CN115234823A - A Gravity Compressed Air Storage System Based on Strengthening the Strength of the Anchorage End of the Sealing Membrane - Google Patents

Abstract

The invention discloses a gravity compressed air storage system based on enhancing the strength of an anchoring end of a sealing film, comprising a sealing film, a wedge-shaped glass fiber reinforced plastic and a vertical shaft. The sealing film includes a sealing layer and a tension layer extending out of the sealing layer, and the tension layer extends out The part of the sealing layer is the anchoring end of the sealing film; the anchoring end extends to the bottom of the wedge-shaped glass fiber reinforced plastic, and epoxy resin is filled in the wedge-shaped glass fiber reinforced plastic to fix the anchor end; A seal is arranged at the bottom; the anchoring ends of the two ends of the sealing membrane are respectively sealed and fixed with the bottom of the gravity component and the wall surface of the shaft. The anchoring end of the sealing film of the invention forms a composite material with glass fiber reinforced plastic and epoxy resin, and the anchoring force is converted from static friction to static friction and tensile stress through bolt anchoring between the composite material and the wedge-shaped pressing plate, and the anchoring method is safe and reliable. It can effectively prevent the sealing film from being damaged or pulled off during the pressure-bearing process.

Description

A Gravity Compressed Air Storage System Based on Enhancing the Strength of the Anchor End of the Sealing Membrane

technical field

The invention relates to the technical field of electric energy storage, in particular to a gravity compressed air storage system based on enhancing the strength of the anchoring end of a sealing membrane.

Background technique

The gravity compressed air gas storage system converts the excess electric energy in low power consumption periods or in areas rich in renewable energy power into air pressure potential energy, and converts the potential energy of air into electrical energy in peak power consumption periods or in areas with poor power consumption and high power consumption. It is a large-scale energy storage technology. It uses green, abundant, and easy-to-use air as the medium to skillfully solve the spatio-temporal contradiction of electric energy utilization. At the same time, it can splice intermittent electric power from renewable energy sources to improve the quality of electric energy. Compressed air energy storage technology is safe, efficient, low-carbon, and not subject to spontaneous combustion conditions. It is an important application technology in the field of energy and power.

In the gravity compressed air storage system, a sealing film is installed to prevent gas leakage. At present, the anchoring of the sealing film is generally realized by directly fixing the sealing film with bolts. In this way, the friction force generated by the preloading force of the bolts will The sealing film is fixed. On the one hand, due to the elasticity of the sealing film itself, the sealing film cannot be well pressed against the wall surface. .

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

For this reason, the embodiment of the present invention proposes a gravity compressed air storage system based on enhancing the strength of the anchoring end of the sealing membrane.

The present invention proposes a gravity compressed air storage system based on enhancing the strength of the anchoring end of the sealing membrane, including:

A flexible cylinder-shaped sealing film, the sealing film includes a sealing layer and a tension layer extending out of the sealing layer, the part of the tension layer extending out of the sealing layer is the anchoring end of the sealing film, the Anchoring ends are distributed at both ends of the sealing membrane;

The wedge-shaped FRP hollow structure, the anchor end extends to the bottom of the wedge-shaped FRP, epoxy resin is filled in the wedge-shaped FRP to fix the anchor end, the bolt passes through the wedge-shaped pressure plate and the wedge-shaped FRP to anchor the The end is fixed on the wall, and the bottom of the wedge-shaped FRP is provided with a seal;

shaft, the gravity assembly can be movably inserted into the shaft, the sealing film is arranged in the gap between the gravity assembly and the shaft, and the anchor ends at both ends of the sealing film are respectively connected to the gravity assembly The bottom of the shaft is sealed and fixed to the inner wall of the shaft.

In some embodiments, the tensile layer is a single or multi-layer aramid fiber layer, and the sealing layer is a rubber layer.

In some embodiments, an annular gasket is provided between the wedge-shaped FRP and the wedge-shaped pressing plate.

In some embodiments, the thickness of the FRP wedge is the same as the thickness of the non-anchored end of the sealing membrane.

In some embodiments, the top of the sealing film is folded inward to form an inner ring sealing film and an outer ring sealing film connected at the top, the inner ring sealing film is fixedly connected to the bottom of the gravity component, and the outer ring sealing film The inner wall of the shaft is fixedly connected.

In some embodiments, the sealing membrane is a conical cylinder structure, and the outer diameter of the bottom end of the conical cylinder is larger than the outer diameter of the top end of the conical cylinder.

In some embodiments, the gravity assembly includes a first gravity assembly located underground and a second gravity assembly located on the ground, the first gravity assembly includes a pressure-bearing cylinder, the pressure-bearing cylinder is filled with a gravity member, and the sealing The anchoring end of one end of the membrane is fixedly connected to the bottom of the pressure-bearing cylinder.

In some embodiments, a limiting element is provided on the top of the pressure-bearing cylinder, and the second gravity component is arranged on the top of the limiting element.

In some embodiments, several support rings are arranged on the inner wall of the pressure-bearing cylinder, and the support rings are coincident with the axial center of the pressure-bearing cylinder.

In some embodiments, the second gravity component includes several gravity blocks arranged superimposed on each other.

Compared with the prior art, the beneficial effects of the present invention are:

The anchoring end of the sealing film of the present invention forms a composite material with glass fiber reinforced plastics and epoxy resin, and the anchoring force is converted from static friction force to static friction force and tensile stress through the composite material and the wedge-shaped pressure plate through bolt anchorage, and the anchoring method is safe and reliable. It can effectively prevent the sealing membrane from being damaged or pulled off during the pressure bearing process.

The bottom of the wedge-shaped FRP of the present invention is provided with a sealing member to prevent gas from escaping from the gap between the wedge-shaped FRP and the wall surface, thereby improving the sealing performance of the shaft.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic structural view of a sealing film proposed by an embodiment;

Fig. 2 is a schematic structural diagram of a gravity compressed air storage system proposed by an embodiment;

3 is a schematic diagram of a three-dimensional structure of a sealing film proposed by an embodiment;

Fig. 4 is a schematic diagram of an anchoring structure of a sealing film proposed by an embodiment;

Fig. 5 is a schematic structural diagram of a gravity compressed air storage system proposed in another embodiment;

Fig. 6 is a schematic structural diagram of a gravity compressed air storage system proposed in another embodiment;

Description of reference numbers:

1. Sealing film; 2. Tensile layer; 3. Sealing layer; 4. Wedge-shaped FRP; 5. Wedge-shaped pressure plate; 6. Anchoring end; 7. Non-anchoring end; 11. Steel lining; 12. Inner ring sealing film; 13. Outer ring sealing film; 14. Gravity component; 15. First gravity component; 16. Second gravity component; 17. Pressure cylinder; 18. Gravity component; 19 , gravity block; 20, limit element; 21, support ring.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The following describes the gravity compressed air storage system based on enhancing the strength of the anchoring end of the sealing membrane according to the embodiments of the present invention with reference to the accompanying drawings.

As shown in FIGS. 1-6 , the gravity compressed air storage system based on the enhanced strength of the anchoring end of the sealing membrane of the present invention includes a sealing membrane 1 , a shaft 10 , wedge-shaped FRP 4 and a gravity component 14 .

The shaft 10 is used to store compressed air, and one end of the sealing membrane 1 is sealed and connected to the inner wall of the shaft 10 .

In some embodiments, a steel liner 11 is provided on the inner wall of the shaft 10 . The arrangement of the steel liner 11 enables one end of the sealing membrane 1 to be better fixed and pressed against the inner wall of the shaft 10 .

The sealing film 1 is in the shape of a flexible cylinder. The sealing film 1 includes a sealing layer 3 and a tension layer 2 extending out of the sealing layer 3. The part of the tension layer 2 extending out of the sealing layer 3 is the anchoring end 6 of the sealing film 1. The anchoring end 6 are distributed on both ends of the sealing film 1.

The sealing film 1 is formed by compounding the sealing layer 3 and the tension layer 2, specifically, the length of the tension layer 2 of the sealing film 1 is greater than the length of the sealing layer 3, and both ends of the tension layer 2 extend out of the sealing layer 3, Thus, the part of the tension layer 2 is exposed and distributed at both ends of the sealing layer 3. The main function of the tension layer 2 is to bear the tensile stress and the compressive stress. The main function of the tension layer is local compression for sealing. The sealing layer 3 is made of a material with certain elasticity. Therefore, the part of the tensile layer 2 extending out of the sealing layer 3 is used as the anchoring end 6 of the sealing film 1 . It can be understood that the anchoring ends 6 of the sealing film 1 are distributed at both ends of the sealing film 1 , so that the two ends of the sealing film 1 can be fixed on the wall as the anchoring ends 6 .

In some embodiments, the tensile layer 2 is a single-layer or multi-layer aramid fiber layer, and the sealing layer 3 is a rubber layer. The composite material formed by the aramid fiber layer and the rubber layer is used as the sealing film 1. Among them, the aramid fiber is a new high-tech synthetic fiber with high strength, high modulus, high temperature resistance, acid and alkali resistance, and light weight. It is suitable for use as the tensile layer 2 of the sealing film 1; the rubber is a highly elastic polymer material with reversible deformation, which is elastic at room temperature, can produce large deformation under a small external force, and can return to its original shape after the external force is removed. Suitable for use as the sealing layer 3 of the sealing film 1 .

The wedge-shaped FRP 4 is a hollow structure, and the hollow structure of the wedge-shaped FRP 4 is used for inserting the anchoring end 6 of the sealing film 1 and injecting epoxy resin. The anchoring end 6 extends into the bottom of the wedge-shaped FRP 4, and epoxy resin is filled in the wedge-shaped FRP 4 to fix the anchoring end 6. The bolt 9 passes through the wedge-shaped pressing plate 5 and the wedge-shaped FRP 4 to fix the anchoring end 6 on the wall.

The specific method when the sealing film 1 is anchored to the wall is as follows: firstly, the anchoring end 6 of the sealing film 1 is inserted into the wedge-shaped FRP 4 of the hollow structure, and then an appropriate amount of epoxy resin is injected into the wedge-shaped FRP 4 of the hollow structure. After the epoxy resin is solidified, the epoxy resin fixes the anchoring end 6 to prevent the sealing film 1 from being pulled off under pressure during the inflation process of the gravity compressed air storage system. The epoxy resin, wedge-shaped FRP 4 and the anchoring end 6 form a composite material, increasing the The strength of the anchoring end 6 is improved; the wedge-shaped pressure plate 5 is set outside the wedge-shaped glass fiber reinforced plastic 4, and the bolt 9 passes through the wedge-shaped pressure plate 5 and the wedge-shaped glass fiber reinforced plastic 4 to anchor the sealing film 1 on the wall.

In this anchoring method, epoxy resin, wedge-shaped FRP 4 and anchoring end 6 form a composite material, and the anchoring force is converted from static friction to static friction and tensile stress through the composite material and wedge-shaped pressure plate 5. The method is safe and reliable, and can effectively prevent the sealing membrane 1 from being damaged or pulled off during the pressure bearing process. That is to say, the present invention transforms the anchoring mode by utilizing the frictional force generated by the pre-tightening force of the bolt 9 into an anchoring mode relying on the tensile and compressive properties of the tensile layer 2 and acting together by static friction and tensile stress.

In some embodiments, the thickness of the wedge-shaped FRP 4 is the same as the thickness of the non-anchor end 7 of the sealing membrane 1 . It can be understood that the non-anchor end 7 of the sealing film 1 is the composite structure layer of the tensile layer 2 and the sealing layer 3. The thickness of the non-anchor end 7 of the sealing film 1 is the same so that the overall thickness of the sealing film 1 is consistent, avoiding the influence caused by the thickness difference.

In some embodiments, an annular gasket is provided between the wedge-shaped FRP 4 and the wedge-shaped pressing plate 5 . It can be understood that an annular gasket is provided between the wedge-shaped FRP 4 and the wedge-shaped pressing plate 5 to enable compaction between the wedge-shaped FRP 4 and the wedge-shaped pressing plate 5 , so that the sealing film 1 can be better pressed against the wall. In some embodiments, the annular gasket arranged between the wedge-shaped FRP 4 and the wedge-shaped pressing plate 5 is a layer of annular thin soft gasket.

In some embodiments, a sealing member 8 is provided at the bottom of the wedge-shaped FRP 4 . It can be understood that the sealing member 8 can prevent gas from escaping from the gap between the wedge-shaped FRP 4 and the wall. Wherein, the sealing member 8 can be a gas-stop rubber ring or a pc head, and it can be understood that the sealing member 8 can also be other suitable accessories.

The gravity assembly 14 is movably plugged into the shaft 10 , there is a gap between the gravity assembly 14 and the shaft 10 , and the sealing film 1 is arranged in the gap between the gravity assembly 14 and the shaft 10 . The anchoring ends 6 at both ends of the sealing membrane 1 are respectively sealed and fixed to the bottom of the gravity assembly 14 and the inner wall of the shaft 10 . Specifically, the two ends of the sealing membrane 1 are anchoring ends 6, that is, the sealing membrane 1 has two anchoring ends 6, one of which is fixedly connected to the bottom of the gravity component 14, and the other anchoring end 6 is fixedly connected to the shaft 10 wall. The anchoring method of the anchoring end 6 of the sealing film 1 and the gravity component 14 and the anchoring method of the anchoring end 6 of the sealing film 1 and the vertical shaft 10 are the same, and both of them first form epoxy resin, wedge-shaped glass fiber reinforced plastics 4 and the anchoring end 6 at the anchoring end 6. Composite materials, and then a wedge-shaped pressure plate 5 is set on the outside of the wedge-shaped glass fiber reinforced plastic 4, and the sealing film 1 is anchored on the wall by bolts 9 passing through the wedge-shaped pressure plate 5 and the wedge-shaped glass fiber reinforced plastic 4.

In some embodiments, the top of the flexible cylinder-shaped sealing membrane 1 is folded inward to form an inner ring sealing membrane 12 and an outer ring sealing membrane 13 connected at the top, the inner ring sealing membrane 12 is fixedly connected to the bottom of the gravity assembly 14, and the outer ring sealing membrane 13 is fixedly connected to the bottom of the gravity assembly 14. The ring sealing membrane 13 is fixedly connected to the inner wall surface of the shaft 10 .

In some embodiments, the sealing membrane 1 has a conical cylinder structure, and the outer diameter of the bottom end of the conical cylinder is larger than the outer diameter of the top end of the conical cylinder. It can be understood that by setting the sealing film 1 into a conical cylinder structure, after the sealing film 1 is folded, the inner ring conical cylinder sealing film at the small port end is inside, and the outer ring conical cylinder sealing film at the large port end is outside. , There is a gap between the inner ring cone sealing film and the outer ring cone sealing film, so that the gravity assembly 14 can easily drive the inner ring cone sealing film up and down during the energy storage and energy release process when moving up and down move.

In some embodiments, the gravity assembly 14 includes a first gravity assembly 15 located underground and a second gravity assembly 16 located on the ground, the first gravity assembly 15 includes a pressure-bearing cylinder 17, and the pressure-bearing cylinder 17 is filled with a gravity member 18, sealed The anchor end 6 at one end of the membrane 1 is fixedly connected to the bottom of the pressure-bearing cylinder 17 . A limiting element 20 is arranged on the top of the pressure bearing cylinder 17 , and the second gravity component 16 is arranged on the top of the limiting element 20 .

Wherein, the gravity member 18 may be sand, that is, the sand is filled in the pressure-bearing cylinder 17 . One end of the sealing membrane 1 is sealingly connected to the bottom of the pressure-bearing cylinder 17, and the pressure-bearing cylinder 17, the sealing membrane 1 and the shaft 10 are located in the space below the sealing membrane 1 to enclose an air storage chamber. The pressure-bearing cylinder 17 is a cylindrical structure surrounded by steel plates, with a smooth surface, which can increase the sealing performance when connected with the sealing film 1; the gravity component 14 is generally made of concrete, and air leakage will occur under the action of high-pressure air In some cases, by filling the pressure-bearing cylinder 17 with sand to replace the concrete gravity block, the airtightness can be improved to prevent air leakage from the concrete gravity block, thereby ensuring the sealing characteristics of the air storage chamber, which can withstand higher pressure and lift The energy density of the system energy storage.

In some embodiments, a stop element 20 is provided on the top of the pressure cylinder 17, and the pressure cylinder 17 moving downward is supported on the ground at the top of the shaft 10 by the limit element 20, so that the pressure cylinder 17 is located at At the lowest position, there is a certain space in the air storage cavity, so that the gravity assembly 14 can be jacked up when a sufficient amount of compressed air is introduced into the air storage cavity. The second gravity assembly 16 is arranged on the top of the limiting element 20. By setting the second gravity assembly 16 of the gravity assembly 14 on the ground, when realizing large energy storage, it is not necessary to concentrate all the gravity assemblies 14 in the shaft 10, which can The height of the shaft 10 is reduced, thereby reducing the excavation volume and engineering difficulty of the shaft 10 .

In some embodiments, a plurality of support rings 21 are arranged on the inner wall of the pressure bearing cylinder 17 along the axial direction, and the plurality of support rings 21 are arranged concentrically with the pressure bearing cylinder 17. By setting the support rings 21, the pressure bearing cylinder can be enlarged. 17 intensities.

In some embodiments, the second gravity assembly 16 includes several superimposed gravity blocks 19, and several gravity blocks 19 are superimposed on the top of the limiting element 20. By setting the second gravity assembly 16 into multiple gravity blocks 19, It can reduce the difficulty of hoisting and facilitate the hoisting construction.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms may refer to different embodiments or examples. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. A gravity compressed air storage system based on enhancing the strength of the anchoring end of the sealing membrane, characterized in that it comprises: A flexible cylinder-shaped sealing film, the sealing film includes a sealing layer and a tension layer extending out of the sealing layer, the part of the tension layer extending out of the sealing layer is the anchoring end of the sealing film, the Anchoring ends are distributed at both ends of the sealing membrane; The wedge-shaped FRP hollow structure, the anchor end extends to the bottom of the wedge-shaped FRP, epoxy resin is filled in the wedge-shaped FRP to fix the anchor end, the bolt passes through the wedge-shaped pressure plate and the wedge-shaped FRP to anchor the The end is fixed on the wall, and the bottom of the wedge-shaped FRP is provided with a seal; shaft, the gravity assembly can be movably inserted into the shaft, the sealing film is arranged in the gap between the gravity assembly and the shaft, and the anchor ends at both ends of the sealing film are respectively connected to the gravity assembly The bottom of the shaft is sealed and fixed to the inner wall of the shaft. 2. The gravity compressed air storage system according to claim 1, wherein the tension layer is a single-layer or multi-layer aramid fiber layer, and the sealing layer is a rubber layer. 3. The gravity compressed air storage system according to claim 1, wherein an annular gasket is arranged between the wedge-shaped FRP and the wedge-shaped pressure plate. 4. The gravity compressed air storage system of claim 1, wherein the thickness of the wedge-shaped FRP is the same as the thickness of the non-anchor end of the sealing membrane. 5. The gravity compressed air storage system according to claim 1, wherein the top of the sealing film is folded inward to form an inner ring sealing film and an outer ring sealing film connected at the top, and the inner ring sealing film The bottom of the gravity component is fixedly connected, and the outer ring sealing film is fixedly connected to the inner wall of the shaft. 6. The gravity compressed air gas storage system according to claim 5, wherein the sealing membrane is a cone-shaped cylinder structure, and the outer diameter of the bottom end of the cone-shaped cylinder is larger than that of the cone-shaped cylinder. Top outer diameter. 7. The gravity compressed air storage system according to claim 1, wherein the gravity assembly comprises a first gravity assembly located underground and a second gravity assembly located on the ground, the first gravity assembly includes a pressure-bearing The pressure-bearing cylinder is filled with gravity components, and the anchor end at one end of the sealing membrane is fixedly connected to the bottom of the pressure-bearing cylinder. 8 . The gravity compressed air storage system according to claim 7 , wherein a limiting element is arranged at the top of the pressure-bearing cylinder, and the second gravity component is arranged on the top of the limiting element. 9. The gravity compressed air storage system according to claim 7, characterized in that several support rings are arranged on the inner wall of the pressure-bearing cylinder, and the support rings coincide with the axis of the pressure-bearing cylinder. 10. The gravity compressed air storage system according to claim 8, characterized in that, the second gravity assembly comprises several gravity blocks arranged superimposed on each other.

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