Low pressure end device maintenance apparatus and method

Abstract

This invention provides a maintenance device and method for low-voltage terminal equipment, relating to the field of low-voltage terminal equipment maintenance technology. The device includes a meter protective shell, a support frame, and a connecting frame. A connecting plate is disposed on the top of the meter protective shell. The support frame and the connecting frame are fixedly connected. Two pairs of brackets are fixedly connected to the side of the connecting plate. Fixing blocks are fixedly connected to the opposite surfaces of the two pairs of brackets. A locking plate is movably engaged in each of the two pairs of fixing blocks. A cleaning block is fixedly connected to the opposite surfaces of the two pairs of locking plates. Two fixing plates are fixedly connected to the upper surface of the connecting plate, and a support plate is fixedly connected to the lower surface of the two fixing plates. The cleaning block moves back and forth within a certain range, and its surface is in close contact with the heat sink. During the movement, it can effectively clean the dust accumulated on the surface of the heat sink. The overall automated design effectively improves cleaning efficiency, avoids dust clogging on the heat sink, improves heat dissipation efficiency, thereby maintaining the operating performance of the meter protective shell and extending its service life.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage terminal equipment maintenance technology, and more specifically, relates to a low-voltage terminal equipment maintenance device and method. Background Technology

[0002] Low-voltage terminal equipment generally refers to the equipment used in low-voltage electrical systems. They are an important part of the power distribution, control and protection network. They are the end-user interface in the low-voltage power system, responsible for distributing electricity to end users, and may include intelligent identification and sensing technologies to realize data collection, monitoring and management of distribution network equipment and lines. Common low-voltage terminal equipment includes electricity meters, which are used to measure and record power consumption.

[0003] Common low-voltage terminal equipment still has the following shortcomings during maintenance:

[0004] 1. During the maintenance and cleaning of electricity meters, manual cleaning is still sometimes performed. 人 Cleaning the protective casing of an electricity meter typically requires a significant amount of time and labor, and manual cleaning may struggle to reach hard-to-reach areas, resulting in incomplete cleaning.

[0005] 2. Water is mostly used for cleaning electricity meters. Power needs to be disconnected during the cleaning process. Water cleaning may cause corrosion of the electricity meter. Impurities and salt in the water may corrode the metal parts of the electricity meter and affect its service life.

[0006] Therefore, in view of this, we have studied and improved the existing structure and defects to provide a low-voltage terminal equipment maintenance device and method, in order to achieve a more practical purpose. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a low-voltage terminal equipment maintenance device and method.

[0008] To achieve the above objectives, the following solution is adopted:

[0009] A low-voltage terminal equipment maintenance device includes a meter protective shell, a support frame, and a connecting frame. A connecting plate is disposed on the top of the meter protective shell. The support frame and the connecting frame are fixedly connected. Two pairs of brackets are fixedly connected to the side of the connecting plate. A fixing block is fixedly connected to the opposite face of each pair of brackets. A locking plate is movably engaged within each pair of fixing blocks. A cleaning block is fixedly connected to the opposite face of each pair of locking plates. Two fixing plates are fixedly connected to the upper surface of the connecting plate. A support plate is fixedly connected to the lower surface of the two fixing plates. A set of first connecting sleeves and a set of second connecting sleeves are disposed below the support plate. A set of second protective shells and a set of first protective shells are fixedly connected to the upper surfaces of the first connecting sleeves and the second connecting sleeves, respectively. A set of second protective shells and a set of first protective shells are each fixedly connected to a third gear. Two second transmission belts are respectively provided on the surfaces of the two sets of third gears. A set of cleaning brushes are fixedly connected to the inner walls of a set of second connecting sleeves and a set of first connecting sleeves. Two pairs of first gears are rotatably connected to the upper surface of the connecting plate. A first transmission belt is provided on the surface of the two pairs of first gears. A set of sliders is fixedly connected to the surface of the first transmission belt. A positioning block is fixedly connected to the rear surface of the rear fixed plate of the two fixed plates. A screw is rotatably connected between the support frame and the connecting frame. A third motor is fixedly installed on the upper surface of the connecting frame. The output shaft of the third motor is fixedly connected to the screw. The positioning block is threadedly sleeved with the screw.

[0010] Preferably, a set of second connecting sleeves and a set of first connecting sleeves are rotatably connected to connecting rings on their surfaces. A fixing frame is fixedly connected to the lower surface of the support plate. Both sets of connecting rings are fixedly connected to the fixing frame. A first motor is fixedly installed on the upper surface of the support plate. A connecting column is fixedly connected to the upper surface of the middle first protective shell in a set of first protective shells. The output shaft of the first motor is fixedly connected to the connecting column. A second gear is fixedly connected to the surfaces of the middle first protective shell and the middle second protective shell in a set of first protective shells and a set of second protective shells. A third transmission belt is provided on the surfaces of the two second gears.

[0011] Preferably, two pairs of first motors are fixedly connected to the upper surface of the connecting plate, and both pairs of first motors are movably connected to the first transmission belt. A second motor is fixedly installed on the lower surface of the connecting plate. The output shaft of the second motor is fixedly connected to the first gear located at the left front among the two pairs of first gears. A limit block is fixedly connected to the lower surface of each slider, and a high-pressure nozzle is fixedly connected to the lower surface of each limit block.

[0012] Preferably, the surface of the connecting plate is provided with two pairs of slots, a set of limiting blocks are movably connected to the two pairs of slots respectively, two limiting strips are fixedly connected to the back sides of the two pairs of cleaning blocks, two locking strips are fixedly connected to the back sides of the two pairs of fixing blocks respectively, each limiting strip is movably connected to each locking strip, a cylinder is fixedly installed on the upper surface of the two pairs of fixing blocks, and the output shafts of the two pairs of cylinders are fixedly connected to the two pairs of locking plates respectively.

[0013] A method for operating a low-voltage terminal equipment maintenance device includes,

[0014] Move the entire assembly, which is fixedly connected to the support frame and the connecting frame, above the meter protective housing, and ensure that it is aligned with the connecting plate above the meter protective housing.

[0015] Adjust the position of the two pairs of brackets so that the fixing blocks on their opposite sides are aligned with the heat sink area on the meter's protective casing.

[0016] The card plate moves the cleaning block into the heat sink of the meter's protective casing and engages with it.

[0017] The cleaning block moves up and down or back and forth inside the heat sink, and removes the dust accumulated on the surface of the heat sink through close contact between its surface and the heat sink.

[0018] During or after the heat sink is cleaned, a set of first connecting sleeves and a set of second connecting sleeves below the support plate descend with the support plate until they come into contact with the terminals on the meter protective housing.

[0019] The rotation of the third gear, through the transmission action of the second transmission belt, drives the cleaning brushes inside the first and second connecting sleeves to rotate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In this invention, the card plate moves along with the cleaning block that is fixed to it. The cleaning block is engaged with the two locking strips fixed on the fixed block by two limiting strips fixed on it, thereby ensuring its stability during movement. The cleaning block moves back and forth within a certain range, and its surface is in close contact with the heat sink. During the movement, it can effectively clean the dust accumulated on the surface of the heat sink. The overall automated design effectively improves cleaning efficiency, avoids dust clogging on the heat sink, improves heat dissipation efficiency, thereby maintaining the operating performance of the meter protective shell and extending its service life.

[0022] In this invention, during the cleaning process of the cleaning block, a set of high-pressure nozzles are activated to flush the dust on the heat sink with high-pressure airflow. The high-pressure nozzles are equipped with micro air pumps, and their output is controlled by an electronic controller. The high-pressure air jets output by the high-pressure nozzles can penetrate deep into the gaps of the heat sink to effectively remove dust and dirt. When used in conjunction with the cleaning block, residual impurities can be further removed. Unlike cleaning with water, high-pressure air is dry and will not leave water stains on the heat sink, avoiding corrosion or short circuit problems caused by moisture.

[0023] In this invention, the first transmission belt rotates and drives a set of sliders fixed on it to move together. The sliders are movably connected to the connecting plate through the limiting blocks fixed on them, thereby effectively ensuring stability during movement. Two pairs of positioning rings are fixed on the connecting plate to ensure the consistency of the position of the first transmission belt during rotation and to prevent it from falling off. The high-pressure nozzles are installed below the limiting blocks. The second motor drives a set of high-pressure nozzles to move back and forth through forward and reverse rotation. The reciprocating high-pressure nozzles can ensure that every area of ​​the heat sink is evenly covered, avoiding cleaning dead corners and further improving cleaning efficiency.

[0024] In this invention, the second and third transmission belts drive the third and second gears to rotate during rotation. At this time, both the second and first connecting sleeves are rotating, and each has a set of cleaning brushes on its inner wall. The cleaning brushes can clean the dust and oil stains on the surface of the terminal block during high-speed rotation. The cleaning brushes are designed to be flexible, which can reduce damage to the surface of the terminal block during cleaning, protect the conductive coating and metal surface, thereby reducing the contact resistance of the terminal block and improving the reliability of the electrical connection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the support plate structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the connecting plate structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the fixing block structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the fixing plate structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the transmission belt structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the fixing frame structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the connecting sleeve structure of the present invention.

[0033] In the diagram, the correspondence between the component names and the attached drawing numbers is as follows: 1. Meter protective shell; 2. Support frame; 3. Connecting frame; 4. Screw; 5. Connecting plate; 6. First transmission belt; 7. Bracket; 8. Cleaning block; 9. First connecting sleeve; 10. Fixing plate; 11. Support plate; 12. Fixing block; 13. First motor; 14. Second connecting sleeve; 15. Cylinder; 16. Locking strip; 17. Positioning ring; 18. Limiting strip; 19. Locking plate; 20. Second motor; 21. High-pressure nozzle; 22. Slider; 23. First gear; 24. Limiting block; 25. Slot; 26. Positioning block; 27. Connecting ring; 28. First protective shell; 29. ​​Fixing frame; 30. Second protective shell; 31. Second transmission belt; 32. Third transmission belt; 33. Second gear; 34. Connecting column; 35. Third gear; 36. Cleaning brush; 37. Third motor. Detailed Implementation

[0034] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0035] Please see Figure 1 - Figure 8This invention provides a low-voltage terminal equipment maintenance device, including a meter protective shell 1, a support frame 2, and a connecting frame 3. A connecting plate 5 is provided on the top of the meter protective shell 1. The support frame 2 and the connecting frame 3 are fixedly connected. Two pairs of brackets 7 are fixedly connected to the side of the connecting plate 5. Fixing blocks 12 are fixedly connected to the opposite surfaces of the two pairs of brackets 7. A locking plate 19 is movably engaged in the two pairs of fixing blocks 12. A cleaning block 8 is fixedly connected to the opposite surfaces of the two pairs of locking plates 19. Two fixing plates 10 are fixedly connected to the upper surface of the connecting plate 5. The lower surfaces of the two fixing plates 10 are fixedly connected to... A support plate 11 is provided, and a set of first connecting sleeves 9 and a set of second connecting sleeves 14 are provided below the support plate 11. A set of second protective shells 30 and a set of first protective shells 28 are respectively fixedly connected to the upper surfaces of the set of first connecting sleeves 9 and the set of second connecting sleeves 14. A third gear 35 is fixedly connected to the surface of the set of second protective shells 30 and the set of first protective shells 28. Two second transmission belts 31 are respectively provided on the surface of the two sets of third gears 35. A set of cleaning brushes 36 are fixedly connected to the inner walls of the set of second connecting sleeves 14 and the set of first connecting sleeves 9. Two pairs of first gears 23 are rotatably connected to the upper surface of the connecting plate 5. A first transmission belt 6 is provided on the surface of the two pairs of first gears 23. A set of sliders 22 is fixedly connected to the surface of the first transmission belt 6. A positioning block 26 is fixedly connected to the rear surface of the two fixed plates 10 located at the rear. A screw 4 is rotatably connected between the support frame 2 and the connecting frame 3. A third motor 37 is fixedly installed on the upper surface of the connecting frame 3. The output shaft of the third motor 37 is fixedly connected to the screw 4. The positioning block 26 is threadedly connected to the screw 4. During the movement of the clamping plate 19, it will drive the cleaning block 8 fixed thereto to move together. The cleaning block 8 is movably engaged with the two clamping strips 16 fixed on the fixed block 12 through the two limiting strips 18 fixed on it, thereby ensuring its stability during the movement. The cleaning block 8 moves back and forth within a certain range. Its surface is in close contact with the heat sink. During the movement, it can effectively clean the dust accumulated on the surface of the heat sink. The overall automated design effectively improves the cleaning efficiency, avoids dust blockage on the heat sink, improves heat dissipation efficiency, thereby maintaining the operating performance of the meter protection shell 1 and extending its service life.

[0036] A set of second connecting sleeves 14 and a set of first connecting sleeves 9 are both rotatably connected to connecting rings 27. A fixing frame 29 is fixedly connected to the lower surface of the support plate 11. Both sets of connecting rings 27 are fixedly connected to the fixing frame 29. A first motor 13 is fixedly installed on the upper surface of the support plate 11. A connecting post 34 is fixedly connected to the upper surface of the middle first protective shell 28 in a set of first protective shells 28. The output shaft of the first motor 13 is fixedly connected to the connecting post 34. A first protective shell 28 and a second protective shell 30 in a set of first protective shells 28 and a set of second protective shells 30 are both fixedly connected to the surface of the first protective shell 28 and the second protective shell 30. The two gears 33 each have a third transmission belt 32 on their surfaces. During the cleaning process of the cleaning block 8, a set of high-pressure nozzles 21 are activated to flush the dust on the heat sink with high-pressure airflow. The high-pressure nozzles 21 are equipped with a micro air pump, and their output is controlled by an electronic controller. The high-pressure air jets output by the high-pressure nozzles 21 can penetrate deep into the gaps of the heat sink to effectively remove dust and dirt. When used in conjunction with the cleaning block 8, residual impurities can be further removed. Unlike cleaning with water, high-pressure air is dry and will not leave water stains on the heat sink, avoiding corrosion or short circuit problems caused by moisture.

[0037] Two pairs of first motors 13 are fixedly connected to the upper surface of the connecting plate 5. Both pairs of first motors 13 are movably connected to the first transmission belt 6. A second motor 20 is fixedly installed on the lower surface of the connecting plate 5. The output shaft of the second motor 20 is fixedly connected to the first gear 23 located at the left front among the two pairs of first gears 23. A limit block 24 is fixedly connected to the lower surface of each slider 22. A high-pressure nozzle 21 is fixedly connected to the lower surface of each limit block 24. During the rotation of the first transmission belt 6, it will drive a set of sliders 22 fixed on it to move together. The sliders 22 are movably connected to the connecting plate 5 through the limit blocks 24 fixed on them, thereby effectively ensuring stability during the movement. Two pairs of positioning rings 17 are fixed on the connecting plate 5 to ensure the consistency of the position of the first transmission belt 6 during the rotation and to prevent it from falling off. The high-pressure nozzle 21 is installed below the limit block 24. The second motor 20 drives a set of high-pressure nozzles 21 to reciprocate by rotating forward and backward. The reciprocating high-pressure nozzles 21 can ensure that every area of ​​the heat sink is evenly covered, avoid cleaning dead corners, and further improve cleaning efficiency.

[0038] Two pairs of slots 25 are formed through the surface of the connecting plate 5. A set of limiting blocks 24 are movably connected to the two pairs of slots 25 respectively. Two limiting strips 18 are fixedly connected to the back of each of the two pairs of cleaning blocks 8. Two locking strips 16 are fixedly connected to the back of each of the two pairs of fixing blocks 12. Each limiting strip 18 is movably connected to each locking strip 16. Cylinders 15 are fixedly installed on the upper surface of each of the two pairs of fixing blocks 12. The output shafts of the two pairs of cylinders 15 are fixedly connected to the two pairs of locking plates 19 respectively. During the rotation of the second transmission belt 31 and the third transmission belt 32, the second third gear 35 and the second gear 33 will be driven to rotate. At this time, a set of second connecting sleeves 14 and a set of first connecting sleeves 9 are both in a rotating state. A set of cleaning brushes 36 is provided on the inner wall of both. During the high-speed rotation, the set of cleaning brushes 36 can clean the dust and oil stains on the surface of the terminal. The set of cleaning brushes 36 is designed to be flexible, which can reduce the damage to the surface of the terminal during the cleaning process, protect the conductive coating and metal surface, and thus reduce the contact resistance of the terminal and improve the reliability of the electrical connection.

[0039] A method for operating a low-voltage terminal equipment maintenance device includes:

[0040] The first step involves installing the entire meter inside the meter protective housing 1. During maintenance of the meter protective housing 1, the support frame 2 is first moved to align with the top of the meter protective housing 1. At this time, the third motor 37 is started, and its output shaft drives the screw 4 fixed to it to rotate. During the rotation of the screw 4, the positioning block 26 sleeved on it moves downward due to the thread action. During the movement of the positioning block 26, it drives the fixing plate 10 fixed to it to move together. During the movement of the fixing plate 10, it drives the two pairs of cleaning blocks 8 set below it to move together. During the downward movement of the two pairs of cleaning blocks 8, they are engaged with the heat sink fixed on the meter protective housing 1. At this time, the two pairs of cylinders 1 are started. 5. Its output shaft will drive the fixed card plate 19 to move up and down reciprocally. During the movement, the card plate 19 will drive the cleaning block 8 fixed to it to move together. The cleaning block 8 is movably engaged with the two card strips 16 fixed on the fixed block 12 through the two limit strips 18 fixed on it, thereby ensuring its stability during the movement. The cleaning block 8 moves back and forth within a certain range, and its surface is in close contact with the heat sink. During the movement, it can effectively clean the dust accumulated on the surface of the heat sink. The overall automatic design effectively improves the cleaning efficiency, avoids dust blockage on the heat sink, improves heat dissipation efficiency, thereby maintaining the operating performance of the meter protection shell 1 and extending its service life.

[0041] The second step involves activating a set of high-pressure nozzles 21 during the cleaning process. These nozzles, equipped with miniature air pumps and controlled by an electronic controller, deliver high-pressure airflow to clean the dust from the heatsink. The high-pressure airflow from the nozzles penetrates deep into the gaps of the heatsink, effectively removing dust and dirt. Combined with the cleaning block 8, this further removes any remaining impurities. Unlike water cleaning, the high-pressure air is dry and leaves no water stains on the heatsink, preventing corrosion or short circuits caused by moisture. Activating the second motor 20 causes its output shaft to drive the first gear 23, which is fixed to it, to rotate. This rotation of the first gear 23, in turn, drives the first transmission belt 6, which is engaged with it, to rotate. During rotation, the first transmission belt 6 drives three other first gears 23 to rotate. During rotation, the first transmission belt 6 drives a set of sliders 22 fixed on it to move together. The sliders 22 are movably connected to the connecting plate 5 through the limiting blocks 24 fixed on them, thereby effectively ensuring stability during movement. Two pairs of positioning rings 17 are fixed on the connecting plate 5 to ensure the consistency of the position of the first transmission belt 6 during rotation and to prevent it from falling off. The high-pressure nozzles 21 are installed below the limiting blocks 24. The second motor 20 drives a set of high-pressure nozzles 21 to move back and forth through forward and reverse rotation. The reciprocating movement of the high-pressure nozzles 21 can ensure that every area of ​​the heat sink is evenly covered, avoiding cleaning dead corners and further improving cleaning efficiency.

[0042] In the third step, during the descent and cleaning process of the two pairs of cleaning blocks 8, a set of first connecting sleeves 9 and a set of second connecting sleeves 14 also move downwards until they are in contact with the terminals set on the meter protective shell 1. The set of first connecting sleeves 9 and a set of second connecting sleeves 14 are sleeved on the surface of the terminals. By starting the first motor 13, its output shaft will drive the connecting post 34 fixed thereto to rotate. During the rotation of the connecting post 34, it will drive the first protective shell 28 fixed thereto to rotate. During the rotation of the first protective shell 28, it will drive the third gear 35 and the second gear 33 fixed thereto to rotate. During the rotation of the two gears, they will drive the second transmissions that are respectively engaged. The second transmission belt 31 and the third transmission belt 32 rotate, and during the rotation of the second transmission belt 31 and the third transmission belt 32, they will drive the other third gear 35 and the second gear 33 to rotate. At this time, a set of second connecting sleeves 14 and a set of first connecting sleeves 9 are both in a rotating state, and a set of cleaning brushes 36 are provided on the inner wall of both. During the high-speed rotation, the set of cleaning brushes 36 can clean the dust and oil stains on the surface of the terminal. The set of cleaning brushes 36 is a flexible design, which can reduce the damage to the surface of the terminal during the cleaning process, protect the conductive coating and metal surface, thereby reducing the contact resistance of the terminal and improving the reliability of the electrical connection.

[0043] Examples of the present invention are given for illustrative and descriptive purposes only and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A low-voltage terminal equipment maintenance device, comprising a meter protective shell (1), a support frame (2), and a connecting frame (3), characterized in that, A connecting plate (5) is provided on the top of the meter protective shell (1). The support frame (2) and the connecting frame (3) are fixedly connected. Two pairs of brackets (7) are fixedly connected to the side of the connecting plate (5). Fixing blocks (12) are fixedly connected to the opposite surfaces of the two pairs of brackets (7). A card plate (19) is movably engaged in the two pairs of fixing blocks (12). A cleaning block (8) is fixedly connected to the opposite surfaces of the two pairs of card plates (19). Two fixing plates (10) are fixedly connected to the upper surface of the connecting plate (5). A support plate (11) is fixedly connected to the lower surface of the two fixing plates (10). The support plate (11) is provided with three first connecting sleeves (9) and three second connecting sleeves (14) below it; a second protective shell (30) is fixedly connected to the upper surface of each of the three first connecting sleeves (9), and a first protective shell (28) is fixedly connected to the upper surface of each of the three second connecting sleeves (14); a third gear (35) is fixedly connected to the surface of each second protective shell (30) and each first protective shell (28); the three third gears (35) on the three second protective shells (30) are connected by a second transmission belt (31), and the three third gears (35) on the three first protective shells (28) are connected by another second transmission belt (31); a plurality of cleaning brushes (36) are fixedly connected to the inner wall of each second connecting sleeve (14) and each first connecting sleeve (9). The upper surface of the connecting plate (5) is rotatably connected to two pairs of first gears (23), and the surfaces of the two pairs of first gears (23) are provided with first transmission belts (6), and a set of sliders (22) are fixedly connected to the surface of the first transmission belts (6).

2. The low-voltage terminal equipment maintenance device as described in claim 1, characterized in that, A positioning block (26) is fixedly connected to the rear surface of the two fixed plates (10), and a screw (4) is rotatably connected between the support frame (2) and the connecting frame (3). A third motor (37) is fixedly installed on the upper surface of the connecting frame (3). The output shaft of the third motor (37) is fixedly connected to the screw (4), and the positioning block (26) is threadedly connected to the screw (4).

3. The low-voltage terminal equipment maintenance device as described in claim 1, characterized in that, A connecting ring (27) is rotatably connected to the surface of a set of second connecting sleeves (14) and a set of first connecting sleeves (9), and a fixing frame (29) is fixedly connected to the lower surface of the support plate (11). Both sets of connecting rings (27) are fixedly connected to the fixing frame (29).

4. The low-voltage terminal equipment maintenance device as described in claim 1, characterized in that, The support plate (11) is fixedly mounted with a first motor (13), and the upper surface of the first protective shell (28) located in the middle position along its arrangement direction is fixedly connected with a connecting column (34); wherein, the output shaft of the first motor (13) is fixedly connected to the connecting column (34).

5. The low-voltage terminal equipment maintenance device as described in claim 1, characterized in that, A second gear (33) is fixedly connected to the surface of the first protective shell (28) located in the middle position along its arrangement direction among the three first protective shells (28); another second gear (33) is fixedly connected to the surface of the second protective shell (30) located in the middle position along its arrangement direction among the three second protective shells (30); the two second gears (33) are connected by a third transmission belt (32).

6. The low-voltage terminal equipment maintenance device as described in claim 1, characterized in that, Two pairs of positioning rings (17) are fixedly connected to the upper surface of the connecting plate (5); Both pairs of positioning rings (17) are movably connected to the first transmission belt (6).

7. The low-voltage terminal equipment maintenance device as described in claim 1, characterized in that, The second motor (20) is fixedly installed on the lower surface of the connecting plate (5); The output shaft of the second motor (20) is fixedly connected to the first gear (23) located on the left front of the two pairs of first gears (23).

8. The low-voltage terminal equipment maintenance device as described in claim 1, characterized in that, A limit block (24) is fixedly connected to the lower surface of each slider (22); Each of the limiting blocks (24) has a high-pressure nozzle (21) fixedly connected to its lower surface.

9. The low-voltage terminal equipment maintenance device as described in claim 1, characterized in that, Two limiting strips (18) are fixedly connected to the back of each pair of cleaning blocks (8), and two locking strips (16) are fixedly connected to the back of each pair of fixing blocks (12). Each of the limiting bars (18) is movably connected to each of the locking bars (16), and cylinders (15) are fixedly installed on the upper surfaces of the two pairs of fixing blocks (12). The output shafts of the two pairs of cylinders (15) are fixedly connected to the two pairs of locking plates (19).

10. A method of operating the low-voltage terminal equipment maintenance device according to claim 1, characterized in that, include, Move the entire assembly of the support frame (2) and the connecting frame (3) to the top of the meter protective housing (1), and ensure that it is aligned with the connecting plate (5) on the top of the meter protective housing (1); Adjust the position of the two pairs of brackets (7) so that the fixing block (12) on the opposite side is directly opposite the heat sink area on the meter protective shell (1); The card plate (19) moves the cleaning block (8) into the heat sink of the meter protective shell (1) and engages with it; The cleaning block (8) moves up and down or back and forth inside the heat sink, and removes the dust accumulated on the surface of the heat sink through its close contact with the heat sink. While or after the heat sink is being cleaned, a set of first connecting sleeves (9) and a set of second connecting sleeves (14) below the support plate (11) descend with the support plate (11) until they come into contact with the terminals on the meter protective housing (1). The third gear (35) rotates, and through the transmission action of the second transmission belt (31), it drives the cleaning brush (36) in the first connecting sleeve (9) and the second connecting sleeve (14) to rotate.

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