Cage supporting and stabilizing device for kilometer-level vertical shaft gravity energy storage system cage

Abstract

The utility model discloses a cage supporting and stabilizing device for a kilometer-level vertical shaft gravity energy storage system cage, which comprises a shaft bottom cage supporting and stabilizing device, and the shaft bottom cage supporting and stabilizing device comprises a vertical support. The vertical support is connected with a cage supporting table capable of being controlled to ascend and descend, and the upper end of the cage supporting table is a cage supporting face used for making contact with the bottom face of a cage. A cage stabilizing clamp capable of being controlled to be opened and closed is connected to the cage supporting table, the upper portion of the cage stabilizing clamp is higher than the cage supporting face, and the opposite side face of the upper portion of the cage stabilizing clamp is a cage clamping face used for making contact with the side face of a cage. According to the scheme, the cage is supported and stabilized at the starting and ending moments of lifting / lowering in the gravity energy storage / release process, the cage is prevented from swinging when the cage is started and released, and the friction transmission safety of the kilometer-level lifting gravity energy storage system is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gravity energy storage, and concretely relates to a kind of thousand-meter vertical shaft gravity energy storage system cage for supporting cage stabilizing device. BACKGROUND

[0002] The vertical shaft gravity energy storage technology can realize the stable and controllable conversion of gravitational potential energy and electrical energy by circulating lifting and lowering heavy objects through lifting system, can flexibly dispatch heavy blocks for energy storage / release, and has the advantages of large application scale, low cost, long service life, long energy storage time and no self-discharge. The multi-rope friction type double cage lifting system is an important part of the vertical shaft gravity energy storage system, mainly responsible for lifting / lowering heavy objects during energy storage / release. During energy storage, the permanent magnet motor drives the friction wheel to rotate, and through the friction force between the steel wire rope and the friction lining on the friction wheel, the alternating lifting / lowering of the loaded cage and the empty cage is driven, which can efficiently and stably convert electrical energy into gravitational potential energy for storage. The cage is a key component for carrying heavy objects during the operation of the multi-rope friction type double cage lifting system, and the degree of stability of its operation directly affects the efficiency of gravity energy storage. Since the vertical shaft is as deep as one kilometer, when the loaded / empty cage is lowered to the bottom of the shaft, the length of the suspended lifting steel wire rope is large, making the cage more likely to sway. During energy storage / release, the gravitational difference between the loaded cage on one side and the empty cage on the other side is very large, resulting in a large difference in the tension of the steel wire ropes on both sides during the lifting / lowering of the loaded cage. At this time, the steel wire rope is prone to slipping and the loaded cage is at risk of falling downward, which will seriously affect the efficient and safe production of deep mines and cause huge economic losses. Therefore, a thousand-meter vertical shaft gravity energy storage system cage supporting and stabilizing device is needed to stabilize the cage when it is lowered to the bottom of the shaft and apply an upward force to it during the lifting of the loaded cage, while applying a downward force to the empty cage on the other side, reducing the tension difference of the lifting steel wire rope between the loaded cage and the empty cage, ensuring the stability of the cage in the multi-rope friction type double cage lifting system, and having important significance for improving the efficiency of the vertical shaft gravity energy storage system.

[0003] Chinese utility model patent No. 201420394173.1 discloses a cage-supporting device for vertical shaft cage conveyors. It employs a hydraulic cylinder structure, where the hooks of the lifting arm on a support frame located inside the shaft engage with the slots of the cage support plate, thereby supporting the cage while limiting its upward rebound. This solution is only suitable for single-cage lifting, and the hydraulic cylinder structure results in low working efficiency. It also fails to solve the problem of lateral cage swaying, leading to poor device flexibility. Chinese utility model patent No. 201520027753.1 discloses a cage-supporting device for mines. This device includes two sets of opposing cage-supporting units. When the container collides with the anti-collision beam, the downward movement of the container is limited and buffered by the opening and closing of the claws in the cage-supporting units and the compression of the disc spring in the piston cylinder. However, this device is difficult to install and has low operational safety. If the cage support fails, it will lead to a serious cage fall accident. Chinese invention patent No. 201710144173.4 discloses an overwinding buffer cage support device and hydraulic system for mine vertical shaft hoisting systems. This device reduces the impact of the hoisting container colliding with the crossbeam through a crossbeam buffer section, and reduces the falling distance of the hoisting container during overwinding descent through a hydraulic cage support section. However, this solution has a single function; passive cage support causes the cage to collide with the crossbeam, shortening the device's lifespan and posing operational safety issues. Chinese utility model patent No. 202120888672.6 discloses a buffer cage support device for mines, employing a pneumatic buffer device and a pre-contact structure. When the container overwinds in the vertical shaft hoisting system, pneumatic shock absorption increases the buffering effect, effectively protecting the anti-collision beam. However, this solution suffers from low device lifespan, slow response speed, and operational safety and reliability issues. Therefore, none of the aforementioned prior art devices consider the anti-slip performance and stability of the cage during hoisting / lowering; they only consider the cage support buffering after the container has overwinded. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a cage support and stabilization device for a kilometer-level vertical shaft gravity energy storage system, which solves the problem that the cage of a kilometer-level vertical shaft gravity energy storage system is prone to shaking, slippage, and falling risks. It realizes a cage support and stabilization device for a kilometer-level vertical shaft gravity energy storage system with simple structure, complete functions, easy operation, and fast response. It can flexibly and actively support and stabilize the cage. By dynamically adjusting the tension of the lifting wire rope at the heavy-load end and the light-load end at the beginning and end of the lifting / lowering, it avoids slippage between the lifting wire rope and the friction pad on the friction wheel due to excessive tension difference between the two sides of the lifting wire rope at the beginning and end of the lifting / lowering, thereby improving the friction transmission safety of the kilometer-level vertical shaft gravity energy storage system.

[0005] According to the technical solution of this utility model, this utility model provides a cage support and stabilization device for a kilometer-level vertical shaft gravity energy storage system, including a bottom cage support and stabilization device, which includes a vertical support; a cage support platform that can be raised and lowered in a controlled manner is connected to the vertical support, the upper end of the cage support platform is a cage support surface for contacting the bottom surface of the cage; a stabilizing clamp that can be opened and closed in a controlled manner is connected to the cage support platform, the upper part of the stabilizing clamp is higher than the cage support surface, and the opposite side of the upper part of the stabilizing clamp is a clamping surface for contacting the side of the cage.

[0006] Furthermore, the tank support platform consists of two vertical slides, which are located on both sides of the vertical support. The vertical support is equipped with vertical guide rails, and the vertical slides are slidably connected to the vertical guide rails.

[0007] Furthermore, the can support platform and the vertical support are connected by a vertical can support linear motor; the vertical support is also equipped with a vertical magnetic encoder, which includes a vertical magnetic scale and a vertical reading head. The vertical magnetic scale is fixedly mounted on the vertical support, the vertical reading head is slidably connected to the vertical magnetic scale, and the vertical reading head is fixedly connected to the can support platform.

[0008] Furthermore, the can stabilizing clamp consists of two clamps arranged opposite each other, located on both sides of the vertical support; the can support platform has a horizontal support extending outward on its outward side, and a horizontal guide rail is provided on the horizontal support; on each side of the vertical support, the clamp is slidably connected to the corresponding horizontal guide rail.

[0009] Furthermore, the can stabilizing clamp is connected to the horizontal support via a horizontal can-supporting linear motor; the horizontal support is also equipped with a horizontal magnetic encoder, and the vertical magnetic encoder includes a horizontal magnetic scale and a horizontal reading head. The horizontal magnetic scale is fixedly mounted on the horizontal support, the horizontal reading head is slidably connected to the horizontal magnetic scale, and the horizontal reading head is fixedly connected to the can stabilizing clamp.

[0010] Furthermore, a bottom support beam is arranged inside the shaft, and a bottom tank support and stabilizing device is installed on the bottom support beam.

[0011] Furthermore, it also includes a tension sensor, which is mounted on the wire rope above the cage.

[0012] Furthermore, it also includes a wellhead pressure tank device, which includes a hydraulic lifting rod. The lower part of the hydraulic lifting rod is fixedly connected to the wellhead ground, and the upper part of the hydraulic lifting rod is provided with a transverse telescopic rod extending towards the side closer to the cage.

[0013] Furthermore, the vertical shaft gravity energy storage system adopts a multi-rope friction method, with two cages located at the two ends of the wire rope. When one of the cages is at the wellhead, the other cage is at the bottom of the well. Tension sensors are installed on the wire rope above each cage. The positions of the wellhead cage support and stabilization device and the wellhead cage pressure device correspond to the cages.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] This utility model discloses a cage support and stabilization device for a kilometer-level vertical shaft gravity energy storage system. During the lifting / lowering process of gravity energy storage / release, the device supports and stabilizes the cage at the beginning and end of lifting / lowering, preventing cage swaying during startup and release. It can be used to reduce excessive tension and deformation of the lifting wire rope at the heavy-load end by supporting the cage at the beginning and end of lifting / lowering, and to increase excessive tension and deformation of the lifting wire rope at the light-load end by balancing the cage. This avoids slippage accidents caused by excessive tension difference between the lifting wire ropes on both sides at the beginning and end of lifting / lowering, thus improving the friction transmission safety of the kilometer-level lifting gravity energy storage system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a vertical shaft gravity energy storage system provided by this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the well bottom support and stabilization device provided by this utility model.

[0018] Figure 3 yes Figure 2 The right view of the well bottom support and stabilization device shown.

[0019] Figure 4 yes Figure 2 The top view of the well bottom support and stabilization device shown.

[0020] Figure 5 yes Figure 2 The front view of the well bottom support and stabilizing device holding the cage in the state shown.

[0021] Figure 6 This is a schematic diagram of the wellhead pressure tank device provided by this utility model in the pressure tank state.

[0022] Figure 7 This is a flowchart of the working method of the device provided by this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Bottom tank support and stabilization device; 11. Vertical support; 12. Tank support platform; 121. Vertical guide rail; 122. Vertical tank support linear motor; 123. Vertical magnetic scale; 124. Vertical reading head; 125. Vertical slider; 13. Tank stabilizing clamp; 130. Horizontal support; 131. Horizontal guide rail; 132. Horizontal tank support linear motor; 133. Horizontal magnetic scale; 134. Horizontal reading head; 135. Horizontal slider; 136. Angle code; 2. Tension sensor; 3. Wellhead tank pressure device; 31. Hydraulic lifting rod; 32. Lateral telescopic rod; 4. Vertical shaft; 41. Bottom support beam; 5. Cage; 6. Wire rope; 61. Balance tail rope; 71. Head sheave; 72. Friction wheel; 73. Electric grid; 8. Heavy object. Detailed Implementation

[0025] This utility model provides a cage support and stabilization device for a kilometer-level vertical shaft gravity energy storage system. Specifically, it is a cage support and stabilization device for preventing wire rope slippage during the start-up, operation, and braking of a gravity energy storage system. It solves the problem of cage swaying, slippage, and falling risks in kilometer-level vertical shaft gravity energy storage systems. This device features a simple structure, complete functions, easy operation, and rapid response. It allows for flexible and proactive cage support and stabilization operations. By dynamically adjusting the tension of the lifting wire ropes at the heavy-load and light-load ends at the start and end of lifting / lowering, it avoids slippage between the lifting wire rope and the friction pad on the friction wheel due to excessive tension difference between the two sides of the lifting wire rope at the start and end of lifting / lowering, thus improving the friction transmission safety of the kilometer-level vertical shaft gravity energy storage system.

[0026] Please see Figures 1 to 5 This utility model provides a cage support and stabilization device for a kilometer-level vertical shaft gravity energy storage system, including a bottom cage support and stabilization device 1. The bottom cage support and stabilization device 1 is installed at the bottom of the vertical shaft 4 in the gravity energy storage system, directly below the cage 5. The bottom cage support and stabilization device 1 includes a vertical support 11, on which a controllable lifting and lowering cage platform 12 is connected. The upper end of the cage platform 12 is a cage support surface for contacting the bottom surface of the cage 5, and the cage support surface can apply an upward force to the cage 5, vertically lifting it. A controllable opening and closing stabilizing clamp 13 is connected to the cage platform 12. The upper part of the stabilizing clamp 13 is higher than the cage support surface, and the opposite side of the upper part of the stabilizing clamp 13 is a clamping surface for contacting the side of the cage 5. The can stabilizing clamp 13 is set on the can support platform 12. The height of the clamping surface is relatively fixed with the height of the can support surface. As the can support platform 12 rises and falls, the can stabilizing clamp 13 can also clamp or release the cage 5. The can stabilizing clamp 13 can hold the cage 5 and maintain the stability of the cage 5 during the moment of lifting.

[0027] In a specific embodiment, the vertical support 11 is a vertically arranged square column, and the bottom of the vertical support 11 has a base for fixed connection. The can support platform 12 consists of two vertical slides, which are located on both sides of the vertical support 11. The vertical support 11 is provided with a vertical guide rail 121, and the vertical slides are slidably connected to the vertical guide rail 121. The vertical slides are generally upright plates, and the upper edge of the vertical slide forms the can support surface. Alternatively, a horizontal plate or other structure may be connected to the upper edge of the vertical slide as the can support surface. Generally, the two vertical slides rise and fall synchronously, and the upper can support surfaces are flush, thereby supporting the cage evenly, horizontally, and preferably with a large coverage area. More specifically, two vertical guide rails 121 are provided on each of the left and right sides of the vertical support 11. The tank support 12, i.e. the vertical slide, is fixedly provided with a vertical slider 125 on the side close to the vertical support 11. The vertical slider 125 is slidably connected to the vertical guide rails 121 in a corresponding and matching manner, thereby ensuring stable lifting effect.

[0028] The can support platform 12 is connected to a drive control device. Preferably, for example, the can support platform 12 is connected to the vertical support 11 via a vertical can-supporting linear motor 122. More specifically, the vertical can-supporting linear motor 122 is located between the can support platform 12 and the vertical support 11 and between two vertical guide rails 121. The vertical can-supporting linear motor 122 includes a mover and a stator. The stator is fixedly connected to the vertical support 11, and the mover is fixedly connected to the can support platform 12.

[0029] Preferably, a displacement sensor or detection device is also included to monitor the lifting and lowering distance and / or position, thereby making the control more precise and reliable. For example, a vertical magnetic encoder is provided on the vertical support 11. The vertical magnetic encoder includes a vertical magnetic scale 123 and a vertical reading head 124. The vertical magnetic scale 123 is fixedly mounted on the vertical support 11, and its length direction is vertical. The vertical reading head 124 is slidably connected to the vertical magnetic scale 123 and fixedly connected to the can support platform 12 (more specifically, for example, the vertical reading head 124 is fixedly connected to the vertical slider 125). The vertical magnetic encoder can be optionally located on the side of the vertical support 11 without the can support platform 12, i.e., the front or rear side, to facilitate spatial layout. Both the vertical magnetic encoder and the vertical can support linear motor 122 are connected to the control system, enabling, for example, real-time monitoring of the displacement data of the can support platform 12, accurate operation at a set speed, and stopping at a set position.

[0030] In the illustrated embodiment, the can clamp 13 consists of two clamping bodies arranged opposite each other, located on both sides of the vertical support 11. In other words, each clamping body is a horizontal slide. The clamping bodies are, for example, triangular in structure, with the opposite sides of the two clamping bodies parallel and vertical. This structure is beneficial for force stability and stable clamping effect. The can support 12 has a horizontal support 130 extending outwards from its outward-facing side. Specifically, the horizontal support 130 is horizontal and fixedly connected perpendicularly to the vertical slide, and preferably, a corner bracket 136 is fixedly connected at the connection point to ensure structural strength. A horizontal guide rail 131 is provided on the horizontal support 130. On each side of the vertical support 11, the clamping body is slidably connected to the corresponding horizontal guide rail 131. More specifically, there are two horizontal guide rails 131 arranged side-by-side, with a horizontal slider 135 at the bottom of the clamping body, thus corresponding to and matching the horizontal guide rail 131 in a sliding connection. This allows the two clamping bodies to move stably horizontally, and they are generally designed to move synchronously, thereby achieving the opening and closing action.

[0031] Similarly, the can-stabilizing clamp 13 is connected to a drive control device, and preferably also has a displacement sensor or detection device. Specifically, for example, the can-stabilizing clamp 13 is preferably connected to the horizontal support 130 via a horizontal can-supporting linear motor 132. A horizontal magnetic encoder is preferably also provided on the horizontal support 130. The vertical magnetic encoder includes a horizontal magnetic scale 133 and a horizontal reading head 134. The horizontal magnetic scale 133 is fixedly mounted on the horizontal support 130, with its length direction being horizontal. The horizontal reading head 134 is slidably connected to the horizontal magnetic scale 133 and fixedly connected to the can-stabilizing clamp 13 (more specifically, for example, the horizontal reading head 134 is fixedly connected to a horizontal slider 135). The horizontal magnetic encoder can be optionally mounted on the front or rear side of the can-supporting and stabilizing device 1 at the bottom of the well. Both the horizontal magnetic encoder and the horizontal can-supporting linear motor 132 are connected to the control system, enabling the detection and control of the movement distance of the can-stabilizing clamp 13.

[0032] It is conceivable that other lifting structures, such as scissor lifts, can also be used to lift the tank platform 12, hydraulic cylinders can also be used for driving, and other controllable opening and closing gripper structures can also be used to clamp the tank cage, etc. The present invention preferably adopts the above-mentioned preferred structural form and uses a linear motor as the drive control device, which can make the movement control faster, more accurate and stable.

[0033] Furthermore, it also includes a tension sensor 2, which is mounted on the wire rope 6 above the cage 5. Specifically, the tension sensor 2 is, for example, a pressure-side tension sensor, a common device. In this embodiment, the pressure-side tension sensor is fixed to the wire ropes on both sides by U-bolts. When the wire rope is under tension, the force acts on the sensor through the guide wheel to measure the tension on the wire rope and thus the tension difference between the two sides. Control is then implemented as needed to prevent slippage between the wire rope 6 and the friction pad on the friction wheel 72.

[0034] Please see Figure 6 Preferably, the device also includes a wellhead pressure device 3, which is matched with the wellhead support and stabilization device. The wellhead pressure device 3 includes a vertically arranged hydraulic lifting rod 31 (or hydraulic push rod). The lower part of the hydraulic lifting rod 31 is fixedly connected to the wellhead ground, and the upper part of the hydraulic lifting rod 31 is provided with a transverse telescopic rod 32 extending towards the cage 5. The transverse telescopic rod 32 is, for example, a gear and rack telescopic rod. The transverse telescopic rod 32 can move downward with the hydraulic lifting rod 31 to achieve the downward pressing action on the cage 5; it works in coordination with the wellhead support and stabilization device on the other side through PLC control, supporting the cage on one side while pressing down the cage on the other side, in order to overcome the potential problem of the cage not being able to descend due to insufficient friction.

[0035] Please see again Figure 1 The device of this invention is particularly suitable for this type of gravity energy storage system. The vertical shaft gravity energy storage system adopts a multi-rope friction configuration, with two cages 5 located at the two ends of the wire rope 6. When one cage 5 is at the wellhead, the other cage 5 is at the bottom of the well. A balancing tail rope 61 is connected below the two cages 5. The wellhead, as described herein, corresponds to the upper chamber, and the bottom of the well corresponds to the lower chamber. Both the upper and lower chambers have conveying systems for loading, unloading, and transporting heavy objects 8. Furthermore, the gravity turbine includes two sheaves 71 and a friction wheel 72 connected by the wire rope 6. The friction wheel 72 is connected to the power grid 73 via a power generation and electrical equipment system. This type of multi-rope friction gravity energy storage system is existing technology, such as the applicant's previous Chinese invention patent application with publication number CN117886198A. Therefore, its basic structure and working process will not be described in detail. The improvement of this utility model lies in setting a bottom-mounted tank support and stabilization device 1 at the bottom of the well, and preferably setting a tension sensor 2 on the steel wire rope and a wellhead pressure tank device 3 at the wellhead, thereby realizing the aforementioned tank support and stabilization function. Of course, the bottom-mounted tank support and stabilization device 1, tension sensor 2 and / or wellhead pressure tank device 3 of this utility model can also be used in other types of gravity energy storage systems.

[0036] More specifically, tension sensors 2 are installed on the wire ropes 6 above each cage 5. The wellhead pressure tank device 3 is symmetrically placed on the wellhead ground. The positions of the well bottom support tank stabilizing device 1 and the wellhead pressure tank device 3 correspond to those of the cages 5. A well bottom support beam 41 is arranged inside the shaft 4. Specifically, the well bottom support beam 41 consists of, for example, two horizontally arranged beams, and the well bottom support tank stabilizing device 1 is installed on the well bottom support beam 41. Furthermore, only one wire rope 6 is shown schematically in the figure; in reality, there are multiple wire ropes arranged side-by-side, forming a multi-rope friction configuration. Also, only one gravity energy storage unit is shown in the figure (mainly containing one gravity turbine system and two cages), correspondingly having two sets of well bottom support tank stabilizing devices 1, tension sensors 2, and wellhead pressure tank devices 3. In practice, two or more gravity energy storage units can be arranged based on one shaft 4, and the corresponding equipment will increase exponentially.

[0037] Based on the preferred scheme of the vertical shaft gravity energy storage system and the supporting cage stabilizing device of the present invention, the following is a working method of the cage stabilizing device for a kilometer-level vertical shaft gravity energy storage system. Taking a gravity energy storage unit and a heavy-load lifting condition (energy storage) as an example, the energy storage process includes the following steps.

[0038] Step S1: Initially, the can support platform 12 is in the lowered state and the can stabilizing clamp 13 is in the open state. When one of the two empty can cages 5 is lowered to the bottom of the well and about to stop, the can stabilizing clamp 13 of the bottom can support and stabilizer 1 moves towards the empty can cage. When the stabilizing clamp 13 contacts the empty can cage, it stops moving, clamping the can cage 5 to prevent shaking. Specifically, for example, the left and right horizontal slides move towards the empty can cage from both sides under the drive of a linear motor. The displacement of the linear motor is controlled by data feedback from the magnetic encoder, thus realizing the required action process. Furthermore, in this step, the can support platform 12 is always in the lowered state, i.e., at a certain set low position.

[0039] Step S2: After the empty cage comes to a stop, keep the cage clamp 13 and the cage 5 in a clamped state to prevent the cage 5 from shaking when loading heavy objects.

[0040] In step S3, the empty cage 5 is loaded at the bottom of the well and becomes a loaded cage. When lifting upwards, the cage support platform 12 and the cage stabilizing clamp 13 move upwards together (specifically, for example, the vertical slides on the left and right sides of the vertical support move upwards under the drive of a linear motor), assisting the hoist (i.e., the gravity wheel machine) in lifting the loaded cage. At the same time, the wellhead pressing device 3 presses the empty cage on the other side of the wellhead downwards through the horizontal telescopic rod 32 (specifically, the horizontal telescopic rod 32 extends above the cage, and then the hydraulic lifting rod 31 descends, so that the horizontal telescopic rod 32 applies a downward force to the cage 5). When the tension sensor 2 detects that the tension difference of the steel wire ropes 6 on both sides has decreased to a preset safety range, the lifting and pressing actions can be stopped. "Stop lifting" means that the motor stops supplying power. After the power supply stops, the lifting platform and the stabilizing clamp will no longer actively provide power, but the cage is still being lifted. Therefore, the lifting platform and the stabilizing clamp are allowed to continue to move up a distance with the cage. This design ensures the stability of the cage lifting and avoids interference from the lifting platform and the stabilizing clamp on the cage lifting process.

[0041] In step S4, as the loaded cage is smoothly lifted upwards, the cage stabilizing clamp 13 releases the cage 5 (specifically, for example, the left and right horizontal slides are moved to the sides of the loaded cage under the drive of a linear motor to release it), and the cage support platform 12 and the cage stabilizing clamp 13 move downwards together back to their initial state (specifically, the vertical slides on the left and right sides of the vertical support move downwards to their initial state), and the transverse telescopic rod 32 of the wellhead cage pressure device 3 retracts. In other words, this step means that the main motor of the hoist starts to rotate, the cage can be smoothly lifted, and the cage support and stabilizing functions are canceled.

[0042] After the loaded cage on this side is lifted to the wellhead for unloading, the empty cage returns and repeats steps S1 to S4 using the cage-supporting and stabilizing device of the vertical shaft gravity energy storage system. Thus, the device of this invention assists the cage during each energy conversion process of gravity energy storage. It is understood that the descent of the loaded cage (i.e., during energy release) can also employ similar actions, either fully or partially, to achieve the same cage-supporting and stabilizing effects.

[0043] More specifically, please see Figure 7In a preferred embodiment, the control system includes a connected PLC, a cloud / local server, etc., and all drive and control components such as motors and encoders, as well as tension sensors, are connected to the control system. The PLC coordinates the work of the bottom-mounted can support and stabilize the can, and the top-mounted can pressurize the can, working in tandem. Simultaneously, it acquires signals such as wire rope tension difference and (magnetic encoder) displacement in real time, transmitting the data to the cloud / local server for storage. Data analysis and exchange are achieved through the CAN communication protocol. Finally, the control system controller executes the commands. If the tension difference does not meet safety requirements, the can support, stabilize, and pressurize actions continue; if the tension difference reaches a safe range, the can support, stabilize, and pressurize actions stop, each device returns to its initial state, and then waits to enter the next cycle.

[0044] In summary, by adopting the above technical solutions, the structure of this utility model supports and stabilizes the cage at the beginning and end of the lifting / lowering process during gravity energy storage / release, preventing cage swaying during startup and release. It can be used to reduce excessive tension and deformation of the lifting wire rope at the heavy-load end by supporting the cage at the beginning and end of lifting / lowering, and to increase excessive tension and deformation of the lifting wire rope at the light-load end by pressing the cage. This avoids slippage accidents between the lifting wire rope and the friction pad on the friction wheel caused by excessive tension difference between the two sides of the lifting wire rope at the beginning and end of lifting / lowering, thus improving the friction transmission safety of the kilometer-level gravity energy storage system.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; obviously, the described embodiments are some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model; for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other; modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cage support and stabilization device for a kilometer-level vertical shaft gravity energy storage system, characterized in that, The device includes a bottom support and stabilizing device (1), which includes a vertical support (11); a controllable lifting platform (12) is connected to the vertical support (11), the upper end of the platform (12) is a support surface for contacting the bottom surface of the cage (5); a controllable opening and closing stabilizing clamp (13) is connected to the platform (12), the upper part of the clamp (13) is higher than the support surface, and the opposite side of the upper part of the clamp (13) is a clamping surface for contacting the side of the cage (5).

2. The cage support and stabilizing device for a kilometer-level vertical shaft gravity energy storage system according to claim 1, characterized in that, The tank support platform (12) consists of two vertical slides, which are located on both sides of the vertical support (11). The vertical support (11) is equipped with a vertical guide rail (121), and the vertical slides are slidably connected to the vertical guide rail (121).

3. The cage support and stabilizing device for a kilometer-level vertical shaft gravity energy storage system according to claim 2, characterized in that, The can support platform (12) and the vertical support (11) are connected by a vertical can support linear motor (122); A vertical magnetic encoder is also provided on the vertical support (11). The vertical magnetic encoder includes a vertical magnetic scale (123) and a vertical reading head (124). The vertical magnetic scale (123) is fixedly installed on the vertical support (11). The vertical reading head (124) is slidably connected to the vertical magnetic scale (123). The vertical reading head (124) is fixedly connected to the tank support (12).

4. The cage support and stabilizing device for a kilometer-level vertical shaft gravity energy storage system according to claim 2, characterized in that, The can clamp (13) consists of two clamps arranged opposite each other, located on both sides of the vertical support (11); the can support platform (12) has a horizontal support (130) extending outward on its outward side, and a horizontal guide rail (131) is provided on the horizontal support (130); on each side of the vertical support (11), the clamp is slidably connected to the corresponding horizontal guide rail (131).

5. The cage support and stabilizing device for a kilometer-level vertical shaft gravity energy storage system according to claim 4, characterized in that, The can clamp (13) and the horizontal support (130) are connected by a horizontal can-supporting linear motor (132); A horizontal magnetic encoder is also provided on the horizontal support (130). The vertical magnetic encoder includes a horizontal magnetic scale (133) and a horizontal reading head (134). The horizontal magnetic scale (133) is fixedly installed on the horizontal support (130). The horizontal reading head (134) is slidably connected to the horizontal magnetic scale (133). The horizontal reading head (134) is fixedly connected to the tank clamp (13).

6. The cage support and stabilizing device for a kilometer-level vertical shaft gravity energy storage system according to claim 1, characterized in that, The shaft (4) has a bottom support beam (41) inside the shaft, and the bottom support and stabilizing device (1) is set on the bottom support beam (41).

7. The cage support and stabilizing device for a kilometer-level vertical shaft gravity energy storage system according to any one of claims 1-6, characterized in that, It also includes a tension sensor (2), which is mounted on the wire rope (6) above the cage (5).

8. The cage support and stabilizing device for a kilometer-level vertical shaft gravity energy storage system according to any one of claims 1-6, characterized in that, It also includes a wellhead pressure tank device (3), which includes a hydraulic lifting rod (31). The lower part of the hydraulic lifting rod (31) is fixedly connected to the wellhead ground, and the upper part of the hydraulic lifting rod (31) is provided with a transverse telescopic rod (32) extending toward the side closer to the cage (5).

9. The cage support and stabilizing device for a kilometer-level vertical shaft gravity energy storage system according to claim 8, characterized in that, The vertical shaft gravity energy storage system adopts a multi-rope friction form. Two cages (5) are located at the two ends of the wire rope (6). When one of the cages (5) is located at the wellhead, the other cage (5) is located at the bottom of the well. Tension sensors (2) are installed on the wire rope (6) above each cage (5). The positions of the wellhead support and stabilization device (1) and the wellhead pressure device (3) correspond to the cages (5).

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