CN201178017Y

CN201178017Y - Balance tube for transformer connecting between pillars

Info

Publication number: CN201178017Y
Application number: CNU2007201384269U
Authority: CN
Inventors: 赵峰; 王凯; 冉庆凯; 刘东升; 张海蛟
Original assignee: Baoding Tianwei Group Co Ltd
Current assignee: Baoding Tianwei Group Co Ltd
Priority date: 2007-12-28
Filing date: 2007-12-28
Publication date: 2009-01-07
Anticipated expiration: 2017-12-28

Abstract

The utility model relates to a transformer intercolumnar connection voltage-equalizing tube, which belongs to the technical field of transformers and solves the problems of intercolumnar connection of the ultra-high voltage high-capacity transformers. The technical proposal is as follows: the transformer intercolumnar connection voltage-equalizing tube comprises an intermediate tube and two end tubes respectively connected with the two ends thereof. Each end tube is positioned at the root part of a coil lead wire. The intermediate tube is formed by assembling two semi-circular tubes, wherein each semi-circular tube is connected with the two end tubes via bolts. The end tubes are electrically connected with the coil lead wires therein via isopotential wires. The transformer intercolumnar connection voltage-equalizing tube has the advantages of good insulating property and small size, and can be installed inside the body of the high-capacity transformer to create conditions for the intercolumnar connection inside the transformer body.

Description

Line balance pipe between transformer pillar

Technical field

The utility model relates to a kind of balance pipe that is set in intercolumniation line outside in the extra-high-voltage large-capacity transf, belongs to the transformer technology field.

Background technology

In transformer, need to connect between the coil of different posts with lead.For the electric pressure lower position, can directly connect between the two post coils with lead-in wire.But for the high voltage position, directly connect as adopting lead-in wire, then can make electric field distortion owing to thin and the out-of-shape of going between, part position electric field raises, and causes partial discharge of transformer even puncture.Therefore, traditional pin configuration all is that lead-in wire is fixed on the fuel tank by insulated support at the outside cabling of device body.But, for extra-high-voltage large-capacity transf, because device body and winding volume increase, the whole Transporting condition has limited the increase of fuel tank size again, the device body is relative with the space between the fuel tank less, line electric pressure height between transformer pillar, thereby traditional connecting line construction in addition can't satisfy the line insulation required to fuel tank at all.

If directly adopt lead-in wire to connect between the two post coils, then must solve the electric field distortion problem, prevent to discharge or the generation of punch-through.The suit balance pipe can achieve the above object on lead-in wire, but existing balance pipe all be whole, direct insertion structure, and it is bigger to take up room, installs back from tank wall apart from closely, can't guarantee dielectric strength required between balance pipe and the oil tank wall.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of volume little, can be installed on line balance pipe between the transformer pillar of extra-high-voltage large-capacity transf device body inside.

Problem described in the utility model realizes with following technical proposals:

Line balance pipe between a kind of transformer pillar, it is made up of intervalve and dock with its two ends two end pipes 1, each end pipe 1 is set in the root of a post coil lead 11, described intervalve is combined into by two semicircle pipes 2, each semicircle pipe 2 is connected with two ends pipe 1 by screw 9, and end pipe 1 is electrically connected with its inner coil lead 11 by equipotential line 10.

Line balance pipe between above-mentioned transformer pillar, described end pipe 1 outside be suit insulation paper pulp 7 and multilayer insulation pipe successively, between insulation paper pulp 7 and the insulated tube, oil clearance and the stay in oil clearance spaced apart arranged between the adjacent two layers insulated tube.

Line balance pipe between above-mentioned transformer pillar, described intervalve outside are wrapped up insulating paper 8 and several layers insulation semicircle pipe successively, between the insulation semicircle pipe oil clearance and the stay in oil clearance spaced apart are arranged.

Line balance pipe between above-mentioned transformer pillar, described end pipe 1 attenuates with the link of intervalve, and the other end has flange 15.

The utility model adopts three sections split-type structurals, and its volume is reduced greatly, and is convenient to install, and outside insulating barrier is used to improve dielectric strength, and oil clearance can be balance pipe the cooling oil circuit is provided, and prevents that inner lead is overheated.The utility model is the insulation property height not only, and volume is little, can be installed on extra-high-voltage large-capacity transf device body inside, has created condition for carrying out the intercolumniation line in device body inside.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is a scheme of installation of the present utility model;

Fig. 2 is the cutaway view that has the end pipe of insulating barrier;

Fig. 3 is the cutaway view of the end pipe of not tape insulation layer;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 is the structure of intervalve;

Fig. 6 is the left view of Fig. 5;

Fig. 7 is the cutaway view of insulation semicircle pipe;

Fig. 8 is the A-A cutaway view of Fig. 7;

Fig. 9 is intervalve and end pipe connection diagram.

Each label is among the figure: each parts label among Fig. 1: 1, end pipe, 2, the semicircle pipe, 3, insulated tube, 4, insulation semicircle pipe, 5, the stay between the insulated tube, 6, the stay between the semi-insulating pipe, 7, insulation paper pulp, 8, insulating paper, 9, screw, 10, equipotential line, 11, coil lead, 12, the winding insulation paper web, 13 winding axle center, 14, copper nut, 15, flange.

Embodiment

Technical problem to be solved in the utility model be overcome superhigh pressure, space, 500kV shunt leads place, ultra-large capacity transformer end is little, the electric field height, thus a kind of operation of being convenient to is provided, satisfy the 500kV balance pipe of insulating requirements.

Referring to Fig. 1, the utility model adopts split-type structural, mainly is divided into three parts.Two ends pipe 1 is an overall structure, and intervalve is combined into by two semicircle pipes 2 for dividing body structure, and this structure is convenient to the lead-in wire connection and balance pipe is installed.Simultaneously, the utility model can be positioned as close to fuel tank major axis center line when installing, and guarantees that fuel tank has enough insulation distances, has solved the little problem in space.The utility model suits to adopt on extra-high-voltage large-capacity transf.

Referring to Fig. 2, the end pipe is made by diameter 120～180mm copper pipe for overall structure, copper pipe external application 4～20mm heavy insulation paper pulp, insulation paper pulp protects concentric insulated tube 3 outward, and insulated tube 3 is an insulating paper cylinder, add stay between paper web and end pipe and paper web and the paper web, paper web will hold the outer oil duct of pipe to be divided into small oil gap.

Referring to Fig. 3, Fig. 4, for making the end pipe smooth with the intervalve junction, the end pipe attenuates with the intervalve junction, and intervalve is enclosed within on the thin end of end pipe during connection, and the attachment screw hole is arranged at thin end.The other end of end pipe is provided with flange 15, and purpose is to make the end slyness, increases dielectric strength.

Referring to Fig. 5, Fig. 6, intervalve is combined into by two semicircle pipes, and respectively there is a screw hole at the two ends of each semicircle pipe.

Referring to Fig. 7, Fig. 8, the insulating barrier of intervalve outside is combined into by insulation semicircle pipe, so that install.

Installation step is as follows: a. installation end pipe 1; B. connecting coil 11 goes between; C. the equipotential line 10 usefulness bolts (providing during installation) between coil lead 11 and the end pipe are fixed on the copper nut 14 on the end pipe; D., intervalve is installed, fastening between semicircle pipe and the end pipe with screw 9; E. insulating paper 8 is wrapped in intervalve and intervalve and end pipe jointing part position; F adds stay and insulation semicircle pipe outside.

Claims

1, line balance pipe between a kind of transformer pillar, it is characterized in that, it is made up of intervalve and dock with its two ends two end pipes (1), each end pipe (1) is set in the root of a post coil lead (11), described intervalve is combined into by two semicircle pipes (2), each semicircle pipe (2) is connected with two ends pipes (1) by screw (9), and end pipe (1) is electrically connected with its inner coil lead (11) by equipotential line (10).

2, according to line balance pipe between the described transformer pillar of claim 1, it is characterized in that, described end pipe (1) outside is suit insulation paper pulp (7) and several layers insulated tube successively, insulate between paper pulp (7) and the insulated tube, oil clearance and the stay in oil clearance spaced apart arranged between the adjacent two layers insulated tube.

According to line balance pipe between claim 1 or 2 described transformer pillars, it is characterized in that 3, described intervalve outside is wrapped up insulating paper (8) and multilayer insulation semicircle pipe successively, between the insulation semicircle pipe oil clearance and the stay in oil clearance spaced apart are arranged.

According to line balance pipe between the described transformer pillar of claim 3, it is characterized in that 4, described end pipe (1) attenuates with the link of intervalve, the other end has flange (15).