Columnar gravity energy storage system

Abstract

The utility model relates to the technical field of gravity energy storage, in particular to a columnar gravity energy storage system which comprises a base, a columnar energy storage cylinder and an inner cavity, the lower portion of the columnar energy storage cylinder is fixedly installed at the top end of the base, and a columnar gravity energy storage efficient conversion structure is arranged in the inner cavity. And a balancing weight mechanical lifting structure is arranged at the top end of the columnar energy storage cylinder. According to the columnar gravity energy storage system, a balancing weight can be pulled upwards through a winch, electric energy is stored as gravitational potential energy, then when the stored gravitational potential energy needs to be extracted, the gravitational potential energy of the balancing weight can push a piston head to extrude out water flow stored in a lifting groove along communicating pipes on the two sides, and then the water flow is extracted; flowing water flow can drive the generator to generate electric energy after passing through the generator, the water flow is compressed through the piston-type balancing weight to drive the generator to generate electricity, energy loss caused in the falling process of the balancing weight can be reduced to the maximum extent, and the energy storage efficiency of the columnar gravity energy storage system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gravity energy storage, in particular to a columnar gravity energy storage system. Background Art

[0002] Gravity energy storage is a commonly used energy storage technology at present. By adopting this method, the disadvantages of unstable power supply of the power grid caused by over - surplus or insufficient electric energy in wind power generation, solar power generation and other ways can be effectively solved; at the same time, by adopting the gravity energy storage technology, electric energy can be stored during the trough of the power consumption wave and released during the peak of the power consumption wave, so as to achieve the purpose of reducing the power consumption cost.

[0003] For example, the columnar gravity energy storage device and system with the publication number "CN220107584U" realizes the guiding and limiting of the counterweight block during the lifting and lowering process by setting a support cylinder, sleeving the counterweight block outside the support cylinder, and making the two be mutually limited through the guide rail arranged outside the support cylinder and the U - shaped pulley installed on the counterweight block. However, for the existing columnar gravity energy storage device and system, since the redundant electric energy is used to drive the counterweight block to rise during the trough of the power consumption wave to accumulate gravitational potential energy for energy storage, when the accumulated gravitational potential energy is taken, it needs to rely on the fall of the counterweight block. When the counterweight block falls, most of the gravitational potential energy is converted into electric energy for transmission and storage, but some of the gravitational potential energy during the fall will be lost to a certain extent due to the falling resistance and friction, so that the stored energy is difficult to be taken out in the best condition to the greatest extent, resulting in the loss of energy storage of the columnar gravity energy storage device and system, and finally affecting the energy storage efficiency of the columnar gravity energy storage device and system.

[0004] At the same time, for the existing columnar gravity energy storage device and system, since it relies on electric energy to drive mechanical force and pulley structure to lift the counterweight block for energy storage, a large downward pressure will be generated when the counterweight block falls, and this downward pressure will finally directly act on the bottom surface at the bottom end of the columnar gravity energy storage device. After repeated operations of repeated downward extrusion for many times, the bottom base of the columnar gravity energy storage device will inevitably be damaged by the downward pressure or punched out with pits, affecting the overall service life of the columnar gravity energy storage device. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems of low energy storage efficiency and reduced service life of the columnar gravity energy storage device and system, and to propose a columnar gravity energy storage system.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] Design a columnar gravity energy storage system, including a base, a columnar energy storage cylinder and an inner cavity. The inner cavity is fixedly installed inside the columnar energy storage cylinder. The lower part of the columnar energy storage cylinder is fixedly installed at the top of the base. A highly efficient conversion structure for columnar gravity energy storage is provided inside the inner cavity, and a mechanical lifting structure for counterweight is provided at the top of the columnar energy storage cylinder.

[0008] Preferably, the highly efficient conversion structure for columnar gravity energy storage includes a lifting groove and a connecting pipe. The lifting groove is fixedly opened inside the inner cavity. A counterweight is slidably connected to the inner side of the lifting groove. A piston head is fixedly installed at the bottom end of the counterweight. Wear-resistant layers are slidably connected to both sides of the piston head. The wear-resistant layers are fixedly installed on the inner wall of the inner cavity. Two connecting pipes are fixedly connected to the bottom end of the inner cavity. A generator is provided above the two connecting pipes.

[0009] Preferably, the lower ends of the two connecting pipes are connected to the lower part inside the lifting groove, and the upper parts of the two connecting pipes are connected to the upper part inside the lifting groove. The two connecting pipes are fixedly arranged inside the inner cavity and the columnar energy storage cylinder.

[0010] Preferably, the mechanical lifting structure for counterweight includes a support plate and a closing plate. Two support plates are fixedly installed at the top of the columnar energy storage cylinder. Fixed frames are fixedly connected to the ends of the two support plates. Diagonal frames are fixedly connected between the two sides of the two fixed frames and the support plates. Two winches are fixedly installed below the two fixed frames. The output ends of the two winches are fixedly connected with traction cables. The closing plate is fixedly installed at the top of the columnar energy storage cylinder. The two traction cables are movably connected to the closing plate.

[0011] Preferably, the other ends of the two traction cables are fixedly installed above the counterweight, and the inner side of the closing plate is arranged opposite to the top end of the lifting groove.

[0012] Preferably, two water pumps are fixedly installed on both sides of the outer wall of the columnar energy storage cylinder. The inner sides of the two water pumps are arranged inside the two connecting pipes. A plurality of damping blocks are fixedly installed above the base. The upper parts of the plurality of damping blocks are movably connected to the bottom end of the counterweight.

[0013] A columnar gravity energy storage system proposed by the present utility model has the beneficial effects that: through a winch, a counterweight can be pulled upward, and the counterweight is suspended at the top of a lifting groove, storing electrical energy as gravitational potential energy. Then, when it is necessary to extract the stored gravitational potential energy, the winch is shut down to stop pulling the counterweight, and the gravitational potential energy of the counterweight itself can push the piston head to squeeze out the water stored in the lifting groove along the two connecting pipes on both sides. The flowing water will drive the generator to generate electrical energy after passing through the generator. By using a counterweight in the form of a piston to compress water to drive the generator to generate electricity, the energy loss caused during the falling process of the counterweight can be minimized to the greatest extent, and the energy storage efficiency of the columnar gravity energy storage system can be improved.

[0014] The water pump can be connected to a power source to start, and the water squeezed out along the connecting pipe when the counterweight falls is reversely conveyed to the lower part of the counterweight. In this way, the upward pushing force of the water flow can be used to accelerate the upward movement of the counterweight, and the efficiency of accumulating gravitational potential energy is also faster. The damping block adopts multiple hydraulically damped rods arranged in parallel. The damping blocks of multiple hydraulics can buffer the pressure of the counterweight falling when the counterweight reaches the bottom end. In this way, the pressure exerted by the counterweight on the base will also be reduced, and the base is not easily damaged due to repeated lifting and hitting the top of the base, improving the service life of the columnar gravity energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0016] Figure 2 is Figure 1 the front sectional view of

[0017] Figure 3 is Figure 1 the top view of

[0018] Figure 4 is Figure 2 the enlarged sectional view of part A in

[0019] Figure 5 is Figure 2 the enlarged sectional view of part B in

[0020] Figure 6 is Figure 2 the enlarged sectional view of part C in

[0021] In the figure: 1. Base, 2. Columnar energy storage cylinder, 3. Inner cavity, 4. Columnar gravity energy storage high-efficiency conversion structure, 41. Lifting groove, 42. Counterweight, 43. Piston head, 44. Anti-wear layer, 45. Connecting pipe, 46. Generator, 5. Counterweight mechanical lifting structure, 51. Support plate, 52. Fixed frame, 53. Oblique frame, 54. Winch, 55. Towing cable, 56. Sealing plate, 6. Water pump, 7. Damping block. Specific embodiments

[0022] The present utility model will be further described below with reference to the accompanying drawings:

[0023] Embodiment 1:

[0024] Please refer to Figures 1-6 : In this embodiment, a columnar gravity energy storage system includes a base 1, a columnar energy storage cylinder 2 and an inner cavity 3. The inner cavity 3 is fixedly installed inside the columnar energy storage cylinder 2. The lower part of the columnar energy storage cylinder 2 is fixedly installed at the top of the base 1. The base 1 is made of reinforced concrete material by pouring. The columnar energy storage cylinder 2 is made of high-strength stainless steel metal material. The columnar energy storage cylinder 2 directly rests on the lower base 1. Inside the inner cavity 3, there is a columnar gravity energy storage high-efficiency conversion structure 4. At the top of the columnar energy storage cylinder 2, there is a counterweight mechanical lifting structure 5.

[0025] The columnar gravity energy storage high-efficiency conversion structure 4 includes a lifting groove 41 and a connecting pipe 45. The lifting groove 41 is fixedly opened inside the inner cavity 3. A counterweight 42 is slidably connected to the inner side of the lifting groove 41. The counterweight 42 is made of cylindrical reinforced concrete material. The diameter of the counterweight 42 is similar to the inner diameter of the lifting groove 41. A piston head 43 is fixedly installed at the bottom end of the counterweight 42. The piston head 43 is made of rubber material. The rubber-made piston head 43 can move up and down in the lifting groove 41 to push the water flow to generate potential energy. On both sides of the piston head 43, there is an anti-wear layer 44 slidably connected. The anti-wear layer 44 is made of high-strength carbon steel material. The surface of the anti-wear layer 44 is smooth and strong enough to resist the friction and wear caused by the counterweight 42.

[0026] The anti-wear layer 44 is fixedly installed on the inner wall of the inner cavity 3. Two connecting pipes 45 are fixedly connected to the bottom end of the inner cavity 3. Above the two connecting pipes 45, there is a generator 46. The generator 46 is a relatively common latent water flow small-scale hydraulic generator on the market. It is a special type of water flow generator that uses water flow to generate electricity. The design and manufacture of this generator take into account the power conversion efficiency of the water flow and how to operate stably in the natural environment for a long time. The composition of the latent water flow small-scale hydraulic generator includes an excitation or permanent magnet generator, which is installed in a draft tube through a set of water turbine blades and a support frame, and uses the potential energy of water to convert it into electrical energy. When the normal columnar gravity energy storage system performs energy storage work, the excess electricity is output to the winch 54.

[0027] The hoist 54 can pull the counterweight 42 upward for traction. The counterweight 42 is suspended at the top of the lifting groove 41, storing electrical energy as gravitational potential energy. Then, when it is necessary to extract the stored weight potential energy, the traction of the hoist 54 on the counterweight 42 is shut down, and the counterweight 42 presses downward by its own weight. The gravitational potential energy of the counterweight 42 can push the piston head 43 to squeeze out the water stored in the lifting groove 41 along the two connecting pipes 45 on both sides. The water is squeezed and flows. The flowing water will drive the generator 46 to generate electrical energy after passing through the generator 46, which is supplied to the external power transmission line, achieving the effect of accessing the stored energy.

[0028] The counterweight 42 is made of cylindrical reinforced concrete material. The diameter of the counterweight 42 is similar to the inner diameter of the lifting groove 41. The piston head 43 is made of rubber material. The rubber-made piston head 43 can move up and down in the lifting groove 41 to play a role in pushing the water to generate potential energy. The wear-resistant layer 44 is made of high-strength carbon steel material. The surface of the wear-resistant layer 44 is smooth and strong enough to resist the friction and wear caused by the counterweight 42. When the normal columnar gravity energy storage system performs energy storage work, the excess electricity is output to the hoist 54. The hoist 54 can pull the counterweight 42 upward for traction. The counterweight 42 is suspended at the top of the lifting groove 41, storing electrical energy as gravitational potential energy. Then, when it is necessary to extract the stored weight potential energy, the traction of the hoist 54 on the counterweight 42 is shut down, and the counterweight 42 presses downward by its own weight.

[0029] The gravitational potential energy of the counterweight 42 can push the piston head 43 to squeeze out the water stored in the lifting groove 41 along the two connecting pipes 45 on both sides. The water is squeezed and flows. The flowing water will drive the generator 46 to generate electrical energy after passing through the generator 46, which is supplied to the external power transmission line, achieving the effect of accessing the stored energy. By using a piston-type counterweight to compress water to drive the generator to generate electricity, the energy loss caused during the falling process of the counterweight can be minimized to improve the energy storage efficiency of the columnar gravity energy storage system.

[0030] The lower ends of the two connecting pipes 45 are connected to the lower part inside the lifting groove 41, and the upper parts of the two connecting pipes 45 are connected to the upper part inside the lifting groove 41. The two connecting pipes 45 are fixedly arranged inside the inner cavity 3 and on the inner side of the columnar energy storage cylinder 2.

[0031] On both sides of the outer wall of the columnar energy storage cylinder 2, two water pumps 6 are fixedly installed. The water pumps 6 can be started by connecting to a power source, and the water extruded along the connecting pipe 45 when the counterweight 42 falls is reversely conveyed to the lower part of the counterweight 42. In this way, the upward pushing force of the water flow can be used to accelerate the upward movement of the counterweight 42, and the efficiency of storing gravitational potential energy is also faster. The inner sides of the two water pumps 6 are arranged inside the two connecting pipes 45. Above the inside of the base 1, a plurality of damping blocks 7 are fixedly installed. The damping blocks 7 are composed of a plurality of hydraulically damped rods arranged in parallel. The damping blocks 7 of the plurality of hydraulic dampers can buffer the pressure of the counterweight 42 when it falls to the bottom end. In this way, the pressure exerted by the counterweight 42 on the base 1 will also decrease accordingly, and the base 1 is not easily damaged by repeatedly hitting the top of the base 1 due to the repeated lifting and lowering. The upper parts of the plurality of damping blocks 7 are movably connected to the bottom end of the counterweight 42;

[0032] The water pumps 6 can be started by connecting to a power source, and the water extruded along the connecting pipe 45 when the counterweight 42 falls is reversely conveyed to the lower part of the counterweight 42. In this way, the upward pushing force of the water flow can be used to accelerate the upward movement of the counterweight 42, and the efficiency of storing gravitational potential energy is also faster. The damping blocks 7 are composed of a plurality of hydraulically damped rods arranged in parallel. The damping blocks 7 of the plurality of hydraulic dampers can buffer the pressure of the counterweight 42 when it falls to the bottom end. In this way, the pressure exerted by the counterweight 42 on the base 1 will also decrease accordingly, and the base 1 is not easily damaged by repeatedly hitting the top of the base 1 due to the repeated lifting and lowering, thus extending the service life of the columnar gravity energy storage system.

[0033] Working principle:

[0034] When using the columnar gravity energy storage system, during the trough of the power consumption wave, the excess electric energy is conveyed to the structure that lifts the counterweight by using electric energy, and then the gravitational potential energy generated when the lifted counterweight falls is used for power generation, achieving energy storage through a mechanical structural method;

[0035] Gravity-driven water flow power generation structure of the columnar gravity energy storage system:

[0036] The counterweight 42 is made of cylindrical reinforced concrete material. The diameter of the counterweight 42 is similar to the inner diameter of the lifting groove 41. The piston head 43 is made of rubber material. The rubber-made piston head 43 can move up and down in the lifting groove 41 to push the water flow and generate potential energy. The anti-wear layer 44 is made of high-strength carbon steel material. The surface of the anti-wear layer 44 is smooth and strong enough to resist the friction and wear caused by the counterweight 42. When the normal columnar gravity energy storage system performs energy storage work, the excess electricity is output to the winch 54. The winch 54 can pull the counterweight 42 upward. The counterweight 42 is suspended at the top of the lifting groove 41, and the electrical energy is stored as gravitational potential energy. Then, when it is necessary to extract the stored gravitational potential energy, the winch 54 is shut down to stop pulling the counterweight 42. The counterweight 42 presses downward by its own weight. The gravitational potential energy of the counterweight 42 can push the piston head 43 to squeeze out the water stored in the lifting groove 41 along the two-side connecting pipes 45. The water flow is squeezed and flows. The flowing water flow will drive the generator 46 to generate electrical energy after passing through the generator 46, and supply it to the external power transmission line to achieve the effect of retrieving the stored energy;

[0037] The damping buffer and reverse water flow conveying auxiliary counterweight rising structure of the columnar gravity energy storage system:

[0038] The water pump 6 can be connected to the power supply to start, and reverse the water squeezed out along the connecting pipe 45 when the counterweight 42 falls to the lower part of the counterweight 42. In this way, the upward pushing force of the water flow can be used to accelerate the upward movement of the counterweight 42, and the efficiency of accumulating gravitational potential energy is also faster. The damping block 7 adopts a plurality of hydraulically damped rods arranged in parallel. The damping blocks 7 of the plurality of hydraulic dampings can start to buffer the falling pressure of the counterweight 42 when the counterweight 42 falls to the bottom end. In this way, the pressure exerted by the counterweight 42 on the base 1 will also decrease, and the base 1 is not easily damaged due to repeated lifting and hitting the top of the base 1.

[0039] Embodiment 2:

[0040] Please refer to Figures 1-6: In this embodiment, a columnar gravity energy storage system further includes a counterweight mechanical lifting structure 5, which includes a support plate 51 and a closing plate 56. The support plate 51 is welded and fixed above the columnar energy storage cylinder 2. Two support plates 51 are fixedly installed at the top of the columnar energy storage cylinder 2. Fixed frames 52 are fixedly connected to the ends of the two support plates 51. Diagonal frames 53 are fixedly connected between the two sides of the two fixed frames 52 and the support plate 51. The diagonal frames 53 and the fixed frames 52 are made of high-hardness aluminum alloy frames, which can form a certain supporting effect with the support plate 51. Two winches 54 are fixedly installed below the two fixed frames 52. The winches 54 use hydraulic winches on the market, which are light and small lifting equipment that uses a drum to wind a steel wire rope or chain to lift or tow heavy objects, also known as winches. Winches can vertically lift, horizontally or obliquely tow heavy objects. In this way, when the winches 54 are connected to the valley electricity, they will pull the counterweight 42 up along the towing cable 55, converting electrical energy into the pulling mechanical energy for lifting the counterweight 42. The output ends of the two winches 54 are fixedly connected to a towing cable 55. The closing plate 56 is fixedly installed at the top of the columnar energy storage cylinder 2. The closing plate 56 is made of stainless steel metal material. A rubber gasket is filled at the connection position between the closing plate 56 and the towing cable 55. In this way, the closing plate 56 can form a certain enclosed space inside the lifting groove 41, facilitating the transportation of water flow. The two towing cables 55 are movably connected to the closing plate 56. The other ends of the two towing cables 55 are fixedly installed above the counterweight 42. The inner side of the closing plate 56 is arranged opposite to the top end of the lifting groove 41.

[0041] Working principle:

[0042] The support plate 51 is welded and fixed above the columnar energy storage cylinder 2. Diagonal frames 53 are fixedly connected between the two sides of the two fixed frames 52 and the support plate 51. The diagonal frames 53 and the fixed frames 52 are made of high-hardness aluminum alloy frames, which can form a certain supporting effect with the support plate 51. The winches 54 use hydraulic winches on the market, which are light and small lifting equipment that uses a drum to wind a steel wire rope or chain to lift or tow heavy objects, also known as winches. Winches can vertically lift, horizontally or obliquely tow heavy objects. In this way, when the winches 54 are connected to the valley electricity, they will pull the counterweight 42 up along the towing cable 55, converting electrical energy into the pulling mechanical energy for lifting the counterweight 42. The closing plate 56 is made of stainless steel metal material. A rubber gasket is filled at the connection position between the closing plate 56 and the towing cable 55. In this way, the closing plate 56 can form a certain enclosed space inside the lifting groove 41, facilitating the transportation of water flow.

[0043] Although the present utility model has been illustrated and described by reference to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details may be made within the scope of the claims.

Claims

1. A columnar gravity energy storage system, comprising a base (1), a columnar energy storage cylinder (2) and an inner cavity (3), wherein the inner cavity (3) is fixedly mounted inside the columnar energy storage cylinder (2), and the lower part of the columnar energy storage cylinder (2) is fixedly mounted on the top of the base (1), characterized in that: A columnar gravity energy storage high-efficiency conversion structure (4) is provided inside the inner cavity (3), and a counterweight mechanical lifting structure (5) is provided at the top of the columnar energy storage cylinder (2); The columnar gravity energy storage high-efficiency conversion structure (4) comprises a lifting groove (41) and a connecting pipe (45), wherein the lifting groove (41) is fixedly opened inside the inner cavity (3), a counterweight block (42) is slidably connected to the inner side of the lifting groove (41), a piston head (43) is fixedly installed at the bottom end of the counterweight block (42), anti-wear layers (44) are slidably connected to both sides of the piston head (43), and the anti-wear layers (44) are fixedly installed on the inner wall of the inner cavity (3), two connecting pipes (45) are fixedly connected to the bottom end of the inner cavity (3), and a generator (46) is provided above the two connecting pipes (45); The lower ends of the two connecting tubes (45) are connected to the lower part of the interior of the lifting groove (41), and the upper parts of the two connecting tubes (45) are connected to the upper part of the interior of the lifting groove (41). The two connecting tubes (45) are fixedly arranged on the inner side of the inner cavity (3) and the columnar energy storage cylinder (2); The counterweight mechanical lifting structure (5) comprises a support plate (51) and a closing plate (56), wherein the two support plates (51) are fixedly mounted on the top of the columnar energy storage cylinder (2), the ends of the two support plates (51) are fixedly connected with a fixing frame (52), the two sides of the two fixing frames (52) are fixedly connected with an oblique frame (53) between the support plates (51), two winches (54) are fixedly mounted below the two fixing frames (52), the output ends of the two winches (54) are fixedly connected with a traction rope (55), the closing plate (56) is fixedly mounted on the top of the columnar energy storage cylinder (2), and the two traction ropes (55) are movably connected to the closing plate (56).

2. A columnar gravity energy storage system according to claim 1, characterized in that: The other ends of the two traction ropes (55) are fixedly mounted above the counterweight block (42), and the inner side of the closing plate (56) is arranged opposite to the top end of the lifting slot (41).

3. A columnar gravity energy storage system according to claim 2, characterized in that: Two water pumps (6) are fixedly installed on both sides of the outer wall of the columnar energy storage cylinder (2), and the inner sides of the two water pumps (6) are arranged inside the two connecting pipes (45). A plurality of damping blocks (7) are fixedly installed on the upper part of the interior of the base (1), and the upper parts of the plurality of damping blocks (7) are movably connected to the bottom end of the counterweight block (42).

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