CN110189893B

CN110189893B - Dry-type transformer

Info

Publication number: CN110189893B
Application number: CN201910519329.1A
Authority: CN
Inventors: 陈国光; 李旭生; 苏剑锋
Original assignee: Guangzhou Gaotie Metrology And Test Co ltd
Current assignee: Guangzhou Gaotie Metrology And Test Co ltd
Priority date: 2019-06-15
Filing date: 2019-06-15
Publication date: 2021-07-16
Anticipated expiration: 2039-06-15
Also published as: CN110189893A

Abstract

The invention discloses a dry-type transformer, which comprises a transformer body, a housing, a bottom plate and a fan, wherein the transformer body is formed by a plurality of groups of encapsulated windings in an array manner, a supporting rod is arranged at the bottom of the transformer body and connects each group of encapsulated windings, the supporting rods are arranged in a cross manner, and a first threaded hole penetrates through each supporting rod; the transformer body is integrally arranged in a cavity of the housing, the bottom of the transformer body is fixedly positioned with the bottom plate, and meanwhile, the transformer body is arranged in the housing through the fan. Whole device realizes dispelling the heat to the transformer body, and the graphite material of housing side is protruding simultaneously, is diffused fast with the heat that the housing was shed, and array distribution's arch also can reduce in the air great dust and enter into the housing inner wall through the air vent.

Description

Dry-type transformer

Technical Field

The invention belongs to the technical field of transformer equipment, and particularly relates to a dry-type transformer.

Background

The dry type transformer mainly comprises an iron core formed by silicon steel sheets and coils poured by epoxy resin, an insulating cylinder is arranged between the high-voltage coils and the low-voltage coils to increase electrical insulation, the coils are supported and restrained by cushion blocks, and fasteners lapped by parts of the coils all have anti-loosening performance. The LED light source is widely applied to places such as local illumination, high-rise buildings, airports, wharf CNC mechanical equipment and the like. At present, urban and rural power grid construction steps are accelerated, and the generated energy and the power consumption of China are increased day by day. Generally speaking, for every 1kW of power generation, the total capacity of the transformer needs to be increased by 11 kVA. It is estimated that dry distribution transformers account for approximately 1/5-1/4 of all distribution transformers. The transformer industry has high popularity due to the construction investment of a power grid, and the output can be kept at about 20% acceleration after 2010.

The dry type transformer has the advantages of strong short circuit resistance, small maintenance workload, high operation efficiency, small volume, low noise and the like, and is commonly used in places with high performance requirements on fire prevention, explosion prevention and the like. Meanwhile, the whole structure of the dry-type transformer is precise, so that strict control requirements are met on the temperature during use, and the dry-type transformer is frequently in failure and stops working due to overhigh temperature in the current use process.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a dry-type transformer, which solves the technical problem that the dry-type transformer has faults due to overhigh temperature when in work.

The purpose of the invention can be realized by the following technical scheme:

a dry-type transformer comprises a transformer body, a housing, a bottom plate and a fan, wherein the transformer body is formed by a plurality of groups of encapsulated windings in an array mode, a supporting rod is arranged at the bottom of the transformer body and connects the encapsulated windings in each group, the supporting rods are arranged in a cross mode, and a first threaded hole penetrates through each supporting rod;

the bottom of the housing is of an open cavity structure, convex edges protruding outwards are symmetrically arranged on the outer walls of two sides of the housing, the convex edges are distributed along the outer walls of the two sides of the housing in an array manner, vent holes are distributed on the outer walls of the convex edges and the two sides of the housing, the vent holes in the outer wall of the housing are communicated with an internal cavity, and limiting grooves are symmetrically arranged on the two sides of the bottom of the housing along the array direction of the convex edges;

the surface of bottom plate runs through and is provided with the second screw hole to be provided with the card strip of mutual symmetry in the both sides of bottom plate, the card strip with the spacing groove block is fixed, just the bottom plate wholly covers completely the bottom of housing:

a first threaded hole in the supporting rod at the bottom of the transformer body is fastened with a second threaded hole in the surface of the bottom plate through a bolt, and the transformer body is integrally arranged in a cavity of the housing;

the fan is arranged at the top of the cavity structure of the housing.

Furthermore, locking bolts are uniformly distributed on the upper surface where the limiting groove is located, the locking bolts simultaneously penetrate through the bottom of the housing and the second threaded holes in the surface of the bottom plate, and the locking bolts are of bolt-shaped structures with the diameters of the two end portions larger than the diameter of the middle portion.

Furthermore, the protrusions are made of graphite materials and are integrally formed with the outer walls of the two sides of the housing.

Further, the fan comprises a fan cover and a fan blade arranged at the bottom of the outer shell, the whole fan cover is of a circular structure, the middle of the fan cover is a cavity, and the outer wall where the fan cover is located is of a hollow structure.

Furthermore, a power supply connecting wire is arranged at the top of the fan and penetrates through the top of the housing.

Furthermore, the fan cover where the fan is located is fixedly connected to the top of the cavity structure of the housing.

The invention has the beneficial effects that:

1. this device passes through the setting of fan in the housing, can realize dispelling the heat to the transformer body, and the graphite material of housing side is protruding simultaneously, and the heat of loosing the housing is diffused fast, and the arch of array distribution also can reduce in the air great dust and enter into the housing inner wall through the air vent.

2. This device is through covering over the transformer body completely in the cavity that is enclosed by housing, bottom plate, realizes whole protection, and the second bolt hole on the bottom plate has improved the fastness of being connected with the transformer body.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic side view of an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a transformer body according to an embodiment of the present invention;

FIG. 4 is a schematic view of the internal structure of the housing of the embodiment of the present invention;

FIG. 5 is a schematic structural elevation cross-section of an embodiment of the present invention;

FIG. 6 is a schematic view of a backplane structure according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a fan according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, 2, and 3, an embodiment of the present invention provides a dry-type transformer, which includes a transformer body 1, a housing 2, a bottom plate 3, and a fan 4, where the transformer body 1 generally selects 3 groups of arrays from a plurality of groups of encapsulated windings, and a supporting rod 11 is disposed at the bottom of the transformer body 1, the supporting rod 11 connects the encapsulated windings of each group to each other, and the supporting rod 11 is disposed in a cross manner, so that the supporting rod 11 is entirely enough to support the transformer body 1, and a first threaded hole 101 is formed through the supporting rod 11.

As shown in fig. 4 and 5, the bottom of the housing 2 is an open cavity structure, and the two side outer walls of the housing 2 are symmetrically provided with protruding edges 21 protruding outwards, the protrusions 21 are made of graphite, and are distributed along the two side outer walls of the housing 2 in an array manner, the protruding edges 21 and the outer walls of the two sides of the housing 2 are provided with vent holes 201, the vent holes 201 on the outer wall of the housing 2 are communicated with the cavity inside, and the two sides of the bottom of the housing 2 are symmetrically provided with limiting grooves 22 along the protruding array direction of the protruding edges 21.

As shown in fig. 6, the second threaded hole 301 is formed in the surface of the bottom plate 3 in a penetrating manner, the clamping strips 31 are symmetrically arranged on two sides of the bottom plate, the clamping strips 31 are fixedly clamped with the limiting grooves 22, the bottom plate 3 completely covers the bottom of the housing 2, and meanwhile the second threaded hole 301 can achieve ventilation and heat dissipation effects.

First screw hole 101 on the branch 11 of transformer body 1 bottom passes through the bolt-up with the second screw hole 301 on bottom plate 3 surface, and second screw hole 301 sets up for the equipartition, according to the position needs, suitably adjusts the hookup location relation between first screw hole 101 and the second screw hole 301, and transformer body 1 wholly prevents that bottom plate 3 from taking place to rock in arranging the cavity of housing 2 in, during the fixed.

The upper surface on which the limiting groove 22 is located is uniformly distributed with locking bolts 221, the locking bolts 221 simultaneously penetrate through the bottom of the housing 2 and the second threaded holes 301 in the surface of the bottom plate 3, the locking bolts 221 are bolt-shaped structures with two end diameters larger than the middle diameter, and the fixed connection between the bottom plate 3 and the housing 2 can be effectively realized.

As shown in fig. 7, the fan 4 includes a fan housing 41 and a fan blade 42 disposed at the bottom of the outer casing 41, the fan housing 41 is integrally circular and has a hollow middle portion, the outer wall of the fan housing 41 is hollow, and the fan housing 41 is fixedly connected to the top of the cavity structure of the housing 2. The top of the fan 4 provides power supply work through a power connection wire, and the power connection wire penetrates through the top of the housing 2 and is communicated with an external power supply.

During the use, the fan 4 can effectively realize the circulation of air in the cavity of housing 2, avoids the damage that local high temperature caused transformer body 1. Simultaneously can effectively dispel the heat through the mutual intercommunication of air vent 201 on the outer wall of housing 2 and inside cavity, and the arch 21 of array distribution can realize effectively absorbing the steam of air vent 201 effluvium on the outer wall of housing 2, can reach rapid cooling's purpose again, comparatively densely distributed between the arch 21 in addition, and also be provided with air vent 201 on the adjacent arch 21 and can attach outside dust, avoid entering into inside through the outer wall of housing 2, cause the damage to transformer body 1.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to 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 foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims

1. A dry-type transformer comprises a transformer body (1), a housing (2), a bottom plate (3) and a fan (4), and is characterized in that the transformer body (1) is formed by a plurality of groups of encapsulated windings in an array mode, a supporting rod (11) is arranged at the bottom of the transformer body (1), each group of encapsulated windings are connected with one another through the supporting rod (11), the supporting rods (11) are arranged in a cross mode, and a first threaded hole (101) penetrates through the supporting rod (11);

the bottom of the housing (2) is of an open cavity structure, convex edges (21) protruding outwards are symmetrically arranged on the outer walls of two sides of the housing (2), the convex edges (21) are distributed along the outer walls of two sides of the housing (2) in an array manner, vent holes (201) are distributed on the outer walls of the convex edges (21) and two sides of the housing (2), the vent holes (201) in the outer wall of the housing (2) are communicated with the cavity inside, and limiting grooves (22) are symmetrically arranged on two sides of the bottom of the housing (2) along the array direction of the convex edges (21);

a second threaded hole (301) is formed in the surface of the bottom plate (3) in a penetrating mode, clamping strips (31) which are symmetrical to each other are arranged on the two sides of the bottom plate, the clamping strips (31) are fixedly clamped with the limiting grooves (22), and the bottom of the housing (2) is completely covered by the bottom plate (3) as a whole;

a first threaded hole (101) in a supporting rod (11) at the bottom of the transformer body (1) is fastened with a second threaded hole (301) in the surface of the bottom plate (3) through a bolt, and the transformer body (1) is integrally arranged in a cavity of the housing (2);

the fan (4) is arranged at the top of the cavity structure of the housing (2);

locking bolts (221) are uniformly distributed on the upper surface where the limiting groove (22) is located, the locking bolts (221) simultaneously penetrate through the bottom of the housing (2) and the second threaded holes (301) in the surface of the bottom plate (3), and the locking bolts (221) are of bolt-shaped structures with the diameters of two end portions larger than the diameter of the middle portion;

the fan (4) comprises a fan cover (41) and a fan blade (42) arranged at the bottom of the outer shell, the whole fan cover (41) is of a circular structure, the middle of the fan cover is a cavity, and the outer wall where the fan cover (41) is arranged is of a hollow structure.

2. Dry transformer according to claim 1, whereas the ledge (21) is of graphite material and is formed integrally with the outer wall of the housing (2) on both sides.

3. Dry transformer according to claim 1 whereas the top of the fan (4) is provided with power connection wires and the power connection wires run through the top of the enclosure (2).

4. Dry transformer according to claim 1, whereas the wind shield (41) where the fan (4) is located is fixedly connected to the top of the cavity structure of the enclosure (2).