CN212434434U

CN212434434U - Improved heat dissipation system for hydropower station transformer

Info

Publication number: CN212434434U
Application number: CN202021389621.0U
Authority: CN
Inventors: 文兴; 李达蔚; 甘祖鹏; 陈彪; 朱国相; 董万发
Original assignee: Datang Eryuan Fengyu Wind Power Co ltd
Current assignee: Datang Eryuan Fengyu Wind Power Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-01-29
Anticipated expiration: 2030-07-15

Abstract

The utility model discloses an improved generation cooling system for power station transformer relates to transformer heat dissipation technical field. The heat dissipation system comprises a heat dissipation device, a main water inlet pipe, a main water return pipe and a tail water heat exchange system, wherein the heat dissipation device is composed of a plurality of heat dissipation pipes attached to the surface of the transformer, one end of each heat dissipation pipe is communicated with the main water inlet pipe, and the other end of each heat dissipation pipe is communicated with the main water return pipe; the tail water heat exchange system is arranged in tail water of the hydropower station, a water outlet of the tail water heat exchange system is connected with a water inlet of the water pump through the first control valve, a water outlet of the water pump is communicated with the main water inlet pipe through the second control valve, and a water inlet of the tail water heat exchange system is communicated with the main water return pipe. The radiating pipe is attached to the surface of the transformer, the transformer is cooled through water, the water after heat absorption is cooled with tail water heat exchange in a pipeline of a tail water heat exchange system, and is recycled to the radiating pipe to cool the transformer, the rectification period is short, the cost is low, the structure of the transformer is not required to be reformed, and the rectification difficulty is low.

Description

Improved heat dissipation system for hydropower station transformer

Technical Field

The utility model relates to a transformer heat dissipation technical field, concretely relates to improved generation cooling system for power station transformer.

Background

The transformer is generally provided with a heat dissipation system, such as an SF11-25000/110 transformer of Zhengtai electric corporation selected from a main transformer of a ferri-chuan bridge hydropower station, and a heat dissipation sheet is arranged on one side of the transformer for heat dissipation. However, the iron-river bridge hydropower station is located in a low-altitude valley region, the temperature of the summer site is hot, the temperature of a main transformer iron core is as high as 95 ℃, a fan is additionally arranged on a main transformer radiator in 2019, the heat dissipation is improved, the temperature of the unit is still too high when the unit is fully loaded, and the temperature of the main transformer can only be temporarily reduced by a main transformer water spraying method. However, the main transformer water spraying not only has great potential safety hazard, but also causes the surface of the main transformer to have surface dirt for a long time due to water stain.

In order to ensure that the running temperature of the main transformer is in a reasonable range under the condition of full load in summer, a heat dissipation system is required to be additionally arranged. Referring to a mature structure of a transformer using oil external circulation in the current market, a tee joint and a valve can be additionally arranged from a main transformer oil outlet, transformer oil is pumped out through a circulating oil pump and then is cooled through an external cooling device and then is pumped into a transformer oil return port, the estimated technical improvement cost is 30 ten thousand per unit, the technical improvement cost needs to be improved in a complete halt state, a transformer hanging core is welded with a pipeline on a body again, and the improvement period is long. And once the circulating oil pump or the pipeline leaks, the potential safety hazard to the hydropower station is large.

Therefore, it is desirable to design a heat dissipation system with simple and reliable structure, high safety factor and low cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an improved generation cooling system for power station transformer solves the problem that there is the potential safety hazard in current unilateral heat dissipation transformer heat-sinking capability not enough, the outer circulation cost high cycle length of additional oil.

In order to solve the technical problem, the utility model adopts the following technical scheme: an improved heat dissipation system for a hydropower station transformer, characterized in that: the transformer tail water heat exchange system comprises a heat dissipation device, a main water inlet pipe, a main water return pipe and a tail water heat exchange system, wherein the heat dissipation device is composed of a plurality of heat dissipation pipes attached to the surface of the transformer, one end of each heat dissipation pipe is communicated with the main water inlet pipe, and the other end of each heat dissipation pipe is communicated with the main water return pipe; the tail water heat exchange system is arranged in tail water of the hydropower station, a water outlet of the tail water heat exchange system is connected with a water inlet of the water pump through the first control valve, a water outlet of the water pump is communicated with the main water inlet pipe through the second control valve, and a water inlet of the tail water heat exchange system is communicated with the main water return pipe.

The further technical proposal is that the main water return pipe is connected with a high-level water replenishing tank through a third control valve.

A further technical scheme is that a pipeline filter and a flow sensor are sequentially arranged at the water inlet of the water pump.

The further technical scheme is that the radiating pipe is a D-shaped pipe and is formed by encircling a plane and an arc-shaped surface, wherein the plane is adhered to the surface of the transformer through heat-conducting silicon adhesive, and a heat-insulating layer is arranged outside the arc-shaped surface.

The further technical proposal is that the highest point of the main water return pipe is connected with an exhaust valve.

The working principle is as follows: the cooled water flows through the heat dissipation pipe attached to the surface of the transformer, enters a tail water heat exchanger pipeline in tail water through the main water return pipe after exchanging heat with the transformer, takes away heat in water through flowing tail water to obtain cooled water, and is pumped into the heat dissipation pipe through the water pump again, so that the temperature of the transformer is reduced through circulation, and even in hot summer, the main transformer under full load does not break down due to overhigh temperature of the iron core.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a simple structure, simple to operate's improved generation cooling system of power station transformer, paste the cooling tube and establish on the transformer surface, cool off the transformer through water, water after the heat absorption obtains cooling with the tail water heat transfer in tail water heat transfer system's pipeline, the transformer cooling in the recirculation cooling tube, the rectification cycle is short and with low costs, need not to reform transform transformer own structure, the rectification degree of difficulty is low, the tail water has been utilized and has been cooled off, the make full use of resource, the environmental protection is high-efficient.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of the middle heat dissipating pipe of the present invention.

In the figure: 1-radiating pipe, 2-main water inlet pipe, 3-main water return pipe, 4-tail water heat exchange system, 5-first control valve, 6-water pump, 7-second control valve, 8-third control valve, 9-high level water tank, 10-pipeline filter, 11-flow sensor, 12-exhaust valve and 13-tail water platform.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 shows an improved heat dissipation system for a transformer of a hydropower station, characterized in that: comprises a heat radiator, a main water inlet pipe 2, a main water return pipe 3 and a tail water heat exchange system 4.

The heat dissipation device is composed of a plurality of heat dissipation pipes 1 attached to the surface of the transformer. In order to increase the heat exchange area of the pipeline, as shown in fig. 2, the heat dissipation pipe 1 is a D-shaped pipe and is surrounded by a plane and an arc-shaped surface, wherein the plane is adhered to the surface of the transformer through a heat conduction silicon adhesive, and a heat insulation layer is arranged outside the arc-shaped surface. Therefore, when water passes through the radiating pipe 1, the water can exchange heat with the transformer to the maximum extent through the bottom plane, and the heat insulation layer of the arc-shaped surface can prevent the water from absorbing heat from the external environment.

The top of the radiating tube 1 is communicated with one end of a main water return pipe 3 through a pipeline, and the other end of the main water return pipe 3 is connected with a water inlet of a tail water heat exchange system 4 arranged in tail water. The highest point of the main water return pipe 3 is connected with an exhaust valve 12.

The tail water heat exchange system 4 can be formed by connecting water pipes as shown in the figure, and can also be a heat exchanger in other shapes or forms. The water outlet of the tail water heat exchange system 4 is sequentially connected with the water inlets of the pipeline filter 10, the flow sensor 11 and the water pump 6 through the first control valve 5. Components such as the water pump 6 can be arranged on the tail water platform 13. Pipeline filter 10 filters water, avoids aquatic impurity to influence the operation of water pump 6, and flow sensor 11 sign water pipe normal water flow size in, in time moisturizing when discharge undersize avoids water pump 6 idle running.

The water outlet of the water pump 6 is communicated with one end of the main water inlet pipe 2 through the second control valve 7, and the other end of the main water inlet pipe 2 is connected with the bottom of the radiating pipe 1. The main water return pipe 3 is connected with a high-level water replenishing tank 9 through a third control valve 8. The high-temperature water replenishing tank 9 replenishes water when the water amount in the heat dissipation system is too small.

The rivers after the cooling are established in cooling tube 1 on transformer surface through pasting, and in getting into the tail water heat transfer system 4's of tail water in the tail water pipeline through main wet return 3 after with the transformer heat transfer, take away aquatic heat through the tail water that flows, obtain the water after the cooling, pump 6 once more through this circulation realize the cooling to the transformer in cooling tube 1, even if in hot summer, the main change under the full load also does not break down because of the iron core high temperature.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More particularly, various variations and modifications are possible in the component parts and/or arrangements within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. An improved heat dissipation system for a hydropower station transformer, characterized in that: the transformer tail water heat exchanger comprises a heat dissipation device, a main water inlet pipe (2), a main water return pipe (3) and a tail water heat exchange system (4), wherein the heat dissipation device is composed of a plurality of heat dissipation pipes (1) attached to the surface of a transformer, one end of each heat dissipation pipe (1) is communicated with the main water inlet pipe (2), and the other end of each heat dissipation pipe is communicated with the main water return pipe (3); the tail water heat exchange system (4) is arranged in tail water of the hydropower station, a water outlet of the tail water heat exchange system (4) is connected with a water inlet of a water pump (6) through a first control valve (5), a water outlet of the water pump (6) is communicated with a main water inlet pipe (2) through a second control valve (7), and a water inlet of the tail water heat exchange system (4) is communicated with a main water return pipe (3).

2. An improved heat dissipation system for a hydroelectric power station transformer as defined in claim 1, wherein: the main water return pipe (3) is connected with a high-level water replenishing tank (9) through a third control valve (8).

3. An improved heat dissipation system for a hydroelectric power station transformer as defined in claim 1, wherein: the water inlet of the water pump (6) is sequentially provided with a pipeline filter (10) and a flow sensor (11).

4. An improved heat dissipation system for a hydroelectric power station transformer as defined in claim 1, wherein: the radiating pipe (1) is a D-shaped pipe and is formed by encircling a plane and an arc-shaped surface, wherein the plane is adhered to the surface of the transformer through heat-conducting silicon adhesive, and a heat-insulating layer is arranged outside the arc-shaped surface.

5. An improved heat dissipation system for a hydroelectric power station transformer as defined in claim 1, wherein: the highest point of the main water return pipe (3) is connected with an exhaust valve (12).