Rail type gravity energy storage built-in power station

Abstract

The utility model discloses a rail type gravity energy storage built-in power station which is arranged under parallel rails, two rows of driving plates are arranged at the bottom of a rail train, the power station comprises a box body, a supporting base and two groups of power generation assemblies arranged on the supporting base, and each power generation assembly comprises a friction wheel, a transmission piece, a power generator and a power storage device. The friction wheels are arranged on the top of the supporting base in a sliding mode through friction wheel seats, the two generators are longitudinally arranged on the two sides of the supporting base, the generator on each side is in transmission connection with the friction wheel on the same side through a corresponding transmission piece, and the friction wheel seats are further connected with mechanical tensioners. And the friction wheel and the driving plate are in compression friction connection under the action of the mechanical tensioner. According to the utility model, the power station is arranged in the track and is vertically mounted, so that the occupied width of the power station in gravity energy storage is reduced, and the geographical adaptability of track arrangement is improved.

Description

Technical Field

[0001] The utility model relates to the field of gravity energy storage power generation, in particular to a track-type gravity energy storage built-in power station. Background Art

[0002] With the rapid development of my country's national economy, the types and number of electrical equipment have increased dramatically, causing the peak-valley difference of the power grid to continue to increase, which not only aggravates the difficulty of peak regulation of the power grid, but also brings huge challenges to the stability of the power grid. The energy storage system can store energy when the power grid has excess energy and release energy when the power grid needs it. The millisecond-level power dynamic compensation capability of the advanced energy storage system can greatly improve the instability problems caused by the randomness, volatility and intermittency of renewable energy power generation to the power grid. In the power market environment, peak-valley electricity prices are implemented. The energy storage system can store the excess electricity generated after the power source participates in the grid dispatch at a low electricity price, and merge it into the grid when there is a dispatch demand or high electricity price, participate in peak regulation, and maximize the benefits of distributed power generation.

[0003] Gravity energy storage, as a new type of long-term, large-capacity energy storage method, has the advantages of high safety, high efficiency, long life, and short construction period. The basic process of energy storage is: using surplus electricity to drive the motor to pull up heavy objects, converting it into high-level potential energy storage; releasing the heavy objects to generate electricity. Due to its large energy storage capacity, long output time, and low unit energy cost, it can accurately track grid dispatch instructions.

[0004] In rail-type gravity energy storage, the power station is arranged on the side of the track, which is a conventional power station design. However, there are certain requirements for the slope width. However, the actual gravity energy storage system is often used in places with narrow tunnels such as mines with high and low drops. Therefore, the external power station is obviously not suitable. Therefore, designing a power station that is suitable for narrow slope widths has become the technical problem that this application aims to solve. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a rail-type gravity energy storage built-in power station, the power station is set just below the parallel track, the track is provided with a rail train running from the top of the track to the bottom of the track, and two rows of drive plates are provided at the bottom of the rail train.

[0006] The power station includes a box buried directly below the track, a support base arranged in the box, and two groups of power generation components symmetrically arranged on the support base. The power generation components include friction wheels, transmission parts, generators, and storage devices electrically connected to the generators. The friction wheels are slidably arranged on the top of the support base through friction wheel seats. Two generators are longitudinally arranged on both sides of the support base. The generators on each side are connected to the friction wheels on the same side through corresponding transmission parts. The connecting axes of the two friction wheels are perpendicular to the track. The friction wheel seats are also connected to mechanical tensioners. When generating electricity, the rail train travels to the power station, and the friction wheels and the drive plates are pressed and frictionally connected under the action of the mechanical tensioners.

[0007] Furthermore, the support base is in an inverted "Y" shape, and the generators of the two groups of power generation components are symmetrically arranged on the two oblique sides of the inverted "Y"-shaped support base. The friction wheel and the generator are installed and connected at an angle through a transmission member.

[0008] Furthermore, the transmission member adopts a universal cross-shaft telescopic coupling, the upper end of the transmission member is connected to the friction wheel shaft, and the lower end is connected to the generator shaft.

[0009] Furthermore, the mechanical tensioner includes a tensioning rope assembly and a pressure adjustment assembly, one end of the tensioning rope assembly is connected to the friction wheel seat of the power station and is arranged in the box, and the pressure adjustment assembly is connected to the other end of the tensioning rope assembly and is arranged on the outside of the track, and the pressure adjustment assembly controls the tensioning rope assembly to drive the friction wheel to press toward the drive plate on the rail train.

[0010] Furthermore, the tensioning rope assembly includes a tensioning steel wire rope, parallel slide rails arranged on the top table of the support base, and two groups of parallel sliders arranged on the slide rails, each group of parallel sliders is connected to a corresponding friction wheel seat, the parallel slide rails are perpendicular to the track in the horizontal direction, and a movable pulley 1 is installed on the opposite side of the two friction wheel seats in the direction of the slide rails, and at least one fixed pulley 1 is provided on the inner wall of the box. One end of the tensioning steel wire rope is fixed in the box, and the other end passes around the movable pulley 1 closest to the fixed end, then passes around the fixed pulley 1, and then passes around another movable pulley 1, and then goes out to be connected to the pressure adjustment assembly.

[0011] Furthermore, the tightening adjustment assembly includes a weight frame and several weight blocks, the weight frame is fixedly installed on the outer side of the track at the corresponding power station, and at least two fixed pulleys 2 are provided on the weight frame, one fixed pulley 2 is provided below the weight frame, and the other fixed pulley 2 is provided on the top of the weight frame. The weight frame is also provided with a branch rod, and a weight line is connected to the branch rod. One end of the weight line is fixed on the branch rod, and the other end is supported by movable pulley 2 and connected to several weight blocks. After the tensioning wire rope comes out of the box, it is successively wrapped around the fixed pulley 2 below the weight frame and the fixed pulley 2 above the weight frame, and then connected to the movable pulley 2 through the pulley frame.

[0012] Furthermore, four fixed pulleys 1 are arranged on the inner wall of the box, and the four fixed pulleys 1 are evenly divided into two groups, which are respectively arranged on the inside of the box opposite to the two movable pulleys 1.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model sets the commonly used external power station inside the track and adopts vertical installation, which reduces the width of the power station in the gravity energy storage and improves the geographical adaptability of the track layout. The friction wheel and the generator are connected by a universal cross-shaped retractable coupling, so that the friction wheel and the generator are installed at an angle, which increases the installation space of the generator, so that a generator with larger power and size can be set in the optional configuration of the generator. In addition, the installation method of the generator and the friction wheel at an angle in the vertical direction increases the height of the power station box, but reduces the length and width of the power station and reduces the floor space. At the same time, the reduction in the length and width of the power station can make its load-bearing frame more rigid and less prone to deformation, so that when a train passes by, there is less vibration and the operation is smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the power station of the utility model;

[0016] Figure 2 This is a schematic structural diagram of the power generation assembly of the present utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the connection between the power station box and the track of the utility model;

[0018] Figure 4 This is a structural diagram of a flatbed transport vehicle for a rail train of the present invention;

[0019] Figure 5 This is a schematic diagram of the overall structure of the power station track line of the utility model.

[0020] The reference numerals are as follows:

[0021] Track 1, rail car 2, box 3, support base 4, mechanical tensioner 5, friction wheel 61, transmission part 62, generator 63, slide rail 71, slider 72, friction wheel seat 73, movable pulley 1 74, fixed pulley 1 75, tensioning wire rope 76, weight frame 81, weight block 82, fixed pulley 2 83, branch rod 84, weight line 85, movable pulley 2 86, frame 91, loading plate 92, wheel set 93, drive plate 94. DETAILED DESCRIPTION

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figure 1-Figure 5 As shown, a rail-type gravity energy storage built-in power station includes a power station arranged directly below a parallel track 1, a rail train 2 is arranged on the track 1, and the rail train 2 travels from above the track 1 to below the track 1. The rail train 2 is connected by multiple flatbed transport vehicles through universal joints. Each flatbed transport vehicle includes a frame 91, a loading plate 92 arranged on the frame 91, wheel sets 93 installed on both sides of the bottom of the frame 91, and two rows of drive plates 94 arranged in the middle of the bottom of the frame 91.

[0026] The power station includes a box 3 buried under the track 1, a support base 4 arranged in the box 3, and two groups of power generation components symmetrically arranged on the support base 4. The power generation components are arranged between the two drive plates 94, and the power generation components are connected to the mechanical tensioner 5. When the rail train 2 enters the power generation working mode, the mechanical tensioner 5 drives the power generation components to be pressed toward the drive plate on the rail train 2. The mechanical tensioner 5 includes a tensioning rope assembly and a pressure adjustment assembly. The tensioning rope assembly is connected to the power generation assembly and arranged in the box 3. The pressure adjustment assembly is connected to the tensioning rope assembly and is arranged on the outside of the track 1.

[0027] The power generation assembly includes a friction wheel 61, a transmission member 62, a generator 63 and a storage device electrically connected to the generator 63. The support base 4 is used to fix the generator 63, the friction wheel 61 and the transmission member 62. The friction wheel 61 is slidably connected to the top table of the support base 4 through the friction wheel seat 73. The friction wheel seat 73 is connected to the tensioning rope assembly. The friction wheel seat 73 can drive the friction wheel 61 to slide on the top of the support base 4 through the tensioning rope assembly. When generating electricity, the friction wheel 61 and the corresponding drive plate 94 are pressed tightly under the action of the tensioning rope assembly. The axial direction of the friction wheel 61 is perpendicular to the drive plate. The two generators 63 are longitudinally arranged on both sides below the support base 4 and are connected to the friction wheel 61 through the transmission member 62.

[0028] In this embodiment, in order to increase the installation space of the generator 63, the support base 4 is in an inverted "Y" shape, and the generators 63 of the two groups of power generation components are symmetrically arranged on the two oblique sides of the inverted "Y"-shaped support base 4. The friction wheel 61 and the generator 63 are installed and connected at an angle through the transmission member 62. The transmission member 62 adopts a universal cross-axis telescopic coupling. The upper end of the transmission member 62 is connected to the rotating shaft of the friction wheel 61, and the lower end is connected to the rotating shaft of the generator 63.

[0029] In this embodiment, a low-speed generator 63 can directly match the speed of the friction wheel 61, and a gearbox is no longer needed. Instead, a universal cross-shaft telescopic coupling is used to connect the friction wheel 61 and the generator 63, so that the friction wheel 61 and the generator 63 can be installed at an angle, thereby increasing the installation space of the generator 63, so that a generator with larger power and size can be set in the optional configuration of the generator 63.

[0030] In this embodiment, a commonly used external power station is set inside the track and installed vertically, which reduces the width of the power station in the gravity energy storage and improves the geographical adaptability of the track layout. The installation method of the power generation component at an angle to the vertical direction increases the height of the power station box 3, but reduces the length and width of the power station, reducing the floor space. At the same time, the reduction in the length and width of the power station can make its load-bearing frame more rigid and less prone to deformation. When a train passes by, there is less vibration and the operation is smoother. This power station installation method is suitable for areas with narrow geographical locations and improves the geographical adaptability of the track layout.

[0031] In this embodiment, the tensioning rope assembly includes a parallel slide rail 71 arranged on the top table of the support base 4, and two groups of parallel sliders 72 arranged on the slide rail 71. Each group of parallel sliders 72 is connected to a friction wheel seat 73, and the two friction wheels 61 are installed on the corresponding friction wheel seat 73. The parallel slide rail 71 is perpendicular to the track 1 in the horizontal direction. The two friction wheel seats 73 are each equipped with a movable pulley 74 on the opposite side of the slide rail 71. At least one fixed pulley 75 is provided on the inner wall of the box body 3. The movable pulley 74 and the fixed pulley 75 are connected to the pressure adjustment assembly through a tensioning wire rope 76. One end of the tensioning wire rope 76 is fixed in the box body 3, and the other end passes around the movable pulley 74 closest to the fixed end, then passes around the fixed pulley 75, and then passes around another movable pulley 74 and then goes out to connect to the pressure adjustment assembly.

[0032] The compression adjustment assembly includes a weight frame 81 and several weight blocks 82. The weight frame 81 is fixedly installed on the outside of the track 1 at the corresponding power station. At least two fixed pulleys 83 are provided on the weight frame 81. One fixed pulley 83 is provided below the weight frame 81, and the other fixed pulley 83 is provided on the top of the weight frame 81. The weight frame 81 is also provided with a branch rod 84, and a weight line 85 is connected to the branch rod 84. One end of the weight line 85 is fixed on the branch rod 84, and the other end is supported by a movable pulley 86 and connected to several weight blocks 82.

[0033] After the tensioning wire rope 76 leaves the box body 3, it is passed through the fixed pulley 2 83 below the weight frame 81 and the fixed pulley 2 83 above it in sequence, and then connected to the movable pulley 2 86 through the pulley frame body.

[0034] Four fixed pulleys 75 are arranged on the inner wall of the box body 3. The four fixed pulleys 75 are evenly divided into two groups and are respectively arranged on the inside of the box body 3 opposite to the two movable pulleys 74.

[0035] In this embodiment, the box body 3 of the power station is installed and fixed in the track 1, and its installation height is lower than the ground surface. The mechanical tensioner contains 7 fixed pulleys and 3 movable pulleys, which are formed by winding the tensioning wire rope 76. The tensioning size is controlled by a number of weight blocks 82 on the weight line 85, and the number of weight blocks 82 can be manually removed or increased.

[0036] The gravity energy storage system is equipped with a master controller, and its drive plate 94 is equipped with a pressure sensor. When the rail train 2 is fully loaded with block materials, it moves downward under the action of its own gravity. When it passes the power station, the drive plate 94 on the train squeezes and rubs to drive the friction wheel 61, transmitting the power of the rail train 2 and the materials to the friction wheel 61 and outputting torque, which is then transmitted to the generator 63 through the transmission member 62 to generate electricity. During the operation of the rail train 2, the pressure sensor can collect the current clamping force and compare it with the preset clamping force. By manually increasing or decreasing the number of weights 82 to adjust the tensioning force, the appropriate clamping force is maintained to ensure the smooth operation of the rail train 2. In the two operating states of no load and full load, the train has different power, and the power input to the generator 63 can be adjusted and controlled by the electronic control system of the generator 63.

[0037] Since the transportation path of the rail train 2 remains unchanged during power generation and transportation, in actual applications, the tensioning force of the drive plate 94 and the friction wheel 61 can remain basically unchanged after the initial adjustment. The current gravity energy storage system is often deployed in mining areas and high-altitude and high-sea areas. The conventionally used hydraulic tensioning device has a wide range of applications and has the advantages of small size, light weight, compact structure, large output thrust, and real-time control of thrust size. However, it also has shortcomings such as hydraulic oil leakage and a small operating temperature range. The operating temperature of the hydraulic system is generally controlled between 15 degrees and 65 degrees, while the working environment of the gravity energy storage system is outdoors, and the ambient temperature often drops below zero degrees Celsius. When the hydraulic oil temperature is too low, the viscosity of the hydraulic oil increases, the fluidity is poor, the resistance is large, the working efficiency is low, and it is easy to damage the hydraulic motor, valves, pipelines, etc. Therefore, the tensioning device in this embodiment is a purely mechanical structure, which is not affected by the ambient temperature and has the advantages of simple structure, low cost, easy maintenance, and reliable use. The mechanical tensioner has a simple structure and does not require a complex control system and sensor. When in use, the number and weight of the weights are adjusted according to the train operation conditions. It only needs to ensure that the clamping force is slightly larger, and it can be used for a long time after one adjustment. At the same time, the clamping adjustment component and the power generation component are separated and installed outside the track 1, which is convenient for maintenance and adjustment and is more suitable for the environment of the gravity energy storage project.

[0038] When the main controller of the transportation system receives feedback from the pressure sensor that there is an abnormality in the clamping force, the main controller feeds back to the maintenance personnel. The maintenance personnel, based on the abnormal feedback position of the pressure sensor, finds that the clamping force is too small. By adding a heavy hammer block 82, the tensioning wire rope 76 is tightened downward, so that the movable pulley 74 of the friction wheel seat 4 drives the friction wheel 61 toward the drive plate 94 under the drive of the tensioning wire rope 76, thereby increasing the clamping force. After several rounds of adjustments and actual feedback from the rail train, the optimal clamping force is finally achieved. On the contrary, when the clamping force is too large, the actual requirement is met by reducing the heavy hammer block.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A rail-type gravity energy storage built-in power station, characterized by: The power station is set directly below the parallel track. A rail train is set on the track and runs from the top of the track to the bottom of the track. Two rows of driving plates are set at the bottom of the rail train. The power station includes a box buried directly below the track, a support base arranged in the box, and two groups of power generation components symmetrically arranged on the support base. The power generation components include friction wheels, transmission parts, generators, and storage devices electrically connected to the generators. The friction wheels are slidably arranged on the top of the support base through friction wheel seats. Two generators are longitudinally arranged on both sides of the support base. The generators on each side are connected to the friction wheels on the same side through corresponding transmission parts. The connecting axes of the two friction wheels are perpendicular to the track. The friction wheel seats are also connected to mechanical tensioners. When generating electricity, the rail train travels to the power station, and the friction wheels and the drive plates are pressed and frictionally connected under the action of the mechanical tensioners.

2. A rail-type gravity energy storage built-in power station as claimed in claim 1, characterized in that: The support base is in an inverted "Y" shape, and the generators of the two groups of power generation components are symmetrically arranged on the two oblique sides of the inverted "Y"-shaped support base. The friction wheel and the generator are installed and connected at an angle through a transmission member.

3. A rail-type gravity energy storage built-in power station as claimed in claim 2, characterized in that: The transmission member adopts a universal cross shaft telescopic coupling, the upper end of the transmission member is connected to the friction wheel shaft, and the lower end is connected to the generator shaft.

4. A rail-type gravity energy storage built-in power station according to claim 1, characterized in that: The mechanical tensioner includes a tensioning rope assembly and a pressure adjustment assembly. One end of the tensioning rope assembly is connected to the friction wheel seat of the power station and is arranged in a box. The pressure adjustment assembly is connected to the other end of the tensioning rope assembly and is arranged outside the track. The pressure adjustment assembly controls the tensioning rope assembly to drive the friction wheel to press toward the drive plate on the rail train.

5. A rail-type gravity energy storage built-in power station as claimed in claim 4, characterized in that: The tensioning rope assembly includes a tensioning steel wire rope, parallel slide rails arranged on the top table of the support base, and two groups of parallel sliders arranged on the slide rails, each group of parallel sliders is connected to a corresponding friction wheel seat, the parallel slide rails are perpendicular to the track in the horizontal direction, and a movable pulley 1 is installed on the opposite side of the two friction wheel seats in the direction of the slide rails. At least one fixed pulley 1 is provided on the inner wall of the box. One end of the tensioning steel wire rope is fixed in the box, and the other end passes around the movable pulley 1 closest to the fixed end, then passes around the fixed pulley 1, and then passes around another movable pulley 1, and then goes out to be connected to the pressure adjustment assembly.

6. A rail-type gravity energy storage built-in power station as claimed in claim 5, characterized in that: The compression adjustment assembly includes a weight frame and several weight blocks. The weight frame is fixedly installed on the outer side of the track at the corresponding power station. At least two fixed pulleys 2 are provided on the weight frame, one fixed pulley 2 is provided below the weight frame, and the other fixed pulley 2 is provided on the top of the weight frame. The weight frame is also provided with a branch rod, and a weight line is connected to the branch rod. One end of the weight line is fixed to the branch rod, and the other end is supported by the movable pulley 2 and connected to several weight blocks. After the tensioning wire rope comes out of the box, it is sequentially wrapped around the fixed pulley 2 below the weight frame and the fixed pulley 2 above the weight frame, and then connected to the movable pulley 2 through the pulley frame body.

7. A rail-type gravity energy storage built-in power station as claimed in claim 6, characterized in that: Four fixed pulleys 1 are arranged on the inner wall of the box, and the four fixed pulleys 1 are evenly divided into two groups, which are respectively arranged on the inside of the box opposite to the two movable pulleys 1.

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