Anti-icing cover and anti-icing method for on-line monitoring equipment of transmission lines

Abstract

An anti-icing cover and anti-icing method for on-line monitoring equipment of transmission lines. There are multiple electric telescopic rods on the installation substrate. The electric telescopic rods are fixedly connected to the installation substrate and the telescopic ends penetrate to the lower end of the installation substrate. A flexible anti-icing cover body is arranged below the installation substrate. The end of the telescopic end of the electric telescopic rod is connected to the lower end of the flexible anti-icing cover body. The space inside the flexible anti-icing cover body is used to place the equipment to be protected. The on-site meteorological environment is monitored by a temperature controller and a rain and snow sensor. Judgments and automatic controls are carried out through a PLC programmable control logic circuit according to the monitoring data. Actions such as automatic umbrella opening protection, automatic heating for ice removal, and automatic umbrella closing and resuming operation can be performed to ensure that the equipment to be protected is not invaded by rain, snow and freezing, and can still be restored to operation in a timely and rapid manner at critical moments; the installation method of this technical solution is simple, with a high degree of automation, low energy consumption, can share the battery with the on-line monitoring equipment, can be designed and installed together with the relevant on-line monitoring equipment of the transmission line, and put into operation at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary equipment for power transmission equipment, and particularly relates to an ice-proof cover and an ice-proof method for on-line monitoring equipment of transmission lines. Background Art

[0002] To ensure the safe operation of transmission lines, many on-line monitoring devices such as image monitoring, video monitoring, micro-meteorological monitoring, tower inclination monitoring, and icing monitoring have been installed in existing transmission lines. The power supply of on-line monitoring devices generally adopts wind-solar complementary, that is, the wind energy is converted into electric energy through a wind turbine, and at the same time, the light energy is converted into electric energy through a solar panel.

[0003] Devices such as image monitoring and video monitoring are vulnerable to icing in rainy, snowy and freezing weather, resulting in abnormal operation and inability to conduct on-site image monitoring, as shown in Figure 1 and Figure 2 ; After the wind turbine and the solar panel are iced, they cannot work properly and cannot generate electricity, thus affecting the normal operation of the powered on-line monitoring devices. And after the weather improves, due to the long natural de-icing time, the devices cannot resume normal operation as soon as possible. In addition, when water freezes, its volume expands, which may cause mechanical damage to some structures of on-line monitoring devices exposed to rain and snow, thus affecting normal operation.

[0004] During the annual cold snap and rainy, snowy and freezing period, the line operation and maintenance units have a more urgent need for the normal operation of on-line monitoring devices, and hope to obtain technical parameters and on-site scenes through on-line monitoring devices for line operation and maintenance guarantee. Therefore, it is particularly important to effectively protect on-line monitoring devices of transmission lines during the rainy, snowy and freezing period. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an ice-proof cover and an ice-proof method for on-line monitoring devices of transmission lines, which can prevent rain and snow from attacking the devices and freezing, avoid the abnormal operation of the wind turbine due to being frozen by ice and snow, and avoid the abnormal operation of image monitoring and video monitoring cameras due to being frozen by rain and snow.

[0006] To solve the above technical problem, the technical solution adopted by the present invention is:

[0007] An ice-proof cover for on-line monitoring devices of transmission lines includes a mounting substrate. A plurality of electric telescopic rods are provided on the mounting substrate. The electric telescopic rods are fixedly connected to the mounting substrate and the telescopic ends penetrate to the lower end of the mounting substrate. A flexible ice-proof cover body is provided below the mounting substrate. The end of the telescopic end of the electric telescopic rod is connected to the lower end of the flexible ice-proof cover body. The space inside the flexible ice-proof cover body is used to place the protected device.

[0008] A control box is provided on the above-mentioned mounting substrate. A controller is provided inside the control box. The input end of the controller is electrically connected to a rain and snow sensor and a temperature sensor outside the control box. The output end of the controller controls the telescopic movement of the electric telescopic rod.

[0009] The above-mentioned flexible anti-icing cover has a cylindrical shape. The top of the flexible anti-icing cover is fixedly connected to the lower surface of the mounting substrate. The lower end of the flexible anti-icing cover is open for the equipment to be protected to be exposed. A plurality of fixed steel rings connected to the cover are provided up and down on the column of the flexible anti-icing cover. The end of the telescopic end of the electric telescopic rod is connected to the fixed steel ring at the lower end of the flexible anti-icing cover.

[0010] A hook body is provided at the end of the telescopic end of the above-mentioned electric telescopic rod, and the hook body hooks the fixed steel ring at the lower end of the flexible anti-icing cover.

[0011] The above-mentioned fixed steel ring is connected to the flexible anti-icing cover through evenly distributed nylon rings, and the upper and lower nylon rings are in corresponding positions and are connected together by wires.

[0012] The above-mentioned flexible anti-icing cover is made of double-layer umbrella cloth. The outer layer of the double-layer umbrella cloth is polyester fiber, and the inner layer of the double-layer umbrella cloth is graphene heating cloth, and the graphene heating cloth is controlled by the controller to generate heat.

[0013] The top of the above-mentioned flexible anti-icing cover is a disc-shaped graphene heating base cloth. The upper surface of the graphene heating base cloth is fixedly connected to the lower surface of the mounting substrate. The lower end of the graphene heating base cloth is connected to the double-layer cylindrical cover and the graphene heating base cloth is electrically connected and conducted with the graphene heating cloth on the inner layer of the cover.

[0014] An anti-hanging embedding shell is provided at the edge of the above-mentioned mounting substrate, and the anti-hanging embedding shell wraps and fixes the edges of the mounting substrate and the graphene heating base cloth.

[0015] Mounting angle steels are fixedly connected to the above-mentioned mounting substrate, and the mounting angle steels are used to install and fix the entire anti-icing device.

[0016] Using the above-mentioned anti-icing method for an anti-icing cover of an on-line monitoring device for a transmission line, including:

[0017] When the rain and snow sensor and the temperature sensor detect that the temperature is higher than -1°C or there is no rain or snow, it is judged as normal weather conditions. At this time, the controller controls the electric telescopic rod to be in the retracted state, drives the flexible anti-icing cover to be retracted, and the equipment to be protected is exposed and can work normally;

[0018] When it is detected that the temperature is lower than -1°C and there is rain and snow at the same time, the controller starts the umbrella-opening action. Multiple electric telescopic rods extend simultaneously to push the fixed steel ring at the bottom, so that the double-layer umbrella cloth unfolds downward to cover the equipment to be protected and prevent it from being invaded by rain, snow and freezing;

[0019] When the monitored temperature is higher than -1°C, or no rain, snow or sleet is detected on site, the controller starts the umbrella retraction operation. Multiple electric telescopic rods contract simultaneously, dragging the double-layer umbrella cloth upwards to retract, so that the protected equipment is no longer covered and returns to the working state;

[0020] When the monitored temperature is higher than -1°C and rain, snow or sleet is detected on site, the controller first powers on the graphene heating cloth for 5 minutes to heat the umbrella cloth, melt the ice and snow so that the ice and snow fall off from the double-layer umbrella cloth and the circular plate platform, and then starts the umbrella retraction operation. Multiple telescopic rods contract simultaneously, dragging the double-layer umbrella cloth upwards to retract, so that the protected equipment is no longer covered and returns to the working state.

[0021] An ice protection cover and ice protection method for an on-line monitoring device of a transmission line provided by the present invention monitor the on-site meteorological environment through a temperature controller and a rain, snow and sleet sensor, and make judgments and automatic controls through a PLC programmable control logic circuit according to the monitored data. It can perform actions such as automatic umbrella opening protection, automatic heating and deicing, and automatic umbrella retraction and resumption of operation, ensuring that the protected on-line monitoring device is not invaded by rain, snow and sleet and can still resume operation promptly and quickly at critical moments; this technical solution has the advantages of simple installation method, high automation degree, low energy consumption, etc., and can share the storage battery with the on-line monitoring device. It can be designed and installed together with relevant on-line monitoring devices of transmission lines and put into operation simultaneously. Description of the Drawings

[0022] The present invention will be further described below with reference to the drawings and embodiments:

[0023] Figure 1 Schematic diagram of an on-line monitoring device covered with ice and snow;

[0024] Figure 2 Schematic diagram of a camera covered with ice and snow;

[0025] Figure 3 Device state after starting ice protection;

[0026] Figure 4 Device state before starting ice protection;

[0027] Figure 5 Top view of the ice protection cover;

[0028] Figure 6 Schematic diagram of the structure of the flexible ice protection cover body;

[0029] Figure 7 Control logic circuit diagram of the rain, snow and sleet sensor;

[0030] Figure 8 Control logic circuit diagram of the temperature sensor;

[0031] Figure 9 Schematic diagram of the connection of the controller;

[0032] Figure 10 It is a schematic diagram of the lifting connection circuit;

[0033] Figure 11 It is a schematic diagram of the circuit connection of the graphene heating cloth.

[0034] In the figure: mounting substrate 100, mounting angle steel 120, protective umbrella cloth 210, solid steel ring 220, hook body 230, anti-hanging inlay shell 240, nylon ring 250, electric telescopic rod 300, control box 400, controller 401, connection circuit 402, temperature control circuit 403, rain and snow sensor 410, temperature sensor 420, graphene heating base cloth 500, equipment to be protected 600. Detailed implementation mode

[0035] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0036] As Figures 3 - 6 shown in, an ice protection cover for an on-line monitoring device of a transmission line includes a mounting substrate 100. A plurality of electric telescopic rods 300 are provided on the mounting substrate 100. The electric telescopic rods 300 are fixedly connected to the mounting substrate 100 and the telescopic ends penetrate to the lower end of the mounting substrate 100. A flexible ice protection cover body is provided below the mounting substrate 100. The end of the telescopic end of the electric telescopic rod 300 is connected to the lower end of the flexible ice protection cover body. The space inside the flexible ice protection cover body is used to place the equipment to be protected 600.

[0037] A control box 400 is provided on the above-mentioned mounting substrate 100. A controller 401 is provided inside the control box 400. The input end of the controller 401 is electrically connected to the rain and snow sensor 410 and the temperature sensor 420 outside the control box 400. The output end of the controller 401 controls the telescopic movement of the electric telescopic rod 300.

[0038] The controller 401 includes an OHR-PR10 type PLC programmable controller, which is a Chinese all-in-one machine and performs automatic control according to a preset program.

[0039] The above-mentioned flexible ice protection cover body has a cylindrical shape. The top of the flexible ice protection cover body is fixedly connected to the lower surface of the mounting substrate 100. The lower end opening of the flexible ice protection cover body is used for the equipment to be protected 600 to be exposed. A plurality of solid steel rings 220 connected to the cover body are provided up and down on the column body of the flexible ice protection cover body. The end of the telescopic end of the electric telescopic rod 300 is connected to the solid steel ring 220 at the lower end of the flexible ice protection cover body.

[0040] A hook body 230 is provided at the end of the telescopic end of the above-mentioned electric telescopic rod 300. The hook body 230 hooks the solid steel ring 220 at the lower end of the flexible ice protection cover body.

[0041] The above-mentioned solid steel ring 220 is connected to the flexible anti-icing cover through nylon rings 250 evenly distributed in a circular manner, and the upper and lower nylon rings 250 are in corresponding positions and are connected together by wires.

[0042] The above-mentioned flexible anti-icing cover is a double-layer umbrella cloth. The outer layer of the double-layer umbrella cloth is made of polyester fiber, and the inner layer is a graphene heating cloth, which is controlled by a controller 401 to generate heat.

[0043] The top of the above-mentioned flexible anti-icing cover is a disc-shaped graphene heating base cloth 500. The upper surface of the graphene heating base cloth 500 is fixedly connected to the lower surface of the mounting substrate 100. The lower end of the graphene heating base cloth 500 is connected to a double-layer cylindrical cover, and the graphene heating base cloth 500 is electrically connected and conducted with the graphene heating cloth on the inner layer of the cover.

[0044] The edge of the above-mentioned mounting substrate 100 is provided with an anti-hanging embedding shell 240, which wraps and fixes the edges of the mounting substrate 100 and the graphene heating base cloth 500.

[0045] The above-mentioned mounting substrate 100 is provided with a fixedly connected mounting angle steel 120, which is used to install and fix the entire anti-icing device.

[0046] Using the above-mentioned anti-icing method for an anti-icing cover of an on-line monitoring device for transmission lines, including:

[0047] When the rain and snow sensor 410 and the temperature sensor 420 detect that the temperature is higher than -1°C or there is no rain or snow satisfying one of them, it is judged as normal meteorological conditions. At this time, the controller 401 controls the electric telescopic rod 300 to be in the retracted state, driving the flexible anti-icing cover to be retracted, and the protected device 600 is exposed and can work normally;

[0048] When it is detected that the temperature is lower than -1°C and there is rain and snow at the same time, the controller 401 starts the umbrella-opening action. Multiple electric telescopic rods 300 extend simultaneously to push the bottom solid steel ring 220, so that the double-layer umbrella cloth unfolds downward, covering the protected device 600 to prevent it from being invaded by rain, snow and ice;

[0049] When it is detected that the temperature is higher than -1°C, or no rain or snow is detected on site, the controller 401 starts the umbrella-closing action. Multiple electric telescopic rods 300 contract simultaneously, dragging the double-layer umbrella cloth to be retracted upward, so that the protected device 600 is no longer covered and returns to the working state;

[0050] When it is detected that the temperature is higher than -1°C and rain, snow and ice are detected on site, the controller 401 first powers on the graphene heating cloth for 5 minutes to make the umbrella cloth generate heat, melt the ice and snow so that the ice and snow fall off from the double-layer umbrella cloth and the round plate platform, and then starts the umbrella-closing action. Multiple telescopic rods contract simultaneously, dragging the double-layer umbrella cloth to be retracted upward, so that the protected device 600 is no longer covered and returns to the working state.

[0051] Embodiment:

[0052] To prevent online monitoring devices such as image monitoring and video monitoring cameras and wind turbines from being affected by icing, and to ensure that the online monitoring devices of transmission lines are protected from freezing during cold snaps and rain and snow icing periods, a special anti-icing cover for online monitoring devices of transmission lines has been invented and designed. It is installed directly above the online monitoring devices that need to be protected, such as image monitoring and video monitoring cameras and wind turbines, to prevent rain and snow from attacking the devices and freezing, and to avoid the wind turbine from being frozen by ice and snow and unable to operate normally, and to prevent the image monitoring and video monitoring cameras from being frozen by rain and snow and unable to work properly.

[0053] Basic working principle of the special anti-icing cover for online monitoring devices of transmission lines: First, install the special anti-icing cover directly above the online monitoring devices such as image monitoring and video monitoring cameras and wind turbines by means of customized fixtures; the special anti-icing cover is equipped with a temperature controller and a rain and snow sensor to monitor the on-site meteorological conditions; when the monitored temperature is lower than -1°C and there is rain and snow at the same time, the special anti-icing cover starts the action of lowering the anti-icing cover. Through the extension of the electric telescopic rod and the fixed steel ring, the double-layer umbrella cloth is pushed down to cover the monitoring cameras, wind turbines and other devices with the umbrella cloth, as Figure 3 , protected from rain, snow and freezing. The outer layer of the double-layer umbrella cloth is polyester fiber, that is, the umbrella cloth, and the inner layer is graphene heating cloth; when it is monitored that the temperature is higher than -1°C or there is no rain and snow on site, one of the two conditions is met, then the anti-icing cover starts the action of lifting the anti-icing cover, and the umbrella cloth is retracted by the contraction of the electric telescopic rod, as Figure 4 , enabling the image monitoring and video monitoring cameras and wind turbines to quickly return to the normal working state.

[0054] In the present invention, the anti-icing cover is installed on the iron tower body through customized fixtures, so that the device is directly above the online monitoring devices such as image monitoring and video monitoring cameras and wind turbines.

[0055] The device is equipped with an XH-W1209 digital display intelligent temperature controller with a waterproof sensor, which can be pre-set to any temperature between -50°C and 110°C; at the same time, it is equipped with a JXBS-3001-YX rain and snow sensor, and the sensing surface of the sensor is kept at an angle of 15 degrees to the horizontal plane.

[0056] The device uses a stainless steel round plate or galvanized steel plate with a thickness of 4 mm as the equipment platform, as Figures 3 - 6, four H02-1 type electric telescopic rods are set to penetrate the platform and be fixed thereon, and ensure perpendicularity to the board. The size of the board and the spacing of the four electric telescopic rods are customized according to the size of the protected equipment. The telescopic length of the electric telescopic rods can be customized according to the protected equipment; above the equipment platform, devices such as a digital display intelligent temperature controller, a rain and snow sensor, and a waterproof control box are installed; a stainless steel ring is inserted into the bottom ring of the four electric telescopic rods and sewn and connected to the bottom of the protective umbrella cloth. An inclined hook is provided at the end of the telescopic rod to prevent the protective umbrella cloth from hanging down after the umbrella is retracted. The protective umbrella cloth is made of double-layer cloth, polyester fiber cloth and graphene heating cloth. The top of the protective umbrella cloth is sewn and connected to the stainless steel ring and then fixed to the bottom of the equipment platform; this device has low energy consumption, and the power supply can share with the on-line monitoring equipment. The on-line monitoring equipment for transmission lines is generally equipped with a 24V or 12V battery + a wind-solar complementary power generation device.

[0057] Working principle: ① Under normal meteorological conditions, when the temperature is higher than -1°C or there is no rain or snow, the device is in the retracted state as shown in Figure 4 . ② When it is monitored that the temperature is lower than -1°C and there is rain and snow at the same time, the device starts the umbrella-opening action. The four telescopic rods extend simultaneously to push the bottom circular steel ring, so that the double-layer umbrella cloth unfolds downward, covering the protected equipment such as the monitoring camera and the wind turbine with the double-layer umbrella cloth, as shown in Figure 3 , to protect them from rain, snow and ice attacks. ③ When it is monitored that the temperature is higher than -1°C, or no rain or snow is monitored at the site, the device starts the umbrella-retracting action. The four telescopic rods contract simultaneously, dragging the double-layer umbrella cloth to retract upward, as shown in Figure 4 , so that the protected equipment such as the image monitoring and video monitoring cameras and the wind turbine is no longer covered and quickly returns to the normal working state; ④ When it is monitored that the temperature is higher than -1°C and rain, snow and ice are monitored at the site, the device first powers on the graphene heating cloth for 5 minutes to make the umbrella cloth heat up, melt the ice and snow so that the ice and snow fall off from the double-layer umbrella cloth and the round plate platform, and then starts the umbrella-retracting action. The four telescopic rods contract simultaneously, dragging the double-layer umbrella cloth to retract upward, as shown in Figure 4 , so that the protected equipment such as the image monitoring and video monitoring cameras and the wind turbine is no longer covered and quickly returns to the normal working state.

[0058] The circuit diagram of this device is as shown in 7-11. The PLC programmable controller program settings are as follows:

[0059] 1) If I6 (KA1&KA2) jumps up, after a 15-minute delay, the output Q2 closes, that is, KA3 acts, starting to open the umbrella. After a 20-second delay, the output Q2 disconnects, that is, KA3 is powered off;

[0060] 2) If I6 (KA1&KA2) jumps down, after a 15-minute delay, the output Q3 closes, that is, KA4 acts, starting to retract the umbrella. After a 320.00-second delay, the output Q3 disconnects;

[0061] 3) If I0 (KA1) is open and I3 (KA2) is closed, output Q4 is closed, i.e., KA5 operates, the umbrella retraction action occurs, with a 20-second delay, then output Q5 is open, i.e., KA5 is de-energized;

[0062] 4) If I0 (KA1) is open and I3 (KA2) is open, output Q4 is closed, i.e., KA5 operates, the umbrella retraction action occurs, with a 20-second delay, then output Q5 is open, i.e., KA5 is de-energized;

[0063] 5) If I0 (KA1) is closed and I3 (KA2) is open, output Q5 is closed, i.e., KA6 operates, starting the heating of the graphene heating cloth. After a 5-minute delay, output Q5 is open, i.e., KA6 is de-energized. Output Q4 is closed, i.e., KA5 operates, the umbrella retraction action occurs, with a 20-second delay, then output Q5 is open, i.e., KA5 is de-energized.

[0064] Appendix: Program preparation and annotation of OHR-PR10 type PLC programmable controller

[0065]

Claims

1. An anti-icing cover for online monitoring equipment of a power transmission line, characterized in that: The invention comprises a mounting base (100), a plurality of electric telescopic rods (300) are arranged on the mounting base (100), the electric telescopic rods (300) are fixedly connected to the mounting base (100) and the telescopic ends thereof extend through the lower end of the mounting base (100), a flexible anti-icing cover body is arranged below the mounting base (100), the ends of the telescopic ends of the electric telescopic rods (300) are connected to the lower end of the flexible anti-icing cover body, and the space within the flexible anti-icing cover body is used for accommodating the protected equipment (600); A control box (400) is provided on the mounting base plate (100), a controller (401) is provided in the control box (400), an input end of the controller (401) is electrically connected to a rain and snow sensor (410) and a temperature sensor (420) outside the control box (400), and an output end of the controller (401) controls the extension and retraction of the electric telescopic rod (300); The flexible anti-icing cover is a double-layer umbrella cloth, the outer layer of the double-layer umbrella cloth is polyester fiber, and the inner layer of the double-layer umbrella cloth is a graphene heating cloth, and the graphene heating cloth is controlled to generate heat by a controller (401).

2. The anti-icing cover of the online monitoring equipment for power transmission lines according to claim 1, characterized in that: The flexible anti-icing cover body is cylindrical in shape, the top of the flexible anti-icing cover body is fixedly connected to the lower surface of the mounting base (100), the lower end opening of the flexible anti-icing cover body is used to expose the protected equipment (600), the column of the flexible anti-icing cover body is provided with a plurality of solid steel rings (220) connected to the cover body above and below, and the end of the telescopic end of the electric telescopic rod (300) is connected to the solid steel ring (220) at the lower end of the flexible anti-icing cover body.

3. The anti-icing cover of the online monitoring equipment for power transmission lines according to claim 2, characterized in that: A hook body (230) is provided at the end of the telescopic end of the electric telescopic rod (300), and the hook body (230) hooks the solid steel ring (220) at the lower end of the flexible anti-icing cover body.

4. The anti-icing cover of the online monitoring equipment for power transmission lines according to claim 2, characterized in that: The solid steel ring (220) is connected to the flexible anti-icing cover body via nylon rings (250) that are evenly distributed around the body, and the upper and lower nylon rings (250) are located in corresponding positions, and the upper and lower nylon rings (250) are connected together via a wire.

5. The anti-icing cover of the online monitoring equipment for power transmission lines according to claim 4, characterized in that: The top of the flexible anti-icing cover is a disc-shaped graphene heating base cloth (500); the upper surface of the graphene heating base cloth (500) is fixedly connected to the lower surface of the mounting substrate (100); the lower end of the graphene heating base cloth (500) is connected to the double-layer cylindrical cover body; and the graphene heating base cloth (500) is electrically connected to the graphene heating cloth on the inner layer of the cover body.

6. The anti-icing cover of the online monitoring equipment for power transmission lines according to claim 5, characterized in that: The edge of the installation substrate (100) is provided with an anti-hanging embedded shell (240), and the anti-hanging embedded shell (240) wraps and fixes the edges of the installation substrate (100) and the graphene heating base cloth (500).

7. An anti-icing cover for online monitoring equipment of a power transmission line according to claim 6, characterized in that: The mounting base plate (100) is provided with a fixedly connected mounting angle steel (120), and the mounting angle steel (120) is used to mount and fix the entire anti-icing device.

8. An anti-icing method using an anti-icing cover for online monitoring equipment of a power transmission line according to claim 7, characterized in that: include: When the rain and snow sensor (410) and the temperature sensor (420) detect that the temperature is higher than -1°C or there is no rain or snow, it is determined to be a normal weather condition. At this time, the controller (401) controls the electric telescopic rod (300) to be retracted, driving the flexible anti-icing cover to be retracted, and the protected equipment (600) is exposed to work normally; When the temperature is detected to be lower than -1°C and there is rain or snow, the controller (401) starts the umbrella opening action, and the plurality of electric telescopic rods (300) simultaneously extend to push the bottom solid steel ring (220), so that the double-layer umbrella cloth is unfolded downward to cover the protected equipment (600) and prevent it from being attacked by rain, snow or ice; When the temperature is detected to be higher than -1°C, or when no rain or snow is detected on site, the controller (401) starts the umbrella folding action, and the plurality of electric telescopic rods (300) are simultaneously retracted, dragging the double-layer umbrella cloth upwards, so that the protected equipment (600) is no longer covered and returns to a working state; When the temperature is detected to be higher than -1°C and rain, snow and ice are detected on site, the controller (401) first powers the graphene heating cloth for 5 minutes to heat the umbrella cloth, melt the ice and snow so that the ice and snow fall off the double-layer umbrella cloth and the circular plate platform, and then starts the umbrella folding action, and the multiple telescopic rods are retracted at the same time, dragging the double-layer umbrella cloth upward to fold it up, so that the protected equipment (600) is no longer covered and returns to the working state.

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