CN212907337U

CN212907337U - Dry-type transformer

Info

Publication number: CN212907337U
Application number: CN202022058293.2U
Authority: CN
Inventors: 包存海
Original assignee: Beierbian Group Co ltd
Current assignee: Beierbian Group Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-04-06
Anticipated expiration: 2030-09-18

Abstract

The utility model discloses a dry-type transformer, including box and a plurality of transformer winding of setting in the box, the winding cover is on the iron core, and the upper and lower both ends of iron core carry out the centre gripping through upper clamp and lower clamp respectively and fix, and carry out fixed support to the winding through the cushion, lower clamp sets up on the bottom half through the support frame of fixing with it, lower clamp is square pipe, and be provided with the intercommunication pipeline between the lower clamp, the mouth of blowing has been seted up on lower clamp and the intercommunication pipeline that correspond with the winding, the both ends opening of its two lower clamps communicates with one end of air pipe, the other end of air pipe communicates with the fan, realize through the fan that the air enters lower clamp and intercommunication pipeline along air pipe, discharge from the mouth of blowing corresponding with the winding finally, carry out forced air cooling to the winding; and a cooling device is added to carry out heat exchange on air, take away heat flowing through the air, reduce the temperature of the air entering the lower clamping piece and improve the cooling effect.

Description

Dry-type transformer

Technical Field

The utility model relates to a power supply and transformation field especially relates to a dry-type transformer.

Background

The dry type transformer carries out convection conduction heat dissipation by relying on the surface of the winding and the iron core and air of the surrounding environment, so as to meet the requirement of long-term safe operation, and the convection heat dissipation capacity of the air is mainly related to the flow speed of the air. Therefore, in order to enhance the heat dissipation effect of the dry-type transformer, a measure of additionally installing a fan is generally adopted to accelerate the flow velocity of the air flow around the transformer and enhance the convection heat dissipation effect, so as to reduce the temperature of the transformer.

The existing cooling fan for the dry-type transformer uses a cross-flow cooling fan which is arranged at the lower part of the dry-type transformer, because the model specification of the cross-flow cooling fan is fixed, two or three fans are generally arranged at one side of the dry-type transformer, in order to facilitate installation, a large gap is generally reserved between the two fans, and partial fans at the upper part of the gap can not blow, so that the cooling effect of the dry-type transformer is influenced.

Meanwhile, the existing dry-type transformer is generally equipped with a box body, the dry-type transformer and the cross-flow type cooling fan are arranged in the box body, and dust and other impurities are prevented from falling on the dry-type transformer or being sucked into the cross-flow type cooling fan.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the existing similar products have poor structural design and poor safety.

In view of this, according to the utility model discloses an aim of the utility model, the utility model provides a dry-type transformer, be in including box and setting a plurality of transformer winding in the box, the winding cover is on the iron core, and the upper and lower both ends of iron core carry out the centre gripping respectively through two last folder and two lower folders and fix, and it is right through the cushion the winding carries out the fixed stay, two the folder sets up on the base of bottom half through the support frame fixed with it down, characterized by: the two lower clamping pieces are square tubes, at least two communicating pipelines are arranged between the two lower clamping pieces, blowing openings are formed in the lower clamping pieces and the communicating pipelines corresponding to the windings, openings in two ends of the two lower clamping pieces are communicated with one end of a ventilating pipeline, the other end of the ventilating pipeline is communicated with a fan, air enters the lower clamping pieces and the communicating pipelines along the ventilating pipeline through the fan, is finally discharged from the blowing openings corresponding to the windings, and is subjected to forced air cooling;

the box body is of a rectangular structure, a shutter is arranged at the top of the side face of the box body, and a rectangular hole communicated with the air inlet of the fan is formed in the bottom of the side face of the box body;

the fan is fixed bottom half, its air outlet pass through the heat sink with air pipe intercommunication.

Furthermore, the two fans are respectively arranged on the two opening sides of the two ends of the lower clamping pieces and are communicated with the openings on the same side of the two lower clamping pieces through a tee joint.

Further, the heat sink sets up between tee bend and the fan, the heat sink includes the rectangle casing and sets up at its inside cooling pipe, and the import and the export of cooling pipe all run through rectangle casing and box to form the circulation through circulating line and outside cooling water source.

Further, rectangle casing bottom is provided with leaks hopper-shaped and stores the chamber, and stores the chamber bottom and set up the outlet with drainage pipe intercommunication, and drainage pipe runs through the box.

Furthermore, the air blowing openings in the lower clamp and the communication pipeline form an intermittent rectangle or an intermittent circle, and the air blowing openings correspond to the bottom of the winding.

Furthermore, a filter screen is arranged at the position of the rectangular hole, and the filter screen is arranged in the two parallel sliding grooves in a sliding mode through the support.

Compared with the prior art, the beneficial effects of the utility model are that: dry-type transformer

The utility model provides a dry-type transformer, after installing according to current dry-type transformer mounting method, install the fan in the box, and realize the connection between fan, water cooling plant (heat sink) and the lower clamp through air pipe, and through circulating line intercommunication water cooling plant and external cooling water source, the drainage pipe stretches out outside the box, places the filter screen in rectangular hole department;

when the dry type transformer is used for power supply and transformation operation, the fan works, air outside the box body enters the fan for pressurization after being filtered by the filter screen, the pressurized air is subjected to heat exchange with cooling water in an internal water cooling pipeline (cooling pipeline) through the water cooling device, enters the lower clamp body and the communicating pipeline which are communicated with each other through the ventilating pipeline, is finally discharged from the blowing port corresponding to the winding, flows from the outside of the winding, flows from a gap between the winding (a gap is formed between the high-voltage winding and the low-voltage winding), exchanges heat with the winding, is mixed with air in the box body after taking away heat of the winding, and is finally discharged out of the box body through the louver arranged at the top of the side face of the box body.

The external cooling water source forms circulation with a water cooling pipeline (cooling pipeline) through a circulation pipeline, cooling water flowing through the water cooling pipeline exchanges heat with air, the heat of the flowing air is taken away, the temperature of the air entering the lower clamping piece is reduced, and the cooling effect is improved; the air is condensed on the water cooling pipeline after heat exchange through the water cooling pipeline and is gathered in the funnel-shaped storage cavity after falling behind, and due to the action of air pressure, water in the funnel-shaped storage cavity is quickly discharged to the outside of the box body under the pushing of the pressure, so that the humidity of the air entering the lower clamp body is reduced, and the influence of overlarge humidity on the work of the transformer is prevented; the fan directly blows air outside the box body into the lower clamping piece and then the air is discharged into the box body, so that the winding is cooled, meanwhile, forced circulation of the air in the box body outside is realized, and the cooling effect is improved; the channel formed by the lower clamp body is utilized, and the communicating pipeline is arranged between the lower clamp bodies, so that the lower clamp bodies and the communicating pipeline form a communicated whole, and the clamping and supporting strength of the iron core and the winding is improved; the mouth of blowing that sets up on lower clamp and the intercommunication pipeline forms discontinuous rectangle or discontinuous circular, and all correspond with the winding bottom, because the effect of cushion, the mouth interval of blowing sets up, when guaranteeing to support intensity, make from the mouth exhaust wind of blowing directly get into the winding clearance, compare with prior art and increased the area of blowing to the winding (current only blow to the winding in the clamp outside down, the mouth of blowing on the clamp is blown to the winding in the clamp outside down in this application, the mouth of blowing on the intercommunication pipeline is blown to the winding between the clamp down), the cooling rate has been improved.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a dry-type transformer.

Fig. 2 is a sectional view of a dry type transformer.

Fig. 3 is a schematic structural view of the lower clip and the communication pipe.

Fig. 4 is a schematic diagram of the structure of fig. 3 with windings placed thereon.

Fig. 5 is a schematic structural diagram of the cooling device.

FIG. 6 is a cross-sectional view of a temperature reduction device.

Fig. 7 is a schematic structural view of the filter screen.

Reference numerals:

1-a box body, 2-a winding, 3-an iron core, 4-an upper clamp, 5-a lower clamp, 6-a cushion block, 7-a support frame, 8-a communication pipeline, 9-an air blowing port, 10-a ventilation pipeline, 11-a fan, 12-a shutter, 13-a rectangular hole, 14-a cooling device, 15-a filter screen, 16-a chute and 17-a support; 14 a-rectangular shell, 14 b-cooling pipeline, 14 c-circulating pipeline, 14 e-storage cavity, 14 f-drainage pipeline and 14 g-drainage outlet.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A dry-type transformer according to some embodiments of the present invention is described below with reference to fig. 1 to 7.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the utility model provides a dry-type transformer, which comprises a box body 1 and a plurality of transformer windings 2 arranged in the box body 1, wherein the windings 2 are sleeved on an iron core 3, the upper and lower ends of the iron core 3 are respectively clamped and fixed by two upper clamping pieces 4 and two lower clamping pieces 5, the windings 2 are fixedly supported by a cushion block 6, and the two lower clamping pieces 5 are arranged on a base at the bottom of the box body 1 by a support frame 7 fixed with the two lower clamping pieces 5;

the two lower clamping pieces 5 are square tubes, at least two communication pipelines 8 are arranged between the two lower clamping pieces 5, air blowing ports 9 are formed in the lower clamping pieces 5 corresponding to the windings 2 and the communication pipelines 8, openings at two ends of the two lower clamping pieces 5 are communicated with one end of a ventilation pipeline 10, the other end of the ventilation pipeline 10 is communicated with a fan 11, air enters the lower clamping pieces 5 and the communication pipelines 8 along the ventilation pipeline 10 through the fan 11, is finally discharged from the air blowing ports 9 corresponding to the windings 2, and is used for carrying out forced air cooling on the windings 2;

the box body 1 is of a rectangular structure, the top of the side surface of the box body 1 is provided with a shutter 12, and the bottom of the side surface of the box body 1 is provided with a rectangular hole 13 communicated with an air inlet of the fan 11;

the fan 11 is fixed at the bottom of the box body 1, and the air outlet of the fan is communicated with the ventilation pipeline 10 through the cooling device 14.

The utility model provides a dry-type transformer, when the user uses this dry-type transformer to carry out power supply and transformation operation;

after the dry-type transformer is installed according to the existing installation method of the dry-type transformer, the fan 11 is installed in the box body 1, and the connection among the fan 11, the water cooling device (the cooling device 14) and the lower clamp body 5 is realized through the ventilation pipeline 10;

when the dry type transformer is used for power supply and transformation operation, the fan 11 works, air outside the box body 1 enters the fan 11 through the rectangular hole 13 to be pressurized, the pressurized air enters the lower clamp body 5 and the communicating pipeline 8 which are communicated with each other through the ventilating pipeline 10 after passing through the water cooling device to exchange heat with cooling water inside the water cooling device, and is finally discharged from the air blowing port 9 corresponding to the winding 2, one part of the pressurized air flows from the outside of the winding 2, the other part of the pressurized air flows through a gap between the winding 2 (a gap is formed between the high-voltage winding and the low-voltage winding) and exchanges heat with the winding 2, the heat of the winding 2 is taken away and then is mixed with the air inside the box body 1, and finally, the air is discharged outside the box body 1 through.

The cooling device 14 exchanges heat with air flowing through, the heat of the air flowing through is taken away, the temperature of the air entering the lower clamp 5 is reduced, the cooling effect is improved, meanwhile, water vapor in the air is condensed at the cooling device 14, the humidity of the air entering the lower clamp 5 is reduced, and the influence of overlarge humidity on the work of the transformer is prevented; the fan 11 directly blows air outside the box body 1 into the lower clamping piece 5 and then discharges the air into the box body 1, so that the winding 2 is cooled, forced circulation of the air inside the box body 1 outside is realized, and the cooling effect is improved; the channel formed by the lower clamp body 5 is utilized, and the communicating pipeline 8 is arranged between the lower clamp bodies 5, so that the lower clamp body 5 and the communicating pipeline 8 form a communicated whole, and the clamping and supporting strength of the iron core 3 and the winding 2 is increased; the mouth 9 of blowing that sets up on lower clamp 5 and the intercommunication pipeline 8 is corresponding with 2 bottoms of winding, because the effect of cushion 6, mouth 9 intervals of blowing set up, when guaranteeing support intensity, make and directly get into the 2 clearances of winding from the mouth 9 exhaust wind of blowing, compare with prior art and increased the area of blowing to winding 2 (the crossflow cooling blower among the prior art just blows winding 2 in the clamp 5 outside down, mouth 9 of blowing on the clamp 5 is bloied winding 2 in the clamp 5 outside down in this application, mouth 9 of blowing on the intercommunication pipeline 8 is bloied winding 2 between the clamp 5 down, the cooling rate has been improved.

In an embodiment of the present invention, preferably, as shown in fig. 2, two fans 11 are provided, which are respectively disposed on the two end opening sides of the two lower clamping pieces 5, and are communicated with the same side opening of the two lower clamping pieces 5 through a tee; the cooling device 14 is arranged between the tee joint and the fan 11.

In this embodiment, two fans 11 set up at clamp 5 both ends opening side down, and two motors 11 simultaneous working, the wind after the pressurization assembles at lower plate 5 and communicating pipe 8, further increases the pressure of wind and discharges from blowing mouth 9, simultaneously, when a fan 11 breaks down, under another normal operating's the circumstances, still can be to winding 2's cooling operation, realize not having a power failure and change fan 11 operation.

In an embodiment of the present invention, preferably, as shown in fig. 5 and 6, the cooling device 14 (i.e., the water cooling device) includes a rectangular housing 14a and a cooling pipe 14b (water cooling pipe) disposed inside the rectangular housing 14a, and an inlet and an outlet of the cooling pipe 14b both penetrate through the rectangular housing 14a and the box body 1, and form a circulation with an external cooling water source through a circulation pipe 14 c.

In this embodiment, carry out the heat transfer to the air that flows through with water-cooling mode, reduce the temperature that gets into the air, increase the cooling effect, outside cooling water source can be for water supply pipe network or geothermol power pipe network, recycles reduce cost.

In an embodiment of the present invention, preferably, as shown in fig. 5 and 6, a funnel-shaped storage cavity 14e is provided at the bottom of the rectangular housing 14a, and a water outlet 14g communicated with the water discharge pipe 14f is opened at the bottom of the storage cavity 14e, and the water discharge pipe 14f penetrates through the box body 1.

In this embodiment, the air condenses the water droplet on the water-cooling pipeline behind the water cooling pipeline heat transfer and assembles in leaking hopper-shaped storage chamber 14e, because the effect of air pressure, the water in leaking hopper-shaped storage chamber 14e is discharged outside box 1 under the promotion of pressure fast, reduces the humidity that gets into the interior air of lower clamp 5, prevents that humidity is too big from causing the influence to transformer work.

In one embodiment of the present invention, preferably, as shown in fig. 3 and 4, the lower clip 5 and the air blowing port 9 on the communication pipe 8 form an interrupted rectangle or an interrupted circle, and both correspond to the bottom of the winding 2.

In this embodiment, the air blowing ports 9 are spaced apart from each other by the spacers 6, so that the wind discharged from the air blowing ports 9 directly enters the gaps between the windings 2 while ensuring the supporting strength.

In an embodiment of the present invention, preferably, as shown in fig. 1, 2 and 7, the rectangular hole 13 is provided with a filter screen 15, and the filter screen 15 is slidably disposed in two sliding grooves 16 parallel to each other through a bracket 17.

In this embodiment, the filter screen filters the air that gets into, prevents that debris from being inhaled and causing the emergence of accident, and the filter screen can the activity set up in the spout, can take off when the filter screen is dirty and wash back reuse.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a dry-type transformer, includes the box and sets up a plurality of transformer winding in the box, the winding cover is on the iron core, and the upper and lower both ends of iron core carry out the centre gripping through two last folder and two lower folders respectively and fix, and it is right through the cushion the winding carries out fixed stay, two the folder is in through the support frame setting fixed with it down on the base of bottom half, characterized by: the two lower clamping pieces are square tubes, at least two communicating pipelines are arranged between the two lower clamping pieces, blowing openings are formed in the lower clamping pieces and the communicating pipelines corresponding to the windings, openings in two ends of the two lower clamping pieces are communicated with one end of a ventilating pipeline, the other end of the ventilating pipeline is communicated with a fan, air enters the lower clamping pieces and the communicating pipelines along the ventilating pipeline through the fan, is finally discharged from the blowing openings corresponding to the windings, and is subjected to forced air cooling;

2. Dry-type transformer according to claim 1, characterized in that: the two fans are respectively arranged on the two opening sides of the two ends of the lower clamping pieces and are communicated with the openings on the same side of the two lower clamping pieces through a tee joint.

3. Dry-type transformer according to claim 2, characterized in that: the heat sink sets up between tee bend and the fan, the heat sink includes the rectangle casing and sets up at its inside cooling pipe, and the import and the export of cooling pipe all run through rectangle casing and box to form the circulation through circulating line and outside cooling water source.

4. Dry transformer according to claim 3, whereas: rectangle casing bottom is provided with leaks hopper-shaped and stores the chamber, and stores the chamber bottom and set up the outlet with drainage pipe intercommunication, and drainage pipe runs through the box.

5. Dry transformer according to any of claims 1-4, whereas: the lower clamping piece and the air blowing openings in the communication pipeline form an intermittent rectangle or an intermittent circle, and the intermittent rectangle or the intermittent circle corresponds to the bottom of the winding.

6. Dry-type transformer according to claim 1, characterized in that: the filter screen is arranged at the position of the rectangular hole and is arranged in the two parallel sliding grooves in a sliding mode through the support.