CN205406205U - Vertical composite insulator of antifouling sudden strain of a muscle of 10kV - Google Patents

Abstract

The utility model relates to the field of insulators, in particular to a 10kV anti-pollution flashover vertical composite insulator, which consists of a wire seat, an insulating rod, a silicone rubber shed and a cross-arm connecting sleeve, and is characterized in that the silicone rubber shed includes a The U-shaped shed at the top, the middle shed at the middle, the lower shed at the bottom, and the insulating sheath connecting the U-shaped shed, the middle shed, and the lower shed, the structure of the U-shaped shed includes The base and the umbrella edge, the umbrella edge is bent upward to form openings on both sides of the U-shaped shed, and the opening direction is consistent with the extension direction of the wire. Compared with the prior art, the utility model has the following beneficial effects: 1) The structure is simple, and it can play a good protective role in the safe operation of the equipment, avoiding the discharge of the crossarm caused by water flow and icicles under severe weather conditions Accidents happen. 2) It has good compatibility with the cross-arm connection of the existing 10kV distribution line straight pole tower, which is convenient for the upgrading and transformation of the existing vertical insulators.

Description

10kV anti-pollution flashover vertical composite insulator

technical field

The utility model relates to the field of insulators, in particular to a 10kV anti-pollution flashover vertical composite insulator.

Background technique

During the safe operation of electric power enterprises, in order to ensure the normal operation of power transmission and distribution equipment, the conductors on the cross-arms of the straight poles and towers of the distribution lines are connected by vertical insulators. Vertical insulator is a general insulation control that can play an important role in overhead transmission lines to support and fix busbars and live conductors, and to provide sufficient distance and insulation between live conductors or between conductors and the earth. At present, insulators produced in China are generally composed of upper and lower metal parts, insulating rods, and silicone rubber sheds. The anti-seepage effect between the metal parts and insulating rods is poor, which brings risks to the safety of line operation.

When the weather is good and the environmental conditions of the equipment are good, conventional vertical insulators can provide insulation protection to ensure the normal operation of the equipment, but in severe weather conditions, such as low-temperature smog and drizzle in heavily polluted areas Under bad weather conditions, it may cause a short circuit accident. On November 9, 2015, the severe low-temperature smog in Liaoning area caused many distribution lines to trip and short-circuit. The discharge of the crossarm has brought great potential safety hazards to the safe operation of the power system.

Contents of the invention

The purpose of this utility model is to overcome the deficiencies of the existing technology, according to the relevant regulations of electric power enterprise production, to develop a kind of effective insulation support and shielding for distribution wires, and to prevent the edge of vertical insulators from passing through sewage flow and icy slides. 10kV anti-pollution flashover vertical composite insulator with cross-arm discharge.

In order to achieve the above object, the technical solution of the utility model is as follows:

The 10kV anti-pollution flashover vertical composite insulator consists of a lead base, an insulating rod, a silicone rubber shed and a cross-arm connecting sleeve. On the outer surface, the wire seat is used to connect wires, the cross-arm connection sleeve is used to connect the straight pole tower cross-arm, and the silicone rubber shed includes a U-shaped shed at the top, a middle shed at the middle, and a U-shaped shed at the middle. The lower shed, and the insulating sleeve connecting the U-shaped shed, the middle shed, and the lower shed, the structure of the U-shaped shed includes an umbrella base and an umbrella edge, and the umbrella base has a high middle and a low perimeter. Inclination angle, the umbrella edge is located at two opposite edge extension ends of the umbrella base, the umbrella edge is bent upward to form openings on both sides of the U-shaped shed, and the opening direction is consistent with the extension direction of the wire.

The upward bending height L of the umbrella edge is 35-40mm, the maximum edge distance H1 of the umbrella edge after bending is 160-165mm, and the maximum edge distance H2 of the skirt edge on the opening side is 160-165mm; the U-shaped umbrella The distance h1 between the root of the skirt and the middle shed is 35-40mm, the distance h2 between the root of the middle shed and the lower shed is 30-35mm, the outer diameter of the middle shed is 115-120mm, and the lower The outer diameter of the umbrella skirt is 140-145mm for D2.

The wire seat is matched with the wire gland and the gland bolt, and the wire seat is provided with an arc-shaped depression for easy positioning of the wire. The depth a of the arc-shaped depression is 8-10mm, and the radius R of the arc-shaped depression is 15-20mm , the specification of the gland bolts is M8, and the quantity is 2 pieces. The cross-arm connecting sleeve is matched with a nut and a spring washer, and the specification of the nut is M18.

The insulating sleeve body extends upwards to the surface of the wire seat, and extends downwards to the surface of the cross-arm connecting sleeve, and the connection mode of the insulating sleeve body, the wire base and the cross-arm connecting sleeve is glued or vulcanized.

The insulating rod is an epoxy resin fiberglass-reinforced composite polymer mandrel, and the end of the insulating rod is connected to the wire seat and the cross-arm connecting sleeve by means of cold crimping with a vulcanizer.

The electrical performance index requirements of the silicone rubber shed material are: the AC withstand voltage is greater than 30kV, and the DC withstand voltage is greater than 70kV. The hardness of the silicone rubber umbrella skirt is 60-75 degrees Shore hardness.

Compared with the prior art, the beneficial effects of the utility model are:

1) The structure is simple, the manufacture is convenient, the cost is low, the installation is convenient, and the adaptability is wide. It can play a good role in protecting the safe operation of the equipment and avoiding the damage to the crossarm discharge accident caused by water flow and icy slips under severe weather conditions. occur.

2) The unique design of the opening diversion structure can effectively guide the direction of water flow and icicles, and reduce the short-circuit risk of water flow and icicles between the wire and the crossarm through the reasonable distribution of the edge size of the three-stage silicone rubber shed.

3) It has good compatibility with the existing 10kV distribution line straight pole cross-arm connection, and is convenient for upgrading the existing vertical insulators. It has been proved by practice that it has a significant effect in improving the safety and operation convenience of the distribution line.

Description of drawings

Fig. 1 is the schematic front view of the utility model embodiment structure;

Fig. 2 is a schematic side view of the structure of the utility model embodiment;

Fig. 3 is the front view of the installation state of the utility model embodiment;

Fig. 4 is a side view of the installation state of the embodiment of the utility model.

In the figure: 1- gland bolt, 2- wire gland, 3- wire, 4- wire seat, 5- U-shaped shed, 6- middle shed, 7- lower shed, 8- insulating rod, 9- Spring washer, 10-nut, 11-cross arm connection sleeve, 12-iron cross arm, 13-insulation sleeve body, 14-umbrella base, 15-umbrella edge, 16-opening.

detailed description

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

See Figures 1 to 4, which are schematic diagrams of the embodiment of the 10kV anti-pollution flashover vertical composite insulator of the present invention. The insulating rod 8 is provided with a silicone rubber shed. The connecting sleeve 11 is connected to the iron cross arm 12, the wire holder 4 is matched with the wire gland 2 and the gland bolt 1, and the wire holder 4 is provided with an arc-shaped depression to facilitate the positioning of the wire 3, and the depth a of the arc-shaped depression is 8~10mm , the radius R of the arc-shaped depression is 15~20mm, the specification of the gland bolt 1 is M8, and the quantity is 2 pieces, and the applicable specification range of the wire 3 is 120mm ² ~300mm ² . The cross-arm connecting sleeve 11 is matched with the nut 10 and the spring washer 9, and the specification of the nut 10 is M18.

The silicone rubber shed of the present utility model is a combination of multiple sheds, including the U-shaped shed 5 at the top, the middle shed 6 in the middle, the lower shed 7 at the bottom, and the U-shaped shed 5 and the middle shed. The shed 6 , the insulating sheath 13 of the lower shed 7 , and the structure of the U-shaped shed includes an umbrella base 14 and an umbrella edge 15 . The umbrella base 14 has an inclination angle with a high center and a low periphery, and its inclination angle β is 2-4°, in order to prevent rainwater from accumulating. The umbrella edge 15 is located at two opposite edge extensions of the umbrella base, and the umbrella edge is bent upward to form openings 16 on both sides of the U-shaped umbrella skirt. The opening direction is consistent with the extending direction of the wire. Bear 12, thereby put an end to the short circuit generation between lead wire and iron cross arm.

In the embodiment, the upward bending height L of the umbrella edge 15 is 35-40 mm, the maximum edge distance H1 of the umbrella edge after bending is 160-165 mm, and the maximum edge distance H2 of the skirt edge on the opening side is 160-165 mm; the U-shaped umbrella skirt The distance h1 between the root and the middle shed is 35~40mm, the distance h2 between the root of the middle shed and the lower shed is 30~35mm, the outer diameter of the middle shed is D1, which is 115~120mm, and the outer diameter of the lower shed is D2 It is 140~145mm. For 10kV distribution lines, this size combination can fully meet its support and insulation requirements, and the operation safety, convenience and economy are optimal.

In order to further improve the insulation performance of the composite insulator of the present invention, the insulating sleeve body 13 can extend upwards to the surface of the wire holder 4, and extend downwards to the surface of the cross-arm connecting sleeve 11. The connection mode of the insulating sleeve body, the wire base and the cross-arm connecting sleeve For gluing or vulcanization, this method can avoid the discharge phenomenon caused by too much exposed surface of the metal fittings and improve safety. At the same time, the electrical performance index of the silicone rubber shed material is required: the AC withstand voltage is greater than 30kV, and the DC withstand voltage is greater than 70kV.

In order to further improve the strength performance of the composite insulator of the present invention, the insulating rod 8 adopts epoxy resin glass fiber reinforced composite polymer mandrel, and the connection between the end of the insulating rod and the wire seat 4 and the cross-arm connecting sleeve 11 is vulcanized. It is connected by machine cold crimping, which is tightly connected and not easy to loosen, and can be formed at one time before the shed is vulcanized, avoiding the long cycle and surface pollution caused by other connection methods. The utility model requires the hardness of the silicone rubber umbrella skirt to be 60-75 degrees Shore hardness, which can ensure that the umbrella skirt will not lose its function due to deformation under the condition of strong wind, especially the U-shaped umbrella skirt at the top. It is crucial to maintain the function realization of the composite insulator of the present invention.

The above embodiments are only specific examples selected for the purpose of the utility model, technical solutions and beneficial effects in detail, but should not limit the scope of protection of the utility model. , the various modifications, equivalent replacements and improvements should fall within the protection scope of the present utility model.

Claims (6)

1. nullThe vertical composite insulator of 1.10kV antifouling work，Including wire seat、Insulating bar、Silicon rubber umbrella skirt and cross-arm adapter sleeve composition，The two ends of insulating bar connect wire seat and cross-arm adapter sleeve respectively，Silicon rubber umbrella skirt is located on the outer surface of insulating bar，Described wire seat connects wire，Described cross-arm adapter sleeve connects straight line pole cross-arm，It is characterized in that，Described silicon rubber umbrella skirt includes the U-shaped full skirt being positioned at top、It is positioned at the middle full skirt at middle part、It is positioned at the lower full skirt of bottom，And connect U-shaped full skirt and middle full skirt、The insulation body of lower full skirt，The structure of described U-shaped full skirt includes umbrella base portion and umbrella edge，Described umbrella base portion has the angle of inclination that middle high periphery is low，Described umbrella edge is positioned at two opposite edges elongated ends of umbrella base portion，Described umbrella is along being folded upward at being formed the both-side opening of U-shaped full skirt，Described opening direction is consistent with the extending direction of wire.
2. 2. the vertical composite insulator of 10kV antifouling work according to claim 1, it is characterised in that described umbrella is 35 ~ 40mm along being folded upward at height L, and after bending, the maximum back gauge H1 on umbrella edge is 160 ~ 165mm, and the maximum back gauge H2 in shirt rim of described open side is 160 ~ 165mm；The spacing h1 of described U-shaped full skirt root and middle full skirt is 35 ~ 40mm, and the spacing h2 of described middle full skirt root and lower full skirt is 30 ~ 35mm, and the external diameter of described middle full skirt is D1 is 115 ~ 120mm, and the external diameter of described lower full skirt is D2 is 140 ~ 145mm.
3. 3. the vertical composite insulator of 10kV antifouling work according to claim 1, it is characterized in that, described wire seat is supporting with wire gland and gland bolt, wire seat is provided with the arc-shaped recess being easy to wire location, the degree of depth a of described arc-shaped recess is 8 ~ 10mm, the radius R of arc-shaped recess is 15 ~ 20mm, and described gland bolt specification is M8, and quantity is 2.
4. 4. the vertical composite insulator of 10kV antifouling work according to claim 1, it is characterised in that described cross-arm adapter sleeve and nut, spring washer are supporting, and described nut specification is M18.
5. 5. the vertical composite insulator of 10kV antifouling work according to claim 1, it is characterized in that, described insulation body extends upwardly to wire seat surface, extends downward cross-arm adapter sleeve surface, and insulation body and the connected mode of wire seat and cross-arm adapter sleeve are gluing or sulfuration.
6. 6. the vertical composite insulator of 10kV antifouling work according to claim 1, it is characterized in that, described insulating bar is the polymer plug that epoxy resin fiberglass enhancing is compound, and the connection of the end of insulating bar and wire seat and cross-arm adapter sleeve all adopts the mode of vulcanizer cold weld to connect.