A sealed membrane for gravity air energy storage and a gravity air energy storage system

Abstract

The application discloses a sealing film for gravity air energy storage and a gravity air energy storage system, and belongs to the technical field of gravity air energy storage. The sealing film is in a cylinder structure, and upper and lower ends are fixed ends which are anchored to the wall surfaces of a shaft and a gravity assembly respectively. The film body of the sealing film comprises at least one layer of a fiber framework and at least two layers of an elastic matrix, and the outermost layer is the elastic matrix. The fixed end is a convex part formed by rolling the end of the film body outward or inward, and the fixed end framework is arranged in the convex part. The air energy storage system comprises a shaft, a gravity assembly, a pressing block and the sealing film. The pressing block is used for pressing the fixed ends on the sealing film against the wall surfaces of the shaft and the gravity assembly respectively, and the pressing block is detachably connected to the shaft and the gravity assembly through a connecting assembly. The sealing film has great improvement in aspects of bearing tensile stress, film body flexibility, film surface contact friction and fatigue strength, and can be widely applied to the gravity air energy storage system.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gravity air energy storage, and more particularly relates to a sealing membrane for gravity air energy storage and a gravity air energy storage system. BACKGROUND

[0002] At present, all countries in the world are facing the problem of energy structure transformation, and more and more attention is paid to the research on energy storage. As an effective means for the operation of new energy, energy storage can break the characteristics of "immediate use" of electric energy and realize efficient use of energy. As a new type of energy storage method, compressed air energy storage can realize large-capacity electric energy storage, has the advantages of many cycle times, long service life, low cost, and low requirement for geographical conditions, and is one of the most promising large-scale energy storage technologies.

[0003] The air storage chamber of the air energy storage system stores high-pressure gas, the sealing membrane is anchored at both ends of the air storage shaft and the wall surface of the gravity assembly, and the air storage chamber is sealed to withstand the internal pressure of compressed air. With the lifting movement of the gravity assembly, the sealing membrane produces bending deformation, and the anchor end bears a large tensile force. Therefore, the sealing membrane and its anchor connection system are the core technology of the air storage chamber.

[0004] The existing sealing membrane for air energy storage adopts a multi-layer fiber woven cloth grid arrangement enhancement form, the membrane body lacks flexibility, the membrane body has a large curvature in the bending area of the sealing membrane, and the stress is unreasonable, so that the sealing membrane has a large delamination tendency. During the movement of the gravity assembly, the diameter change of the membrane body causes the membrane body to wrinkle, and the air tightness of the sealing membrane is reduced. The friction contact between the membrane body and the wall surface of the air storage shaft causes the membrane body to have insufficient wear resistance, resulting in failure of the cylinder.

[0005] In the existing sealing membrane anchor system for air energy storage, whether the sealing membrane end adopts a filler form or a ring-shaped pressing plate form, holes need to be punched on the membrane body at the sealing membrane anchor end for connection. On the one hand, the anchor end is prone to local stress tearing, and on the other hand, too many anchor hole positions are prone to cause the strength of the sealing membrane body to decrease and the air tightness to fail.

[0006] Therefore, the present application is proposed. SUMMARY

[0007] The purpose of the present application is to provide a sealing membrane for gravity air energy storage. The sealing membrane is in a cylinder structure, the upper and lower ends of the cylinder are fixed ends, and the fixed ends are in a framework covering structure and are anchored to the wall surfaces of the shaft and the gravity assembly, respectively. The membrane body of the sealing membrane includes at least one layer of fiber framework and at least two layers of elastic matrix, and the outermost layer is the elastic matrix. The fixed end is a protruding part formed by rolling the end of the membrane body outward or inward, and the fixed end framework is arranged inside the protruding part.

[0008] Preferably, the sealing film is a conical cylinder structure; it can also be a similar conical cylinder structure, such as a cylinder structure at the upper part and a conical cylinder structure at the lower part.

[0009] Optionally, the film body of the sealing film is a composite structure including 1-5 layers of fiber skeletons and 2-6 layers of elastic matrixes.

[0010] Optionally, the protruding part further includes a fixed end skeleton clamping rubber that clamps the fixed end skeleton.

[0011] Optionally, the fixed end is in a segmented skeleton form or an integral skeleton form.

[0012] Preferably, the central layer of the film body is a fiber skeleton, and the fiber skeleton is covered with a matrix rubber and a transition rubber from inside to outside in sequence on both sides; the outer surface of the transition rubber on one side of the shaft or gravity assembly is covered with wear-resistant rubber, and the outer surface of the transition rubber on the opposite side is covered with air-tight rubber.

[0013] Further, the outermost layer of the fixed end on one side of the shaft or gravity assembly is wear-resistant rubber, and the outermost layer on the opposite side is air-tight rubber.

[0014] Optionally, the material of the matrix rubber, the transition rubber and the fixed end skeleton clamping rubber includes natural rubber; the material of the wear-resistant rubber includes natural rubber or polyurethane; and the material of the air-tight rubber includes butyl rubber or polyurethane.

[0015] Optionally, the fiber skeleton is a high-strength low-elongation material; preferably, the fiber skeleton includes one or more of steel wire, aramid fiber, carbon fiber or glass fiber.

[0016] Optionally, the fixed end skeleton includes a circular steel ring or a special-shaped steel ring.

[0017] Preferably, the fiber skeleton is uniformly arranged along the longitudinal direction of the film body; further preferably, the arrangement form includes unidirectional arrangement or cross arrangement.

[0018] The application further provides a gravity air energy storage system including the sealing film for gravity air energy storage, which includes a shaft, a gravity assembly located inside the shaft, a pressing block and the sealing film located between the shaft and the gravity assembly; the pressing block respectively presses the fixed end on the sealing film against the wall surface of the shaft and the gravity assembly, and the pressing block is detachably connected with the shaft and the gravity assembly through a connecting assembly.

[0019] The fixed end can be a segmented structure, which facilitates the overall transportation and installation of the sealing film body.

[0020] Preferably, grooves corresponding to the fixed end are formed on the inner wall of the shaft and the outer wall of the gravity assembly, or the fixed end is embedded in the grooves through the pressing block.

[0021] The sealing film of the present application has an elastic base and a fiber skeleton, and has a one-way fiber arrangement structure, which has sufficient strength, excellent bending resistance and flexibility, thereby ensuring high pressure resistance of the product; has excellent flexibility, which can effectively improve the rationality and resilience of the film under stress, avoid the problem of film delamination and reduced air tightness, and has excellent wear resistance, which can effectively prevent the cylinder from being damaged due to friction; and has excellent fatigue resistance.

[0022] The fixed end of the sealing film has a high-strength and low-elongation material skeleton covering structure, the fixed end skeleton is covered by the one-way fiber reinforced elastic sealing film body, the fixed end of the sealing film is fixed by pressing block, the film body is complete, and there is no hole caused by strength reduction, the fixed end of the sealing film can withstand large tensile stress, and has significant strength characteristics. The fixed end of the sealing film is filled in the groove of the gas storage shaft and the gravity assembly, so that the stress stability of the anchoring end of the sealing film is significantly increased. The sealing film is an elastic base material, which is further filled in the groove of the gas storage shaft and the gravity assembly under the action of the pressing force of the pressing plate, and has the significant characteristics of enhancing the air tightness of the anchoring part.

[0023] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0025] Figure 1 The sealing film of the present application is shown in the schematic diagram.

[0026] Figure 2 The sealing film of the present application is shown in the schematic diagram.

[0027] Figure 3 The sealing film of the present application is shown in the schematic diagram.

[0028] Figure 4 The sealing film of the present application is shown in the schematic diagram.

[0029] Figure 5A structural diagram of anchoring the sealing film and the inner wall of the shaft according to an embodiment of the present application.

[0030] Figure 6 Another structural diagram of anchoring the sealing film and the inner wall of the shaft according to an embodiment of the present application.

[0031] Figure 7 A structural diagram of anchoring the sealing film and the inner wall of the gravity assembly according to an embodiment of the present application.

[0032] Figure 8 Another structural diagram of anchoring the sealing film and the inner wall of the gravity assembly according to an embodiment of the present application.

[0033] Figure 9 A structural diagram of the gravity air energy storage system.

[0034] Explanation of reference numerals:

[0035] 1, base glue; 2, air-tight glue; 3, wear-resistant glue; 4, fixed end framework glue; 5, transition glue; 6, fiber framework; 7, fixed end framework; 8, shaft; 9, gravity assembly; 10, sealing film; 11, pressing block 1; 12, pressing block 2. DETAILED DESCRIPTION

[0036] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments are illustrative only and do not limit the scope of the present application unless otherwise specifically stated.

[0037] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application its application or uses.

[0038] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus should be considered as part of the description.

[0039] In all of the compositions and methods shown and discussed herein, any specific values should be interpreted as merely exemplary, and are not to be interpreted as a limitation thereon. Thus, other examples of the exemplary embodiments can have different values.

[0040] It should be noted that like numerals and letters refer to like items throughout the several views, and as a result, further discussion of such items is not necessary in the subsequent views.

[0041] Example 1

[0042] A sealing film for a gravity air energy storage system, as shown in Figure 1 The sealing film 10 is a conical cylinder structure, and the upper and lower ends are fixed ends, asFigure 9 as shown, respectively, are anchored to the wall surface of the shaft 8 and the gravity assembly 9.

[0043] The membrane body of the sealing film 10 comprises at least one layer of fiber skeleton and at least two layers of elastic matrix, and the outermost layer is the elastic matrix. Figure 2 As shown, the membrane body of the sealing film 10 comprises one layer of fiber skeleton and four layers of elastic matrix.

[0044] Referring to Figure 2 , the fixed end is a protruding part formed by rolling the end of the membrane body outward, and the fixed end skeleton 7 is arranged inside the protruding part. The inside of the protruding part further comprises a fixed end skeleton adhesive 4 covering the fixed end skeleton 7.

[0045] In this embodiment, referring to Figure 2 and Figure 9 , the central layer of the membrane body is the fiber skeleton 6, and the fiber skeleton 6 is covered with the matrix adhesive 1 and the transition adhesive 5 from inside to outside on both sides; the outer surface of the transition adhesive 5 on one side of the shaft 8 or the gravity assembly 9 is covered with the wear-resistant adhesive 3, and the outer surface of the transition adhesive 5 on the opposite side is covered with the airtight adhesive 2. Further, the outermost layer of the fixed end on one side of the shaft 8 or the gravity assembly 9 is the wear-resistant adhesive 3, and the outermost layer on the opposite side is the airtight adhesive 2.

[0046] The material of the matrix adhesive 1, the transition adhesive 5 and the fixed end skeleton adhesive 4 can be natural rubber; the material of the wear-resistant adhesive 3 can be natural rubber or polyurethane; and the material of the airtight adhesive 2 can be butyl rubber or polyurethane. The airtight adhesive 2 in this embodiment is butyl rubber.

[0047] The fiber skeleton is a high-strength and low-elongation material, which can be one or more of steel wire, aramid fiber, carbon fiber or glass fiber, and in this embodiment, it is steel wire.

[0048] The fixed end can be in the form of segmented skeleton or integral skeleton. In some embodiments, the segmented skeleton form is as shown. Figure 4 In this embodiment, the fixed end is in the form of integral skeleton, and the fixed end skeleton comprises a circular steel ring or a special-shaped steel ring, and in this embodiment, it is a circular steel ring.

[0049] The fiber skeleton is uniformly arranged along the longitudinal direction of the membrane body; further, the arrangement form comprises unidirectional arrangement or cross arrangement. Referring to Figure 3 , in this embodiment, it is unidirectional arrangement.

[0050] A gravity air energy storage system comprises a shaft 8, a gravity assembly 9 located inside the shaft 8, a pressing block and a sealing film 10 located between the shaft 8 and the gravity assembly 9. The pressing block presses the fixed end on the sealing film 10 against the wall surface of the shaft 8 and the gravity assembly 9, respectively. Further, the pressing block comprises a pressing block one 11 and a pressing block two 12, as shown in Figure 5 andFigure 6 As shown, the pressure block 11 presses the lower fixed end of the sealing membrane 10 tightly against the inner wall surface of the shaft 8; as Figure 7 and Figure 8 As shown, the second pressure block 12 presses the upper fixed end of the sealing film 10 against the outer wall surface of the gravity component 9.

[0051] Both pressure block 11 and pressure block 2 12 are detachably connected to the shaft 8 and gravity component 9 via connecting assemblies. In this embodiment, the connecting assembly is a screw connection assembly (not shown in the figure).

[0052] In some other embodiments, the fixed end may be a segmented structure, which facilitates the overall transportation and installation of the sealing membrane.

[0053] See Figure 5 and Figure 7 In this embodiment, grooves corresponding to the fixed end are respectively opened on the inner wall of the vertical shaft 8 and the outer wall of the gravity component 9. The protrusion of the fixed end can be embedded in the groove and then pressed by the pressure block 11 and the pressure block 2 12 respectively.

[0054] In other embodiments, such as Figure 6 and Figure 8 As shown, grooves corresponding to the fixed end can also be opened on the pressure block 11 and pressure block 22, which correspond to the inner wall of the shaft 8 and the outer wall of the gravity component 9, respectively. The protrusion of the fixed end can be embedded in the groove, and then the pressure block 11 and pressure block 22 are pressed tightly on the inner wall of the shaft 8 and the outer wall of the gravity component 9, respectively.

[0055] The membrane and the fixed end have an internal fiber skeleton and an outer multi-layer structure. The outermost layer is a special elastic matrix material that can ensure wear resistance or air tightness. The joint of the two at the fixed end faces the side with the groove. By combining the fiber skeleton and the selection of each layer of elastic matrix material, the stress stability can be significantly increased and the air tightness can be further enhanced.

[0056] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A sealing membrane for gravity air energy storage, characterized by, The sealing film is a cylindrical structure, and the upper and lower ends of the cylinder are fixed ends respectively anchored to the wall surfaces of the shaft and the gravity assembly: The film body of the sealing film comprises at least one fiber skeleton and at least two elastic matrices, and the outermost layer is the elastic matrix; The fixed end is a protruding part formed by rolling the end of the film body outward or inward, and the inside of the protruding part is provided with a fixed end skeleton.

2. The sealing membrane for gravity air energy storage according to claim 1, characterized in that, The inside of the protruding part further comprises a fixed end skeleton adhesive covering the fixed end skeleton.

3. The sealing membrane for gravity air energy storage according to claim 1, characterized in that, The fixed end is in the form of a segmented skeleton or an integral skeleton.

4. The sealing membrane for gravity air energy storage according to any one of claims 1-3, characterized in that, The central layer of the film body is a fiber skeleton, and the fiber skeleton is covered with matrix adhesive and transition adhesive from inside to outside on both sides; the outer surface of the transition adhesive on one side of the shaft or gravity assembly is covered with wear-resistant adhesive, and the outer surface of the transition adhesive on the opposite side is covered with air-tight adhesive.

5. The sealing membrane for gravity air energy storage according to claim 4, characterized in that, The outermost layer of the fixed end towards the shaft or gravity assembly is wear-resistant adhesive, and the opposite side is air-tight adhesive.

6. The sealing membrane for gravity air energy storage according to claim 4, characterized in that, The material of the matrix adhesive and the transition adhesive comprises natural rubber; The material of the wear-resistant adhesive comprises natural rubber or polyurethane; The material of the air-tight adhesive comprises butyl rubber or polyurethane.

7. The sealing membrane for gravity air energy storage according to claim 1, wherein The fiber skeleton is a high-strength and low-elongation material.

8. The sealing membrane for gravity air energy storage according to claim 7, characterized in that, The fiber skeleton comprises one or more of steel wire, aramid fiber, carbon fiber or glass fiber.

9. The sealing membrane for gravity air energy storage according to claim 1, 7 or 8, characterized in that, The fiber skeleton is uniformly arranged along the longitudinal direction of the film body.

10. The sealing membrane for gravity air energy storage according to claim 9, characterized in that, The arrangement form comprises unidirectional arrangement or cross arrangement.

11. A gravity air energy storage system comprising the sealing membrane of any one of claims 1-10, wherein, The vertical shaft, the gravity assembly inside the vertical shaft, the pressing block and the sealing film between the vertical shaft and the gravity assembly; the pressing block presses the fixed end on the sealing film tightly on the wall surface of the vertical shaft and the gravity assembly, and the pressing block is detachably connected with the vertical shaft and the gravity assembly through the connecting assembly.

12. The gravity air energy storage system of claim 11, wherein, Grooves corresponding to the fixed end are respectively formed on the inner wall of the vertical shaft and the outer wall of the gravity assembly; Or, grooves corresponding to the fixed end are formed on the pressing block corresponding to the inner wall of the vertical shaft and the outer wall of the gravity assembly.

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