An insulator with enhanced internal insulation

Abstract

An inner-insulation enhanced insulator is applied to the lead wire of a high-voltage control device, and includes mounting flanges installed at the upper and lower ends of an insulation support system, and an outer insulation system located outside the insulation support system. An inner insulation system is arranged inside the insulation support system; the inner insulation system includes an inner skin insulation layer, and spiral umbrella skirts are arranged on the inner skin insulation layer; the edge of the inner spiral umbrella skirt of the spiral umbrella skirt is higher than the root of the inner spiral umbrella skirt and is arc-connected; the present invention adopts an inner spiral enhanced umbrella skirt, which increases the creepage distance along the surface of the inner surface of the insulator. The edge of the inner spiral umbrella skirt is higher than the root and is arc-connected, which is convenient for placing the control lead wire and can increase the creepage distance of the control lead wire in the inner spiral umbrella skirt. Therefore, the height of the inner-insulation enhanced insulator can be optimized, the purpose of saving materials and costs can be achieved, and the exposure of the control lead wire can be avoided, preventing aging and damage.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power, and particularly relates to an inner insulation enhanced insulator. Background Art

[0002] With the continuous increase of power grid capacity, many new types of equipment have emerged. The control devices of some equipment are directly connected to high-voltage equipment. The equipment and the control device are made equipotential. At the same time, some control lead-out wires in the control device are led outwards and connected to the central control room through a low-potential area. Usually, as Figure 4 shown, multiple post insulators and wall bushings are used to strengthen the ground insulation and creepage distance of this part of the control lead-out wire. The control lead-out wire is wrapped with a protective material to prevent aging and being bitten by small animals. Therefore, the amount of material used is increased, the floor area of the equipment is increased, and at the same time, the aesthetics of wiring is affected, which is not economical and practical. Summary of the Invention

[0003] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide an inner insulation enhanced insulator, which increases the creepage distance on the inner surface of the insulator, reduces the usage amount of external insulators and protective materials, and can prevent the aging and damage of control lead-out wires.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An inner insulation enhanced insulator is applied to the lead-out wire of a control device with high voltage, and includes mounting flanges 1 installed at the upper and lower ends of an insulation support system 3, and an outer insulation system 2 located outside the insulation support system 3. An inner insulation system 4 is arranged inside the insulation support system 3; the inner insulation system 4 includes an inner skin insulation layer 401, and a spiral umbrella skirt 402 is arranged on the inner skin insulation layer 401; the inner spiral umbrella skirt edge 403 of the spiral umbrella skirt 402 is higher than the inner spiral umbrella skirt root 404 and is arc-connected.

[0006] The skirt width of the spiral umbrella skirt 402 is adapted to lead-out wires of various models and can spiral and wind the control lead-out wire 5.

[0007] The mounting flange 1 includes an upper mounting flange 101 and a lower mounting flange 102. The upper mounting flange 101 is located above the insulation support system 3, and the lower mounting flange 102 is located below the insulation support system 3; the upper mounting flange 101 and the lower mounting flange 102 are directly cast and integrally formed with the insulation support system 3.

[0008] Both the upper mounting flange 101 and the lower mounting flange 102 are provided with mounting holes 103 and center holes 104.

[0009] The described external insulation system 2 includes an outer skin insulation layer 201, on which large umbrella skirts 202 and small umbrella skirts 203 are arranged at intervals; the outer skin insulation layer 201, the large umbrella skirts 202 and the small umbrella skirts 203 are integrally formed by die casting.

[0010] For the above-mentioned inner skin insulation layer 401, the spiral umbrella skirt 402 is integrally formed by die casting.

[0011] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0012] 1. In the present invention, the inner insulation adopts a strengthened inner spiral umbrella skirt 402, and the inner spiral umbrella skirt 402 increases the creepage distance along the surface of the inner surface of the insulator.

[0013] 2. In the present invention, the edge 403 of the inner spiral umbrella skirt of the inner spiral umbrella skirt 402 is higher than the root 404 of the inner spiral umbrella skirt and is arc-connected, so that the control lead-out wire 5 with high voltage can be spirally placed at the root 404 of the inner umbrella skirt, thereby increasing the creepage distance of the control lead-out wire 5 in the inner spiral umbrella skirt 402.

[0014] 3. As described in 1 and 2 above, the adoption of the inner spiral umbrella skirt 402 in the present invention not only increases the creepage distance of the inner surface of the insulator, but also increases the creepage distance of the control lead-out wire 5 in the inner spiral umbrella skirt 402. Therefore, the height of the inner insulation strengthened insulator 6 can be optimized to achieve the purpose of saving materials and costs.

[0015] 4. In the present invention, the control lead-out wire 5 spirally passes through the inner spiral umbrella skirt 402, which not only reduces the usage amount of the external insulator and the wrapping material, but also avoids the exposure of the control lead-out wire 5, prevents aging and being gnawed by small animals, and also achieves the effects of reducing the floor area, saving costs and being beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a sectional view of an inner insulation strengthened insulator.

[0017] Figure 2 It is a sectional view of the inner spiral umbrella skirt of the inner insulation strengthened insulator.

[0018] Figure 3 It is a sectional view of the lead-out wire arrangement of the inner spiral umbrella skirt of the inner insulation strengthened insulator.

[0019] Figure 4 It is a wiring method and insulator layout diagram when using a conventional insulator.

[0020] Figure 5 It is a wiring method and insulator layout diagram when using the inner insulation enhanced insulator of the present invention.

[0021] In the figure: 1 - mounting flange, 101 - lower mounting flange, 102 - upper mounting flange, 2 - outer insulation system, 201 - outer skin insulation layer, 202 - large umbrella skirt, 203 - small umbrella skirt, 3 - insulation support system, 4 - inner insulation system, 401 - inner skin insulation layer, 402 - inner spiral umbrella skirt, 403 - edge of inner spiral umbrella skirt, 404 - root of inner spiral umbrella skirt, 5 - control lead wire, 6 - inner insulation reinforced insulator, 7 - high-voltage wire, 8 - wall bushing, 9 - control box, 10 - power electronic device, 11 - ordinary post insulator. Detailed implementation mode

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description involves the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are only examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0024] An insulator is a device installed between conductors at different potentials or between a conductor and a ground potential component, which can withstand voltage and mechanical stress and plays an important role in the power system. The insulator should not fail due to various mechanical and electrical stresses caused by changes in environmental and electrical load conditions, otherwise a short-circuit fault will occur. In the embodiments of the present invention, taking the MCR type SVC valve bank box as an example, the inner insulation reinforced insulator is applied to the voltage class of 6 - 220 kV.

[0025] Referring to Figure 1 , an inner insulation reinforced insulator, which is applied to the lead wire of a control device with high voltage, includes a mounting flange 1, an outer insulation system 2, an insulation support system 3 and an inner insulation system 4.

[0026] Among them:

[0027] The insulation support system 3 is a hollow insulation cylinder;

[0028] The mounting flange 1 includes an upper mounting flange 101 and a lower mounting flange 102;

[0029] The upper mounting flange 101 is located above the insulation support system 3, and the lower mounting flange 102 is located below the insulation support system 3;

[0030] The outer insulation system 2 is located outside the insulation support system 3;

[0031] The inner insulation system 4 is located inside the insulation support system 3.

[0032] The outer insulation system 2 includes an outer skin insulation layer 201, on which large umbrella skirts 202 and small umbrella skirts 203 are arranged at intervals.

[0033] Refer to Figure 2 , Figure 3 , the inner insulation system 4 includes an inner skin insulation layer 401, on which a spiral umbrella skirt 402 is arranged. The inner spiral umbrella skirt edge 403 of the spiral umbrella skirt 402 is higher than the inner spiral umbrella skirt root 404 and is arc-connected, so that the high-voltage control lead-out wire 5 can be spirally placed at the inner umbrella skirt root 404, thereby increasing the creepage distance of the control lead-out wire 5 in the inner spiral umbrella skirt 402.

[0034] The skirt width of the spiral umbrella skirt 402 is adapted to various types of lead-out wires, facilitating the coiling and placement of the control lead-out wire 5 so that the control lead-out wire 5 is spirally coiled on the spiral umbrella skirt 402.

[0035] The upper mounting flange 101 and the lower mounting flange 102 are directly integrally cast with the insulation support system 3.

[0036] The above-mentioned outer skin insulation layer 201, large umbrella skirts 202, and small umbrella skirts 203 are integrally cast by a mold.

[0037] The above-mentioned inner skin insulation layer 401 and spiral umbrella skirt 402 are integrally cast by a mold.

[0038] The upper mounting flange 101 and the lower mounting flange 102 are both provided with mounting holes 103 and central holes 104.

[0039] The working principle of the present invention is as follows:

[0040] The control lead-out wire 5 spirally passes through the inner spiral umbrella skirt 402. Since the inner spiral umbrella skirt edge 403 of the inner spiral umbrella skirt 402 is higher than the inner spiral umbrella skirt root 404 and is arc-connected, and the skirt width of the spiral umbrella skirt 402 is adapted to various types of lead-out wires; the high-voltage control lead-out wire 5 can be spirally placed at the inner umbrella skirt root 404, thereby increasing the creepage distance of the control lead-out wire 5 in the inner spiral umbrella skirt 402.

[0041] Figure 4 Shows the wire outlet mode and insulator layout diagram when the MCR type SVC valve bank box uses a conventional insulator; Figure 5The outgoing line mode and insulator layout diagram of the MCR type SVC valve bank box provided by the embodiment of the present invention when using the inner insulation enhanced insulator are shown. From Figure 5 it can be seen that the high-voltage wire 7 passes through the wall bushing 8 and is connected to the power electronic device 10 in the control box 9, and the control lead-out wire 5 of the power electronic device 10 is led out through the inner insulation enhanced insulator 6.

[0042] Figure 5 Compared with Figure 4 the original ordinary post insulator 11 at the bottom of the control box 9 is replaced with the inner insulation enhanced insulator 6 of the present invention, reducing one wall bushing 8 and two ordinary post insulators 11, reducing the material use and floor area, and reducing the exposed part of the control lead-out wire 5. Therefore, the control lead protection material is also correspondingly reduced.

[0043] Those skilled in the art will readily think of other embodiments of the present invention after considering the specification and the disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include the common general knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0044] It should be understood that the present invention is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

[0045] The above are only the preferred embodiments of the present invention, and do not impose any limitations on the present invention. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An inner-insulation enhanced insulator is applied to the lead wire of a control device with high voltage, and includes mounting flanges (1) installed at the upper and lower ends of an insulation support system (3), and an outer insulation system (2) located outside the insulation support system (3). It is characterized in that, An inner insulation system (4) is arranged inside the insulation support system (3); the inner insulation system (4) includes an inner skin insulation layer (401), and a spiral umbrella skirt (402) is arranged on the inner skin insulation layer (401); the inner spiral umbrella skirt edge (403) of the spiral umbrella skirt (402) is higher than the inner spiral umbrella skirt root (404) and is arc-connected. The skirt width of the spiral umbrella skirt (402) is adapted to various types of lead wires and can spiral and coil to control the lead wire (5). The mounting flange (1) includes an upper mounting flange (101) and a lower mounting flange (102). The upper mounting flange (101) is located above the insulation support system (3), and the lower mounting flange (102) is located below the insulation support system (3); the upper mounting flange (101) and the lower mounting flange (102) are directly cast and integrally formed with the insulation support system (3). Both the upper mounting flange (101) and the lower mounting flange (102) are provided with mounting holes (103) and center holes (104). The outer insulation system (2) includes an outer skin insulation layer (201), and large umbrella skirts (202) and small umbrella skirts (203) are arranged at intervals on the outer skin insulation layer (201); the outer skin insulation layer (201), the large umbrella skirts (202), and the small umbrella skirts (203) are integrally formed by die casting. The inner skin insulation layer (401) and the spiral umbrella skirt (402) are integrally formed by die casting.

Images