Composite structure mass block for gravity energy storage and rapid production method thereof

Abstract

The invention discloses a composite structure mass block for gravity energy storage and a rapid production method of the composite structure mass block. The composite structure mass block comprises a solidified muck core, a cement bonding layer, a stainless steel shell and a concrete bottom plate. The solidified muck core is of a cuboid structure which is horizontally and transversely arranged, stainless steel shells are vertically arranged on the side faces of the periphery of the solidified muck core in an aligned mode, the stainless steel shells and the corresponding side faces of the solidified muck core are arranged in a spaced mode, and the upper end and the lower end of each stainless steel shell are horizontally turned towards the direction of the solidified muck core to form a C shape. A cement bonding layer is filled between the solidified muck core and the stainless steel shell, and the gap between the stainless steel shell and the solidified muck core is completely filled through the cement bonding layer; a concrete bottom plate is horizontally arranged on the lower surface of the solidified muck core, a weight adjusting cavity is formed in the middle of the upper surface of the solidified muck core in an embedded mode, a plurality of through long hollow channels are formed in the upper surface of the solidified muck core relative to the periphery of the weight adjusting cavity in an embedded mode, and then the composite structure mass block is obtained after maintenance and weight compensation of the weight adjusting cavity. The manufacturing efficiency of the gravity energy storage mass block is improved.

Description

Technical Field

[0001] The invention relates to the technical field of large-scale counterweight block manufacturing, and in particular to a composite structure mass block for gravity energy storage and a rapid production method thereof. Background Art

[0002] Due to the transformation of the global energy structure, gravity energy storage technology has gradually emerged in the field of energy storage in recent years. Gravity energy storage refers to the conversion of electrical energy into potential energy through electric motors and storage, and release and convert it into electrical energy when needed. It has the advantages of long life, high efficiency, low cost, environmental protection and safety. Compared with pumped storage, gravity energy storage is more flexible in site selection and does not rely on water sources and terrain; compared with lithium battery energy storage, gravity energy storage has lower cost per kilowatt-hour, longer energy storage time, higher safety, and no risk of spontaneous combustion or explosion. With the continuous advancement of technology and cost reduction, new gravity energy storage is expected to play an increasingly important role in the field of energy storage.

[0003] As the energy storage medium of the gravity energy storage system, the energy storage unit is responsible for the storage and release of energy in the system. Its design service life is usually more than 20 years. Therefore, the design and manufacturing quality level of the energy storage unit is directly related to the stability and safety of the entire system. In addition, the total energy storage capacity of the gravity energy storage system is also determined by the sum of the masses of all energy storage units in the system and the height of the energy storage structure. In view of this, the energy storage units in the gravity energy storage system must take into account stability, safety, durability and economy in the manufacturing process and the selection of materials to ensure the efficient operation of the system.

[0004] Fluidized solidified slag material is an innovative environmentally friendly building material. It uses engineering slag as raw material, adds a curing agent and undergoes process treatment to form a new type of geotechnical engineering material with high strength, low permeability and water stability. It has the advantages of good fluidity and convenient construction. It is now widely used in construction, civil engineering and other fields. Therefore, how to apply fluidized solidified slag material to the preparation of large gravity energy storage counterweights and reduce the manufacturing cost of gravity energy storage units has become a problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a composite structure mass block for gravity energy storage and a rapid production method thereof. By taking advantage of the castable and easy-to-cut properties of the fluid-solidified slag material and combining it with a rope saw cutting method, the manufacturing efficiency of the gravity energy storage mass block is effectively improved.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a composite structure mass block for gravity energy storage of the present invention, its innovation lies in: comprising a solidified slag core, a cement bonding layer, a stainless steel shell and a concrete bottom plate; the solidified slag core is a horizontally arranged rectangular parallelepiped structure, and the four sides thereof are vertically aligned with stainless steel shells matching therewith, each of the stainless steel shells is spaced apart from the corresponding side of the solidified slag core, and the upper and lower ends thereof are horizontally flanged toward the solidified slag core to form a C shape; cement bonding layers are respectively filled between the solidified slag core and each of the stainless steel shells, and the gap between the stainless steel shell and the corresponding side of the solidified slag core is completely filled by the cement bonding layer, and the two are tightly bonded; a concrete bottom plate is horizontally aligned on the lower surface of the solidified slag core, and a weight adjustment cavity is embedded in the middle position of the upper surface thereof, and a plurality of through hollow channels are vertically embedded in the upper surface relative to the outer sides of the weight adjustment cavity along the height direction, and then the composite structure mass block is obtained after maintenance and weight adjustment cavity filling.

[0007] Preferably, the solidified slag core is firstly poured and cured by fluidized solidified slag, and then cut by a rope saw cutting method.

[0008] Preferably, the formula of the fluidized solidified slag is as follows: 20~40 parts of sandy soil 40~70 parts of slag-like soil 5~20 parts of cement Soil solidifier 0~0.1 parts Mix with 5~20 parts of water.

[0009] Preferably, the particle size of the sand-like slag soil is ≤5mm; the particle size of the stone-like slag soil is 5mm~50mm; and the cement is PO425 cement.

[0010] Preferably, the concrete bottom plate is a rectangular structure made of C40 reinforced concrete with reinforcement and cast, and its thickness is 0.2m, and it is ensured to be aligned with the square area surrounded by the bottom ends of the four stainless steel shells, so as to protect the bottom of the solidified slag core through the concrete bottom plate.

[0011] Preferably, each of the through-length hollow channels is opened at a position 1m away from the center of the weight adjustment chamber on both sides, and its lower end extends vertically downward from the lower surface of the solidified slag core, and its upper end extends vertically from the upper surface of the solidified slag core, and then by pouring cement mortar in the through-length hollow channel, a rigid connection is generated between the concrete base plate and the solidified slag core.

[0012] Preferably, the distance between each of the stainless steel shells and the corresponding side surface of the solidified slag core is 20 mm, and ensure that the side surface of each of the stainless steel shells away from the solidified slag core is arranged in the same vertical plane as the corresponding side surface of the concrete bottom plate.

[0013] Preferably, the weight adjustment chamber is a vertically arranged cylindrical chamber with a volume of 0.025m 3 And ensure that its supplementary weight range is 50kg.

[0014] The invention discloses a rapid production method of a composite structure mass block for gravity energy storage, which is innovative in that it comprises the following steps: (1) Pretreatment of the pouring area: Using the length and width of the composite structure mass block to be produced as the modulus, use bricks and stones to build the pouring area, and level the bottom of the pouring area; then lay several concrete base plates in a matrix and align them horizontally at the bottom of the pouring area, and ensure that the several concrete base plates are spliced ​​into a rectangle that matches the bottom of the pouring area; (2) Fluidized solidified soil pouring: Fluidized solidified soil is poured in the pouring area, and a tamping machine is used to compact the soil once every 1m of pouring height. When pouring to the layer where the weight-adjusting cavity is located, a solid cylinder is vertically supported at the predetermined position of the weight-adjusting cavity relative to each composite structure mass block, and it is necessary to ensure that the upper surface of the solid cylinder is in the same horizontal plane as the top pouring layer, so as to serve as the weight-adjusting cavity in the later stage. (3) Curing: After pouring and compaction, cover and cure it for 3 days at a curing temperature ≥5°C, and then remove the mold to obtain a whole block of solidified slag core; (4) Cutting and drilling: Based on the principle that the length and width of each composite structure mass block are designed to shrink by 20 mm, the whole block of solidified slag core is cut into small blocks of solidified slag cores of the same size in the casting area using a rope saw cutting method, and then a drilling machine is used to drill holes at the preset position of the through-length hollow channel of each solidified slag core; (5) Shell formwork: Formwork is performed around the solidified slag core, and four stainless steel shells are vertically aligned and inserted into the interlayer between the mold and the corresponding side of the solidified slag core, and it is necessary to ensure that each stainless steel shell is spaced from the corresponding side of the solidified slag core; (6) Secondary pouring: pouring cement slurry into the reserved gap between each stainless steel shell and the solidified slag core to form a cement bonding layer; (7) Curing and demolding: After the secondary pouring is completed, it is covered and cured for 2 days in an environment with a curing temperature ≥ 5°C, and then the mold is removed to obtain the semi-finished composite structure mass block; (8) Weight adjustment: The semi-finished composite structure mass block is hoisted onto a floor scale for weighing, and then filled with concrete through the weight adjustment cavity according to the set weight, and then cured again to obtain the composite structure mass block.

[0015] Beneficial effects of the present invention: (1) The present invention effectively improves the manufacturing efficiency of the gravity energy storage mass block by combining the castable and easy-to-cut properties of the fluid solidified slag material with the rope saw cutting method; (2) The present invention uses cement slurry to tightly bond the stainless steel shell to the solidified slag core, which greatly improves the surface flatness and rigidity of the gravity energy storage mass block, avoids slag falling and powdering on the surface of the solidified slag material, and increases the service life of the gravity energy storage mass block; (3) The main counterweight of the present invention is construction waste soil, which is cheap and easy to obtain compared to building materials such as concrete. It can also generate further benefits when combined with earthwork construction, greatly reducing the total cost of gravity energy storage mass block construction and improving the competitiveness of gravity energy storage in the energy market. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The figure is a schematic diagram of the structure of a composite structural mass block for gravity energy storage according to the present invention.

[0018] Among them, 1-solidified slag core; 2-cement bonding layer; 3-stainless steel shell; 4-concrete bottom plate; 5-through-length hollow channel; 6-weight adjustment chamber. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below through specific implementation methods.

[0020] The composite structure mass block for gravity energy storage of the present invention comprises a solidified slag core 1, a cement bonding layer 2, a stainless steel shell 3 and a concrete bottom plate 4; Figure 1 As shown, the solidified slag core 1 is a horizontally arranged rectangular parallelepiped structure, and is firstly poured and cured by fluidized solidified slag, and then cut by a rope saw cutting method.

[0021] The formula of the fluidized solidified slag of the present invention is composed of the following components in parts by weight: 20~40 parts of sandy soil 40~70 parts of slag-like soil 5~20 parts of cement Soil solidifier 0~0.1 parts Mix with 5~20 parts of water.

[0022] The particle size of the sand-like slag soil is ≤5mm; the particle size of the stone-like slag soil is 5mm-50mm; and the cement is PO425 cement. The invention obtains the sand-like slag soil and the stone-like slag soil by recycling, crushing and two-stage screening of the engineering slag soil, thereby ensuring the minimum amount of small-size particles in the slag soil and ensuring that the solidified slag soil is sufficiently dense.

[0023] The present invention also vertically aligns and provides stainless steel shells 3 matching the solidified slag core 1 on the four sides thereof. Figure 1 As shown, each stainless steel shell 3 is spaced apart from the corresponding side of the solidified slag core 1, and its upper and lower ends are horizontally flanged toward the solidified slag core 1 to form a C shape; a cement bonding layer is filled between the solidified slag core 1 and each stainless steel shell 3, and the gap between the stainless steel shell 3 and the corresponding side of the solidified slag core 1 is completely filled by the cement bonding layer, and the two are tightly bonded; a concrete bottom plate 4 is also horizontally aligned on the lower surface of the solidified slag core 1, and a weight adjustment cavity 6 is embedded in the middle position of its upper surface, and several through-length hollow channels 5 are vertically embedded in the height direction on the upper surface relative to the outer side of the weight adjustment cavity 6, and then after maintenance and weight adjustment cavity 6 reweighting, a composite structure mass block is obtained. Among them, the weight adjustment cavity 6 is a vertically arranged cylindrical shape, and its volume is 0.025m 3 And ensure that its supplementary weight range is 50kg.

[0024] like Figure 1 As shown, the concrete bottom plate 4 is a rectangular structure made of C40 reinforced concrete with reinforcement and cast, and its thickness is 0.2m, and it is ensured to be aligned with the square area surrounded by the bottom ends of the four stainless steel shells 3, so that the bottom of the solidified slag core 1 is protected by the concrete bottom plate 4, and the solidified slag core 1 can be driven to move together by external power.

[0025] like Figure 1 As shown, each through-length hollow channel 5 is opened at a position 1m away from the center of the weight adjustment chamber 6 on both sides, and its lower end extends vertically downward from the lower surface of the solidified slag core 1, and its upper end extends vertically from the upper surface of the solidified slag core 1, and then by pouring cement mortar in the through-length hollow channel 5, a rigid connection is generated between the concrete base plate 4 and the solidified slag core 1.

[0026] like Figure 1As shown, the distance between each stainless steel shell 3 and the corresponding side of the solidified slag core 1 is 20 mm, and it is ensured that the side of each stainless steel shell 3 away from the solidified slag core 1 is arranged in the same vertical plane as the corresponding side of the concrete bottom plate 4.

[0027] A rapid production method of a composite structure mass block for gravity energy storage according to the present invention, such as Figure 1 As shown, the following steps are included: (1) Pretreatment of the pouring area: Using the length and width of the composite structure mass block to be produced as the modulus, use bricks and stones to build the pouring area, and level the bottom of the pouring area; then, lay several concrete bottom plates 4 in a matrix and align them horizontally at the bottom of the pouring area, and ensure that the several concrete bottom plates 4 are spliced ​​into a rectangle that matches the bottom of the pouring area.

[0028] (2) Fluidized solidified soil pouring: Fluidized solidified soil is poured in the pouring area, and a rammer is used to compact it once every 1m of pouring height. When pouring to the layer where the weight-adjusting cavity 6 is located, a solid cylinder is vertically supported at the predetermined position of the weight-adjusting cavity 6 relative to each composite structure mass block, and it is necessary to ensure that the upper surface of the solid cylinder is in the same horizontal plane as the top pouring layer, so as to serve as the weight-adjusting cavity 6 in the later stage.

[0029] The mass block is generally transported by a rail trolley of a gravity energy storage system. Therefore, the balance of the center of gravity of the mass block can not only ensure the safety of the mass block during movement, but also further ensure that the hydraulic system of the rail trolley is subjected to average force, thereby preventing the hydraulic cylinder from overloading and exploding. Therefore, the weight adjustment cavity 6 of the present invention needs to be set in the center position to ensure the balance of the center of gravity of the composite structure mass block.

[0030] (3) Curing: After pouring and compaction, cover it with film and cure it for 3 days in an environment with a curing temperature ≥5℃. After demolding, a whole block of solidified slag core can be obtained.

[0031] (4) Cutting and drilling: Based on the principle that the length and width of each composite structure mass block are designed to shrink by 20 mm, a rope saw cutting method is used to cut the entire block of solidified slag core into small blocks of solidified slag cores 1 of the same size in the casting area, and then a drilling machine is used to drill holes at the preset positions of the through-length hollow channel 5 of each solidified slag core 1.

[0032] (5) Shell formwork: Formwork is performed around the solidified slag core 1, and four stainless steel shells 3 are vertically aligned and inserted into the interlayer between the mold and the corresponding side of the solidified slag core 1, and it is necessary to ensure that each stainless steel shell 3 is spaced apart from the corresponding side of the solidified slag core 1.

[0033] (6) Secondary pouring: pouring cement slurry into the reserved gap between each stainless steel shell 3 and the solidified slag core 1 to form a cement bonding layer 2.

[0034] The mass block for gravity energy storage not only needs to have sufficient gravity source to realize the energy conversion between systems, but its service life and apparent quality are also extremely important to the overall operation of the gravity energy storage system. After the solidified slag material is solidified, a certain amount of dust will fall off on the surface due to production mixing or climate reasons. Therefore, the stainless steel shell 3 surrounding solution adopted by the present invention not only effectively avoids the dust problem and improves the service life of the composite structure mass block, but also improves the surface flatness of the composite structure mass block and improves the visual recognition accuracy of gravity energy storage.

[0035] (7) Curing and demolding: After the secondary pouring is completed, it is covered and cured for 2 days in an environment with a curing temperature ≥ 5°C, and then the mold is removed to obtain the semi-finished composite structure mass block.

[0036] (8) Weight adjustment: The semi-finished composite structure mass block is hoisted onto a floor scale for weighing, and then filled with concrete through the weight adjustment cavity 6 according to the set weight, and then cured again, thereby obtaining the composite structure mass block.

[0037] The present invention first casts fluidized solidified slag over a large area and then uses a rope saw to cut the mass block production plan. The output of the plan can be flexibly designed according to the scale of the gravity energy storage project, effectively shortening the grid connection time of the gravity energy storage project and reducing the operating cost of the gravity energy storage project.

[0038] The present invention adopts the method of weighing and supplementing weight, which can bring the following benefits: 1) It can ensure that the composite structure mass block meets the design quality requirements with high precision, so that the power of each composite structure mass block is approximately the same when running to generate electricity, ensuring the quality of electric energy and avoiding a large impact on power generation equipment such as motors; 2) The solidification of slag needs to go through a series of complex chemical reactions, and a large amount of water is consumed in the process. By weighing and re-weighing, the mass loss rate of the mass block within a certain time can be mastered, abnormal mass blocks can be quickly discovered, and a reference can be provided for the subsequent production of mass blocks. Embodiment 1

[0039] A rapid production method of a composite structure mass block for gravity energy storage according to the present invention, such as Figure 1 As shown, the following steps are included: (1) Pretreatment of the pouring area: With the length and width dimensions of 3.5×1.236m as the modulus, use bricks and stones to build a pouring area with a length, width and height of 87.5×30.9×2.2m, and level the bottom of the pouring area; then, lay several concrete bottom plates 4 with a length, width and height of 3.5×1.236×0.2m in a matrix and horizontally align at the bottom of the pouring area, and ensure that the several concrete bottom plates 4 are spliced ​​into a rectangle that matches the bottom of the pouring area.

[0040] (2) Fluidized solidified soil pouring: Fluidized solidified soil is poured in the pouring area, and a rammer is used to compact the soil once every 1m of pouring height. When pouring to the layer where the predetermined position of the weight-adjusting cavity 6 is located, a solid cylinder is vertically supported at the predetermined position of the weight-adjusting cavity 6 relative to each composite structure mass block.

[0041] (3) Curing: After pouring and compaction, it is covered with film and cured for 3 days at a curing temperature of 20°C. After demolding, a whole block of solidified slag core can be obtained.

[0042] (4) Cutting and drilling: Based on the principle that the length and width of each composite structure mass block are designed to shrink by 20 mm, a rope saw cutting method is used to cut the entire block of solidified slag core into solidified slag cores 1 with a length, width and height of 3.48×1.216m×2.0m in the casting area. Then, a drilling machine is used to drill holes on the upper surface of each solidified slag core 1 at a distance of 1m on both sides of the center of the weight adjustment cavity 6 and 0.3m from the edge, thereby forming a through-length hollow channel 5.

[0043] (5) Shell formwork: Formwork is performed around the solidified slag core 1, and four stainless steel shells 3 are vertically aligned and inserted into the interlayer between the mold and the corresponding sides of the solidified slag core 1.

[0044] (6) Secondary pouring: pouring cement slurry into the reserved gap between each stainless steel shell 3 and the solidified slag core 1 to form a cement bonding layer 2.

[0045] (7) Curing and demolding: After the secondary pouring is completed, it is covered and cured for 2 days at a curing temperature of 20°C. The mold is then removed to obtain the semi-finished composite structure mass block.

[0046] (8) Weight adjustment: The semi-finished composite structure mass block is hoisted onto a scale and weighed to 19.4 tons. The weight adjustment cavity 6 is then filled with concrete for additional weight and cured again, thereby obtaining a 20-ton composite structure mass block with a size of 3.50×1.236×2.2 m. Embodiment 2

[0047] A rapid production method of a composite structure mass block for gravity energy storage according to the present invention, such as Figure 1 As shown, the following steps are included: (1) Pretreatment of the pouring area: With the length and width dimensions of 3.5×1.236m as the modulus, use bricks and stones to build a pouring area with a length, width and height of 87.5×30.9×2.7m, and level the bottom of the pouring area; then, lay several concrete bottom plates 4 with a length, width and height of 3.5×1.236×0.2m in a matrix and horizontally align at the bottom of the pouring area, and ensure that the several concrete bottom plates 4 are spliced ​​into a rectangle that matches the bottom of the pouring area.

[0048] (2) Fluidized solidified soil pouring: Fluidized solidified soil is poured in the pouring area, and a rammer is used to compact the soil once every 1m of pouring height. When pouring to the layer where the predetermined position of the weight-adjusting cavity 6 is located, a solid cylinder is vertically supported at the predetermined position of the weight-adjusting cavity 6 relative to each composite structure mass block.

[0049] (3) Curing: After pouring and compaction, it is covered with film and cured for 3 days at a curing temperature of 20°C. After demolding, a whole block of solidified slag core can be obtained.

[0050] (4) Cutting and drilling: Based on the principle that the length and width of each composite structure mass block are designed to shrink by 20 mm, a rope saw cutting method is used to cut the entire block of solidified slag core into solidified slag cores 1 with a length, width and height of 3.48×1.216m×2.5m in the casting area. Then, a drilling machine is used to drill holes on the upper surface of each solidified slag core 1 at a distance of 1m on both sides of the center of the weight adjustment cavity 6 and 0.3m from the edge, thereby forming a through-length hollow channel 5.

[0051] (5) Shell formwork: Formwork is performed around the solidified slag core 1, and four stainless steel shells 3 are vertically aligned and inserted into the interlayer between the mold and the corresponding sides of the solidified slag core 1.

[0052] (6) Secondary pouring: pouring cement slurry into the reserved gap between each stainless steel shell 3 and the solidified slag core 1 to form a cement bonding layer 2.

[0053] (7) Curing and demolding: After the secondary pouring is completed, it is covered and cured for 2 days at a curing temperature of 20°C. The mold is then removed to obtain the semi-finished composite structure mass block.

[0054] (8) Weight adjustment: The semi-finished composite structure mass block is hoisted onto a scale and weighed to 24.1 tons. The weight adjustment cavity 6 is then filled with concrete for additional weight and cured again to obtain a 25-ton composite structure mass block with a size of 3.50×1.236×2.7 m. Embodiment 3

[0055] A rapid production method of a composite structure mass block for gravity energy storage according to the present invention, such as Figure 1 As shown, the following steps are included: (1) Pretreatment of the pouring area: With a length and width of 3.5×1.5m as the module, use bricks and stones to build a pouring area with a length, width and height of 87.5×37.5×2.7m, and level the bottom of the pouring area; then, lay several concrete bottom plates 4 with a length, width and height of 3.5×1.5×0.2m in a matrix and horizontally align at the bottom of the pouring area, and ensure that the several concrete bottom plates 4 are spliced ​​into a rectangle that matches the bottom of the pouring area.

[0056] (2) Fluidized solidified soil pouring: Fluidized solidified soil is poured in the pouring area, and a rammer is used to compact the soil once every 1m of pouring height. When pouring to the layer where the predetermined position of the weight-adjusting cavity 6 is located, a solid cylinder is vertically supported at the predetermined position of the weight-adjusting cavity 6 relative to each composite structure mass block.

[0057] (3) Curing: After pouring and compaction, it is covered with film and cured for 3 days at a curing temperature of 20°C. After demolding, a whole block of solidified slag core can be obtained.

[0058] (4) Cutting and drilling: Based on the principle that the length and width of each composite structure mass block are designed to shrink by 20 mm, the whole block of solidified slag core is cut into solidified slag cores 1 with a length, width and height of 3.48×1.48m×2.5m in the casting area by using a rope saw cutting method. Then, a drilling machine is used to drill holes on the upper surface of each solidified slag core 1 at a distance of 1m on both sides of the center of the weight adjustment cavity 6 and 0.4m from the edge, thereby forming a through-length hollow channel 5.

[0059] (5) Shell formwork: Formwork is performed around the solidified slag core 1, and four stainless steel shells 3 are vertically aligned and inserted into the interlayer between the mold and the corresponding sides of the solidified slag core 1.

[0060] (6) Secondary pouring: pouring cement slurry into the reserved gap between each stainless steel shell 3 and the solidified slag core 1 to form a cement bonding layer 2.

[0061] (7) Curing and demolding: After the secondary pouring is completed, it is covered and cured for 2 days at a curing temperature of 20°C. The mold is then removed to obtain the semi-finished composite structure mass block.

[0062] (8) Weight adjustment: The semi-finished composite structure mass block is hoisted onto a scale and weighed to 29.2 tons. The weight adjustment cavity 6 is then filled with concrete for additional weight and cured again, thereby obtaining a 30-ton composite structure mass block with a size of 3.50×1.5×2.7 m.

[0063] Beneficial effects of the present invention: (1) The present invention effectively improves the manufacturing efficiency of the gravity energy storage mass block by combining the castable and easy-to-cut properties of the fluid solidified slag material with the rope saw cutting method; (2) The present invention uses cement slurry to tightly bond the stainless steel shell 3 to the solidified slag core 1, which greatly improves the surface flatness and rigidity of the gravity energy storage mass block, avoids slagging and powdering of the surface of the solidified slag material, and increases the service life of the gravity energy storage mass block; (3) The main counterweight of the present invention is construction waste soil, which is cheap and easy to obtain compared to building materials such as concrete. It can also generate further benefits when combined with earthwork construction, greatly reducing the total cost of gravity energy storage mass block construction and improving the competitiveness of gravity energy storage in the energy market.

[0064] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering technicians in the field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the technical requirements.

Claims

1. A composite structure mass block for gravity energy storage, characterized in that: It includes a solidified slag core, a cement bonding layer, a stainless steel shell and a concrete base plate; the solidified slag core is a rectangular structure arranged horizontally, and stainless steel shells matching it are vertically aligned on the four sides thereof, each of the stainless steel shells is spaced apart from the corresponding side of the solidified slag core, and the upper and lower ends thereof are horizontally flanged toward the solidified slag core to form a C shape; cement bonding layers are respectively filled between the solidified slag core and each of the stainless steel shells, and the gap between the stainless steel shell and the corresponding side of the solidified slag core is completely filled by the cement bonding layer, and the two are tightly bonded; a concrete base plate is horizontally aligned on the lower surface of the solidified slag core, and a weight adjustment cavity is embedded in the middle position of the upper surface thereof, and a number of through-length hollow channels are vertically embedded in the upper surface thereof along the height direction relative to the outer sides of the weight adjustment cavity, so that a composite structure mass block is obtained after maintenance and weight adjustment cavity filling.

2. A composite structure mass block for gravity energy storage according to claim 1, characterized in that: The solidified slag core is firstly poured and cured by fluidized solidified slag, and then cut by combining with a rope saw cutting method.

3. A composite structure mass block for gravity energy storage according to claim 2, characterized in that: The formula of the above fluidized solidified slag is as follows: 20~40 parts of sandy soil 40~70 parts of slag-like soil 5~20 parts of cement Soil solidifier 0~0.1 parts Mix with 5~20 parts of water.

4. The composite structure mass block for gravity energy storage according to claim 3, characterized in that: The particle size of the sand-like slag soil is ≤5mm; the particle size of the stone-like slag soil is 5mm~50mm; and the cement is PO425 cement.

5. The composite structure mass block for gravity energy storage according to claim 3, characterized in that: The concrete bottom plate is a rectangular structure made of C40 reinforced concrete with reinforcement and cast, and its thickness is 0.2m. It is ensured to be aligned with the square area surrounded by the bottom ends of the four stainless steel shells, so as to protect the bottom of the solidified slag core through the concrete bottom plate.

6. The composite structure mass block for gravity energy storage according to claim 5, characterized in that: Each of the through-length hollow channels is opened at a position 1m away from the center of the weight adjustment chamber on both sides, and its lower end extends vertically downward from the lower surface of the solidified slag core, and its upper end extends vertically from the upper surface of the solidified slag core, and then by pouring cement mortar in the through-length hollow channel, a rigid connection is generated between the concrete base plate and the solidified slag core.

7. The composite structure mass block for gravity energy storage according to claim 6, characterized in that: The distance between each of the stainless steel shells and the corresponding side surface of the solidified slag core is 20 mm, and it is ensured that the side surface of each of the stainless steel shells away from the solidified slag core is arranged in the same vertical plane as the corresponding side surface of the concrete bottom plate.

8. The composite structure mass block for gravity energy storage according to claim 7, characterized in that: The weight adjustment chamber is a vertically arranged cylindrical chamber with a volume of 0.025m 3 And ensure that its supplementary weight range is 50kg.

9. A rapid production method of a composite structure mass block for gravity energy storage according to claim 8, characterized in that The following steps are involved: (1) Pretreatment of the pouring area: Using the length and width of the composite structure mass block to be produced as the modulus, use bricks and stones to build the pouring area, and level the bottom of the pouring area; then lay several concrete base plates in a matrix and align them horizontally at the bottom of the pouring area, and ensure that the several concrete base plates are spliced ​​into a rectangle that matches the bottom of the pouring area; (2) Fluidized solidified soil pouring: Fluidized solidified soil is poured in the pouring area, and a tamping machine is used to compact the soil once every 1m of pouring height. When pouring to the layer where the weight-adjusting cavity is located, a solid cylinder is vertically supported at the predetermined position of the weight-adjusting cavity relative to each composite structure mass block, and it is necessary to ensure that the upper surface of the solid cylinder is in the same horizontal plane as the top pouring layer, so as to serve as the weight-adjusting cavity in the later stage. (3) Curing: After pouring and compaction, cover and cure it for 3 days at a curing temperature ≥5°C, and then remove the mold to obtain a whole block of solidified slag core; (4) Cutting and drilling: Based on the principle that the length and width of each composite structure mass block are designed to shrink by 20 mm, the whole block of solidified slag core is cut into small blocks of solidified slag cores of the same size in the casting area using a rope saw cutting method, and then a drilling machine is used to drill holes at the preset position of the through-length hollow channel of each solidified slag core; (5) Shell formwork: Formwork is performed around the solidified slag core, and four stainless steel shells are vertically aligned and inserted into the interlayer between the mold and the corresponding side of the solidified slag core, and it is necessary to ensure that each stainless steel shell is spaced from the corresponding side of the solidified slag core; (6) Secondary pouring: pouring cement slurry into the reserved gap between each stainless steel shell and the solidified slag core to form a cement bonding layer; (7) Curing and demolding: After the secondary pouring is completed, it is covered and cured for 2 days in an environment with a curing temperature ≥ 5°C, and then the mold is removed to obtain the semi-finished composite structure mass block; (8) Weight adjustment: The semi-finished composite structure mass block is hoisted onto a floor scale for weighing, and then filled with concrete through the weight adjustment cavity according to the set weight, and then cured again to obtain the composite structure mass block.

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