CN209561166U

CN209561166U - A kind of threephase potential transformer

Info

Publication number: CN209561166U
Application number: CN201920307739.5U
Authority: CN
Inventors: 何排枝
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-11
Filing date: 2019-03-11
Publication date: 2019-10-29
Anticipated expiration: 2029-03-11

Abstract

The utility model discloses a kind of threephase potential transformers, metal shell including hermetically sealed welding, primary, the secondary connection end of welding on the shell, interior of shell is full of the transformer oil for realizing insulation and cooling, primary connection end includes multiple power connecting columns, power connecting column includes that the conductive metal stick connect in ceramic coat is worn in ceramic coat, the metal pedestal socket for being set in ceramic coat bottom and sealing, ceramic coat bottom outer wall and metal pedestal socket inner wall are equipped with multi-turn groove, and sticking sealing material is poured between ceramic coat bottom and metal pedestal socket；Concave-convex curved adhesive surface is formed by groove and sticky insulating materials, the problem of being close to sealing material with metal pedestal socket with ceramic coat closer, prevent oil leak at primary connection end；Secondary connection end include as sealing material together with pedestal made of the casting of metal ring seat and and pedestal on sealing wear the heavy mother of the conduction that connects, and fixed by metal ring seat with cage connection, make realization sealing at secondary connection end by the material characteristic of sealing material.

Description

A kind of threephase potential transformer

Technical field

The utility model relates to a kind of voltage transformers.

Background technique

In the prior art, threephase potential transformer includes oil immersed type insulation and dry insulation two kinds.Dry insulation voltage Mutual inductor is filled internal to realize insulation function, but epoxy resin the problems such as there are agings, cracking by epoxy resin, influences to insulate Effect, and epoxy resin has the even carcinogenic danger of pollution environment.And there are oil leaks for oil immersed type insulation voltage mutual inductor Problem, at terminals, Leakage is particularly acute, and the transformer oil of leakage is readily ignited so as to cause fire, is made Oil immersion type mutual-inductor is no longer widely used.

Summary of the invention

For overcome the deficiencies in the prior art, it is mutual to provide a kind of three-phase voltage with good leakage-proof structure for the utility model Sensor.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of threephase potential transformer, the metal shell including hermetically sealed welding weld primary connection end on the shell With secondary connection end, for the interior of shell full of insulation and cooling transformer oil is realized, the primary connection end includes multiple Power connecting column, the power connecting column include that ceramic coat, the metal pedestal socket for being set in ceramic coat bottom and sealing are worn and connect in ceramics Conductive metal stick in housing, the ceramic coat bottom outer wall and metal pedestal socket inner wall are equipped with multi-turn groove, and in ceramics Sticking sealing material is poured between jacket bottom and metal pedestal socket；The secondary connection end includes being connected by the sealing material With pedestal made of the casting of metal ring seat and and pedestal on sealing wear the heavy mother of the conduction that connects, and pass through the metal ring seat and shell It is connected and fixed.

Sealing is realized by the sealing material of casting viscosity between the ceramic coat and the metal bar.

The becket seat tool has internal ring wall, external annulus to be respectively protruding into the sealing material to form pedestal, the external annulus Upper ring is furnished with multiple through-holes, partially passes through the fixation that the through-hole realizes pedestal and metal ring seat after the sealing material solidification.

The metal pedestal socket and metal ring seat and shell weld.

The beneficial effects of the utility model are: the power connecting column bottom pouring toughness at the primary connection end of the utility model is exhausted Edge material, and formed with adhesive seal material by multiple grooves of ceramic coat bottom outer wall and metal pedestal socket inner wall concave-convex curved Bent adhesive surface, is close to sealing material with ceramic coat and metal pedestal socket closer, prevents oil leak at primary connection end The problem of；The pedestal at secondary connection end is then directly poured by sealing material, and heavy female sealing, which is worn, to be connect on pedestal, passes through sealing The material characteristic of material realizes sealing；By the above-mentioned Seal Design carried out for terminals, oil immersed type electricity is efficiently solved The Leakage for pressing mutual inductor interstar connection end further ensures oil immersed type voltage transformer using safe.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the fractionation schematic diagram of the utility model primary connection end power connecting column；

Fig. 3 is the cross-sectional view of the utility model primary connection end power connecting column；

Fig. 4 is the partial enlarged view of Fig. 3；

Fig. 5 is the cross-sectional view at the utility model primary connection end；

Fig. 6 is the structural schematic diagram of the utility model metal ring seat.

Specific embodiment

Referring to figs. 1 to a kind of threephase potential transformer of Fig. 6, the metal shell 1 including hermetically sealed welding is welded on shell Primary connection end 2 and secondary connection end 3 on 1, full of realizing insulation and cooling transformer oil, primary connection inside shell 1 End 2 include multiple power connecting columns 4, power connecting column 4 include ceramic coat 41, be set in 41 bottom of ceramic coat metal pedestal socket 42 and The metal bar 43 of 1 internal mutual inductor components of shell, 41 bottom outer wall of ceramic coat and metal are electrically connected across ceramic coat 41 42 inner wall of block set is equipped with multi-turn groove 44, and is poured sticking sealing material between 41 bottom of ceramic coat and metal pedestal socket 42 Material 5, and concave-convex curved adhesive surface is formed by groove and sticky insulating materials, make sealing material and ceramic coat and metallic sheath The problem of seat is close to closer, and oil leak at primary connection end is effectively prevented；Secondary connection end 3 includes being connected by sealing material 5 The heavy mother 33 of the conduction connect is worn in sealing on pedestal 32 made of being poured with metal ring seat 31 and pedestal 32, passes through the material of sealing material 5 Matter characteristic makes entire secondary connection end 3 realize sealing, prevents from the gap oil leak between heavy female 33 and pedestal 32；Pass through above-mentioned needle The Seal Design that docking line end is carried out, efficiently solves the Leakage of oil immersed type voltage transformer terminals, further protects Oil immersed type voltage transformer has been demonstrate,proved using safe.

Preferably, close to realize by being poured above-mentioned sealing material 5 between metal bar 43 and ceramic coat 41 Envelope connection, when installing power connecting column, first passes through sealing material 5 for metal bar 43 and 41 seal bond of ceramic coat, then will be ceramic Housing 41 is mounted on shell 1 while putting on metal pedestal socket 42 and being poured sealing material 5, and metal pedestal socket 42 and ceramic coat 41 are viscous It is welded after conjunction by metal pedestal socket 42 and shell 1, re-forms one layer of leakage-proof structure, to guarantee be more good sealing effect.

There is the metal ring seat 31 at secondary connection end 3 internal ring wall 34, external annulus 35 to be respectively protruding into the sealing to form pedestal 32 In material 5, slot position is formed between internal ring wall 34, external annulus 35, inside and outside ring wall can be close to after the solidification of sealing material 5, pass through slot Position forms tortuous adhesive surface, so that sealing material 5 and metal ring seat 31 is pasted more closely, further increases the effect of sealing Fruit, ring is furnished with multiple through-holes 36 on external annulus 35, and equally, sealing material 5 partially passes through the realization of through-hole 36 after solidifying make pedestal 32 It is more firm with metal ring seat 31；After 3 casting complete of secondary connection end, metal ring seat 31 and shell 1 are welded, completed secondary The installation of terminals 3.

By above-mentioned design, the probability of oil immersion type mutual-inductor oil leak can be greatly reduced, so that the requirement that is up to state standards, makes Oil immersion type mutual-inductor can be widely used again.

Claims

1. a kind of threephase potential transformer, the metal shell (1) including hermetically sealed welding are welded on once connecing on shell (1) Line end (2) and secondary connection end (3), the shell (1) is internal full of insulation and cooling transformer oil is realized, feature exists In: the primary connection end (2) includes multiple power connecting columns (4), and the power connecting column (4) includes ceramic coat (41), is set in pottery The conductive metal stick (43) connect in ceramic coat (41) is worn in the metal pedestal socket (42) of porcelain housing (41) bottom and sealing, described Ceramic coat (41) bottom outer wall and metal pedestal socket (42) inner wall are equipped with multi-turn groove (44), and in ceramic coat (41) bottom Sealing material (5) are cast between metal pedestal socket (42)；The secondary connection end (3) includes being connected by the sealing material (5) With pedestal (32) made of metal ring seat (31) casting and and pedestal (32) on sealing to wear the conduction that connects heavy female (33), and pass through institute Metal ring seat (31) is stated to be connected and fixed with shell (1).

2. threephase potential transformer according to claim 1, it is characterised in that: the ceramic coat (41) and the conduction Sealing is realized by the sealing material (5) of casting viscosity between metal bar (43).

3. threephase potential transformer according to claim 1, it is characterised in that: the metal ring seat (31) has internal ring wall (34), external annulus (35) is respectively protruding into the sealing material (5) to form pedestal (32), and ring is furnished with multiple on the external annulus (35) Through-hole (36) partially passes through the through-hole (36) after sealing material (5) solidification and realizes pedestal (32) and metal ring seat (31) Fixation.

4. threephase potential transformer according to claim 1, it is characterised in that: the metal pedestal socket (42) and metal ring seat (31) it is welded with shell (1).