Weight energy storage device in vertical shaft
Through the lifting and adjustment of pulleys and trolleys, the structure of heavy energy storage devices is simplified, the existing equipment costs and safety hazards are solved, and efficient power grid power balance and electricity price difference utilization are achieved.
Patent Information
- Application Number
- CN202222324183.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2022-09-01
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2032-09-01
AI Technical Summary
Existing equipment based on heavy objects energy storage requires special three-dimensional lifting equipment, which is costly and unsafe to stack heavy objects, which poses safety hazards.
The lifting adjustment method of pulleys and trolleys is adopted to replace the three-dimensional lifting equipment. The pulleys arranged in the longitudinal direction of the rotating shaft convert the lifting force in multiple directions into the direction of the motor, simplifying the structure, saving costs, and using the fixed tracks in the vertical shaft to achieve heavy objects Efficient stacking and extraction.
The initial construction investment of energy storage equipment is reduced, safety accidents caused by excessive stacking height of heavy objects are avoided, and the power consumption of peaks and troughs of power grids is achieved, and the electricity price difference is used to provide higher benefits.
Smart Images
Figure CN222276855U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gravity energy storage, and in particular relates to a heavy object energy storage device arranged in a vertical shaft. Background Art
[0002] At present, energy storage methods can be roughly divided into three main forms: chemical battery energy storage, physical energy storage, and power-to-fuel energy storage. The energy storage cost of electrochemical energy storage is relatively low, but its safety and environmental protection are still the focus of attention in large-scale energy storage applications; power-to-fuel energy storage is developing rapidly and is suitable for ultra-long-term energy transfer; physical energy storage is suitable for grid peak regulation and day and night power transfer. Physical energy storage mainly includes heavy object energy storage, pumped water energy storage, compressed air energy storage, flywheel energy storage, electromagnetic energy storage, etc. As a physical energy storage method, heavy object energy storage has the advantages of inherent safety and flexible site selection. It also has the advantages of zero self-discharge rate, large energy storage capacity, and high discharge depth. In recent years, it has received more and more attention at home and abroad.
[0003] Gravity energy storage is the most widely used and most mature large-scale energy storage technology, with the advantages of large energy storage capacity, high power, low cost and high efficiency. The basic component of the heavy object energy storage system is the heavy object lifting system. When the electricity price is low, the electric motor is used to lift the heavy object to a high potential energy position, and the electrical energy is converted into potential energy for storage; when the electricity price is high, the heavy object at the high potential energy position is lowered, and the generator rotor is pulled to rotate during the descent, converting the potential energy into electrical energy.
[0004] The existing technology generally adopts the mode of stacking heavy objects on the ground with lifting equipment, but this mode has the following problems:
[0005] Existing equipment based on heavy object energy storage often requires special three-dimensional lifting equipment, which is costly and requires a large investment. In addition, the heavy blocks are stacked high above the ground, which is unsafe. Utility Model Content
[0006] The purpose of the utility model is to provide a heavy object energy storage device in a shaft. The energy storage device of the utility model adopts a hoisting adjustment method based on pulleys and trolleys to replace the existing three-dimensional hoisting equipment. The structure is simpler. The utility model adopts a pulley arranged longitudinally on the rotating shaft as a direction adjustment mechanism. A single pulley can convert the hoisting force from multiple directions on one side of the shaft to the direction of the motor. The structure is ingenious and cost-saving. The device of the utility model can not only balance the peak and valley power consumption of the power grid, and use the price difference between day and night to provide higher benefits, but also solve the problems raised in the above-mentioned background technology.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] A heavy object energy storage device in a shaft, characterized in that the device comprises: an electric generator, a gearbox, a steering pulley, a pulling rope, a position control vehicle, a pulley, a movable guide beam, a fixed track, a heavy object, an upper layer of the shaft, and a bottom layer of the shaft;
[0009] The electric generator and the gearbox are connected to each other through a transmission lock sleeve, one end of the pulling rope is wound around the steel cable winch of the gearbox, passing through the steering pulley and the pulley installed on the position control vehicle, and the other end of the pulling rope is hung on the weight, wherein the rotation axis of the pulley is horizontally arranged, and the rotation axis of the steering pulley is vertically arranged;
[0010] The pulley is fixed on the position control vehicle, the position control vehicle is arranged on the movable guide rail beam, and the movable guide rail beam is arranged on the fixed track. The movement of the position control vehicle and the movable guide rail beam is controlled by a general control console on the ground surface, so that the position control vehicle can reach directly above all the heavy objects in the shaft;
[0011] The upper layer and the bottom layer of the shaft are located in the shaft with a height difference between them, and are used for stacking the heavy objects.
[0012] Furthermore, the gearbox is arranged between the electric generator and the steering pulley to adjust the rotation speed of the electric generator.
[0013] Furthermore, a bearing is provided on a connecting rod between the position control vehicle and the pulley, so that the pulley rotates along a vertical axis.
[0014] Furthermore, the steering pulley is a horizontal pulley, which converts the pulling rope in any horizontal direction into a horizontal fixed direction, and the horizontal fixed direction is a cable winch pointing from the steering pulley to the gearbox.
[0015] Furthermore, the fixed track consists of two guide rails which are placed in parallel and fixed along the outer edge of the shaft.
[0016] Furthermore, the movable guide rail includes a guide rail and a translational electric-controlled vehicle fixed at both ends of the guide rail. The translational electric-controlled vehicle is arranged on the fixed rail and is controlled by the main control room on the surface to move at a fixed point on the fixed rail. After reaching the designated position, the movable guide rail beam is fixed on the fixed rail, and the fixing method can be achieved by snapping or braking.
[0017] Furthermore, the fixed track is realized by a limit movable groove arranged at the edge of the shaft, and the translation electric-controlled vehicle moves in the limit movable groove and brakes at a fixed point.
[0018] Preferably, the movable guide rail beam comprises a guide rail beam and a translational electric-controlled vehicle fixed at both ends of the guide rail beam, wherein the guide rail beam body is a hollow structure composed of two or more long rails, and the hollow area of the guide rail beam is the moving area of the pulley.
[0019] Preferably, the weight is a standard block made of a solid, dense material, or is composed of a solid, corrosion-resistant standard container filled with powdered or block material.
[0020] Furthermore, the upper layer of the shaft and the bottom layer of the shaft are both flat layers with solid bottom surfaces.
[0021] When the energy storage device of the utility model is used: during the peak electricity price period, the weight is dropped from the height of the upper layer 10 of the shaft to the height of the bottom layer 11 of the shaft, the falling weight 9 drives the gearbox 2 and the electric generator 1 to rotate, and the gravitational potential energy is converted into electrical energy, and the electricity is output to the outside of the system, and the above steps are repeated to move many weights from the upper layer 10 of the shaft to the bottom layer 11 of the shaft, so as to realize continuous power generation of the weights; during the valley electricity price period, the electric generator 1 drives the pulling rope 4 to pull the weight 9 upward, and lifts the weight 9 from the bottom layer 11 of the shaft to the height of the upper layer 10 of the shaft, so as to realize the energy storage of the weight, and the above steps are repeated to move many weights from the bottom layer 11 of the shaft to the upper layer 10 of the shaft, so as to realize the continuous energy storage of the weight.
[0022] Compared with the prior art, the utility model has the following advantages:
[0023] 1. The energy storage device described in the utility model adopts a hoisting adjustment method based on pulleys and trolleys, replacing the existing three-dimensional hoisting equipment, and has a simpler structure;
[0024] 2. The heavy objects used in the utility model can be made from local materials and cheap water can be used as the load, which greatly reduces the initial construction investment of the energy storage power station. In addition, the heavy object box can also be used as storage in the later stage;
[0025] 3. The vertical shaft can expand its area along the fixed track direction, and reduce the stacking height of heavy objects without reducing the energy storage effect, so as to avoid safety accidents caused by the collapse of heavy object stacking. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 , is a schematic diagram of the vertical cross-section structure of the utility model
[0027] Figure 2 , is a top view of the utility model
[0028] Figure 3 , is the structural diagram of the steering pulley
[0029] Figure 4 , Side view of the movable guide rail beam in another embodiment
[0030] Figure 5 , A top view of the movable guide rail beam and the position control vehicle in another embodiment
[0031] Figure 1 and Figure 2 In: 1. Electric generator; 2. Gearbox; 3. Steering pulley; 4. Pulling rope; 5. Position control vehicle; 6. Pulley; 7. Movable guide beam; 8. Fixed track; 9. Heavy object; 10. Upper level of the shaft; 11. Bottom level of the shaft.
[0032] Figure 3 Middle: 31, bracket; 32, steering wheel; 33, pulley shaft.
[0033] Figure 4 Middle: 71. Guide rail beam; 72. Translational electric-controlled vehicle.
[0034] Figure 5 Middle: 51, control car cross beam; 71, guide rail beam. DETAILED DESCRIPTION
[0035] 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.
[0036] See also Figure 1 and Figure 2 The heavy object energy storage device in the vertical shaft provided by the utility model includes: 1. an electric generator; 2. a gearbox; 3. a steering pulley; 4. a pulling rope (such as a steel wire rope); 5. a positioning vehicle; 6. a pulley; 7. a movable guide beam; 8. a fixed track; 9. a heavy object; 10. an upper layer of the vertical shaft; 11. a bottom layer of the vertical shaft.
[0037] The electric generator 1, gearbox 2, steering pulley 3, position control vehicle 5, pulley 6, movable guide beam 7, and fixed track 8 are all arranged above the ground surface, and the heavy object 9 is arranged in a vertical shaft below the ground surface. The vertical shaft includes two platforms, an upper layer 10 and a bottom layer 11 of the vertical shaft, for stacking the heavy object 9.
[0038] The rotor of the electric generator 1 and the gearbox 2 are connected through a transmission lock sleeve. A steel cable winch is arranged on the gearbox 2, on which a steel wire rope 4 is wound, and the three work synchronously; a weight 9 is hung on the other end of the steel wire rope 4, and as the gearbox winds or releases the steel wire rope 4, the weight 9 rises or falls; the steel wire rope 4 is connected from the weight 9 to the gearbox 2 and needs to be turned twice, passing through the pulley 6 and the steering pulley 3 in turn. The pulley 6 is a vertical pulley, which turns the steel wire rope 4 from the vertical direction to the horizontal direction, and the steering pulley 3 is a horizontal pulley, which turns the steel wire rope 4 in any horizontal direction It turns to a horizontal fixed direction, and the fixed direction is from the steering pulley to the gearbox 2; the pulley 6 is fixed on the position control vehicle 5, and the relative position remains unchanged, but the pulley 6 can rotate around the vertical axis; the position control vehicle 5 is installed on the movable guide rail beam 7 and can move along the length direction of the beam. The movable guide rail beam 7 is supported on the fixed track 8. The movement of the position control vehicle 5 along the first direction (parallel to the paper surface) and the movable guide rail beam 7 along the second direction (perpendicular to the paper surface) is controlled by the main control console on the ground to ensure that the position control vehicle 5 can reach directly above all the heavy objects in the shaft.
[0039] The electric generator 1 is a motor having both the functions of a generator and a motor. The motor function is reflected in that after power is turned on, the stator rotates to drive the gearbox 2 to rotate, and the gearbox 2 pulls the winch to drive the wire rope 4 to lift the weight 9, so that the electric energy is converted into the potential energy of the weight 9 and outputs energy to the outside; the generator function is reflected in that the weight 10 falls, the wire rope 4 drives the gearbox 2 to rotate, and the gearbox 2 drives the stator of the electric generator 1 to rotate together through the rope, and the stator rotates to generate electricity. Thus, the power of the power grid is used or the power grid is transmitted.
[0040] The gearbox 2 is used to adjust the speed of the electric generator 1. The gearbox 2 has a transmission shaft, one end of which is connected to the rotating shaft of the electric generator 1 through a transmission rope, and the other end is fixedly connected to a wire rope winch on the gearbox, and the wire rope winch is a fixed end winding disk of the wire rope 4.
[0041] The structure of the diverting pulley 3 is as follows Figure 3 As shown, it includes a bracket 31, a steering wheel 32, and a pulley shaft 33, wherein the bracket 31 is fixed on the foundation, a steel wire rope 4 is wound around the steering wheel 32, and the pulley shaft 33 is connected to the steering wheel 32 or the bracket 31 by a bearing.
[0042] The steering wheel 32 is a steering device for the steel wire rope 4. When the position control vehicle 5 is at different positions, the direction of the steel wire rope 4 pointing to the steering pulley 3 is different. After the steering wheel 32 is turned, the direction of the steel wire rope 4 pointing to the gearbox 2 remains fixed.
[0043] The position control vehicle 5 is arranged on the movable guide rail beam 7, and is connected to the pulley 6 by bypassing the movable guide rail beam 7 on one side or wrapping the movable guide rail beam 7 on both sides. The moving position of the position control vehicle 5 can be controlled by the main control room, and the fixed point limitation of the position control vehicle 5 on the movable guide rail beam 7 can be achieved by snapping or braking.
[0044] The rotating shaft of the pulley 6 is connected to the position control vehicle 5. The connecting rod of the position control vehicle 5 connecting the pulley 6 is divided into two sections, the upper and lower sections are connected by a bearing or a rotatable buckle. The pulley 6 can rotate along the vertical axis as a whole to ensure that the slide groove plane of the pulley 6 can point to the steering pulley 3 at any specified position of the position control vehicle 5. The pulley 6 can be a single pulley or a pulley group.
[0045] The movable track beam 7 includes a guide rail and a translation electric control vehicle arranged at both ends of the guide rail. Figure 4 As shown, the translation electric-controlled vehicle can push the movable guide rail beam 7 to move on the fixed rail 8.
[0046] The fixed track 8 is composed of two guide rails, which are placed and fixed in parallel along the long edge of the shaft, and the movable guide rail beam 7 can be controlled to move to a fixed point on the fixed track 8 through the main control room on the surface. After reaching the specified position, the movable guide rail beam 7 is fixed on the fixed track 8, and the fixing method can be achieved by snapping or braking.
[0047] The selection of the weight 9 is determined according to the energy storage scale design. Preferably, a strong and dense material can be selected, such as a standard block cast from scrap steel, or a strong and corrosion-resistant standard container can be set up, and the container is filled with dense granular materials, such as iron ore or rock.
[0048] Preferably, in order to reduce the initial investment in the system engineering or adjust the water resource utilization rate in the rainy season and the dry season, the weight 9 can also be a sturdy and corrosion-resistant standard container filled with water.
[0049] The hanging end of the steel wire rope 4 is provided with a hook, which can automatically or semi-automatically clamp the clamping port on the weight 9, and can also automatically release the clamping of the weight 9.
[0050] The vertical shaft comprises an upper layer 10 and a bottom layer 11, both of which are flat layers with solid bottom surfaces. Preferably, the vertical shaft can be 50 to 1000 meters deep and can be designed according to the energy storage scale of the entire equipment and the geographical conditions.
[0051] Furthermore, the main control room is located on the ground, and the electric generator 1, the gearbox 2, the position control vehicle 5, the movable guide beam 7, the hook on the wire rope 4, etc. are controlled by the electrical control components inside the main control room.
[0052] Preferably, the use process of this embodiment includes a power generation process and an energy storage process.
[0053] The above power generation process is as follows: during the peak electricity price period, the main control room controls the movable guide beam 7 and the position control vehicle 5 to reach the specified position on the upper level 10 of the shaft, the electric generator 1 drives the gearbox 2 to rotate to release the rope to hang the weight 9, and lifts it to an appropriate height, so that the position control vehicle 5 moves parallel to the top of the bottom level 11 of the shaft, and the electric generator 1 drives the gearbox to synchronously retract the rope to ensure that the height of the weight remains unchanged, and reaches above the specified position on the bottom level 11 of the shaft. The weight 9 falls and drives the gearbox 2 and the electric generator 1 to rotate, and the gravitational potential energy is converted into electrical energy, and electricity is output to the outside of the system. Repeat the above steps to move many weights from the upper level 10 of the shaft to the bottom level 11 of the shaft, so as to realize continuous power generation of the weights.
[0054] The above energy storage process is as follows: during the off-peak electricity price period, the main control room controls the movable guide beam 7 and the position control vehicle 5 to reach the specified position on the bottom layer 11 of the shaft, the electric generator 1 drives the gearbox 2 to rotate to release the rope and hang the weight 9, the electric generator 1 rotates in the opposite direction to collect the rope, the rotor of the electric generator 1 rotates to convert electrical energy into kinetic energy, drives the gearbox 2 to work, the gearbox 2 rotates to wrap the wire rope 4, the wire rope 4 pulls the weight 9 up, and after reaching the specified height, the position control vehicle 5 moves to the specified location on the upper layer 10 of the shaft, the electric generator 1 drives the gearbox 2 to rotate to release the rope, places the weight 9 on the platform on the upper layer 10 of the shaft and unhooks the weight 9, repeats the above steps to move many weights from the bottom layer 11 of the shaft to the upper layer 10 of the shaft, and realizes continuous energy storage of the weights.
[0055] The above energy storage process is repeated until the off-peak electricity price period ends or all the heavy objects in the bottom layer 11 of the shaft are moved to the upper layer 10 of the shaft.
[0056] In another embodiment, a fixed rail, such as a protruding rail or a limit movable groove, is provided under the movable guide rail beam 7, so that the movable guide rail beam 7 can move laterally and brake at a fixed point.
[0057] In another embodiment, if Figure 4 , 5 As shown, the movable guide rail beam 7 includes a guide rail beam 71 and a translation electric-controlled vehicle 72 fixed at both ends of the guide rail beam, wherein the main body of the guide rail beam 71 is a strip-shaped hollow structure composed of two or more long rails, and the hollow area of the guide rail frame 71 is the moving area of the pulley 6.
[0058] The energy storage device of the utility model adopts a hoisting adjustment method based on a pulley 6, a position control vehicle 5 and a movable guide rail beam 7, replacing the existing three-dimensional hoisting equipment, greatly simplifying the difficulty of implementation, and by adopting a steering pulley 3 as a direction adjustment mechanism, the hoisting force from multiple directions on one side of the shaft is converted to the direction toward the motor, thereby optimizing the work efficiency. The utility model has an ingenious structure and saves costs. The device of the utility model can not only balance the peak and valley power consumption of the power grid, and use the price difference between day and night to provide higher benefits, but also can solve the problems raised in the above-mentioned background technology.
[0059] It should be noted that the shapes of the various components in the drawings of the present invention are schematic, and it is not excluded that there are certain differences between them and their actual shapes. The drawings are only used to illustrate the principle of the present invention, and the specific details of the components shown in the drawings are not intended to limit the scope of protection of the utility model. Those skilled in the art should also understand that the above embodiments are only explanations of the schematic implementation of the present invention, and are not intended to limit the scope of the present invention.
Claims
1. A heavy object energy storage device in a shaft, characterized in that: The device comprises: an electric generator, a gearbox, a steering pulley, a pulling rope, a position control vehicle, a pulley, a movable guide rail beam, a fixed rail, a weight, an upper layer of a shaft, and a bottom layer of a shaft; The electric generator and the gearbox are connected to each other through a transmission lock sleeve, one end of the pulling rope is wound around the steel cable winch of the gearbox, passing through the steering pulley and the pulley installed on the position control vehicle, and the other end of the pulling rope is hung on the weight, wherein the rotation axis of the pulley is horizontally arranged, and the rotation axis of the steering pulley is vertically arranged; The pulley is fixed on the position control vehicle, the position control vehicle is arranged on the movable guide rail, and the movable guide rail beam is arranged on the fixed rail. By controlling the movement of the position control vehicle along the first direction and the movable guide rail beam along the second direction, the position control vehicle can reach directly above all the heavy objects in the shaft; The upper layer and the bottom layer of the shaft are located in the shaft, and there is a height difference between them, and they are used to stack the heavy objects. The movable guide rail beam includes a guide rail and a translational electric-controlled vehicle fixed at both ends of the guide rail. The translational electric-controlled vehicle is set on the fixed rail and is controlled by the main control room on the ground to move at a fixed point on the fixed rail. After reaching the specified position, the movable guide rail is fixed on the fixed rail by snapping or braking.
2. The heavy object energy storage device in a vertical shaft according to claim 1, characterized in that: The gearbox is arranged between the electric generator and the steering pulley to adjust the rotation speed of the electric generator.
3. The heavy object energy storage device in a vertical shaft according to claim 1, characterized in that: The position control vehicle is connected to the connecting rod of the pulley by a bearing, so that the pulley rotates along the vertical axis.
4. The heavy object energy storage device in a vertical shaft according to claim 1, characterized in that: The steering pulley is a horizontal pulley, which turns the pulling rope in any horizontal direction into a horizontal fixed direction, and the horizontal fixed direction is the direction from the steering pulley to the cable winch of the gearbox.
5. The heavy object energy storage device in a vertical shaft according to claim 1, characterized in that: The fixed track consists of two guide rails which are placed parallel and fixed along the outer edge of the shaft.
6. The heavy object energy storage device in a vertical shaft according to claim 1, characterized in that: The fixed track is realized by a limit moving groove arranged at the edge of the shaft, and the translation electric control vehicle moves in the limit moving groove and brakes at a fixed point.
7. The heavy object energy storage device in a vertical shaft according to claim 1, characterized in that: The movable guide rail comprises a guide rail frame and a translational electric-controlled vehicle with both ends of the guide rail frame fixed, wherein the guide rail frame body is a strip-shaped hollow structure composed of two or more long rails, and the hollow area of the guide rail frame is the moving area of the pulley.
8. The heavy object energy storage device in a vertical shaft according to claim 1, characterized in that: The weight is a standard block made of a solid, high-density material, or is composed of a solid, corrosion-resistant standard container filled with powdered or block materials.
9. The heavy object energy storage device in a vertical shaft according to claim 1, characterized in that: The upper layer of the shaft and the bottom layer of the shaft are both flat layers with solid bottom surfaces.