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

Abstract

The invention discloses a detachable weight block based on vertical shaft gravity energy storage and a jacking system and method. 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 stacked 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 present invention belongs to the technical field of gravity energy storage, and in particular relates to a detachable weight block, a lifting system and a method based on shaft gravity energy storage. Background Art

[0002] The gravity energy storage system mainly consists of two parts: energy storage and discharge. When storing energy, materials (such as heavy blocks) are lifted from a low-altitude storage bin (referred to as the lower bin) to a high-altitude storage bin (referred to as the upper bin), and the electrical energy is finally converted into the gravitational potential energy of the materials for temporary storage; when discharging, the materials are transported from the high-altitude storage bin to the low-altitude storage bin, and the transmission device drives the generator to generate electricity, and the gravitational potential energy is finally converted into electrical energy. Among them, the heavy block is a large mass block made of a specific density material, which serves as the object of force application and the source of gravity in the gravity energy storage system.

[0003] Vertical shaft gravity energy storage is a gravity energy storage that uses the vertical shaft as a lifting and transportation channel for heavy objects, in which the transportation system is mainly responsible for the transportation and storage of heavy objects. The transportation system usually includes a lifting device, a transport vehicle and heavy objects. The lifting device (lifting container, such as a car) is responsible for lifting the heavy objects from the lower warehouse to the upper warehouse, and lowering the heavy objects when releasing energy. The transport vehicle is generally arranged on the tracks of the upper warehouse and the lower warehouse, and is responsible for transporting the heavy objects between the lifting device and the storage location.

[0004] The transport system of the lower warehouse of the shaft-type gravity energy storage needs to be highly reliable and safe to cope with the huge weight of the heavy blocks. At the same time, it also needs to have precise control capabilities to achieve efficient energy storage and release operations according to power demand.

[0005] The main influencing factors of the transportation system on the installed capacity of gravity energy storage are: the transportation capacity and transportation speed of a single heavy object. Without increasing the number of transport vehicles, the heavier the heavy object and the faster the transportation speed, the larger the theoretical installed capacity of gravity energy storage. However, at the current stage, the transportation capacity and operating speed of transport vehicles have their own upper limits. Generally speaking, the heavier the heavy object, the slower the overall transportation speed of the transport vehicle. This contradiction makes it difficult to further improve the energy storage efficiency. Summary of the invention

[0006] The technical problem to be solved by the present invention is: to provide a detachable weight block, a lifting system and a method based on shaft gravity energy storage, so as to solve the problem that the prior art cannot achieve safety, stability and efficiency; the present solution makes the height and quality of the weight block controllable, reduces the center of gravity height and processing and manufacturing difficulty of a single lifting weight block; while increasing the transport speed, it 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 portion, and the lower end of the weight block main body has a lower end docking portion, and the upper end docking portion corresponds to the lower end docking portion.

[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 lower end surface of the weight block body outside the protrusion is a plane.

[0011] Furthermore, the side wall of the groove has an inclined surface or a curved surface, 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 an inclined surface or a curved surface, 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 body, and the lower end docking part also includes a socket hole located at the lower end of the weight block body; the position of the socket column in the upper end surface of the weight block 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 body is located within the range of the protrusion.

[0013] Further, the height dimension of the weight block body is equal to or smaller than the width dimension of the weight block 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, and the transportation system includes a transport vehicle capable of transporting the heavy blocks between the heavy block storage position and the 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 pallet and a lifting drive mechanism connected to the pallet; when the heavy block monomer is placed on the transport vehicle or matched and stacked and docked on another heavy block monomer, a jacking gap is formed at least on both sides below the upper heavy block monomer, the position of the pallet corresponds to the jacking gap, and the thickness of the jacking gap is greater than the thickness of the pallet.

[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 position of the lifting device is relatively close to the shaft and relatively far away from the heavy object storage position.

[0017] According to the technical solution of the present invention, the present invention also provides a method based on shaft gravity energy storage, which adopts the jacking system of the present invention of the detachable weight block based on shaft gravity energy storage, and includes the following contents: During the process of loading the heavy blocks, a single heavy block is transported to the lifting device by a transport vehicle, the lifting device lifts the single heavy block, the transport vehicle withdraws, and then another single heavy block is transported to the lifting device by the transport vehicle, the lifting device drives the single heavy block to be lowered, so that the single heavy block is combined with the other single heavy block, and finally the combined heavy block assembly is sent into the lifting container; During the unloading process of the 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 empty transport vehicle runs to the jacking device, and the jacking device drives the upper heavy block monomer down to the transport vehicle; the transport vehicle transports the heavy block monomer to the heavy block storage position.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are as follows: 1. This scheme considers the application of logistics and transportation. The designed gravity energy storage heavy blocks and jacking system can continuously circulate and transport heavy blocks to form a stable and uniform heavy logistics, ensure the continuity of the energy storage process, reduce equipment loss and failure risks, and improve operating efficiency and stability; it is especially suitable for the lower warehouse of the shaft-type gravity energy storage system.

[0019] 2. This scheme 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 anti-dumping during transportation and transshipment, reducing safety risks; the shape close to a regular cube is convenient for stacking and storage, and improves 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, thereby increasing the flexibility and adaptability of the energy storage and power generation system.

[0020] 3. The mass of a single weight 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 warehouse chamber and tunnel is reduced accordingly; it can reduce the demand and waste of underground space development, reduce engineering construction costs and construction difficulties, and meet the requirements of sustainable development.

[0022] 5. The heavy blocks of this solution can be stacked on top of 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 plan, 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 present invention.

[0025] Figure 2 It is a schematic structural diagram of the heavy object block monomers provided by the present invention during the stacking process by means of a lifting device.

[0026] Figure 3 It is a schematic structural diagram of the weight block assembly provided by the present invention after being transported into a lifting container.

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

[0028] Figure 5 It is a top-view dimensional diagram of the weight block monomer provided by the present invention.

[0029] Description of reference numerals in the accompanying drawings: 1. The main body of the weight block; 2. The groove; 3. The protrusion; 4. The socket column; 5. The socket hole; 6. The transport vehicle; 7. The lifting device; 8. The pallet; 9. The track; 10. The lifting container; 11. The lifting wire rope. DETAILED DESCRIPTION

[0030] The present invention provides a detachable weight block, a lifting system and a method based on shaft gravity energy storage, which solves the problem that the prior art cannot achieve safety, stability and efficiency; the main purpose of the design of this scheme is to make the height and quality of the weight block controllable, reduce the center of gravity height and processing and manufacturing difficulty of a single lifting weight block; while increasing the transportation speed, ensure that the transportation process is safer and more stable, reduce the burden on the transportation system, and improve the transportation efficiency of the overall system.

[0031] The present invention solves the aforementioned contradiction between the mass of the weight blocks and the transportation efficiency. The weight blocks are designed to be assembleable and disassembled structures. For example, the mass and height of a single weight block are halved compared to the original weight blocks. Moreover, the weight block lifting system designed by the present invention can realize the scenario where a single weight block is stored separately and multiple weight blocks are used to generate electricity together. While reducing the pressure on the lower warehouse transportation system and increasing the driving speed of the transport vehicle, not only the safety and reliability of the lower warehouse transportation system are improved, but also because the total mass of the multiple weight 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.

[0032] See also Figures 1 to 3 The present invention provides a detachable weight block based on 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 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 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.

[0033] 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 body 1. The groove 2 and the protrusion 3 are formed on the upper and lower end faces of the weight block body 1. Taking the protrusion 3 as an example, the protrusion 3 protrudes downward from the part of the lower end face of the weight block body 1 outside the protrusion 3, and the height of this part 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 a gap (referred to as a lifting gap in this article) on at least the left and right sides below. The gap reserved on both sides can realize the process of lifting the weight block upward (i.e., lifting), thereby realizing splicing and assembly, and also facilitating the separation and disassembly of the weight block assembly.

[0034] More specifically, the bottom of the groove 2 is a plane, and the bottom of the protrusion 3 is a plane, so that stability can be ensured after stacking. The lower end surface of the weight block body 1 outside the protrusion 3 is a plane, that is, the part supporting the weight block during lifting is a plane, so as to ensure stability during lifting.

[0035] 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; thus, the longitudinal section of the groove 2 and the protrusion 3 on the weight block body 1 is, for example, in a trapezoidal shape. The shape of the side wall of the groove 2 matches that of the side wall of the protrusion 3, so that the positioning of the two is stable and accurate when combined.

[0036] Furthermore, the upper end docking portion also includes a socket column 4 located at the upper end of the weight block body 1, and the lower end docking portion also includes a socket hole 5 located at the lower end of the weight block body 1. The socket column 4 is, for example, a steel rod that is buried and fixed in the weight block body 1 and extends upward, and the socket hole 5 is a blind hole that opens 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 surface of the weight block 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 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 planes of the grooves 2 and protrusions 3, and are multiple points evenly distributed circumferentially.

[0037] Preferably, the height dimension of the weight block body 1 (excluding the height of the socket column 4) is equal to or less than the width dimension of the weight block body 1. For example, the weight block body 1 is similar to a cube, or a relatively smaller rectangular parallelepiped, or other prisms or cylinders with smaller height dimensions; preferably a cube structure, which is convenient for production and has a high space utilization rate for storage. In this solution, the center of a single weight block is low, which is more convenient for rapid transportation and less likely to cause the weight block to tip over.

[0038] See also Figure 4 , Figure 5 In a specific embodiment, a cube-shaped weight block body is used, which has clear edges and corners, is flat and neat, and is designed to have a groove and convex groove structure that can be assembled and disassembled in the vertical direction. The mass of a single weight block monomer 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 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 trapezoids (or rectangles), 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 buried 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, located 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 position of the socket columns 4. This preferred solution can effectively avoid large-scale shaking of the weight blocks after assembly.

[0039] In view of the design of the detachable weight block of the present invention, the present invention provides a lifting system of the detachable weight block 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 weight block used in the shaft gravity energy storage system is the detachable weight block based on shaft gravity energy storage of the present invention. Taking the process of transporting the weight block monomer 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.

[0040] The lower warehouse and / or upper warehouse of the shaft-type gravity energy storage system has a transportation system, and the transportation system includes a transport vehicle 6 that can transport heavy objects between the heavy object storage position and the position near the shaft. Take 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 to the height position 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 block assembly) can be input or output through the transportation system of the lower warehouse (such as a conveyor located at the shaft mouth); the heavy object storage position is generally a lane structure located far away from the shaft mouth, which has multiple transport vehicles 6 for efficient transportation, and the transport vehicle 6 has a structure that can carry, lift and transport heavy objects; the relevant technical content and the specific method of implementation are existing technologies, which are not the focus of improvement of this scheme, so they are not elaborated here.

[0041] 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 block 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, whose cylinder body is fixedly set in the lower warehouse / upper warehouse, and the pallet 8 is fixedly set at the end of the piston rod.

[0042] 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 main body height H of the weight block + 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.

[0043] See also Figures 1 to 3 Based on the solution of the present invention, the present invention provides a method based on shaft gravity energy storage, which adopts the detachable weight block and jacking system of the present invention, and includes the following contents.

[0044] The system construction phase includes making standard weight blocks and arranging the jacking system and jacking device at the lower warehouse wellhead.

[0045] 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), and the transport vehicle withdraws at the same time. Then, another heavy block monomer (heavy block B) is transported to the jacking device (i.e., directly below heavy block A) by (the same or other) transport vehicle, and 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.

[0046] During the unloading process of the 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.

[0047] More specifically, the position of the jacking device 7 is relatively close to the shaft and relatively far from the heavy block storage position, so that in most of the heavy block transportation process, the heavy block monomers are transported, and only stacked (and split) near the lifting container. The transportation system also has other structures such as conveyors, which are located between the jacking device and the wellhead (lifting container), and are used to cooperate with the lifting container to complete the loading, unloading, and transportation process 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 direction to the wellhead, passing through the jacking device set on both sides of the track; when the transport vehicle reaches a specific position near the jacking device, it will start 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 specified position, the jacking device starts to operate and controls the tray to drive the heavy block A to lift 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 weight block A is lifted to a certain height, the lifting device will stop lifting upward. At this time, the second transport vehicle carrying a single weight block B enters the lifting system and arrives at the same designated position of the lifting device, staying directly below the first weight block A. At this time, the tray of the lifting device begins to descend, driving the weight block A to descend, and completing the splicing and combination of the upper and lower weight blocks A and B. The spliced ​​weight 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 lifting system of the present invention does not affect the horizontal operation of the assembled weight block assembly, that is, when the weight block assembly enters the lifting container, the lifting system remains unchanged and returns to its original position after being in place; when unloading, after the weight block assembly leaves the lifting container, it runs horizontally to the position of the lifting device. At this time, the lifting device is inserted between the upper and lower weight block monomers, lifting the upper weight block monomer, and after the lower weight block monomer is transported away, it drives the upper weight block monomer to the ground.

[0048] It should be noted that in order to make the shaft-type gravity energy storage system have a higher energy conversion efficiency, the weights lifted in the shaft need to have a larger mass. Therefore, current research has adopted a higher rectangular weight block to match the characteristics of the shaft structure. 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 present invention is a collection composed of two or more weight block monomers. The main feature is that it can be assembled and spliced ​​by multiple weight blocks, disassembled and separated. The weight block assembly has a higher volume and mass as a whole, 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, and having high transportation efficiency.

[0049] In summary, from the perspective of logistics and transportation applications, this scheme considers the gravity energy storage heavy blocks and jacking system designed to continuously circulate heavy blocks, forming a stable and uniform heavy logistics, ensuring the continuity of the energy storage process, reducing equipment loss and failure risks, and improving operating efficiency and stability; it is especially suitable for the lower warehouse of the shaft gravity energy storage system. This scheme is equipped with heavy blocks 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 set 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. The mass of a single weight block in this scheme is relatively small, which reduces the force required for starting and braking the transport vehicle, reduces energy consumption, reduces the operating pressure of the conveying system, and prolongs the life of the equipment; it is beneficial to the overall dispatching of the conveying system, increases the speed of the transport vehicle and shortens the response time, making the system safer, more stable and more efficient. The height of a single weight block in this scheme is relatively low, and the height of the lower warehouse chamber and the tunnel is reduced accordingly; it can reduce the demand and waste of underground space development, reduce the cost and difficulty of engineering construction, and meet the requirements of sustainable development. The weight blocks in this scheme 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 an ideal and stable charging and discharging efficiency, and improve the flexibility and adaptability of the system. Combined with this scheme, the effective height of the shaft is adjusted in the design stage according to the engineering and actual environmental conditions, and the number and size of the lifting container and weight blocks can be better adapted to different terrain and geological conditions, and the versatility and adaptability can be improved; different installed capacities can be configured to meet different energy storage needs, and the economy and efficiency can be improved.

[0050] 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 them; obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of 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 inventions are shown in the accompanying drawings. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other; modifying the technical solutions recorded in the aforementioned embodiments, or replacing some of the technical features therein by equivalents, 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, 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, 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 comprises a groove (2) located at the upper end of the weight block body (1), and the lower end docking portion comprises 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 body (1), and the lower end docking portion comprises a socket hole (5) located at the lower end of the weight block body (1).

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

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

8. A lifting system of detachable weight blocks based on 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 close to the shaft; The lifting system comprises a lifting device (7), wherein the lifting devices (7) are at least two; the two lifting devices (7) form a group and are respectively located on both sides of the running path of the transport vehicle (6); the lifting device (7) comprises a pallet (8) and a lifting drive mechanism connected to the pallet (8); When a heavy object block monomer is placed on a transport vehicle (6) or is stacked and docked on another heavy object block monomer in a matching manner, a lifting gap is formed at least on two sides below the upper heavy object block monomer, 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 the detachable weight block based on the vertical shaft gravity energy storage according to claim 8 is characterized in that: The position of the lifting device (7) is relatively close to the vertical shaft and relatively far away from the heavy object storage position.

10. A method based on vertical shaft gravity energy storage, characterized in that: It adopts the detachable weight block jacking system based on shaft gravity energy storage according to claim 8, which includes the following contents: During the process of loading the heavy blocks, a single heavy block is transported to the lifting device by a transport vehicle, the lifting device lifts the single heavy block, the transport vehicle withdraws, and then another single heavy block is transported to the lifting device by the transport vehicle, the lifting device drives the single heavy block to be lowered, so that the single heavy block is combined with the other single heavy block, and finally the combined heavy block assembly is sent into the lifting container; During the unloading process of the 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 empty transport vehicle runs to the jacking device, and the jacking device drives the upper heavy block monomer down to the transport vehicle; the transport vehicle transports the heavy block monomer to the heavy block storage position.

Images