Novel stack area structure of gravity energy storage system

Abstract

The invention relates to the technical field of gravity energy storage, in particular to a novel stack area structure of a gravity energy storage system, which comprises a platform and a bearing vehicle, the collecting hopper is arranged on the platform; the storage bin is arranged on the platform; the transfer jacking mechanism is arranged in the collecting hopper and used for controlling the bearing vehicle to move; the jacking bucket is arranged in the storage bin; the ball is arranged in the collecting hopper; the collecting channel is used for connecting the collecting hopper with the storage bin; and the conveying channel is arranged on the storage bin, energy in the conversion process of the bearing vehicle is controlled by controlling the number of the balls in the bearing vehicle, output adjustment of the gravity energy storage power is achieved, and the device can discretize the mass block, so that the whole gravity energy storage system has the capacity of accurately and smoothly controlling the power.

Description

Technical Field

[0001] This invention relates to the field of gravity energy storage technology, and in particular to a novel stack area structure for a gravity energy storage system. Background Technology

[0002] Against the backdrop of the global energy system's transition to a low-carbon model, the intermittency and unpredictability of renewable energy sources such as wind and solar power pose challenges to grid operation, urgently requiring efficient energy storage technologies to achieve supply and demand balance. Traditional pumped hydro storage is limited by terrain and cost, while lithium batteries face resource dependence and high carbon emissions issues.

[0003] Gravity energy storage technology stores energy through mechanical systems, but its inherent characteristics lead to two major technical bottlenecks: first, the mechanical inertia of lifting heavy objects causes a second-level power regulation delay, which cannot meet the millisecond-level response requirements of the power grid; second, the stepped energy output of discrete heavy objects makes it difficult to achieve precise power control. These shortcomings restrict the application of gravity energy storage in high-value power grid services.

[0004] To address these issues, a novel stacking structure for gravity energy storage systems is proposed. This structure aims to improve the power response speed and output accuracy of gravity energy storage by refining the mechanical system design, thereby promoting its large-scale application in scenarios such as grid frequency regulation and black start. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is that the power response speed and output accuracy of gravity energy storage are not easy to control.

[0006] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a novel stack area structure for a gravity energy storage system, including a platform, and further comprising,

[0007] Cargo carrier;

[0008] The collection container is located on a platform;

[0009] Storage bays, located on the platform;

[0010] The transfer lifting mechanism, located inside the collection hopper, is used to control the displacement of the carrier vehicle;

[0011] The lifting bucket is located inside the storage compartment;

[0012] The ball bearing is located inside the collection hopper;

[0013] Collection channel, which connects the collection hopper and the storage bin;

[0014] A conveying channel is located on the storage compartment.

[0015] In a preferred embodiment of the novel stack area structure of the gravity energy storage system of the present invention: the carrier vehicle is provided with a release door;

[0016] The vehicle is equipped with a gravity sensor.

[0017] In a preferred embodiment of the novel stack area structure of the gravity energy storage system of the present invention: a first switching door is provided at one end of the collection channel;

[0018] A second door is provided at one end of the conveying channel.

[0019] In a preferred embodiment of the novel stack area structure of the gravity energy storage system of the present invention: the top cross-section of the lifting bucket is triangular.

[0020] In a preferred embodiment of the novel stack area structure of the gravity energy storage system of the present invention: the collection channel is provided with a first expansion port at one end near the storage compartment;

[0021] The conveying channel is provided with a second expansion port at one end near the storage compartment;

[0022] Both the first expansion port and the second expansion port are funnel-shaped.

[0023] In a preferred embodiment of the novel stack area structure of the gravity energy storage system of the present invention, a start button is also provided on the platform.

[0024] In a preferred embodiment of the novel stack area structure of the gravity energy storage system of the present invention: the width of the collection bucket is greater than the width of the carrier vehicle.

[0025] In a preferred embodiment of the novel stack area structure of the gravity energy storage system of the present invention: the carrier vehicle is provided with two symmetrically arranged storage spaces;

[0026] There are two collection channels and two conveying channels.

[0027] In a preferred embodiment of the novel stack area structure of the gravity energy storage system described in this invention: the required load of the carrier vehicle is determined based on the power required by the gravity energy storage system;

[0028] The gravity sensor controls the closing of the second door based on the required load of the vehicle.

[0029] In a preferred embodiment of the novel stack area structure of the gravity energy storage system of the present invention: the collection channel and the delivery channel are made of flexible hoses.

[0030] The beneficial effects of this invention are as follows: by controlling the number of balls inside the carrier, the energy during the carrier conversion process can be controlled, thereby achieving adjustment of the output power of gravity energy storage. This device can discretize the mass block, enabling the entire gravity energy storage system to have the ability to precisely and smoothly control the power. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0032] Figure 1 A schematic diagram of the overall structure of the novel stack area structure of the gravity energy storage system is shown.

[0033] In the diagram: 1. Platform; 2. Carrier vehicle; 21. Release door; 22. Gravity sensor; 3. Collection hopper; 4. Storage bin; 5. Transfer lifting mechanism; 6. Lifting hopper; 7. Ball bearing; 8. Collection channel; 81. First opening / closing door; 82. First expansion port; 9. Conveying channel; 91. Second opening / closing door; 92. Second expansion port; 10. Start button. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0035] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0036] Reference Figure 1 This embodiment provides a novel stack area structure for a gravity energy storage system, including platform 1, which is the top platform in the gravity energy storage system.

[0037] It also includes a carrier vehicle 2; the carrier vehicle 2 is a mass block loading vehicle in the gravity energy storage system. It should be noted that in the inclined track-type gravity energy storage system, energy is stored by the displacement of the carrier vehicle 2.

[0038] The collection bucket 3 is located on the platform 1. The width of the collection bucket 3 is greater than the width of the carrier 2. The two sides of the collection bucket 3 are inclined, which can facilitate the sliding of the mass block on the carrier 2 and make it easy to collect.

[0039] Storage compartment 4 is located on platform 1; part of storage compartment 4 is buried inside platform 1, and part of it is exposed outside platform 1.

[0040] The transfer lifting mechanism 5 is located inside the collection hopper 3 and is used to control the displacement of the carrier 2. The transfer lifting mechanism 5 can control the raising of the carrier 2, as well as the lateral and longitudinal displacement of the carrier 2. During use, the transfer lifting mechanism 5 first moves the carrier 2 to the top of the collection hopper 3, and then raises the carrier 2, and the carrier 2 drops the mass block inside it.

[0041] The lifting bucket 6 is located inside the storage chamber 4. The top cross-section of the lifting bucket 6 is triangular. The structural design of the lifting bucket 6 facilitates the guidance of the mass block inside the storage chamber 4 to the two sides. The lifting bucket 6 can perform lifting and lowering operations inside the storage chamber 4, thereby changing the position of the internal mass block.

[0042] The ball bearing 7 is located inside the collection hopper 3. The ball bearing 7 is a mass block in the gravity energy storage system. Here, the ball bearing 7 is made of a metal shell and is filled with materials. The filling material can be manganese slag, red mud, phosphogypsum, or other industrial waste residues. Using these materials can provide a new solution for the treatment of industrial waste residues. Using industrial waste residues as filling materials realizes the reuse of energy and improves environmental protection benefits.

[0043] Collection channel 8 connects collection hopper 3 and storage compartment 4; the balls 7 that fall into collection hopper 3 can roll into the interior of storage compartment 4 through collection channel 8.

[0044] The conveying channel 9 is located on the storage bin 4. The lifting bucket 6 can lift the ball bearings 7 in the storage bin 4, and finally discharge them through the conveying channel 9.

[0045] In use, the inclined track type gravity energy storage system transports the carrier vehicle 2 to the platform 1 to store gravity energy. The carrier vehicle 2 puts the transported ball bearings 7 into the collection bucket 3 and collects them into the storage chamber 4 through the collection channel 8. When converting energy, the lifting bucket 6 lifts the ball bearings 7 in the storage chamber 4 so that the ball bearings 7 can be transported to another carrier vehicle 2 through the conveying channel 9. By controlling the number of ball bearings 7 in the carrier vehicle 2, the energy of the carrier vehicle 2 during the conversion process can be controlled, thereby realizing the adjustment of the output power of gravity energy storage.

[0046] As an optional embodiment: the carrier vehicle 2 is provided with a release door 21; the carrier vehicle 2 is provided with a gravity sensor 22.

[0047] When the transfer lifting mechanism 5 moves the carrier 2 above the collection hopper 3, the ball bearing 7 inside the carrier 2 is released by opening the release door 21, so that it falls into the inside of the collection hopper 3.

[0048] As an optional embodiment: a first switch door 81 is provided at one end of the collection channel 8; a second switch door 91 is provided at one end of the conveying channel 9.

[0049] The first switch door 81 is used to control the opening of the end of the collection channel 8, thereby controlling whether the ball bearing 7 in the collection hopper 3 can enter the storage chamber 4.

[0050] The second switch 91 is used to control the opening of the end of the conveying channel 9, thereby controlling the release of the ball bearings 7 in the conveying channel 9.

[0051] As an optional embodiment: the collection channel 8 is provided with a first expansion port 82 at one end near the storage chamber 4; the conveying channel 9 is provided with a second expansion port 92 at one end near the storage chamber 4; both the first expansion port 82 and the second expansion port 92 are funnel-shaped. The funnel-shaped structure of the first expansion port 82 facilitates the rolling of the ball 7 into the storage chamber 4, and the funnel-shaped structure of the second expansion port 92 facilitates the entry of the ball 7 in the storage chamber 4 into the conveying channel 9.

[0052] As an optional embodiment, it also includes a start button 10 provided on the platform 1, which is used to control the opening of the second door 91.

[0053] As an optional embodiment: the carrier vehicle 2 has two symmetrically arranged storage spaces; the collection channel 8 and the conveying channel 9 are both provided in twos.

[0054] It should be noted that both storage spaces inside the carrier vehicle 2 are used to hold the ball bearings 7. There are two collection channels 8 and two conveying channels 9. The two collection channels 8 are connected to the storage compartment 4 at the same height, and the two conveying channels 9 are connected to the storage compartment 4 at the same height. The end of the collection channel 8 connected to the collection hopper 3 is higher than the end connected to the storage compartment 4, so that the ball bearings 7 can roll into the storage compartment 4 under the action of gravity. The end of the conveying channel 9 connected to the storage compartment 4 is higher than the other end, so that the ball bearings 7 in the conveying channel 9 can be guided out under the action of gravity.

[0055] As an optional embodiment: the required load of the carrier vehicle 2 is determined based on the power required by the gravity energy storage system; the gravity sensor 22 controls the closing of the second door 91 based on the required load of the carrier vehicle 2.

[0056] As an alternative embodiment: the collection channel 8 and the delivery channel 9 are made of flexible tubing.

[0057] During operation, the transfer lifting mechanism 5 generates mechanical vibration. This vibration accelerates the descent of the balls 7 in the collection bucket 3, improving efficiency. The collection channel 8 connects to both sides of the collection bucket 3 and the storage chamber 4. When the carrier 2 releases the balls 7 through the release door 21, the mass of the balls 7 entering the storage chamber 4 becomes more uniform. When the lifting bucket 6 lifts the balls 7 inside, the balls 7 on both sides are discharged through the conveying channels 9 on both sides. The loading mass of the carrier 2 is controlled according to the power generated. Pressing the start button 10 opens the second switch door 91, filling the storage space on both sides of the carrier 2, making the mass distribution of the carrier 2 more uniform and increasing the stability of the energy storage system during operation. It should be noted that the lifting bucket 6 can be made of 42CrMo alloy, which can withstand working pressures of over 50MPa and has three times the wear resistance of ordinary carbon steel. An internal support is added to increase stability and reduce manufacturing and lifting costs. The triangular structure increases the flow rate of the ball bearings 7, shortens the rolling time, and improves the overall efficiency of the gravity energy storage system. Because the end of the collection channel 8 near the collection hopper 3 is higher, it ensures that the ball bearings 7 can flow normally into the storage chamber 4. Similarly, because the end of the conveying channel 9 near the storage chamber 4 is higher, it ensures that the ball bearings 7 can flow normally into the carrier vehicle 2. The collection channel 8 and conveying channel 9 are made of flexible hoses. Compared to rigid pipes, flexible hoses exhibit significant comprehensive advantages: their weight per unit length is only 1 / 5 that of steel pipes of the same specification, significantly reducing material transportation and support structure costs; their excellent impact resistance allows them to maintain a longer service life under frequent pressure fluctuations; during installation, their bending radius, which can reach up to 4 times the pipe diameter, increases construction efficiency by more than 60%, significantly shortening the project cycle; more importantly, flexible hoses have a dynamic deflection capability of ±15°, effectively absorbing mechanical vibrations during the lifting and lowering of heavy objects, not only reducing system operating noise but also reducing the fatigue failure risk of key connectors to less than 30% of that of rigid pipe systems. These characteristics led to the selection of flexible hoses in this invention.

[0058] The following describes the working process of the stacking area. After the carrier 2 arrives at the upper stacking area from the lower stacking area via the conveyor belt, the carrier 2 reaches the transfer lifting mechanism 5. During the lifting process, the first switch door 81 opens, and the ball bearings 7 are released from both sides of the carrier 2. The ball bearings 7 are collected by the collection bucket 3 and then reach the storage bin 4 through the collection channel 8. The ball bearings 7 are stored in the storage bin 4 and wait. When the carrier 2 needs precise control, after the interface between the conveying channel 9 and the carrier 2 is fully engaged, the start button 10 is pressed. The lifting bucket 6 at the bottom of the storage bin 4 begins to lift upwards, and the second switch door 91 at the conveying channel 9 opens and the first switch door 81 closes. The ball bearings 7 in the storage bin 4 are lifted and transported to both sides of the carrier 2 through the conveying channel 9. When the corresponding ball bearing 7 mass is reached, the gravity sensor 22 at the bottom of the carrier 2 sends a signal, causing the second switch door 91 at the conveying channel 9 to close. The carrier 2 then descends along the track to complete the power generation.

[0059] In summary, this device can discretize a portion of the mass block, enabling the entire gravity energy storage system to have the ability to precisely and smoothly control power.

[0060] The bottom lifting bucket 6 of the storage compartment 4 is designed in a triangular shape, which saves lifting height and increases the speed at which the balls 7 enter the conveying channel 9, reduces release time and improves the overall efficiency of the system.

[0061] The collection channel 8 and the conveying channel 9 are all designed on both sides of the storage compartment 4 to ensure that the mass of the ball bearings 7 on both sides of the carrier 2 is basically the same, thereby improving the stability of the carrier 2 during operation and reducing the dangers during operation.

[0062] The collecting bucket 3 is set together with the transfer and lifting mechanism 5. During the lifting process, the balls 7 are collected simultaneously. The vibration generated during the lifting process can accelerate the falling speed of the balls 7, improve the collection efficiency, shorten the collection time, and facilitate the continuity of the lifting and transfer process as well as the stability of the mechanical structure.

[0063] The ball bearing 7 is made of a metal shell and an internal filling material to meet the quality requirements. The filling material of the ball bearing 7 can be industrial waste such as manganese slag, red mud, phosphogypsum, etc. Using these materials can provide a new solution for the treatment of industrial waste. Using industrial waste as a filling material realizes the reuse of energy and improves environmental protection benefits.

[0064] The second door 91 is controlled by a gravity sensor 22 on the carrier vehicle 2. This allows for precise control of the gravity system power and faster, more stable signal transmission. Remote control is also possible, reducing labor costs.

[0065] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A novel stack area structure for a gravity energy storage system, comprising a platform (1), characterized in that: It also includes, Carrier vehicle (2); A collection bucket (3) is set on a platform (1); Storage compartment (4), which is located on platform (1); The transfer lifting mechanism (5) is located inside the collection hopper (3) and is used to control the displacement of the carrier vehicle (2); The lifting bucket (6) is located inside the storage compartment (4); Ball bearing (7) is placed inside the collection hopper (3); Collection channel (8) is used to connect collection hopper (3) and storage bin (4); A conveying channel (9) is provided on the storage compartment (4).

2. The novel stack area structure of the gravity energy storage system according to claim 1, characterized in that: The carrier vehicle (2) is equipped with a release door (21); The carrier vehicle (2) is equipped with a gravity sensor (22).

3. The novel stack area structure of the gravity energy storage system according to claim 2, characterized in that: One end of the collection channel (8) is provided with a first switch door (81); A second door (91) is provided at one end of the conveying channel (9).

4. The novel stack area structure of the gravity energy storage system according to claim 3, characterized in that: The top cross-section of the lifting bucket (6) is triangular.

5. The novel stack area structure of the gravity energy storage system according to claim 4, characterized in that: The collection channel (8) has a first expansion port (82) at one end near the storage compartment (4); The conveying channel (9) is provided with a second expansion port (92) at one end near the storage compartment (4); Both the first expansion port (82) and the second expansion port (92) are funnel-shaped.

6. The novel stack area structure of the gravity energy storage system according to claim 5, characterized in that: It also includes a start button (10) located on the platform (1).

7. The novel stack area structure of the gravity energy storage system according to claim 6, characterized in that: The width of the collection bucket (3) is greater than the width of the carrier vehicle (2).

8. The novel stack area structure of the gravity energy storage system according to claim 7, characterized in that: The carrier vehicle (2) has two symmetrically arranged storage spaces inside; Both the collection channel (8) and the conveying channel (9) are provided in twos.

9. The novel stack area structure of the gravity energy storage system according to any one of claims 3 to 8, characterized in that: The required load of the carrier vehicle (2) is determined based on the power required by the gravity energy storage system; The gravity sensor (22) controls the closing of the second door (91) according to the required load of the carrier (2).

10. The novel stack area structure of the gravity energy storage system according to claim 9, characterized in that: The collection channel (8) and the delivery channel (9) are made of flexible tubing.

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