Electric porcelain insulator with overheating protection function

Abstract

The invention provides an electric porcelain insulator with overheating protection, which comprises a box body, an electric porcelain insulator, a moving mechanism and a controller, and is characterized in that the electric porcelain insulator is rotatably arranged between the box body and a rack, a driving mechanism is arranged on the top surface of the box body, and a first L-shaped frame and a second L-shaped frame are oppositely arranged on the top surface of the box body; a non-contact temperature sensor and a pressure measuring mechanism are arranged on the side face of the moving mechanism, the second lead screw is in driving connection with a third motor and provided with a second moving block, a cleaning mechanism is arranged on the side face of the second moving block and rotationally provided with a rotating plate, and the rotating plate is connected to the top face of the cleaning mechanism through a first electric push rod. The rotating plate is connected with a supporting plate through a second electric push rod, the gas-liquid pump is connected with a spraying pipe through a pressure pipe, and the spraying pipe and the sound receiver are arranged on the bottom face of the supporting plate. The non-contact temperature sensor is arranged to monitor the insulator, the gas-liquid pump extracts cooling liquid and air to cool and clean the insulator, and meanwhile, the surface crack of the insulator is detected according to the sound frequency.

Description

Technical Field

[0001] The invention relates to the technical field of thermal protection electric porcelain insulators, in particular to an electric porcelain insulator with overheat protection. Background Art

[0002] Insulators are vital components in power systems. They are used to be installed between conductors of different potentials or between conductors and grounded structures, and have the ability to withstand voltage and mechanical stress. There are many types of insulators with different shapes, but their basic structure usually consists of two parts: insulating parts and connecting fittings. These insulating components play the role of isolation, support and fixation in overhead transmission lines, ensuring that the current flows along the predetermined path and preventing current leakage and short-circuit accidents. Porcelain insulators, as a type of insulator, are mainly made of ceramic as the main material. This ceramic is usually composed of inorganic non-metallic compounds such as alumina and silicate. Porcelain insulators have extremely high insulation properties and excellent mechanical strength. They can effectively prevent current from passing under high-voltage electric fields, and play the role of isolation, support and fixation. When high-voltage current flows in the transmission line, porcelain insulators can act as a solid barrier to isolate the current from the surrounding air, ground and other media, ensuring the safe operation of the power system.

[0003] When the porcelain insulator is in good operating condition, it is normal to generate heat due to the presence of a certain amount of leakage current. However, when the performance of the porcelain insulator deteriorates, such as bird droppings on the porcelain surface causing the surface to become dirty or cracked, these impurities will destroy the insulation performance of the insulator, causing the creepage leakage current to increase, the heat to increase, and thus the temperature of the insulator to rise. The overheating problem will not only affect the electrical performance and mechanical strength of the porcelain insulator, but may also cause more serious safety accidents. Therefore, it is particularly important to develop a porcelain insulator with overheat protection. Summary of the invention

[0004] In view of this, the present invention proposes an electric porcelain insulator with overheat protection. According to the surface temperature of the insulator detected by a non-contact temperature sensor, an air-liquid pump extracts coolant and air to cool and clean the insulator. At the same time, cracks on the surface of the insulator are detected according to the sound frequency, thereby ensuring the safe and stable operation of the electric porcelain insulator and avoiding damage caused by overtemperature.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A porcelain insulator with overheat protection comprises a box body, a porcelain insulator, a moving mechanism and a controller, wherein a frame is provided on the side of the box body, the porcelain insulator is rotatably arranged between the box body and the frame, a high-voltage power line is passed through the middle of the porcelain insulator, a driving mechanism is provided on the top surface of the box body, the driving mechanism is connected to the porcelain insulator, a first L-shaped frame and a second L-shaped frame are provided on the top surface of the box body, the moving mechanism is provided on the first L-shaped frame, a contactless temperature sensor and a pressure measuring mechanism are provided on the side surface of the first L-shaped frame, the pressure measuring mechanism is used to detect the voltage difference at different heights of the porcelain insulator, the detection direction of the contactless temperature sensor is toward the porcelain insulator, a second screw rod is rotatably arranged on the second L-shaped frame, one end of the second screw rod is rotatably connected to the box body, and the other end passes through the second L-shaped frame and is driven by a third motor, the third motor The machine is arranged on the top surface of the second L-shaped frame, the second screw rod is provided with a second moving block, the side of the second moving block is provided with a cleaning mechanism, the top surface of the cleaning mechanism is rotatably provided with a rotating plate, the rotating plate is connected to the top surface of the cleaning mechanism through a first electric push rod, the bottom surface of the rotating plate is provided with a second electric push rod, the telescopic end of the second electric push rod is provided with a support plate, the top surface of the second L-shaped frame is provided with an air-liquid pump, the air-liquid pump is connected with a nozzle through a pressure pipe, the nozzle is arranged on the bottom surface of the support plate, the bottom surface of the support plate is also provided with a microphone, the air-liquid pump is connected to the bottom of the box through a connecting pipe, the connecting pipe is provided with a three-way valve, the controller is arranged on the side of the box and is electrically connected to the moving mechanism, the contactless temperature sensor, the pressure measuring mechanism, the driving mechanism, the third motor, the cleaning mechanism, the first electric push rod, the second electric push rod, the air-liquid pump, the microphone and the three-way valve.

[0007] Preferably, the moving mechanism includes a first screw rod, a first motor and a first moving block. The first screw rod is rotatably disposed on the first L-shaped frame, one end of which is rotatably disposed on the top of the box body, and the other end passes through the first L-shaped frame and is driven to the first motor. The first motor is disposed on the top surface of the first L-shaped frame.

[0008] Preferably, the pressure measuring mechanism includes a second motor, a driving bevel gear, a driven bevel gear, a first rotating shaft and a contact rod. The second motor is arranged on the bottom surface of the first moving block, and its output shaft is sleeved with the driving bevel gear. The first rotating shaft is rotatably arranged on the first moving block, and its two ends are respectively located on the top surface and the bottom surface of the first moving block. Contact rods parallel to each other are respectively provided at both ends of the first rotating shaft. The driven bevel gear is sleeved on the first rotating shaft and meshes with the driving bevel gear.

[0009] Preferably, the electric porcelain insulator includes an insulating umbrella skirt, an inner sleeve, an inner bearing and an outer bearing, the outer bearing is sleeved on the bottom of the insulating umbrella skirt and installed on the water accumulation tray, the insulating umbrella skirt is provided with a through hole, and the inner sleeve is rotatably arranged in the through hole through the inner bearing.

[0010] Preferably, it also includes an internal circulation heat dissipation mechanism, which includes a sealing ring, a first conduit, a second conduit and a circulation pump. The top of the porcelain insulator passes through the top of the frame and is provided with a sealing ring on the upper and lower ends that rotate relative to each other. A through hole is provided in the middle of the sealing ring, and a ring groove 1 is provided on the inner wall of the through hole. Ring grooves 2 are respectively provided at the upper and lower ends of the insulating umbrella skirt. A spiral channel is provided in the insulating umbrella skirt, and the spiral channel is respectively connected to the upper and lower ring grooves 2. The ring groove 1 and the ring groove 2 are connected to each other. The sealing ring is connected to the accommodating chamber in the box body through the first conduit. A circulation pump is provided on the first conduit, and the circulation pump is arranged on the top surface of the frame. The sealing ring is connected to the accommodating chamber through the second conduit.

[0011] Preferably, the cleaning mechanism includes a third electric push rod, a U-shaped frame, a second rotating shaft, a fourth motor and bristles, the third electric push rod is arranged on the side of the second moving block, and its telescopic end is connected to the side of the U-shaped frame, the second rotating shaft is rotatably arranged on the U-shaped frame, one end of which is rotatably arranged on the U-shaped frame, and the other end passes through the U-shaped frame and is driven to the fourth motor, the fourth motor is arranged on the bottom surface of the U-shaped frame, and the bristle sleeve is arranged on the second rotating shaft.

[0012] Preferably, the driving mechanism includes a fifth motor, a driving gear and a driven gear, the third motor is arranged on the top surface of the water collecting tray, and its output shaft is provided with a driving gear, the driven gear is sleeved on the lower end of the electric porcelain insulator, and the driven gear is meshed with the driving gear.

[0013] Preferably, it also includes a water collecting pan, which is arranged on the top surface of the box body and below the electric porcelain insulator. A water return hole is arranged at the bottom of the water collecting pan, and the water return hole is connected to the box body.

[0014] Preferably, it also includes a distance sensor, which is arranged on the bottom surface of the support plate and is electrically connected to the controller.

[0015] Preferably, it also includes an outer bearing, which is sleeved on the bottom end of the electric porcelain insulator, and the electric porcelain insulator is rotatably arranged on the top of the box body through the outer bearing.

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

[0017] 1. The present invention is provided with a non-contact temperature sensor, which monitors the temperature of the insulator in real time under the drive of the moving mechanism, and the driving mechanism drives the electric porcelain insulator to rotate. When the non-contact temperature sensor detects that the surface temperature of the electric porcelain insulator is too high, the controller starts the gas-liquid pump, and the gas-liquid pump extracts the coolant in the box body, passes through the connecting pipe and sprays it out from the nozzle, so as to cool the electric porcelain insulator; after the cooling operation is completed, the three-way valve is used to extract air from the gas-liquid pump to clean the surface of the electric porcelain insulator. At the same time, the microphone detects the sound of air flow and the impact on the surface of the electric porcelain insulator. According to the frequency of the sound, the surface cracks of the electric porcelain insulator can be detected to ensure the safe and stable operation of the electric porcelain insulator;

[0018] 2. An internal circulation heat dissipation mechanism is provided. When the non-contact temperature sensor detects that the surface temperature of the insulator is too high, the circulation pump is started at the same time. The circulation pump extracts the arc-extinguishing coolant and enters the ring groove 1 and the ring groove 2 through the conduit 1. After passing through the spiral channel from the ring groove 2, it flows back to the box from the conduit 2. When the arc-extinguishing coolant flows through the spiral channel, it can take away the internal heat of the insulator, thereby preventing the insulator from being overheated. When the temperature of the arc-extinguishing coolant increases, the viscosity decreases and the fluidity is good, which is conducive to the normal operation of the gas-liquid pump;

[0019] 3. A pressure measuring mechanism is provided to detect the voltage difference at the preset height of the porcelain insulator, so as to judge whether there is any abnormality in the porcelain insulator. When the voltage difference is too large, the resistance of the porcelain insulator decreases, and the cleaning mechanism is started to clean the surface of the porcelain insulator to eliminate dirt such as bird droppings, so as to ensure that the porcelain insulator is in normal working condition;

[0020] 4. Set up a water collecting tray. When the gas-liquid pump draws out the arc-extinguishing coolant in the box, passes through the connecting pipe and is sprayed out from the nozzle to cool the porcelain insulator, the arc-extinguishing coolant will fall into the water collecting tray below. There is a return hole at the bottom of the water collecting tray. The arc-extinguishing coolant flows back into the box from the return hole, completing the recovery of the arc-extinguishing coolant and reusing it to avoid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a structural schematic diagram of an electric porcelain insulator with overheat protection of the present invention;

[0023] Figure 2 It is a schematic cross-sectional structure diagram of an electric porcelain insulator with overheat protection according to the present invention;

[0024] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0025] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0026] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of the electric porcelain insulator of the present invention;

[0028] Figure 7 for Figure 6 The enlarged view of point D in the middle;

[0029] Figure numerals: 1, box body; 2, water collecting tray; 3, first L-shaped frame; 4, first screw rod; 5, first motor; 6, second L-shaped frame; 7, second screw rod; 8, second motor; 9, gas-liquid pump; 10, three-way valve; 11, pressure pipe; 12, rotating plate; 13, first electric push rod; 14, second electric push rod; 15, U-shaped frame; 16, third motor; 17, first rotating shaft; 18, bristles; 19, third electric push rod; 20, controller; 21, insulating umbrella skirt; 22, inner sleeve; 23, first moving block; 24, fourth motor; 25, main Moving bevel gear; 26, driven bevel gear; 27, second rotating shaft; 28, contact rod; 29, non-contact temperature sensor; 30, support plate; 31, nozzle; 32, distance sensor; 33, microphone; 34, inner bearing; 35, outer bearing; 36, spiral channel; 37, return hole; 38, fifth motor; 39, driving gear; 40, driven gear; 41, second moving block; 42, conduit 1; 43, conduit 2; 44, sealing ring; 45, ring groove 1; 46, ring groove 2; 47, connecting pipe; 48, circulating pump; 49, frame. DETAILED DESCRIPTION

[0030] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0031] See also Figures 1 to 7The present invention provides a porcelain insulator with overheat protection, comprising a box body 1, a porcelain insulator, a moving mechanism and a controller 20. A frame 49 is provided on the side of the box body 1. The porcelain insulator is rotatably arranged between the box body 1 and the frame 49. A high-voltage power line is passed through the middle of the porcelain insulator. A driving mechanism is provided on the top surface of the box body 1. The driving mechanism is connected to the porcelain insulator. A first L-shaped frame 3 and a second L-shaped frame 6 are provided on the top surface of the box body 1. The moving mechanism is arranged on the first L-shaped frame 3. A non-contact temperature sensor 29 and a pressure measuring mechanism are provided on the side, and the pressure measuring mechanism is used to detect the voltage difference at different heights of the insulator. The detection direction of the non-contact temperature sensor 29 is toward the insulator. A second screw rod 7 is rotatably provided on the second L-shaped frame 6. One end of the second screw rod 7 is rotatably connected to the box body 1, and the other end passes through the second L-shaped frame 6 and is driven by a third motor 16. The third motor 16 is provided on the top surface of the second L-shaped frame 6. The third motor 16 adopts a stepping motor that can accurately control the rotation angle. A second moving block 41 is provided on the second screw rod 7, a cleaning mechanism is provided on the side of the second moving block 41, a rotating plate 12 is rotatably provided on the top surface of the cleaning mechanism, the rotating plate 12 is connected to the top surface of the cleaning mechanism through a first electric push rod 13, a second electric push rod 14 is provided on the bottom surface of the rotating plate 12, a support plate 30 is provided on the telescopic end of the second electric push rod 14, a gas-liquid pump 9 is provided on the top surface of the second L-shaped frame 6, the gas-liquid pump 9 is connected to a nozzle 31 through a pressure pipe 11, and the nozzle 31 is provided on the bottom surface of the support plate 30. A microphone 33 is also provided on the bottom surface of the support plate 30, the gas-liquid pump 9 is connected to the bottom of the box body 1 through a connecting pipe 47, and a three-way valve 10 is provided on the connecting pipe 47. The controller 20 is arranged on the side of the box body 1 and is electrically connected to the moving mechanism, the contactless temperature sensor 29, the pressure measuring mechanism, the driving mechanism, the third motor 16, the cleaning mechanism, the first electric push rod 13, the second electric push rod 14, the gas-liquid pump 9, the microphone 33 and the three-way valve 10. The controller 20 adopts a low-power microprocessor with model STM32-L0.

[0032] A high-voltage power line is passed through the middle of the porcelain insulator, and the high-voltage power line is connected to electrical equipment such as a transformer in the box 1. When the electrical equipment is working, the driving mechanism and the moving mechanism are started at the same time. The driving mechanism drives the porcelain insulator to rotate continuously, and the moving mechanism drives the pressure measuring mechanism to move up and down. The pressure measuring mechanism is used to detect the voltage difference at different heights of the porcelain insulator, and judge whether the porcelain insulator is in a normal working state according to the voltage difference. When it is detected that the voltage difference exceeds the preset value, the third motor 16 is started, and the rotation of the third motor 16 drives the second screw rod 7 to rotate, and the rotation of the second screw rod 7 drives the second moving block 41 to move along the axis of the second screw rod 7. The movement of the second moving block 41 drives the cleaning mechanism to move, and then the cleaning mechanism is started to clean the porcelain insulator. After the cleaning operation is completed, the gas-liquid pump 9 is started, and the gas-liquid pump 9 extracts the coolant stored in the box 1. The coolant uses a coolant with insulation and arc extinguishing properties. The coolant enters the pressure tube 11 through the connecting tube 47, then enters the nozzle 31 from the pressure tube 11, and finally is ejected from the nozzle 31, impacting the surface of the electric porcelain insulator to complete the cleaning operation; after the cleaning operation is completed, the pressure measuring mechanism is started again to detect the electric porcelain insulator, and the cleaning mechanism is stopped after the pressure difference is within the normal range; at the same time, the contactless temperature sensor 29 moves under the drive of the moving mechanism to monitor the temperature of the outer surface of the electric porcelain insulator. When it is detected that the temperature of the electric porcelain insulator exceeds the preset value, the detection signal is transmitted to the controller 20, and the controller 20 starts the gas-liquid pump 9, and the gas-liquid pump 9 extracts the coolant stored in the box 1, and the coolant enters the pressure tube 11 through the connecting tube 47, then enters the nozzle 31 from the pressure tube 11, and finally is ejected from the nozzle 31, and the coolant continuously flows downward from the top of the electric porcelain insulator, thereby taking away the heat on the electric porcelain insulator, so that the temperature of the electric porcelain insulator is reduced. When the temperature of the electric porcelain insulator is normal, start the three-way valve 10, close one end of the connecting pipe 47, and connect the end connected to the external air at the same time. The gas-liquid pump 9 pumps air into the pressure pipe 11, and the air enters the nozzle 31 from the pressure pipe 11, and is ejected from the nozzle 31 to continuously impact the outer surface of the electric porcelain insulator, thereby cleaning the coolant and avoiding residue. The air is ejected from the nozzle 31. When cracks appear on the surface of the electric porcelain insulator, the air passes through the crack gap quickly. Due to the limitation of the gap, the propagation path of the sound wave becomes narrow, and the wavelength λ of the sound wave will be shortened. According to the relationship v=f×λ, when the speed v remains unchanged and the wavelength λ is shortened, in order to maintain the balance of the equation, the frequency f will increase. The sound receiver 33 detects the sound frequency of the airflow in real time, and can judge whether the surface of the electric porcelain insulator is cracked according to the sound frequency, so that the electric porcelain insulator can be replaced in time to avoid leakage accidents.

[0033] Preferably, the moving mechanism includes a first screw rod 4, a first motor 5 and a first moving block 23, the first screw rod 4 is rotatably disposed on the first L-shaped frame 3, one end of which is rotatably disposed on the top of the box body 1, and the other end passes through the first L-shaped frame 3 and is driven to the first motor 5, the first motor 5 is disposed on the top surface of the first L-shaped frame 3, and the first motor 5 adopts a stepping motor that can accurately control the rotation angle.

[0034] The moving mechanism is used to drive the pressure measuring mechanism and the non-contact temperature sensor 29 to move up and down. When the moving mechanism is working, the first motor 5 is first started, the first motor 5 rotates to drive the first screw rod 4 to rotate, the first screw rod 4 rotates to drive the first moving block 23 to move along the axis of the first screw rod 4, and the first moving block 23 moves to realize the pressure measuring mechanism and the non-contact temperature sensor 29 to move up and down.

[0035] Preferably, the pressure measuring mechanism includes a second motor 8, a driving bevel gear 25, a driven bevel gear 26, a first rotating shaft 17 and a contact rod 28. The second motor 8 is arranged on the bottom surface of the first moving block 23, and its output shaft is sleeved with the driving bevel gear 25. The first rotating shaft 17 is rotatably arranged on the first moving block 23, and its two ends are respectively located on the top surface and the bottom surface of the first moving block 23. Contact rods 28 parallel to each other are respectively provided at both ends of the first rotating shaft 17. The driven bevel gear 26 is sleeved on the first rotating shaft 17 and meshes with the driving bevel gear 25.

[0036] The pressure measuring mechanism is used to detect the voltage between two adjacent skirts on the insulator, so as to determine whether the insulator is in a normal working state. When the high-voltage incoming line is working normally, the moving mechanism is started, and the moving mechanism drives the pressure measuring mechanism to move. First, the second motor 8 is started, and the second motor 8 rotates to drive the driving gear 39 to rotate, and the driving gear 39 drives the driven gear 40 to rotate, and the driven gear 40 drives the first rotating shaft 17 to rotate, thereby driving the contact rod 28 to rotate, and the contact rod 28 is respectively in contact with the top and bottom of the electromagnetic insulator skirt.

[0037] Preferably, the electric porcelain insulator includes an insulating umbrella skirt 21, an inner sleeve 22, an inner bearing 34 and an outer bearing 35, the outer bearing 35 is sleeved on the bottom of the insulating umbrella skirt 21 and installed on the water accumulation tray, the insulating umbrella skirt 21 is provided with a through hole, and the inner sleeve 22 is rotatably arranged in the through hole through the inner bearing 34.

[0038] A high-voltage power line is passed through the middle of the insulator, and the high-voltage power line is connected to electrical equipment such as a transformer in the box 1. When the electrical equipment is working, the moving mechanism and the driving mechanism are started at the same time. The driving mechanism drives the insulating umbrella skirt 21 to rotate, and the contactless temperature sensor 29 and the cleaning mechanism can comprehensively scan and clean the outer surface of the insulator. At this time, the high-voltage power line is passed through the inner sleeve 22 and remains stationary, which does not affect the normal operation of the high-voltage power line.

[0039] Preferably, it also includes an internal circulation heat dissipation mechanism, which includes a sealing ring 44, a conduit 1 42, a conduit 2 43 and a circulation pump 48. The top of the electric porcelain insulator passes through the top of the frame 49 and is provided with a sealing ring 44 on the upper and lower ends thereof for relative rotation. A through hole is provided in the middle of the sealing ring 44, and a ring groove 1 45 is provided on the inner wall of the through hole. Ring grooves 46 are provided on the upper and lower ends of the insulating umbrella skirt 21, respectively. A spiral channel 36 is provided in the insulating umbrella skirt 21, and the spiral channel 36 is connected to the upper and lower ring grooves 46, respectively. The ring groove 1 45 and the ring groove 2 46 are connected to each other. The sealing ring 44 is connected to the accommodating chamber in the box body 1 through the conduit 1 42. A circulation pump 48 is provided on the conduit 1 42. The circulation pump 48 is arranged on the top surface of the frame 49. The sealing ring 44 is connected to the accommodating chamber through the conduit 2 43.

[0040] The internal circulation heat dissipation mechanism is used to dissipate heat inside the electromagnetic insulator. When the pressure measuring mechanism detects that the temperature of the electromagnetic insulator is higher than the preset value, the circulation pump 48 is started. The circulation pump 48 draws the coolant out of the accommodating chamber in the box body 1, so that the coolant continuously flows into the annular groove 1 45 through the conduit 1 42, and enters the annular groove 2 46 from the annular groove 1 45, and then enters the spiral channel 36 from the annular groove 2 46, and then flows into the annular groove 2 46 at the lower end through the spiral channel 36, and enters the annular groove 1 45 at the lower end from the annular groove 2 46, and then flows from the annular groove 1 45 through the conduit 2 43 into the accommodating chamber.

[0041] Preferably, the cleaning mechanism includes a third electric push rod 19, a U-shaped frame 15, a second rotating shaft 27, a fourth motor 24 and bristles 18. The third electric push rod 19 is arranged on the side of the second movable block 41, and its telescopic end is connected to the side of the U-shaped frame 15. The second rotating shaft 27 is rotatably arranged on the U-shaped frame 15, one end of which is rotatably arranged on the U-shaped frame 15, and the other end passes through the U-shaped frame 15 and is driven to the fourth motor 24. The fourth motor 24 is arranged on the bottom surface of the U-shaped frame 15, and the bristles 18 are sleeved on the second rotating shaft 27.

[0042] When the cleaning mechanism is working, first start the fourth motor 24, the rotation of the fourth motor 24 drives the second rotating shaft 27 to rotate, the rotation of the second rotating shaft 27 drives the bristles 18 to rotate, and then start the third electric push rod 19, the telescopic end of the third electric push rod 19 extends to drive the U-shaped frame 15 to move, the movement of the U-shaped frame 15 drives the bristles 18 to approach and abut the outer surface of the porcelain insulator, thereby cleaning the outer surface of the porcelain insulator.

[0043] Preferably, the driving mechanism includes a fifth motor 38, a driving gear 39 and a driven gear 40. The third motor 16 is arranged on the top surface of the water collecting tray 2, and its output shaft is provided with a driving gear 39. The driven gear 40 is sleeved on the lower end of the electric porcelain insulator, and the driven gear 40 and the driving gear 39 are meshed with each other.

[0044] The driving mechanism is used to drive the insulator to rotate. When the driving mechanism works, the fifth motor 38 is started first, and the fifth motor 38 rotates to drive the driving gear 39, and the driving gear 39 rotates to drive the driven gear 40. The driven gear 40 is sleeved on the lower end of the insulator, thereby driving the insulator to rotate.

[0045] Preferably, it further comprises a water collecting pan 2 , which is arranged on the top surface of the box body 1 and below the electric porcelain insulator. A water return hole 37 is arranged at the bottom of the water collecting pan 2 , and the water return hole 37 is communicated with the box body 1 .

[0046] The water collecting pan 2 is arranged on the top surface of the box body 1 and is located below the insulator. After the coolant cools the insulator, it drips from the insulator into the water collecting pan 2 and flows back into the box body 1 from the return hole 37 at the bottom of the water collecting pan 2. It can be recycled and reused to improve the utilization rate of the coolant.

[0047] Preferably, a distance sensor 32 is further included, and the distance sensor 32 is disposed on the bottom surface of the support plate 30 and is electrically connected to the controller 20 .

[0048] The distance sensor 32 is arranged on the bottom surface of the support plate 30. When the telescopic end of the second electric push rod 14 extends to drive the support plate 30 close to the porcelain insulator, the nozzle 31 approaches the porcelain insulator along with the support plate 30. The distance sensor 32 detects the distance between the nozzle 31 and the surface of the porcelain insulator in real time to ensure that a preset distance is maintained between the nozzle 31 and the porcelain insulator, which is beneficial to the consistency of the sound detection of the airflow by the microphone 33, improves the reliability of the sound detection, and avoids potential collision risks.

[0049] Preferably, it further comprises an outer bearing 35 , wherein the outer bearing 35 is sleeved on the bottom end of the electric porcelain insulator, and the electric porcelain insulator is rotatably arranged on the top of the box body 1 through the outer bearing 35 .

[0050] The outer bearing 35 is sleeved on the bottom end of the insulator, so that the insulator can rotate relative to the top of the box body 1. The outer bearing 35 can effectively reduce friction, improve the flexibility of the insulator, and extend the service life.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric porcelain insulator with overheat protection, characterized in that: The invention comprises a box body, a porcelain insulator, a moving mechanism and a controller. A frame is provided on the side of the box body. The porcelain insulator is rotatably provided between the box body and the frame. A high-voltage power line is passed through the middle of the porcelain insulator. A driving mechanism is provided on the top surface of the box body. The driving mechanism is connected to the porcelain insulator. A first L-shaped frame and a second L-shaped frame are provided on the top surface of the box body. The moving mechanism is provided on the first L-shaped frame. A contactless temperature sensor and a pressure measuring mechanism are provided on the side surface of the first L-shaped frame. The pressure measuring mechanism is used to detect the voltage difference at different heights of the porcelain insulator. The detection direction of the contactless temperature sensor is toward the porcelain insulator. A second screw rod is rotatably provided on the second L-shaped frame. One end of the second screw rod is rotatably connected to the box body, and the other end passes through the second L-shaped frame and is connected to a third motor. The third motor is provided on the second L-shaped frame. The top surface of the frame, the second screw rod is provided with a second moving block, the side of the second moving block is provided with a cleaning mechanism, the top surface of the cleaning mechanism is rotatably provided with a rotating plate, the rotating plate is connected to the top surface of the cleaning mechanism through a first electric push rod, the bottom surface of the rotating plate is provided with a second electric push rod, the telescopic end of the second electric push rod is provided with a support plate, the top surface of the second L-shaped frame is provided with an air-liquid pump, the air-liquid pump is connected with a nozzle through a pressure pipe, the nozzle is arranged on the bottom surface of the support plate, the bottom surface of the support plate is also provided with a microphone, the air-liquid pump is connected to the bottom of the box through a connecting pipe, the connecting pipe is provided with a three-way valve, the controller is arranged on the side of the box and is electrically connected to the moving mechanism, the contactless temperature sensor, the pressure measuring mechanism, the driving mechanism, the third motor, the cleaning mechanism, the first electric push rod, the second electric push rod, the air-liquid pump, the microphone and the three-way valve.

2. The electric porcelain insulator with overheat protection according to claim 1, characterized in that: The moving mechanism includes a first screw rod, a first motor and a first moving block. The first screw rod is rotatably arranged on the first L-shaped frame, one end of which is rotatably arranged on the top of the box body, and the other end passes through the first L-shaped frame and is driven to the first motor. The first motor is arranged on the top surface of the first L-shaped frame.

3. The electric porcelain insulator with overheat protection according to claim 2, characterized in that: The pressure measuring mechanism includes a second motor, a driving bevel gear, a driven bevel gear, a first rotating shaft and a contact rod. The second motor is arranged on the bottom surface of the first moving block, and its output shaft is sleeved with the driving bevel gear. The first rotating shaft is rotatably arranged on the first moving block, and its two ends are respectively located on the top surface and the bottom surface of the first moving block. Contact rods parallel to each other are respectively provided at the two ends of the first rotating shaft. The driven bevel gear is sleeved on the first rotating shaft and meshes with the driving bevel gear.

4. The electric porcelain insulator with overheat protection according to claim 1, characterized in that: The electric porcelain insulator comprises an insulating skirt, an inner sleeve and an inner bearing. A through hole is arranged in the insulating skirt, and the upper and lower ends of the inner sleeve are rotatably arranged in the through hole through the inner bearing.

5. The electric porcelain insulator with overheat protection according to claim 4, characterized in that: It also includes an internal circulation heat dissipation mechanism, which includes a sealing ring, a first conduit, a second conduit and a circulation pump. The top of the electric porcelain insulator passes through the top of the frame and is provided with sealing rings at the upper and lower ends that rotate relatively. A through hole is provided in the middle of the sealing ring, and a first ring groove is provided on the inner wall of the through hole. The upper and lower ends of the insulating umbrella skirt are respectively provided with second ring grooves. A spiral channel is provided in the insulating umbrella skirt, and the spiral channel is respectively connected to the upper and lower second ring grooves. The first ring groove and the second ring groove are connected to each other. The sealing ring is connected to the accommodating cavity in the box body through the first conduit. A circulation pump is provided on the first conduit, and the circulation pump is arranged on the top surface of the frame. The sealing ring is connected to the accommodating cavity through the second conduit.

6. The electric porcelain insulator with overheat protection according to claim 1, characterized in that: The cleaning mechanism includes a third electric push rod, a U-shaped frame, a second rotating shaft, a fourth motor and bristles. The third electric push rod is arranged on the side of the second moving block, and its telescopic end is connected to the side of the U-shaped frame. The second rotating shaft is rotatably arranged on the U-shaped frame, one end of which is rotatably arranged on the U-shaped frame, and the other end passes through the U-shaped frame and is driven to the fourth motor. The fourth motor is arranged on the bottom surface of the U-shaped frame, and the bristle sleeve is arranged on the second rotating shaft.

7. The electric porcelain insulator with overheat protection according to claim 1, characterized in that: The driving mechanism includes a fifth motor, a driving gear and a driven gear. The fifth motor is arranged on the top surface of the box body, and its output shaft is provided with a driving gear. The driven gear is sleeved on the lower end of the electric porcelain insulator, and the driven gear is meshed with the driving gear.

8. The electric porcelain insulator with overheat protection according to claim 1, characterized in that: It also includes a water collecting pan, which is arranged on the top surface of the box body and below the electric porcelain insulator. A water return hole is arranged at the bottom of the water collecting pan, and the water return hole is communicated with the box body.

9. The electric porcelain insulator with overheat protection according to claim 1, characterized in that: It also includes a distance sensor, which is arranged on the bottom surface of the support plate and is electrically connected to the controller.

10. The electric porcelain insulator with overheat protection according to claim 1, characterized in that: It also includes an outer bearing, which is sleeved on the bottom end of the electric porcelain insulator, and the electric porcelain insulator is rotatably arranged on the top of the box body through the outer bearing.

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