Photovoltaic power generation device for water conservancy and hydropower

Abstract

The invention discloses a photovoltaic power generation device for water conservancy and hydropower, which relates to the technical field of solar power generation equipment and comprises a base, a mounting frame mounted at the top of the base, a photovoltaic panel mounted at the top of the mounting frame, an electrical cabinet mounted on one side of the mounting frame, and a solar controller, a storage battery and an inverter which are mounted in the electrical cabinet, a rotating plate is fixedly connected to the bottom of the mounting frame, a driving motor is mounted at the bottom of the base, and an output shaft of the driving motor vertically and upwards penetrates through the base to be fixedly connected with the bottom of the rotating plate; a radio remote control module is installed in the electrical cabinet and electrically connected with the driving motor so as to control starting and stopping of the driving motor. The power generation efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of solar power generation equipment, and in particular to a photovoltaic power generation device for water conservancy and hydropower. Background Art

[0002] Photovoltaic power generation is a technology that uses the photovoltaic effect of semiconductor materials to directly convert solar energy into electricity. Its core component is the photovoltaic cell. Since the development of the first practical silicon-based photovoltaic cell by Bell Laboratories in the United States in 1954, photovoltaic technology has experienced a leap forward, from space applications to ground-based power stations.

[0003] The photovoltaic power generation device for water conservancy and hydropower in the related art generally includes a base, a mounting frame installed on the top of the base, a photovoltaic panel installed on the top of the mounting frame, an electrical cabinet installed on one side of the mounting frame, and a solar controller, battery and inverter installed in the electrical cabinet.

[0004] However, photovoltaic panels in existing technologies are often fixed, and the sun rises in the east and sets in the west, which will affect the reception of sunlight and thus affect the power generation efficiency. Summary of the Invention

[0005] This application provides a photovoltaic power generation device for water conservancy and hydropower, which can improve power generation efficiency and adopts the following technical solutions: A photovoltaic power generation device for water conservancy and hydropower, comprising a base, a mounting frame installed on the top of the base, a photovoltaic panel installed on the top of the mounting frame, an electrical cabinet installed on one side of the mounting frame, and a solar controller, a battery and an inverter installed in the electrical cabinet. A rotating plate is fixedly connected to the bottom of the mounting frame, a drive motor is installed at the bottom of the base, and the output shaft of the drive motor vertically upward passes through the base and is fixedly connected to the bottom of the rotating plate; a radio remote control module is installed in the electrical cabinet, and the radio remote control module is electrically connected to the drive motor for controlling the opening and closing of the drive motor.

[0006] Preferably, a flushing mechanism for cleaning the surface of the photovoltaic panel is installed on the top of the electrical cabinet.

[0007] Preferably, the flushing mechanism includes a rainwater tank installed on the top of the electrical cabinet and a flushing pipe connected to the bottom of the rainwater tank; the flushing pipe is arranged at one end away from the rainwater tank toward the surface of the photovoltaic panel; the top of the rainwater tank is fixedly connected to a water guide frame, the inner wall of the rainwater tank is fixedly connected to a first filter plate and a fixed plate, the fixing plate is provided with a first through hole, a water blocking elastic plate is slidably connected in the first through hole, a plurality of support plates are fixedly connected to the bottom of the fixing plate, each of the support plates is fixedly connected to the water blocking elastic plate, a second through hole is provided at the bottom of the rainwater tank, a sealing ring is fixedly connected in the second through hole, a connecting rod is slidably connected in the sealing ring, the top of the connecting rod is fixedly connected to the bottom of the water blocking elastic plate, the bottom of the connecting rod is fixedly connected to a supporting plate, the inner wall of the electrical cabinet is fixedly connected to an electric push rod, the output end of the electric push rod is fixedly connected to a push plate, and the push plate can push the supporting plate to move downward.

[0008] Preferably, a scraping mechanism for scraping the surface of the photovoltaic panel is installed on the side wall of the mounting frame.

[0009] Preferably, the scraping mechanism includes a first screw rotatably mounted on the side wall of the mounting frame and a first guide rod fixedly connected to the side wall of the mounting frame; a servo motor is installed in the electrical cabinet, one end of the first screw is fixedly connected to the output shaft of the servo motor, a movable frame is threadedly connected to the first screw, the movable frame is slidably connected to the first guide rod, the top of the movable frame is vertically slidably connected to the movable rod, the two ends of the movable rod are respectively fixed with a scraper and a cross plate, the side walls of the scraper are provided with an inclined surface so that the bottom of the scraper forms an edge; the bottom of the cross plate is fixed with a first vertical spring, and the end of the first vertical spring away from the cross plate is fixed to the top of the movable frame.

[0010] Preferably, a driving block is fixedly connected to the side wall of the mounting frame, and the inclined surface matches the side wall of the driving block.

[0011] Preferably, a third through hole and a fourth through hole are provided on the side wall of the electrical cabinet, a second filter plate is installed in the third through hole, and a cooling fan is installed in the fourth through hole; a recoil mechanism for recoiling the second filter plate is installed in the electrical cabinet.

[0012] Preferably, the recoil mechanism includes a recoil frame installed on the inner wall of the electrical cabinet, a sleeve fixed to the bottom of the recoil frame, a vertical rod connected to the sleeve along a vertical sliding motion, a piston plate fixed to the bottom of the vertical rod, and a horizontal plate fixed to the top of the vertical rod; a pressure relief valve is installed in the sleeve, and the piston plate is sealingly and slidingly connected to the inner wall of the sleeve to form a strong air pressure between the piston plate and the pressure relief valve; a trumpet is fixed to the bottom of the sleeve, and the trumpet is arranged at one end away from the sleeve toward the second filter plate; the supporting plate can drive the horizontal plate to move downward, and a plurality of second vertical springs are fixed between the horizontal plate and the recoil frame.

[0013] Preferably, the electrical cabinet is provided with a dust brushing mechanism for brushing dust on the bottom of the second filter plate.

[0014] Preferably, the dust brushing mechanism includes a second lead screw rotatably connected to the bottom of the electrical cabinet and a second guide rod fixedly connected to the bottom of the electrical cabinet; a cleaning plate is threadedly connected to the second lead screw, and the cleaning plate is slidably connected to the second guide rod, and a brush is fixedly connected to the top of the cleaning plate, and the brush can brush dust from the bottom of the second filter plate; a gear is fixedly connected to one end of the second lead screw, and a rack is fixedly connected to the bottom of the supporting plate, and a fifth through hole for the rack to slide is provided at the bottom of the electrical cabinet, and the gear is meshed with the rack.

[0015] To sum up, the present application has the following beneficial effects: when the facing direction of the photovoltaic panel needs to be adjusted, the drive motor is first remotely started through the radio remote control module, and then the output shaft of the drive motor drives the rotating plate to rotate. The rotation of the rotating plate can adjust the facing direction of the photovoltaic panel, thereby improving the power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application.

[0017] Figure 2 This is a structural diagram highlighting the scraping mechanism in the embodiment of the present application.

[0018] Figure 3 This is a structural diagram highlighting the flushing mechanism in an embodiment of the present application.

[0019] Figure 4 This is a structural diagram highlighting the recoil mechanism and the dust brushing mechanism in the embodiment of the present application.

[0020] Explanation of reference numerals: 1. base; 11. drive motor; 2. mounting frame; 21. photovoltaic panel; 22. electrical cabinet; 221. third through hole; 222. second filter plate; 223. fourth through hole; 224. cooling fan; 23. solar controller; 24. battery; 25. inverter; 26. rotating plate; 27. radio remote control module; 3. flushing mechanism; 31. rainwater tank; 311. water guide frame; 312. second through hole; 313. sealing ring; 32. flushing pipe; 33. first filter plate; 34. fixing plate; 341. support plate; 342. first through hole; 343. water blocking elastic plate; 344. support spring; 35. connection Rod; 36, load-bearing plate; 37, electric push rod; 38, push plate; 4, scraping mechanism; 41, first lead screw; 42, first guide rod; 43, servo motor; 44, moving frame; 45, moving rod; 46, scraper; 461, inclined plane; 47, horizontal plate; 48, first vertical spring; 49, driving block; 5, recoil mechanism; 51, recoil frame; 52, sleeve; 53, vertical rod; 54, piston plate; 55, horizontal plate; 56, pressure relief valve; 57, trumpet; 58, second vertical spring; 6, dust brushing mechanism; 61, second lead screw; 62, second guide rod; 63, cleaning plate; 64, brush; 65, gear; 66, rack; 67, fifth through hole. DETAILED DESCRIPTION

[0021] Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0022] This application discloses a photovoltaic power generation device for water conservancy and hydropower, such as Figure 1 and Figure 2 As shown, it includes a base 1, a mounting frame 2 mounted on the top of the base 1, a photovoltaic panel 21 installed obliquely on the top of the mounting frame 2, an electrical cabinet 22 mounted on one side of the mounting frame 2, and a solar controller 23, a battery 24, and an inverter 25 installed in the electrical cabinet 22. A rotating plate 26 is fixedly connected to the bottom of the mounting frame 2, and a drive motor 11 is mounted on the bottom of the base 1. The output shaft of the drive motor 11 vertically passes through the base 1 and is fixedly connected to the bottom of the rotating plate 26. A radio remote control module 27 is installed in the electrical cabinet 22. The radio remote control module 27 is electrically connected to the drive motor 11 for controlling the opening and closing of the drive motor 11. When the direction of the photovoltaic panel 21 needs to be adjusted, the drive motor 11 is first remotely started through the radio remote control module 27. Then, the output shaft of the drive motor 11 drives the rotating plate 26 to rotate. The rotation of the rotating plate 26 can adjust the direction of the photovoltaic panel 21, thereby improving the power generation efficiency.

[0023] like Figure 2 and Figure 3 As shown, a flushing mechanism 3 for cleaning the surface of the photovoltaic panel 21 is installed on the top of the electrical cabinet 22, and the flushing mechanism 3 includes a rainwater tank 31 vertically installed on the top of the electrical cabinet 22 and a flushing pipe 32 connected to the bottom of the rainwater tank 31; the flushing pipe 32 is arranged at one end away from the rainwater tank 31 toward the surface of the photovoltaic panel 21; a water guide frame 311 is fixedly connected to the top of the rainwater tank 31, and the opening of the water guide frame 311 is outwardly extended, and the inner wall of the rainwater tank 31 is horizontally fixed with a first filter plate 33 and a fixing plate 34, and a first through hole 342 is opened in the fixing plate 34, and a water blocking elastic plate 3 is vertically slidably connected in the first through hole 342. 43. A plurality of support plates 341 are horizontally fixed to the bottom of the fixed plate 34, and a support spring 344 is vertically fixed between each support plate 341 and the water-blocking elastic plate 343. A second through hole 312 is provided at the bottom of the rainwater tank 31, and a sealing ring 313 is fixed in the second through hole 312. A connecting rod 35 is vertically slidably connected in the sealing ring 313, and the top of the connecting rod 35 is fixed to the bottom of the water-blocking elastic plate 343. The bottom of the connecting rod 35 is fixed to a bearing plate 36. An electric push rod 37 is vertically fixed to the inner wall of the electrical cabinet 22, and a push plate 38 is fixed to the output end of the electric push rod 37. The push plate 38 can push the bearing plate 36 to move downward. When a lot of rainwater gathers between the water-blocking elastic plate 343 and the filter plate, the electric push rod 37 is started first, and then the output end of the electric push rod 37 drives the push plate 38 to move downward, and the push plate 38 moves downward to drive the supporting plate 36 to move downward, and the supporting plate 36 moves downward to drive the connecting rod 35 to move downward, and the connecting rod 35 moves downward to drive the water-blocking elastic plate 343 to move downward. The downward movement of the water-blocking elastic plate 343 can enable the water flow to flow quickly from the first through hole 342 to the flushing pipe 32, and then the surface of the photovoltaic panel 21 can be strongly flushed, thereby facilitating the cleaning of the surface of the photovoltaic panel 21; in summary, the flushing mechanism 3 set up is convenient for effectively flushing the surface of the photovoltaic panel 21.

[0024] like Figure 1 and Figure 2As shown, the side wall of the mounting frame 2 is installed with a scraping mechanism 4 for scraping the surface of the photovoltaic panel 21. The scraping mechanism 4 includes a first screw 41 rotatably mounted on the side wall of the mounting frame 2 through a bearing and a first guide rod 42 fixedly connected to the side wall of the mounting frame 2; a servo motor 43 is installed in the electrical cabinet 22, one end of the first screw 41 is fixedly connected to the output shaft of the servo motor 43, a movable frame 44 is threadedly connected to the first screw 41, the first guide rod 42 is arranged to penetrate the movable frame 44, and the movable frame 44 is slidably connected to the first guide rod 42. A guide rod 42 is provided, and a moving rod 45 is connected to the top of the moving frame 44 for vertical sliding movement. The moving rod 45 passes through the top of the moving frame 44. A scraper 46 and a cross plate 47 are fixedly connected at both ends of the moving rod 45. The side wall of the scraper 46 is provided with an inclined surface 461 so that the bottom of the scraper 46 forms an edge, which facilitates the effective scraping of the surface of the photovoltaic panel 21. A first vertical spring 48 is fixedly connected to the bottom of the cross plate 47. The end of the first vertical spring 48 away from the cross plate 47 is fixedly connected to the top of the moving frame 44. When it is necessary to clean the adhesive on the surface of the photovoltaic panel 21, the servo motor 43 is first started. At this time, the output shaft of the servo motor 43 drives the first screw 41 to rotate. The rotation of the first screw 41 drives the moving frame 44 to move. The movement of the moving frame 44 drives the scraper 46 to move, so that the adhesive on the surface of the photovoltaic panel 21 can be cleaned. In summary, the scraping mechanism 4 is provided to facilitate the cleaning of the adhesive on the surface of the photovoltaic panel 21. In addition, the first vertical spring 48 is provided, and when the height of the adhesive on the surface of the photovoltaic panel 21 is high, the scraper 46 can be driven to move upward under the action of the inclined surface 461, thereby reducing damage to the scraper 46.

[0025] like Figure 1 and Figure 2 As shown, a camera (not shown) is mounted on the mounting frame 2 and is electrically connected to the radio remote control module 27. A driver block 49 is vertically fixed to the side wall of the mounting frame 2. The width and length of the driver block 49 are significantly smaller than those of the photovoltaic panel 21, and the inclined surface 461 matches the side wall of the driver block 49. When the scraper 46 blocks rainwater from flowing downward from the photovoltaic panel 21, the first lead screw 41 continues to drive the scraper 46 downward. At this time, the driver block 49, under the action of the inclined surface 461, can drive the scraper 46 to separate from the surface of the photovoltaic panel 21, thereby reducing the obstruction of rainwater.

[0026] like Figure 2 and Figure 3As shown, the side wall of the electrical cabinet 22 is provided with a third through hole 221 and a fourth through hole 223. A second filter plate 222 is mounted in the third through hole 221, and a cooling fan 224 is mounted in the fourth through hole 223. A recoil mechanism 5 is installed in the electrical cabinet 22 for recoiling the second filter plate 222. The cooling fan 224 facilitates cooling the interior of the electrical cabinet 22. The second filter plate 222 reduces the ingress of debris into the electrical cabinet 22, and the recoil mechanism 5 facilitates cleaning of the second filter plate 222.

[0027] like Figure 3 and Figure 4 As shown, the recoil mechanism 5 includes a recoil frame 51 installed on the inner wall of the electrical cabinet 22, a sleeve 52 vertically fixed to the bottom of the recoil frame 51, a vertical rod 53 slidingly connected to the sleeve 52, a piston plate 54 fixed to the bottom of the vertical rod 53, and a horizontal plate 55 horizontally fixed to the top of the vertical rod 53; a pressure relief valve 56 is installed in the sleeve 52, and the piston plate 54 is sealingly and slidingly connected to the inner wall of the sleeve 52 so that a strong air pressure is formed between the piston plate 54 and the pressure relief valve 56, which can push open the pressure relief valve 56; a trumpet 57 is fixed to the bottom of the sleeve 52, and the end of the trumpet 57 away from the sleeve 52 is arranged toward the second filter plate 222; the supporting plate 36 can drive the horizontal plate 55 to move downward, and a plurality of second vertical springs 58 are vertically fixed between the horizontal plate 55 and the recoil frame 51. The supporting plate 36 moves downward to drive the horizontal plate 55 to move downward, the horizontal plate 55 moves downward to drive the vertical rod 53 to move downward, the vertical rod 53 moves downward to drive the piston plate 54 to move downward, and the downward movement of the piston plate 54 can form a strong air pressure between the piston plate 54 and the pressure relief valve 56, and then push open the pressure relief valve 56, and then under the action of the bell tube 57, the second filter plate 222 can be recoiled; in summary, the recoil mechanism 5 set up facilitates the recoil of the second filter plate 222.

[0028] like Figure 3 and Figure 4As shown, a dust brushing mechanism 6 for brushing dust on the bottom of the second filter plate 222 is installed on the electrical cabinet 22, and the dust brushing mechanism 6 includes a second lead screw 61 horizontally connected to the bottom of the electrical cabinet 22 by a bearing and a second guide rod 62 horizontally fixed to the bottom of the electrical cabinet 22; a cleaning plate 63 is threadedly connected to the second lead screw 61, and the cleaning plate 63 is slidably connected to the second guide rod 62, and the second guide rod 62 passes through the cleaning plate 63. A brush 64 is fixed to the top of the cleaning plate 63, and the brush 64 can brush dust on the bottom of the second filter plate 222; a gear 65 is fixed to one end of the second lead screw 61, and a rack 66 is fixed to the bottom of the supporting plate 36. A fifth through hole 67 for the rack 66 to slide vertically is provided at the bottom of the electrical cabinet 22, and the gear 65 is meshed with the rack 66. When the supporting plate 36 moves, it drives the rack 66 to move, the rack 66 moves to drive the gear 65 to rotate, the gear 65 rotates to drive the second screw 61 to rotate, the second screw 61 rotates to drive the cleaning plate 63 to move, the cleaning plate 63 moves to drive the brush 64 to move, and the brush 64 moves to brush the bottom of the second filter plate 222; in summary, the dust brushing mechanism 6 is set to facilitate brushing the bottom of the second filter plate 222.

[0029] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A photovoltaic power generation device for water conservancy and hydropower, comprising a base (1), a mounting frame (2) mounted on the top of the base (1), a photovoltaic panel (21) mounted on the top of the mounting frame (2), an electrical cabinet (22) mounted on one side of the mounting frame (2), and a solar controller (23), a battery (24), and an inverter (25) mounted in the electrical cabinet (22), characterized in that: A rotating plate (26) is fixedly connected to the bottom of the mounting frame (2); a driving motor (11) is installed at the bottom of the base (1); an output shaft of the driving motor (11) vertically passes through the base (1) and is fixedly connected to the bottom of the rotating plate (26); a radio remote control module (27) is installed in the electrical cabinet (22); the radio remote control module (27) is electrically connected to the driving motor (11) for controlling the opening and closing of the driving motor (11).

2. A photovoltaic power generation device for water conservancy and hydropower according to claim 1, characterized in that: A flushing mechanism (3) for cleaning the surface of the photovoltaic panel (21) is installed on the top of the electrical cabinet (22).

3. A photovoltaic power generation device for water conservancy and hydropower according to claim 2, characterized in that: The flushing mechanism (3) comprises a rainwater tank (31) mounted on the top of the electrical cabinet (22) and a flushing pipe (32) connected to the bottom of the rainwater tank (31); one end of the flushing pipe (32) away from the rainwater tank (31) is arranged toward the surface of the photovoltaic panel (21); a water guide frame (311) is fixedly connected to the top of the rainwater tank (31); a first filter plate (33) and a fixing plate (34) are fixedly connected to the inner wall of the rainwater tank (31); a first through hole (342) is provided in the fixing plate (34); a water blocking elastic plate (343) is slidably connected in the first through hole (342); a plurality of support plates (341) are fixedly connected to the bottom of the fixing plate (34), each of which is provided with a plurality of support plates (341). A support spring (344) is fixedly connected between the support plate (341) and the water blocking elastic plate (343); a second through hole (312) is opened at the bottom of the rainwater tank (31); a sealing ring (313) is fixedly connected in the second through hole (312); a connecting rod (35) is slidably connected in the sealing ring (313); the top of the connecting rod (35) is fixedly connected to the bottom of the water blocking elastic plate (343); the bottom of the connecting rod (35) is fixedly connected to a bearing plate (36); an electric push rod (37) is fixedly connected to the inner wall of the electrical cabinet (22); the output end of the electric push rod (37) is fixedly connected to a push plate (38); the push plate (38) can push the bearing plate (36) to move downward.

4. The photovoltaic power generation device for water conservancy and hydropower according to claim 1, characterized in that: A scraping mechanism (4) for scraping the surface of the photovoltaic panel (21) is installed on the side wall of the mounting frame (2).

5. The photovoltaic power generation device for water conservancy and hydropower according to claim 4, characterized in that: The scraping mechanism (4) comprises a first lead screw (41) rotatably mounted on the side wall of the mounting frame (2) and a first guide rod (42) fixedly connected to the side wall of the mounting frame (2); a servo motor (43) is installed in the electrical cabinet (22), one end of the first lead screw (41) is fixedly connected to the output shaft of the servo motor (43), a movable frame (44) is threadedly connected to the first lead screw (41), and the movable frame (44) is slidably connected to the first guide rod (42). The top of the movable frame (44) is connected to a movable rod (45) in a vertical sliding manner. The two ends of the movable rod (45) are respectively fixed with a scraper (46) and a horizontal plate (47). The side wall of the scraper (46) is provided with an inclined surface (461) so that the bottom of the scraper (46) forms an edge. The bottom of the horizontal plate (47) is fixed with a first vertical spring (48). The end of the first vertical spring (48) away from the horizontal plate (47) is fixed to the top of the movable frame (44).

6. The photovoltaic power generation device for water conservancy and hydropower according to claim 5, characterized in that: A driving block (49) is fixedly connected to the side wall of the mounting frame (2), and the inclined surface (461) matches the side wall of the driving block (49).

7. The photovoltaic power generation device for water conservancy and hydropower according to claim 3, characterized in that: A third through hole (221) and a fourth through hole (223) are provided on the side wall of the electrical cabinet (22); a second filter plate (222) is installed in the third through hole (221), and a cooling fan (224) is installed in the fourth through hole (223); and a recoil mechanism (5) for recoiling the second filter plate (222) is installed in the electrical cabinet (22).

8. The photovoltaic power generation device for water conservancy and hydropower according to claim 7, characterized in that: The recoil mechanism (5) comprises a recoil frame (51) mounted on the inner wall of the electrical cabinet (22), a sleeve (52) fixed to the bottom of the recoil frame (51), a vertical rod (53) connected to the sleeve (52) in a vertical sliding manner, a piston plate (54) fixed to the bottom of the vertical rod (53), and a horizontal plate (55) fixed to the top of the vertical rod (53); a pressure relief valve (56) is installed in the sleeve (52), and the piston plate (54) is sealingly and slidingly connected to the sleeve (52) so that a strong air pressure is formed between the piston plate (54) and the pressure relief valve (56); a bell tube (57) is fixedly connected to the bottom of the sleeve (52), and the bell tube (57) is arranged at one end away from the sleeve (52) toward the second filter plate (222); the supporting plate (36) can drive the horizontal plate (55) to move downward, and a plurality of second vertical springs (58) are fixedly connected between the horizontal plate (55) and the recoil frame (51).

9. The photovoltaic power generation device for water conservancy and hydropower according to claim 3, characterized in that: The electrical cabinet (22) is provided with a dust brushing mechanism (6) for brushing dust on the bottom of the second filter plate (222).

10. The photovoltaic power generation device for water conservancy and hydropower according to claim 9, characterized in that: The dust brushing mechanism (6) comprises a second lead screw (61) rotatably connected to the bottom of the electrical cabinet (22) and a second guide rod (62) fixed to the bottom of the electrical cabinet (22); a cleaning plate (63) is threadedly connected to the second lead screw (61), the cleaning plate (63) is slidably connected to the second guide rod (62), a brush (64) is fixed to the top of the cleaning plate (63), and the brush (64) can brush dust from the bottom of the second filter plate (222); a gear (65) is fixed to one end of the second lead screw (61), a rack (66) is fixed to the bottom of the bearing plate (36), a fifth through hole (67) for the rack (66) to slide is provided at the bottom of the electrical cabinet (22), and the gear (65) is meshed with the rack (66).

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