CN217239229U

CN217239229U - Cooling device for power transformer

Info

Publication number: CN217239229U
Application number: CN202221151771.7U
Authority: CN
Inventors: 田强
Original assignee: Hefei Xinlin Power Equipment Co Ltd
Current assignee: Hefei Xinlin Power Equipment Co Ltd
Priority date: 2022-05-14
Filing date: 2022-05-14
Publication date: 2022-08-19
Anticipated expiration: 2032-05-14

Abstract

The utility model discloses a cooling device for power transformer relates to the transformer field, including the box, the inside fixed mounting of box has the winding, the lateral wall upper end fixed mounting of box have with the inside circulation room that communicates of box, the bottom fixed mounting of circulation room has circulating pipe, circulating pipe's bottom and the bottom intercommunication of box, the equal fixed mounting in the outside of circulating pipe and circulation room has the fin. The inside of box is fixed mounting still has the baffle, and the baffle is located between the inside wall of winding and box, and the inside wall fixed connection through connecting plate and box, the utility model discloses a set up circulation room and circulating pipe, the coolant oil at the during operation, hot coolant oil rises and can gather in the circulation room to carry out the precooling in the circulation room, the coolant oil after the precooling can directly flow to circulating pipe in addition, and continue the cooling in circulating pipe, dual cooling, and the cooling effect is better.

Description

Cooling device for power transformer

Technical Field

The utility model relates to a transformer field specifically is a cooling device for power transformer.

Background

A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction. The transformer mainly comprises a coil and an iron core, and has the functions of voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization and the like.

When the transformer works, a large amount of heat is generated, so that when the transformer is used, the transformer needs to be radiated. The heat dissipation convenience that the transformer was commonly used includes: oil immersion type cooling, oil immersion type air cooling, strong oil type water cooling, strong oil guiding type air cooling, water cooling and the like. The cooling oil is used as a heat-conducting medium to dissipate heat of the transformer.

The transformer is mainly cooled in an oil-immersed manner, the heat radiating fins are arranged on the outer side of the transformer, water pipes are arranged on the heat radiating fins, hot oil in a winding and an iron core rises, cold oil in the side wall of an oil tank or a radiator falls to form circulating cooling, but the top and the bottom of the transformer are directly connected together through the circulating water pipes, cooling oil only dissipates heat in the water pipes or the radiator, the heat dissipation effect is poor, and the high-temperature condition can occur when the transformer dissipates heat around the iron core.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cooling device for power transformer to solve the problem that proposes in the above-mentioned background art.

In order to solve the technical problem, the utility model provides a following technical scheme: a cooling device for an electric transformer comprises a box body, wherein a winding is fixedly arranged in the box body, a circulating chamber communicated with the interior of the box body is fixedly arranged at the upper end of the side wall of the box body, a circulating water pipe is fixedly arranged at the bottom of the circulating chamber,

the bottom of circulating pipe communicates with the bottom of box, the outside of circulating pipe and circulation chamber all fixed mounting has the fin.

Preferably, the inside of the box body is also fixedly provided with a partition plate, and the partition plate is positioned between the winding and the inner side wall of the box body and is fixedly connected with the inner side wall of the box body through a connecting plate.

Preferably, a heat conducting plate is fixedly arranged between the partition plate and the inner side wall of the box body.

Preferably, a second heat dissipation plate is fixedly mounted on the outer side of the side wall of the box body for mounting the heat conduction plate.

Preferably, a guide plate is arranged at the outlet at the bottom of the circulating water pipe, is inclined downwards and is fixedly connected with the bottom of the inner side of the box body.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a set up circulation room and circulating pipe, coolant oil at the during operation, the coolant oil of heat rises and can gather in the circulation room to carry out the precooling in the circulation room, the coolant oil after the precooling can directly flow to circulating pipe in addition, and continue to cool off in circulating pipe, dual cooling, the cooling effect is better.

And through setting up the baffle, the box that will hold the cooling oil divide into inner chamber and outer cavity, and at the cooling duty, outer cavity can have the effect that provides liquid and supply to the endless cooling, can be so that the circulation rate of liquid is than faster, improves the cooling effect.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a sectional view of the case of the present invention;

FIG. 4 is a cross-sectional view of the box and the partition plate of the present invention;

fig. 5 is an installation schematic diagram of the flow guide plate of the present invention.

In the figure: 1. a box body; 2. a winding; 3. a partition plate; 4. a circulating water pipe; 5. a heat sink; 6. a circulation chamber; 7. a second heat dissipation plate; 8. a heat conducting plate; 9. a baffle; 10. an inner chamber; 11. an outer chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present embodiment provides a cooling device for an electric power transformer, which includes a box 1, a winding 2 is fixedly installed inside the box 1, the box 1 is used as a main body of the transformer, cooling oil is installed inside the box 1, the winding 2 generates heat under the action of current when in operation, and the heat of the winding is transferred to the cooling oil to dissipate heat of the winding 2 and a silicon chip inside the box 1. The cooling oil also has an insulating effect, the upper end of the side wall of the box body 1 is fixedly provided with a circulating chamber 6 communicated with the inside of the box body 1, and when the cooling oil works, after the cooling oil absorbs heat of the winding 2, the oil with higher temperature rises to the top of the box body 1 due to smaller density. After rising to the top of the tank 1, the cooling oil is collected in the circulation chamber 6, and as the oil rises, the oil circulates in the circulation chamber 6, as shown in fig. 3, and when circulating in the circulation chamber 6, it is primarily radiated. And the outside of circulation chamber 6 is fixed with fin 5, and fin 5 can dispel the heat to the high temperature oil in circulation chamber 6 inside, and the bottom of circulating pipe 4 communicates with the bottom of box 1. Circulation chamber 6's bottom fixed mounting has circulating pipe 4, circulating pipe 4 and circulation chamber 6 intercommunication, the oil of precooling in circulation chamber 6 is low because its temperature is than the oil temperature that continues to rise, consequently the oil density of circulation chamber 6 inside is bigger than, the inside oil of circulation chamber 6 can be followed and is entered into circulating pipe 4, oil is inside entering circulating pipe 4, when circulating pipe 4's inside flows, can further dispel the heat in circulating pipe 4, oil after the cooling can flow to the bottom of box 1 from circulating pipe 4, refrigerated oil can rise gradually after the bottom of box 1 is heated, dispel the heat to winding 2 at the in-process that rises.

The circulating water pipe 4 is of an L-shaped tubular structure.

The outer side of the circulating water pipe 4 is also fixedly provided with a radiating fin 5, and the radiating fin 5 can radiate the circulating water pipe 4, so that the radiating effect of the cooling oil in the circulating water pipe 4 is better. When the oil in the circulating water pipe 4 flows, the temperature of the oil can be made to fall more quickly.

In a further embodiment, in order to improve the heat dissipation effect of the cooling oil, as shown in fig. 4, a partition plate 3 is further fixedly mounted inside the box body 1, the partition plate 3 is located between the inner side walls of the winding 2 and the box body 1, and is fixedly connected with the inner side wall of the box body 1 through a connecting plate, the partition plate 3 does not contact with the inner side wall of the box body 1, and does not contact with the winding 2, the partition plate 3 divides the space between the winding 2 and the box body 1 into two parts, namely, the inner chamber 10 and the outer chamber 11, the inner chamber 10 and the bottom of the outer chamber 11 are communicated with each other, the tops of the two parts are communicated with each other, and the two parts are communicated with the circulation chamber 6.

The inner chamber 10 is in contact with the winding 2, the cooling oil in the inner chamber 10 can directly cool the winding 2, and the cooling oil rises after being heated and rises to the top of the inner chamber of the box body 1 and flows into the circulating chamber 6 from the box body 1.

The outer chamber 11 is in contact with the side wall of the tank 1, and the cooling oil in the outer chamber 11 has a complementary effect on the cooling oil in the inner chamber 10 during cooling of the winding 2.

Under normal conditions, such as in winter, when the weather is relatively cold and the temperature is relatively low, the outside air temperature is relatively low, so the heat dissipation effect of the box body 1 is better, and the heat dissipation effect of the heat dissipation fins 5 is very fast, so when the cooling oil rises to the inside of the circulation chamber 6 and is dissipated by the heat dissipation fins 5, the cooled heat dissipation oil directly flows to the bottom of the box body 1 from the circulation water pipe 4, and then rises from the inner chamber 10 after absorbing heat to gradually dissipate heat of the winding 2. Since the external temperature is relatively low, the heat conducted from the tank 1 to the outside is relatively high, and the temperature of the entire cooling oil in the tank 1 is relatively low, so that the speed of the cooling oil is relatively low when the cooling oil rises, that is, the liquid in the inner chamber 10 rises relatively slowly, the water flow rates in the circulation chamber 6 and the circulation water pipe 4 are relatively low, and the cooling effect is relatively good, so that the liquid can be circulated and cooled in the circulation chamber 6, the circulation water pipe 4, and the inner chamber 10.

In the process of liquid circulation, the liquid in the outer chamber 11 is in contact with the partition plate 3, and the partition plate 3 has a heat conduction effect, so that the temperature on the partition plate 3 can be kept relatively uniform, the temperature of the cooling oil can be basically kept unchanged, and the oil in the outer chamber 11 does not flow too much, and a small amount of liquid flows downwards to circulate along with the cooled oil in operation.

In summer or under the condition that the weather is relatively hot, the external temperature is relatively high, the efficiency of outward heat conduction of the box body 1 is relatively low, the overall temperature of the box body 1 is relatively high, and the temperature of heat conduction oil in the inner chamber 10 in contact with the winding 2 is relatively high, so that the rising speed of cooling oil is relatively high. After rising to the top of the box body 1, the water directly flows into the circulating chamber 6 for preliminary heat dissipation.

Since the liquid in the inner chamber 10 absorbs heat relatively quickly, the amount of liquid entering the circulation chamber 6 is relatively large, and a part of the liquid in the circulation chamber 6 can directly enter the circulation water pipe 4 and flow to the bottom of the tank 1 after further cooling inside the circulation water pipe 4.

Since the cooling oil has a certain viscosity, after the temperature of the cooling oil in the circulating water pipe 4 is reduced, the viscosity is increased, the flow rate is reduced, the overall flow rate of the circulating water pipe 4 is limited, and since the flow rate of the circulating liquid is kept consistent, the overall circulating speed is reduced, the amount of the cooling liquid entering the tank 1 is limited due to the flow rate of the circulating water pipe 4, and the contact time of the cooling oil contacting with the winding is increased, the temperature is higher, but the cooling speed is limited, so that the high-temperature condition is easily caused.

Through setting up baffle 3, after the high temperature oil thing that is comparatively many carries out the primary cooling in circulation chamber 6, because circulating pipe 4's velocity of flow is limited, therefore liquid after the primary cooling can flow in outer cavity 11 to flow to the bottom of box 1 in outer cavity 11, participate in the circulation together with the liquid that circulating pipe 4 flowed out, dispel the heat to winding 2. And the liquid in outer cavity 11 and circulating pipe 4 supplements the cooling oil in inner cavity 10, can make the whole circulation velocity of cooling oil comparatively fast, can improve the radiating effect.

In a further embodiment, in order to improve the heat dissipation effect of the outer chamber 11, heat-conducting plates 8 are fixedly installed between the partition plate 3 and the inner side wall of the box body 1, the heat-conducting plates 8 are of a plurality of uniformly distributed plate-shaped structures, a space for flowing cooling oil is reserved between adjacent heat-conducting plates 8, when the cooling oil flows between the heat-conducting plates 8, the heat-conducting plates can conduct heat to the heat-conducting plates 8, and the heat-conducting plates 8 conduct the heat to the side wall of the box body 1 and conduct the heat to the outside air.

The lateral wall outside that box 1 installed heat-conducting plate 8 still fixed mounting has second heating panel 7, and second heating panel 7 can be given the outside air of box 1 to the heat conduction of box 1 for the radiating effect of heat-conducting plate 8 is better.

As shown in fig. 5, the bottom outlet of the circulating water pipe 4 is provided with a guide plate 9, the inside bottom fixed connection of the box body 1, the guide plate 9 is arranged in a downward inclination manner, the guide plate 9 is positioned at the bottom of the heat conducting plate 8, and an opening is arranged between the bottom of the partition plate 3, so that the liquid passing through the heat conducting plate 8 can flow out from the opening, and directly enters the inner chamber 10, and the liquid in the circulating water pipe 4 also directly flows into the inner chamber 10, so that the liquid in the circulating water pipe 4 and the liquid in the outer chamber 11 respectively flow, and the oil in the two cooling chambers does not influence each other when flowing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cooling device for power transformer, includes box (1), and the inside fixed mounting of box (1) has winding (2), its characterized in that: a circulating chamber (6) communicated with the interior of the box body (1) is fixedly arranged at the upper end of the side wall of the box body (1), a circulating water pipe (4) is fixedly arranged at the bottom of the circulating chamber (6),

the bottom of the circulating water pipe (4) is communicated with the bottom of the box body (1), and cooling fins (5) are fixedly mounted on the outer sides of the circulating water pipe (4) and the circulating chamber (6).

2. The cooling device for an electric power transformer as claimed in claim 1, wherein: the winding box is characterized in that a partition plate (3) is fixedly mounted inside the box body (1), the partition plate (3) is located between the winding (2) and the inner side wall of the box body (1), and the partition plate is fixedly connected with the inner side wall of the box body (1) through a connecting plate.

3. The cooling device for an electric power transformer as claimed in claim 2, wherein: and a heat-conducting plate (8) is fixedly arranged between the partition plate (3) and the inner side wall of the box body (1).

4. A cooling device for an electric power transformer according to claim 3, characterized in that: and a second heat dissipation plate (7) is fixedly mounted on the outer side of the side wall of the box body (1) provided with the heat conduction plate (8).

5. A cooling device for an electric power transformer according to claim 3, characterized in that: a guide plate (9) is arranged at the bottom outlet of the circulating water pipe (4), the guide plate (9) is arranged in a downward inclined mode and is fixedly connected with the bottom of the inner side of the box body (1).