Annular device suitable for deicing overhead transmission line

Abstract

The invention discloses an annular device suitable for deicing an overhead transmission line, and the device comprises a first housing, one side of the first housing is provided with a first groove, the other side of the first housing is provided with a second groove, the first groove is connected with a first sliding block of a second housing in an inserted manner, and the second sliding block is provided with a second sliding block; the second groove is connected with a second sliding block of the second shell in an inserted mode, and the first sliding block and the second sliding block are installed on the two sides of the second shell respectively. A semicircular first coil is placed in the first shell, a semicircular second coil is placed in the second shell, and one end of the first coil penetrates through the first groove and is connected with one end of the second coil penetrating through the first sliding block. The other end of the second coil penetrates through the second sliding block and is connected with the other end of the first coil penetrating through the second groove. The deicing efficiency can be effectively improved, the failure rate of a power grid is reduced, and the safety of operators is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of deicing of overhead lines, and in particular to an annular device suitable for deicing overhead power transmission lines. Background Art

[0002] Overhead transmission lines are the most important part of the backbone grid of the power system. However, in freezing rain or heavy snow, overhead lines are prone to ice, which makes the lines overweight, the conductors thicker, and the wind-exposed area larger, causing violent swaying. The swaying amplitude and force exceed the normal tolerance of the wires, resulting in wire breakage and tower collapse. In addition, ice will increase the resistance of the wires, causing the current to generate greater heat, posing a threat to personal safety.

[0003] In order to solve these problems, the main de-icing methods of the power system currently include: 1. DC current de-icing technology: using DC current to generate heat in the conductor resistance to melt the ice, it is necessary to install a DC converter voltage regulator. 2. AC short-circuit current de-icing technology: used on low-voltage lines, a special transformer or generator is used to supply short-circuit current to disconnect the ice-covered line from the system. 3. Mechanical de-icing method: when the line is covered with thin ice, a pulley-type de-icer is used for de-icing. The line is shut down, personnel are organized to climb the pole, and hammers are used to knock. When the ice on the line thickens rapidly but does not reach the design value, the conductor is vibrated to remove the ice. In addition, there are natural de-icing methods, such as self-falling with the help of wind, gravity, etc.; and installing snow blocking rings, counterweights and other devices on the transmission line to make them fall off automatically when the snow or ice reaches a certain level.

[0004] In general, the choice of deicing method should be based on actual conditions, and it is necessary to comprehensively consider factors such as geographical environment, meteorological conditions, line conditions and operation requirements. Existing deicing methods may cause damage to the line. For example, mechanical deicing may cause damage to the line during operation; thermal deicing will reduce the current carrying capacity of the line and consume a lot of energy; natural deicing is limited by natural conditions and cannot guarantee timely and effective deicing. Summary of the invention

[0005] In view of the above problems, the present invention provides a deicing device which can effectively improve deicing efficiency, reduce the failure rate of the power grid, and ensure the safety of operators.

[0006] In order to achieve the above-mentioned object, the present invention provides an annular device suitable for deicing overhead power transmission lines, comprising: a first shell, a first groove is provided on one side of the first shell, a second groove is provided on the other side of the first shell, the first groove is plug-connected with a first slider of the second shell, the second groove is plug-connected with a second slider of the second shell, and the first slider and the second slider are respectively installed on both sides of the second shell;

[0007] A semicircular first coil is placed in the first shell, and a semicircular second coil is placed in the second shell. One end of the first coil is passed through the first groove and connected to one end of the second coil passed through the first slider. The other end of the second coil is passed through the second slider and connected to the other end of the first coil passed through the second groove.

[0008] In a preferred embodiment, the first shell and the second shell are both hollow semi-annular structures.

[0009] In a preferred embodiment, the sides of the first shell and the second shell are respectively provided with grooves for placing counterweights.

[0010] In a preferred embodiment, the sides of the first shell and the second shell are respectively provided with round holes for passing ropes.

[0011] In a preferred embodiment, the first shell and the second shell are both made of insulating materials.

[0012] The beneficial effects of the present invention are: simple structure, the structure of the annular device is relatively simple, easy to manufacture and maintain, and reduces equipment cost and maintenance cost; efficient deicing, the annular device can be tightly wrapped around the overhead line, and the ice layer can be effectively removed by spiral and bouncing methods, thereby improving deicing efficiency; no damage to the line, the design and material of the annular device can avoid damage to the overhead line and protect the safe operation of the line. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the device structure of the present invention;

[0014] Figure 2 It is a side view of the device structure of the present invention. DETAILED DESCRIPTION

[0015] Embodiment 1:

[0016] The object of the present invention is to provide a ring-shaped device suitable for deicing overhead power transmission lines, the structure of which is shown in FIG. Figure 1 , Figure 2 As shown. After the line is covered with ice, the device is put on the conductor and pulled down along the conductor by a drone or ground personnel using a rope. The device is acted upon by the Lorentz force in the magnetic field of the conductor, causing spiral and bounce, which can remove ice from overhead transmission lines.

[0017] The current in the wire will generate a magnetic field around it. According to Ampere's law, there will be a magnetic path for each unit length of the straight wire. These magnetic paths form a tube-like magnetic field surrounding the wire. When the device is placed in the magnetic field of the wire, the magnetic field inside the device interacts with the magnetic field around the wire. Due to the existence of the magnetic field, eddy currents will be generated inside the device. These eddy currents will generate a magnetic field, which will then interact with the original magnetic field to generate a force.

[0018] The action of this force can cause the device to produce a specific movement mode, such as spiral or bouncing. If the device moves in a spiral form, it is because it experiences an uneven magnetic field distribution during the descent, causing the direction and magnitude of the force to change with the position. The bouncing movement is caused by the periodic changing force caused by the change of eddy currents inside the device. Both movement modes can effectively remove ice from overhead transmission lines.

[0019] In addition, when current passes through a wire to form a magnetic field, the strength of the magnetic field is related to the distance from the center of the wire. If the radius of the wire increases, the magnetic field strength will weaken under the same current due to the increase in path length. Changes in magnetic field strength will also affect the movement of the ring device.

[0020] In a circular current, the magnetic field is stronger near the conductor than in the center of the ring. If the ring device slides down the conductor and approaches the conductor, it will be affected by the magnetic field more strongly, aggravating the movement of the device.

[0021] The movement of the device can also be enhanced by adding counterweights.

[0022] The spiral or bouncing motion of the ring device sliding down the conductor may be a complex result of the magnetic field generated by the conductor and its interaction with the iron ring. Through the spiral and bouncing motion of the device on the conductor, ice covering the overhead transmission line can be effectively knocked away.

[0023] The specific implementation of the present invention includes three parts:

[0024] (1) First, use the operating rod to put the ring device on the ice-covered wire;

[0025] (2) Using the device's own gravity, a drone, or ground personnel to pull it down along the wire using a rope;

[0026] (3) During the sliding process of the device, all ice on the wires can be removed;

[0027] (4) After the ice on the line is cleared, remove the device.

[0028] The use of the present invention has broad application prospects: 1. It can reduce the line failure rate: through effective deicing, the failure rate caused by line freezing can be reduced, and the stability and reliability of the power grid can be improved; 2. Reduce maintenance workload: The use of a ring device can reduce the workload of manual inspection and maintenance, and improve work efficiency.

[0029] Embodiment 2:

[0030] An annular device suitable for deicing an overhead power transmission line comprises: a first shell, a first groove is formed on one side of the first shell, a second groove is formed on the other side of the first shell, the first groove is plug-connected with a first slider of the second shell, the second groove is plug-connected with a second slider of the second shell, and the first slider and the second slider are respectively mounted on both sides of the second shell;

[0031] A semicircular first coil is placed in the first shell, and a semicircular second coil is placed in the second shell. One end of the first coil is passed through the first groove and connected to one end of the second coil passed through the first slider. The other end of the second coil is passed through the second slider and connected to the other end of the first coil passed through the second groove.

[0032] The first shell and the second shell are both hollow semi-annular structures.

[0033] The sides of the first shell and the second shell are respectively provided with grooves for placing counterweights.

[0034] The sides of the first shell and the second shell are respectively provided with round holes for passing ropes.

[0035] The first shell and the second shell are both made of insulating material.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ring-shaped device suitable for deicing overhead power transmission lines, characterized in that: It includes: A first housing, wherein a first groove is formed on one side of the first housing, and a second groove is formed on the other side of the first housing, wherein the first groove is plug-connected to a first slider of the second housing, and the second groove is plug-connected to a second slider of the second housing, and the first slider and the second slider are respectively mounted on two sides of the second housing; A semicircular first coil is placed in the first shell, and a semicircular second coil is placed in the second shell. One end of the first coil is passed through the first groove and connected to one end of the second coil passed through the first slider. The other end of the second coil is passed through the second slider and connected to the other end of the first coil passed through the second groove.

2. The annular device for deicing overhead power lines according to claim 1, characterized in that: The first shell and the second shell are both hollow semi-annular structures.

3. The annular device for deicing overhead power lines according to claim 1, characterized in that: The sides of the first shell and the second shell are respectively provided with grooves for placing counterweights.

4. The annular device for deicing overhead power lines according to claim 1, characterized in that: The sides of the first shell and the second shell are respectively provided with round holes for passing ropes.

5. The annular device for deicing overhead power lines according to claim 1, characterized in that: The first shell and the second shell are both made of insulating material.

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