CN2293111Y

CN2293111Y - Distribution transformer

Info

Publication number: CN2293111Y
Application number: CN 97240938
Authority: CN
Inventors: 金玮
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-16
Filing date: 1997-06-16
Publication date: 1998-09-30
Anticipated expiration: 2007-06-16
Also published as: IN190057B

Abstract

The utility model discloses a distribution transformer, which is composed of a high voltage connection terminal, a high voltage bushing, a low voltage connection terminal, a low voltage bushing, an iron core clamp, a pressure release valve, a high voltage winding and a low voltage winding. The utility model is characterized in that the iron core of the utility model comprises four silicon steel sheet rolling rings, the core section of the iron core is in a step shape or a rectangle shape, the window of the iron core is a rectangle, four corners the rectangle are provided with circular arcs, four annular iron cores are arranged in a cross shape, two iron cores are arranged at one shaft line of the cross shape, the other two iron cores are arranged along a direction which is perpendicular to the shaft line, a column an external connection graphic of which is circular or rectangular is arranged on the cross point of the cross, and the column is spliced by each side of the four annular iron cores. The utility model has the advantages of simple structure, short magnetic path, material saving, low cost, small zero load, small load loss, and obvious effect of energy saving.

Description

A kind of distribution transformer

The utility model relates to a kind of distribution transformer, the middle low capacity distribution transformer of particularly a kind of low-loss, material saving.

Middle small capacity transformer ubiquity loss height in using at present, inconvenient problem with use, big reason is relevant with the making of iron core, generally the mode of Cai Yonging has: a kind of is laminated core, but seam is many; Another kind is an E font punching closed assembly iron core, can only use non-oriented silicon steel sheet, this silicon steel sheet loss height; Another is that C sections core has two composition surfaces, thereby the no-load loss height of miniature transformer, and no-load current is big.As Shanghai transformer factory, the 5KVA-6.10KV single phase distribution transformer that Fuzhou Transformer Factory produces, no-load loss 50-60W.The 4th kind is that annular rolls silicon sheet core (it is 94219080.7 i.e. " a kind of low capacity single phase distribution transformers " that Wuhan special transformer factory produces its patent No., this technical scheme adopts the ring-like silicon sheet core that rolls, core section is trapezoidal, external figure is circle, and the ring-shaped silicon steel sheet iron core is that two ends are the rectangle of circular arc.The ring-shaped silicon steel sheet iron core is otch not, and coiling high-voltage coil and low-voltage coil on silicon sheet core, coil are the drum type brake winding, and low-voltage coil series connection, high-tension coil are in parallel for adjusting no-load loss, is wound with at the arc section of iron core and adjusts coil and connect with low-voltage coil.This first three kind of transformer core comparison has significant advantage, its cross section approximate circle shape iron core column, and coil is a drum type brake, can reduce coil resistance, realizes that no-load loss is little, the purpose of energy-saving and cost-reducing material.Consumptive material to occur when above bigger than normal but increase to 15KVA in transformer capacity, cost up, the problem that unloaded load loss can't reduce synchronously.

The novel purpose of this reality has provided a kind of distribution transformer, adopt the Fourth Ring to roll silicon sheet core, it is on the post of circle or square-section that coil winding is combined into an external figure on each one side of Fourth Ring iron core, and rational in infrastructure, consumptive material is economized, cost is low, easy to use.

For achieving the above object, the utility model adopts following scheme, it is by iron core, coil, shell, cap, high-voltage connection terminal, bushing, low-voltage wiring terminal, low-tension bushing, the iron core folder, parts such as pressure relief valve constitute, it is characterized in that iron core is that four annulars roll silicon steel sheet not otch or otch iron core composition, core section is stairstepping (sub-circular) or rectangle, core window is the rectangle of four jiaos of band circular arcs, four annular cores are cross and arrange, on a criss-cross axis, place two iron cores, and place two other iron core on the vertical direction with it, the post that it is circle or rectangle that each of arranging four annular cores at decussation point abandoned into an external figure on one side, and on post the coiling high pressure, low-voltage coil, high-voltage coil and low-voltage coil is the cartridge type winding, high-voltage coil and low-voltage coil can be to arrange successively, also can arranged crosswise, iron core column adopts strapping to fix, and impregnating resin, iron core folder shape and core configuration are corresponding cross shape, be installed on the iron core, with steel band packing tension, and by insulation board with iron core, high-voltage coil and low-voltage coil compresses together, and is fixing.

Fig. 1 is a kind of distribution transformer structural representation.

Fig. 2 is a kind of distribution transformer vertical view.

Fig. 3 is a kind of distribution transformer iron core, coil vertical view.

Fig. 4 is a kind of distribution transformer iron core, coil front view.

According to Fig. 1, Fig. 2, Fig. 3, Fig. 4 as can be known, iron core 1 links to each other with high-voltage coil and low-voltage coil 2, iron core is four and rolls silicon sheet core by the cross axis arranged and abandon into an iron core column, high-voltage coil and low-voltage coil 2 is wound on iron core 1 post, be divided into high pressure winding and low pressure winding, iron core 1 is changed with the height of high-voltage coil and low-voltage coil 2 combination realization voltages, iron core 1 cross section is stairstepping (sub-circular) or rectangle, iron core 1 window is the rectangle of four jiaos of band circular arcs, four annular cores 1 are cross and arrange, on a criss-cross axis, place two iron cores 1, and place two other iron core 1 on the vertical direction with it, the post that it is circle or rectangle that each of arranging four annular cores 1 at decussation point abandoned into an external figure on one side, each of iron core 1 is combined into coiling high pressure on the post on one side, low-voltage coil, high-voltage coil and low-voltage coil 2 is the cartridge type winding, high-voltage coil and low-voltage coil 2 can be to arrange successively, also can arranged crosswise, iron core column adopts strapping to fix, and impregnating resin, iron core folder 13 shapes and iron core 1 are shaped as corresponding cross shape, are installed on the iron core 1, with steel band packing tension, and by insulation board with iron core 1, high-voltage coil and low-voltage coil 2 compresses together, and is fixing.Members such as shell 4 carrying iron cores 1, high-voltage coil and low-voltage coil 2, iron core folder 13, and be the container of transformer oil hang and mix 3 and be welded on the shell 4, are used for the lifting of transformer, and pressure hook 5 is welded on shell 4, fixedly on cap 7, the sealing ring 6; Sealing ring 6 is that cap 7 cooperates with cap 7 with the seal member of shell 4, guarantees transformer sealing and loading and unloading; Presser feet 8 is connected with cap 7 usefulness bolts, and fixedly bushing 9; Bushing 9 is the insulated channel of coil high pressure winding outlet, high-voltage connection terminal 10 connecting coil high pressure lead-out wires and high pressure external connection; Low-tension bushing 12 is the insulated channel of coil low pressure winding outlet; Low-voltage wiring terminal 11 fixed coil low pressure winding lead-out wire and low pressure external connections; Iron core folder 13 fixing and protection iron cores 1; Earth stud 14 connects iron core ground wire and external ground wire, guarantees safety utilization of electric power; Pressure relief valve 15 is when transformer temperature rise release pressure when too high, the safe operation of protection transformer occurring.

The utility model compared with prior art has the following advantages, and relatively other structure iron core is at uniform window In the situation of size, the length of magnetic path shortens greatly, has reduced the silicon steel sheet usage quantity, because the stem stem cross section is rank The used copper cash of scalariform (sub-circular) is comparatively saved, thereby reaches reduction open circuit loss, saves material, makes With convenient, simple in structure, energy-saving effect is remarkable.

Claims

1, a kind of distribution transformer, it is by high-voltage connection terminal (10), bushing (9), low-voltage wiring terminal (11), low-tension bushing (12), iron core folder (13), pressure relief valve (15), high-voltage coil and low-voltage coil (2) constitutes, it is characterized in that iron core (1) is that four annulars roll silicon sheet core, iron core (1) cross section is stairstepping or rectangle, iron core (1) window is the rectangle of four jiaos of band circular arcs, four annular cores (1) are cross and arrange, on a criss-cross axis, place two iron cores (1), and place two other iron core (1) with it on the vertical direction, decussation point arrange four annular cores (1) Yi Bian the post that respectively to be combined into an external circle be circle or rectangle.

2, a kind of distribution transformer according to claim 1, it is characterized in that iron core (1) Yi Bian each be combined into coiling high pressure, low-voltage coil on the post, high-voltage coil and low-voltage coil (2) is the cartridge type winding, high-voltage coil and low-voltage coil (2) is arranged or arranged crosswise successively.

3, a kind of distribution transformer according to claim 1, it is characterized in that iron core folder (13) shape and iron core (1) are shaped as corresponding cross shape, be installed on the iron core (1), with steel band packing tension, and by insulation board iron core (1), high-voltage coil and low-voltage coil (2) are compressed, fixing.