CN220914018U

CN220914018U - Transformer cooling device

Info

Publication number: CN220914018U
Application number: CN202322546951.6U
Authority: CN
Inventors: 孙政阳; 倪忻洲
Original assignee: Hubei Energy Group Ezhou Power Generation Co ltd
Current assignee: Hubei Energy Group Ezhou Power Generation Co ltd
Priority date: 2023-09-19
Filing date: 2023-09-19
Publication date: 2024-05-07
Anticipated expiration: 2033-09-19

Abstract

The utility model provides a transformer cooling device, which comprises a transformer body and an outer shell arranged outside the transformer body, wherein a plurality of heat dissipation grids are fixedly connected to four side end surfaces of the outer shell, grid grooves are formed between the heat dissipation grids, and a plurality of heat dissipation holes are formed in the outer shell corresponding to the grid grooves; the cooling grid is internally and spirally provided with a cooling pipeline, the head and tail ends of the cooling pipeline are respectively connected with the upper end and the lower end of the refrigeration tank, the bottom of the refrigeration tank is provided with a circulating pump, and one end of the circulating pump is connected with the cooling pipeline. When the transformer starts to work, the cooling liquid in the spiral cooling pipeline arranged in the heat dissipation grating circulates in the pipe under the power action of the circulating pump, and under the rapid refrigeration action of the refrigeration tank, even if the ambient temperature is higher, the cooling liquid is always kept at a lower temperature and exchanges heat with the transformer body in the outer shell body, so that the temperature of the transformer body is reduced, the heat exchange efficiency of the transformer is greatly improved, and the high-efficiency operation of the transformer is ensured.

Description

Transformer cooling device

Technical Field

The utility model relates to the technical field of transformer cooling, in particular to a transformer cooling device.

Background

Transformers are one of the main devices of the substation for transforming high voltages into voltages of various levels required by the user. However, in the daily operation of the transformer, a large amount of heat is generated due to the loss of the winding and the iron core of the transformer, and the generated heat needs to be timely dissipated through cooling measures.

In the conventional transformer cooling measures, such as an oil immersed circulating transformer cooler, heat dissipation is carried out on a transformer by means of a circulating cooling mode. The cooling mode mainly relies on convection circulation of cooling fins of the transformer and air with low temperature in the environment to dissipate heat, but most of cooling modes are low in cooling efficiency, especially in high-temperature environments, the environment temperature is high, and the cooling efficiency is lower.

Disclosure of utility model

Aiming at the defects existing in the prior art, the utility model provides a transformer cooling device, which solves the problems that in the prior art, heat is radiated by utilizing a radiating fin of a transformer and air with lower temperature in the environment to perform convection circulation, most of such cooling modes have low radiating efficiency, and particularly in a high-temperature environment, the environment temperature is higher, and the radiating efficiency is lower.

According to one technical scheme of the utility model, the transformer cooling device comprises a transformer body and an outer shell arranged outside the transformer body, wherein a plurality of heat dissipation grids are fixedly connected to four side end faces of the outer shell, grid grooves are formed between the heat dissipation grids, and a plurality of heat dissipation holes are formed in the outer shell corresponding to the grid grooves; the cooling grid is internally and spirally provided with a cooling pipeline, the head and tail ends of the cooling pipeline are respectively connected with the upper end and the lower end of the refrigeration tank, the bottom of the refrigeration tank is provided with a circulating pump, and one end of the circulating pump is connected with the cooling pipeline.

Furthermore, one of the two opposite side end surfaces of the outer shell is provided with an air inlet fan, the other one is provided with an exhaust fan, refrigeration convection is formed, and the air inlet fan and the exhaust fan are both positioned outside the corresponding heat dissipation grids.

Furthermore, the air inlet fan and the exhaust fan are fixedly connected to the base integrally connected with the bottom of the outer shell through the fan frame.

Further, cooling oil is arranged in the cooling pipeline.

Furthermore, the circumference of the refrigerating tank is provided with a plurality of semiconductor refrigerating sheets, the refrigerating ends of the semiconductor refrigerating sheets are arranged in the tank, and the radiating ends are arranged outside the tank and are provided with filter cores in the tank.

Further, the heat radiation grille is integrally connected to the outer case.

Compared with the prior art, the utility model has the following beneficial effects:

When the transformer starts to work, the cooling liquid in the spiral cooling pipeline arranged in the heat dissipation grating circulates in the pipe under the power action of the circulating pump, and under the rapid refrigeration action of the refrigeration tank, even if the ambient temperature is higher, the cooling liquid is always kept at a lower temperature and exchanges heat with the transformer body in the outer shell body, so that the temperature of the transformer body is reduced, the heat exchange efficiency of the transformer is greatly improved, and the high-efficiency operation of the transformer is ensured.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of an overall axial measurement of an embodiment of the present utility model;

FIG. 2 is a schematic front view of the whole embodiment of the present utility model;

FIG. 3 is a schematic top view of an embodiment of the present utility model;

FIG. 4 is a schematic diagram of an axial structure of a cooling grid connected to a cooling pipe according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a heat dissipation pipeline according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the cross-sectional structure of A-A in FIG. 5.

In the drawings, the structural names represented by the reference numerals are as follows:

1. A transformer body; 2. an outer housing; 21. a base; 3. a heat-dissipating grille; 31. a grid groove; 4. a cooling pipe; 41. cooling oil; 5. a refrigeration tank; 51. a semiconductor refrigeration sheet; 511. a cold end is manufactured; 512. a heat dissipating end; 52. a filtration inner core; 6. an air inlet fan; 61. a motor; 62. a fan blade; 63. a fan frame; 7. an exhaust fan; 8. and a circulation pump.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, shall fall within the scope of the utility model.

The embodiment of the utility model provides a transformer cooling device, as shown in fig. 1-6, which comprises a transformer body 1 and an outer shell 2 arranged outside the transformer body, wherein a plurality of heat dissipation grids 3 are oppositely arranged on the side end surface of the outer shell 2, and heat dissipation holes are formed in the outer shell 2 corresponding to grid grooves 31, so that natural heat dissipation can be performed;

The cooling grid 3 is internally and spirally provided with a cooling pipeline 4, the head end and the tail end of the cooling pipeline 4 are respectively connected with the upper end and the lower end of the refrigerating tank 5, a circulating pump 8 is arranged at the bottom of the refrigerating tank 5 and is connected with one end of the cooling pipeline 4, so that circulating flow of cooling medium in the cooling pipeline 4 is facilitated, and the transformer is cooled through circulating of the cooling medium in the cooling pipeline 4 and keeping refrigeration of the refrigerating tank 5.

The cooling medium is provided as cooling oil 41.

One of two opposite side end surfaces of the outer shell 2 is provided with an air inlet fan 6, the other one is provided with an exhaust fan 7, external air is sucked into the heat radiation grille 3 through the air inlet fan 6, and hot air is discharged out of the heat radiation grille 3 through the exhaust fan 7, so that refrigeration convection is formed, and the heat radiation efficiency is improved.

The circumference of the refrigerating tank 5 is provided with a plurality of semiconductor refrigerating sheets 51, a refrigerating end 511 of each semiconductor refrigerating sheet 51 is arranged in the tank to cool a section of the cooling pipeline 4 positioned in the refrigerating tank 5, a radiating end 512 is arranged outside the tank, and a filtering inner core 52 is arranged in the tank to filter impurities of the cooling oil 41; the working principle of the semiconductor refrigeration sheet 51 is as follows: the semiconductor cooling fin 51 is an electronic cooling device based on the Peltier effect, and is also called a thermoelectric cooling fin. It is composed of a plurality of p-type and n-type semiconductor materials and produces a cooling or heating effect by applying an electric current between these materials. When a current is passed through the interface between two different materials, the temperature of one of the materials will increase and the temperature of the other material will decrease. At the same time, heat removed from the elevated temperature material is transferred to the reduced temperature material portion by means of electron conduction, convection, radiation, etc. This overall process is the Peltier effect. The main working principle of the semiconductor refrigeration piece 51 is that according to the second law of thermodynamics, heat is absorbed from a high-temperature object (Qc) and transferred to the refrigeration piece for cooling (Tc) through current; and at the same time, the absorbed heat is moved through the reverse side of the cooling sheet and discharged into the low-temperature object (Th). The only source of energy for this process is from externally added current.

The air inlet fan 6 and the exhaust fan 7 are connected to the base 21 integrally connected to the bottom of the outer shell 2 through a fan frame 63, air flows are exchanged, fan blades 62 are arranged in the fan frame 63 of the air inlet fan 6 and the exhaust fan 7, and the rear end of a rotating shaft of the fan blades 62 is connected with the motor 61.

The heat radiation grille 3 is integrally connected to the outer shell 2, so that the structure is firmer.

The working principle of the transformer cooling device is as follows: when the transformer starts to work, the cooling oil 41 inside the spiral cooling pipeline 4 arranged inside the heat radiation grille 3 circulates in the pipe under the action of the circulating pump 8, and under the rapid refrigeration effect of the semiconductor refrigeration sheets 51 inside the refrigeration tank 5, even if the ambient temperature is higher, the cooling oil 41 is always kept at a lower temperature and exchanges heat with the transformer body 1 inside the outer shell 2, so that the temperature of the transformer body 1 is reduced, and under the action of the air inlet fan 6 and the air outlet fan 7, the outside air is sucked into the heat radiation grille 3 through the air inlet fan 6, and the hot air is discharged out of the heat radiation grille 3 through the air outlet fan 7, so that convection is formed, and the heat radiation efficiency is improved.

The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form 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 the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims

1. The cooling device is applied to a transformer body (1), an outer shell (2) is arranged outside the transformer body (1), and is characterized in that a plurality of heat dissipation grids (3) are fixedly connected to four side end faces of the outer shell (2), grid grooves (31) are formed between the heat dissipation grids (3), and a plurality of heat dissipation holes are formed in the outer shell (2) corresponding to the grid grooves (31);

the cooling grid (3) is internally provided with a cooling pipeline (4) in a spiral mode, the head end and the tail end of the cooling pipeline (4) are respectively connected with the upper end and the lower end of the refrigeration tank (5), the bottom of the refrigeration tank (5) is provided with a circulating pump (8), and one end of the circulating pump (8) is connected with the cooling pipeline (4).

2. A transformer cooling device according to claim 1, wherein one of the two opposite side faces of the outer housing (2) is provided with an air inlet fan (6) and the other is provided with an air outlet fan (7) for forming a cooling convection, and wherein the air inlet fan (6) and the air outlet fan (7) are located outside the corresponding heat radiation grille (3).

3. A transformer cooling device according to claim 2, characterized in that the inlet fan (6) and the exhaust fan (7) are fixedly connected to a base (21) integrally connected to the bottom of the outer casing (2) through a fan frame (63).

4. A transformer cooling device according to claim 1, characterized in that the cooling conduit (4) is internally provided with cooling oil (41).

5. A transformer cooling device according to claim 1, characterized in that the cooling tank (5) is provided with a number of semiconductor cooling fins (51) circumferentially, that the cooling ends (511) of the semiconductor cooling fins (51) are arranged in the tank, that the heat dissipation ends (512) are arranged outside the tank and that the filter core (52) is arranged in the tank.

6. A transformer cooling device according to claim 1, characterized in that the heat radiation grille (3) is integrally connected to the outer housing (2).