CN214312815U

CN214312815U - A dry-type transformer

Info

Publication number: CN214312815U
Application number: CN202023123775.8U
Authority: CN
Inventors: 叶嘉; 叶剑栋
Original assignee: Shente Group Co ltd
Current assignee: Shente Group Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-09-28
Anticipated expiration: 2030-12-22

Abstract

The application relates to a dry-type transformer, comprising a base, a casing, and a transformer body in the casing, the casing is provided with an interlayer, and an interlayer is provided between the casing and the interlayer, and the inner cavity of the interlayer is a accommodating cavity, and the The transformer body is arranged in the accommodating cavity; the interlayer is provided with an installation hole, an exhaust fan is arranged in the installation hole, and the exhaust fan faces the accommodating cavity; The shell is provided with a cooling box, two ends of the cooling pipe are communicated with the cooling box, and a water pump is connected to the cooling pipe. By arranging the clamping cavity, the accommodating cavity and the exhaust fan, the accommodating cavity is not easy to enter the dust, and the cooling effect of the transformer body is also better; by burying the refrigeration section underground, the cooling water temperature is not easily affected by the outside world in hot summer weather Influence; by setting the flow holes, the hot air can easily enter the clamping cavity through the flow holes for cooling.

Description

Dry-type transformer

Technical Field

The application relates to the field of transformers, in particular to a dry-type transformer.

Background

Dry transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and other places, and simply, dry transformers refer to transformers in which the core and windings are not immersed in insulating oil.

When the dry type transformer works, the dry type transformer has larger heat productivity, so that the temperature inside the transformer is higher, the insulation heat aging of the coil is caused, and the service life of the transformer is influenced.

The utility model discloses a utility model patent that publication number is CN211507322U discloses a novel cooling structure of dry-type transformer, including the oversheath, the oversheath is inside to be fixed with the radiating block through the fixed block, the open-top department of oversheath is fixed with the protection network through the second mount, the top of protection network is fixed with the scavenger fan through first mount.

In view of the above-mentioned related arts, the inventor believes that the cooling structure cools the inside of the dry type transformer by blowing heat in the dry type transformer through the ventilation, but the inside of the transformer is communicated with the outside, and after ventilation for a long time, dust easily enters the inside of the transformer, and covers the surface of the inner part of the transformer, so that the heat dissipation capability is reduced.

SUMMERY OF THE UTILITY MODEL

In order to improve, the dust easily gets into the transformer inside, and the dust covers the surface of transformer inner part, makes its heat-sinking capability reduce, this application provides a dry-type transformer.

The application provides a dry-type transformer adopts following technical scheme:

a dry-type transformer comprises a base, a shell and a transformer body in the shell, wherein an interlayer is arranged in the shell, a clamping cavity is arranged between the shell and the interlayer, an inner cavity of the interlayer is a containing cavity, and the transformer body is arranged in the containing cavity; the interlayer is provided with a mounting hole, an exhaust fan is arranged in the mounting hole, and the front surface of the exhaust fan faces the accommodating cavity;

the cooling device is characterized in that a cooling pipe is arranged in the clamping cavity, a cooling box is arranged on the shell, two ends of the cooling pipe are communicated with the cooling box, and a water pump is connected to the cooling pipe.

By adopting the technical scheme, the base is arranged on the ground, the shell is arranged on the base, the transformer body is arranged in the shell, and the heat generation quantity of the winding and the iron core of the transformer body is large when the transformer body works, so that the transformer body is easy to be shortened after being heated for a long time. The intermediate layer will press from both sides the chamber and separate with holding the chamber, is equipped with the cooling water in the cooler bin, and water pump drive cooling water flows along the cooling tube, and the cooling tube sets up in pressing from both sides the intracavity, makes the interior temperature reduction of pressing from both sides intracavity, and the cold air who will cool off the intracavity is carried the entering through the air discharge fan and is held the intracavity and cool down transformer body.

The clamping cavity is arranged between the interlayer and the shell and is not communicated with the outside, so that dust is not easy to enter the accommodating cavity. Meanwhile, the temperature in the clamping cavity is lower than that in the accommodating cavity, so that air blown out by the exhaust fan is cooler, cold air can blow to the transformer body, and the cooling effect of the transformer body is better.

Optionally, the cooling pipe includes a cooling section and a refrigeration section, the cooling section is disposed in the accommodating cavity, and the refrigeration section is buried underground.

Through adopting above-mentioned technical scheme, the cooling tube is including supplying cold section, refrigeration section, and the refrigeration section is buried in the underground, and when summer is hot down, the cooling water is scalded by sunshine sun easily in the cooler bin, makes the cooling effect of cooling water not good. The underground temperature is usually lower than the ground, so that the temperature of cooling water in the refrigerating section is lower, the temperature reduction speed is higher, and the cooling water with higher temperature in the original cooling box flows to the cooling section after being cooled, so that the temperature of the cooling water is still lower. The refrigeration section is buried underground, the cooling water is cooled without an external refrigerator, resources are saved, and meanwhile, the temperature of the refrigeration water is not easily affected by the external hot weather.

Optionally, the refrigeration section is disposed below the base.

Through adopting above-mentioned technical scheme, during hot weather of summer day, dry-type transformer has the ability of sheltering from, makes base below temperature lower, buries the refrigeration section in the soil of base below, makes the temperature of refrigeration water keep lower to it is better to make refrigeration effect.

Optionally, the front face of the exhaust fan faces the winding and the iron core of the transformer body.

By adopting the technical scheme, when the transformer body works, the heat generated at the winding and the iron core is strongest, the winding coil is easy to be thermally oxidized and damaged, the exhaust fan is opposite to the winding and the iron core of the transformer body, and the winding and the iron core are cooled, so that the winding coil is difficult to thermally oxidize and damage, and the service life of the transformer body is prolonged.

Optionally, a circulation hole is formed at the position of the interlayer opposite to the front face of the exhaust fan.

Through adopting above-mentioned technical scheme, the opening is just right with the air discharge fan, and the air that the air discharge fan blew out blows off gets into through the opening easily and presss from both sides the chamber and cool off that winding and iron core formed, makes hot-blast rapid cooling to it is effectual to make to hold the intracavity cooling.

Optionally, the circulation hole is circumferentially provided with a guide plate, and the guide plate extends in a direction away from the circulation hole along a direction close to the exhaust fan.

By adopting the technical scheme, when wind generated by the exhaust fan blows over the winding and the iron core, the winding and the iron core have certain blocking effect on the wind, so that the wind direction is changed, and the wind direction is not easy to enter the clamping cavity from the circulation hole. Through the arrangement of the guide plate, wind flows into the circulation hole along the guide plate, and the hot wind is not easy to wander in the accommodating cavity.

Optionally, a heat insulation layer is arranged on the inner wall of the outer shell.

By adopting the technical scheme, the heat insulation layer has a better heat insulation effect, so that cold air in the interlayer is not easy to dissipate due to heat conduction of the shell.

Optionally, the outer wall of the cooling box is provided with a liquid level meter.

Through adopting above-mentioned technical scheme, the level gauge is used for showing the liquid level of the cooling water in the cooler bin, when making the cooling water not enough, makes things convenient for the staff to monitor and to add the cooling water in the cooler bin.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the clamping cavity, the accommodating cavity and the exhaust fan, dust is not easy to enter the accommodating cavity, and meanwhile, the cooling effect of the transformer body is good;

2. the refrigeration section is buried underground, so that the temperature of cooling water is not easily influenced by the outside in hot weather in summer;

3. through the arrangement of the circulation holes, hot air can easily enter the clamping cavity through the circulation holes for cooling.

Drawings

Fig. 1 is an overall schematic diagram of a dry-type transformer according to an embodiment of the present application.

Fig. 2 is a schematic view of the structure inside the housing of the embodiment.

Description of reference numerals: 1. a base; 2. a housing; 21. an accommodating chamber; 22. a clamp cavity; 23. a thermal insulation layer; 3. a transformer body; 4. an interlayer; 41. mounting holes; 411. an exhaust fan; 42. a flow-through hole; 421. a guide plate; 5. a cooling tank; 51. a cooling tube; 511. a cooling section; 512. a refrigeration section; 52. a water pump; 53. a liquid level meter.

Detailed Description

The present application will be described in further detail below with reference to fig. 1 and 2.

The embodiment of the application discloses a dry-type transformer. Referring to fig. 1 and 2, the dry type transformer includes a base 1, a case 2, and a dry type transformer in the case 2.

Referring to fig. 2, a heat insulation layer 23 is fixed on the inner wall of the housing 2, and the heat insulation layer 23 is an expanded polystyrene board, which has a good heat insulation effect. However, the heat insulation layer 23 has strong water absorption and reduces heat insulation capability after absorbing water, so that the heat insulation layer 23 is fixed on the inner wall of the shell 2 to isolate the heat insulation layer 23 from the outside air, and the heat insulation layer 23 is not easy to absorb moisture in the air, thereby keeping good heat insulation capability.

Referring to fig. 2, an interlayer 4 is fixed in the housing 2, and the interlayer 4 divides the inner cavity of the housing 2 into an interlayer cavity 22 and a containing cavity 21. Press from both sides the chamber 22 and set up between shell 2 inner wall and intermediate layer 4, hold the chamber 21 and set up in intermediate layer 4, press from both sides the chamber 22 and set up along the circumference that holds chamber 21.

Referring to fig. 2, a cooling tank 5 for containing cooling water is fixed to an outer wall of the housing 2, and a level gauge 53 is fixed to an outer wall of the cooling tank 5, and the level gauge 53 is used for displaying a level of cooling water to the inside. The cooling tank 5 is connected to a cooling pipe 51, and both ends of the cooling pipe 51 communicate with a cooling direction to form a circuit. The cooling pipe 51 has one end communicating with the top of the cooling tank 5 and the other end communicating with the bottom of the cooling tank 5.

Referring to fig. 2, a water pump 52 for driving the flow of cooling water is connected to the cooling pipe 51, and the water pump 52 is provided at an end portion of the cooling pipe 51 connected to the bottom of the cooling tank 5. The cooling pipe 51 comprises a refrigeration section 512 and a cooling section 511, and the water pump 52 drives the cooling water in the cooling box 5 to flow to the refrigeration section 512 and the cooling section 511 in sequence and finally flow back to the cooling box 5.

Referring to fig. 2, the cooling section 512 is buried under the base 1, and the cooling section 511 is disposed in the clamping chamber 22. The cooling pipe 51 is a copper pipe, and copper has better heat-conducting property. The cooling section 511 is disposed along the circumferential direction of the accommodating chamber 21, and cooling water in the cooling section 511 flows to lower the surface temperature of the cooling section 511, thereby lowering the temperature in the clamping chamber 22.

Referring to fig. 2, a mounting hole 41 is formed in the side wall of the interlayer 4, an exhaust fan 411 is fixed in the mounting hole 41, the exhaust fan 411 is circumferentially fixed on the inner wall of the mounting hole 41, the front surface of the exhaust fan 411 faces the accommodating cavity 21, and the position height of the exhaust fan 411 is opposite to the winding and the iron core of the transformer body 3. The air discharge fan 411 blows in cold air in the clamping cavity 22 into the accommodating cavity 21, and cools the winding and the iron core of the transformer body 3, so that the temperature of the winding and the temperature of the iron core are timely cooled, the winding coil is not easily thermally oxidized to cause damage, and the service life of the transformer body 3 is prolonged.

Referring to fig. 2, a circulation hole 42 is formed at a position of the interlayer 4 opposite to the front surface of the exhaust fan 411, and a guide plate 421 is fixed to the periphery of the circulation hole 42. One end of the guide plate 421 is fixed to the opening of the circulation hole 42, and the other end of the guide plate 421 is inclined in a direction away from the circulation hole 42 in a direction close to the exhaust fan 411. The guide plate 421 is in a ring shape like a trumpet, that is, the inner ring of the guide plate 421 is fixed to the opening of the circulation hole 42, and the outer ring of the guide plate 421 protrudes out of the surface of the interlayer 4 in the direction of the accommodating cavity 21.

The implementation principle of the dry-type transformer in the embodiment of the application is as follows: when the dry-type transformer is used, the dry-type transformer body 3 works in the accommodating cavity 21 and generates heat. The water pump 52 circulates the cooling water in the cooling box 5 along the cooling section 512 and the cooling section 511, so that the cold air in the clamping cavity 22 is blown to the coil group and the iron core of the dry-type transformer by the exhaust fan 411 at the bottom of the temperature cavity in the clamping cavity 22, thereby cooling the transformer body 3.

In conclusion, the air in the dry type transformer is not circulated with the outside, so that the transformer body 3 is not easy to be covered with dust. Simultaneously, will press from both sides chamber 22 and hold chamber 21 and separate, make the cold air in pressing from both sides chamber 22 cool down to the great winding of heat and iron core department, make the cooling effect of winding and iron core department better, the winding is difficult for the thermal damage to make dry-type transformer's life extension.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a dry-type transformer, includes transformer body (3) in base (1), shell (2), its characterized in that: an interlayer (4) is arranged in the shell (2), a clamping cavity (22) is arranged between the shell (2) and the interlayer (4), an inner cavity of the interlayer (4) is a containing cavity (21), and the transformer body (3) is arranged in the containing cavity (21); a mounting hole (41) is formed in the interlayer (4), an exhaust fan (411) is arranged in the mounting hole (41), and the front face of the exhaust fan (411) faces the accommodating cavity (21);

be equipped with cooling tube (51) in pressing from both sides chamber (22), be equipped with cooler bin (5) on shell (2), the both ends and the cooler bin (5) intercommunication of cooling tube (51), be connected with water pump (52) on cooling tube (51).

2. A dry-type transformer as claimed in claim 1, wherein: the cooling pipe (51) comprises a cold supply section (511) and a refrigeration section (512), the cold supply section (511) is arranged in the accommodating cavity (21), and the refrigeration section (512) is buried underground.

3. A dry-type transformer as claimed in claim 2, wherein: the refrigeration section (512) is arranged below the base (1).

4. A dry-type transformer as claimed in claim 3, wherein: the front face of the exhaust fan (411) is over against the winding and the iron core of the transformer body (3).

5. A dry-type transformer as claimed in claim 4, wherein: the right opposite position of the interlayer (4) and the front surface of the exhaust fan (411) is provided with a circulation hole (42).

6. A dry-type transformer as claimed in claim 5, wherein: the circulation hole (42) is circumferentially provided with a guide plate (421), and the guide plate (421) extends towards the direction far away from the circulation hole (42) along the direction close to the exhaust fan (411).

7. A dry-type transformer as claimed in claim 1, wherein: and a heat insulation layer (23) is arranged on the inner wall of the shell (2).

8. A dry-type transformer as claimed in claim 1, wherein: and a liquid level meter (53) is arranged on the outer wall of the cooling box (5).