阅读说明：本技术 一种自动断电灭火的充电桩保护系统 (Automatic electric pile protection system that fills of outage fire extinguishing ) 是由 胡延伟 于 2021-07-27 设计创作，主要内容包括：发明属于充电桩防护领域,为一种自动断电灭火的充电桩保护系统,一种自动断电灭火的充电桩保护系统,包括壳体,所述壳体左侧设有充电桩,所述充电桩内设有自动断电腔,所述自动断电腔内设有自动断电装置,自动断电装置用于充电桩着火时自动切断电路,所述充电桩内设有自动灭火腔,所述自动灭火腔内设有自动灭火装置,自动灭火装置用于对充电桩内部进行灭火。本发明能自动检测充电桩内部的温度并采用风扇和装有软管的漏斗对充电桩进行有效散热,当检测到高温时,卡紧装置复位时会实现高温自动脱落插头的功能,当充电桩着火时,自动断电装置能首先切断电路,自动灭火装置能对充电桩进行灭火材料的释放。(The invention belongs to the field of charging pile protection, and relates to an automatic power-off fire-extinguishing charging pile protection system which comprises a shell, wherein a charging pile is arranged on the left side of the shell, an automatic power-off cavity is arranged in the charging pile, an automatic power-off device is arranged in the automatic power-off cavity and used for automatically cutting off a circuit when the charging pile catches fire, an automatic fire-extinguishing cavity is arranged in the charging pile, an automatic fire-extinguishing device is arranged in the automatic fire-extinguishing cavity and used for extinguishing fire in the charging pile. The automatic fire extinguishing device can automatically detect the temperature in the charging pile and effectively dissipate heat of the charging pile by adopting the fan and the funnel with the hose, when high temperature is detected, the function of automatically dropping the plug at high temperature can be realized when the clamping device is reset, when the charging pile is on fire, the automatic power-off device can firstly cut off the circuit, and the automatic fire extinguishing device can release fire extinguishing materials for the charging pile.)

1. The utility model provides an automatic electric pile protection system that fills of outage fire-fighting, includes casing (10), its characterized in that, casing ((10)), including casing (10), casing (10) left side is equipped with fills electric pile (32), be equipped with automatic power off chamber (12) in filling electric pile (32), be equipped with automatic power off device in automatic power off chamber (12), automatic power off device is used for filling the automatic cutout circuit when electric pile catches fire, be equipped with automatic fire extinguishing chamber (18) in filling electric pile (32), be equipped with automatic fire extinguishing device in automatic fire extinguishing chamber (18), automatic fire extinguishing device is used for putting out a fire to filling electric pile inside.

2. The automatic power-off fire-extinguishing charging pile protection system according to claim 1, characterized in that: the automatic fire extinguishing device comprises a temperature sensor (46) fixed on the left side wall and the right side wall of an automatic fire extinguishing cavity (18), a truss (50) is arranged on the left side wall and the right side wall of the automatic fire extinguishing cavity (18) in a sliding mode, the temperature sensor (46) controls the truss (50) to move downwards, two ejector rods (48) which are bilaterally symmetrical are fixedly arranged on the lower side wall of the truss (50), a grating (44) is fixedly arranged on the lower side wall of the automatic fire extinguishing cavity (18), two L-shaped rods (45) which are bilaterally symmetrical are fixedly arranged on the rear side wall of the automatic fire extinguishing cavity (18), a cross rod used for sealing a space formed by the L-shaped rods (45) and the automatic fire extinguishing cavity (18) is hinged to the lower side wall of each L-shaped rod (45), a fire extinguishing material is arranged in the space, the fire extinguishing material is ammonium dihydrogen phosphate, a first motor (49) is fixedly arranged on the truss (50), rotate on the output of first motor (49) and be equipped with fan axle (43), fan axle (43) lower extreme is fixed and is equipped with fan (42), the lateral wall rotates and is equipped with fan connecting rod (17) under fan (42), fan connecting rod (17) with fill the rear wall sliding connection of electric pile (32), fixed rack (27) that are equipped with on fan connecting rod (17), it is equipped with primary shaft (26) to rotate on fan connecting rod (17), primary shaft (26) right-hand member is fixed and is equipped with funnel (16), fan connecting rod (17) and funnel (16) carry out the transmission through gear (52) and rack (27), and funnel (16) downside is equipped with hose (15).

3. The automatic power-off fire-extinguishing charging pile protection system according to claim 2, characterized in that: the automatic power-off device comprises a second motor (25) fixed on the left side wall of an automatic power-off cavity (12), an outer shaft (28) is arranged on the output end of the second motor (25), the inner wall of the outer shaft (28) is provided with a spiral groove, a slider connecting rod (29) is arranged in the outer shaft (28) in a sliding manner, a slider is fixedly arranged on the slider connecting rod (29), the slider on the slider connecting rod (29) slides in the groove of the outer shaft (28), a switch (30) is arranged on the right side of the automatic power-off cavity (12), the slider connecting rod (29) stretches out to the right to touch the switch (30), a power supply (11) is fixedly arranged on the lower side wall of a charging pile (32), the automatic power-off cavity (12) is connected with the power supply (11) through an electric wire, a wire collecting cavity (13) is fixedly arranged on the right side wall of the charging pile (32), and a wire collecting device is arranged in the wire collecting cavity (13), the take-up device is used for automatically contracting the cable of the movable plug.

4. The automatic power-off fire-extinguishing charging pile protection system according to claim 3, characterized in that: take-up includes receive line chamber (13) center and rotate second shaft (31) that are equipped with, second shaft (31) pass through torsional spring with receiving line chamber (13) inner wall and connect, receive the electric wire in line chamber (13) and fill electric pile right side wall and be connected through first spring (47), receive line chamber (13) and pass through the connection of electric lines with socket chamber (24), be equipped with chucking device in socket chamber (24), chucking device is used for preventing that the charger is stolen and the high temperature automatic charging plug that drops.

5. The automatic power-off fire-extinguishing charging pile protection system according to claim 4, characterized in that: chucking device is including fixed setting two U-shaped groove (23) of socket chamber (24) upside longitudinal symmetry, every it is equipped with slider (51) to slide in U-shaped groove (23), slider (51) and U-shaped groove (23) inslot lateral wall are connected with second spring (20), it is equipped with movable rod (21) to slide on socket chamber (24) right side wall, movable rod (21) right side is fixed and is equipped with electro-magnet (22), movable rod (21) are connected through third spring (14) with chucking device.

6. The automatic power-off fire-extinguishing charging pile protection system according to claim 5, characterized in that: fill electric pile (32) right side wall and fix and be equipped with ammeter case (39), fixed display screen (54) that is equipped with is gone up in ammeter case (39), the fixed third motor (19) that is equipped with on ammeter case (39) left side wall, it is equipped with third axle (33) to rotate on the output of third motor (19), third axle (33) rotate with first circular cavity (40) and are connected, third axle (33) right-hand member is fixed and is equipped with thing piece (53), thing piece (53) right-hand member is fixed and is equipped with symmetrical horizontal pole (36), first circular cavity (40) internal rotation is equipped with second circular cavity (38), fixed dead lever (35) that is equipped with on second circular cavity (38), dead lever (35) are in slide in the space that symmetrical horizontal pole (36) formed, be equipped with rectangular channel (41) on first circular cavity (40).

Technical Field

The invention belongs to the field of charging pile protection, and particularly relates to a charging pile protection system capable of automatically cutting off power and extinguishing fire.

Background

The charging pile has the functions similar to an oiling machine in a gas station, can be fixed on the ground or on the wall, is installed in public buildings, markets, public parking lots, residential area parking lots or charging stations, can charge electric vehicles of various types according to different voltage grades, can generate a large amount of heat when the charging pile works, can consume internal electric appliances and even cause fire if the heat cannot be dissipated timely, and can consume internal electric appliances, and fire fighters need a certain time to reach a fire scene, and the outer cover of the charging pile is opened to increase air flame retardance, so that the fire is more and more intense and difficult to control, a display screen of a charging pile ammeter box can display data such as charging quantity, cost, charging time and the like, and the charging pile is usually arranged outdoors in daily life, but the ammeter box placed outdoors has the great defect and is easily influenced by sunlight exposure, especially in areas with high temperature in summer, the sunlight is exposed for a long time, so that the internal circuit is aged and leakage accidents are easy to happen.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides an automatic power-off fire-extinguishing charging pile protection system.

The purpose of the invention can be realized by the following technical scheme: the utility model provides an automatic cut-off is put out a fire fills electric pile protection system, includes the casing, the casing left side is equipped with fills electric pile, be equipped with the auto-power-off chamber in filling electric pile, the auto-power-off intracavity is equipped with automatic power-off device, and automatic power-off device is used for filling the electric pile automatic cutout circuit when catching fire, it is equipped with the automatic chamber of putting out a fire in the electric pile to fill, the automatic intracavity of putting out a fire is equipped with automatic fire extinguishing device, and automatic fire extinguishing device is used for putting out a fire to filling electric pile inside.

Preferably, the automatic fire extinguishing device comprises temperature sensors fixed on the left side wall and the right side wall of the automatic fire extinguishing cavity, trusses are arranged on the left side wall and the right side wall of the automatic fire extinguishing cavity in a sliding mode, the temperature sensors control the trusses to move downwards, two ejector rods which are bilaterally symmetrical are fixedly arranged on the lower side wall of the trusses, a grid is fixedly arranged on the lower side wall of the automatic fire extinguishing cavity, two L-shaped rods which are bilaterally symmetrical are fixedly arranged on the rear side wall of the automatic fire extinguishing cavity, a cross rod for sealing a space formed by the L-shaped rods and the automatic fire extinguishing cavity is hinged to the lower side wall of each L-shaped rod, a fire extinguishing material is filled in the space, the fire extinguishing material is ammonium dihydrogen phosphate, a first motor is fixedly arranged on the trusses, a fan shaft is rotatably arranged on the output end of the first motor, a fan is fixedly arranged at the lower end of the fan shaft, a fan connecting rod is rotatably arranged on the lower side wall of the fan, the utility model discloses a fan charging pile, including electric pile, fan connecting rod, charging pile's rear side wall sliding connection, the fixed rack that is equipped with on the fan connecting rod, the rotation is equipped with the primary shaft on the fan connecting rod, the fixed funnel that is equipped with of primary shaft right-hand member, the fan connecting rod passes through gear and rack with the funnel and transmits, and the funnel downside is equipped with the hose.

Preferably, the automatic power-off device is including fixing the second motor on the automatic power-off chamber left side wall, be equipped with outer axle on the output of second motor, outer axle inner wall is equipped with the spiral groove, outer epaxial slip is equipped with the slider connecting rod, the fixed slider that is equipped with on the slider connecting rod, slider on the slider connecting rod slides in outer axle recess, automatic power-off chamber right side is equipped with the switch, the slider connecting rod stretches out right and can touch switch, fill the fixed power that is equipped with of electric pile lower side wall, the automatic power-off chamber passes through electric wire connection with the power, fill the fixed receipts line chamber that is equipped with on the electric pile right side wall, it is equipped with take-up to receive the line intracavity, and take-up is used for the cable conductor of automatic contraction movable plug.

Preferably, take-up includes receive line chamber center and rotate the second shaft that is equipped with, the second shaft passes through torsional spring with receiving line intracavity wall and is connected, receive the electric wire of line intracavity and fill electric pile right side wall through first spring coupling, receive the line chamber and pass through the connection of electric lines with the socket chamber, the socket intracavity is equipped with chucking device, and chucking device is used for preventing that the charger is stolen and the automatic charging plug that drops of high temperature.

Preferably, the clamping device is including fixed setting two U-shaped grooves of socket chamber upside longitudinal symmetry, every it is equipped with the slider to slide in the U-shaped groove, slider and U-shaped inslot lateral wall are connected with the second spring, it is equipped with the movable rod to slide on the socket chamber right side wall, the fixed electro-magnet that is equipped with in movable rod right side, the movable rod passes through third spring coupling with clamping device.

Preferably, fill the fixed ammeter case that is equipped with of electric pile right side wall, the fixed display screen that is equipped with on the ammeter case, the fixed third motor that is equipped with on the ammeter case left side wall, it is equipped with the third axle to rotate on the output of third motor, the third axle rotates with first circular cavity and is connected, the fixed thing piece that is equipped with of third axle right-hand member, the fixed symmetrical horizontal pole that is equipped with of thing piece right-hand member, first circular cavity internal rotation is equipped with the circular cavity of second, the fixed dead lever that is equipped with on the circular cavity of second, the dead lever is in slide in the space that the symmetrical horizontal pole formed, be equipped with the rectangular channel on the first circular cavity.

When the plug inserts the socket, first motor start-up fan rotates, and the fan moves and fills the interior hot-blast air outlet discharge that gets into the hose with the heat from the socket chamber of funnel entering of electric pile, reduces the inside temperature of filling electric pile, is favorable to improving the radiating efficiency who fills electric pile, and then improves the life who fills the inside device of electric pile.

Meanwhile, a sensor is started, the sensor controls the electromagnet to suck the plug, the movable rod moves leftwards under the pushing of the plug and pushes the sliding block to move upwards in the U-shaped groove, the movable rod is clamped under the action of the sliding block, the plug is adsorbed on the socket, the charger and the charger anti-theft function are prevented from being maliciously pulled out, when the temperature sensor detects a high-temperature state, the sliding block resets under the action of the second spring under the control of the sensor, the movable rod moves rightwards under the action of the piston spring, the electromagnet stops working, the plug is popped out, the function of automatically dropping the plug at a high temperature is achieved, and the charger is prevented from being damaged.

Socket chamber can extend and automatic withdrawal under the effect of first spring, and socket chamber can extend during charging, and convenient remote charging finishes charging, and the electric wire is automatic to be taken in with the electric wire under the effect of first spring and receives the line chamber, twines the electric wire in receiving the line intracavity under the effect of torsional spring, the life of extension cable.

When filling electric pile and catching fire, second motor control slider connecting rod slides touch switch right in the outer axle, make the switch disconnection, realize filling electric pile auto-power-off function that catches fire, temperature sensor control truss downstream, make the ejector pin push down L shape pole, spill fire-extinguishing material from the grid, fan downstream drives rack and gear and carries out the transmission simultaneously, make the funnel degree of progress upset under the transmission of primary shaft, present the shape of falling the funnel, the lateral wall that passes through the funnel with the material that spills in the grid scatters, increase the area of putting out a fire, improve the efficiency of putting out a fire, avoid the intensity of a fire aggravation to cause further injury.

The electric meter box fixed on the charging pile can observe the charging condition of the charging pile through the display screen, the third motor is started to drive the third shaft to rotate, the third shaft moves up and down in the hole groove, the fixed symmetrical transverse rod on the third shaft drives the fixed rod fixed on the second circular cavity to slide in the symmetrical transverse rod, the fixed rod drives the second circular cavity to rotate upwards, the brush installed at the narrow part at the upper end of the second circular cavity covers and cleans dust on the display screen, the device effectively overcomes the problem that the electric meter box is aged due to sunlight exposure, the service life of the electric meter box can be better prolonged, and the dust accumulated inside the display screen for a long time is cleaned, and the display of the electric meter box can be clearly watched.

Compared with the prior art, this electric pile protection system that fills who puts out a fire automatically cuts off power supply has following advantage:

1. fill electric pile inside temperature when high, the fan will be hot-blast from the funnel get into the hose with the heat from the air outlet discharge, reduce the inside temperature of filling electric pile, be favorable to improving the radiating efficiency who fills electric pile, and then improve the life who fills electric pile inside device.

2. When high temperature is detected, the plug is popped out, the function of automatically dropping the plug at high temperature is realized, and the charger is prevented from being damaged.

3. When detecting to fill electric pile and firing, the fire extinguishing material disperses through the funnel lateral wall and releases inside filling electric pile, increases the area of putting out a fire, improves fire extinguishing efficiency, avoids the intensity of a fire aggravation to cause further injury.

Drawings

Fig. 1 is a schematic structural diagram of a charging pile protection system with automatic power-off and fire-extinguishing functions.

Fig. 2 is a sectional view taken along a line a-a in fig. 1.

Fig. 3 is an enlarged view of the structure at B in fig. 1.

Fig. 4 is an enlarged view of the structure at C in fig. 1.

Fig. 5 is an enlarged view of the structure at D in fig. 1.

FIG. 6 is a sectional view taken in the direction E-E of FIG. 5

Fig. 7 is a sectional view taken in the direction F-F in fig. 6.

In the figure, 10, the housing; 11. a power source; 12. an automatic power-off device; 13. a take-up device; 14. a third spring; 15. a hose; 16. a funnel; 17. a fan connecting rod; 18. an automatic fire extinguishing device; 19. a third motor; 20. A second spring; 21. a movable rod; 22. a magnet; 23. a U-shaped groove; 24. a socket cavity; 25. a second motor; 26. a first shaft; 27. a rack; 28. an outer shaft; 29. a slider connecting rod; 30. a switch; 31. a second shaft; 32. Charging piles; 33. a third axis; 34. a hole groove; 35. fixing the rod; 36. a cross bar; 37. a sensor; 38. a second circular cavity; 39. an electric meter box; 40. a first circular cavity; 41. a rectangular groove; 42. a fan; 43. a fan shaft; 44. a grid; 45. an L-shaped rod; 46. a temperature sensor; 47. a first spring; 48. a top rod; 49. A first motor; 50. a truss; 51. a slider; 52. a gear; 53. a material block; 54. a display screen.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in figure 1, an automatic power-off fire-extinguishing charging pile protection system comprises a shell 10, wherein a charging pile 32 is arranged on the left side of the shell 10, an automatic power-off cavity 12 is arranged in the charging pile 32, an automatic power-off device is arranged in the automatic power-off cavity 12, the automatic power-off device is used for automatically cutting off a circuit when the charging pile catches fire, an automatic fire-extinguishing cavity 18 is arranged in the charging pile 32, an automatic fire-extinguishing device is arranged in the automatic fire-extinguishing cavity 18, and the automatic fire-extinguishing device is used for extinguishing fire inside the charging pile.

As shown in fig. 1, 2 and 4, the automatic fire extinguishing apparatus includes a temperature sensor 46 fixed on the left and right side walls of the automatic fire extinguishing chamber 18, a truss 50 is slidably disposed on the left and right side walls of the automatic fire extinguishing chamber 18, the temperature sensor 46 controls the truss 50 to move downward, two ejector rods 48 are fixed on the lower side wall of the truss 50, a grid 44 is fixed on the lower side wall of the automatic fire extinguishing chamber 18, two L-shaped rods 45 are fixed on the rear side wall of the automatic fire extinguishing chamber 18, a cross rod is hinged on the lower side wall of each L-shaped rod 45 for sealing a space formed by the L-shaped rod 45 and the automatic fire extinguishing chamber 18, a fire extinguishing material is filled in the space, the fire extinguishing material is ammonium dihydrogen phosphate, a first motor 49 is fixed on the truss 50, a fan shaft 43 is rotatably disposed on the output end of the first motor 49, a fan 42 is fixed at the lower end of the fan shaft 43, a fan connecting rod 17 is rotatably disposed on the lower side wall of the fan 42, fan connecting rod 17 and the rear side wall sliding connection who fills electric pile 32, the fixed rack 27 that is equipped with on the fan connecting rod 17, rotate on the fan connecting rod 17 and be equipped with primary shaft 26, and primary shaft 26 right-hand member is fixed and is equipped with funnel 16, and fan connecting rod 17 and funnel 16 carry out the transmission through gear 52 and rack 27, and funnel 16 downside is equipped with hose 15.

As shown in fig. 1 and 3, the automatic power-off device comprises a second motor 25 fixed on the left side wall of an automatic power-off cavity 12, an outer shaft 28 is arranged on the output end of the second motor 25, the inner wall of the outer shaft 28 is provided with a spiral groove, a slider connecting rod 29 is arranged in the outer shaft 28 in a sliding manner, a slider is fixedly arranged on the slider connecting rod 29 and slides in the groove of the outer shaft 28, a switch 30 is arranged on the right side of the automatic power-off cavity 12, the slider connecting rod 29 stretches out rightwards to be capable of touching the switch 30, a power supply 11 is fixedly arranged on the lower side wall of a charging pile 32, the automatic power-off cavity 12 is connected with the power supply 11 through an electric wire, a wire collecting cavity 13 is fixedly arranged on the right side wall of the charging pile 32, a wire collecting device is arranged in the wire collecting cavity 13, and the wire collecting device is used for automatically contracting a cable of a movable plug.

As shown in fig. 1, the wire rewinding device comprises a second shaft 31 rotatably arranged at the center of a wire rewinding cavity 13, the second shaft 31 is connected with the inner wall of the wire rewinding cavity 13 through a torsion spring, an electric wire in the wire rewinding cavity 13 is connected with the right side wall of a charging pile through a first spring 47, the wire rewinding cavity 13 is connected with a socket cavity 24 through an electric wire, and a clamping device is arranged in the socket cavity 24 and used for preventing the charger from being stolen and preventing the charging plug from automatically falling off at high temperature.

As shown in fig. 1, the clamping device includes two U-shaped grooves 23 which are fixedly arranged on the upper side of the socket cavity 24 and are symmetrical up and down, a sliding block 51 is arranged in each U-shaped groove 23 in a sliding manner, the inner side walls of the sliding block 51 and the U-shaped groove 23 are connected with a second spring 20, a movable rod 21 is arranged on the right side wall of the socket cavity 24 in a sliding manner, an electromagnet 22 is fixedly arranged on the right side of the movable rod 21, and the movable rod 21 is connected with the clamping device through a third spring 14.

As shown in fig. 1, fig. 5, fig. 6, fig. 7, it is fixed with ammeter case 39 to fill electric pile 32 right side wall, the last fixed display screen 54 that is equipped with of ammeter case 39, fixed third motor 19 that is equipped with on the ammeter case 39 left side wall, it is equipped with third axle 33 to rotate on third motor 19's the output, third axle 33 rotates with first circular cavity 40 and is connected, the fixed thing piece 53 that is equipped with in third axle 33 right-hand member, the fixed symmetry horizontal pole 36 that is equipped with in thing piece 53 right-hand member, first circular cavity 40 internal rotation is equipped with second circular cavity 38, the fixed dead lever 35 that is equipped with on the second circular cavity 38, dead lever 35 slides in the space that symmetry horizontal pole 36 formed, be equipped with rectangular channel 41 on the first circular cavity 40.

When the plug inserts the socket, first motor 49 starts fan 42 and rotates, and the fan moves the hot-blast air that fills in the electric pile and gets into hose 15 from funnel 16 and discharge the heat from the air outlet of socket chamber 24, reduces the inside temperature of electric pile that fills, is favorable to improving the radiating efficiency who fills electric pile, and then improves the life who fills the inside device of electric pile.

Meanwhile, the sensor 37 is started, the sensor 37 controls the electromagnet 22 to suck the plug, the movable rod 21 moves leftwards under the pushing of the plug, the movable rod 21 pushes the sliding block 51 to move upwards in the U-shaped groove 23, the movable rod 21 is clamped under the action of the sliding block 51, the plug is adsorbed on the socket, the charger and the anti-theft function of the charger are prevented from being maliciously pulled out, when the temperature sensor 46 detects a high-temperature state, the sliding block 51 resets under the control of the sensor 37 under the action of the second spring 20, the movable rod 21 moves rightwards under the action of the piston spring 14, the electromagnet 22 stops working, the plug is ejected out, the function of automatically dropping the plug at high temperature is achieved, and the charger is prevented from being damaged.

Socket chamber 24 can extend and automatic withdrawal under the effect of first spring 47, and socket chamber 24 can extend during the charging, and convenient remote charging finishes the back of charging, and the electric wire is automatic to be taken in with the electric wire under the effect of first spring 47 and receives the line chamber 13, twines the electric wire in receiving the line chamber 13 under the effect of torsional spring, the life of extension cable.

When charging pile catches fire, second motor 25 control slider connecting rod 29 slides touch switch 30 to the right in outer axle 28, make switch 30 break off, realize charging pile auto-power-off function that catches fire, temperature sensor 46 control truss 50 moves down, make ejector pin 48 push down L shape pole 45, spill fire extinguishing material from grid 44, fan 42 moves down simultaneously and drives rack 27 and gear 52 and carry out the transmission, make funnel 16 carry out 180 degrees upsets under the transmission of primary shaft 26, the shape of the funnel that appears, the material that spills in grid 44 disperses through the lateral wall of funnel 16, increase the area of putting out a fire, improve fire extinguishing efficiency, avoid the intensity of a fire to cause further injury.

Fix and to fill electric pile's the circumstances of charging of electric meter box 39 through the display screen 54 observable, start third motor 19 and drive third axle 33 and rotate, third axle 33 reciprocates in hole groove 34, fixed symmetry horizontal pole 36 drives the dead lever 35 of fixing on second circular cavity 38 and slides in symmetry horizontal pole 36 on third axle 33, dead lever 35 drives second circular cavity 38 and upwards rotates, the brush of the installation of the narrow part in second circular cavity 38 upper end covers and clears up the dust display screen 54, the effectual circuit ageing of having overcome the electric meter box because of sunlight insolate causes of the device, the life of extension electric meter box that can be better, and clear up the inside long-term dust that accumulates of display screen 54, be favorable to the clear demonstration of watching the electric meter box.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.