CN207852444U - A cooling device for a transformer - Google Patents

Abstract

The utility model discloses a kind of heat dissipating device of transformer, including trapezoidal fuel tank, oil inlet valve and fuel-displaced valve and the chimney that is arranged in trapezoidal fuel tank；Trapezoidal fuel tank includes bottom plate, is relatively fixed and is connected to two inclined plates of bottom plate both sides, is relatively fixed the top plate for being connected to two straight panels of the another both sides of bottom plate and being fixedly connected at the top of inclined plate and straight panel；The top plate of trapezoidal fuel tank is exposed in the upper end trepanning of chimney, and the bottom plate of trapezoidal fuel tank is exposed in the lower end trepanning of the chimney.Traditional multiple flaky radiators are designed as trapezoidal shape radiator by the utility model, insulating oil is full of in trapezoidal fuel tank, and multiple small-sized chimneys are installed in trapezoidal fuel tank, trapezoidal fuel tank is exposed in the trepanning of chimney both ends respectively, it is transmitted using thermal convection current, heat, stack effect realization air free convection in chimney, takes away ladder type fuel tank interior insulation oil heat indirectly, not only reasonable for structure, maintenance is simply, and transformer heat dissipation effect is improved, reduce the workload of installation and the maintenance of radiator.

Description

A cooling device for a transformer

technical field

The utility model belongs to auxiliary facilities of power transformers, in particular to a heat dissipation device for strengthening transformer insulating oil.

Background technique

Traditional forced oil circulation transformers and self-cooling heat sinks have the following disadvantages. Forced oil circulation not only requires the installation of multiple sets of fans, but also has large vibration and noise and large losses, and frequent radiator fan failures require cumbersome fan replacement. In addition, strong oil and self-cooling heat dissipation devices need to be installed with sheet radiators. The number of radiators is large, and the radiator body is thin, which is easy to bump, deform or damage, resulting in oil leakage. At the same time, in the field operation experience, the number of sheet radiators installed is large and heavy, and installation and maintenance bring too much inconvenience.

Utility model content

The purpose of the utility model is to reduce the installation and maintenance workload of the transformer radiator and improve the heat dissipation efficiency of the transformer radiator.

In order to achieve the above object, the technical scheme that the utility model takes is as follows:

A heat dissipation device for a transformer, comprising a trapezoidal oil tank, an oil inlet valve and an oil outlet valve arranged on the side of the trapezoidal oil tank, and a chimney arranged up and down through the trapezoidal oil tank;

The trapezoidal fuel tank includes a bottom plate, two inclined plates relatively fixedly connected to both sides of the bottom plate, two straight plates relatively fixedly connected to the other two sides of the bottom plate, and a top plate fixedly connected to the top of the inclined plate and the straight plate;

The upper opening of the chimney exposes the top plate of the trapezoidal fuel tank, and the lower end of the chimney exposes the bottom plate of the trapezoidal fuel tank.

As a further improvement of the utility model, the oil inlet valve and the oil outlet valve are arranged on the same straight plate of the trapezoidal oil tank, the oil inlet valve is higher than the oil outlet valve, and the oil inlet valve is connected with the upper oil layer of the transformer oil tank , the oil outlet valve communicates with the lower oil layer of the transformer oil tank.

As a further improvement of the utility model, the number of the oil inlet valves is at least two, and the number of the oil outlet valves is at least two.

As a further improvement of the utility model, the chimney is a variable-diameter channel, and the diameter of the opening at the lower end is greater than the diameter of the opening at the upper end.

As a further improvement of the utility model, the number of said chimneys is more than four.

Compared with the prior art, the beneficial effects obtained by the utility model are as follows:

The utility model refits a plurality of traditional sheet radiators into a large trapezoidal radiator. The trapezoidal fuel tank is filled with insulating oil, and a plurality of small chimneys are installed in the trapezoidal fuel tank. The holes at both ends of the chimney respectively expose the trapezoidal fuel tank. Use heat convection, heat transfer, and chimney effect to realize natural convection of air in the chimney, and indirectly take away the heat of insulating oil in the ladder-type oil tank. Not only is the structure reasonable, the maintenance is simple, but also the heat dissipation effect of the transformer is improved, and the installation and maintenance of the radiator are reduced. quantity.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is the sectional structural representation of the utility model.

In the accompanying drawings: 1 trapezoidal fuel tank, 1-1 bottom plate, 1-2 inclined plate, 1-3 straight plate, 1-4 top plate, 2 oil inlet valve, 3 oil outlet valve, 4 chimney, 41 upper end opening, 42 lower end opening hole.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in the accompanying drawings 1-2, a heat dissipation device for a transformer includes a trapezoidal oil tank 1, an oil inlet valve 2 and an oil outlet valve 3 arranged on the side of the trapezoidal oil tank 1, and a chimney 4 arranged vertically through the trapezoidal oil tank 1; The trapezoidal fuel tank 1 includes a bottom plate 1-1, two inclined plates 1-2 relatively fixedly connected to both sides of the bottom plate 1-1, and two straight plates 1-3 relatively fixedly connected to the other two sides of the bottom plate 1-1 And the top plate 1-4 that is fixedly connected on the top of the inclined plate 1-2 and the straight plate 1-3; the upper end opening 41 of the chimney 4 exposes the top plate 1-4 of the trapezoidal fuel tank 1, and the lower end opening 42 of the chimney 4 exposes The bottom plate 1-1 of the trapezoidal fuel tank 1. The oil inlet valve 2 and the oil outlet valve 3 are arranged on the same straight plate 1-3 of the trapezoidal oil tank 1, the oil inlet valve 2 is higher than the oil outlet valve 3, and the oil inlet valve 2 is connected to the upper oil layer of the transformer oil tank The oil outlet valve 3 communicates with the lower oil layer of the transformer oil tank. There are at least two oil inlet valves 2 and at least two oil outlet valves 3 . The chimney 4 is a variable-diameter channel, and the diameter of the opening 42 at the lower end is greater than the diameter of the opening 41 at the upper end. The number of said chimneys 4 is more than four.

When the transformer is in normal operation, the temperature of the upper oil layer of the transformer oil tank is higher than that of the lower oil layer, and the upper oil layer with higher temperature enters the trapezoidal oil tank 1 through the oil inlet valve 2 on the side of the trapezoidal oil tank 1, and is installed in the trapezoidal oil tank 1 by using the chimney principle. A plurality of small chimneys 4, the oil inlet valve 2 is higher than the oil outlet valve 3, that is, the oil temperature at the oil inlet valve 5 is higher than that at the oil outlet valve 3, and the heat transfer effect causes the temperature of the upper part of the chimney 4 to be higher than The lower part uses the principle of rising hot air to continuously discharge hot air from the upper hole 41 of the chimney 4. The higher the temperature of the upper part, the faster the air movement speed, so that the fresh cold air from the outside flows through the hole 42 at the lower end of the chimney 4. Being drawn in, the whole process of automatic and rapid movement of the airflow from the bottom of the chimney 4 is realized, and the flowing air exchanges heat with the insulating oil, which indirectly takes away the heat of the insulating oil. The insulating oil after heat exchange and cooling flows back from the oil outlet valve 3 to the lower oil layer of the transformer oil tank. The utility model does not need any auxiliary equipment, and realizes high efficiency and energy saving. Effectively reduces the number of sheet radiators, reducing the overall weight and volume of the transformer.

The utility model refits a plurality of traditional sheet radiators into a large trapezoidal radiator. The trapezoidal fuel tank is filled with insulating oil, and a plurality of small chimneys are installed in the trapezoidal fuel tank. The holes at both ends of the chimney respectively expose the trapezoidal fuel tank. Use heat convection, heat transfer, and chimney effect to realize natural convection of air in the chimney, and indirectly take away the heat of insulating oil in the ladder-type oil tank. Not only is the structure reasonable, the maintenance is simple, but also the heat dissipation effect of the transformer is improved, and the installation and maintenance of the radiator are reduced. quantity. The efficiency of the variable pressure radiator is improved, and the utility model has wide popularization and application value.

The above-mentioned implementations are only preferred embodiments of the present utility model, rather than an exhaustive list of feasible implementations of the present utility model. For those skilled in the art, any obvious changes made without departing from the principle and spirit of the utility model should be considered to be included in the protection scope of the claims of the utility model.

Claims (5)

1. A heat dissipation device for a transformer, characterized in that it includes a trapezoidal oil tank (1), an oil inlet valve (2) and an oil outlet valve (3) arranged on the side of the trapezoidal oil tank (1), and an oil outlet valve (3) arranged vertically through the trapezoidal oil tank (1) within the chimney (4); The trapezoidal fuel tank (1) includes a bottom plate (1-1), two inclined plates (1-2) relatively fixedly connected to both sides of the bottom plate (1-1), and relatively fixedly connected to the bottom plate (1-1) Two straight plates (1-3) on both sides and a top plate (1-4) fixedly connected to the top of the inclined plate (1-2) and the straight plate (1-3); The upper opening (41) of the chimney (4) exposes the top plate (1-4) of the trapezoidal fuel tank (1), and the lower end opening (42) of the chimney (4) exposes the bottom plate (1) of the trapezoidal fuel tank (1). -1). 2. A transformer cooling device according to claim 1, characterized in that: the oil inlet valve (2) and the oil outlet valve (3) are arranged on the same straight plate (1-3) of the trapezoidal oil tank (1) , the oil inlet valve (2) is higher than the oil outlet valve (3), the oil inlet valve (2) is connected with the upper oil layer of the transformer oil tank, and the oil outlet valve (3) is connected with the lower oil layer of the transformer oil tank Pass. 3. The heat dissipation device for a transformer according to claim 2, characterized in that there are at least two oil inlet valves (2) and at least two oil outlet valves (3). 4. A heat dissipation device for a transformer according to claim 3, characterized in that the chimney (4) is a variable-diameter channel, and the diameter of the opening (42) at the lower end is larger than the diameter of the opening (41) at the upper end. 5. A heat dissipation device for a transformer according to claim 4, characterized in that: the number of said chimneys (4) is more than four.