Energy storage system of ship lift

Abstract

The invention discloses a ship lift energy storage system which comprises a ship chamber, vertical shafts are arranged on the two sides in the ship chamber, balance weights are arranged in the vertical shafts, a mechanical system comprises fixing blocks, the fixing blocks are arranged on the outer sides of the tops of the vertical shafts, guide cylinders are arranged on the outer sides of the tops of the vertical shafts, and movable pulleys are arranged on the tops of the balance weights. The fixed block is connected with one end of a connecting rope, the other end of the connecting rope penetrates through the movable pulley and the guide cylinder to be fixed to one side of the ship chamber, the energy storage system communicates with the sealed space at the bottom of the vertical shaft, and energy storage is achieved by filling a medium into the sealed space of the vertical shaft and energy release is achieved by releasing the medium through the sealed space of the vertical shaft. The ship chamber is driven to ascend and descend in the energy storage and release process, and the energy storage system comprises a gas energy storage system and / or a liquid energy storage system. Gravitational potential energy conversion in the ship navigation dam passing process is fully utilized, energy utilization is achieved, and energy consumption of the ship lift system is reduced; and meanwhile, the requirement of the ship lift system on the water quantity is reduced.

Description

Technical Field

[0001] The invention relates to a ship lift energy storage system and belongs to the technical field of water conservancy and hydropower engineering. Background Art

[0002] Water conservancy hubs usually use vertical ship lifts as permanent navigation facilities, which are used to provide a fast passage for passenger and cargo ships and special ships to pass through the dam. Compared with ship locks, ship lifts have significant advantages such as adapting to high head, small footprint, fast passing speed and saving water resources. They are especially suitable for high dam navigation and have obvious advantages in solving the navigation of hubs above 50m.

[0003] Traditional ship lifts use the principle of electric-driven mechanical lifting, while hydraulic ship lifts mainly use water energy as lifting power and safety measures. They have incomparable technical advantages over traditional motor-driven ship lifts in solving the problem of large-scale, underwater ship lifts with large changes in lifting weight. For water conservancy hubs with dam heights greater than 100m, they have broad application prospects in inland navigation.

[0004] The filling and discharging valves are the core control components of the hydraulic ship lift, which directly control the normal lifting and docking of the ship lift. However, the valves operate frequently and for a long time, the working water head is high, the hydrodynamic problems in the opening and closing process are complex, and the valve cavitation and vibration problems are difficult to avoid, which directly affect the operating safety and efficiency of the ship lift.

[0005] Taking the Jinghong hydraulic ship lift in my country as an example, the ship compartment weighs 3,000 tons and can carry a maximum of 500-ton ships. It is hydraulically lifted vertically, with a maximum lifting height of 66.86 meters and an annual cargo volume of 1.245 million tons. This means that about 2x9.8x1245000=2.4x107kN of gravitational potential energy is converted every year. The Three Gorges ship lift can carry 3,000-ton ships, with a maximum climbing tonnage of 15,500 tons and a maximum climbing height of 113 meters, and can achieve 6 million tons of dam crossing every year. If these energy conversions are utilized, a considerable energy storage effect can be formed. In addition, a large amount of water resources are consumed in hydraulic shafts. For high dams in the northwest region with scarce water resources, or when water resources are scarce during the dry season, how to use less water resources to achieve greater navigation capacity is also a difficult problem faced in the project. Summary of the invention

[0006] The purpose of the present invention is to provide a ship lift energy storage system, which fully utilizes the gravitational potential energy conversion during the navigation of ships through the dam, realizes energy utilization, reduces the energy consumption of the ship lift system, and reduces the water requirement of the ship lift system.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: a ship lift energy storage system, comprising: a cabin room, wherein vertical shafts are arranged on both sides of the cabin room; a cabin, wherein the cabin is arranged in the cabin room and placed between the vertical shafts on both sides;

[0008] A counterweight, the counterweight being placed in the shaft;

[0009] A mechanical system, wherein the mechanical system comprises a fixed block, the fixed block is arranged on the outside of the top of the shaft, a guide cylinder is arranged on the outside of the top of the shaft, a movable pulley is arranged on the top of the counterweight, the fixed block is connected to one end of a connecting rope, and the other end of the connecting rope passes through the movable pulley and the guide cylinder and is fixed to one side of the cabin;

[0010] An energy storage system is connected to the space at the bottom of the shaft. Energy storage is achieved by filling the shaft space with a medium and energy release is achieved by releasing the medium from the shaft space. The energy storage system drives the lifting and lowering of the cabin during the energy storage and release process. The energy storage system includes a gas energy storage system and / or a liquid energy storage system.

[0011] In the aforementioned ship lift energy storage system, a plurality of vertical shafts are provided, and the plurality of vertical shafts are evenly distributed in a straight line along both sides of the cabin room, the guide cylinder is in the shape of a long cylinder, a plurality of connecting ropes on the same side are all wound around the guide cylinder, and a synchronization system is provided between the two guide cylinders.

[0012] The aforementioned ship lift energy storage system, the two sides of the cabin room are further provided with secondary shafts, the secondary shafts are placed outside the shafts and correspond one to one, the secondary shafts are provided with secondary counterweights, the fixed blocks are fixed to the tops of the secondary counterweights, the energy storage system is connected with the space at the bottom of the secondary shafts, energy storage is achieved by filling the space at the bottom of the secondary shafts with medium and energy release is achieved by releasing the medium from the secondary shaft space, and the fixed blocks are driven to rise and fall during the energy storage and release processes.

[0013] The above-mentioned ship lift energy storage system, the medium of the energy storage system is gas, a flexible sealing material is arranged between the side wall of the counterweight and the side wall of the shaft, so that a sealed space is formed at the bottom of the shaft, a flexible sealing material is arranged between the side wall of the secondary counterweight and the side wall of the secondary shaft, so that a sealed space is formed at the bottom of the secondary shaft, the gas energy storage system in the energy storage system includes an electric motor and an expander, the electric motor is driven and connected to a compressor, the output end of the compressor is connected to the sealed space at the bottom of the shaft and / or the sealed space at the bottom of the secondary shaft through a pipeline, the input end of the expander is connected to the sealed space at the bottom of the shaft and / or the sealed space at the bottom of the secondary shaft through a pipeline, and the output end of the expander is driven and connected to a generator.

[0014] In the aforementioned ship lift energy storage system, both the compressor output end pipeline and the expander input end pipeline are provided with control valves.

[0015] The above-mentioned ship lift energy storage system, the medium of the energy storage system is liquid, the counterweight can float on the liquid medium, the liquid energy storage system in the energy storage system includes a water tank, the water tank is connected to the bottom space of the shaft and / or the bottom space of the secondary shaft through a water pipe, and a pumped storage generator set is arranged on the water pipe of the water tank.

[0016] In the aforementioned ship lift energy storage system, a bridge crane is provided on the top of the inner side of the cabin, and the bridge crane is arranged at the bottom of the power end on both sides and is connected to a lifting beam, the fixed blocks on the same side are fixed on the same lifting beam, and the two lifting beams move up and down synchronously.

[0017] In the aforementioned ship lift energy storage system, guide wheels are arranged on the side walls of the shaft, and emergency locking devices are arranged on the side walls of the shaft.

[0018] In the aforementioned ship lift energy storage system, the secondary guide wheels are arranged on the side walls of the secondary shaft, and the secondary emergency locking device is arranged on the side walls of the secondary shaft.

[0019] In the aforementioned ship lift energy storage system, the inner cavity of the cabin room is provided with water of controllable water level.

[0020] Compared with the prior art, the present invention makes full use of the conversion of gravitational potential energy during the navigation of ships through the dam, realizes energy utilization, and reduces the energy consumption of the ship lift system; at the same time, it reduces the water volume requirement of the ship lift system, especially in the dry season, it can solve the problem of insufficient navigation capacity of the hydraulic ship lift and improve the navigation efficiency of the ship lift system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the inflatable system of the present invention;

[0022] Figure 2 It is a schematic diagram of the water-filling system of the present invention;

[0023] Figure 3 is a schematic diagram of a system in Embodiment 3 of the present invention;

[0024] Figure 4 It is a schematic diagram of the system of Example 4 of the present invention.

[0025] Figure numerals: 1-cabin room, 2-shaft, 3-cabin, 4-counterweight, 5-flexible sealing material, 6-mechanical system, 7-fixed block, 8-guide cylinder, 9-movable pulley, 10-connecting rope, 11-energy storage system, 12-secondary shaft, 13-secondary counterweight, 14-motor, 15-compressor, 16-expander, 17-generator, 18-water tank, 19-pumped storage generator set, 20-bridge crane.

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0027] Embodiment 1 of the present invention: A ship lift energy storage system, comprising:

[0028] A cabin room 1, wherein vertical shafts 2 are arranged on both sides of the cabin room 1, and multiple vertical shafts 2 are arranged, and the multiple vertical shafts 2 are evenly distributed in a straight line along both sides of the cabin room 1, and the vertical shafts 2 can be divided into two types: water-filled and air-filled, and the two types are arranged alternately;

[0029] A cabin 3, the cabin 3 is arranged in the cabin room 1 and placed between the vertical shafts 2 on both sides;

[0030] A counterweight 4, the counterweight 4 being placed in the shaft 2;

[0031] The mechanical system 6 comprises a fixed block 7, which is arranged on the outside of the top of the shaft 2, a guide cylinder 8 is arranged on the outside of the top of the shaft 2, a movable pulley 9 is arranged on the top of the counterweight 4, the fixed block 7 is connected to one end of a connecting rope 10, the other end of the connecting rope 10 passes through the movable pulley 9 and the guide cylinder 8 and is fixed to one side of the cabin 3, the guide cylinder 8 is in the shape of a long cylinder, and multiple connecting ropes 10 on the same side are all wound around the guide cylinder 8, and a synchronization system is arranged between the two guide cylinders 8 to ensure the synchronous rise and fall of the counterweights 4 in different shafts 2;

[0032] The energy storage system 11 is connected to the sealed space at the bottom of the shaft 2. Energy storage is achieved by filling the sealed space of the shaft 2 with a medium and energy release is achieved by releasing the medium from the sealed space of the shaft 2. The energy storage system 11 drives the lifting and lowering operation of the cabin 3 during the energy storage and release process. The energy storage system includes a gas energy storage system and / or a liquid energy storage system. The gas energy storage system and / or the liquid energy storage system can be operated separately or in combination.

[0033] Embodiment 2 of the present invention: A ship lift energy storage system, comprising:

[0034] A cabin room 1, wherein vertical shafts 2 are arranged on both sides of the cabin room 1, and a plurality of vertical shafts 2 are arranged, and the plurality of vertical shafts 2 are evenly distributed in a straight line along both sides of the cabin room 1, and the vertical shafts 2 can be divided into two types: water-filled and air-filled, and the two types are arranged alternately;

[0035] A cabin 3, wherein the cabin 3 is arranged in the cabin room 1 and between the vertical shafts 2 on both sides;

[0036] A balancing weight 4 is placed in the shaft 2. When gas energy is stored, a flexible sealing material 5 is provided between the side wall of the balancing weight 4 in the shaft 2 and the side wall of the shaft 2, so that a sealed space is formed at the bottom of the shaft 2;

[0037] The mechanical system 6 comprises a fixed block 7, which is arranged on the outside of the top of the shaft 2, a guide cylinder 8 is arranged on the outside of the top of the shaft 2, a movable pulley 9 is arranged on the top of the counterweight 4, the fixed block 7 is connected to one end of a connecting rope 10, the other end of the connecting rope 10 passes through the movable pulley 9 and the guide cylinder 8 and is fixed to one side of the cabin 3, the guide cylinder 8 is in the shape of a long cylinder, and multiple connecting ropes 10 on the same side are all wound around the guide cylinder 8, and a synchronization system is arranged between the two guide cylinders 8 to ensure the synchronous rise and fall of the counterweights 4 in different shafts 2;

[0038] The energy storage system 11 is connected to the sealed space at the bottom of the shaft 2. Energy storage is achieved by filling the sealed space of the shaft 2 with a medium and energy release is achieved by releasing the medium from the sealed space of the shaft 2. The energy storage system 11 drives the lifting and lowering operation of the cabin 3 during the energy storage and release process. The energy storage system includes a gas energy storage system and / or a liquid energy storage system. The gas energy storage system and / or the liquid energy storage system can be operated separately or in combination.

[0039] Among them, the gas energy storage system in the energy storage system 11 includes a motor 14 and an expander 16, the motor 14 is driven and connected to a compressor 15, the output end of the compressor 15 is connected to the sealed space at the bottom of the shaft 2 through a pipeline, the input end of the expander 16 is connected to the sealed space at the bottom of the shaft 2 through a pipeline, the output end of the expander 16 is driven and connected to a generator 17, the medium of the energy storage system 11 is gas, and the output end pipeline of the compressor 15 and the input end pipeline of the expander 16 are both provided with control valves.

[0040] The liquid energy storage system in the energy storage system 11 includes a water tank 18, which is connected to the sealed space at the bottom of the shaft 2 through a water pipe. A pumped storage generator set 19 is arranged on the water pipe of the water tank 18. The medium of the energy storage system 11 is liquid.

[0041] Furthermore, the vertical shafts 2 for gas energy storage and the vertical shafts 2 for liquid energy storage are arranged alternately.

[0042] Embodiment 3 of the present invention: A ship lift energy storage system, comprising:

[0043] A cabin room 1, wherein vertical shafts 2 are arranged on both sides of the cabin room 1, and multiple vertical shafts 2 are arranged, and the multiple vertical shafts 2 are evenly distributed in a straight line along both sides of the cabin room 1, and the vertical shafts 2 can be divided into two types: water-filled and air-filled, and the two types are arranged alternately;

[0044] A cabin 3, the cabin 3 is arranged in the cabin room 1 and placed between the vertical shafts 2 on both sides;

[0045] A balancing weight 4 is placed in the shaft 2. When gas energy is stored, a flexible sealing material 5 is provided between the side wall of the balancing weight 4 in the shaft 2 and the side wall of the shaft 2, so that a sealed space is formed at the bottom of the shaft 2;

[0046] The mechanical system 6 comprises a fixed block 7, which is arranged on the outside of the top of the shaft 2, a guide cylinder 8 is arranged on the outside of the top of the shaft 2, a movable pulley 9 is arranged on the top of the counterweight 4, the fixed block 7 is connected to one end of a connecting rope 10, the other end of the connecting rope 10 passes through the movable pulley 9 and the guide cylinder 8 and is fixed to one side of the cabin 3, the guide cylinder 8 is in the shape of a long cylinder, and multiple connecting ropes 10 on the same side are all wound around the guide cylinder 8, and a synchronization system is arranged between the two guide cylinders 8 to ensure the synchronous rise and fall of the counterweights 4 in different shafts 2;

[0047] The energy storage system 11 is connected to the sealed space at the bottom of the shaft 2. Energy storage is achieved by filling the sealed space of the shaft 2 with a medium and energy release is achieved by releasing the medium from the sealed space of the shaft 2. The energy storage system 11 drives the lifting and lowering operation of the cabin 3 during the energy storage and release process. The energy storage system includes a gas energy storage system and / or a liquid energy storage system. The gas energy storage system and / or the liquid energy storage system can be operated separately or in combination.

[0048] A secondary shaft 12 is also provided on both sides of the cabin room 1. The secondary shaft 12 can be divided into two types: water-filled and air-filled. The two types are arranged alternately. The secondary shaft 12 is placed outside the shaft 2 and corresponds one to one. A secondary balance weight 13 is provided in the secondary shaft 12. A flexible sealing material 5 is provided between the side wall of the secondary balance weight 13 and the side wall of the secondary shaft 12, so that a sealed space is formed at the bottom of the secondary shaft 12. The fixed block 7 is fixed to the top of the secondary balance weight 13. The energy storage system 11 is connected to the sealed space at the bottom of the secondary shaft 12. Energy storage is achieved by filling the sealed space of the secondary shaft 12 with a medium and energy release is achieved by releasing the medium from the sealed space of the secondary shaft 12. The fixed block 7 is driven to rise and fall during the energy storage and release processes.

[0049] Among them, the gas energy storage system in the energy storage system 11 includes an electric motor 14 and an expander 16, the electric motor 14 is driven and connected to a compressor 15, the output end of the compressor 15 is connected to the sealed space at the bottom of the shaft 2 and / or the sealed space at the bottom of the secondary shaft 12 through a pipeline, the input end of the expander 16 is connected to the sealed space at the bottom of the shaft 2 and / or the sealed space at the bottom of the secondary shaft 12 through a pipeline, the output end of the expander 16 is driven and connected to a generator 17, the medium of the energy storage system 11 is gas, and the pipeline at the output end of the compressor 15 and the pipeline at the input end of the expander 16 are both provided with control valves.

[0050] The liquid energy storage system in the energy storage system 11 includes a water tank 18, which is connected to the sealed space at the bottom of the shaft 2 and / or the sealed space at the bottom of the secondary shaft 12 through a water pipe. A pumped storage generator set 19 is arranged on the water pipe of the water tank 18. The medium of the energy storage system 11 is liquid.

[0051] Embodiment 4 of the present invention: A ship lift energy storage system, comprising:

[0052] A cabin room 1, wherein vertical shafts 2 are arranged on both sides of the cabin room 1, and a plurality of vertical shafts 2 are arranged, and the plurality of vertical shafts 2 are evenly distributed in a straight line along both sides of the cabin room 1;

[0053] A cabin 3, the cabin 3 is arranged in the cabin room 1 and placed between the vertical shafts 2 on both sides;

[0054] A balancing weight 4 is placed in the shaft 2. When gas energy is stored, a flexible sealing material 5 is provided between the side wall of the balancing weight 4 in the shaft 2 and the side wall of the shaft 2, so that a sealed space is formed at the bottom of the shaft 2;

[0055] The mechanical system 6 comprises a fixed block 7, which is arranged on the outside of the top of the shaft 2, a guide cylinder 8 is arranged on the outside of the top of the shaft 2, a movable pulley 9 is arranged on the top of the counterweight 4, one end of a connecting rope 10 is connected to the fixed block 7, the other end of the connecting rope 10 passes through the movable pulley 9 and the guide cylinder 8 and is fixed to one side of the cabin 3, the guide cylinder 8 is in the shape of a long cylinder, and multiple connecting ropes 10 on the same side are all wound around the guide cylinder 8, and a synchronization system is arranged between the two guide cylinders 8;

[0056] The energy storage system 11 is connected to the sealed space at the bottom of the shaft 2. Energy storage is achieved by filling the sealed space of the shaft 2 with a medium and energy release is achieved by releasing the medium from the sealed space of the shaft 2. The energy storage system 11 drives the lifting and lowering operation of the cabin 3 during the energy storage and release process. The energy storage system includes a gas energy storage system and / or a liquid energy storage system. The gas energy storage system and / or the liquid energy storage system can be operated separately or in combination.

[0057] Among them, the gas energy storage system in the energy storage system 11 includes a motor 14 and an expander 16, the motor 14 is driven and connected to a compressor 15, the output end of the compressor 15 is connected to the sealed space at the bottom of the shaft 2 through a pipeline, the input end of the expander 16 is connected to the sealed space at the bottom of the shaft 2 through a pipeline, the output end of the expander 16 is driven and connected to a generator 17, the medium of the energy storage system 11 is gas, and the output end pipeline of the compressor 15 and the input end pipeline of the expander 16 are both provided with control valves.

[0058] The liquid energy storage system in the energy storage system 11 includes a water tank 18, which is connected to the sealed space at the bottom of the shaft 2 through a water pipe. A pumped storage generator set 19 is arranged on the water pipe of the water tank 18. The medium of the energy storage system 11 is liquid.

[0059] Furthermore, the vertical shafts 2 for gas energy storage and the vertical shafts 2 for liquid energy storage are arranged alternately.

[0060] A bridge crane 20 is provided on the top of the inner side of the cabin room 1. The bridge crane 20 is arranged at the bottom of the power end on both sides and is connected with a lifting beam 21. The fixing blocks 7 on the same side are fixed on the same lifting beam 21, and the two lifting beams 21 move up and down synchronously.

[0061] Specifically, guide wheels are arranged on the side walls of the shaft 2, and emergency locking devices are arranged on the side walls of the shaft 2; secondary guide wheels are arranged on the side walls of the secondary shaft 12, and secondary emergency locking devices are arranged on the side walls of the secondary shaft 12 to avoid the shaking of the counterweight 4 and ensure the smooth operation of the system during start-up and shutdown and operation. The emergency locking device is activated in an emergency to ensure the safety of the system in abnormal working conditions, such as severe water leakage.

[0062] Specifically, the inner cavity of the cabin room 1 is provided with water of controllable water level, and the draft of the passing vessel is determined by the water level.

[0063] The working principle of an embodiment of the present invention:

[0064] Inflatable energy storage system: When the ship descends from upstream to downstream, the compressor 15 is driven by the motor 14 to fill the shaft 2 with gas. The air pressure and the weight of the hull cause the counterweight 4 in the shaft 2 to rise, causing the ship to descend downstream and storing energy at the same time; when the ship rises from downstream to upstream, the counterweight 4 descends, driving the ship to rise upstream, and at the same time the stored gas in the shaft 2 is compressed, converting the gravitational potential energy into compressed air potential energy. The high-pressure air is heated and enters the expander 16 to become air at normal pressure. In this process, the generator 17 is driven to generate electricity, and the air compression potential energy is converted into electrical energy output.

[0065] Water-filled energy storage system: When the ship descends from upstream to downstream, the water in the high water storage tank 18 flows into the vertical shaft 2, and the water pressure, buoyancy and weight of the hull cause the counterweight 4 in the vertical shaft 2 to rise, causing the ship to descend downstream, and at the same time driving the pumped-storage generator set 19 to generate electricity; when the ship rises from downstream to upstream, the counterweight 4 descends, driving the ship to rise upstream, and at the same time, the water source in the vertical shaft 2 is transported back to the high water storage tank 18 through the gravitational potential energy of the counterweight 4 and the pumped-storage generator set 19 to store energy.

[0066] The above-mentioned gas-filled and water-filled shafts 2 can be operated separately or in combination to fully utilize energy conversion; in the stage of water scarcity, the gas-filled shaft 2 can be opened first; in order to lower the water level of a river or reservoir, the water-filled shaft 2 can be opened first.

[0067] During the dry season, when the water level difference between upstream and downstream is too large, graded energy storage can be used. The vertical shaft 2 and the secondary vertical shaft 12 can be used together to extend the travel of the cabin 3. The travel of the cabin 3 can also be extended by the coordinated operation of the bridge crane 20 and the vertical shaft 2.

Claims

1. A ship lift energy storage system, characterized in that: include: A cabin room (1), wherein vertical shafts (2) are arranged on both sides of the cabin room (1); A cabin (3), the cabin (3) being arranged in the cabin room (1) and placed between the vertical shafts (2) on both sides; a balancing weight (4), wherein the balancing weight (4) is placed in the shaft (2); A mechanical system (6), the mechanical system (6) comprising a fixed block (7), the fixed block (7) being arranged on the outside of the top of the shaft (2), a guide cylinder (8) being arranged on the outside of the top of the shaft (2), a movable pulley (9) being arranged on the top of the counterweight (4), the fixed block (7) being connected to one end of a connecting rope (10), the other end of the connecting rope (10) passing through the movable pulley (9) and the guide cylinder (8) and being fixed to one side of the cabin (3); An energy storage system (11) is connected to the space at the bottom of the shaft (2), and energy storage is achieved by filling a medium into the space at the bottom of the shaft (2) and energy release is achieved by releasing the medium from the space at the bottom of the shaft (2), and the lifting and lowering operation of the cabin (3) is driven during the energy storage and release process. The energy storage system (11) includes a gas energy storage system and / or a liquid energy storage system.

2. A ship lift energy storage system according to claim 1, characterized in that: A plurality of the vertical shafts (2) are arranged, and the plurality of the vertical shafts (2) are evenly distributed in a straight line along both sides of the cabin (1); the guide cylinder (8) is in the shape of a long cylinder, and a plurality of connecting ropes (10) on the same side are all wound around the guide cylinder (8); and a synchronization system is arranged between the two guide cylinders (8).

3. A ship lift energy storage system according to claim 2, characterized in that: Secondary shafts (12) are also provided on both sides of the cabin room (1), the secondary shafts (12) are placed outside the shafts (2) and correspond one to one, a secondary counterweight (13) is provided in the secondary shaft (12), the fixed block (7) is fixed to the top of the secondary counterweight (13), the energy storage system (11) is connected to the space at the bottom of the secondary shaft (12), energy storage is achieved by filling the space at the bottom of the secondary shaft (12) with a medium, and energy release is achieved by releasing the medium from the space at the bottom of the secondary shaft (12), and the fixed block (7) is driven to rise and fall during the energy storage and release processes.

4. A ship lift energy storage system according to claim 3, characterized in that: The medium of the energy storage system (11) is gas. A flexible sealing material (5) is provided between the side wall of the counterweight (4) and the side wall of the shaft (2), so that a sealed space is formed at the bottom of the shaft (2). A flexible sealing material (5) is provided between the side wall of the secondary counterweight (13) and the side wall of the secondary shaft (12), so that a sealed space is formed at the bottom of the secondary shaft (12). The gas energy storage system in the energy storage system (11) comprises an electric motor (14) and an expander (16). The electric motor (14) is driven and connected to a compressor (15). The output end of the compressor (15) is connected to the sealed space at the bottom of the shaft (2) and / or the sealed space at the bottom of the secondary shaft (12) through a pipeline. The input end of the expander (16) is connected to the sealed space at the bottom of the shaft (2) and / or the sealed space at the bottom of the secondary shaft (12) through a pipeline. The output end of the expander (16) is driven and connected to a generator (17).

5. A ship lift energy storage system according to claim 4, characterized in that: The pipeline at the output end of the compressor (15) and the pipeline at the input end of the expander (16) are both provided with control valves.

6. A ship lift energy storage system according to claim 3, characterized in that: The medium of the energy storage system (11) is liquid. The liquid energy storage system in the energy storage system (11) comprises a water tank (18). The water tank (18) is connected to the bottom space of the shaft (2) and / or the bottom space of the secondary shaft (12) via a water pipe. A pumped storage generator set (19) is arranged on the water pipe of the water tank (18). The counterweight (4) can float in the liquid medium.

7. The ship lift energy storage system according to claim 2, characterized in that: A bridge crane (20) is provided on the top inner side of the cabin room (1). The bridge crane (20) is arranged at the bottom of the power end on both sides and is connected to a lifting beam (21). The fixing blocks (7) on the same side are fixed on the same lifting beam (21), and the two lifting beams (21) move up and down synchronously.

8. The ship lift energy storage system according to claim 2, characterized in that: The side wall of the shaft (2) is provided with a guide wheel, and the side wall of the shaft (2) is provided with an emergency locking device.

9. The ship lift energy storage system according to claim 3, characterized in that: The side wall of the secondary shaft (12) is provided with a secondary guide wheel, and the side wall of the secondary shaft (12) is provided with a secondary emergency locking device.

10. The ship lift energy storage system according to claim 1, characterized in that: The inner cavity of the cabin room (1) is provided with water of controllable water level.

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