Active de-icing composite insulator for high voltage transmission lines

Abstract

The present application relates to composite insulator, specifically to a kind of active deicing composite insulator for high-voltage transmission line, it includes core column, umbrella skirt and deicing mechanism, near umbrella skirt upper surface is provided with heat insulation layer, the outer surface of heat insulation layer is provided with photo-thermal hydrophobic area and single hydrophobic area, deicing mechanism is composed of connecting rod, horizontal shaft, cam, camshaft, sliding card holder, deicing stick and homing spring.The present application has organically combined the moving speed difference of connecting rod and deicing stick, the hydrophobicity difference of photo-thermal hydrophobic area and single hydrophobic area and temperature difference, reaches the green environmental protection efficient active deicing effect under the condition of no any energy consumption, in addition, the present application also realizes that all heat is used for ice melting and deicing and protects umbrella skirt not to be aged due to overheating, while guaranteeing efficient deicing, the service life of umbrella skirt is greatly extended.

Description

Technical Field

[0001] This invention relates to composite insulators, specifically an active de-icing composite insulator for high-voltage transmission lines, belonging to the field of composite material technology. Background Technology

[0002] As is well known, insulators are devices installed between conductors at different potentials or between a conductor and a grounding component. They can withstand the combined effects of voltage and mechanical stress, playing a crucial role in high-altitude power transmission lines as a special type of insulating control. With the increasing electricity demand in my country, power distribution lines inevitably need to be built in harsh, extremely cold regions. The damp and cold external environment causes severe icing on the surface of insulators, resulting in bridging between their skirts and affecting the stable operation of the power system. To solve the problem of icing on line insulators, insulators with anti-icing functions have emerged. However, existing insulators use relatively limited materials, have insufficient hydrophobic properties, and lack active de-icing capabilities, making it easy for rainwater to accumulate on the surface of high-voltage line insulators, leading to icing and ultimately damage to the insulators, affecting their service life and quality. Summary of the Invention

[0003] The purpose of this invention is to provide an active de-icing composite insulator for high-voltage transmission lines to solve the problems mentioned in the background art.

[0004] The technical solution of the present invention is as follows.

[0005] An active de-icing composite insulator for high-voltage transmission lines includes a core column, skirts, and a de-icing mechanism. The skirts are perpendicular to and mechanically connected to the core column, with a certain interval between them. The de-icing mechanism is located at the interval between the skirts and mechanically connected to the core column. The skirts are made of vulcanized silicone rubber, with a heat insulation layer near the upper surface. The outer surface of the heat insulation layer has alternating photothermal hydrophobic areas and single hydrophobic areas. The de-icing mechanism consists of a connecting rod, a horizontal shaft, a cam, a camshaft, a sliding bracket, a de-icing rod, and a return spring. The upper end of the connecting rod is mechanically connected to the outer edge of the skirt, and the lower end is mechanically connected to the horizontal shaft. The horizontal shaft is fixed near the outer edge of the cam, and the camshaft is fixed at the center of the cam. The sliding bracket is placed on the upper outer edge of the cam and forms a sliding connection with the outer edge of the cam. The sliding bracket is mechanically connected to the lower end of the de-icing rod located directly above the sliding bracket. A return spring is fitted around the outer edge of the de-icing rod, and the upper end of the de-icing rod is mechanically connected to the inner edge of the skirt.

[0006] The photothermal hydrophobic region is formed by uniformly mixing carbon black or copper oxide with photothermal conversion effect and heptadecafluorodecyltriethoxysilane or hexadecyltrimethoxysilane with hydrophobic properties.

[0007] The single hydrophobic region is formed by uniformly mixing silica particles, polytetrafluoroethylene particles or titanium dioxide particles with hydrophobic properties, polydimethylsiloxane and curing agent.

[0008] The heat insulation layer is any one of polydimethylsiloxane, polyurethane, polystyrene, or silicate with a porous structure.

[0009] The beneficial effects of the present invention are as follows: (1) When the umbrella skirt surface is covered with ice, the weight of the umbrella skirt increases sharply and drives the connecting rod connected to the outer edge of the umbrella skirt to move down and drive the cam to rotate at the same time. The rotation of the cam drives the de-icing rod to move up quickly. Due to the cam structure, the speed at which the connecting rod drives the edge of the umbrella skirt to move down is much different from the speed at which the de-icing rod drives the inner edge of the umbrella skirt to move up. Therefore, the ice layer can be broken up quickly and effectively and made to fall off. That is, green, environmentally friendly and efficient active de-icing can be achieved without the action of external force. (2) The outermost layer of the umbrella skirt is composed of a photothermal hydrophobic area and a single hydrophobic area. The hydrophobic properties of the two drive water droplets or dew to roll down quickly from the umbrella skirt surface, thereby preventing the ice from forming on the umbrella skirt surface. More importantly, the hydrophobicity of the photothermal hydrophobic area and the single hydrophobic area is much different, which causes the time point at which supercooled water freezes on the umbrella skirt surface to be much different. That is, the ice layer is difficult to form a continuous structure on the umbrella skirt surface, which makes it easier for the de-icing mechanism to break the ice layer when it is working. (3) The photothermal hydrophobic zone also has the characteristic of converting sunlight into heat energy. That is, the light can quickly raise the temperature of the photothermal hydrophobic zone. It not only achieves the effect of melting and de-icing in the photothermal hydrophobic zone, but also creates a large temperature difference between the photothermal hydrophobic zone and the single hydrophobic zone, further hindering the formation of a continuous structure of ice layer on the umbrella skirt surface, providing another major guarantee and support for the de-icing mechanism to break the ice layer. (4) The heat insulation layer not only prevents the heat of the photothermal hydrophobic zone from being transferred to the umbrella skirt, that is, allows all the heat to be used for melting and de-icing, but also protects the umbrella skirt from aging due to overheating caused by the heat accumulation in the photothermal hydrophobic zone. At the same time, it also plays a role in corrosion prevention and corrosion resistance, that is, greatly improving the service life of the umbrella skirt. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of an active de-icing composite insulator used in high-voltage transmission lines.

[0011] Figure 2 This is a schematic diagram of the surface coating structure of the shed of an active de-icing composite insulator used in high-voltage transmission lines.

[0012] Figure 3 This is a schematic diagram of the de-icing mechanism of an active de-icing composite insulator used in high-voltage transmission lines.

[0013] In the diagram: 1-core column, 2-umbrella skirt, 21-heat insulation layer, 22-photothermal hydrophobic area, 23-single hydrophobic area, 3-de-icing mechanism, 31-connecting rod, 32-horizontal axis, 33-cam, 34-camshaft, 35-sliding bracket, 36-de-icing rod, 37-returning spring. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments.

[0015] Example 1: An active de-icing composite insulator for high-voltage transmission lines.

[0016] like Figures 1 to 3 As shown, an active de-icing composite insulator for high-voltage transmission lines includes a core post 1, sheds 2, and a de-icing mechanism 3. Shelves 2 are perpendicular to and mechanically connected to the core post 1, with a certain gap between them. The de-icing mechanism 3 is located at the gap between the sheds and sheds 2 and is mechanically connected to the core post 1. Shelves 2 are made of vulcanized silicone rubber. A heat insulation layer 21 is bonded near the upper surface of the sheds 2. The outer surface of the heat insulation layer 21 is coated with photothermal hydrophobic regions 22 and single hydrophobic regions 23, which are arranged alternately. The heat insulation layer 21 is made of porous polyurethane foam. The photothermal hydrophobic regions 22 are uniformly mixed from carbon black with photothermal conversion effect and heptadecafluorodecyltriethoxysilane with hydrophobic properties. The single hydrophobic regions 23... It is made of a uniform mixture of hydrophobic silica particles, polydimethylsiloxane, and curing agent; the de-icing mechanism 3 consists of a connecting rod 31, a horizontal shaft 32, a cam 33, a camshaft 34, a sliding seat 35, a de-icing rod 36, and a return spring 37. The upper end of the connecting rod 31 is mechanically connected to the outer edge of the umbrella skirt 2, and the lower end of the connecting rod 31 is mechanically connected to the horizontal shaft 32. The horizontal shaft 32 is fixed near the outer edge of the cam 33, and the camshaft 34 is fixed at the center of the cam 33. The sliding seat 35 is placed on the upper outer edge of the cam 33 and forms a sliding connection with the outer edge of the cam 33. The sliding seat 35 is mechanically connected to the lower end of the de-icing rod 36 located directly above the sliding seat 35. The outer edge of the de-icing rod 36 is fitted with a return spring 37, and the upper end of the de-icing rod 36 is mechanically connected to the inner edge of the umbrella skirt 2.

[0017] Example 2: An active de-icing composite insulator for high-voltage transmission lines.

[0018] like Figures 1 to 3As shown, an active de-icing composite insulator for high-voltage transmission lines includes a core post 1, skirts 2, and a de-icing mechanism 3. The skirts 2 are perpendicular to and mechanically connected to the core post 1, with a certain gap between them. The de-icing mechanism 3 is located at the gap between the skirts 2 and is mechanically connected to the core post 1. The skirts 2 are made of vulcanized silicone rubber. A heat insulation layer 21 is bonded near the upper surface of the skirts 2. The outer surface of the heat insulation layer 21 is coated with photothermal hydrophobic regions 22 and single hydrophobic regions 23, which are arranged alternately. The heat insulation layer 21 is made of porous polystyrene foam. The photothermal hydrophobic regions 22 are uniformly mixed from carbon black with photothermal conversion effect and hexadecyltrimethoxysilane with hydrophobic properties. The single hydrophobic regions 22 and 23 are... 3 is uniformly mixed with hydrophobic polytetrafluoroethylene particles, polydimethylsiloxane, and curing agent; the de-icing mechanism 3 consists of a connecting rod 31, a horizontal shaft 32, a cam 33, a camshaft 34, a sliding seat 35, a de-icing rod 36, and a return spring 37. The upper end of the connecting rod 31 is mechanically connected to the outer edge of the umbrella skirt 2, and the lower end of the connecting rod 31 is mechanically connected to the horizontal shaft 32. The horizontal shaft 32 is fixed near the outer edge of the cam 33, and the camshaft 34 is fixed at the center of the cam 33. The sliding seat 35 is placed on the upper outer edge of the cam 33 and forms a sliding connection with the outer edge of the cam 33. The sliding seat 35 is mechanically connected to the lower end of the de-icing rod 36 located directly above the sliding seat 35. The outer edge of the de-icing rod 36 is fitted with a return spring 37, and the upper end of the de-icing rod 36 is mechanically connected to the inner edge of the umbrella skirt 2.

[0019] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An active de-icing composite insulator for high-voltage transmission lines, comprising a core post, sheds, and a de-icing mechanism, characterized in that, The umbrella skirt is perpendicular to the core column and mechanically connected to it. A certain gap is maintained between the umbrella skirts. The de-icing mechanism is located at the gap between the umbrella skirts and is mechanically connected to the core column. The umbrella skirt is made of vulcanized silicone rubber. A heat insulation layer is set near the upper surface of the umbrella skirt. The outer surface of the heat insulation layer is set with photothermal hydrophobic area and single hydrophobic area, which are arranged alternately. The de-icing mechanism consists of a connecting rod, a horizontal shaft, a cam, a camshaft, a sliding bracket, a de-icing rod, and a return spring. The upper end of the connecting rod is mechanically connected to the outer edge of the umbrella skirt, and the lower end of the connecting rod is mechanically connected to the horizontal shaft. The horizontal shaft is fixed near the outer edge of the cam, and the camshaft is fixed at the center of the cam. The sliding bracket is placed on the upper outer edge of the cam and forms a sliding connection with the outer edge of the cam. The sliding bracket is mechanically connected to the lower end of the de-icing rod located directly above the sliding bracket. A return spring is sleeved on the outer edge of the de-icing rod, and the upper end of the de-icing rod is mechanically connected to the inner edge of the umbrella skirt.

2. The active de-icing composite insulator for high-voltage transmission lines according to claim 1, characterized in that, The photothermal hydrophobic region is formed by uniformly mixing carbon black or copper oxide with photothermal conversion effect and heptadecafluorodecyltriethoxysilane or hexadecyltrimethoxysilane with hydrophobic properties.

3. The active de-icing composite insulator for high-voltage transmission lines according to claim 1, characterized in that, The single hydrophobic region is formed by uniformly mixing silica particles, polytetrafluoroethylene particles or titanium dioxide particles with hydrophobic properties, polydimethylsiloxane and curing agent.

4. The active de-icing composite insulator for high-voltage transmission lines according to claim 1, characterized in that, The heat insulation layer is any one of polydimethylsiloxane, polyurethane, polystyrene, or silicate with a porous structure.

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