CN115559587A - Gas storage reservoir air plug structure with reasonable force flow arc line - Google Patents

Gas storage reservoir air plug structure with reasonable force flow arc line Download PDF

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Publication number
CN115559587A
CN115559587A CN202211345477.4A CN202211345477A CN115559587A CN 115559587 A CN115559587 A CN 115559587A CN 202211345477 A CN202211345477 A CN 202211345477A CN 115559587 A CN115559587 A CN 115559587A
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gas storage
gas
storage reservoir
hinged support
spring
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CN115559587B (en
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孙锐
王建国
李培博
张凯
李福清
胡波文
羊嘉杰
梁伟
刘奇
朱晨鸿
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02—Containers for fluids or gases; Supports therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

Abstract

The invention discloses a gas storage reservoir gas plug structure with force flow reasonable arcs, which comprises a body, wherein a gas storage reservoir structure is arranged in the body, a reinforcing layer is arranged at the top end of the gas storage reservoir structure, the reinforcing layer, a lining layer and a sealing layer form an integral structure of a gas storage reservoir, the upper side in the reinforcing layer is connected with an upper pull rod through a spring and a hinged support, an upper arch wire structure, a first hinged fulcrum, a pull rod and a prestress device assembly form an upper gas plug, and the bottom of the upper gas plug is connected with the first spring and a second spring through the pull rod and the hinged support. The device has the advantages that the device is simple in integral structure, reasonably utilizes the mechanics theory, not only reduces the tensile stress of the air plug, but also can well avoid heat exchange with the outside, so that the energy loss is ensured to be smaller, the generated energy is improved, the compressed air energy storage and gas storage warehouse can be ensured to run more safely and efficiently, and the key scientific problem of safely storing high-temperature and high-pressure gas in the gas storage warehouse is effectively solved.

Description

Gas storage reservoir air plug structure with reasonable force flow arc line
Technical Field
The invention relates to the field of compressed air energy storage of underground spaces, in particular to an air plug structure of an air storage with reasonable arc lines of force flow.
Background
In recent years, new energy sources such as wind energy, solar energy and the like are developed and utilized on a large scale in China, but the phenomena of a large amount of wind abandon and light abandon exist in actual operation, so that the utilization rate of the new energy sources is at a reduced level for a long time. The existing mature large-scale energy storage technology is mainly embodied in pumped storage, storage battery energy storage and compressed air energy storage, but pumped storage has strict limitation on geographical ecological conditions, and storage battery energy storage is limited by the problems of manufacturing cost, service life, environmental protection and the like, so that large-scale application is very limited, and compressed air energy storage has the advantages of large energy storage capacity, reliable technology, long operation life and no limitation of terrain, so that the compressed air energy storage technology is popularized and built in a large amount in China in recent years, and under the support of government policies, compressed air energy storage projects in multiple regions are successfully combined in a grid experiment, which also marks that the research, development and application of novel energy storage technologies in China make great progress.
Although the compressed air energy storage project is not limited by landform site selection, the construction of the underground gas storage is the most important link, and the stability and the safety of the gas storage determine whether the project can normally run. The gas storage is generally composed of two layers of structures, namely an internal sealing layer and a lining layer with a supporting function, the outer side of the sealing layer is only attached to the inner side of the lining layer, and air is periodically and circularly charged and discharged in the sealing layer during operation. The preset pressure of most of the gas storage banks in China is 6-12 MPa, the temperature is 25-60 ℃, and the highest pressure of partial power stations can reach 20MPa or even higher. The construction of the gas storage also needs to add a gas plug structure in the chamber to seal the gas inside, which inevitably causes problems of stress concentration and thermal effect, etc., thereby destroying the whole structure of the gas storage. The most important is that for materials such as rock mass, concrete and the like, the mechanical property of the materials is compression resistance, tension resistance and shear resistance, and when the gas storage is in operation, the current mainstream structure inevitably generates larger tensile stress and larger shear stress so as to damage a lining layer and a surrounding rock layer, so that the gas pressure in the gas storage is limited, and the design of the gas storage is particularly important.
In order to overcome the difficulties, the invention provides the gas storage reservoir gas plug structure with the force flow reasonable arc line, the device has a simple integral structure, and reasonably utilizes the mechanical theory, thereby not only reducing the tensile stress of the gas plug, but also well avoiding the heat exchange with the outside, further ensuring less energy loss and improving the generated energy, and further ensuring the safer and higher-efficiency operation of the compressed air energy storage gas storage reservoir, thereby effectively solving the key scientific problem of safely storing high-temperature and high-pressure gas in the gas storage reservoir.
Disclosure of Invention
The invention aims to provide a gas storage reservoir gas plug structure with a reasonable arc line of force flow, gas enters the gas storage reservoir through a pipeline, high temperature carried by the gas is absorbed by a temperature plate, gas load acts on two ends of the gas plug in a mode of uniformly distributing normal load, the gas plug structure is designed according to reasonable stress, only axial compressive stress and small shear stress exist in the gas plug structure, then the gas is released, the temperature plate releases absorbed heat to further heat the gas, the gas pushes a steam turbine to generate power through the pipeline again, and the key scientific problem of safe storage of the high-temperature and high-pressure gas in the gas storage reservoir is effectively solved through a series of steps.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an air storage reservoir air plug structure with a force flow reasonable arc line, which comprises a body, wherein an air storage reservoir structure is arranged in the body, the top end of the air storage reservoir structure is a reinforcing layer, the reinforcing layer, a lining layer and a sealing layer form an integral structure of the air storage reservoir, the upper side in the reinforcing layer is connected with an upper pull rod through a spring and a hinged support, an upper arch line structure, a first hinged support, the pull rod and a prestress device assembly form an upper air plug, the bottom of the upper air plug is connected with the first spring and a second spring through the pull rod and the hinged support, the prestress device is arranged in the middle of the pull rod, the vertex of the upper air plug is of a first hinged support structure, the upper air plug structure is of an open-web arch structure, a temperature plate is embedded in the air storage reservoir structure and is provided with a porous layer structure, the upper side of the upper air plug structure is connected with the outside through a pipeline, the lower side in the reinforcing layer is connected with the hinged support through the first spring and the second spring, the bottom of the lower air plug is connected with the hinged support through the pull rod and the hinge support, the lower hinge support is of the first hinged support structure, the lower air plug structure and the lower hinge support are of the open-web structure, the lower air plug structure, the hinge support is provided with the first spring and the lower hinge support, the hinge support is provided with the liquid hinge support, the hinge structure, and the lower hinge support, and the hinge support, the hinge device, the hinge structure.
Preferably, the two ends of the spring are respectively connected with the reinforcing layer and the pull rod.
Preferably, the hinge support is located in a liquid-filled environment, and the liquid is selected from liquids with small deformation under force.
Preferably, the prestressing device has good sealing performance, and the interior of the prestressing device is in a vacuum environment.
Preferably, the tie rod should be less than the horizontal distance of the air lock structure.
Preferably, the temperature plate is uniformly arranged inside the air plug.
Preferably, the hinge fulcrum structure is as small as possible, and only small corners at two ends of the air plug need to be ensured.
Preferably, the high polymer material embedded with the low-permeability material at two sides of the pull rod can be butyl rubber, natural rubber, ethylene propylene diene monomer rubber or glass fiber reinforced plastic.
Preferably, the sealing layer should have air leakage prevention capability, and may be a high molecular material with low permeability, such as butyl rubber, natural rubber, ethylene propylene diene monomer rubber or glass fiber reinforced plastic.
Preferably, the upper air lock is shown in the figure, and the arch structure of the upper air lock satisfies the equation:
Figure BDA0003917059060000031
wherein f is the height of the arch structure, h is the length of the pull rod, m is the weight of the arch structure, q a Linear pressure, g is gravitational acceleration. The results of the axial force, the shearing force and the bending moment are shown in a second graph, wherein the negative number is compressive stress or left-lower-right-upper shearing force or left-clockwise-right-anticlockwise bending moment.
Preferably, the upper air lock is shown in the figure, and the arch structure of the upper air lock satisfies the equation:
Figure BDA0003917059060000032
wherein f is the height of the arch structure, h is the length of the pull rod, m is the weight of the arch structure, q a Is the line pressure and g is the acceleration of gravity. The results of axial force, shearing force and bending moment are shown in the fourth figure, wherein the negative number is compressive stress or left-lower-right-upper shearing force or left-clockwise-right-anticlockwise bending moment.
The invention discloses the following technical effects: according to the gas storage reservoir gas plug structure with the reasonable arc line of force flow, gas is transported through the pipeline, high temperature carried by the gas is absorbed by the temperature plate in the gas storage reservoir, and when the gas is released, the temperature plate releases the temperature, so that the maximum utilization of energy is guaranteed; when the gas storage is filled with gas, force is applied to the arch wire in a uniformly-distributed load mode, the arch wire structure is beneficial to the structural design, so that the interior of the arch wire structure only has the action of axial compressive stress, the bottom of the arch wire structure can generate horizontal displacement, but a pull rod at the bottom can restrict the displacement and provide certain initial prestress for the arch wire structure, the arch wire structure cannot generate large horizontal deformation under the action of air pressure so as to extrude and damage a rock area, the bottom of the gas plug is connected with a reinforcing plate and the pull rod through a hinged support and a spring, the interior of the gas plug is filled with buffer liquid, and the structure can greatly weaken the impact of the gas on a rock body in the vertical direction; the left side and the right side of the gas storage are distributed with a sealing layer and a lining layer which not only play a role of supporting, but also have a role of preventing gas leakage.
The device has the advantages that the device is simple in integral structure, reasonably utilizes the mechanical theory, not only reduces the tensile stress of the air plug, but also can well avoid heat exchange with the outside, so that the energy loss is ensured to be small, the generated energy is improved, the compressed air energy storage and gas storage is ensured to run more safely and efficiently, and the key scientific problem of safely storing high-temperature and high-pressure gas in the gas storage is effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of the upper air lock with one-way and multi-gear valves of the present invention;
FIG. 2 is a graph of axial force, shear force and bending moment distribution of the upper air lock structure with unidirectional and multiple gear transmission valves of the present invention;
FIG. 3 is a schematic view of the lower air lock with one-way and multi-gear valves of the present invention;
FIG. 4 is a graph of the axial force, shear force and bending moment distribution of the lower air lock structure with unidirectional and multiple gear drive valves of the present invention;
FIG. 5 is a schematic diagram of the construction of the underground energy storage device of the present invention with unidirectional and multiple gear drive valves;
fig. 6 is a schematic view of a one-way valve of the underground energy storage device of the present invention with one-way and multiple gear drive valves.
Wherein: 1. a first spring; 2. a hinged support; 3. a second spring; 4. a pipeline; 5. an upper arch wire structure; 6. a first hinge pivot point; 7. a temperature plate; 8. a prestressing device; 9. surrounding rocks; 10. a pull rod; 11. a lower arch line structure; 12. a sealing layer; 13. a lining layer; 14. a reinforcement layer; 15. a nut; 16. arranging a steel sheet structure; 17. a buffer solution; 18. a lower steel sheet structure; 19. and a second hinge point.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 5-6, the invention provides a gas storage reservoir air lock structure with reasonable force flow arc, which comprises an underground gas storage reservoir and a fixed hinged support and is characterized in that: the underground gas storage is composed of a first spring 1, a hinged support 2, a second spring 3, a pipeline 4, an upper arch line structure 5, a first hinged support 6, a temperature plate 7, a prestress device 8, surrounding rocks 9, a pull rod 10, a lower arch line structure 11, a sealing layer 12, lining layers 13 and reinforcing layers 14, a fixed hinged support is composed of a nut 15, an upper steel sheet structure 16, a buffer solution 17, a lower steel sheet structure 18 and a second hinged support 19, the underground gas storage is integrally surrounded by the surrounding rocks 9, the upper side and the lower side of the underground gas storage are reinforcing layers 14, the inner side of each reinforcing layer 14 is connected with the hinged support 2 through the first spring 1, the second spring 3 and the hinged support 2, the first spring 1, the second spring 3 and the hinged support 2 are connected with a compression rod 11 located on the upper side, a buffer liquid 19 is arranged in the middle of the upper compression rod 11 and the reinforcing layers 14, the middle of the upper compression rod 11 is connected with the prestress device 8, the inner side of the upper compression rod 11 is connected with the arch line structure 5, the first spring support 6 is embedded in the middle of the underground gas storage 5, the reinforcing layers 14 and the pipeline 4 extends to the lower side of the underground gas storage, and the lining layers 13 are connected with the underground gas storage through the underground gas storage uniformly distributed through the first spring structure and the lower side of the underground gas storage, and the lower compression rod 11.
In a further optimized scheme, no gap is left between the pipeline 4 and the reinforcing layer 14 and the pull rod 10, and the outer side of the pipeline is in a sealing state.
In a further advantageous embodiment, the line 4 can serve as a passage for the feed gas 13 as well as for the discharge gas 7.
In a further optimized scheme, a buffer liquid is filled between the reinforcing layer 14 and the pull rod 10.
In a further optimized scheme, the interior of the prestress device 8 is vacuum, so that the rod piece is in a tension state in an initial state.
In a further optimized scheme, one side of the reinforcing layer 14 close to the pull rod 10 and the outer side of the pull rod 10 are both coated with oil sealing materials.
In a further optimized scheme, the first spring 1 has higher rigidity and is initially in a tension state.
In a further optimized scheme, the second spring 3 is low in rigidity and is initially in a compressed state.
In a further preferred embodiment, the second pivot point 19 in the pivot bearing 2 can be moved in the direction of the tie rod 10.
In a further optimized scheme, the length of the reinforcing layer 14 is slightly longer than the sum of the widths of the sealing layers on the two sides, the lining layer and the interior of the gas storage.
In a further optimized scheme, the temperature plate 7 is of a multi-layer porous structure, and the material of the temperature plate is a material which is favorable for heat exchange.
Further optimize the scheme, the inside crimping of both ends of pull rod 10 has nut 15, and the inside wall of pull rod 10 installs last steel sheet structure 16, and the bottom end of going up steel sheet structure 16 is connected with down steel sheet structure 18, and goes up the junction of steel sheet structure 16 and lower steel sheet structure 18 and link to each other through second hinge fulcrum 19.
The working principle is as follows:
after air is compressed by the compressor, input air 13 reaches the inside of the gas storage along the pipeline 4, as the air inside the gas storage is continuously compressed, the air pressure is increased, the temperature plate 7 starts to quickly absorb heat to store more energy, the air pressure and the gravity of the system directly act on the arch line structure 5 and the arch line structure 11, the arch line structure 5 and the arch line structure 11 start to generate horizontal thrust at the bottom and generate horizontal displacement, due to the existence of the pre-stressing device 8, the displacement and the horizontal stress which initially generate can be counteracted by the pull rod 10, as the stress is continuously increased, the distance between the two pull rods inside the pre-stressing device 8 is increased, the danger that the pull rod 10 is damaged is avoided, and the continuous increase of the space inside the pre-stressing device 8 can provide larger pulling force to control the horizontal displacement of the arch line structure 5 and the arch line structure 11 to be maintained at a lower acceptable level, meanwhile, the bottom of the arch line structure 5 and the arch line structure 11 can also generate vertical pressure, and the partial pressure can be reduced to the reinforcing liquid reinforcing layer 14 through the first spring 1, the support 2, and the reinforcing liquid 14, and the reinforcing layer 14 can be further reduced by the reinforcing liquid, and the reinforcing layer 14, and the reinforcing rock protection layer can be protected by being reduced; subsequently, gas release 7 is carried out, the temperature begins to be reduced along with the reduction of the internal pressure, at the moment, the temperature plate 7 releases the energy stored in the previous step to heat the gas, the energy utilization rate can be improved while the energy loss of heat conduction is reduced, and due to the design of the arch wire structure, when the gas pressure reaches a peak value, the arch wire structure 5 and the arch wire structure 11 are used as core gas plug devices of the gas storage, only small shear stress can be generated, the whole structure of the gas storage is protected from being damaged, and the service life of the gas storage can be greatly prolonged.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims (8)

1. The invention provides a gas storage reservoir gas plug structure with a reasonable arc line of force flow, which comprises an underground gas storage reservoir and a fixed hinged support and is characterized in that: the underground gas storage is composed of a first spring (1), a hinged support (2), a second spring (3), a pipeline (4), an upper arch line structure (5), a first hinged support (6), a temperature plate (7), a pre-stress device (8), surrounding rocks (9), a pull rod (10), a lower arch line structure (11), a sealing layer (12), a lining layer (13) and a reinforcing layer (14), wherein the fixed hinged support is composed of a nut (15), an upper steel sheet structure (16), a buffer solution (17), a lower steel sheet structure (18) and a second hinged support (19), the underground gas storage is integrally surrounded by the surrounding rocks (9), the upper side and the lower side of the underground gas storage are provided with the reinforcing layer (14), the inner side of the reinforcing layer (14) is connected with the hinged support (2) through the first spring (1), the second spring (3) and the hinged support (2), the first spring (1), the second spring (3) and the hinged support (2) are connected with a compression rod (11) positioned on the upper side, the compression rod (11) is connected with the middle of the reinforcing layer (14), the upper side of the middle liquid embedding device (6) is connected with the upper side of the middle liquid pressing rod structure (11), the upper hinged support (6), and the inner side of the first spring (11) is connected with the middle liquid embedding device (11), the utility model discloses a gas storage warehouse, including reinforcing layer (14) and the inside pipeline (4) that has run through of side depression bar (11) and extend to underground gas storage storehouse, there are a large amount of evenly distributed's temperature board (7) underground gas storage storehouse inside with being located, the both sides of underground gas storage storehouse are sealing layer (12) and lining layer (13) respectively, downside the depression bar inboard is connected with arch wire structure (11), arch wire structure (11) are connected through first hinge fulcrum (6).
2. The gas storage reservoir gas plug structure with force flow rational arcs of claim 1, characterized in that: the hinged support (2) is filled with buffer liquid, and the second hinged support (19) moves along the direction of the pull rod (10).
3. The gas storage reservoir gas plug structure with force flow reasonable arc of claim 1, wherein: the interior of the prestress device (8) is in a vacuum environment, and a certain gap is reserved between the two pull rods (10) in an initial state.
4. The gas storage reservoir gas plug structure with force flow rational arcs of claim 1, characterized in that: the upper arch line structure (5) satisfies the equation
Figure FDA0003917059050000021
5. The gas storage reservoir gas plug structure with force flow rational arcs of claim 1, characterized in that: the lower arch line structure (11) satisfies the equation
Figure FDA0003917059050000022
6. The gas storage reservoir gas plug structure with force flow reasonable arc of claim 1, wherein: the temperature plate (7) is of a multi-layer porous structure.
7. The gas storage reservoir gas plug structure with force flow rational arcs of claim 1, characterized in that: the length of the reinforcing layer (14) is larger than the sum of the thicknesses of the sealing layer, the lining layer and the gas storage reservoir on two sides.
8. The gas storage reservoir gas plug structure with force flow rational arcs of claim 1, characterized in that: the inside crimping in both ends of pull rod (10) has nut (15), and the inside wall of pull rod (10) installs steel sheet structure (16), the bottom end of going up steel sheet structure (16) is connected with down steel sheet structure (18), and goes up the junction of steel sheet structure (16) and lower steel sheet structure (18) and run through continuously through second hinge fulcrum (19).
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102705693A (en) * 2012-05-16 2012-10-03 海工英派尔工程有限公司 High pressure gas storage device of deeply-embedded steel lining structure
CN108916105A (en) * 2018-07-09 2018-11-30 中国矿业大学 A kind of constant pressure compression air energy-storing apparatus
CN212319398U (en) * 2020-01-14 2021-01-08 长沙理工大学 Underground gas storage
CN216811786U (en) * 2021-10-29 2022-06-24 势加透博（上海）能源科技有限公司 Compressed air energy storage system
CN217109111U (en) * 2022-02-17 2022-08-02 中海石油气电集团有限责任公司 Low-pressure liquid hydrogen concrete storage tank with large-scale vault structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102705693A (en) * 2012-05-16 2012-10-03 海工英派尔工程有限公司 High pressure gas storage device of deeply-embedded steel lining structure
CN108916105A (en) * 2018-07-09 2018-11-30 中国矿业大学 A kind of constant pressure compression air energy-storing apparatus
CN212319398U (en) * 2020-01-14 2021-01-08 长沙理工大学 Underground gas storage
CN216811786U (en) * 2021-10-29 2022-06-24 势加透博（上海）能源科技有限公司 Compressed air energy storage system
CN217109111U (en) * 2022-02-17 2022-08-02 中海石油气电集团有限责任公司 Low-pressure liquid hydrogen concrete storage tank with large-scale vault structure

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