CN201449853U

CN201449853U - Back side voltage-regulating anti-creep high-voltage coil

Info

Publication number: CN201449853U
Application number: CN200920031510XU
Authority: CN
Inventors: 路卫涛; 刘海东; 谢旭辉
Original assignee: Jinan Zhiheng Special Type Transformer Co Ltd
Current assignee: Ji'nan Jibian Zhiheng Electrical Equipment Co., Ltd.
Priority date: 2009-08-05
Filing date: 2009-08-05
Publication date: 2010-05-05
Anticipated expiration: 2019-08-05

Abstract

The utility model relates to the field of dry-type transformers, in particular to a back side voltage-regulating anti-creep high-voltage coil, which comprises a high-voltage coil body, a high-voltage coil disc is arranged in the high-voltage coil body, a first trapezoidal lug boss is formed on the surface of the high-voltage coil body on the high-voltage side of the high-voltage coil disc, a second trapezoidal lug boss is formed on the surface of the high-voltage coil body on the low-voltage side of the high-voltage coil disc, the first trapezoidal lug boss and the second trapezoidal lug boss are formed on the two sides of the high-voltage coil disc oppositely, the head end and the tail end of the coil are arranged on the first trapezoidal lug boss, and a voltage regulation tapping terminal is arranged on the second trapezoidal lug boss. In the utility model, the creepage distance between the head end and the tail end of the coil and the creepage distance between the head end and the voltage regulation tapping terminal are increased, the difficult problem that the creeping discharge or flashover discharge is possibly caused due to over high voltage creep creepage among terminals on the surface of the high-voltage coil of the high-voltage small-capacity dry type transformer is solved, and the safety and the stability of the running of a power system are ensured.

Description

Backside pressure regulating anti-creepage high voltage coil

Technical field

The utility model relates to the dry-type transformer field, specifically a kind of backside pressure regulating anti-creepage high voltage coil.

Background technology

Usually, the coil head end of transformer high-voltage coil, coil end and pressure regulation tap terminals all are arranged in the same side of coil.For the transformer below the 10kV grade 100kVA capacity, because coil height is limited, when overvoltage or thunder and lightning invasion appearred in short-term in electrical network, the phenomenon of discharging along high-tension coil surface creepage or flashover may appear between adjacent coil head end, coil end and the pressure regulation tap terminals.Existing technology is to strengthen creepage distance by the binding post frustum cone height that increases coil head end, coil end, but too high round platform intensity is relatively poor, when long-time running, because the influence of variations in temperature and vibrations makes the root of round platform produce slight crack easily, gives the stable hidden danger of bringing of operation of power networks.Increasing round platform has simultaneously also increased the difficulty of processing and the pouring technology difficulty of transformer manufacturing firm casting mold.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art a kind of backside pressure regulating anti-creepage high voltage coil is provided, creepage distance between each binding post of coil is increased considerably, prevent the generation of the creepage or flashover electric discharge phenomena of coil surface, guarantee that safe operation of electric network is stable.

The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be: this kind backside pressure regulating anti-creepage high voltage coil, comprise the high-tension coil body, be provided with the high-voltage line cake in the high-tension coil body interior, describedly form first trapezoid boss at the on high-tension side high-tension coil body surface of high-voltage line cake, high-tension coil body surface in high-voltage line cake low-pressure side forms second trapezoid boss, first trapezoid boss and second trapezoid boss are oppositely arranged in high-tension coil body both sides, coil head end and coil end are located on first trapezoid boss, and the pressure regulation tap terminals is located on second trapezoid boss.

Described coil head end and coil end are located at the axial two ends of first trapezoid boss respectively; The pressure regulation tap terminals is located at the axial centre of second trapezoid boss.

Described pressure regulation tap terminals is three pairs, is equipped with the silicon rubber insulation plug on it respectively.

The beneficial effects of the utility model are: coil head, end two ends and pressure regulation tap terminals are separately positioned on first trapezoid boss and second trapezoid boss of the high-pressure side of high-voltage line cake and low-pressure side, first trapezoid boss and second trapezoid boss are oppositely arranged in high-tension coil body both sides, constant at the coil axial height, increased the adjacent windings head end under the constant situation of binding post frustum cone height, creepage distance between coil end and the pressure regulation tap terminals, thoroughly solved high voltage, easily produce the difficult problem of creeping discharge or flashover discharge along the face overtension between the terminal of small-capacity dry-type transformer high-tension coil surface, the assurance safe operation of electric network is stable, simultaneously, on the pressure regulation tap terminals, be nested with the silicon rubber insulation plug, both can avoid the danger of getting an electric shock, can prevent the intrusion of dust again, reduce the unsafe factor of harm power grid operation.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A-A cutaway view among Fig. 1.

Fig. 3 is the vertical view of Fig. 1.

Fig. 4 is the rearview of Fig. 1.

Among the figure: 1, high-tension coil body; 11, first trapezoid boss; 12, second trapezoid boss; 2, high-voltage line cake; 3, coil head end, 4, coil end; 5, pressure regulation tap terminals.

Embodiment

Shown in Fig. 1～4, the utility model comprises high-tension coil body 1, be provided with high-voltage line cake 2 in high-tension coil body 1 inside, described at high-voltage line cake 2 on high-tension side high-tension coil bodies 1 surface formation first trapezoid boss 11, high-tension coil body 1 surface in high-voltage line cake 2 low-pressure sides forms second trapezoid boss 12, first trapezoid boss 11 and second trapezoid boss 12 are oppositely arranged in high-tension coil body 1 both sides, coil head end 3 and coil end 4 are located on first trapezoid boss 11, and pressure regulation tap terminals 5 is located on second trapezoid boss 12.Because coil head end 3 and coil end 4 lay respectively at high-tension coil body 1 both sides with pressure regulation tap terminals 5, make the creepage distance between coil head end 3, coil end 4 and pressure regulation tap terminals 5 threes increase considerably, the high-tension coil surface along the face field intensity far below standard-required, the insulation property of transformer have been guaranteed, thoroughly solved between high voltage, small-capacity dry-type transformer high-tension coil surface terminal and easily produced the difficult problem of creeping discharge or flashover discharge, guaranteed the safe and stable operation of electrical network along the face overtension.

Described coil head end 3 and coil end 4 are located at the axial two ends of first trapezoid boss 11 respectively; Pressure regulation tap terminals 5 is located at the axial centre of second trapezoid boss 12.Can farthest make three's dispersed placement like this, increase triangular creepage distance.

Described pressure regulation tap terminals 5 is three pairs, totally six, because the 5 same times of pressure regulation tap terminals only use a pair of, for safety, on the pressure regulation tap terminals 5 of free time, be nested with the silicon rubber insulation plug, both can avoid the danger of getting an electric shock, can prevent the intrusion of dust again, reduce the unsafe factor of harm power grid operation.

Claims

1. backside pressure regulating anti-creepage high voltage coil, comprise the high-tension coil body, be provided with the high-voltage line cake in the high-tension coil body interior, it is characterized in that, describedly form first trapezoid boss at the on high-tension side high-tension coil body surface of high-voltage line cake, high-tension coil body surface in high-voltage line cake low-pressure side forms second trapezoid boss, first trapezoid boss and second trapezoid boss are oppositely arranged in high-tension coil body both sides, coil head end and coil end are located on first trapezoid boss, and the pressure regulation tap terminals is located on second trapezoid boss.

2. backside pressure regulating anti-creepage high voltage coil according to claim 1 is characterized in that, described coil head end and coil end are located at the axial two ends of first trapezoid boss respectively; The pressure regulation tap terminals is located at the axial centre of second trapezoid boss.

3. backside pressure regulating anti-creepage high voltage coil according to claim 1 is characterized in that, described pressure regulation tap terminals is three pairs, is equipped with the silicon rubber insulation plug on it respectively.