Hydraulic drive device for trough solar concentrator

Abstract

The utility model relates to a kind of slot type solar concentrator hydraulic drive device, including concentrator push-pull oil cylinder and its hydraulic drive system, the oil tank of hydraulic drive system is connected with energy accumulator, concentrator push-pull oil cylinder by motor and pump group unit, high-pressure pipeline, valve control unit, the oil tank is aluminum alloy die-casting oil tank, the aluminum alloy die-casting oil tank upper along with the platform lower surface is sealed, waterproof, dust cover is installed on platform upper portion, platform one side fixed mounting adapter mounting vertical plate, the both sides of waterproof, dust cover are equipped with quick detach buckle, so the connection between dust cover and oil tank is fixed without bolt connection, just press buckle, dust cover can be locked, greatly reduce the work hour amount of disassembly and assembly, improve installation efficiency, save time cost.The utility model is resistant to-40°C low temperature, waterproof and dustproof performance is high, with good protective performance, easy to repair and maintain, can be stable under harsh environment, high precision and high service life.

Description

Technical Field

[0001] This utility model relates to the field of new energy solar thermal power generation technology, specifically to a hydraulic drive device for a trough-type solar concentrator. Background Technology

[0002] A parabolic trough solar power system is a solar thermal power generation device that uses parabolic trough mirrors to focus sunlight and heat the heat transfer medium to generate electricity. The core of a parabolic trough solar power system is a concentrating solar field composed of parabolic trough mirror collectors. Linear focusing technology heats the heat transfer fluid, and a computer-controlled unit synchronously tracks the sun. The three key technologies of a parabolic trough solar power system are the concentrating mirrors, the tracking drive system, and the linear focusing collector tubes. Each parabolic trough solar power system is equipped with a solar tracking drive system. Existing solar tracking drive systems mainly include mechanical-electric control tracking systems and proportional hydraulic tracking systems. The proportional hydraulic tracking system, with its high climate adaptability, precise control, and ease of maintenance, has superior application advantages compared to the mechanical-electric control tracking system, and its adoption is much larger.

[0003] The existing hydraulic drive unit for parabolic trough solar concentrators mainly consists of an oil tank, electric motor, pump, control valve group, and sensor assembly. Since the equipment is mostly installed in harsh environments such as Gobi Desert, the existing drive unit has poor low-temperature resistance, especially extreme low-temperature performance of -40℃, and frequent failures occur at -40℃. In addition, due to poor preventive measures, the oil is extremely prone to emulsification during heavy rain, heavy snow, and salt spray, which affects the normal operation of the hydraulic drive unit. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art and provide a hydraulic drive device for a trough-type solar concentrator. It can be used in areas with harsh natural environments such as the Gobi Desert and deserts. It can withstand low temperatures of -40°C and excessively high ultraviolet radiation. It has high waterproof and dustproof performance, good protective performance, and is easy to repair and maintain. Thus, it can maintain the stability, high precision and long service life of the device in harsh environments.

[0005] The technical problem solved by this utility model is achieved through the following technical solution:

[0006] A hydraulic drive device for a trough-type solar concentrator includes a concentrator push-pull cylinder and its hydraulic drive system. The hydraulic drive system includes an oil tank, an accumulator, and a motor and pump unit, a valve control unit, and high-pressure pipelines integrated and installed on the upper part of a platform. The oil tank is connected to the accumulator and the concentrator push-pull cylinder via the motor and pump unit, high-pressure pipelines, and valve control unit. The oil tank is characterized by being a die-cast aluminum alloy tank, with its upper edge sealed to the lower surface of the platform. A waterproof and dustproof cover is installed on the upper part of the platform, and the two side plates of the waterproof and dustproof cover are equipped with quick-release buckles. The waterproof and dustproof cover is connected to the die-cast aluminum alloy oil tank via these quick-release buckles.

[0007] Furthermore, a sealing ring groove is formed along the upper edge of the aluminum alloy die-cast oil tank, and a sealing ring is embedded in the sealing ring groove. The aluminum alloy die-cast oil tank is sealed to the platform through the sealing ring.

[0008] Furthermore, the specific structure of the hydraulic drive system is as follows: the motor and pump unit includes a motor and a gear pump, which are connected by a coupling; the inlet of the gear pump is connected to the oil tank via a suction filter; the oil tank is equipped with a level and temperature gauge and a moisture-absorbing air filter unit; the outlet of the gear pump is connected to a return oil line via an oil outlet pipeline, a check valve, and a relief valve, and then to a return oil line via a return oil filter; the high-pressure line one of the gear pump's oil outlet pipeline is connected to the accumulator, and the high-pressure line two is connected to the first directional valve via a first on / off ball valve; the high-pressure line three is connected to the second directional valve via a second on / off ball valve and a speed regulating valve; the first directional valve is connected to the first push-pull cylinder via high-pressure oil line branch one, high-pressure oil line branch two, a first balance valve, and a second balance valve; the second directional valve is connected to the second push-pull cylinder via high-pressure oil line branch three, high-pressure oil line branch four, a third balance valve, and a fourth balance valve; the oil outlet pipeline is connected to the oil tank pressure gauge and a pressure sensor.

[0009] Furthermore, a mounting plate for the adapter is fixedly installed on one side of the platform, and one side of the waterproof and dustproof cover has an installation space for engaging the mounting plate for the adapter. Therefore, the mounting plate does not need to be disassembled when removing or assembling the waterproof and dustproof cover. The high-pressure oil pipe branches one, two, three, and four, as well as the return oil pipe, pass through the mounting plate for the adapter via high-pressure pipe adapters. The solenoid valve terminals of the valve control unit are located on the mounting plate for the adapter, and the oil tank pressure gauge is fixedly installed on the mounting plate for the adapter.

[0010] Furthermore, the valve control unit wiring terminals are low-temperature resistant terminals.

[0011] Furthermore, the moisture-absorbing air filter unit includes a moisture-absorbing air filter and a desiccant box installed at its lower part, which displays the moisture absorption status of the moisture-absorbing air filter.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model relates to a hydraulic drive device for a trough-type solar concentrator. It employs a die-cast aluminum alloy oil tank. A sealing ring mounting groove is formed along the upper edge of the tank, and a sealing ring is embedded within this groove. The lower surface of the motor mounting plate is sealed to the die-cast aluminum alloy oil tank via a cover sealing ring, thereby improving the tank's sealing performance and low-temperature resistance. A waterproof and dustproof cover is installed on the upper part of the die-cast aluminum alloy oil tank. This cover completely encloses the drive device's motor pump unit, valve control unit, inlet and return oil filter unit, and moisture-absorbing air filter, thus improving the overall waterproof, snowproof, and dustproof performance of the equipment. The side panels are equipped with quick-release buckles. The waterproof and dustproof cover is connected to the die-cast aluminum alloy oil tank via these buckles. This eliminates the need for bolts; simply pressing the buckles locks the dust cover in place. This allows for rapid assembly and maintenance in harsh environments, reducing the time required for manual installation and maintenance. It significantly reduces disassembly and assembly time, improves installation efficiency, and saves labor costs. Furthermore, the waterproof and dustproof cover is made of carbon steel and coated to enhance its UV resistance, preventing aging of internal pipes and valve components and extending the equipment's lifespan.

[0014] 2. The hydraulic drive device for the trough-type solar concentrator of this utility model has an adapter mounting plate fixedly installed on the upper edge of the die-cast aluminum alloy oil tank. The adapter mounting plate is equipped with a connector for the hydraulic unit oil pipe and a pressure gauge. The aforementioned waterproof and dustproof cover has a notch that engages with the adapter mounting plate, thereby enabling quick disassembly and assembly of the waterproof and dustproof cover without removing the high-pressure pipeline adapter, oil tank pressure gauge, wiring terminals, etc., without affecting the normal operation of the equipment, and improving the convenience of equipment installation and maintenance.

[0015] 3. The hydraulic drive device for the trough-type solar concentrator of this utility model has a desiccant box installed in the moisture-absorbing air filter. This allows the saturation state of the moisture-absorbing air filter to be observed by external observation of the desiccant color. This facilitates replacement when the desiccant reaches saturation, avoids the influence of water-containing gas on the gas pipeline, and further improves its low-temperature resistance.

[0016] 4. This utility model's hydraulic drive device for parabolic trough solar concentrators improves the intelligence, waterproof and dustproof performance, low-temperature resistance, and quick disassembly and assembly of the dust cover (without affecting other functions) of the original parabolic trough solar concentrator drive system. It can be used in harsh natural environments such as the Gobi Desert and other deserts, and can withstand temperatures as low as -40°C and excessively high UV radiation. In such environments, the device can maintain stability, high precision, and long service life, thereby achieving higher solar energy conversion efficiency and ultimately reducing power generation costs. It can be used in parabolic trough solar power plants in many parts of the country, saving costs and improving the economic benefits of parabolic trough solar thermal power generation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model (with the energy storage device assembled).

[0018] Figure 2 This is a rear view of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the present invention after the waterproof and dustproof covers have been removed.

[0020] Figure 4 for Figure 2 Enlarged view of part A;

[0021] Figure 5 This is a flow chart of the oil circuit of this utility model.

[0022] Explanation of reference numerals in the attached figures

[0023] 1-Oil tank; 2-Quick release handle; 3-Waterproof and dustproof cover; 4-Accumulator; 5-Installation space; 6-Adapter mounting plate; 7-Oil tank pressure gauge; 8-High pressure pipeline adapter; 9-Moisture-absorbing air filter unit; 10-Desiccant box; 11-Platform; 12-Motor and pump unit; 13-Return oil filter; 14-Solenoid valve terminal block; 15-High pressure pipeline; 16-Pressure sensor; 17-Valve control unit; 18-Sealing ring; 19-Upper hook plate; 20-Lower fixed bend plate; 21-Motor; 22-Gear pump; 23-Coupling; 24-Suction filter; 25-Liquid level and temperature gauge; 26- 27-Moisture-absorbing air filter; 28-One-way valve; 29-Relief valve; 30-High-pressure line one; 31-High-pressure line two; 32-First on / off ball valve; 33-First directional valve; 34-High-pressure line three; 35-Second on / off ball valve; 36-Speed ​​control valve; 37-Second directional valve; 38-High-pressure oil line branch one; 39-High-pressure oil line branch two; 40-Second balance valve; 41-First push-pull cylinder; 42-High-pressure oil line branch three; 43-High-pressure oil line branch four; 44-Third balance valve; 45-Fourth balance valve; 46-Second push-pull cylinder; 47-Third on / off ball valve; 48-Return oil line. Detailed Implementation

[0024] The present invention will now be described in more detail through specific embodiments. These embodiments are intended to provide a further understanding and explanation of the present invention, and are for descriptive purposes only, and do not constitute any limitation on the scope of protection of the present invention.

[0025] A hydraulic drive device for a trough-type solar concentrator includes a concentrator push-pull cylinder and its hydraulic drive system. The hydraulic drive system includes an oil tank 1, an accumulator 4, and a motor and pump unit 12, a valve control unit 17, and a high-pressure pipeline 15 integrated on the upper part of a platform 11. The oil tank is connected to the accumulator and the concentrator push-pull cylinder via the motor and pump unit, the high-pressure pipeline, and the valve control unit (see flowchart).

[0026] The fuel tank is a die-cast aluminum alloy tank, and its upper edge is sealed to the lower surface of the platform. A sealing ring groove is formed along the upper edge of the die-cast aluminum alloy tank, and a sealing ring 18 is embedded in this groove. The die-cast aluminum alloy tank is sealed to the platform via this sealing ring, improving the tank's sealing performance and low-temperature resistance.

[0027] A waterproof and dustproof cover 3 is installed on the upper part of the platform. The two side panels of the waterproof and dustproof cover are equipped with quick-release clips. The waterproof and dustproof cover is connected to the die-cast aluminum alloy oil tank via these quick-release clips. The quick-release clips include a quick-release handle 2, an upper hook plate 19, and a lower fixing bend plate 20. The upper hook plate is fixed to the side wall of the waterproof and dustproof cover; the lower fixing bend plate is fixed to the upper edge of the die-cast aluminum alloy oil tank. The lower part of the quick-release handle is fixed to the lower fixing bend plate, and the upper hook of the quick-release handle can be clipped to the upper hook plate. A mounting plate 6 for an adapter is fixedly installed on one side of the platform. One side panel of the waterproof and dustproof cover has an installation space 5 for engaging the mounting plate. The mounting plate does not need to be disassembled when installing or removing the waterproof and dustproof cover. The overall waterproof, snowproof, and dustproof performance of the equipment is improved. At the same time, the waterproof and dustproof cover adopts quick-release switch and aluminum alloy die-cast oil tank locking, thereby realizing rapid assembly and maintenance in harsh environments and reducing the time required for manual installation and maintenance of equipment in harsh environments.

[0028] The specific structure of the hydraulic drive system is as follows: the motor and pump unit includes a motor 21 and a gear pump 22, which are connected by a coupling 23; the inlet of the gear pump is connected to the oil tank via a suction filter 24; the oil tank is equipped with a level and temperature gauge 25 and a moisture-absorbing air filter unit 9; the outlet of the gear pump is connected to a check valve 27 and an overflow valve 28 via an oil outlet pipeline, and then connected to an overflow pipeline, which is connected to the return oil tank via a return oil filter 13; the high-pressure pipeline 29 of the gear pump outlet pipeline is connected to the accumulator 4, and the high-pressure pipeline 30 is connected to the... A first on / off ball valve 31 is connected to a first directional control valve 32; high-pressure pipeline 33 is connected to a second directional control valve 36 via a second on / off ball valve 34 and a speed control valve 35; the first directional control valve 32 is connected to a first push-pull cylinder 41 via high-pressure oil pipeline branch 1 37, high-pressure oil pipeline branch 2 38, a first balance valve 39, and a second balance valve 40; the second directional control valve 36 is connected to the second push-pull cylinder 46 via high-pressure oil pipeline branch 3 42, high-pressure oil pipeline branch 43, a third balance valve 44, and a fourth balance valve 45; the oil outlet pipeline is connected to the oil tank pressure gauge 7 and the pressure sensor 16. A third on / off ball valve 47 is installed between high-pressure pipeline 33 and the return oil pipeline 48.

[0029] The oil supply pipelines of the first balancing valve 39, the second balancing valve 40, the third balancing valve 44, and the fourth balancing valve 45 pass through the adapter mounting plate via the high-pressure pipeline adapter 8. The solenoid valve terminal 14 of the valve control unit is located on the adapter mounting plate, and the oil tank pressure gauge 7 is fixedly installed on the adapter mounting plate. When quickly installing or removing the waterproof and dustproof cover, it is not necessary to remove the high-pressure pipeline adapter, oil tank pressure gauge, and terminals, thus not affecting the normal operation of the equipment and improving the convenience of equipment installation and maintenance.

[0030] The valve control unit's wiring terminals are low-temperature resistant terminals. The moisture-absorbing air filter unit 9 includes a moisture-absorbing air filter 24 and a desiccant housing 10 mounted below it, displaying the moisture absorption status of the air filter. The saturation state of the moisture-absorbing air filter can be observed by externally viewing the desiccant color, facilitating replacement when the desiccant reaches saturation, preventing the influence of moisture-containing gases on the gas pipeline, and further improving its low-temperature resistance.

[0031] The working process of the hydraulic drive device for this trough-type solar concentrator is as follows:

[0032] a) Filling the accumulator with oil: The motor 21 starts and drives the gear pump 22 to rotate. The oil enters the accumulator 4 through the high-pressure pipeline 29. When the pressure sensor 16 detects that the system pipeline pressure reaches 250 bar, the motor stops, and the oil filling of the accumulator is completed.

[0033] b) Normal tracking mode: The pressure oil self-accumulator 4 enters the first solenoid directional valve 32 and the second solenoid directional valve 36 through the second on / off ball valve 34 (using a 2 / 2-way solenoid ball valve) and the speed control valve 35, and then enters two sets of balance valves, namely the first balance valve 39, the second balance valve 40, the third balance valve 44, and the fourth balance valve 45. Then it enters two push-pull cylinders, namely the first push-pull cylinder 41 and the second push-pull cylinder 42, which control the extension or retraction of the cylinders, thereby realizing the solar collector tracking the sun.

[0034] c) Rapid return mode: Motor 21 starts and drives gear pump 22 to rotate. By controlling the first on / off ball valve 31, the first reversing valve 32, and the second reversing valve 36, the oil flows through gear pump 22 and accumulator 4, and enters the oil cylinder through the first on / off ball valve 31. The rapid extension or retraction of the oil cylinder is controlled to realize the rapid return of the solar collector to 0°.

[0035] d) Decoking due to malfunction: In the event of a collector malfunction, the hydraulic drive can be controlled by the UPS power supply to control the first on / off ball valve 31 (using a 2 / 2-way solenoid ball valve), the first reversing valve 32, and the second reversing valve 36. Pressurized oil enters the oil cylinder from the accumulator 4 through the first on / off ball valve 31, the first reversing valve 32, and the second reversing valve 36, controlling the extension or retraction of the oil cylinder, thereby achieving a decoking of the collector by about 5 degrees.

[0036] Although the embodiments and drawings of this utility model have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of this utility model and the appended claims. Therefore, the scope of this utility model is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A hydraulic drive device for a trough-type solar concentrator, comprising a concentrator push-pull cylinder and its hydraulic drive system, the hydraulic drive system comprising an oil tank (1), an accumulator (4), and a motor and pump unit (12), a valve control unit (17), and a high-pressure pipeline (15) integrated on a platform (11), wherein the oil tank (1) is connected to the accumulator (4) and the concentrator push-pull cylinder via the motor and pump unit (12), the high-pressure pipeline (15), and the valve control unit, characterized in that: The oil tank (1) is an aluminum alloy die-cast oil tank. The upper edge of the aluminum alloy die-cast oil tank is sealed to the lower surface of the platform (11). A waterproof and dustproof cover (3) is installed on the upper part of the platform (11). The two side plates of the waterproof and dustproof cover (3) are equipped with quick-release buckles. The waterproof and dustproof cover (3) is connected to the aluminum alloy die-cast oil tank through the quick-release buckles.

2. The hydraulic drive of a trough solar concentrator according to claim 1, characterized in that: A sealing ring groove is formed along the upper edge of the aluminum alloy die-cast oil tank, and a sealing ring (18) is embedded in the sealing ring groove. The aluminum alloy die-cast oil tank is sealed and installed with the platform (11) through the sealing ring (18).

3. The hydraulic drive of a trough solar concentrator according to claim 1, characterized in that: The specific structure of the hydraulic drive system is as follows: the motor and pump unit (12) includes a motor (21) and a gear pump (22), and the motor (21) and the gear pump (22) are connected by a coupling (23); the inlet of the gear pump (22) is connected to the oil tank via an oil suction filter (24); the oil tank is equipped with a liquid level and temperature gauge (25) and a moisture-absorbing air filter unit (9); the outlet of the gear pump (22) is connected to a check valve (27) and an overflow valve (28) via an oil outlet pipeline and then connected to a return oil pipeline (48), and the return oil pipeline (48) is connected to the return oil tank via a return oil filter (13); the high-pressure pipeline (29) of the oil outlet pipeline of the gear pump (22) is connected to the accumulator (4). High pressure pipeline 2 (30) is connected to the first directional valve (32) via the first on / off ball valve (31); high pressure pipeline 3 (33) is connected to the second directional valve (36) via the second on / off ball valve (34) and the speed control valve (35); the first directional valve (32) is connected to the first push-pull cylinder (41) via high pressure oil pipeline branch 1 (37), high pressure oil pipeline branch 2 (38), the first balance valve (39), and the second balance valve (40); the second directional valve (36) is connected to the second push-pull cylinder (46) via high pressure oil pipeline branch 3 (42), high pressure oil pipeline branch 4 (43), the third balance valve (44), and the fourth balance valve (45); the oil outlet pipeline is connected to the oil tank pressure gauge (7) and the pressure sensor (16).

4. The hydraulic drive device for a trough-type solar concentrator according to claim 3, characterized in that: The platform (11) is fixedly installed with a mounting plate (6) for the adapter. The waterproof and dustproof cover (3) has an installation space (5) on one side that engages with the mounting plate (6). The mounting plate (6) does not need to be disassembled when the waterproof and dustproof cover (3) is disassembled. The high-pressure oil pipe branch 1 (37), high-pressure oil pipe branch 2 (38), high-pressure oil pipe branch 3 (42), high-pressure oil pipe branch 4 (43) and return oil pipe (48) pass through the mounting plate (6) via a high-pressure pipe adapter (8). The solenoid valve terminal (14) of the valve control unit is located on the mounting plate (6). The oil tank pressure gauge (7) is fixedly installed on the mounting plate (6).

5. The hydraulic drive of a trough solar concentrator according to claim 4, characterized in that: The valve control unit wiring terminals are low-temperature resistant terminals.

6. The hydraulic drive of a trough solar concentrator according to claim 3, characterized in that: The moisture-absorbing air filter unit (9) includes a moisture-absorbing air filter (26) and a desiccant box (10) installed at its lower part, which displays the moisture absorption status of the moisture-absorbing air filter (26).

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