High-voltage switch cabinet

Abstract

The invention relates to the technical field of high-voltage switch cabinets, in particular to a high-voltage switch cabinet which comprises a switch cabinet body, a mounting seat is fixedly connected to the lower side of the switch cabinet body, a motor seat is fixedly connected to the top surface of the switch cabinet body, a surrounding frame is rotatably connected to the motor seat, and an annular frame is fixedly connected to the surrounding frame. A mounting frame is movably clamped to the bottom end of the surrounding frame, a transmission mechanism is rotatably connected to the interior of the mounting frame, a guide plate is arranged on one side of the mounting frame in a sliding fit mode, and a sand sweeping mechanism is rotatably connected to one side of the guide plate. And meanwhile, under the driving of the transmission mechanism, the sand sweeping roller starts to rotate, and the sand is further cleaned after the sand is pushed away by the sand guide plate, so that the sand is prevented from blocking a heat dissipation opening of equipment or entering an electrical part, the failure rate of the equipment is reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage switch cabinets, and in particular to a high-voltage switch cabinet. Background Art

[0002] High-voltage switchgear is a device used to control, protect, isolate, and monitor high-voltage electrical equipment in power systems. Its primary function is to control and protect electrical equipment within the power system, ensuring safe, stable, and reliable system operation. High-voltage switchgear is commonly used in high-voltage transmission, distribution, and industrial power systems, and is commonly used in substations, power plants, and distribution rooms.

[0003] Prior art publication CN119482120A provides a high-voltage switchgear cabinet. If resistance to the trolley's movement is encountered during the outward movement of the trolley driven by a propulsion assembly, a locking assembly can be used to unidirectionally lock the screw, preventing further damage to the trolley. A buffer assembly can also be used to allow relative rotation between the rotating member and the screw, preventing the trolley from suddenly stopping and causing injury to the operator. The screw has two threads with different pitches, allowing the trolley to move faster in the first half of its travel near the cabinet door, improving the efficiency of pushing and ejecting the trolley. Meanwhile, the trolley moves slower in the second half of its travel near the stationary contact, allowing for better control of the trolley and reducing the possibility of collision between the moving and stationary contacts.

[0004] However, when used in desert environments, existing technologies can be prone to strong winds and sand, which can blow large amounts of sand and dust around the equipment, causing it to accumulate around the cabinet. Because existing technologies lack a method for dealing with sand accumulation around the cabinet, the accumulated sand can easily clog vents and heat dissipation holes, affecting air circulation within the cabinet. This can cause the temperature inside the cabinet to rise, potentially exceeding the equipment's designed operating temperature range, leading to overheating and even damage to electrical components.

[0005] In summary, the existing technology lacks sand cleaning technology for high-voltage switchgear used in desert environments. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a high-voltage switch cabinet.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a high-voltage switchgear, comprising a switchgear main body, a mounting seat fixedly connected to the lower side of the switchgear main body, a motor seat fixedly connected to the top surface of the switchgear main body, a surrounding frame rotatably connected to the motor seat, a ring frame fixedly connected to the surrounding frame, a mounting frame movably connected to the bottom end of the surrounding frame, a transmission mechanism rotatably connected to the mounting frame, a guide plate slidably fitted on one side of the mounting frame, and a sand sweeping mechanism rotatably connected to one side of the guide plate.

[0008] Preferably, a protective cover is provided on the outer side of the motor base for sliding cooperation, a limit handle is provided on one side of the protective cover for sliding cooperation, the inner end of the limit handle is provided for movable contact with the top surface of the motor base, and two limit rods are fixedly connected on the other side of the protective cover, the limit rods are provided in a T-shaped structure, the limit rods are provided for sliding cooperation with the inner wall of the motor base, a tension spring is fixedly provided on the limit rod, and the other end of the tension spring is fixedly connected to the inner wall of the motor base.

[0009] Preferably, a motor is fixedly connected to one end of the surrounding frame connected to the motor seat, and the motor is fixedly connected to the inner wall of the motor seat. A rotating shaft is rotatably connected to the inner wall of one end of the surrounding frame. The top end of the rotating shaft passes through the outer wall of the annular frame and extends to the inside and is fixedly connected to a transmission wheel A. The bottom end of the rotating shaft passes through the inner wall of the surrounding frame and extends to the outside and is fixedly connected to a transmission rod. Snap-in grooves are provided on both sides of the bottom end of the surrounding frame.

[0010] Preferably, a fixed frame is rotatably connected to one side of the annular frame, the fixed frame is fixedly connected to the motor seat, an annular rack is fixedly connected to the fixed frame, and the annular rack is meshed with the transmission wheel A for transmission.

[0011] Preferably, the inner walls on both sides of the upper end of the mounting frame are slidably fitted with clamping blocks, the outer ends of the clamping blocks are movably clamped with the inner walls of the clamping grooves, the inner ends of the clamping blocks are fixedly connected with spring A, the other end of the spring A is fixedly connected with the inner wall of the mounting frame, the openings at both ends of the mounting frame are rotatably connected with gear rings, the inner ends of the clamping blocks are fixedly connected with pull rings, and the pull rings are slidably fitted through the inner wall of the mounting frame.

[0012] Preferably, the transmission mechanism includes a universal joint A, the two ends of which are rotatably connected to the inner wall of the mounting frame, and a connecting sleeve is fixedly connected to the top of the universal joint A. The top of the connecting sleeve is a concave structure, and the connecting sleeve is slidingly matched with the outer wall of the transmission rod.

[0013] Preferably, a transmission wheel B is fixedly connected to the bottom end of the universal joint A, a gear shaft is meshingly provided on the lower side of the transmission wheel B, the gear shaft is slidingly fitted with a gear ring, a driving wheel is fixedly connected to the outer end of one side of the gear shaft, and one end of the gear shaft connected to the driving wheel is rotatably connected to the guide plate.

[0014] Preferably, one side of the guide plate is arranged in sliding contact with the lower outer wall of the switch cabinet body, and one side of the guide plate is fixedly connected with a sand guide plate in an inclined structure. Two guide rods are fixedly connected to the guide plate, and the guide rods are slidingly matched with the mounting frame. A plurality of springs B are fixedly connected to one side of the guide plate, and the other end of the spring B is fixedly connected to the mounting frame.

[0015] Preferably, the sand sweeping mechanism includes a universal joint B, the two ends of the universal joint B are respectively rotatably connected to the guide plate and the sand guide plate, the bottom end of the universal joint B is fixedly connected to a sand sweeping roller, the bristles on the outside of the sand sweeping roller are in sliding contact with the lower outer wall of the switch cabinet body, and the top end of the universal joint B is fixedly connected to a driven wheel, and the driven wheel is meshed with the driving wheel for transmission.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up sand guide plates, when the surrounding frame rotates around the switch cabinet body installed in the desert, the sand guide plates will be driven to rotate synchronously, pushing away the sand accumulated around the switch cabinet body. At the same time, driven by the transmission mechanism, the sand sweeping roller starts to rotate, and further cleans the sand after the sand guide plates push away the sand, preventing sand and dust from clogging the equipment's heat dissipation ports or entering the electrical parts, thereby reducing equipment failure rate and extending service life.

[0018] 2. The mounting frame adopts a detachable design. The device can be disassembled during transportation to reduce the volume and facilitate handling and storage. In desert environments, the disassembly and assembly of the equipment can reduce the difficulty of transportation and save costs. In addition, a rotatable gear ring is set in the mounting frame to block the entry of sand and dust, ensure the accurate engagement of the transmission system, and avoid transmission failures caused by sand interference.

[0019] 3. The sliding protective cover installed on the motor base can effectively isolate sand and dust and prevent sand from entering the interior of the motor base. In harsh environments such as deserts or sandstorms, it can greatly reduce the damage of sand and dust to the motor, ensure the long-term stable operation of the motor, and facilitate maintenance. The setting of the ring frame can prevent sand from accumulating on the ring rack and reduce the wear of the ring rack and transmission wheel A by sand and dust, effectively protecting the motor and transmission system, ensuring its normal operation and stability, which not only improves the working efficiency and reliability of the equipment, but also reduces maintenance costs, enabling the equipment to adapt to extreme deserts or high dust environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front side of the overall structure of a high-voltage switchgear according to the present invention;

[0021] Figure 2 This is a schematic diagram of the rear side of the overall structure of a high-voltage switchgear according to the present invention;

[0022] Figure 3 This is a partial cross-sectional expanded schematic diagram of a motor base structure of a high-voltage switchgear according to the present invention;

[0023] Figure 4 A partial cross-sectional schematic diagram of a surrounding frame structure of a high-voltage switchgear cabinet according to the present invention;

[0024] Figure 5 It is a partial cross-sectional schematic diagram of a ring frame structure of a high-voltage switchgear according to the present invention;

[0025] Figure 6 This is a schematic cross-sectional view of a mounting frame structure of a high-voltage switchgear cabinet according to the present invention;

[0026] Figure 7 This is a schematic structural diagram of a transmission mechanism of a high-voltage switchgear according to the present invention;

[0027] Figure 8 This is a structural schematic diagram of a guide plate and a sand sweeping mechanism of a high-voltage switchgear cabinet according to the present invention;

[0028] The following are marked in the figure: 1. Switchgear body; 2. Mounting base; 3. Motor base; 4. Surrounding frame; 5. Ring frame; 6. Mounting frame; 7. Transmission mechanism; 8. Guide plate; 9. Sand sweeping mechanism; 301. Protective cover; 302. Limit handle; 303. Limit rod; 304. Tension spring; 401. Motor; 402. Rotating shaft; 403. Transmission wheel A; 404. Transmission rod; 405. Snap-in slot; 501, fixed frame; 502, annular rack; 601, clamping block; 602, spring A; 603, gear ring; 604, pull ring; 701, universal joint A; 702, connecting sleeve; 703, transmission wheel B; 704, gear shaft; 705, driving wheel; 801, guide rod; 802, spring B; 803, sand guide plate; 901, universal joint B; 902, sand sweeping roller; 903, driven wheel. DETAILED DESCRIPTION

[0029] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0030] like Figures 1-8The high-voltage switchgear shown in the figure includes a switchgear body 1, a mounting base 2 is fixedly connected to the lower side of the switchgear body 1, a motor base 3 is fixedly connected to the top surface of the switchgear body 1, a surrounding frame 4 is rotatably connected to the motor base 3, a ring frame 5 is fixedly connected to the surrounding frame 4, a mounting frame 6 is movably connected to the bottom end of the surrounding frame 4, a transmission mechanism 7 is rotatably connected to the mounting frame 6, a guide plate 8 is slidably provided on one side of the mounting frame 6, and a sand sweeping mechanism 9 is rotatably provided on one side of the guide plate 8.

[0031] like Figure 3 As shown, a protective cover 301 is slidably mounted on the outside of the motor base 3. A limit handle 302 is slidably mounted on one side of the protective cover 301. The inner end of the limit handle 302 is movably mounted on the top surface of the motor base 3. Two limit rods 303 are fixedly mounted on the other side of the protective cover 301. The limit rods 303 are arranged in a T-shaped structure and slidably mount on the inner wall of the motor base 3. A tension spring 304 is fixedly mounted on the limit rods 303. The other end of the tension spring 304 is fixedly mounted on the inner wall of the motor base 3. Holding the limit handle 302, the protective cover 301 is pushed upward. Then, when the limit handle 302 is higher than the motor base 3, the limit handle 302 is pushed to move the limit handle 302 onto the motor base 3. At this time, the protective cover 301 can be kept open, making it easier to inspect the motor 401. After the inspection is completed, the limit handle 302 is pulled outward. At this time, the tension spring 304 automatically closes the protective cover 301.

[0032] like Figure 4 As shown, a motor 401 is fixedly connected to one end of the surrounding frame 4 connected to the motor base 3, and the motor 401 is fixedly connected to the inner wall of the motor base 3. A rotating shaft 402 is rotatably connected to the inner wall of one end of the surrounding frame 4. The top end of the rotating shaft 402 passes through the outer wall of the annular frame 5 to extend to the inside and is fixedly connected to a transmission wheel A403. The bottom end of the rotating shaft 402 passes through the inner wall of the surrounding frame 4 to extend to the outside and is fixedly connected to a transmission rod 404. A clamping groove 405 is provided on both sides of the bottom end of the surrounding frame 4.

[0033] like Figure 5 As shown, a fixed frame 501 is rotatably connected to one side of the annular frame 5, and the fixed frame 501 is fixedly connected to the motor base 3. An annular rack 502 is fixedly connected to the fixed frame 501, and the annular rack 502 is meshed with the transmission wheel A403 for transmission.

[0034] like Figure 6As shown, a clamping block 601 is provided on the inner wall of both sides of the upper end of the mounting frame 6 in a sliding manner. The outer end of the clamping block 601 is movably engaged with the inner wall of the engaging groove 405. A spring A602 is fixedly connected to the inner end of the clamping block 601. The other end of the spring A602 is fixedly connected to the inner wall of the mounting frame 6. A gear ring 603 is rotatably connected at the openings at both ends of the mounting frame 6. A pull ring 604 is fixedly connected to the inner end of the clamping block 601. The pull ring 604 is slidably engaged with the inner wall of the mounting frame 6. The top end of the mounting frame 6 is aligned with the bottom end of the surrounding frame 4, so that the connecting sleeve 702 is plugged into the transmission plug rod 404. Then, under the action of the spring A602, the clamping block 601 is inserted into the engaging groove 405 to achieve the installation and fixation of the mounting frame 6.

[0035] like Figure 7 As shown, the transmission mechanism 7 includes a universal joint A701, the ends of which are rotatably connected to the inner wall of the mounting frame 6. A connecting sleeve 702 is fixedly connected to the top of the universal joint A701. The top of the connecting sleeve 702 is a concave structure, and the connecting sleeve 702 is slidably engaged with the outer wall of the transmission plug rod 404. Under the action of the annular rack 502, the meshed transmission wheel A403 rotates, which in turn drives the connected rotating shaft 402 to rotate, which in turn drives the transmission plug rod 404 to rotate, which in turn drives the universal joint A701 connected to the connecting sleeve 702 to rotate, which in turn drives the connected transmission wheel B703 to rotate, and at this time, the transmission wheel B703 drives the gear shaft 704 to rotate.

[0036] A transmission wheel B703 is fixedly connected to the bottom end of the universal joint A701, and a gear shaft 704 is meshingly provided on the lower side of the transmission wheel B703 for transmission. The gear shaft 704 is slidingly fitted with the gear ring 603. A driving wheel 705 is fixedly connected to the outer end of one side of the gear shaft 704. One end of the gear shaft 704 connected to the driving wheel 705 is rotatably connected to the guide plate 8.

[0037] like Figure 8 As shown, one side of the guide plate 8 is in sliding contact with the lower outer wall of the switchgear body 1. A sand deflector 803 is fixedly connected to one side of the guide plate 8 in an inclined structure. Two guide rods 801 are fixedly connected to the guide plate 8, and the guide rods 801 are slidably engaged with the mounting bracket 6. Multiple springs B802 are fixedly connected to one side of the guide plate 8, and the other ends of the springs B802 are fixedly connected to the mounting bracket 6. The motor 401 drives the surrounding bracket 4 to rotate, which in turn drives the guide plate 8 to rotate around the switchgear body 1. The springs B802 ensure that the guide plate 8 connected to the guide rods 801 is always in contact with the outer wall of the switchgear body 1, thereby enabling the sand deflector 803 to push away accumulated sand.

[0038] like Figure 8As shown, the sand sweeping mechanism 9 includes a universal joint B901, the ends of which are rotatably connected to the guide plate 8 and the sand guide plate 803, respectively. The bottom end of the universal joint B901 is fixedly connected to a sand sweeping roller 902, and the bristles on the outside of the sand sweeping roller 902 are in sliding contact with the lower outer wall of the switch cabinet body 1. The top end of the universal joint B901 is fixedly connected to a driven wheel 903, which is meshed with the driving wheel 705. When the gear shaft 704 rotates, it can drive the connected driving wheel 705 to rotate, so that the driving wheel 705 can drive the universal joint B901 connected to the driven wheel 903 to rotate, and the universal joint B901 can drive the connected sand sweeping roller 902 to rotate.

[0039] By setting the sand guide plate 803, when the surrounding frame 4 rotates around the switch cabinet body 1 installed in the desert, the sand guide plate 803 will be driven to rotate synchronously, pushing away the sand accumulated around the switch cabinet body 1. At the same time, under the drive of the transmission mechanism 7, the sand sweeping roller 902 starts to rotate, and further cleans the sand after the sand guide plate 803 pushes away the sand, preventing sand and dust from clogging the equipment's heat dissipation ports or entering the electrical parts, thereby reducing the equipment failure rate and extending the service life.

[0040] Working Principle: When installing a high-voltage switchgear in a desert environment, first install the switchgear body 1 on the mounting base 2, then align the top of the mounting frame 6 with the bottom of the surrounding frame 4, so that the connecting sleeve 702 is plugged into the transmission plug rod 404, and then, under the action of the spring A602, the clamping block 601 is inserted into the clamping groove 405, thus achieving the installation and fixation of the mounting frame 6;

[0041] When sand accumulates around the switch cabinet body 1 during use, the motor 401 drives the surrounding frame 4 to rotate, which in turn drives the guide plate 8 to rotate around the switch cabinet body 1. Under the action of the spring B802, the guide plate 8 connected to the guide rod 801 is always in contact with the outer wall of the switch cabinet body 1, and the sand guide plate 803 is then able to push away the accumulated sand.

[0042] At the same time, under the action of the annular rack 502, the meshed transmission wheel A403 rotates, so that the transmission wheel A403 can drive the connected rotating shaft 402 to rotate, so that the rotating shaft 402 can drive the transmission plug rod 404 to rotate, so that the transmission plug rod 404 can drive the universal joint A701 connected to the connecting sleeve 702 to rotate, so that the universal joint A701 drives the connected transmission wheel B703 to rotate, and at this time the transmission wheel B703 can drive the gear shaft 704 to rotate;

[0043] When the gear shaft 704 rotates, it can drive the connected driving wheel 705 to rotate, so that the driving wheel 705 can drive the universal joint B901 connected to the driven wheel 903 to rotate, so that the universal joint B901 can drive the connected sand sweeping roller 902 to rotate, further cleaning the sand on the outer wall of the switch cabinet body 1, thereby ensuring the heat dissipation efficiency of the switch cabinet body 1;

[0044] When the motor 401 needs to be inspected, hold the limit handle 302, push up the protective cover 301, and then when the limit handle 302 is higher than the motor base 3, push the limit handle 302 so that the limit handle 302 moves to the motor base 3. At this time, the protective cover 301 can be kept open, which is convenient for inspecting the motor 401. After the inspection is completed, pull the limit handle 302 outward. At this time, under the action of the tension spring 304, the protective cover 301 will be automatically closed to protect the motor 401.

[0045] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0046] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage switchgear, comprising a switchgear body (1), characterized in that: The lower side of the switch cabinet body (1) is fixedly connected with a mounting seat (2), the top surface of the switch cabinet body (1) is fixedly connected with a motor seat (3), a surrounding frame (4) is rotatably connected to the motor seat (3), a ring frame (5) is fixedly connected to the surrounding frame (4), a mounting frame (6) is movably connected to the bottom end of the surrounding frame (4), a transmission mechanism (7) is rotatably connected to the mounting frame (6), a guide plate (8) is slidably fitted on one side of the mounting frame (6), and a sand sweeping mechanism (9) is rotatably connected to one side of the guide plate (8).

2. A high-voltage switchgear according to claim 1, characterized in that: A protective cover (301) is provided on the outside of the motor base (3) in a sliding manner. A limit handle (302) is provided on one side of the protective cover (301) in a sliding manner. The inner end of the limit handle (302) is movably contacted with the top surface of the motor base (3). Two limit rods (303) are fixedly connected on the other side of the protective cover (301). The limit rods (303) are provided in a T-shaped structure. The limit rods (303) are provided in a sliding manner with the inner wall of the motor base (3). A tension spring (304) is fixedly provided on the limit rod (303). The other end of the tension spring (304) is fixedly connected to the inner wall of the motor base (3).

3. The high-voltage switchgear according to claim 1, characterized in that: One end of the surrounding frame (4) connected to the motor seat (3) is fixedly connected to a motor (401), and the motor (401) is fixedly connected to the inner wall of the motor seat (3). A rotating shaft (402) is rotatably connected to the inner wall of one end of the surrounding frame (4). The top end of the rotating shaft (402) passes through the outer wall of the annular frame (5) and extends to the inside and is fixedly connected to a transmission wheel A (403). The bottom end of the rotating shaft (402) passes through the inner wall of the surrounding frame (4) and extends to the outside and is fixedly connected to a transmission plug rod (404). Both sides of the bottom end of the surrounding frame (4) are provided with clamping grooves (405).

4. A high-voltage switchgear according to claim 3, characterized in that: A fixed frame (501) is rotatably connected to one side of the annular frame (5), the fixed frame (501) is fixedly connected to the motor seat (3), an annular rack (502) is fixedly connected to the fixed frame (501), and the annular rack (502) is meshed with the transmission wheel A (403) for transmission.

5. A high-voltage switchgear according to claim 4, characterized in that: The inner walls of both sides of the upper end of the mounting frame (6) are both provided with clamping blocks (601) in a sliding manner, the outer end of the clamping block (601) is movably clamped with the inner wall of the clamping groove (405), the inner end of the clamping block (601) is fixedly connected with a spring A (602), the other end of the spring A (602) is fixedly connected with the inner wall of the mounting frame (6), the openings at both ends of the mounting frame (6) are both rotatably connected with gear rings (603), the inner end of the clamping block (601) is fixedly connected with a pull ring (604), and the pull ring (604) is slidably fitted through the inner wall of the mounting frame (6).

6. A high-voltage switchgear according to claim 5, characterized in that: The transmission mechanism (7) includes a universal joint A (701), both ends of which are rotatably connected to the inner wall of the mounting frame (6), a connecting sleeve (702) being fixedly connected to the top of the universal joint A (701), the top of the connecting sleeve (702) being a concave structure, and the connecting sleeve (702) being slidably matched with the outer wall of the transmission plug rod (404).

7. The high-voltage switchgear according to claim 6, characterized in that: The bottom end of the universal joint A (701) is fixedly connected to a transmission wheel B (703), the lower side of the transmission wheel B (703) is meshed with a gear shaft (704), the gear shaft (704) is slidingly matched with the gear ring (603), the outer end of one side of the gear shaft (704) is fixedly connected to a driving wheel (705), and one end of the gear shaft (704) connected to the driving wheel (705) is rotatably connected to the guide plate (8).

8. The high-voltage switchgear according to claim 7, characterized in that: One side of the guide plate (8) is arranged in sliding contact with the outer wall of the lower side of the switch cabinet body (1); one side of the guide plate (8) is fixedly connected with a sand guide plate (803) in an inclined structure; two guide rods (801) are fixedly connected to the guide plate (8); the guide rods (801) and the mounting frame (6) are arranged to slide through; one side of the guide plate (8) is fixedly connected with a plurality of springs B (802); the other end of the spring B (802) is fixedly connected with the mounting frame (6).

9. The high-voltage switchgear according to claim 8, characterized in that: The sand sweeping mechanism (9) comprises a universal joint B (901), the two ends of the universal joint B (901) are respectively connected to the guide plate (8) and the sand guide plate (803) for rotation, the bottom end of the universal joint B (901) is fixedly connected to a sand sweeping roller (902), the bristles on the outside of the sand sweeping roller (902) are in sliding contact with the lower outer wall of the switch cabinet body (1), the top end of the universal joint B (901) is fixedly connected to a driven wheel (903), and the driven wheel (903) is meshed with the driving wheel (705) for transmission.

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