Power transmission device of gravity energy storage system

Abstract

The invention relates to the technical field of gravity energy storage, in particular to a power transmission device of a gravity energy storage system.The power transmission device comprises a driving structure, a conveying table and a protective cover arranged at the top end of the conveying table, a double-layer chain structure is installed in the protective cover, and a chain on each side is of a double-layer design; a gap is reserved between the two chains of the double-layer chain structure, and the two chains are connected through a cross rod; the braking assembly comprises a mass block bearing vehicle arranged at the top end of the double-layer chain structure, barb sawteeth are arranged on the two sides of the mass block bearing vehicle, a mass block is placed on the mass block bearing vehicle, and the braking assembly can better adapt to the size of the mass block bearing vehicle through a double-layer chain; and the stability and the reliability of the bearing vehicle in the ascending or descending process are ensured. Due to the gaps between the chains and the design of the connecting cross rods, barb sawteeth of the bearing vehicle can be embedded into grooves of the chains more stably, and therefore shaking and deviation possibly occurring in the running process are greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gravity energy storage, and in particular to a power transmission device of a gravity energy storage system. Background Art

[0002] Gravity energy storage is a way of using solid media to complete mechanical and physical energy storage. Its basic principle is to use electricity to lift mass blocks to a high place to store gravitational potential energy, and release these mass blocks when needed, so that they fall and drive the generator to rotate to generate electricity. This method has the advantage of freedom of height drop, so the energy storage efficiency is high. It is also environmentally friendly and safe, does not produce harmful substances, and has relatively low requirements for geographical conditions.

[0003] In the traditional slope gravity energy storage system, the mass block and the docking trolley are usually integrated. This design lacks the function of parking and transfer on the slope, resulting in the storage and release of gravitational potential energy not being smooth. In addition, the power transmission device in the prior art mostly adopts a single chain and a groove, that is, the single chain rotates to drive the trolley to move on the track. However, this design has some defects:

[0004] Large friction loss: Since the grooves of a single chain are small, this will increase the friction between the chain and the small workshop, thereby increasing system losses and reducing energy conversion efficiency.

[0005] Insufficient stability: The single chain design may not fully ensure the stability of the load-carrying vehicle during operation, especially over long distances or on steep slopes.

[0006] Safety issues: The lack of an effective emergency braking mechanism makes it difficult to stop the mass-carrying vehicle quickly and effectively in the event of an emergency, increasing potential safety risks. Summary of the invention

[0007] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0008] In view of the problem that the above-mentioned single chain design may not be able to fully guarantee the stability of the load-bearing vehicle during operation, the present invention is proposed.

[0009] Therefore, an object of the present invention is to provide a power transmission device for a gravity energy storage system.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: a power transmission device of a gravity energy storage system, comprising: a driving structure, comprising a conveying platform, a protective cover arranged at the top of the conveying platform, a double-layer chain structure is installed inside the protective cover, each side chain adopts a double-layer design, and a gap is left between the two chains of the double-layer chain structure and connected by a cross bar; and

[0011] The brake assembly includes a mass block carrier vehicle arranged at the top of the double-layer chain structure, the mass block carrier vehicle is equipped with barbed serrations on both sides, and the mass block is placed on the mass block carrier vehicle; an emergency brake component is installed on the slope of the protective cover, and the emergency brake component is activated to emergency brake the mass block carrier vehicle when an unexpected safety problem occurs.

[0012] As a preferred solution of the power transmission device of the gravity energy storage system described in the present invention, wherein: the two adjacent cross bars in the double-layer chain structure are a group, the distance between the groups is equal to the width of the root of the barbed serrations in the mass block carrier, and the distance between the two adjacent groups should be equal to the distance between the roots of the two adjacent barbs of the carrier.

[0013] As a preferred solution of the power transmission device of the gravity energy storage system of the present invention, the cross bar is made of rigid material, which can support and drive the mass block and the mass block carrying vehicle to move up and down in the double-layer chain structure.

[0014] As a preferred solution of the power transmission device of the gravity energy storage system of the present invention, the brake assembly also includes a central protrusion arranged at the bottom of the mass block carrier vehicle, and the protrusion matches the size of the groove below the mass block to ensure a stable connection.

[0015] As a preferred solution of the power transmission device of the gravity energy storage system of the present invention, the mass block carrying vehicle is replaced by the barbed serrations.

[0016] As a preferred solution of the power transmission device of the gravity energy storage system of the present invention, the emergency brake comprises a hydraulic pump and an inverted triangle device, the hydraulic pump is controlled by a brake switch, and the operation of the hydraulic pump causes the inverted triangle device to pop out and jam the mass block carrier vehicle.

[0017] As a preferred solution of the power transmission device of the gravity energy storage system of the present invention, the cross bar is of a detachable type, and the installation interval of the cross bar is adjusted according to the size of the mass block carrier and the barbed serrations.

[0018] As a preferred solution of the power transmission device of the gravity energy storage system of the present invention, gears for driving the chain to rotate are installed at the upper and lower ends of the slope, and the two gears on one side respectively cooperate with the grooves between the double-layer chain structure.

[0019] As a preferred solution of the power transmission device of the gravity energy storage system of the present invention, the mass block is rectangular in design and is located at the top of the protrusion.

[0020] As a preferred solution of the power transmission device of the gravity energy storage system of the present invention, the double-layer chain structure is composed of an inner chain plate and an outer chain plate, wherein the inner chain plate and the outer chain plate are connected by a sleeve.

[0021] Beneficial effects of the present invention: Compared with the traditional single chain design, the double-layer chain of the present invention can better adapt to the size of the mass carrier, ensuring the stability and reliability of the carrier during the ascent or descent process. The spacing between the chains and the design of the connecting crossbars enable the barbed serrations of the carrier to be more firmly embedded in the chain groove, thereby greatly reducing the shaking and offset that may occur during operation. Since the crossbar spacing in the chain group is carefully designed, the width of the barbed root of the carrier perfectly matches the chain groove, which not only improves the fit between the carrier and the chain, but also reduces the friction between the two, reduces the mechanical loss of the system, and thus improves the energy conversion efficiency of the entire system. The hydraulically driven inverted triangle device installed on the slope can be quickly started in an emergency, effectively brake the mass carrier, prevent it from sliding out of control, and ensure the safety of the operator and the reliability of the system. Multiple inverted triangle devices are distributed along the slope to ensure that braking can be carried out in time even when the carrier fails, minimizing the risk of accidents. The traditional wheel hub design is abandoned and replaced by barbed serrations, eliminating the friction between the trolley and the ground, further reducing the loss of the system. In addition, this design also enhances the fixation of the carrier on the chain, avoiding instability caused by wheel slippage or wear. The chain crossbar is designed to be detachable, and the installation interval can be adjusted according to different specifications of mass block carriers, which improves the flexibility and adaptability of the device. At the same time, it is also convenient for maintenance and replacement of parts, reducing maintenance costs. By reasonably increasing the number of chain groups, the mechanical strength requirements of a single chain connecting rod can be reduced without affecting the overall performance, saving material costs and improving the overall stability of the system.

[0022] In summary, it not only solves the problem of insufficient stability in the traditional single-chain design, but also significantly improves the system's operating stability, safety and energy conversion efficiency through a series of innovative design improvements, providing a more reliable and efficient energy storage solution for the new energy grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without any creative labor.

[0024] Figure 1 It is an overall schematic diagram of a power transmission device of a gravity energy storage system.

[0025] Figure 2 The figure is a top view of the overall structure of a power transmission device of a gravity energy storage system.

[0026] Figure 3 The diagram is a schematic diagram of the barbed teeth and crossbar position structure of a power transmission device of a gravity energy storage system.

[0027] Figure 4 The figure is a schematic diagram of the structure of an emergency brake component of a power transmission device of a gravity energy storage system.

[0028] Figure 5 The present invention is a schematic diagram of a hydraulic device of a power transmission device of a gravity energy storage system.

[0029] Reference numerals:

[0030] 100. driving structure; 101. conveying platform; 102. protective cover; 103. double-layer chain structure; 104. cross bar;

[0031] 200, brake assembly; 201, mass carrier; 202, barbed sawtooth; 203, ramp; 204, emergency brake; 205, protrusion; 206, gear;

[0032] 103a, inner link plate; 103b, outer link plate; 103c, sleeve;

[0033] 204a, hydraulic pump; 204b, inverted triangle device; 204c, brake switch. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0038] Example 1, reference Figure 1 to Figure 4 , which is the first embodiment of the present invention, provides a power transmission device for a gravity energy storage system, including, which is designed to achieve efficient conversion between electrical energy and mechanical energy and ensure the safety and reliability of system operation.

[0039] Specifically, the driving structure 100 includes a conveying platform 101, a protective cover 102 arranged at the top of the conveying platform 101, and a double-layer chain structure 103 is installed inside the protective cover 102. The chain on each side adopts a double-layer design. There is a gap between the two chains of the double-layer chain structure 103 and they are connected by a cross bar 104. The cross bar 104 is made of a rigid material, and its function is to support and drive the mass block and the mass block carrier 201 to move up and down along the double-layer chain structure 103. In order to ensure the smooth movement of the mass block carrier 201, two adjacent cross bars 104 in the double-layer chain structure 103 are a group, and the distance between the groups is equal to the width of the root of the barbed saw teeth 202 in the mass block carrier 201; the distance between two adjacent groups should be equal to the distance between the roots of two adjacent barbed saw teeth 202 of the mass block carrier 201. This design ensures that the mass block carrier 201 can be accurately inserted into the chain structure, avoiding the sliding or falling phenomenon that may occur during the rising or falling process.

[0040] Furthermore, two adjacent crossbars 104 in the double-layer chain structure 103 form a group, and the distance between the groups is equal to the width of the root of the barbed serrations 202 in the mass carrier 201. The distance between two adjacent groups should be equal to the distance between the roots of two adjacent barbed serrations 202 in the mass carrier 201. The double-layer chain structure 103 is composed of an inner link plate 103a and an outer link plate 103b, which are connected by a sleeve 103c. Such a design not only improves the durability and tensile strength of the chain, but also ensures the stable performance of the chain under long-term operation.

[0041] Furthermore, the crossbar 104 is made of a rigid material, and can support and drive the mass block and the mass block carrier 201 to move up and down on the double-layer chain structure 103 .

[0042] Furthermore, the double-layer chain structure 103 is composed of an inner link plate 103a and an outer link plate 103b, wherein the inner link plate 103a and the outer link plate 103b are connected via a sleeve 103c.

[0043] Operation process: When there is abundant electric energy in the power grid, this electric energy is used to drive the motor to rotate the gear 206, thereby driving the double-layer chain structure 103 and the mass block carrier 201 connected thereto to move upward. As the mass block is lifted to the top of the slope 203, its electric energy is converted into gravitational potential energy. Afterwards, the mass block is unloaded from the mass block carrier 201 by a forklift and a crane, and transferred to the stacking area to store energy. When the stored energy needs to be released, the mass block is loaded onto the mass block carrier 201 again. At this time, the mass block carrier 201 moves down the slope by its own gravity. This process drives the double-layer chain structure 103 and the gear 206 to rotate, thereby causing the motor (i.e., the motor mentioned above, in this case as a generator) to rotate, and converts the gravitational potential energy of the mass block into electric energy for use in the power grid. In the event of an emergency safety situation, the brake switch 204c is activated, and the hydraulic pump 204a immediately works to eject the inverted triangle device 204b installed on the slope 203. These inverted triangle devices are distributed along the slope and can clamp the mass carrier vehicle 201 at any position, ensuring rapid braking even in the event of a failure, thereby ensuring the safety of the system.

[0044] Example 2, reference Figure 1 to Figure 4 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: this embodiment pays special attention to improving the safety of the system, and enhances its stability and reliability on the double-layer chain structure 103 by optimizing the design of the mass block carrier 201.

[0045] Specifically, the braking assembly 200 includes a mass block carrier 201 arranged at the top of the double-layer chain structure 103. The mass block carrier 201 is equipped with barbed serrations 202 on both sides. The mass block is placed on the mass block carrier 201. An emergency brake component 204 is installed on the slope 203 of the protective cover 102. When an unexpected safety problem occurs, the emergency brake component 204 is activated to emergency brake the mass block carrier 201.

[0046] Furthermore, the brake assembly 200 also includes a central protrusion 205 disposed at the bottom of the mass-carrying vehicle 201 , and the protrusion 205 matches the size of the groove below the mass to ensure a stable connection.

[0047] Furthermore, the mass bearing vehicle 201 is replaced by barbed serrations 202 .

[0048] The rest of the structure is the same as that of Example 1.

[0049] Operation process: When there is sufficient electric energy in the power grid, this electric energy drives the motor to make the gear 206 rotate.

[0050] The gear 206 drives the double-layer chain structure 103 to rotate, thereby causing the mass block carrier 201 equipped with the barbed saw teeth 202 and the mass block thereon to move upward together. After the mass block is lifted to the top of the slope 203, the mass block is unloaded from the mass block carrier 201 by a forklift and a crane, and transferred to the stacking area to store energy. The unloaded mass block carrier 201 continues to move downward along the chain, ready for the next round of energy storage. When the stored energy needs to be released, the mass block is loaded onto the mass block carrier 201 again, and at this time the mass block carrier 201 moves downward along the slope by its own gravity. This process drives the double-layer chain structure 103 and the gear 206 to rotate, thereby causing the motor to rotate, and converting the gravitational potential energy of the mass block into electric energy for use in the power grid. In the event of an emergency safety situation, the brake switch 204c is started, and the hydraulic pump 204a immediately works to eject the inverted triangle device 204b installed on the slope 203. The inverted triangle device 204b is distributed along the slope and can clamp the mass carrier 201 at any position, ensuring rapid braking even in the event of a fault, thereby ensuring the safety of the system. The design of the central protrusion 205 ensures that even in the case of emergency braking, the mass block will not slide or detach from the mass carrier 201 due to inertia, further improving the stability of the system.

[0051] Example 3, reference Figure 1 to Figure 5 , which is the third embodiment of the present invention, is different from the above embodiments in that: by optimizing the design of the emergency brake 204, introducing the adjustable crossbar 104 and improving the gear transmission mechanism, not only the flexibility and safety of the system are improved, but also an efficient energy conversion process is ensured. In addition, the cooperation between the rectangular mass block and the protrusion 205 further enhances the stability of the system, which is suitable for efficient and safe operation under various working conditions.

[0052] Specifically, the emergency brake component 204 includes a hydraulic pump 204 a and an inverted triangle device 204 b . The hydraulic pump 204 a is controlled by a brake switch 204 c . When the hydraulic pump 204 a works, the inverted triangle device 204 b pops out to clamp the mass-carrying vehicle 201 .

[0053] Furthermore, the cross bar 104 is of a detachable type, and the installation interval of the cross bar 104 is adjusted according to the size of the mass block carrier 201 and the barbed serrations 202 .

[0054] Furthermore, gears 206 for driving the chain to rotate are installed at the upper and lower ends of the ramp 203 , and the two gears 206 on one side are respectively matched with the grooves between the double-layer chain structure 103 .

[0055] Furthermore, the mass block is designed to be rectangular and is located at the top of the protrusion 205 .

[0056] The rest of the structure is the same as that of Example 2.

[0057] Operation process: The gravity energy storage system has two working conditions, namely, the charging working process and the discharging working process. In order to deal with sudden safety situations, the present invention has designed a third working condition. The following describes these three conditions in detail:

[0058] First, the charging process, the generator rotates to drive the gear 206 to rotate, the gear 206 rotates to drive the double-layer chain structure 103 and the mass block carrier 201 stuck in the chain groove and the mass block on the car to move upward together, and the abundant electric energy in the power grid is converted into the gravitational potential energy of the mass block through the rotation of the generator. After the mass block reaches the top of the slope 203, the forklift and the crane cooperate to transfer the mass block to the stacking area to store energy. After the mass block is unloaded, the empty mass block carrier 201 moves to the bottom of the slope 203 through the chain to prepare for the next energy storage.

[0059] During the charging process, the mass block is transported to the mass block carrier 201 by a crane and a forklift. The mass block carrier 201 drives the transmission device composed of the double-layer chain structure 103 and the gear 206 to rotate by its own gravity, thereby driving the motor to rotate and convert the gravitational potential energy of the mass block into electrical energy. After the mass block carrier 201 reaches the bottom, it waits for the next energy storage.

[0060] In case of sudden safety situations, the brake switch 204c is started, and the hydraulic pump 204a works immediately after being energized to pop out the inverted triangle device 11 installed on the slope 203. The inverted triangle device 11 will then play a role in clamping the mass block carrier 8 to complete the braking. There are many inverted triangle devices 204b on the slope, and the interval of each section will be less than the safe distance of the carrier vehicle in case of failure to ensure that the braking of the mass block carrier 201 can be completed.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A power transmission device for a gravity energy storage system, characterized in that: include, The driving structure (100) comprises a conveying platform (101), a protective cover (102) arranged at the top of the conveying platform (101), a double-layer chain structure (103) installed inside the protective cover (102), each side chain adopts a double-layer design, and a gap is left between the two chains of the double-layer chain structure (103) and they are connected by a cross bar (104); and, The brake assembly (200) comprises a mass-carrying vehicle (201) arranged at the top of the double-layer chain structure (103), the mass-carrying vehicle (201) being provided with barbed saw teeth (202) on both sides, and a mass being placed on the mass-carrying vehicle (201); an emergency brake component (204) being installed on the slope (203) of the protective cover (102), and the emergency brake component (204) being activated to emergency brake the mass-carrying vehicle (201) when a sudden safety problem occurs.

2. The power transmission device of the gravity energy storage system according to claim 1, characterized in that: Two adjacent cross bars (104) in the double-layer chain structure (103) form a group, and the distance between the groups is equal to the width of the roots of the barbed saw teeth (202) in the mass-carrying vehicle (201), and the distance between two adjacent groups should be equal to the distance between the roots of two adjacent barbed saw teeth (202) in the mass-carrying vehicle (201).

3. The power transmission device of the gravity energy storage system according to claim 2, characterized in that: The crossbar (104) is made of a rigid material and is capable of supporting and driving the mass block and the mass block carrying vehicle (201) to move up and down on the double-layer chain structure (103).

4. The power transmission device of the gravity energy storage system according to claim 3, characterized in that: The brake assembly (200) further comprises a central protrusion (205) arranged at the bottom of the mass-carrying vehicle (201), wherein the protrusion (205) matches the size of the groove below the mass to ensure a stable connection.

5. The power transmission device of the gravity energy storage system according to claim 4, characterized in that: The mass-carrying vehicle (201) is replaced by the barbed sawtooth (202).

6. The power transmission device of the gravity energy storage system according to claim 5, characterized in that: The emergency brake component (204) comprises a hydraulic pump (204a) and an inverted triangle device (204b). The hydraulic pump (204a) is controlled by a brake switch (204c). When the hydraulic pump (204a) works, the inverted triangle device (204b) pops out and blocks the mass-carrying vehicle (201).

7. The power transmission device of the gravity energy storage system according to claim 6, characterized in that: The cross bar (104) is of a detachable type, and the installation interval of the cross bar (104) is adjusted according to the size of the mass-bearing vehicle (201) and the barbed saw teeth (202).

8. The power transmission device of the gravity energy storage system according to claim 7, characterized in that: Gears (206) for driving the chain to rotate are installed at the upper and lower ends of the ramp (203), and the two gears (206) on one side are respectively matched with the grooves between the double-layer chain structure (103).

9. The power transmission device of the gravity energy storage system according to claim 8, characterized in that: The mass block is rectangular in design and is located at the top of the protrusion (205).

10. The power transmission device of the gravity energy storage system according to claim 9, characterized in that: The double-layer chain structure (103) is composed of an inner link plate (103a) and an outer link plate (103b), wherein the inner link plate (103a) and the outer link plate (103b) are connected via a sleeve (103c).

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