Novel gravity energy storage system

Abstract

The utility model provides a novel gravity energy storage system, and relates to the technical field of gravitational potential energy storage, the novel gravity energy storage system comprises a top bridge arranged between two adjacent base body buildings, a containing cavity arranged on the two base body buildings, a lifting power generation mechanism and a supporting mechanism, and the containing cavity is located below the top bridge; the lifting power generation mechanism is located on the top bridge and provided with a steel wire cable. The supporting mechanisms are slidably arranged in the containing cavity in the span direction of the top bridge, the multiple supporting mechanisms are horizontally arranged side by side in the direction perpendicular to the span direction of the top bridge, the inner ends of the supporting mechanisms are connected with the telescopic end of the telescopic mechanism, the outer ends of the supporting mechanisms can stretch out of the containing cavity, and multiple transmission rollers are arranged on the upper surfaces of the outer ends of the supporting mechanisms; the transmission rollers are connected with the transmission mechanism, and rotating shafts of the multiple transmission rollers are arranged in the span direction of the top bridge; therefore, the heavy object block lifted to the high altitude can be supported more stably, the gravity energy storage capacity is improved, and the power generation effect and the economic benefit are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gravity potential energy storage, in particular to a novel gravity energy storage system. Background Art

[0002] With the rapid development of my country's power industry, renewable energy represented by wind and solar energy has developed rapidly, but the uneven spatial distribution and instability of supply time have greatly restricted the development of new energy technologies. Compared with traditional electrochemical energy storage methods, new gravity energy storage technology has the advantages of safety, large energy storage capacity, and small impact on the environment. Compared with traditional pumped storage gravity energy storage methods, it significantly reduces the dependence on geographical conditions and water resources, and has broad application prospects.

[0003] Gravity energy storage technology includes vertical gravity energy storage, slope gravity energy storage and other forms. The principle of gravity energy storage is that when the electricity price is low, the heavy objects are lifted to a certain height by electricity consumption, and the electrical energy is converted into gravitational potential energy for storage. When the electricity consumption is at a peak, the heavy objects are lowered to drive the generator to generate electricity, and the gravitational potential energy is converted into electrical energy. Generally, energy storage and energy release are carried out once a day, and the difference in electricity prices is used to generate benefits, which is also of great significance to the rational allocation of the power system.

[0004] The traditional vertical gravity energy storage method is to build a steel structure building on flat ground, which can generally reach more than 100 meters, and use the lifting and power generation mechanism on the top of the building to lift and lower many heavy blocks. It has high efficiency, but the project volume is large, the foundation is deep, and the cost is high; and usually each lifting and power generation mechanism lifts a heavy block and maintains the heavy block in a hoisted state on the top of the building, which has a low safety factor and limited power generation efficiency. Another form is the slope gravity energy storage method, which has large track friction loss, low efficiency, and high track layout requirements, otherwise it will overturn, occupy a large area of ​​the hillside, and easily destroy the vegetation on the hillside, which is subject to environmental protection restrictions.

[0005] Therefore, a new type of gravity energy storage system is developed to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to provide a new type of gravity energy storage system to solve the problems existing in the above-mentioned prior art, which can provide more stable support for heavy objects lifted to high altitudes, and improve the gravity energy storage capacity, thereby improving the power generation effect and economic benefits.

[0007] To achieve the above purpose, the utility model provides the following solutions:

[0008] A novel gravity energy storage system comprises a top bridge arranged between two adjacent base buildings, a storage cavity arranged on the two base buildings, a lifting power generation mechanism and a supporting mechanism, wherein the storage cavity is located below the top bridge; the lifting power generation mechanism is located on the top bridge and is provided with a steel cable for connecting a heavy object; the supporting mechanism is slidably arranged in the storage cavity along the span direction of the top bridge, and a plurality of supporting mechanisms are horizontally arranged side by side in a direction perpendicular to the span of the top bridge, the inner end of the supporting mechanism is connected to the telescopic end of the telescopic mechanism, the outer end of the supporting mechanism can extend out of the storage cavity, a plurality of transmission rollers are provided on the upper surface of the outer end of the supporting mechanism, the transmission rollers are connected to the transmission mechanism, and the rotating axes of the plurality of transmission rollers are arranged along the span direction of the top bridge.

[0009] Preferably, the support mechanism comprises a support seat, the inner end of the support seat is connected to the telescopic end of the telescopic mechanism, and the outer end is provided with the transmission roller; the height of the support seat is adapted to the height of the accommodating cavity.

[0010] Preferably, a plurality of horizontally arranged rollers are provided at the bottom of the support seat.

[0011] Preferably, a plurality of the support mechanisms arranged side by side form a support group, and limit blocks are provided at both ends of the support group along the horizontal conveying direction of the weight block, and the top height of the limit blocks is higher than the bottom height of the weight block.

[0012] Preferably, the telescopic mechanism is a hydraulic cylinder.

[0013] Preferably, it also includes a bottom bridge arranged between the two base buildings, the bottom bridge is located below the accommodating cavity and is directly opposite to the top bridge up and down; a buffer pad for buffering the heavy block is arranged on the bottom bridge.

[0014] Preferably, the lifting and power generation mechanism comprises a generator motor, the output end of the generator motor is connected to a gearbox, and the output shaft of the gearbox is connected to a steel cable.

[0015] Preferably, a hook is provided at the end of the steel cable, and a fixing ring for connecting the hook is provided at the top of the weight block.

[0016] Preferably, the output end of the generator motor is connected to a steel cable, the end of the steel cable is provided with a hook, and the top of the weight block is provided with a fixing ring for connecting the hook.

[0017] Preferably, a plurality of groups of the lifting and power generation mechanisms are arranged on the top bridge.

[0018] Preferably, the base building is a mountain.

[0019] Compared with the prior art, the utility model has the following technical effects:

[0020] The utility model is capable of supporting heavy objects lifted to a high place by arranging a retractable supporting mechanism, thereby improving the stability of the heavy objects in the air; and utilizing the transmission rollers arranged at the outer ends of the supporting mechanism, the heavy objects in the air can be transported to adjacent supporting mechanisms, so that the lifting and power generation mechanism can lift a plurality of heavy objects and place them on different supporting mechanisms, thereby increasing the number of lifted heavy objects without increasing the number of lifting and power generation mechanisms, improving the gravity energy storage capacity, and further improving the energy release and power generation capacity and economic benefits.

[0021] In other technical solutions of the utility model, the base building is a mountain, which can reduce the construction cost of the new gravity energy storage system, occupy a small mountain area, and is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic diagram of the novel gravity system in the utility model when no heavy object is lifted;

[0024] Figure 2 It is a schematic diagram of the new gravity system in the utility model after the weight block is lifted;

[0025] Figure 3 for Figure 2 A top view of

[0026] Figure 4 This is a schematic diagram from the AA perspective (excluding the top bridge);

[0027] Figure 5 This is a schematic diagram from BB's perspective (excluding the heavy object);

[0028] Description of reference numerals:

[0029] 1. Top bridge; 2. Lifting power generation mechanism; 21. Generator motor; 22. Small gear; 23. Large gear; 24. Winch; 25. Wire rope; 3. Support mechanism; 31. Transmission roller; 32. Support seat; 33. Roller; 34. Transmission mechanism; 35. Limit block; 4. Weight block; 5. Bottom bridge; 6. Hydraulic cylinder; 7. Mountain. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The purpose of the utility model is to provide a new type of gravity energy storage system to solve the problems existing in the above-mentioned prior art, which can provide more stable support for heavy objects lifted to high altitudes, and improve the gravity energy storage capacity, thereby improving the power generation effect and economic benefits.

[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1 to Figure 5 As shown, this embodiment provides a new type of gravity energy storage system, including a top bridge 1 arranged between two adjacent base buildings, a receiving cavity arranged on the two base buildings, a lifting power generation mechanism 2 and a supporting mechanism 3. Among them, the receiving cavity is located below the top bridge 1, and the receiving cavities on the two base buildings are of the same height and are arranged opposite to each other. The lifting power generation mechanism 2 is located on the top bridge 1, and the output end is used to connect the steel cable 25 of the heavy object block 4. The lifting power generation mechanism 2 includes a power generation device and is connected to the power grid. The supporting mechanism 3 is slidably arranged in the receiving cavity along the span direction of the top bridge 1, and multiple supporting mechanisms 3 are arranged horizontally side by side in a direction perpendicular to the span of the top bridge 1. Multiple supporting mechanisms 3 can be arranged in one receiving cavity, and the receiving cavity can also be arranged in multiples corresponding to the number of supporting mechanisms 3. The inner end of the supporting mechanism 3 is connected to the telescopic end of the telescopic mechanism, and the telescopic movement of the telescopic mechanism can drive the supporting mechanism 3 to reciprocate in the receiving cavity. The outer end of the support mechanism 3 can extend out of the accommodating cavity, and a plurality of transmission rollers 31 are arranged on the upper surface of the outer end of the support mechanism 3. The transmission rollers 31 are connected to the transmission mechanism 34, and the transmission mechanism 34 may include a transmission motor and a plurality of transmission wheels. Each transmission shaft is coaxially fixed with a transmission wheel, and the output shaft of the transmission motor is connected to the transmission wheel in a transmission connection manner. The transmission connection may be in the form of a chain drive or a gear drive, so that when the transmission motor is working, the plurality of transmission rollers 31 are driven to rotate synchronously in the same direction. The rotation axes of the plurality of transmission rollers 31 are arranged along the span direction of the top bridge 1, and the transmission direction of the plurality of transmission rollers 31 is the same as the arrangement direction of the plurality of support mechanisms 3.

[0034] In the low-valley electricity price stage, the lifting and power generation mechanism 2 uses electric energy to lift the heavy object block 4 to a position close to the top bridge 1, and then the telescopic mechanism is activated to push the support mechanism 3 out of the accommodating chamber. The outer ends of the support mechanisms 3 in the two accommodating chambers extend a certain length and are located below the heavy object block 4. The lifting and power generation mechanism 2 places the heavy object block 4 on the support mechanism 3, disconnects the connection with the heavy object block 4, and uses the support mechanism 3 to support the heavy object block 4. After the lifting and power generation mechanism 2 is disconnected from the weight, the transmission mechanism 34 drives the transmission roller 31 to rotate and transports the heavy object block 4 to the transmission roller 31 of the adjacent support mechanism 3. Then the support mechanism 3 directly below the lifting and power generation mechanism 2 retracts into the accommodating chamber, and the lifting and power generation mechanism 2 lifts another heavy object block 4 again, repeating the above process until the support mechanisms 3 are all loaded with heavy objects 4 or the low-valley electricity price stage ends. In the peak electricity price stage, the heavy object block 4 is suspended on the lifting and power generation mechanism 2, and the heavy object block 4 slowly falls, driving the internal rotor of the lifting and power generation mechanism 2 to rotate to generate electricity. After one weight block 4 has descended to the bottom, the steel cable 25 on the lifting power generation mechanism 2 is retracted, and another weight block 4 is lowered to generate electricity, until all the weight blocks 4 are lowered or the peak electricity price phase ends.

[0035] Therefore, this embodiment can support the heavy blocks 4 lifted to a high place by setting a retractable support mechanism 3, thereby improving the stability of the heavy blocks 4 at high altitudes; and by using the transmission roller 31 set at the outer end of the support mechanism 3, the heavy blocks 4 in the air can be transported to the adjacent support mechanism 3, so that the lifting and power generation mechanism 2 can lift multiple heavy blocks 4 and place them on different support mechanisms 3, thereby achieving an increase in the number of lifting and power generation mechanisms 2 without increasing the number of lifting and power generation mechanisms 2, improving the gravity energy storage capacity, and then improving the energy release power generation capacity and economic benefits.

[0036] Further, such as Figure 3 to Figure 5 As shown, in this embodiment, a plurality of supporting mechanisms 3 arranged side by side form a supporting group. Along the horizontal conveying direction of the weight block 4 on the driving roller 31, limiting blocks 35 are arranged at both ends of the supporting group. The top height of the limiting blocks 35 is higher than the bottom height of the weight block 4, which can limit the weight block 4 and prevent the weight block 4 from falling due to excessive conveyance on the driving roller 31.

[0037] The base building in this embodiment is a mountain 7. The top bridge 1 is built by using two adjacent mountains 7, and a cave is opened on the mountain 7 to form a receiving cavity to accommodate the supporting mechanism 3. This can reduce the construction cost of the new gravity energy storage system, occupy a small mountain area, and is more environmentally friendly.

[0038] Furthermore, the support mechanism 3 in this embodiment includes a support seat 32, the inner end of the support seat 32 is connected to the telescopic end of the telescopic mechanism, and the outer end is provided with a transmission roller 31; the height of the support seat 32 is adapted to the height of the accommodating cavity, and the base structure itself is used to ensure the stability of the support seat 32 to prevent the support seat 32 from becoming unstable under the pressure of the weight block 4. In order to facilitate the reciprocating movement of the support seat 32, a plurality of horizontally arranged rollers 33 are provided at the bottom of the support seat 32 in this embodiment. The telescopic mechanism in this embodiment is a hydraulic cylinder 6.

[0039] Furthermore, the present embodiment further comprises a bottom bridge 5 disposed between two mountains 7, the bottom bridge 5 being located below the accommodating cavity and directly facing the top bridge 1 up and down. The bottom bridge 5 is used to place the weight block 4; in order to cushion the falling weight block 4, a cushion for cushioning the weight block 4 is disposed on the bottom bridge 5.

[0040] In this embodiment, the lifting and power generation mechanism 2 includes a generator motor 21, the output end of the generator motor 21 is connected to a gearbox, and the output shaft of the gearbox is connected to a steel cable 25. A hook is provided at the end of the steel cable 25, and a fixing ring for connecting the hook is provided at the top of the weight block 4. When the generator motor 21 is used as a motor, the weight block 4 is lifted; when the generator motor 21 is used as a generator, the weight block 4 is lowered. The generator motor 21 is an existing device, and this embodiment does not limit this; and the disassembly and connection between the hook and the fixing ring can be manually operated.

[0041] In this embodiment, the output end pinion 22 of the generator motor 21 meshes with a large gear 23, and the large gear 23 is coaxially connected with a winch 24 for winding a steel cable 25. It should be noted that during the power generation process of the weight block 4, the transmission ratio between the large gear 23 and the pinion 22 is relatively large, and the weight block 4 descends very slowly, and no obvious speed increase will occur; and under the buffering effect of the buffer pad on the bottom bridge 5, the weight block 4 will not have a large impact on the bottom bridge 5.

[0042] Furthermore, in this embodiment, multiple groups of generator motors 21 are arranged on the top bridge 1. In the energy release and power generation stage, when one generator motor 21 lowers a heavy block 4 onto the bottom bridge 5, another generator motor 21 lowers another heavy block 4, so as to realize the continuous lowering of the heavy block 4, and then realize continuous power generation, so as to ensure the stability of the output power and reduce the impact on the power grid. In the lifting and energy storage stage, multiple generator motors 21 can be concentrated to lift the heavy block 4 synchronously, or they can be lifted in batches.

[0043] Adaptive changes made according to actual needs are all within the protection scope of this utility model.

[0044] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A new type of gravity energy storage system, characterized in that: It includes a top bridge arranged between two adjacent base buildings, a accommodating cavity arranged on the two base buildings, a lifting and power generation mechanism and a supporting mechanism, wherein the accommodating cavity is located below the top bridge; the lifting and power generation mechanism is located on the top bridge and is provided with a steel cable for connecting a heavy object; the supporting mechanism is slidably arranged in the accommodating cavity along the span direction of the top bridge, and a plurality of supporting mechanisms are horizontally arranged side by side in a direction perpendicular to the span of the top bridge, the inner end of the supporting mechanism is connected to the telescopic end of the telescopic mechanism, the outer end of the supporting mechanism can extend out of the accommodating cavity, and a plurality of transmission rollers are arranged on the upper surface of the outer end of the supporting mechanism, the transmission rollers are connected to the transmission mechanism, and the rotating axes of the plurality of transmission rollers are arranged along the span direction of the top bridge.

2. The novel gravity energy storage system according to claim 1 is characterized in that: The support mechanism comprises a support seat, the inner end of the support seat is connected to the telescopic end of the telescopic mechanism, and the outer end is provided with the transmission roller; the height of the support seat is adapted to the height of the accommodating cavity.

3. The novel gravity energy storage system according to claim 2 is characterized in that: A plurality of horizontally arranged rollers are arranged at the bottom of the supporting seat.

4. The novel gravity energy storage system according to claim 1 is characterized in that: A plurality of support mechanisms arranged side by side form a support group. Limit blocks are arranged at both ends of the support group along the horizontal conveying direction of the weight block. The top height of the limit block is higher than the bottom height of the weight block.

5. The novel gravity energy storage system according to claim 1 is characterized in that: The telescopic mechanism is a hydraulic cylinder.

6. The novel gravity energy storage system according to claim 1 is characterized in that: It also includes a bottom bridge arranged between the two base buildings, the bottom bridge is located below the accommodating cavity and is directly opposite to the top bridge up and down; a buffer pad for buffering the heavy block is arranged on the bottom bridge.

7. The novel gravity energy storage system according to any one of claims 1 to 6, characterized in that: The lifting power generation mechanism comprises a generator motor, an output end of the generator motor is connected to a gearbox, and an output shaft of the gearbox is connected to a steel cable.

8. The novel gravity energy storage system according to claim 7 is characterized in that: A hook is arranged at the end of the steel cable, and a fixing ring for connecting the hook is arranged at the top of the weight block.

9. The novel gravity energy storage system according to claim 1 is characterized in that: A plurality of lifting power generation mechanisms are arranged on the top bridge.

10. The novel gravity energy storage system according to claim 1 is characterized in that: The base building is a mountain.

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