A pneumatic anti-icing spacer device

Abstract

The present invention relates to an aerodynamic anti-icing spacer device, comprising a spacer, a rotating fan blade connected by a fan blade fixing steel pipe and driven by a motor is arranged in the middle of the spacer, the rotating fan blade is fixed on the fan blade fixing steel pipe, and the fan blade fixing steel pipe is rotatably connected to the frame of the spacer; a packaging box is fixed on the frame of the spacer, a wind direction sensor is arranged on the packaging box, and a sensor and a battery electrically connected thereto are arranged inside the packaging box; a solar panel or a vertical axis wind turbine is fixed on the frame of the spacer, and the generated electric energy is stored in the battery, and the battery is used to supply power to the motor and the load of the battery or directly to the load of the motor and the battery; the aerodynamic anti-icing spacer device also includes a controller, and the motor, the sensor, and the wind direction sensor are electrically connected to the controller. The present invention uses the airflow generated by the rotating fan blade to change the flow field around the wire, reduce the collision coefficient of water droplets on the wire, and thus reduce ice on the wire.

Description

Technical Field

[0001] The invention belongs to the technical field of high-voltage power transmission, and in particular relates to a pneumatic anti-icing spacer device. Background Art

[0002] With the development of society, human production and life cannot be separated from a reliable power supply, and the demand for electric energy in countries around the world is constantly increasing. High-voltage power transmission has the characteristics of long transmission distance and high efficiency. High-voltage power transmission generally uses multi-split conductors for high-voltage power transmission, such as 750KV using six-split conductors. Because the cold air with water droplets under conditions such as rain, snow and low temperature will hit the surface of the conductor under the influence of the wind, and the water droplets after the impact will freeze on the surface of the conductor, and the volume of the conductor will gradually increase and the weight will become heavier. The split conductor has a larger surface area, so its icing problem is more serious. Icing of the conductor will cause a variety of power grid accidents.

[0003] At present, the quickest measure to deal with the above situation of split conductors is to prevent ice. The methods of anti-icing include heat melting method: heating the conductor, but this method consumes a lot of electricity, and the conductor needs to be short-circuited during heating, causing the transmission line to stop transmitting power, which is not economical; conductor hydrophobic coating method: applying it on the surface of the conductor to make it smooth so that rain and snow cannot adhere to the surface of the conductor, but this method requires regular maintenance of the coating, and the coating is a chemical composition that may pollute the environment; manual deicing method: relying on manual labor to use tools to knock and de-ice, but this method requires a lot of manpower and material resources, and can only de-ice on a small scale. Therefore, it is necessary to develop more efficient and environmentally friendly anti-icing devices. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an aerodynamic anti-icing spacer device. By utilizing the principles of aerodynamics, fan blades, sensors, batteries and solar panels are installed on the existing six-split conductor spacers. The strong airflow "air wall" generated by mechanical rotation can change the air field around the conductor, thereby changing the direction of the airflow carrying supercooled water droplets perpendicular to the conductor direction, reducing the possibility of supercooled water droplets colliding with the conductor, and can effectively reduce the icing of the conductor and reduce the possibility of icing disasters in the power grid.

[0005] An aerodynamic anti-icing spacer device comprises a spacer, wherein a rotating fan blade connected by a fan blade fixing steel pipe and driven by a motor is arranged in the middle of the spacer, the rotating fan blade is fixed on the fan blade fixing steel pipe, and the fan blade fixing steel pipe is rotatably connected to the frame of the spacer; a packaging box is fixed on the frame of the spacer, a wind direction sensor is arranged on the packaging box, and a sensor and a battery electrically connected thereto are arranged inside the packaging box; a solar panel or a vertical axis wind turbine is fixed on the frame of the spacer, the generated electric energy is stored in the battery, and the battery is used to supply power to the motor and the load of the battery or directly supplies power to the motor and the load of the battery;

[0006] The aerodynamic anti-icing spacer device also includes a controller, and the motor, sensor, and wind direction sensor are electrically connected to the controller.

[0007] The rotating blades are evenly distributed along the central axis of the spacer rod, and the rotating blades rotate around the central axis of the spacer rod under the drive of the motor.

[0008] Three rotating blades are evenly distributed in the middle of the spacer rod.

[0009] The sensors include a temperature sensor and a humidity sensor.

[0010] A steering motor is arranged in the packaging box, the steering motor is electrically connected to the controller, and the fan blade fixing steel pipe is connected to the steering motor through gear transmission; the output end of the steering motor is connected to a driving gear, the driving gear is meshed with a driven gear, the motor seat of the steering motor and the gear shaft of the driven gear are fixed on a connecting seat on the fan blade fixing steel pipe, and the steering motor rotates, and the driven gear and the fan blade fixing steel pipe are driven to rotate through gear meshing, so that the fan blade fixing steel pipe rotates, that is, the fan blade is turned.

[0011] The controller is arranged in the packaging box.

[0012] The vertical axis wind turbine is applicable to all wind directions.

[0013] The beneficial effect of the present invention is that the present invention utilizes the airflow generated by the rotating fan blades to change the flow field around the wire, reduce the collision coefficient of water droplets on the wire, and thus reduce ice covering on the wire.

[0014] 1. Simple structure: The present invention installs fan blades, sensors, batteries and solar panels on the existing spacer bars, wherein the fan blades are arranged in the middle of the spacer bars, and the structure is reasonable and fully utilizes the space; the sensors and batteries do not require high-power motors; at the same time, the solar panels can be replaced by vertical axis wind turbines, and the device can operate normally by relying on the vertical axis wind turbines to provide electricity when the sunshine conditions do not meet the standards.

[0015] 2. Novel principle: Different from other wire anti-icing methods, the present invention changes the flow field direction around the wire, reduces the collision coefficient of supercooled water droplets on the wire, and can also blow off the fallen snow on the wire, reducing wire ice coverage when the rain and snow have not yet frozen.

[0016] 3. Clean and environmentally friendly, the present invention does not use any chemical agents, consumes little power, and saves energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of the power anti-icing spacer device provided in Example 1 of the present invention Figure 1 ;

[0018] Figure 2 A schematic diagram of the structure of the power anti-icing spacer device provided in Example 1 of the present invention Figure 2 ;

[0019] Figure 3 A schematic diagram of the working principle of the powered anti-icing spacer device provided in an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of a physical model of a collision coefficient of a power anti-icing spacer device provided by the present invention;

[0021] Figure 5 Velocity vector diagram of the XZ plane flow field of the finite element simulation of the power anti-icing spacer device provided in the embodiment of the present invention (in this state, the angle between the rotating fan blade and the side wind is 10°);

[0022] Figure 6 A partial enlarged view of the velocity vector diagram of the XZ plane flow field of the finite element simulation of the power anti-icing spacer device provided in an embodiment of the present invention (in this state, the angle between the rotating fan blade and the side wind is 10°);

[0023] Figure 7 This is a control relationship block diagram of Embodiment 1 of the present invention;

[0024] Figure 8 Schematic diagram of the steel pipe for fixing the fan blades;

[0025] Fig. 9 A schematic diagram of the drive section of the steel pipe that fixes the fan blades;

[0026] Fig.10 A schematic diagram of the structure of the power anti-icing spacer device provided in Example 2 of the present invention Figure 1 ;

[0027] Fig.11 Schematic diagram of the structure of the power anti-icing spacer device provided in Example 2 of the present invention Figure 2 ;

[0028] Fig.12 A dimension diagram of the rotating blades in the power anti-icing spacer device provided in embodiments 1 and 2 of the present invention;

[0029] Fig.13 for Fig.13 Side view of

[0030] Fig.14 This is a control relationship block diagram of Embodiment 2 of the present invention;

[0031] in,

[0032] 1-solar panel, 2-rotating blades, 3-blade fixing steel pipe, 31-steering motor, 32-driving gear, 33-driven gear, 4-wind direction sensor, 5-packaging box, 6-motor, 7-spacer rod, 8-vertical axis wind turbine. DETAILED DESCRIPTION

[0033] In order to better explain the present invention and facilitate understanding, the technical solutions and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0034] Example 1

[0035] like Figure 1-2 As shown, an aerodynamic anti-icing spacer device includes a spacer 7, wherein a rotating blade 2 driven by a motor 6 and connected through a blade fixing steel pipe 3 is arranged in the middle of the spacer 7, and the rotating blade 2 is fixed on the blade fixing steel pipe 3, and the blade fixing steel pipe 3 is rotatably connected to the frame of the spacer 7; the rotating blade 2 is evenly distributed along the central axis of the spacer 7, and the rotating blade 2 rotates around the central axis of the spacer 7 driven by the motor 6; in this embodiment, a six-split conductor spacer 7 is adopted, and three rotating blades 2 are evenly distributed in the middle of the spacer 7, and the material is aluminum alloy, and the rotation speed during rotation is 2000rpm. A packaging box 5 is fixed on the frame of the spacer bar 7. A wind direction sensor 4 is provided on the packaging box 5. The wind direction sensor 4 measures the lateral wind direction. A sensor and a battery electrically connected thereto are provided inside the packaging box 5. The sensor includes a temperature sensor and a humidity sensor. A solar panel 1 is fixed on the frame of the spacer bar 7. The spacer bar device is also provided with a controller 1 and an inverter. The solar panel 1 is electrically connected to the battery through the controller 1 and the inverter to supply power to the battery in parallel. The generated electric energy is stored in the battery to supply power to the motor 6 and the battery load. The controller 1 is electrically connected to the controller to prevent the battery from being overcharged or over-discharged. The inverter converts the direct current generated by the solar panel 1 into alternating current. At the same time, the solar panel 1 is directly electrically connected to the motor 6 and the steering motor 31 through the controller 1 and the inverter. The control relationship is as follows: Figure 7 shown.

[0036] The packaging box 5 is provided with a steering motor 31. Figure 8-9 As shown, the blade fixing steel pipe 3 is connected to the steering motor 31 through gear transmission. The output end of the steering motor 31 is connected to a driving gear 32, which is meshed with a driven gear 33. The motor seat of the steering motor 31 and the gear shaft of the driven gear 33 are fixed to the connecting seat on the blade fixing steel pipe 3. When the steering motor 31 rotates, the driven gear 33 and the blade fixing steel pipe 3 are driven to rotate through gear meshing, so that the blade fixing steel pipe 3 rotates, that is, the blades turn.

[0037] The pneumatic anti-icing spacer device also includes a controller, which is arranged in the packaging box 5, and the motor 6, the steering motor 31, the temperature sensor, the humidity sensor, and the wind direction sensor 4 are electrically connected to the controller.

[0038] The rotating blades 2 in this embodiment are as follows Figure 12-13 shown.

[0039] The present invention utilizes the spacer bars on the multi-split conductors for setting, no longer needs an additional power source, can be powered independently by a battery, is provided with a temperature sensor, a humidity sensor, a wind direction sensor 4, and a rotating fan blade 2 whose angle changes according to the wind direction.

[0040] like Figure 7 As shown, the working principle of the spacer device provided in this embodiment is as follows: light irradiates on the solar cell panel 1 to generate current, and the controller 1 determines whether the battery has reached the power limit value to prevent the battery from being overcharged. If the battery has reached the power limit value: the power supply load is light at this time, and the charging power of the battery is reduced, and the battery is powered alone; if the controller 1 determines that the battery has not reached the power limit value, the controller 1 continues to determine whether the battery is in a state of too low power to prevent the battery from being over-discharged. If the battery is not in a state of too low power, the power supply load is large at this time, and the normal charging power is maintained, and the battery and the solar cell panel 1 are powered together; if the battery is in a state of too low power, the power supply to the battery is stopped, and the solar cell panel 1 is powered alone. At the same time, the data detected by the temperature sensor, humidity sensor, and wind direction sensor 4 are transmitted to the controller and compared with the temperature threshold, humidity threshold, and wind speed threshold pre-set in the controller. The controller determines whether the icing condition is met. If the icing condition is not met, the controller continues to receive parameters and judge. When the controller determines that the data fed back by the sensor meets the icing condition, that is, the temperature is below 0°, the relative humidity is above 80%, and the wind speed is 1-20m / s, the motor 6 and the steering motor 31 are started, and the rotating fan blades 2 rotate while the fan blade fixing steel pipe 3 circulates in the range of 0° to 10° toward the incoming wind direction. The generated wind pressure drives the air flow, changes the direction of the airflow around the wire, and makes the airflow perpendicular to the wire direction become more parallel to the guide direction, such as Figure 3 As shown, the collision coefficient of water droplets is reduced, such as Figure 4 As shown, the number of water droplets colliding with the wire per unit time is reduced, thereby reducing the thickness of the wire ice coating and the possibility of wire ice coating disasters.

[0041] like Figure 4 As shown in the figure, the supercooled droplets at the infinite distance of the wire flow toward the wire with the airflow at a speed of v. Due to the obstruction of the wire, the droplets will be deflected in the positive / negative direction of the y-axis with the airflow. 0The velocity v flows toward the wire, and its trajectory is exactly tangent to the outside of the wire, then y 0 is the limit position of the droplet collision. 0 , the droplet collides with the wire; when the absolute value of the ordinate of the starting position of the supercooled droplet is greater than y 0 , it will not collide with the wire. Therefore, the overall collision coefficient of the supercooled droplet can be expressed as E = y 0 / R.

[0042] In order to test the effect of the present invention, the finite element analysis software Ansys Fluent was used to simulate the effect of the device on the flow field around the six-split conductor under the condition of lateral wind perpendicular to the conductor. The results are as follows: Figure 5-6 As shown, Figure 5 It is the velocity vector diagram, and it can be seen that the flow field blowing in the negative X direction around the wire is changed to the positive Z direction by the airflow generated by the rotating fan blade 2; Figure 6 The velocity cloud diagram in the Z direction shows that the velocity in the Z direction around the wire facing the incoming wind direction can reach 4.5 m / s. From the simulation results, the flow field generated by the rotating blade 2 will change the flow field direction around the wire, thereby reducing the collision coefficient of the split wire and reducing the amount of ice covering the wire.

[0043] Example 2

[0044] like Figure 10-11 As shown, the difference between this embodiment and embodiment 1 is that in this embodiment, no solar cell panel 1 is provided, and a vertical axis wind turbine 8 applicable to all wind directions is used to replace the solar cell panel 1, and the rest of the settings and connection methods and working principles and methods are the same as those in embodiment 1.

[0045] The rotating blades 2 in this embodiment are as follows Figure 12-13 shown.

[0046] like Fig.14As shown, the working principle of the spacer device provided in this embodiment is: wind blows through the vertical axis wind turbine 8 to generate current, and the controller determines whether the battery has reached the power limit value to prevent the battery from being overcharged. If the battery has reached the power limit value: the power supply load is light at this time, the charging power of the battery is reduced, and the battery is powered alone; if the controller determines that the battery has not reached the power limit value, the controller continues to determine whether the battery is in a state of too low power to prevent the battery from being over-discharged. If the battery is not in a state of too low power, the power supply load is large at this time, and the normal charging power is maintained, and the battery and the vertical axis wind turbine 8 are powered together; if the battery is in a state of too low power, the power supply to the battery is stopped, and the vertical axis wind turbine 8 is powered alone. At the same time, the data detected by the temperature sensor, humidity sensor, and wind direction sensor 4 are transmitted to the controller and compared with the temperature threshold, humidity threshold, and wind speed threshold pre-set in the controller. The controller determines whether the icing conditions are met. If the icing conditions are not met, the controller continues to receive parameters and judge. When the controller determines that the data fed back by the sensor meets the icing conditions, that is, the temperature is below 0°, the relative humidity is above 80%, and the wind speed is 1-20m / s, the motor 6 and the steering motor 31 are started, and the rotating fan blades 2 rotate while the fan blade fixing steel pipe 3 circulates in the range of 0° to 10° toward the incoming wind direction. The generated wind pressure drives the air flow, changes the direction of the airflow around the wire, and makes the airflow perpendicular to the wire direction become more parallel to the guide direction.

Claims

1. A pneumatic anti-icing spacer device, Features: It comprises a spacer bar, wherein a rotating fan blade connected by a fan blade fixing steel pipe and driven by a motor is arranged in the middle of the spacer bar, the rotating fan blade is fixed on the fan blade fixing steel pipe, and the fan blade fixing steel pipe is rotatably connected to the frame of the spacer bar; a packaging box is fixed on the frame of the spacer bar, a wind direction sensor is arranged on the packaging box, and a sensor and a battery electrically connected thereto are arranged inside the packaging box; a solar panel or a vertical axis wind turbine is fixed on the frame of the spacer bar, and the generated electric energy is stored in the battery, and the battery is used to supply power to the motor and the load of the battery or directly supplies power to the motor and the load of the battery; The aerodynamic anti-icing spacer device also includes a controller, and the motor, sensor, and wind direction sensor are electrically connected to the controller; A steering motor is arranged in the packaging box, the steering motor is electrically connected to the controller, and the fan blade fixing steel pipe is connected to the steering motor through gear transmission; the output end of the steering motor is connected to a driving gear, the driving gear is meshed with a driven gear, the motor seat of the steering motor and the gear shaft of the driven gear are fixed on a connecting seat on the fan blade fixing steel pipe, and the steering motor rotates, and the driven gear and the fan blade fixing steel pipe are driven to rotate through gear meshing, so that the fan blade fixing steel pipe rotates, that is, the fan blade is turned.

2. The pneumatic anti-icing spacer device according to claim 1, Features: The rotating blades are evenly distributed along the central axis of the spacer rod, and the rotating blades rotate around the central axis of the spacer rod under the drive of the motor.

3. The pneumatic anti-icing spacer device according to claim 1, Features: Three rotating blades are evenly distributed in the middle of the spacer rod.

4. The pneumatic anti-icing spacer device according to claim 1, Features: The sensors include a temperature sensor and a humidity sensor.

5. The pneumatic anti-icing spacer device according to claim 1, Features: The controller is arranged in the packaging box.

6. The pneumatic anti-icing spacer device according to claim 1, Features: The vertical axis wind turbine is applicable to all wind directions.

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