阅读说明：本技术 一种利用山地高度落差的重力储能系统及运行方法 (Gravity energy storage system utilizing mountain height drop and operation method ) 是由 刘杰 杨浩宇 梁宸铭 李雪峰 邓子谦 唐旎 杜卓兴 李运舟 石谦 于 2021-01-09 设计创作，主要内容包括：本发明提供了一种利用山地高度落差的重力储能系统及运行方法,它包括具有一定高度且结构心态稳定的山体；在山体上布置安装有用于储存和释放储能物质的收集下落系统；所述收集下落系统与用于发电的发电系统相连；所述发电系统通过与用于对储能物质进行提升的抬升系统相连；所述抬升系统与收集下落系统相连。此储能系统主要依靠将需存储的能量转化为重力势能,最终通过储能物质的自由降落释放其重力势能,使用这种储能方式,在长时间的储能过程中不会产生较大的能量损失,而且现有技术完全有能力实现此种储能方式。(The invention provides a gravity energy storage system utilizing the height fall of a mountain and an operation method thereof, comprising a mountain body with a certain height and stable structural heart; a collecting and falling system for storing and releasing energy storage substances is arranged and mounted on the mountain; the collecting and dropping system is connected with a power generation system for power generation; the power generation system is connected with a lifting system used for lifting the energy storage substance; the lifting system is connected with the collecting and dropping system. The energy storage system mainly converts energy to be stored into gravitational potential energy, and finally releases the gravitational potential energy through free fall of energy storage substances.)

1. The gravity energy storage system utilizing the height difference of the mountainous region is characterized in that: it comprises a mountain body (1) with a certain height and stable structural heart state;

a collecting and falling system for storing and releasing energy storage substances (2) is arranged and mounted on the mountain body (1);

the collecting and dropping system is connected with a power generation system for power generation;

the power generation system is connected with a lifting system used for lifting the energy storage substance (2);

the lifting system is connected with the collecting and dropping system.

2. The gravity energy storage system utilizing the mountain height drop as claimed in claim 1, wherein: the collecting and falling system comprises an on-mountain collector (4) fixed at the top of the mountain body (1), the center part of the bottom of the on-mountain collector (4) is communicated with a falling pipe (5), and the falling pipe (5) is arranged along the elevation direction of the mountain body (1); an electric valve (6) used for controlling the release of the energy storage material (2) is arranged between the dropping pipe (5) and the bottom outlet of the mountain top collector (4).

3. The gravity energy storage system utilizing the mountain height drop as claimed in claim 2, wherein: the mountain collector (4) is stably supported on top of the mountain collector (4) by a plurality of support structure members (3).

4. The gravity energy storage system utilizing the height difference of the mountainous region as claimed in claim 1 or 2, wherein: the mountain-mounted collector (4) is a quarter-sphere metal closed container, the top panel of the metal closed container is of an inwards-concave arc structure, and a through hole for injecting the energy storage substance (2) is processed in the top panel.

5. The gravity energy storage system utilizing the mountain height drop as claimed in claim 1, wherein: the power generation system comprises a power generation system shell (10), wherein a mechanical generator (9) is arranged inside the power generation system shell (10), a main shaft of the mechanical generator (9) is provided with a receiving fan blade (8) used for driving the mechanical generator to rotate, the power generation system shell (10) is communicated with a dropping pipe (5) used for collecting a dropping system, and is impacted and rotated by the receiving fan blade (8) through an energy storage material (2), a hard inclined plane (11) is arranged at the bottom of the power generation system shell (10), and the low end of the hard inclined plane (11) is communicated with a lifting system.

6. The gravity energy storage system utilizing the height difference of the mountainous region as claimed in claim 1 or 5, wherein: the lifting system comprises a mountain collector (7), the mountain collector (7) is communicated with a power generation system shell (10) of the power generation system through a ball inlet pipe (12), the mountain collector (7) is communicated with a leakage-proof shell (18), a conveying belt (15) used for lifting energy storage substances (2) is arranged inside the leakage-proof shell (18), lifting plates (14) which are uniformly distributed are arranged on the conveying belt (15), the lifting plates (14) are in contact with the leakage-proof shell (18), and the conveying belt (15) is connected with a power device used for driving the conveying belt to rotate; the top outlet of the leakproof shell (18) is connected with the mountain collector (4) through a ball outlet pipe (13).

7. The gravity energy storage system utilizing the mountain height drop as claimed in claim 6, wherein: the power device comprises a driving shaft (16) and a driven shaft (17) which are arranged inside a leakage-proof shell (18), and the transmission belt (15) is meshed with belt wheels on the driving shaft (16) and the driven shaft (17) for transmission and drives the driving shaft (16) and the driven shaft to rotate.

8. The gravity energy storage system utilizing the mountain height drop as claimed in claim 5, wherein: the drop tube (5) consists of two sections of stainless steel round tubes which are smoothly connected; the contact part of the energy storage substance in the drop pipe (5) is coated with a solid lubricating coating.

9. The gravity energy storage system utilizing the mountain height drop as claimed in claim 1, wherein: the energy storage material (2) is a mixture of a steel ball and low-viscosity lubricating oil, the energy storage material (2) is transmitted among systems, and the diameter of the energy storage material (2) is 1/3-1/2 smaller than that of the dropping pipe (5).

10. A method of operating a gravity energy storage system using a fall in the height of a mountain according to any one of claims 1 to 9, comprising the steps of:

step1, idle check: checking whether the device is intact, and starting transfer checking to check whether the device normally operates;

step2, opening the electric valve (6): the electric valve (6) is opened through a wireless signal, and the energy storage material (2) begins to fall from the bottom of the mountain top collector (4) from the initial position of the dropping pipe (5);

step3, energy storage substance (2) falling: opening the electric valve (6) to enable the energy storage material to fall along the dropping pipe, and receiving the fan blades (8);

step4, energy conversion: the receiving fan blade (8) rotates under the impact of the energy storage substance (2) and drives the mechanical generator (9), and the mechanical generator (9) converts the mechanical energy into electric energy which is continuously and stably transmitted;

step5, collecting and storing: all energy storage substances (2) enter the mountain collector (7) along the hard inclined plane (11) and are lifted when external electric energy is surplus;

step6, opening the valve: when the external electric energy is left, opening an electric valve at the tail end of the downhill collector to enable the energy storage substance to enter the lifting system;

step7, energy storage lifting: the lifting system is operated by utilizing external electric energy, and the energy storage material (2) is lifted by the lifting plate (14);

step8, collecting energy storage substances (2): the energy storage material is lifted to the top by the lifting plate (14), enters the mountain collector (4) through the ball outlet pipe (13) and is used when external electric energy is insufficient.

Technical Field

The invention relates to a gravity energy storage system utilizing mountain height drop and an operation method, and belongs to the technical field of energy storage.

Background

With the continuous development of society, people must rely on sufficient electric energy for activities such as daily life production, scientific research and the like, and the electric energy is of indispensable importance for the development of human beings. At present, the main sources of electric energy are fire energy, hydraulic energy, wind energy, tidal energy and the like, the thermal power generation needs to consume huge coal resources and can discharge certain atmospheric pollutants, and other power generation modes are influenced by natural factors, so that the time period when the electric energy is generated to supply more than demand is prolonged, and the emergency of storing the redundant electric energy when the supply is more than demand is important in the emergency period.

In the existing energy storage technology, energy is stored by depending on a battery, for example, in an energy storage system provided in patent 201610164264.X, a plurality of energy storage units adopting a super capacitor are used for storing energy, and the energy storage mode has a large energy loss in a long-time energy storage state; there are also energy storage methods relying on compressed air, such as 201711157263.3, which mainly uses an air compressor to store energy as compressed heat energy, and finally releases the energy by expansion work of an expander.

Disclosure of Invention

The invention aims to provide a gravity energy storage system and a method utilizing the height drop of mountainous regions, the energy storage system mainly converts energy to be stored into gravitational potential energy, and finally releases the gravitational potential energy through the free fall of energy storage materials.

In order to achieve the technical features, the invention is realized as follows: a gravity energy storage system utilizing the height fall of a mountain land comprises a mountain body with a certain height and a stable structural heart state;

a collecting and falling system for storing and releasing energy storage substances is arranged and mounted on the mountain;

the collecting and dropping system is connected with a power generation system for power generation;

the power generation system is connected with a lifting system used for lifting the energy storage substance;

the lifting system is connected with the collecting and dropping system.

The collecting and falling system comprises an on-mountain collector fixed at the top of a mountain body, the center part of the bottom of the on-mountain collector is communicated with a falling pipe, and the falling pipe is arranged along the elevation direction of the mountain body; an electric valve for controlling the release of the energy storage substance is arranged between the dropping pipe and the bottom outlet of the mountain collector.

The mountain collector is stably supported on top of the mountain collector by a plurality of support structural members.

The mountain-mounted collector is a quarter-sphere metal closed container, a top panel of the metal closed container is of an inwards-concave arc structure, and a through hole for injecting energy storage materials is processed in the top panel.

The power generation system comprises a power generation system shell, a mechanical generator is arranged in the power generation system shell, a main shaft of the mechanical generator is provided with a receiving fan blade used for driving the mechanical generator to rotate, the power generation system shell is communicated with a dropping pipe used for collecting a dropping system, and the receiving fan blade is impacted and rotated through an energy storage substance pair, a hard inclined plane is arranged at the bottom of the power generation system shell, and the low end of the hard inclined plane is communicated with the lifting system.

The lifting system comprises a mountain collector, the mountain collector is communicated with a power generation system shell of the power generation system through a ball inlet pipe, the mountain collector is communicated with a leakage-proof shell, a conveying belt used for lifting energy storage substances is arranged in the leakage-proof shell, uniformly distributed lifting plates are arranged on the conveying belt, the lifting plates are in contact with the leakage-proof shell, and the conveying belt is connected with a power device used for driving the conveying belt to rotate; and the top outlet of the leakproof shell is connected with the mountain collector through a ball outlet pipe.

The power device comprises a driving shaft and a driven shaft which are arranged inside the leakage-proof shell, and the transmission belt is meshed with belt wheels on the driving shaft and the driven shaft for transmission and drives the driving shaft and the driven shaft to rotate.

The drop tube consists of two sections of stainless steel round tubes which are smoothly connected; the contact part of the energy storage substance inside the dropping pipe is coated with a solid lubricating coating.

The energy storage material is a mixture of a steel ball and low-viscosity lubricating oil, is transmitted among systems, and has a diameter which is 1/3-1/2 smaller than that of the dropping pipe.

The operation method of the gravity energy storage system by utilizing the height drop of the mountainous region comprises the following steps:

step1, idle check: checking whether the device is intact, and starting transfer checking to check whether the device normally operates;

step2, opening the electric valve: the electric valve is opened through a wireless signal, and the energy storage material begins to fall from the bottom of the mountain collector from the initial position of the dropping pipe;

step3, energy storage substance falling: opening the electric valve to enable the energy storage material to fall along the dropping pipe, so as to receive the fan blades;

step4, energy conversion: receiving the rotation of the fan blades under the impact of the energy storage substance, and driving a mechanical generator, wherein the mechanical generator converts the mechanical energy into electric energy which is continuously and stably transmitted;

step5, collecting and storing: all energy storage substances enter the mountain collector along the hard inclined plane and are lifted when external electric energy is excessive;

step6, opening the valve: when the external electric energy is left, opening an electric valve at the tail end of the downhill collector to enable the energy storage substance to enter the lifting system;

step7, energy storage lifting: the lifting system is operated by utilizing external electric energy, and the energy storage material is lifted by the lifting plate;

step8, collecting energy storage substances: the energy storage material is lifted to the top by the lifting plate, enters the mountain collector through the ball outlet pipe and is used when external electric energy is insufficient.

The invention has the following beneficial effects:

1. the invention adopts a mechanical device to realize lifting operation, has mature technology, safety and reliability, and long system working year limit. The cost of high-strength steel can be greatly reduced by the repeated use of the transmission belt. The anti-leakage shell in the system can protect the lifting system, and the mountain body cannot be damaged even if the energy storage substance falls due to accidental breakage of the transmission belt. The lifting system is arranged on the surface of a mountain body instead of the inside, the maintenance is convenient, and the service life of the lifting system can reach decades. The power generation system is arranged in the mountain body, is not easy to be damaged, and stably outputs electric energy through the electric wire.

2. The energy cycle efficiency is high, and the uniform output of electric power can be realized. The whole process mainly comprises two actions of lifting a heavy object by the motor and driving the mechanical generator by the falling of the heavy object, and the system efficiency is far higher than that of a hydropower station. Through the lifting and falling of the energy storage substance, the storage and stable output of the electric power can be realized.

3. The ultra-large capacity energy storage can be realized, and the energy density is high. Although the weight of the single energy storage material is not large, the total energy storage amount can be increased according to the actual increase of the amount of the energy storage material.

4. The operation process is pollution-free, the stored energy is stored safely and is stored for a long time without loss, and the problems of environmental pollution and service life times of battery power storage are avoided. The energy storage material is a static material without the risk of sudden breakage and release.

5. The method has wide application geographic range, reduces the use of precious plain resources, such as cross-sectional mountains and other positions in the southwest part of China, and can provide the best energy storage mode for electric energy storage.

6. In conclusion, the mountain energy storage device utilizes the height fall of the mountain land and realizes the electric energy storage by lifting the energy storage material in a mechanical motion mode, can effectively overcome the problems of low system safety coefficient, high cost and excessive land area occupation in the prior art, and is particularly suitable for being implemented in mountain areas with the height of kilometers and stability.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of a power generation system.

FIG. 3 is a schematic view of a mountain collector configuration.

Figure 4 is a schematic diagram of a lift system configuration.

In the figure: the device comprises a mountain body 1, an energy storage substance 2, a supporting structure component 3, an on-mountain collector 4, a dropping pipe 5, an electric valve 6, an off-mountain collector 7, a receiving fan blade 8, a mechanical generator 9, a power generation system shell 10, a hard inclined plane 11, a ball inlet pipe 12, a ball outlet pipe 13, a lifting plate 14, a transmission belt 15, a driving shaft 16, a driven shaft 17 and a leakage-proof shell 18.

Detailed Description

Embodiments of the present invention will be further described with reference to the accompanying drawings.

Example 1:

referring to fig. 1 to 4, a gravity energy storage system using a height drop of a mountain, which includes a mountain 1 having a certain height and a stable structural attitude; a collecting and falling system for storing and releasing energy storage substances 2 is arranged and mounted on the mountain body 1; the collecting and dropping system is connected with a power generation system for power generation; the power generation system is connected with a lifting system used for lifting the energy storage substance 2; the lifting system is connected with the collecting and dropping system. Through adopting foretell gravity energy storage system, it can be when the electric energy is abundant, drives the lifting system through the electric energy and promotes energy storage material 2 to store it at mountain 1 top, when the power consumption peak, through releasing energy storage material 2, drive power generation system generates electricity, and then produces the electric energy, guarantees the resupply of electric energy, finally reaches the purpose of energy storage.

Further, the collecting and falling system comprises an on-mountain collector 4 fixed at the top of the mountain body 1, the bottom center part of the on-mountain collector 4 is communicated with a falling pipe 5, and the falling pipe 5 is arranged along the elevation direction of the mountain body 1; an electric valve 6 for controlling the release of the energy storage substance 2 is arranged between the dropping pipe 5 and the bottom outlet of the mountain collector 4. The electric valve 6 is a wireless signal receiving device, the electric valve 6 is controlled through a wireless signal terminal, and the electric valve 6 and the wireless signal terminal are powered through a storage battery. The collecting and falling system is mainly used for storing the energy storage substance 2, and ensuring that the energy storage substance can be released after being stored for a certain amount, so that the gravitational potential energy is converted into kinetic energy.

Further, the mountain collector 4 is stably supported on top of the mountain collector 4 by a plurality of support structure members 3. The stability and reliability of the support of the mountain collector 4 are ensured by the above structure.

Further, the mountain collector 4 is a quarter-sphere metal closed container, a top panel of the metal closed container is of an inwards concave arc structure, and a through hole for injecting the energy storage material 2 is processed on the top panel. The smoothness of the collection process is ensured by the above-described mountain collector 4.

Further, the power generation system comprises a power generation system shell 10, a mechanical generator 9 is arranged inside the power generation system shell 10, a main shaft of the mechanical generator 9 is provided with a receiving fan blade 8 used for driving the mechanical generator to rotate, the power generation system shell 10 is communicated with a dropping pipe 5 used for collecting a dropping system and is used for impacting and rotating the receiving fan blade 8 through an energy storage material 2, a hard inclined plane 11 is arranged at the bottom of the power generation system shell 10, and the lower end of the hard inclined plane 11 is communicated with the lifting system. Preferably, the shape of the fan blade receiving part 8 is a streamline structure and is made of a titanium alloy material. The mass of the titanium alloy fan blade is concentrated at the tail end of the fan. The mechanical generator 9 is a double-fed induction generator equipped with a voltage stabilizing converter. The hard inclined plane 11 is a metal inclined plane which forms an angle of about fifteen degrees with the horizontal ground, and the width of the hard inclined plane 11 is reduced along with the descending of the plane. The lifting plate 14 is of a circular structure in appearance, is connected with the transmission belt 15 at equal intervals, and is attached to the driving shaft 16 and the driven shaft 17 to realize transmission. The driven shaft 17 is installed obliquely above the driving shaft 16. The bottom of the initial section of the ball outlet pipe 13 is provided with a circular hole with the diameter equal to that of the lifting plate, and the upper part of the initial section is connected with the leakage-proof shell 18. The power generation system can be used for converting kinetic energy into electric energy.

Further, the lifting system comprises a mountain collector 7, the mountain collector 7 is communicated with a power generation system shell 10 of the power generation system through a ball inlet pipe 12, the mountain collector 7 is communicated with a leakage-proof shell 18, a conveying belt 15 used for lifting the energy storage material 2 is arranged inside the leakage-proof shell 18, lifting plates 14 which are uniformly distributed are arranged on the conveying belt 15, the lifting plates 14 are in contact with the leakage-proof shell 18, and the conveying belt 15 is connected with a power device used for driving the conveying belt to rotate; the top end outlet of the leakproof shell 18 is connected with the mountain collector 4 through a ball outlet pipe 13. The lifting system can be driven by electric energy when the electric energy is abundant, and finally, the electric energy is converted into gravitational potential energy so as to be convenient for subsequent power generation.

Further, the power device comprises a driving shaft 16 and a driven shaft 17 which are arranged inside the leakproof shell 18, and the transmission belt 15 is simultaneously meshed with belt wheels on the driving shaft 16 and the driven shaft 17 for transmission and drives the driving shaft 16 and the driven shaft to rotate. The drive shaft 16 is connected with a motor and drives the rotation of the motor. In the working process, the driving shaft 16 is driven by the motor, the driven shaft 17 is driven by the driving shaft 16, the belt wheel is driven by the driven shaft 17, and the transmission belt 15 is driven.

Further, the drop tube 5 is composed of two sections of stainless steel round tubes which are smoothly connected; the contact part of the energy storage substance in the drop pipe 5 is coated with a solid lubricating coating. The dropping pipe 5 with the structure ensures that the energy storage substance 2 can smoothly drop and converts gravitational potential energy into kinetic energy.

Furthermore, the energy storage material 2 is a mixture of steel balls and low-viscosity lubricating oil, and the diameter of the energy storage material 2 is 1/3-1/2 smaller than that of the dropping pipe 5, and the energy storage material 2 is transmitted among systems. By adopting the energy storage substance 2, high-efficiency energy storage is realized while certain fluidity is ensured, so that the energy storage density is improved, and the energy storage effect is ensured.

Example 2:

the operation method of the gravity energy storage system by utilizing the height drop of the mountainous region comprises the following steps:

step1, idle check: checking whether the device is intact, and starting transfer checking to check whether the device normally operates;

step2, opening the electric valve 6: the electric valve 6 is opened through a wireless signal, and the energy storage material 2 begins to fall from the bottom of the mountain top collector 4 from the initial position of the dropping pipe 5;

step3, the energy storage substance 2 falls: the electric valve 6 is opened to enable the energy storage material to fall along the dropping pipe, and the energy storage material is received by the fan blade 8;

step4, energy conversion: receiving the rotation of the fan blade 8 under the impact of the energy storage substance 2, and driving the mechanical generator 9, wherein the mechanical generator 9 converts the mechanical energy into electric energy which is continuously and stably transmitted;

step5, collecting and storing: all the energy storage substances 2 enter the mountain collector 7 along the hard inclined plane 11 and are lifted when external electric energy is surplus;

step6, opening the valve: when the external electric energy is left, opening an electric valve at the tail end of the downhill collector to enable the energy storage substance to enter the lifting system;

step7, energy storage lifting: the lifting system is operated by using external electric energy, and the energy storage substance 2 is lifted by the lifting plate 14;

step8, energy storage material 2 collection: the energy storage substance is lifted to the top by the lifting plate 14, enters the mountain collector 4 through the ball outlet pipe 13 and is used when the external electric energy is insufficient.

Example 3:

the invention can realize the storage of electric energy by connecting a wind driven generator and the like nearby through a cable. The invention can also be connected with a power grid through a cable to participate in peak clipping and valley filling of the electric energy of the power grid.

The working process of the system is as follows: checking whether the device is intact, and starting transfer to check whether the device normally operates. The valve is opened through a wireless signal, and the energy storage material begins to fall from the bottom of the mountain collector from the initial position of the dropping pipe. The electric valve is opened to make the energy storage material fall down along the dropping pipe and be received by the receiving fan blade. The receiving fan blades rotate to drive the mechanical generator, and the mechanical generator converts mechanical energy into electric energy which is continuously and stably transmitted. All energy storage materials enter the mountain collector along the hard inclined plane and rise when external electric energy is surplus. When the external electric energy is left, the electric valve at the tail end of the downhill collector is opened, so that the energy storage material enters the lifting system. The lifting system is operated by utilizing external electric energy, and the energy storage material is lifted by the lifting plate. Collecting substances: the energy storage material is lifted to the top by the lifting plate, enters the mountain collector through the ball outlet pipe and is used when external electric energy is insufficient.

The specific process is as follows: at the trough period at night, the driving shaft is firstly enabled to start to rotate, and the transmission belt and the lifting plate are actively driven to start to move. And then an electric valve at the tail end of the mountain collector is opened, the energy storage material enters the driving shaft through the ball inlet pipe and is naturally lifted upwards by the lifting plate. After the energy storage material is lifted to the top, the energy storage material enters the mountain collector along the lifting plate and the ball outlet pipe under the action of gravity. The above operations are repeated until all the energy storage material in the downhill collector is transferred to the uphill collector. And in the daytime electric wave crest period, an electric valve at the tail end of the mountain collector is opened through a wireless signal. The energy storage material falls down in sequence by the dropping pipe and continuously hits the receiving fan blades to drive the fan blades to rotate. The mechanical generator connected to the receiving fan shaft converts gravitational potential energy into electrical energy. In order to avoid impact on the power grid, the quantity of falling energy storage substances can be reasonably planned, and smoother power input and output can be realized. The fallen energy storage substance enters the mountain collector along the hard slope for the next electric power trough period.