Steel lining structure for compressed air energy storage chamber and splicing method of steel lining structure

Abstract

The invention relates to the technical field of compressed air energy storage, in particular to a steel lining structure for a compressed air energy storage chamber and a splicing method thereof.The steel lining structure comprises a plurality of steel linings, vertical steel plates, rubber strips, channel steel covers and joints; the multiple steel linings, the vertical steel plates, the rubber strips and the channel steel covers are spliced in the section direction of the chamber to form a steel lining section. The multiple steel lining sections are sequentially spliced in the axial direction of the chamber through the multiple nodes, and a steel lining structure matched with the shape of the inner wall of the chamber is formed. Rubber strips are filled among the steel linings and are connected through a channel steel cover, so that a space is provided for heating expansion of the steel linings in the inflation and gas storage stages, and bulging deformation of the steel linings is avoided; welding seams between the sealing layers are fewer, the integrity is higher, and the chamber airtightness is better; therefore, the technical problem that when an existing steel lining serves as a sealing layer of the compressed air energy storage chamber, heating expansion exists can be solved, bulging deformation of the steel lining at the high temperature can be better avoided, and the air tightness of the chamber is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage, and in particular to a steel lining structure for a compressed air energy storage chamber and a splicing method thereof. Background Art

[0002] In order to vigorously develop renewable energy technologies, new energy represented by wind power and photovoltaics has developed rapidly. However, due to their inherent intermittent and instability, they are difficult to connect to the grid and absorb. Therefore, energy storage is an indispensable core element in the development of new energy.

[0003] Compressed Air Energy Storage (CAES) is a new physical energy storage technology that uses compressed air as a medium to store energy and generate electricity. It can store a large amount of energy and work in coordination with the power grid to achieve stable and reliable electricity. Compressed air energy storage has attracted people's attention for its advantages such as long life, large scale, low cost, environmental friendliness, and easy maintenance. It is a new energy storage technology with great development potential. Compared with the more mature pumped storage and lithium battery energy storage, compressed air energy storage has a short construction period, long service life, many cycles and high ecological and environmental friendliness, which can well solve the problem of power supply stability of new energy power plants.

[0004] Due to the late start of compressed air energy storage technology, the relevant technical experience is insufficient. Compressed air steel lining is a sealing material commonly used in hard rock energy storage chambers. It will expand when subjected to high temperatures during the inflation and gas storage stages, while the surrounding rock cannot provide extension space for the expansion of the steel lining, which leads to certain stability problems in the sealing layer of the energy storage chamber. Therefore, the existing steel lining structure and its splicing method cannot meet the needs of compressed air energy storage chambers. Summary of the invention

[0005] The present invention provides a steel lining structure for a compressed air energy storage chamber and a splicing method thereof, which mainly solves the technical problem of thermal expansion of the existing steel lining when used as a sealing layer of the compressed air energy storage chamber, can better avoid bulging and deformation of the steel lining at high temperature, and ensure the air tightness of the chamber.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] The present invention designs a steel lining structure for a compressed air energy storage chamber, comprising a plurality of steel linings, upright steel plates, rubber strips, channel steel covers, and nodes;

[0008] Each upright steel plate is arranged on the side of each steel lining and extends into the chamber; each rubber strip is arranged on the side of each upright steel plate and extends into the chamber; a receiving groove is provided at the bottom of the channel steel cover, and the extended part of each upright steel plate and rubber strip is located in the receiving groove;

[0009] Multiple steel linings, upright steel plates, rubber strips, and channel steel covers are spliced ​​along the cross-section direction of the chamber to form a steel lining section;

[0010] Multiple steel lining segments are sequentially spliced ​​along the axial direction of the chamber through multiple nodes to form a steel lining structure that matches the shape of the inner wall of the chamber.

[0011] As a preferred embodiment, the cross-section of the accommodating groove is trough-shaped, the cover wall of the channel steel cover is at right angles to the cover bottom, the inner width of the channel steel cover is equal to the width of the inner walls of the two adjacent upright steel plates, and the two adjacent upright steel plates and the rubber strip sandwiched between them are all located in the accommodating groove.

[0012] As a preferred embodiment, the upright steel plates include axial steel plates and annular steel plates, the rubber strips include axial rubber strips and annular rubber strips, and the channel steel covers include axial channel steel covers and annular channel steel covers; the axial steel plates, axial rubber strips, and axial channel steel covers are all arranged on the axial side of the steel lining along the axial direction of the chamber, and the annular steel plates, annular rubber strips, and annular channel steel covers are all arranged on the annular side of the steel lining along the cross-sectional direction of the chamber.

[0013] Furthermore, the lengths of the axial rubber strip and the axial channel steel cover are both shorter than the length of the axial steel plate, and the lengths of the annular rubber strip and the annular channel steel cover are both shorter than the length of the annular steel plate.

[0014] As a preferred solution, the node includes a cross-shaped groove cover plate and a cross-shaped rubber block. The cross-shaped groove cover plate is located above the cross-shaped rubber block. The cross-shaped groove cover plate is respectively connected to the axial channel steel cover and the annular channel steel cover. The cross-shaped rubber block is respectively connected to the axial rubber strip and the annular rubber strip.

[0015] As a preferred solution, the cross-shaped groove cover plate is respectively connected to the axial channel steel cover and the annular channel steel cover by welding.

[0016] As a preferred solution, the cross-shaped rubber block is respectively connected to the axial rubber strip and the annular rubber strip by welding.

[0017] The present invention also designs a method for splicing a steel lining structure for a compressed air energy storage chamber, comprising the following steps:

[0018] Four upright steel plates are arranged on the four sides of the steel lining, and the four upright steel plates extend into the chamber;

[0019] A rubber strip is arranged between two adjacent upright steel plates, and the two upright steel plates and the rubber strip sandwiched therebetween are fixed with a channel steel cover, so that the steel lining, the upright steel plates, the rubber strip and the channel steel cover form a steel lining section;

[0020] Four adjacent steel lining segments are spliced ​​through nodes to form a steel lining structure that matches the shape of the inner wall of the chamber.

[0021] The present invention has the following advantages:

[0022] 1. Rubber strips are stuffed between the steel liners and connected through channel steel covers, which provide space for the steel liners to expand due to heat during the inflation and gas storage stages, thus avoiding bulging and deformation of the steel liners;

[0023] 2. There are fewer welding seams between the sealing layers, the integrity is stronger, and the air tightness of the chamber is better;

[0024] 3. There is no direct contact between the steel linings, which avoids the possibility of expansion and cracking of the traditional steel lining welding seams;

[0025] 4. The node part and other parts of the steel lining are constructed separately, and the steel lining is welded in blocks, which reduces the construction difficulty and cost, and is also conducive to the later maintenance and replacement of the entire steel lining.

[0026] Therefore, the present invention can solve the technical problem of thermal expansion when the existing steel lining is used as the sealing layer of the compressed air energy storage chamber, can better prevent the steel lining from bulging and deforming at high temperature, and ensure the air tightness of the chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the cross section of the energy storage chamber;

[0028] Figure 2 This is a partial structural diagram of the energy storage chamber;

[0029] Figure 3 This is a schematic diagram of the splicing of four steel liners;

[0030] Figure 4 for Figure 3 Schematic diagram of the decomposition of

[0031] Figure 5 It is a three-dimensional schematic diagram of the circumferential section of two steel liners;

[0032] Figure 6 It is a schematic plan view of the circumferential section of two steel liners;

[0033] Figure 7 It is the assembly diagram of the node;

[0034] Figure 8 It is a schematic diagram of the node decomposition;

[0035] In the figure: 1-steel lining, 2-upright steel plate (21-axial steel plate, 22-annular steel plate), 3-channel steel cover (30-accommodating groove, 31-axial channel steel cover, 32-annular channel steel cover), 4-rubber strip (41-axial rubber strip, 42-annular rubber strip), 5-concrete lining, 6-backfill concrete, 7-sprayed concrete, 8-anchor rod, 9-node (91-cross-shaped channel cover, 92-cross-shaped rubber block). DETAILED DESCRIPTION

[0036] In order to facilitate ordinary technicians in the field to understand and implement the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the implementation examples described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] The present invention relates to a steel lining structure for a compressed air energy storage chamber and a splicing method thereof, which mainly aims to solve the technical problem of thermal expansion of the existing steel lining when used as a sealing layer of the compressed air energy storage chamber, and can better avoid bulging and deformation of the steel lining at high temperature and ensure the air tightness of the chamber.

[0038] The present invention designs a steel lining structure for a compressed air energy storage chamber, comprising a plurality of steel linings 1, upright steel plates 2, rubber strips 4, channel steel covers 3, and nodes 9; each upright steel plate 2 is arranged on the side of each steel lining 1 and extends to the interior of the chamber; each rubber strip 4 is respectively arranged on the side of each upright steel plate 2 and extends to the interior of the chamber; a receiving groove 30 is provided at the bottom of the channel steel cover 3, and the extended part of each upright steel plate 2 and rubber strip 4 is located in the receiving groove 30; a plurality of steel linings 1, upright steel plates 2, rubber strips 4, and channel steel covers 3 are spliced ​​along the cross-sectional direction of the chamber to form a steel lining segment; a plurality of steel lining segments are spliced ​​along the axial direction of the chamber in turn through a plurality of nodes 9 to form a steel lining structure matching the shape of the inner wall of the chamber.

[0039] The cross-section of the accommodating groove 30 is trough-shaped, the cover wall of the channel steel cover is at right angles to the cover bottom, the inner width of the channel steel cover is equal to the width of the inner walls of the two adjacent upright steel plates 2, and the two adjacent upright steel plates 2 and the rubber strip sandwiched therebetween are all located in the accommodating groove 30.

[0040] The upright steel plate 2 includes an axial steel plate 21 and an annular steel plate 22, the rubber strip includes an axial rubber strip 41 and an annular rubber strip 42, and the channel steel cover includes an axial channel steel cover 31 and an annular channel steel cover 32; the axial steel plate 21, the axial rubber strip 41, and the axial channel steel cover 31 are all arranged on the axial side of the steel lining 1 along the axial direction of the chamber, and the annular steel plate 22, the annular rubber strip 42, and the annular channel steel cover 32 are all arranged on the annular side of the steel lining 1 along the cross-sectional direction of the chamber.

[0041] The lengths of the axial rubber strip 41 and the axial channel steel cover 31 are both shorter than the length of the axial steel plate 21 , and the lengths of the annular rubber strip 42 and the annular channel steel cover 32 are both shorter than the length of the annular steel plate 22 .

[0042] The node includes a cross-shaped groove cover plate 91 and a cross-shaped rubber block 92. The cross-shaped groove cover plate 91 is located above the cross-shaped rubber block 92. The cross-shaped groove cover plate 91 is connected to the axial channel steel cover 31 and the annular channel steel cover 32 respectively. The cross-shaped rubber block 92 is connected to the axial rubber strip 41 and the annular rubber strip 42 respectively. The cross-shaped groove cover plate 91 is connected to the axial channel steel cover 31 and the annular channel steel cover 32 respectively by welding. The cross-shaped rubber block 92 is connected to the axial rubber strip 41 and the annular rubber strip 42 respectively by welding.

[0043] The present invention also designs a method for splicing a steel lining structure for a compressed air energy storage chamber, comprising the following steps:

[0044] Four upright steel plates 2 are arranged on the four sides of the steel lining 1, and the four upright steel plates 2 extend toward the interior of the chamber;

[0045] A rubber strip is arranged between two adjacent upright steel plates 2, and the two upright steel plates 2 and the rubber strip sandwiched therebetween are fixed with a channel steel cover, so that the steel lining 1, the upright steel plates 2, the rubber strip and the channel steel cover form a steel lining section;

[0046] Four adjacent steel lining segments are spliced ​​through nodes to form a steel lining structure that matches the shape of the inner wall of the chamber.

[0047] It should be understood that the specific order or hierarchy of steps in the process disclosed by the present invention is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims provide the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0048] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0049] like Figure 1As shown, the compressed air energy storage chamber includes anchor rods 8, shotcrete 7, backfill concrete 6, concrete lining 5, steel lining 1, rubber strips 4, channel steel cover 3, and nodes 9. The compressed air energy storage chamber is built in a rock formation with good rock mass strength and integrity. The steel lining 1 is used to seal the compressed air energy storage chamber. The rubber strips 4 are filled between the steel linings 1, and the channel steel cover 3 is covered for welding. During the chamber inflation and gas storage stage, the steel lining 1 as a sealing layer will expand to a certain extent under the influence of high temperature, and the structure volume will increase. The rubber strips 4 between the steel linings 1 will shrink due to the expansion and compression of the steel material, providing a good extension space for the expansion and deformation of the steel lining, and avoiding the expansion and bulging deformation of the steel lining due to heat.

[0050] like Figure 2 , 3 As shown, the steel lining 1 and the channel steel cover 3 are both made by casting.

[0051] like Figure 2 As shown, the steel lining 1 is a steel plate after bending, which is grouped into six pieces, and a rubber strip is inserted in the contact position to form a complete cylindrical shape, and is welded and integrated by the slot cover plate. Each steel lining 1 has a longer circumferential edge and a shorter axial edge, and a vertical steel plate is welded on each edge according to the edge shape of the steel lining. The steel lining 1 is a rectangle as a whole, and there are vertical steel plates 2 with a height of 10cm and a thickness of 0.3cm on the four sides, and the inner and outer corners of the vertical steel plates 2 are all right angles. There is no direct contact between the steel liners. The steel lining is formed by welding the adjacent vertical steel plates and the slot steel cover to form a whole covering the entire compressed air energy storage chamber, thereby achieving a sealing effect.

[0052] like Figure 2 , 3 As shown, when the steel lining 1 is laid out, its long side should be consistent with the axial direction of the compressed air energy storage chamber. After splicing, the length of the upper node is calculated. The sum of the long side lengths of the steel lining 1 is roughly the same as the axial length of the chamber, and the short side length is roughly the same as the circumference of the chamber section. Each length of the chamber column is formed by six pieces of steel lining 1 laid in a circumferential direction. Multiple sections of the column are axially spliced ​​through nodes to obtain a complete air storage chamber.

[0053] like Figure 3 , 4 As shown, the radial and circumferential weld seams between the steel linings 1 are filled with the rubber strips 4, which are installed in the form of thin sheets and fit the four sides of the steel lining, and the surface shape is consistent with the circumferential and axial sides of the steel lining 1, and the length is between the nodes. Rubber strips 4 are used to fill between multiple steel linings 1, and the surface shape of the rubber strips 4 fits the side of the steel lining, with a thickness of about 3m, and the length should be reduced by the space of the cross-shaped rubber blocks 92 in the nodes 9 at both ends.

[0054] like Figure 4As shown, the channel steel cover 3 is long strip, with a trough-shaped cross section, the cover wall and the cover bottom are at right angles, and the inner width of the cover is the distance between the inner walls of two adjacent upright steel plates 2. The channel steel cover 3 can accommodate the two adjacent upright steel plates 2 and the rubber strip 4 sandwiched between them. The channel steel cover 3 used for axial welding is a straight strip; the channel steel cover 3 used for circumferential welding is processed from a straight strip to a round strip on site, and a small opening is left at the bottom to weld with the axial channel steel cover 3. The above channel steel covers are all installed in the center of the edge of the steel liner, and a length of about 10 cm is left on both sides from the edge to leave space for the installation of the node 9. The top of the cover wall on both sides of the channel steel cover is welded to the bottom of the inner wall of the upright steel plate of the steel liner.

[0055] like Figure 4 As shown, rubber strips 4 are filled between steel linings 1 as sealing materials, and the steel linings 1 are welded together by adjacent upright steel plates 2 and channel steel covers 3 to form a whole covering the entire compressed air energy storage chamber, thereby achieving a sealing effect.

[0056] like Figures 5 to 8 As shown, the node 9 is located at the connection of multiple steel lining steel plates spliced ​​together, and the node includes a cross-shaped rubber block 92 and a cross-shaped groove cover plate 91 for connecting the circumferential and longitudinal rubber strips and the channel steel cover. The cross-shaped rubber block 92 is composed of two cross-shaped cross-shaped rubber strips. The bottom of the cross-shaped groove cover plate 91 is provided with a cross-shaped cross groove, the cover wall and the cover bottom are at right angles, and the inner width of the cover is equal to the width of the inner wall of the two adjacent upright steel plates 2. The two adjacent upright steel plates 2 and the cross-shaped rubber block 92 sandwiched between them are all located in the cross-shaped groove.

[0057] The node 9 serves as a sealing structure at the junction of the steel lining 1, and is composed of an upper cross-shaped groove cover plate 91 and a lower cross-shaped rubber block 92, wherein the cross-shaped rubber block 92 is connected to the adjacent shaft and annular rubber strip 4 by welding, and the upper cross-shaped groove cover plate 91 is a combination of axial and longitudinal channel steel covers, which is made according to the curvature of the steel lining connection and is cross-shaped as a whole. It is connected to the adjacent shaft and annular groove cover plate 3 by welding, and the top of its cover wall is welded to the inner wall of the upright steel plate of the steel lining and the bottom of the steel substrate.

[0058] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A steel lining structure for a compressed air energy storage chamber, characterized in that: It includes multiple steel liners, upright steel plates, rubber strips, channel steel covers, and nodes; Each upright steel plate is arranged on the side of each steel lining and extends into the chamber; each rubber strip is arranged on the side of each upright steel plate and extends into the chamber; a receiving groove is provided at the bottom of the channel steel cover, and the extended part of each upright steel plate and rubber strip is located in the receiving groove; Multiple steel linings, upright steel plates, rubber strips, and channel steel covers are spliced ​​along the cross-section direction of the chamber to form a steel lining section; Multiple steel lining segments are sequentially spliced ​​along the axial direction of the chamber through multiple nodes to form a steel lining structure that matches the shape of the inner wall of the chamber.

2. A steel lining structure for a compressed air energy storage chamber according to claim 1, characterized in that: The cross-section of the accommodating groove is trough-shaped, the cover wall of the channel steel cover is at right angles to the cover bottom, the inner width of the channel steel cover is equal to the width of the inner walls of the two adjacent upright steel plates, and the two adjacent upright steel plates and the rubber strip sandwiched between them are all located in the accommodating groove.

3. A steel lining structure for a compressed air energy storage chamber according to claim 2, characterized in that: The upright steel plates include axial steel plates and annular steel plates, the rubber strips include axial rubber strips and annular rubber strips, and the channel steel covers include axial channel steel covers and annular channel steel covers; the axial steel plates, axial rubber strips, and axial channel steel covers are all arranged on the axial side of the steel lining along the axial direction of the chamber, and the annular steel plates, annular rubber strips, and annular channel steel covers are all arranged on the annular side of the steel lining along the cross-sectional direction of the chamber.

4. A steel lining structure for a compressed air energy storage chamber according to claim 3, characterized in that: The lengths of the axial rubber strip and the axial channel steel cover are both shorter than the length of the axial steel plate, and the lengths of the circumferential rubber strip and the circumferential channel steel cover are both shorter than the length of the circumferential steel plate.

5. A steel lining structure for a compressed air energy storage chamber according to claim 4, characterized in that: The node comprises a cross-shaped groove cover plate and a cross-shaped rubber block. The cross-shaped groove cover plate is located above the cross-shaped rubber block. The cross-shaped groove cover plate is respectively connected to the axial channel steel cover and the annular channel steel cover. The cross-shaped rubber block is respectively connected to the axial rubber strip and the annular rubber strip.

6. A steel lining structure for a compressed air energy storage chamber according to claim 5, characterized in that: The cross-shaped slot cover plate is respectively connected to the axial channel steel cover and the annular channel steel cover by welding.

7. A steel lining structure for a compressed air energy storage chamber according to claim 5, characterized in that: The cross-shaped rubber block is respectively connected with the axial rubber strip and the annular rubber strip by welding.

8. A method for splicing a steel lining structure for a compressed air energy storage chamber, characterized in that: The following steps are included: Four upright steel plates are arranged on the four sides of the steel lining, and the four upright steel plates extend into the chamber; A rubber strip is arranged between two adjacent upright steel plates, and the two upright steel plates and the rubber strip sandwiched therebetween are fixed with a channel steel cover, so that the steel lining, the upright steel plates, the rubber strip and the channel steel cover form a steel lining section; Four adjacent steel lining segments are spliced ​​through nodes to form a steel lining structure that matches the shape of the inner wall of the chamber.

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