CN201311832Y

CN201311832Y - Dry-type transformer low pressure side sealing and insulating device

Info

Publication number: CN201311832Y
Application number: CNU2008201676435U
Authority: CN
Inventors: 赵西平
Original assignee: Zhejiang Guangtian Transformer Co Ltd
Current assignee: Zhejiang Guangtian Transformer Co Ltd
Priority date: 2008-11-07
Filing date: 2008-11-07
Publication date: 2009-09-16
Anticipated expiration: 2018-11-07

Abstract

A dry-type transformer low pressure side sealing and insulating device comprises a high-pressure coil casting body, a low-pressure coil casting body, an iron core mounted on the inner side of the low-pressure coil casting body, and an upper clamp piece and a lower clamp piece for fixing the high-pressure coil casting body and the low-pressure coil casting body, wherein the low-pressure coil casting body is provided with a head-outlet wire, the head-outlet wire is welded with a copper head-outlet bar, and the copper head-outlet bar is connected with an outer wire. The dry-type transformer low pressure side sealing and insulating device is characterized in that an insulating casing is mounted outside the copper head-outlet bar, and the insulating casing and the low-pressure coil casting body are integrally casted. The technical proposal not only guarantees the whole seal and insulation of the root portion of the copper head-outlet bar, but also can lead the copper head-outlet bar to be excellently fixed on the low-pressure coil casting body, solves the problems that the root of a head outlet wire on the low pressure side of a dry-type transformer is easy to be in short circuit under worse environment, and guarantees the electrical conductance, and the insulating state of the dry-type transformer is stable, protection to ground and the grounding of the wire outlet head are stable, and the operation of the transformer is led to be safer and more reliable.

Description

Dry-type transformer low-pressure side sealed insulation device

Technical field

The utility model relates to dry-type transformer, particularly relates to dry-type transformer low-pressure side sealed insulation device, belongs to field of electrical equipment.

Background technology

At present, in the dry-type transformer product, two kinds of methods of the general employing of low-pressure side lead-out wire mode: the one, adopt and directly draw the lead mode, to draw lead and connect laggard capable insulation processing, the epoxy casting place of the transformer leading-out terminal of this lead-out wire mode, occur cracking phenomena easily in assembling process, and operation is complicated, technological level directly influences the insulation property of dry-type transformer and the safety of use; The 2nd, adopt soldering copper to lift one's head row's outlet method and replace plain conductor; from connecting; the coil outlet method; the processing mode of insulation; more than two kinds of outlet methods (as: surrounding environment is moist than condition of severe at environment; air humidity is higher; easily produce condensation and solid foreign materials and mouse; snake; toys such as cat enter and cobweb etc.); the dry-type transformer reliability of operation will be had a strong impact on; then cause a series of problems of transformer; the electric conductivity deterioration of transformer for example; the state of insulation instability, and the ground protection performance of transformer leading-out terminal is also unstable.

Summary of the invention

The purpose of this utility model is in order to overcome the shortcoming of prior art; provide a kind of dry-type transformer low-pressure side to lift one's head the lead root and be not easy short circuit; electric conductivity is protected; the state of insulation of transformer is stable; terminal protective earthing over the ground is stable, the dry-type transformer low-pressure side sealed insulation device that the transformer operation is safer.

The technical scheme of the utility model dry-type transformer low-pressure side sealed insulation device is: comprise high-tension coil pour mass, low-voltage coil pour mass, be installed in the iron core of low-voltage coil pour mass inboard, and fixedly the upper clamping piece and the lower clamping piece of high and low pressure coil pour mass are formed, the low-voltage coil pour mass has the lead of lifting one's head, the wire bonds copper of lifting one's head is lifted one's head row, copper is lifted one's head Volleyball Association and is connect outside line, it is characterized in that described copper lift one's head exclusive insulating sleeve is installed, insulating sleeve is poured into a mould with low-voltage coil pour mass one.

Dry-type transformer low-pressure side sealed insulation device of the present utility model; copper lift one's head exclusive insulating sleeve is installed; and insulating sleeve is to be cast in low-voltage coil pour mass one; guaranteed that so not only copper lifts one's head the hermetically sealed insulation of arranging root; can also make copper lift one's head row better is fixed on the low-voltage coil pour mass (because the associativity of insulating sleeve and resin is very strong; pour into a mould than firm many of naked copper row cast so put behind the insulating sleeve again) with low-voltage coil; having solved the dry-type transformer low-pressure side lifts one's head the lead root (surrounding environment is moist at relatively poor environment easily; air humidity is higher) following problem of short-circuit; electric conductivity is protected; the state of insulation of dry-type transformer is stable; terminal protective earthing over the ground is stable, makes the operation of transformer more safe and reliable.

Dry-type transformer low-pressure side sealed insulation device of the present utility model, its described insulating sleeve can be silica gel sheath or heat-shrink tube, silica gel sheath is made by silica gel material, have good resilience, free rollover characteristics, be convenient to install, the heat-shrink tube cladding can have good high-and low-temperature resistance, electrical insulating property on electric component.

Description of drawings

Fig. 1 be this practical insulating sleeve be installed in copper lift one's head exclusive and with low-voltage coil pour mass one cast schematic diagram;

Fig. 2 is sealed insulation device of the present utility model and dry-type transformer scheme of installation;

Fig. 3 is the local enlarged diagram in A place of Fig. 2.

Embodiment

The utility model relates to dry-type transformer low-pressure side sealed insulation device, as shown in Figure 1-Figure 3, comprise high-tension coil pour mass 1, low-voltage coil pour mass 2, be installed in the iron core 3 of low-voltage coil pour mass 2 inboards, and fixedly the upper clamping piece 4 and the lower clamping piece 5 of high and low pressure coil pour

mass

1,2 are formed, low-voltage coil pour mass 2 has the lead of lifting one's head 6, lead 6 soldering coppers of lifting one's head lift one's head row 7, copper is lifted one's head Volleyball Association and is connect outside line, it is characterized in that described copper lifts one's head row 7 outsides and insulating sleeve 8 is installed, insulating sleeve 8 and the cast of low-voltage coil pour mass 2 one.This programme is lifted one's head row 7 outsides at copper insulating sleeve 8 is installed; and insulating sleeve 8 is to be cast in low-voltage coil pour mass 2 one; guaranteed that so not only copper lifts one's head the hermetically sealed insulation of arranging root; can also make copper lift one's head row better is fixed on the low-voltage coil pour mass (because the associativity of insulating sleeve and resin is very strong; pour into a mould than firm many of naked copper row cast so put behind the insulating sleeve again) with low-voltage coil; having solved the dry-type transformer low-pressure side lifts one's head the lead root (surrounding environment is moist at relatively poor environment easily; air humidity is higher) following problem of short-circuit; electric conductivity is protected; the state of insulation of dry-type transformer is stable; terminal protective earthing over the ground is stable, makes the operation of transformer more safe and reliable.Its described insulating sleeve 8 can be silica gel sheath or heat-shrink tube, and silica gel sheath is made by silica gel material, has good resilience, free rollover characteristics, is convenient to install, and the heat-shrink tube cladding can have good high-and low-temperature resistance, electrical insulating property on electric component.

Claims

1, dry-type transformer low-pressure side sealed insulation device, comprise high-tension coil pour mass (1), low-voltage coil pour mass (2), be installed in the inboard iron core (3) of low-voltage coil pour mass (2), and it is fixing high, low-voltage coil pour mass (1,2) upper clamping piece (4) and lower clamping piece (5) are formed, low-voltage coil pour mass (2) has the lead of lifting one's head (6), lead (6) soldering copper of lifting one's head is lifted one's head row (7), copper is lifted one's head Volleyball Association and is connect outside line, it is characterized in that described copper lifts one's head row (7) outside and insulating sleeve (8) is installed, insulating sleeve (8) and the cast of low-voltage coil pour mass (2) one.

2, dry-type transformer low-pressure side sealed insulation device as claimed in claim 1 is characterized in that described insulating sleeve (8) is silica gel sheath or heat-shrink tube.