining wall surface of the compressed air energy storage lining cavern when inflated and expanded; in the inflation process, the integral rubber bag is tightly attached to the lining wall surface of the compressed air energy storage lining cavern, the internal pressure is transmitted to the surrounding rock, and the internal and external pressures of the integral rubber bag are balanced by the reaction of the surrounding rock body to seal the compressed air energy storage lining cavern; in the air discharging process, the integral rubber bag is separated from the lining wall surface of the air compression energy storage lining cavity, a released space is provided for the water head pressure accumulated between the integral rubber bag and the lining wall surface of the air compression energy storage lining cavity, and the underground water permeating into the air compression energy storage lining cavity is discharged out of the cavity through the drainage ditch.

2. The cavern with compressed air and energy storage lining sealed by the integral rubber bag as claimed in claim 1, wherein the integral rubber bag is formed by vulcanizing and connecting segmented rubber bags through a welding machine on a construction site of the cavern with compressed air and energy storage lining.

3. The cavern of claim 1, wherein the shape of the integral rubber bladder during inflation is the same as the shape of the cavern of the energy storage, and the outer diameter of the integral rubber bladder during inflation is the same as the inner diameter of the cavern of the energy storage.

4. The internal lining cavern sealed by the integral rubber bag as claimed in any one of claims 1 to 3, wherein the internal lining cavern is lined with a poured reinforced concrete layer, the axial two ends of the internal lining cavern are respectively provided with a head base and a tail base, the head base and the tail base are respectively poured by reinforced concrete, the internal lining cavern, the head base and the tail base enclose an accommodating cavity, the integral rubber bag is positioned in the accommodating cavity, the head of the integral rubber bag is communicated with one end of an air inlet pipeline and one end of an air outlet pipeline, the air inlet pipeline and the air outlet pipeline are respectively provided with an air inlet valve and an air outlet valve, and the other end of the air inlet pipeline is connected with an air compressor, the other end of the air outlet pipeline is connected with a generator set, and the air compressor and the generator set are respectively connected with a power grid.

5. The integral rubber bag sealed air compressing energy storage lining cavern as claimed in claim 4, wherein a plurality of hanging buckles are fixed on the reinforced concrete layer, the hanging buckles are divided into two rows and arranged along the axial direction of the air compressing energy storage lining cavern at intervals, each hanging buckle is arranged at a position above the half height of the air compressing energy storage lining cavern, a plurality of hanging straps are fixed on the outer wall of the integral rubber bag, the hanging straps are divided into two rows and arranged along the axial direction of the air compressing energy storage lining cavern at intervals, each hanging strap is arranged at a position above the half height of the integral rubber bag, and each hanging strap is connected with one hanging buckle.

6. The integral rubber bag sealed puffer energy storage lining cavern of claim 5, wherein each of the suspension buckles is fixed to the reinforced concrete layer by a cement nail with a gasket.

7. The air compressing energy storage lining cavern sealed by the integral rubber bag as claimed in claim 4, wherein a geotextile layer is laid on the inner wall of the reinforced concrete layer, and the geotextile layer is fixed on the inner wall of the reinforced concrete layer through a plurality of cement nails.

8. The cavern with compressed air and energy storage lining sealed by the integral rubber bag as claimed in claim 7, wherein a gasket is compressed between each cement nail and the geotextile layer.

Technical Field

The invention relates to the technical field of underground energy storage for realizing double targets of carbon peak reaching and carbon neutralization, in particular to an integral rubber bag sealed air compression energy storage lining cavern.

Background

The primary measures for realizing the carbon peak-reaching target are to reduce the use of fossil energy and increase the utilization of green renewable energy sources such as wind power, photovoltaic power and the like. Wind power, photovoltaic power and other green renewable energy sources are more environment-friendly than traditional fossil energy sources, but the stability and the continuity of power generation are relatively insufficient due to the intermittency and the volatility. In order to solve the above problems, a large-scale energy storage technology is needed, and compressed air energy storage is a common large-scale energy storage technology. The compressed air energy storage technology takes high-pressure air as a medium to realize the storage and release of energy in a power grid, and intermittent energy sources such as wind power and photovoltaic power can be converted into stable and controllable high-quality energy sources through reasonable regulation and control of the energy storage and release. The underground cavern is used as a storage container of high-pressure air and plays an important role in the operation process of the compressed air energy storage power station, and the key problem of the construction of the underground cavern is the problem of the sealing property of the underground cavern.

The invention discloses an invention with application number 200810033803.1, 26.8.2009 and name 'a method for storing energy by utilizing compressed air in a mine', and discloses a method for storing energy by utilizing compressed air in an abandoned mine. The invention provides an idea for sealing the abandoned mine, but the underground cavern bears 5-10MPa of circulating high pressure in the compressed air energy storage operation process, and the method only depends on the air bag without applying any bearing structure to seal the abandoned mine, so that the feasibility is not great. The invention discloses an invention of application number 201410174203.2 and named as 'a construction method of an air compression energy storage cavern' which is published 9/3/2014, and discloses a construction method of an air compression energy storage cavern which uses steel fiber reinforced concrete as a lining and applies a high polymer material as a sealing layer inside.

Disclosure of Invention

In order to solve the problem of air compression energy storage cavern sealing and overcome the defects of the existing air compression energy storage cavern sealing method, the invention provides an integral rubber bag sealed air compression energy storage lining cavern which is wider in application range, better in feasibility, smaller in leakage rate, lower in risk and lower in cost.

The technical scheme adopted by the invention for solving the technical problems is as follows: the compressed air energy storage lining cavern sealed by the integral rubber bag comprises a compressed air energy storage lining cavern, the integral rubber bag and a drainage ditch, wherein the compressed air energy storage lining cavern is excavated in surrounding rock with better integrity, the integral rubber bag is arranged in the compressed air energy storage lining cavern, the drainage ditch is excavated at the bottom of the compressed air energy storage lining cavern, the integral rubber bag is used for sealing the compressed air energy storage lining cavern, and the integral rubber bag is closely attached to the lining wall surface of the compressed air energy storage lining cavern when inflated and expanded; in the inflation process, the integral rubber bag is tightly attached to the lining wall surface of the compressed air energy storage lining cavern, the internal pressure is transmitted to the surrounding rock, and the internal and external pressures of the integral rubber bag are balanced by the reaction of the surrounding rock body to seal the compressed air energy storage lining cavern; in the air discharging process, the integral rubber bag is separated from the lining wall surface of the air compression energy storage lining cavity, a released space is provided for the water head pressure accumulated between the integral rubber bag and the lining wall surface of the air compression energy storage lining cavity, and the underground water permeating into the air compression energy storage lining cavity is discharged out of the cavity through the drainage ditch.

Preferably, the integral rubber bag is formed by vulcanizing and connecting segmented rubber bags through a welding machine on the construction site of the compressed air energy storage lining cavern. In order to meet the requirements of height limitation and weight limitation in the transportation process, the rubber bag needs to be as light and thin as possible, and needs to be manufactured in sections, and the diameter can be determined according to the requirements of an engineering field. The integral rubber bag is manufactured by vulcanizing and connecting the rubber bags manufactured in sections through a welding machine on the construction site of the underground cavern, the manufacture is flexible and convenient, the requirement of the engineering site can be better met, and the integrity of the integral rubber bag and the sealing effect of the integral rubber bag on the compressed air energy storage lining cavern are ensured.

Preferably, the shape of the integral rubber bag during inflation is the same as that of the compressed air energy storage lining cavern, and the outer diameter of the integral rubber bag during inflation is equal to the inner diameter of the compressed air energy storage lining cavern, so that the integral rubber bag is prevented from being affected by the internal and external pressure difference during inflation.

Preferably, the lining of the air compressing energy storage lining cavern is a poured reinforced concrete layer, a head base and a tail base are respectively arranged at two axial ends of the air compressing energy storage lining cavern, the head base and the tail base are respectively formed by pouring reinforced concrete, the air compression energy storage lining cavity, the head base and the tail base enclose an accommodating cavity, the integral rubber bag is positioned in the accommodating cavity, the head of the integral rubber bag is communicated with one end of an air inlet pipeline and one end of an air outlet pipeline, the air inlet pipeline and the air outlet pipeline are respectively provided with an air inlet valve and an air outlet valve, the other end of the air inlet pipeline is connected with an air compressor, the other end of the air outlet pipeline is connected with a generator set, and the air compressor and the generator set are respectively connected with a power grid. The head base and the tail base are respectively formed by pouring reinforced concrete, the head base and the tail base are embedded into surrounding rock, so that the transverse deformation of the air compression energy storage lining cavity can be better limited, and a bearing structure is provided for the transverse deformation of the integral rubber bag in the air inflation process.

Preferably, a plurality of suspension buckles are fixed on the reinforced concrete layer, the suspension buckles are divided into two rows and are arranged at intervals along the axial direction of the air compression energy storage lining cavern, each suspension buckle is arranged at a position above the half height of the air compression energy storage lining cavern, a plurality of hanging strips are fixed on the outer wall of the integral rubber bag, the hanging strips are divided into two rows and are arranged at intervals along the axial direction of the air compression energy storage lining cavern, each hanging strip is arranged at a position above the half height of the integral rubber bag, and each hanging strip is connected with one suspension buckle. After the connection structure is adopted, the integral rubber bag is hung on the wall of the hole in a way that the integral rubber bag is arranged in place and less than the rear half of the integral rubber bag is hung in place, so that irregular movement and dead fold of the integral rubber bag can be reduced.

Preferably, each said suspension clasp is fixed to said reinforced concrete layer by a cement nail with a gasket. In the construction process, the sling sleeves the cement nails and is wedged into the reinforced concrete layer, so that the rubber bag is fixed. The head of the cement nail and the gasket are thin, and the integral rubber bag cannot be punctured by the bulge of the suspension buckle.

Preferably, a geotextile layer is laid on the inner wall of the reinforced concrete layer, and the geotextile layer is fixed on the inner wall of the reinforced concrete layer through a plurality of cement nails. The relatively soft geotechnical cloth layer can enable the inner surface of the accommodating cavity to be smoother, so that the integral rubber bag is more uniformly stressed after being inflated.

Preferably, a gasket is arranged between each cement nail and the geotextile layer in a compression mode. The gasket can protect the geotechnical cloth layer on the one hand, and on the other hand can avoid the cement nail to pierce through geotechnical cloth layer and lose effect.

Compared with the prior art, the invention has the following advantages:

1) the integral rubber bag adopted by the compressed air energy storage lining cavern is an integral body, has good sealing effect, and can avoid air leakage caused by hot melting connection of a sealing material, surrounding rock cracks and the like in the conventional compressed air energy storage lining cavern;

2) the integral rubber bag in the compressed air energy storage lining cavern can be separated from the inner wall of the compressed air energy storage lining cavern under the deflation working condition, so that a released space is provided for the water head pressure accumulated between the integral rubber bag and the inner wall of the compressed air energy storage lining cavern, and the risk that the integral rubber bag is torn by the water head pressure is avoided;

3) the air compression energy storage lining cavern has a simple structure, the air pressure inside the integral rubber bag can be balanced with the surrounding rock pressure outside after being inflated, only has a sealing effect and does not bear the force, so that the thickness of the rubber bag material does not need to be increased intentionally in the manufacturing process, the manufacturing cost is low, the implementation and the popularization are easy, and the economic benefit is high;

4) compared with the existing air compression energy storage lining cavern, the air compression energy storage lining cavern has the advantages of wider application range, better feasibility, lower leakage rate, lower risk and lower cost.

Drawings

FIG. 1 is a schematic structural view of a pressurized gas energy storage lining cavern in example 1;

FIG. 2 is a schematic cross-sectional view of the integral rubber bladder of example 1 when fully inflated;

FIG. 3 is a schematic cross-sectional view of the integral rubber bladder of example 1 collapsed after deflation;

fig. 4 is a schematic view showing a partial connection effect between the geotextile layer and the reinforced concrete layer in example 2;

in the figure: the method comprises the following steps of 1-surrounding rock, 2-reinforced concrete layer, 3-integral rubber bag, 4-head base, 5-tail base, 6-air inlet pipeline, 7-air outlet pipeline, 8-air pressure energy storage lining cavity, 9-accommodating cavity, 10-air compressor, 11-generator set, 12-power grid, 13-air inlet valve, 14-air outlet valve, 15-suspension buckle, 16-cement nail with gasket, 17-sling, 18-geotextile layer, 19-cement nail, 20-gasket and 21-drainage ditch.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The compressed air energy storage lining cavern sealed by the integral rubber bag in the embodiment 1 comprises a compressed air energy storage lining cavern 8, an integral rubber bag 3 and a drainage ditch 21, wherein the compressed air energy storage lining cavern 8 is excavated in surrounding rock 1 with good integrity, the integral rubber bag 3 is arranged in the compressed air energy storage lining cavern 8, the drainage ditch 21 is excavated at the bottom of the compressed air energy storage lining cavern 8, the integral rubber bag 3 is used for sealing the compressed air energy storage lining cavern 8, and the integral rubber bag 3 is tightly attached to the lining wall surface of the compressed air energy storage lining cavern 8 when being inflated and expanded; in the inflation process, the integral rubber bag 3 is tightly attached to the lining wall surface of the compressed air energy storage lining cavern 8, the internal pressure is transmitted to the surrounding rock 1, and the reaction of the surrounding rock 1 enables the internal pressure and the external pressure of the integral rubber bag 3 to be balanced to seal the compressed air energy storage lining cavern 8; in the deflation process, the integral rubber bag 3 is separated from the lining wall surface of the air compression energy storage lining cavern 8, a released space is provided for the water head pressure accumulated between the integral rubber bag 3 and the lining wall surface of the air compression energy storage lining cavern 8, and the underground water permeating into the air compression energy storage lining cavern 8 is discharged out of the cavern through the drainage ditch 21.

In the embodiment 1, the integral rubber bag 3 is formed by vulcanizing and connecting the rubber bags 3 which are manufactured in sections through a welding machine on the construction site of the air compression energy storage lining cavern 8; the shape of the integral rubber bag 3 when inflated is the same as that of the air compression energy storage lining cavern 8, and the outer diameter of the integral rubber bag 3 when inflated is equal to the inner diameter of the air compression energy storage lining cavern 8.

In embodiment 1, the lining of the liner cavern 8 of compressed air energy storage is a poured reinforced concrete layer 2, the head base 4 and the tail base 5 are respectively arranged at two axial ends of the liner cavern 8 of compressed air energy storage, the head base 4 and the tail base 5 are respectively formed by pouring reinforced concrete, the liner cavern 8 of compressed air energy storage, the head base 4 and the tail base 5 enclose an accommodating cavity 9, the integral rubber bag 3 is located in the accommodating cavity 9, the head of the integral rubber bag 3 is communicated with one end of an air inlet pipeline 6 and one end of an air outlet pipeline 7, the air inlet pipeline 6 and the air outlet pipeline 7 are respectively provided with an air inlet valve 13 and an air outlet valve 14, the other end of the air inlet pipeline 6 is connected with an air compressor 10, the other end of the air outlet pipeline 7 is connected with a generator set 11, and the air compressor 10 and the generator set 11 are respectively connected with an electric network 12.

In embodiment 1, a plurality of suspension buckles 15 are fixed on the reinforced concrete layer 2, the plurality of suspension buckles 15 are divided into two rows and arranged at intervals along the axial direction of the air compression energy storage lining cavern 8, each suspension buckle 15 is arranged at a position above the half height of the air compression energy storage lining cavern 8, each suspension buckle 15 is fixed on the reinforced concrete layer 2 through a cement nail 16 with a gasket, a plurality of suspension straps 17 are fixed on the outer wall of the integral rubber bag 3, the plurality of suspension straps 17 are divided into two rows and arranged at intervals along the axial direction of the air compression energy storage lining cavern 8, each suspension strap 17 is arranged at a position above the half height of the integral rubber bag 3, and each suspension strap 17 is connected with one suspension buckle 15.

In embodiment 1, the thickness of the head base 4 is thicker than that of the tail base 5 because the periphery of the head base 4 is not supported by the surrounding rock 1.

The difference between the air compression energy storage lining cavern sealed by the integral rubber bag in the embodiment 2 and the embodiment 1 is that in the embodiment 2, as shown in fig. 4, a geotextile layer 18 is laid on the inner wall of the reinforced concrete layer 2, the geotextile layer 18 is fixed on the inner wall of the reinforced concrete layer 2 through a plurality of cement nails 19, and a gasket 20 is arranged between each cement nail 19 and the geotextile layer 18 in a compression manner.

After the construction of the above-mentioned energy storage inside lining cavern of calming anger, aerify the in-process, air compressor 10 utilizes the surplus electric energy in the electric wire netting 12 to compress the air in the atmosphere, gas after the compression gets into integral rubber bag 3 along admission line 6, integral rubber bag 3 expands under the gas pressure effect, when aerifing to integral rubber bag 3 inflation completely, integral rubber bag 3 hugs closely reinforced concrete layer 2's inner wall, the both ends of integral rubber bag 3 imbed head base 4 and afterbody base 5 respectively, pass through reinforced concrete layer 2 with internal pressure and transmit to country rock 1, integral rubber bag 3 only plays sealed effect, consequently, need not bear the power the effect. In the air release process, the gas in the integral rubber bag 3 is released, the integral rubber bag 3 is separated from the inner wall of the reinforced concrete layer 2, a released space can be provided for the water head pressure accumulated between the integral rubber bag 3 and the reinforced concrete layer 2, the risk that the integral rubber bag 3 is torn by the water head pressure is avoided, and the released high-pressure gas converts the internal energy into stable electric energy through the generator set 11 and is merged into the power grid 12.