CN211628870U

CN211628870U - Dry-type 10kV and 20kV general energy-saving distribution transformer

Info

Publication number: CN211628870U
Application number: CN201921887460.5U
Authority: CN
Inventors: 朱铭; 刘忠明
Original assignee: Jiangsu Liyang Electric Manufacturing Co ltd
Current assignee: Jiangsu Liyang Electric Manufacturing Co ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-10-02
Anticipated expiration: 2029-11-05

Abstract

The utility model discloses a general energy-saving distribution transformer of dry-type 10kV and 20kV, the upper portion and the lower part of silicon steel sheet outer lane are provided with the folder of longitudinal symmetry arrangement, 8 line cakes are arranged from top to bottom in proper order to the outer coil between folder of upper portion and lower part, the upper 4 line cakes are merged into the elementary upper coil, the lower 4 line cakes are merged into the elementary lower coil, each pair of elementary upper coil and elementary lower coil are all longitudinal symmetry arrangement, and rely on epoxy to pour into a whole with the upper and lower coil; a secondary copper bar is arranged between the clamping piece at the upper part and the lower part and each primary upper coil; the top parts of the two clamping pieces which are symmetrically arranged front and back at the upper and lower parts are respectively provided with a support cushion block which is symmetrical left and right. The utility model discloses have low no-load loss, low no-load current, primary coil can input the voltage of two kinds of differences, has practiced thrift the cost, has reduced transformer self's loss, has improved economic nature and practicality.

Description

Dry-type 10kV and 20kV general energy-saving distribution transformer

Technical Field

The utility model relates to a three-phase dry-type distribution transformer technical field especially relates to a general energy-saving distribution transformer of dry-type 10kV and 20 kV.

Background

With the improvement of society and the improvement of power supply requirements and environmental requirements, the voltage of a power transmission line is developed towards the direction of diversity, and the traditional distribution transformer is changed from 10kV to 0.4kV, and from 20kV to 0.4 kV. For a power grid with 20kV voltage level planned to be built, the voltage level of the currently operated power grid is 10kV, firstly, a newly-installed distribution transformer is required to simultaneously meet the operation requirements of 10kV and 20 kV; secondly, if the original 10kV distribution transformer is bought and installed with a 20 kV-level distribution transformer again, the cost of enterprises is increased, especially for places with strict requirements on fire prevention and pollution in hospitals, airports, offices and the like, the oil-immersed distribution transformer cannot meet the requirements, how to meet different voltage levels of transmission lines of the distribution transformer and how to improve the economy and the practicability becomes a priority. Therefore, a dry-type 10kV and 20kV universal energy-saving distribution transformer is provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a general energy-saving distribution transformer of dry-type 10kV and 20kV, the utility model discloses rational in infrastructure has low no-load loss, low no-load current, and primary coil can input the voltage of two kinds of differences, has practiced thrift advantages such as cost.

In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a realize through following technical scheme:

the utility model provides a general energy-saving distribution transformer of dry-type 10kV and 20kV, includes connecting screw and silicon steel sheet, the upper portion and the lower part of silicon steel sheet outer lane are provided with the folder of longitudinal symmetry arrangement, just the front end and the rear end of silicon steel sheet outer lane are provided with the folder of longitudinal symmetry arrangement, upper portion and lower part outer lane from the top down between the folder has set gradually elementary upper coil, elementary lower coil, and the elementary upper coil passes through epoxy resin and pours together and install on three montants of horizontal "day" style of calligraphy structure with elementary lower coil, and every pair of elementary upper coil and elementary lower coil all longitudinal symmetry arrange, all is provided with secondary copper bar between folder on upper portion and every elementary upper coil, and two folder longitudinal symmetry arrangement all are provided with bilateral symmetry's cushion about the upper and lower, and support the fastening through bolt and folder.

Preferably, in the above dry-type 10kV and 20kV general energy-saving distribution transformer, the upper primary coil and the lower primary coil share 10kV respectively; the connecting screw rod can be switched between a series state and a parallel state, when the line voltage is 10kV, the upper coil and the lower coil are connected into the parallel state, and at the moment, the primary voltage is 10kV, and the secondary voltage is 0.4 kV; when the line voltage is 20kV, the upper coil and the lower coil are connected in series, wherein the primary voltage is 20kV, and the secondary voltage is 0.4 kV.

Preferably, in the above dry-type 10kV and 20kV general energy-saving distribution transformer, three secondary copper bars are arranged along the length direction of the upper clamp.

Preferably, in the above dry-type 10kV and 20kV general energy-saving distribution transformer, each primary upper coil is disposed by epoxy resin casting.

Preferably, in the dry-type 10kV and 20kV general energy-saving distribution transformer, the silicon steel sheets are high-permeability silicon steel sheets, and the silicon steel sheets are in a horizontal structure shaped like a Chinese character ri.

The utility model has the advantages that: the utility model discloses rational in infrastructure, have low no-load loss, low no-load current, primary coil can input the voltage of two kinds of differences, has both practiced thrift the cost, has reduced transformer self's loss again, has improved economic nature and practicality, especially has good economy and social popularizing and applying in the place that requires very high to the environment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a front-back contrast structure of the present invention.

Fig. 2 is a 10kV parallel connection diagram of the present invention.

Fig. 3 is the utility model discloses a 20kV series connection wiring diagram.

In the figure: 1. connecting a screw rod; 2. silicon steel sheets; 3. a primary upper coil; 4. a primary lower coil; 5. a clamp; 6. a secondary copper bar; 501. and a cushion block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the embodiment is a dry-type 10kV and 20kV general energy-saving distribution transformer, which includes a silicon steel sheet 2, the silicon steel sheet 2 is in a horizontal "ri" -shaped structure, upper and lower parts of an outer ring of the silicon steel sheet 2 are provided with clamping pieces 5 which are symmetrically arranged up and down, front and rear ends of the outer ring of the silicon steel sheet 2 are provided with the clamping pieces 5 which are symmetrically arranged back and forth, 8 coil cakes are sequentially arranged on the outer ring between the upper and lower clamping pieces 5 from top to bottom, an upper 4 coil cakes are combined into a primary upper coil 3, and a lower 4 coil cakes are combined into a primary lower coil 4, the primary upper coil 3 and the primary lower coil 4 are cast together through epoxy resin and installed on three vertical rods of the horizontal "ri" -shaped structure, and each pair of the primary upper coil 3 and the primary lower coil 4 are symmetrically arranged up and down; a secondary copper bar 6 is arranged between the clamping piece 5 at the upper part and each primary upper coil 3, and the three secondary copper bars 6 are arranged along the length direction of the upper clamping piece 5; the left and right symmetrical cushion blocks 501 are arranged between the two clamping pieces 5 and the coil, the upper part and the lower part of the clamping pieces are symmetrically arranged front and back, and the cushion blocks 501 are connected with the clamping pieces 5 through bolts to play a role in supporting and fastening; the primary upper coil 3 and the primary lower coil 4 share 10kV respectively; the screw rods which are generally poured on the outer coils can be switched between a series connection state and a parallel connection state, when the line voltage is 10kV, the screw rods are connected into the parallel connection state, the primary voltage is 10kV, and the secondary voltage is 0.4 kV; when the line voltage is 20kV, the screws are connected in series, and the primary voltage is 20kV and the secondary voltage is 0.4kV at the moment.

As shown in fig. 2, when the line is connected in parallel at 10kV, the a end of the primary upper coil 3 is connected with the a1 end and the X1 end of the primary lower coil 4, respectively; the end B of the primary upper coil 3 is respectively connected with the end B1 and the end X1 of the primary lower coil 4; the C end of the primary upper coil 3 is respectively connected with the C1 end and the Y1 end of the primary lower coil 4; the X end of the primary upper coil 3 is connected with the X1 end of the primary lower coil 4; the Y end of the primary upper coil 3 is connected with the Y1 end of the primary lower coil 4; the Z terminal of the primary upper coil 3 is connected to the Z1 terminal of the primary lower coil 4.

As shown in fig. 3, when the 20kV serial connection is performed, the a end of the primary upper coil 3 is connected with the Z1 end of the primary lower coil 4; the terminal B of the primary upper coil 3 is connected with the terminal X1 of the primary lower coil 4; the terminal C of the primary upper coil 3 is connected with the terminal Y1 of the primary lower coil 4; the X end of the primary upper coil 3 is connected with the A1 end of the primary lower coil 4; the Y end of the primary upper coil 3 is connected with the B1 end of the primary lower coil 4; the Z terminal of the primary upper coil 3 is connected to the C1 terminal of the primary lower coil 4.

The utility model has the advantages that the structure design is reasonable, when in use, the silicon steel sheet 2 of the utility model adopts Japanese 23ZDKH90 high magnetic-conductive silicon steel sheet, the no-load loss is reduced, the no-load current is also reduced, under the premise of the same heat dissipation surface, the temperature rise is reduced, the insulation aging speed is slowed down, and the service life of the transformer is prolonged; the iron core structure adopts three-phase three-column and long-circular shape, although the section of the iron core is increased, the height is reduced, and the volume of the transformer is reduced; the low voltage is wound by adopting the copper foil, compared with a copper wire, the low voltage winding does not need transposition, the size of a low voltage coil is reduced, the structure is compact, and the short circuit resistance of the transformer is enhanced; the high pressure is a multi-layer cylindrical structure, the connection mode is angular connection, the process is simple, the operation is convenient, and the method is suitable for small distribution transformers; the primary coil adopts an epoxy resin pouring process, and is a firm whole after being dried, so that the mechanical strength of the transformer is improved, and the coil is not easy to damage in sudden short circuit; the transformer body fastening piece is processed strictly according to the national standard, and cannot be bent and deformed when the transformer body is tightened; the lead wires are clear and attractive in manufacturing trend, and enough electrical distance is guaranteed.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a general energy-saving distribution transformer of dry-type 10kV and 20kV, includes connecting screw (1) and silicon steel sheet (2), its characterized in that: the upper part and the lower part of the outer ring of the silicon steel sheet (2) are provided with clamping pieces (5) which are symmetrically arranged up and down, the front end and the rear end of the outer ring of the silicon steel sheet (2) are provided with clamping pieces (5) which are symmetrically arranged front and back, the outer ring between the clamping pieces (5) on the upper portion and the lower portion is sequentially provided with a primary upper coil (3) and a primary lower coil (4) from top to bottom, the primary upper coil (3) and the primary lower coil (4) are poured together through epoxy resin and are installed on three vertical rods of a horizontal Y-shaped structure, each pair of primary upper coil (3) and primary lower coil (4) are symmetrically arranged up and down, a secondary copper bar (6) is arranged between each clamping piece (5) on the upper portion and each primary upper coil (3), two clamping pieces (5) which are symmetrically arranged front and back on the upper portion are respectively provided with a cushion block (501) which are symmetrically arranged left and right, and the cushion blocks (501) are supported and fastened with the clamping.

2. A dry 10kV and 20kV universal energy-saving distribution transformer according to claim 1, characterized in that: the primary upper coil (3) and the primary lower coil (4) share 10kV respectively; the connecting screw rod (1) can be switched between a series connection state and a parallel connection state, when the line voltage is 10kV, the upper coil and the lower coil are connected into a parallel connection state, the primary voltage is 10kV, and the secondary voltage is 0.4 kV; when the line voltage is 20kV, the upper coil and the lower coil are connected in series, wherein the primary voltage is 20kV, and the secondary voltage is 0.4 kV.

3. A dry 10kV and 20kV universal energy-saving distribution transformer according to claim 1, characterized in that: the three secondary copper bars (6) are arranged along the length direction of the upper clamping piece (5).

4. A dry 10kV and 20kV universal energy-saving distribution transformer according to claim 1, characterized in that: each primary upper coil (3) is cast by epoxy resin.

5. A dry 10kV and 20kV universal energy-saving distribution transformer according to claim 1, characterized in that: the silicon steel sheets (2) are high-permeability silicon steel sheets, and the silicon steel sheets (2) are in a transverse reversed Y-shaped structure.