CN214476888U

CN214476888U - 750kV transformer device of being qualified for next round of competitions

Info

Publication number: CN214476888U
Application number: CN202120089871.0U
Authority: CN
Inventors: 张晓阳; 丁立国; 柴孟东; 丁守涛
Original assignee: Shandong Power Equipment Co Ltd
Current assignee: Shandong Power Equipment Co Ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-10-22
Anticipated expiration: 2031-01-13

Abstract

The utility model relates to a 750kV transformer outlet device, which is of a novel direct-out type structure, and is arranged inside a transformer oil tank and positioned at a triangular space position formed by a main column of a transformer and a side column of the transformer; novel straight-out device of being qualified for next round of competitions includes: the voltage-sharing coil comprises a voltage-sharing ball and a voltage-sharing pipe which are arranged inside, the voltage-sharing pipe is connected with the outer surface of the high-voltage coil, and the voltage-sharing ball is connected with the high-voltage sleeve. The utility model discloses to the verification of electric field around the high-tension bushing equalizing ball, guarantee the design margin, design a novel directly-out formula device of being qualified for the next round of competitions that small, dielectric strength are high. The utility model discloses the triangle space between inside principal post of make full use of transformer and side post has reduced oil tank size and transformer weight, reduces the quantity of transformer oil and steel, reduces the use of raw and other materials, practices thrift the cost, improves product economic benefits. The position of the high-voltage bushing is changed, wiring is convenient, and the installation time is reduced.

Description

750kV transformer device of being qualified for next round of competitions

Technical Field

The utility model belongs to the technical field of the transformer manufacture, concretely relates to novel 750kV transformer is qualified for the next round of competitions device.

Background

The high-capacity high-voltage transformer is becoming a product model which is researched and developed by each manufacturer more and more. With the increase of overseas orders of companies, market competition is becoming more and more intense, and manufacturers strive to improve product performance and reduce manufacturing cost to obtain larger profit margins. Therefore, on the premise of ensuring technical parameters, the design structure is optimized, the use amount of transformer oil and steel is reduced, the transportation and installation sizes of the transformer are reduced, and the economical efficiency of the 750kV transformer is inevitably improved.

In the current high-voltage class alternating-current transformer, the traditional L-shaped trunk-type wire outlet device is mostly adopted for connecting the wire from the coil to the sleeve voltage-sharing ball part. As shown in fig. 1, which is a schematic diagram of an existing 750kV transformer outlet device, an outlet device 2 is arranged in an L-shaped trunk 1 at one side of a transformer, the outlet device 2 is located in the L-shaped trunk 1 with a larger volume, the L-shaped trunk 1 is connected with a transformer oil tank 4, and a transformer body 3 is integrally installed in the transformer oil tank 4. The wire outlet device not only consumes a large amount of steel, but also consumes a large amount of manpower and working hours in workshop installation, and also needs to be independently subjected to hot oil circulation, and meanwhile, the cost of the using amount of transformer oil is increased.

Disclosure of Invention

In order to reduce the overall dimension of transformer as far as possible, reduce manufacturing cost, the utility model relates to a novel 750kV transformer is qualified for the next round of competitions device. The utility model discloses the technical scheme who adopts as follows:

a wire outlet device of a 750kV transformer is of a novel direct-outlet type structure, is arranged inside an oil tank of the transformer and is positioned in a triangular space formed by a main column of the transformer and a side column of the transformer; novel straight-out device of being qualified for next round of competitions includes: the voltage-sharing coil comprises a voltage-sharing ball and a voltage-sharing tube which are arranged inside, the voltage-sharing ball is connected with the voltage-sharing tube and then connected with a lead through an equipotential line, the voltage-sharing tube is connected with the outer surface of the high-voltage coil, and the voltage-sharing ball is connected with the high-voltage sleeve.

Preferably, a lead is arranged in the voltage-sharing ball and the voltage-sharing tube, one end of the lead is connected with a wiring terminal of a high-voltage bushing in the voltage-sharing ball, and the other end of the lead is connected with a high-voltage coil outlet.

Preferably, a plurality of layers of insulating cylinders are arranged outside the voltage-sharing balls.

Preferably, the corrugated paper board, the first insulation bent pipe and the second insulation bent pipe are sequentially arranged on the outer side of the pressure equalizing pipe from inside to outside, and the first insulation bent pipe and the second insulation bent pipe are fixed through a supporting strip and a clamping plate.

The utility model has the advantages that:

the utility model makes full use of the triangular space between the main column and the side column inside the transformer, changes the traditional L-shaped trunk-type wire outlet device into a straight-out wire outlet device structure, reduces the size of the oil tank and the weight of the transformer, and reduces the transportation weight; the space utilization rate of the oil tank is improved, the volume of the oil tank is effectively reduced, the using amount of transformer oil and steel is reduced, the use amount of raw materials is reduced, the cost is saved, and the economic benefit of the product is improved. The position of the high-voltage bushing is changed, wiring is convenient, and the installation time is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are illustrative of some embodiments of the invention, and that those skilled in the art will be able to derive other drawings without inventive step from these drawings, which are within the scope of the present application.

FIG. 1 is a schematic diagram of a conventional 750kV transformer outlet device;

fig. 2 is a schematic diagram of a novel 750kV transformer outlet device according to an embodiment of the present invention;

fig. 3 is an installation front view of the straight-out type outlet device according to the embodiment of the present invention;

fig. 4 is an installation cross-sectional view of a straight-out outlet device according to an embodiment of the present invention;

in the figure: 1-L-shaped trunk, 2-wire outlet device, 3-transformer body, 4-transformer oil tank, 5-high-voltage bushing, 6-voltage equalizing ball, 7-insulating cylinder, 8-lead wire, 9-corrugated paperboard, 10-first insulating bent pipe, 11-stay and clamp plate, 12-second insulating bent pipe, 13-voltage equalizing pipe, 14-high-voltage coil outer surface, 15-novel straight-out wire outlet device, 16-transformer main column and 17-transformer side column.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them.

As shown in fig. 2, it is a schematic diagram of the structure of the novel 750kV transformer outgoing device according to the embodiment of the present invention. A wire outlet device of a 750kV transformer is of a novel direct-out type structure; the novel straight-out outlet device 15 includes: the voltage-sharing coil comprises a voltage-sharing ball 6 and a voltage-sharing tube 13 which are positioned inside, the voltage-sharing ball 6 is connected with the voltage-sharing tube 13 and then is connected with a lead 8 by an equipotential line, the voltage-sharing tube 13 is connected with an outer surface 14 of the high-voltage coil, and the voltage-sharing ball 6 is connected with the high-voltage sleeve 5. And a lead 8 is arranged in the voltage-sharing ball 6 and the voltage-sharing tube 13, one end of the lead 8 is connected with a wiring terminal of the high-voltage bushing 5 in the voltage-sharing ball 6, and the other end of the lead is connected with a high-voltage coil outlet. The structure can effectively shield the included angle and improve the electric field distribution around the lead 8.

The multilayer insulation cylinder 7 is arranged on the outer side of the pressure equalizing ball 6, the corrugated paper board 9, the first insulation bent pipe 10 and the second insulation bent pipe 12 are sequentially arranged on the outer side of the pressure equalizing pipe 13 from inside to outside, and the first insulation bent pipe 10 and the second insulation bent pipe 12 are fixed through a stay and a clamping board 11. The structure can integrally form a small oil gap of the thin paper tube, improve the insulating strength of unit distance and effectively reduce the insulating distance.

As shown in fig. 3, is an installation front view of the straight-out type outlet device according to the embodiment of the present invention; fig. 4 is a sectional view showing the installation of the straight-out outlet device according to the embodiment of the present invention. The novel straight-out type outlet device 15 is arranged inside the transformer oil tank 4 and is located in a triangular space position formed by a transformer main column 16 and a transformer side column 17. The utility model makes full use of the triangular space formed by the main column 16 and the side column 17 of the transformer, and moves the position of the novel straight-out type wire outlet device 15 from the L-shaped trunk of one side of the traditional transformer to the oil tank of the transformer body, thereby saving the larger L-shaped trunk and saving a large amount of steel; and the workshop installation saves a large amount of manpower and man-hour, saves the process of hot oil circulation alone, has still reduced the cost of transformer oil use amount, and manufacturing cost greatly reduced has generally reduced transformer transportation size simultaneously, has solved the long-distance transportation size and has restricted scheduling problem.

The utility model discloses an installation technology method of 750kV transformer device of being qualified for next round of competitions is as follows:

1. the design margin is ensured by verifying the electric field around the voltage-sharing ball of the high-voltage bushing, and a novel direct-out type wire outlet device with small volume and high insulating strength is designed;

2. design novel direct-out formula device of being qualified for next round of competitions concrete structure, include: the voltage-sharing ball and the voltage-sharing tube are internally provided with a lead, and the lead is connected with a high-voltage sleeve on the upper part of the voltage-sharing ball; the outside of pressure-equalizing ball sets up the insulating section of thick bamboo of multilayer, and the outside of pressure-equalizing pipe is from interior to exterior sets gradually corrugated paper board, first insulation return bend, the insulating return bend of second, and it is fixed through stay and cardboard between first insulation return bend and the insulating return bend of second.

The novel straight-out type wire outlet device can shield an included angle and improve the electric field distribution around the lead; the insulating strength of unit distance is improved, and the insulating distance is effectively reduced.

3. The voltage-sharing tube is connected with the outer surface of the high-voltage coil, the voltage-sharing ball is connected with the high-voltage sleeve, and the novel direct-out type wire outlet device is arranged at a triangular space position formed by a main transformer column and a side transformer column inside the transformer oil tank. The utility model discloses the triangle space between make full use of principal post and side post has saved traditional great L type "trunk", saves steel, easy to assemble, saves process, reduction manufacturing cost, the reduction transportation size of hot oil circulation alone.

Finally, it is to be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. The outgoing device of the 750kV transformer is characterized in that the outgoing device is of a novel direct-out type structure, and a novel direct-out type outgoing device (15) is arranged inside a transformer oil tank (4) and is located in a triangular space position formed by a transformer main column (16) and a transformer side column (17); the novel straight-out outlet device (15) comprises: the voltage-sharing structure comprises a voltage-sharing ball (6) and a voltage-sharing tube (13) which are positioned inside, wherein the voltage-sharing ball (6) is connected with the voltage-sharing tube (13) and then is connected with a lead (8) by an equipotential line.

2. The outgoing device of the 750kV transformer according to claim 1, wherein a lead (8) is arranged in the voltage-sharing ball (6) and the voltage-sharing tube (13), one end of the lead (8) is connected with a connecting terminal of a high-voltage bushing (5) inside the voltage-sharing ball (6), and the other end of the lead is connected with an outgoing end of a high-voltage coil.

3. The outgoing device of a 750kV transformer as claimed in claim 2, wherein a multi-layer insulating cylinder (7) is arranged outside the voltage-sharing ball (6).

4. The outgoing line device of the 750kV transformer according to claim 2, wherein a corrugated paper board (9), a first insulating bent pipe (10) and a second insulating bent pipe (12) are sequentially arranged on the outer side of the voltage-sharing pipe (13) from inside to outside, and the first insulating bent pipe (10) and the second insulating bent pipe (12) are fixed through a stay and a clamping board (11).