Detachable weight block based on vertical shaft gravity energy storage and jacking system

Abstract

The utility model discloses a detachable weight block based on vertical shaft gravity energy storage and a jacking system. The detachable weight block comprises weight block single bodies, and two or more weight block single bodies can be in butt joint in an up-down stacking mode to form a weight block combination. Each weight block single body comprises a weight block body, the upper end of each weight block body is provided with an upper end butt joint part, the lower end of each weight block body is provided with a lower end butt joint part, and the upper end butt joint parts correspond to the lower end butt joint parts. According to the scheme, the height and the quality of the weight block are controllable, and the gravity center height and the machining and manufacturing difficulty of a single lifting weight block are reduced; the conveying process is safer and more stable while the conveying speed is increased, the burden of the conveying system is relieved, and the conveying efficiency of the whole system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gravity energy storage, and in particular relates to a detachable weight block and a jacking system based on vertical shaft gravity energy storage. Background Art

[0002] Gravity energy storage systems primarily consist of two components: energy storage and discharge. During energy storage, materials (such as heavy blocks) are lifted from a low-altitude storage bin (referred to as the lower bin) to a higher-altitude bin (referred to as the upper bin), where electrical energy is ultimately converted into the material's gravitational potential energy for temporary storage. During discharge, the material is transported from the high-altitude bin to the low-altitude bin, where a conveyor drives a generator to generate electricity, ultimately converting the gravitational potential energy into electrical energy. The heavy blocks, a relatively large mass made of a material with a specific density, act as both the object of force application and the source of gravity in the gravity energy storage system.

[0003] Vertical shaft gravity energy storage uses a vertical shaft as a channel for lifting and transporting weights. The transport system primarily handles the transportation and storage of the weights. The transport system typically includes a hoist, a transport vehicle, and the weights. The hoist (a lifting container, such as an elevator) is responsible for lifting the weights from the lower to the upper compartment and lowering them upon energy release. The transport vehicle, typically located on tracks between the upper and lower compartments, transports the weights between the hoist and the storage location.

[0004] The transport system for the lower chamber of a vertical gravity energy storage system must be highly reliable and safe to handle the immense weight of the heavy blocks. It also requires precise control capabilities to efficiently store and release energy according to power demand.

[0005] The transport system's primary influence on the installed capacity of gravity energy storage lies in the transport capacity and speed of individual weights. Without increasing the number of transport vehicles, the heavier the weights and the faster the transport speed, the greater the theoretical installed capacity of gravity energy storage. However, currently, transport vehicles have upper limits on their transport capacity and operating speed. Generally speaking, heavier weights result in slower overall transport speeds. This contradiction hinders further improvements in energy storage efficiency. Utility Model Content

[0006] The technical problem to be solved by the present invention is: to provide a detachable heavy block and jacking system based on shaft gravity energy storage, to solve the problem that the existing technology cannot achieve safety, stability and efficiency; this solution makes the height and quality of the heavy block controllable, reduces the center of gravity height and processing and manufacturing difficulty of a single lifted heavy block; while increasing the transport speed, ensures that the transport process is safer and more stable, reduces the burden on the transport system, and improves the transport efficiency of the overall system.

[0007] According to the technical solution of the present invention, the present invention provides a detachable weight block based on vertical shaft gravity energy storage, including a weight block monomer, two or more weight block monomers can be stacked up and down and connected to form a weight block assembly; the weight block monomer includes a weight block main body, the upper end of the weight block main body has an upper end docking part, and the lower end of the weight block main body has a lower end docking part, and the upper end docking part corresponds to the lower end docking part.

[0008] According to some embodiments, the upper end docking portion includes a groove located at the upper end of the weight block body, and the lower end docking portion includes a protrusion located at the lower end of the weight block body; or, the upper end docking portion includes a socket column located at the upper end of the weight block body, and the lower end docking portion includes a socket hole located at the lower end of the weight block body.

[0009] Furthermore, the upper end docking portion includes a groove located in the middle of the upper end of the weight block body, and the lower end docking portion includes a protrusion located in the middle of the lower end of the weight block body; the height of the protrusion is greater than the depth of the groove.

[0010] Furthermore, the bottom of the groove is a plane, and the bottom of the protrusion is a plane; and / or the portion of the lower end surface of the weight block body outside the protrusion is a plane.

[0011] Furthermore, the side wall of the groove has a slope or a curve, and the cross-sectional dimension of the opening above the groove is larger than the cross-sectional dimension of the bottom of the groove; the side wall of the protrusion has a slope or a curve, and the cross-sectional dimension of the upper part of the protrusion is larger than the cross-sectional dimension of the lower part of the protrusion; the side wall of the groove matches the shape of the side wall of the protrusion.

[0012] Furthermore, the upper end docking part also includes a socket column located at the upper end of the weight block main body, and the lower end docking part also includes a socket hole located at the lower end of the weight block main body; the position of the socket column in the upper end surface of the weight block main body is located within the range of the groove, and the position of the socket hole in the lower end surface of the weight block main body is located within the range of the protrusion.

[0013] Further, the height dimension of the weight block main body is equal to or smaller than the width dimension of the weight block main body.

[0014] According to the technical solution of the present invention, the present invention also provides a jacking system for detachable heavy blocks based on shaft gravity energy storage, which is arranged in the lower warehouse and / or upper warehouse of the shaft gravity energy storage system, and the heavy blocks used in the shaft gravity energy storage system are the detachable heavy blocks based on shaft gravity energy storage described in the present invention; the lower warehouse and / or upper warehouse of the shaft gravity energy storage system is provided with a transportation system, the transportation system includes a transport vehicle capable of transporting heavy blocks between the heavy block storage position and a position near the shaft; the jacking system includes a jacking device, and the jacking devices are at least two; the two jacking devices form a group and are respectively located on both sides of the transport vehicle's running path; the jacking device includes a tray and a lifting drive mechanism connected to the tray; when the heavy block monomer is placed on the transport vehicle or stacked and docked on another heavy block monomer in a matching manner, a jacking gap is formed at least on both sides below the upper heavy block monomer, the position of the tray corresponds to the jacking gap, and the thickness of the jacking gap is greater than the thickness of the tray.

[0015] Furthermore, the transport system also includes a track, the transport vehicle is located on the track, and the jacking devices are arranged on both sides of the track.

[0016] Furthermore, the jacking device is located relatively close to the shaft and relatively far away from the heavy object storage location.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0018] 1. This solution is designed from the perspective of logistics and transportation applications. The gravity energy storage heavy blocks and jacking system can continuously circulate the heavy blocks, forming a stable and uniform heavy logistics flow, ensuring the continuity of the energy storage process, reducing equipment loss and failure risks, and improving operational efficiency and stability. It is especially suitable for the lower warehouse of the shaft-type gravity energy storage system.

[0019] 2. This solution is equipped with a heavy block with a low center of gravity, a groove on the top surface, and a protrusion on the bottom surface; the low center of gravity makes it more stable and has strong anti-dumping ability during transportation and transshipment, reducing safety risks; the shape close to a regular cube is convenient for stacking and storage, improving space utilization; the reasonable length, width and height size range reduces the difficulty of production and processing and logistics costs; the socket column structure ensures the firmness and stability of the heavy block group after splicing; the splicable groove and protrusion design can adjust the height and mass of the heavy block group through assembly and disassembly according to different gravity energy storage requirements, increasing the flexibility and adaptability of the energy storage and power generation system.

[0020] 3. The mass of a single heavy block in this solution is relatively small, which reduces the force required for starting and braking the transport vehicle, reduces energy consumption, alleviates the operating pressure of the conveying system, and extends the life of the equipment; it is beneficial to the overall scheduling of the conveying system, increases the speed of the transport vehicle and shortens the response time, making the system safer, more stable and efficient.

[0021] 4. The height of a single heavy object block in this scheme is relatively low, and the height of the lower chamber and tunnel is reduced accordingly; it can reduce the demand and waste of underground space development, reduce engineering construction costs and construction difficulty, and meet the requirements of sustainable development.

[0022] 5. The heavy blocks of this solution can be stacked on each other, and the height and weight are controllable. They can flexibly meet the gravitational potential energy required for different power generation and storage, maintain ideal and stable charging and discharging efficiency, and improve the flexibility and adaptability of the system.

[0023] 6. In combination with this solution, the effective height of the shaft, as well as the number and size of lifting containers and weights, can be adjusted during the design phase according to the project and actual environmental conditions, which can better adapt to different terrain and geological conditions, improve versatility and adaptability; configure different installed capacities to meet different energy storage needs, and improve economy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a weight block monomer and a lifting device provided by the utility model.

[0025] Figure 2 It is a structural schematic diagram of the heavy object block monomers provided by the utility model during the stacking process through the jacking device.

[0026] Figure 3 It is a structural schematic diagram of the heavy object block assembly provided by the utility model after being transported into the lifting container.

[0027] Figure 4 It is a cross-sectional dimension diagram of a single weight block provided by the utility model.

[0028] Figure 5 It is a top-view dimensional drawing of a single weight block provided by the utility model.

[0029] Description of reference numerals in the accompanying drawings:

[0030] 1. Weight block body; 2. Groove; 3. Protrusion; 4. Socket column; 5. Socket hole; 6. Transport vehicle; 7. Lifting device; 8. Pallet; 9. Track; 10. Lifting container; 11. Lifting wire rope. DETAILED DESCRIPTION

[0031] The utility model provides a detachable heavy object block and jacking system based on shaft gravity energy storage, which solves the problem that the existing technology cannot achieve safety, stability and efficiency; the main purpose of the design of this scheme is to make the height and quality of the heavy object block controllable, reduce the center of gravity height and processing and manufacturing difficulty of a single lifting heavy object block; increase the transportation speed while ensuring that the transportation process is safer and more stable, reduce the burden on the transportation system, and improve the transportation efficiency of the entire system.

[0032] The present invention solves the aforementioned contradiction between the mass of the heavy blocks and the transportation efficiency. The heavy blocks are designed to be assembleable and disassembled structures. For example, the mass and height of a single heavy block are halved compared to the original heavy blocks. Moreover, the heavy block lifting system designed in the present invention can realize the scenario where a single heavy block is stored separately and multiple heavy blocks generate electricity together. While reducing the pressure on the lower warehouse transportation system and increasing the driving speed of the transport vehicle, it not only improves the safety and reliability of the lower warehouse transportation system, but also because the total mass of the multiple heavy blocks used for lifting remains unchanged, the vertical shaft gravity energy storage system of the present invention has the same energy storage efficiency as the original solution.

[0033] See also Figures 1 to 3 The present invention provides a detachable weight block based on vertical shaft gravity energy storage, including a weight block monomer, two or more weight block monomers can be stacked up and connected to form a weight block assembly. The weight block monomer includes a weight block main body 1, the upper end of the weight block main body 1 has an upper end docking portion, and the lower end of the weight block main body 1 has a lower end docking portion, and the upper end docking portion corresponds to the lower end docking portion; the shape, position, etc. of the upper end docking portion and the lower end docking portion are all correspondingly matched, so that the upper end docking portion and the lower end docking portion of the two weight block monomers can be combined. For example, according to some embodiments, the upper end docking portion includes a groove 2 located at the upper end of the weight block main body 1, and the lower end docking portion includes a protrusion 3 located at the lower end of the weight block main body 1; or according to some other embodiments, the upper end docking portion includes a socket column 4 located at the upper end of the weight block main body 1, and the lower end docking portion includes a socket hole 5 located at the lower end of the weight block main body 1.

[0034] In the preferred embodiment shown in the figure, the upper end docking portion includes a groove 2 located in the middle of the upper end of the weight block body 1, and the lower end docking portion includes a protrusion 3 located in the middle of the lower end of the weight block body 1; and the height of the protrusion 3 is greater than the depth of the groove 2. The groove 2 and the protrusion 3 are located in the middle, which means that they are at least located in the middle of the left and right directions of the weight block body 1, for example Figure 5 As shown, the groove 2 (and the protrusion 3) are located in the middle of the front, rear, left and right directions of the end face of the weight block main body 1. The groove 2 and the protrusion 3 are formed on the upper and lower end faces of the weight block main body 1. Taking the protrusion 3 as an example, the protrusion 3 protrudes downward from the portion of the lower end face of the weight block main body 1 outside the protrusion 3. The height of this portion protruding from the end face is called the height of the protrusion 3; the depth of the groove 2 is defined in the same way. Therefore, when the protrusion 3 of a single weight block is placed on a plane or placed in the groove 2, the weight block has gaps on at least the left and right sides below (referred to as lifting gaps in this article). The gaps reserved on both sides can be used to lift the weight block upward (i.e., lift it), thereby enabling splicing and assembly, and also facilitating the separation and disassembly of the weight block assembly.

[0035] More specifically, the bottom of the groove 2 is flat, and the bottom of the protrusion 3 is flat, thereby ensuring stability when stacked. The lower end surface of the weight block body 1 outside the protrusion 3 is flat, that is, the part that supports the weight block during lifting is flat, to ensure stability during lifting.

[0036] The sidewalls of the groove 2 have an inclined or curved surface, and the cross-sectional dimensions of the upper opening of the groove 2 are larger than the cross-sectional dimensions of the bottom of the groove 2. The sidewalls of the protrusion 3 also have an inclined or curved surface, and the cross-sectional dimensions of the upper portion of the protrusion 3 are larger than the cross-sectional dimensions of the lower portion of the protrusion 3. As a result, the longitudinal cross-section of the groove 2 and the protrusion 3 on the weight block body 1 is, for example, trapezoidal. The sidewalls of the groove 2 match the shape of the sidewalls of the protrusion 3, so that the two are positioned stably and accurately when combined.

[0037] Furthermore, the upper end docking portion also includes a socket column 4 located at the upper end of the weight block main body 1, and the lower end docking portion also includes a socket hole 5 located at the lower end of the weight block main body 1. The socket column 4 is, for example, a steel rod embedded and fixed in the weight block main body 1 and extending upward, and the socket hole 5 is a blind hole opening downward. The socket column 4 and the socket hole 5 match in size and setting position, so that they can be matched and plugged in. The position of the socket column 4 in the upper end face of the weight block main body 1 is located within the range of the groove 2, and the position of the socket hole 5 in the lower end face of the weight block main body 1 is located within the range of the protrusion 3, so that the socket column 4 will not affect the space of the lifting gap on both sides. Preferably, for example, the positions of the socket column 4 and the socket hole 5 correspond to the positions close to the edges in the bottom plane of the groove 2 and the protrusion 3, and are multiple points evenly distributed circumferentially.

[0038] Preferably, the height of the weight block body 1 (excluding the height of the socket column 4) is equal to or less than its width. Specifically, the weight block body 1 can resemble a cube, a relatively smaller rectangular parallelepiped, or other smaller prisms or cylinders. A cube structure is preferred for ease of production and improved storage space utilization. In this solution, the center of each weight block is low, making it easier to transport and less likely to tip over.

[0039] See also Figure 4 、 Figure 5In a specific embodiment, a cube-shaped weight block body is used, with a sharp edge and neat shape, and its design is a groove and protrusion structure that can be assembled and disassembled in the vertical direction. The mass of a single weight block unit is 20t to 80t, and the overall net height is 2m to 6m. The width dimension B1 of the lower end surface of the weight block body 1 outside the protrusion 3 is greater than the width dimension B2 of the upper end surface of the upper weight block body 1 outside the groove 2, for example, B1 = B2 + 5mm to 10mm; due to the wider size of B1, the contact area between the bottom surface of both sides of the weight block and the jacking device is large, which is more conducive to the stability of the weight block lifting. The height h1 of the protrusion 3 is greater than the depth h2 of the groove 2, for example, h1 = h2 + 5mm to 10mm. The cross-sections of the protrusion 3 and the groove 2 are isosceles trapezoidal (or rectangular), and the side walls of the protrusion 3 and the groove 2 have the same outward inclination angle θ, and θ>90° (or θ=90°), so that the weight blocks can be precisely butted together when assembled and spliced. Four socket steel structures are embedded in the top surface of the weight block body 1, evenly distributed in the groove 2 on the upper surface of the weight block body 1 (for example, at the four corners), serving as socket columns 4; accordingly, four socket holes 5 are provided at the protrusion 3 on the bottom surface of the weight block body 1 corresponding to the structural positions of the socket columns 4. This preferred solution can effectively prevent large-scale shaking of the weight blocks after assembly.

[0040] In view of the design of the detachable weight block of the present invention, the present invention provides a lifting system for the detachable weight block based on the vertical shaft gravity energy storage, which is arranged in the lower warehouse and / or upper warehouse of the vertical shaft gravity energy storage system, and the weight block used in the vertical shaft gravity energy storage system is the detachable weight block based on the vertical shaft gravity energy storage of the present invention. Taking the process of transporting the weight block stored in the lower warehouse to the lifting container during the energy storage process as an example, the operation mode of the lifting system is as follows: Figures 1 to 3 As shown, the main features include three states shown in the figure: the weight block is lifted by the jacking device, the upper weight block is lowered to combine the weight blocks, and the weight block combination is ready to be lifted in the lifting container.

[0041] The lower warehouse and / or upper warehouse of the shaft-type gravity energy storage system has a transport system, which includes a transport vehicle 6 capable of transporting heavy objects between the heavy object storage position and the area near the shaft. Taking the lower warehouse as an example, the lower warehouse is generally an underground chamber, and the lower part of the shaft is connected to the underground chamber. The lifting container 10 can be lifted and lowered to the height of the upper warehouse and the lower warehouse under the traction of the lifting wire rope 11; when the lifting container 10 is at the height of the lower warehouse, the heavy objects (heavy object assembly) can be input or output through the transport system of the lower warehouse (such as a conveyor located at the shaft mouth); the heavy object storage position is generally a tunnel structure located far away from the shaft mouth, which has multiple transport vehicles 6 for efficient transportation. The transport vehicles 6 have structures that can carry, lift and transport heavy objects; the relevant technical content and specific implementation methods are existing technologies and are not the focus of improvement of this solution, so they will not be elaborated here.

[0042] See also Figure 1 The jacking system includes a jacking device 7, which is a device that uses hydraulic pressure or other principles to provide a large jacking force to lift the heavy object to a certain height. In this solution, there are at least two jacking devices 7, and the two jacking devices 7 form a group, which are respectively located on both sides of the running path of the transport vehicle 6 to form a set of jacking devices; more specifically, the transportation system also includes a track 9, the transport vehicle 6 (such as an RGV trolley) is located on the track 9, and the jacking device 7 is arranged on both sides of the track 9. The jacking device 7 includes a pallet 8 and a lifting drive mechanism connected to the pallet 8. The lifting drive mechanism is, for example, a hydraulic cylinder, the cylinder body of which is fixedly set in the lower warehouse / upper warehouse, and the pallet 8 is fixedly set at the end of the piston rod.

[0043] When a single weight block is placed on a transport vehicle 6 or is matched and stacked and docked on another single weight block, a lifting gap is formed at least on both sides of the bottom of the upper weight block. The position of the tray 8 corresponds to the lifting gap, and the thickness of the lifting gap is greater than the thickness of the tray 8. The tray 8 can penetrate (and move out of) the lifting gap at the bottom of the weight block. The tray 8 is the main load-bearing structure of the lifting device 7. The tray 8 contacts the bottom surface on both sides of the weight block, and its lifting height is greater than the overall net height of a single weight block (including the socket column 4). For example, the lifting height of the lifting device = the height H of the weight block body + 50mm. The lifting height of the lifting device of the present invention is greater than the overall net height of a single weight block, and its characteristics are: accurate positioning, high vertical height control accuracy, fast lifting speed, high lifting efficiency and stable lifting quality.

[0044] See also Figures 1 to 3 Based on the solution of the present invention, the present invention provides a method for storing energy based on vertical shaft gravity, which adopts the detachable weight block and jacking system of the present invention, and includes the following contents.

[0045] The system construction phase includes making standard weight blocks and arranging the jacking system and jacking device at the lower warehouse wellhead.

[0046] During the loading process of heavy blocks, a heavy block monomer (heavy block A) is transported to the jacking device by a transport vehicle, and the jacking device lifts the heavy block monomer (heavy block A). At the same time, the transport vehicle withdraws, and then another heavy block monomer (heavy block B) is transported to the jacking device (i.e., directly below the heavy block A) by (the same or other) transport vehicle. The jacking device drives the heavy block monomer (heavy block A) to be lowered, so that the heavy block monomer (heavy block A) is combined with the other heavy block monomer (heavy block B), and finally the combined heavy block assembly is sent into the lifting container.

[0047] During the unloading process of heavy blocks, after the heavy block assembly leaves the lifting container, the heavy block assembly is transported to the jacking device by a transport vehicle. The jacking device lifts the upper heavy block monomer, and the lower heavy block monomer is transported away by the transport vehicle. Then the (same or other) empty transport vehicle runs to the jacking device, and the jacking device drives the upper heavy block monomer down to the transport vehicle. Finally, the transport vehicle transports the heavy block monomer to the heavy block storage position.

[0048] More specifically, the jacking device 7 is located relatively close to the shaft and relatively far from the heavy block storage location. Therefore, during most of the heavy block transportation process, the heavy blocks are transported individually, and are only stacked (and split) near the lifting container. The transportation system also has other structures such as a conveyor, located between the jacking device and the wellhead (lifting container), which is used to cooperate with the lifting container to complete the loading, unloading, and transportation processes of the heavy block assembly, and can cooperate with the rear transport vehicle to complete the handover process of the heavy block assembly. The transport vehicle carries a single heavy block A from the depth of the lower warehouse along the track toward the wellhead, passing through the jacking devices set on both sides of the track; when the transport vehicle reaches a specific position near the jacking device, it will begin to slow down and then stop at the jacking device position; as the transport vehicle travels, the tray of the jacking device will smoothly cut into the bottom of both sides of the heavy block and connect; once the transport vehicle reaches the designated position, the jacking device begins to operate and controls the tray to drive the heavy block A vertically until it is completely separated from the transport vehicle; then, the transport vehicle drives out of the lifting system along the track. When the heavy block A is lifted to a certain height, the jacking device will stop lifting upwards. At this time, the second transport vehicle carrying a single heavy block B enters the lifting system and arrives at the same designated position of the jacking device, stopping just below the first heavy block A. At this time, the tray of the jacking device begins to descend, driving the heavy block A down and completing the splicing and combination of the upper and lower heavy blocks A and B. The spliced ​​heavy block assembly leaves the lifting system driven by the transport vehicle and is transported into the lifting container at the lower warehouse wellhead through other structures. The jacking system of the present invention does not affect the horizontal operation of the assembled heavy block assembly, that is, when the heavy block assembly enters the lifting container, the jacking system remains unchanged and returns to its original position after being in place. During unloading, after the heavy block assembly leaves the lifting container, it runs horizontally to the position of the jacking device. At this time, the jacking device is inserted between the upper and lower heavy block monomers, lifting the upper heavy block monomer, and then driving the upper heavy block monomer to the ground after the lower heavy block monomer is transported away.

[0049] It should be noted that in order for the shaft-type gravity energy storage system to have a higher energy conversion efficiency, the weights lifted in the shaft need to be of a larger mass. Therefore, current research has adopted a higher rectangular weight block to adapt to the structural characteristics of the shaft. However, if the weight block is higher and heavier, it will affect the transportation efficiency and transportation stability in the upper and lower warehouses. The weight block assembly of the utility model is a collection composed of two or more weight block monomers. The main feature is that it can be assembled, spliced, disassembled and separated by multiple weight blocks. The weight block assembly as a whole has a higher volume and mass, and can apply a greater gravity load than a single weight block monomer. And preferably, the size of the weight block assembly is designed to match the size of the lifting container. Compared with the weight block assembly, a single weight block monomer has a lighter mass, a shorter height, and a lower center of gravity, so that the weight block monomer has many advantages in the transportation system of the lower warehouse, such as being safer, more stable, not easy to fall over, and having high transportation efficiency.

[0050] In summary, this solution considers the application of logistics and transportation. The gravity energy storage weight block and jacking system designed can continuously circulate the weight block, forming a stable and uniform heavy logistics, ensuring the continuity of the energy storage process, reducing equipment loss and failure risks, and improving operational efficiency and stability. It is especially suitable for the lower warehouse of the shaft gravity energy storage system. This solution is equipped with a weight block with a low center of gravity, a groove on the top surface, and a protrusion on the bottom surface. The low center of gravity makes it more stable and has strong anti-dumping ability during transportation and transshipment, reducing safety risks. The shape close to a regular cube is convenient for stacking and storage, improving space utilization. The reasonable length, width and height size range reduces the difficulty of production and processing and logistics costs. The socket column structure ensures the firmness and stability of the weight block group after splicing. The splicable groove and protrusion design can adjust the height and mass of the weight block group through assembly and disassembly according to different gravity energy storage requirements, increasing the flexibility and adaptability of the energy storage and power generation system. The relatively low mass of each weight block in this solution reduces the force required to start and brake the transport vehicle, lowering energy consumption, alleviating operational strain on the conveying system, and extending equipment life. This solution also facilitates overall system dispatch, increases transport vehicle speed, and shortens response time, making the system safer, more stable, and more efficient. The low height of each weight block in this solution reduces the height of the lower chamber and tunnels. This reduces the need for and waste of underground space, lowers construction costs and difficulty, and complies with sustainable development requirements. The weight blocks in this solution can be stacked, with controllable height and weight, flexibly meeting the gravitational potential energy requirements for different power generation and storage scenarios, maintaining ideal and stable charge and discharge efficiency, and enhancing system flexibility and adaptability. By adjusting the effective shaft height, as well as the number and size of the lifting containers and weight blocks, during the design phase based on project and environmental conditions, this solution can better adapt to diverse topographical and geological conditions, improving versatility and adaptability. It can also configure different installed capacities to meet varying energy storage needs, improving cost-effectiveness and efficiency.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; obviously, the embodiments described are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention; for ease of description, only the parts related to the relevant utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other; modifying the technical solutions described in the aforementioned embodiments, or equivalently replacing some of the technical features therein, does not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detachable weight block based on shaft gravity energy storage, characterized in that: The invention comprises a weight block monomer, wherein two or more weight block monomers can be stacked up and connected to form a weight block assembly; the weight block monomer comprises a weight block main body (1), the upper end of the weight block main body (1) has an upper end docking portion, and the lower end of the weight block main body (1) has a lower end docking portion, and the upper end docking portion corresponds to the lower end docking portion.

2. The detachable weight block based on shaft gravity energy storage according to claim 1 is characterized in that: The upper end docking portion includes a groove (2) located at the upper end of the weight block body (1), and the lower end docking portion includes a protrusion (3) located at the lower end of the weight block body (1); Alternatively, the upper end docking portion comprises a socket column (4) located at the upper end of the weight block main body (1), and the lower end docking portion comprises a socket hole (5) located at the lower end of the weight block main body (1).

3. The detachable weight block based on vertical shaft gravity energy storage according to claim 1, characterized in that: The upper end docking portion comprises a groove (2) located in the middle of the upper end of the weight block body (1), and the lower end docking portion comprises a protrusion (3) located in the middle of the lower end of the weight block body (1); the height of the protrusion (3) is greater than the depth of the groove (2).

4. The detachable weight block based on shaft gravity energy storage according to claim 3 is characterized in that: The bottom of the groove (2) is a plane, and the bottom of the protrusion (3) is a plane; and / or the portion of the lower end surface of the weight block body (1) outside the protrusion (3) is a plane.

5. The detachable weight block based on vertical shaft gravity energy storage according to claim 3, characterized in that: The side wall of the groove (2) has an inclined surface or a curved surface, and the cross-sectional dimension of the upper opening of the groove (2) is larger than the cross-sectional dimension of the bottom of the groove (2); the side wall of the protrusion (3) has an inclined surface or a curved surface, and the cross-sectional dimension of the upper part of the protrusion (3) is larger than the cross-sectional dimension of the lower part of the protrusion (3); the shape of the side wall of the groove (2) matches that of the side wall of the protrusion (3).

6. The detachable weight block based on vertical shaft gravity energy storage according to claim 3, characterized in that: The upper end docking portion further comprises a socket column (4) located at the upper end of the weight block main body (1), and the lower end docking portion further comprises a socket hole (5) located at the lower end of the weight block main body (1); the position of the socket column (4) in the upper end surface of the weight block main body (1) is located within the range of the groove (2), and the position of the socket hole (5) in the lower end surface of the weight block main body (1) is located within the range of the protrusion (3).

7. The detachable weight block based on vertical shaft gravity energy storage according to any one of claims 1 to 6, characterized in that: The height dimension of the weight block main body (1) is equal to or smaller than the width dimension of the weight block main body (1).

8. A lifting system for detachable weight blocks based on vertical shaft gravity energy storage, characterized in that: It is arranged in the lower warehouse and / or the upper warehouse of the shaft-type gravity energy storage system, and the weight blocks used in the shaft-type gravity energy storage system are detachable weight blocks based on shaft gravity energy storage according to any one of claims 3 to 6; the lower warehouse and / or the upper warehouse of the shaft-type gravity energy storage system has a transport system, and the transport system includes a transport vehicle (6) capable of transporting the weight blocks between the weight block storage position and a location near the shaft; The jacking system includes a jacking device (7), and the jacking devices (7) are at least two; the two jacking devices (7) form a group and are respectively located on both sides of the running path of the transport vehicle (6); the jacking device (7) includes a tray (8) and a lifting drive mechanism connected to the tray (8); When the weight block monomer is placed on a transport vehicle (6) or is matched and stacked and docked on another weight block monomer, a lifting gap is formed below the upper weight block monomer at least on two sides, the position of the tray (8) corresponds to the lifting gap, and the thickness of the lifting gap is greater than the thickness of the tray (8).

9. The jacking system of detachable weight blocks based on vertical shaft gravity energy storage according to claim 8, characterized in that: The jacking device (7) is located relatively close to the shaft and relatively far away from the heavy object storage location.

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