CN204720858U - Underground substation - Google Patents

Abstract

The utility model provides an underground substation solves the technical problem that current underground substation's cooling system radiating effect is poor, easy scale deposit corrodes. The cooling system comprises an oil immersed transformer and a cooling system, wherein the oil immersed transformer comprises an oil tank oil pump; the cooling system comprises a box body, a water tank and a circulating water pump; a fan, an air heat exchange type heat exchanger, a spraying device and a water evaporation type heat exchanger are sequentially fixed in the box body from top to bottom, the water tank is positioned below the box body, a refrigerant outlet of the air heat exchange type heat exchanger is arranged on the air heat exchange type heat exchanger and is connected with an inlet of the water evaporation type heat exchanger through an oil pipe, water sprayed out of the spraying device faces the water evaporation type heat exchanger, and the water tank is connected with the spraying device through a circulating water pump; the oil tank is connected with a refrigerant inlet of the air heat exchange type heat exchanger through an oil pump, and an outlet of the water evaporation type heat exchanger is connected with the oil tank. The utility model discloses the water consumption is few, does not have scale deposit corrosion problems. The heat dissipation efficiency is high.

Description

Underground substation

technical field

The utility model belongs to the field of substations, specifically an underground substation.

Background technique

The oil-immersed transformer in the existing underground substation system is connected to the cooling system. At present, the cooling system is generally divided into air heat exchange type, water cooling type and water evaporation type. The former is simple and durable, but the heat dissipation effect is poor; the latter two heat dissipation The effect is better, but the water-cooled type consumes a lot of water. Although the evaporative type consumes less water, the contact reaction between the high-temperature pipeline and water causes serious fouling on the surface of some parts of the body. Long-term use is easy to corrode, which affects the heat dissipation effect.

Contents of the invention

The purpose of the utility model is to provide an underground substation to solve the technical problems of poor heat dissipation and easy scaling and corrosion of the cooling system of the existing underground substation.

The technical solution of the utility model is:

An underground substation, including an underground oil-immersed transformer and a cooling system, is special in that:

The oil-immersed transformer includes an oil tank, and an oil pump is arranged on the oil tank;

The cooling system includes a box with upper and lower openings, a water tank and a circulating water pump; a fan, an air heat exchange heat exchanger, a spraying device, and a water evaporation heat exchanger are fixed in sequence from top to bottom in the box, and the water tank is located in the Below the box body, the air heat exchange heat exchanger is provided with a refrigerant inlet and a refrigerant outlet, the position of the refrigerant inlet is higher than the refrigerant outlet, and the refrigerant of the air heat exchange heat exchanger The outlet is connected to the inlet of the water evaporative heat exchanger through the oil pipe, the water sprayed by the spraying device is directed towards the water evaporative heat exchanger, and the water tank is connected to the spraying device through a circulating water pump;

The oil tank is connected with the refrigerant inlet of the air heat exchange heat exchanger through an oil pump, and the outlet of the water evaporative heat exchanger is connected with the oil tank.

The box body extends from underground to the ground, and a rain shield is arranged above the box body.

The oil-immersed transformer and the box body are not on the same vertical plane.

The number of the above-mentioned fans is one or more, and the plurality of fans are evenly distributed on the same horizontal plane.

There are two above-mentioned air heat exchange heat exchangers, which are evenly distributed on the same horizontal plane.

The beneficial effects of the utility model are:

(1) This utility model directly introduces the high-temperature oil in the oil-immersed transformer into the air-air heat exchange heat exchanger for primary heat dissipation, and then conducts secondary heat dissipation through the water evaporation heat exchanger. The heat dissipation efficiency is high, and it is suitable for underground without ventilation environment of.

(2) Less water consumption, no scaling and corrosion problems.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Among them: 1. Fan 2. Air heat exchange heat exchanger 3. Sprinkler device 4. Water evaporative heat exchanger 5. Circulating water pump 6. Water tank 7. Oil tank 8. Oil pump 9. Tank.

Detailed ways

The structure of the utility model underground substation is described below in conjunction with FIG. 1 .

As shown in Figure 1, an underground substation includes an underground oil-immersed transformer and a cooling system.

The oil-immersed transformer includes an oil tank 7 on which an oil pump 8 is arranged.

The cooling system includes a box body 9 with upper and lower openings, a water tank 6 and a circulating water pump 5; a fan 1, an air heat exchange heat exchanger 2, a spray device 3, and a water evaporation heat exchange unit are fixed in sequence from top to bottom in the box body. 4, the water tank is located below the tank, the air heat exchange heat exchanger is provided with a refrigerant inlet and a refrigerant outlet, the position of the refrigerant inlet is higher than the refrigerant outlet, and the air heat exchange The refrigerant outlet of the type heat exchanger is connected to the inlet of the water evaporative heat exchanger through the oil pipe, the water sprayed by the spray device is directed towards the water evaporative heat exchanger, and the water tank is connected to the spray device through a circulating water pump;

The oil tank is connected with the refrigerant inlet of the air heat exchange heat exchanger through an oil pump, and the outlet of the water evaporative heat exchanger is connected with the oil tank.

The box body extends from the ground to the ground, which is convenient for heat export; the top of the box body is provided with a rain shield to prevent rainwater from intruding into the underground substation.

The oil-immersed transformer and the box body are not on the same vertical plane, so as to prevent the water sprayed from the spraying device from splashing on the oil-immersed transformer and causing danger.

The number of the above-mentioned fans is one or more, and the plurality of fans are evenly distributed on the same horizontal plane.

There are two above-mentioned air heat exchange heat exchangers, which are evenly distributed on the same horizontal plane.

The high-temperature transformer oil from the oil tank of the oil-immersed transformer first enters the air heat exchange heat exchanger 2 from the refrigerant inlet. The air flow is brought into the air to realize the first stage of heat dissipation; after the first stage of heat dissipation, the transformer oil, which is no longer high temperature, enters the water evaporative heat exchanger 4; Under the action, water is sprayed from the spray device 3 to the water evaporative heat exchanger 4, and the heat is absorbed through the evaporation of water to realize the second stage of heat dissipation; the transformer oil after the second stage of heat dissipation is returned to the oil tank from the refrigerant outlet 8.

Claims (3)

1. underground substation, comprises the oil-immersed type transformer and cooling system that are positioned at underground, it is characterized in that: described oil-immersed type transformer comprises fuel tank, and fuel tank is provided with oil pump;

Described cooling system comprises the casing of upper and lower opening, water tank and circulating water pump; Blower fan, air heat exchange formula heat exchanger, spray equipment, evaporation type heat exchanger is fixed with from top to bottom successively in casing, described water tank is positioned at the below of casing, described air heat exchange formula heat exchanger is provided with refrigerant inlet and refrigerant outlet, the position of described refrigerant inlet is higher than refrigerant outlet, the refrigerant outlet of described air heat exchange formula heat exchanger is connected by the entrance of oil pipe with evaporation type heat exchanger, the water of spray equipment ejection is towards evaporation type heat exchanger, and water tank is connected with spray equipment by circulating water pump;

Described fuel tank is connected by the refrigerant inlet of oil pump with air heat exchange formula heat exchanger, and the outlet of evaporation type heat exchanger is connected with fuel tank.

2. underground substation according to claim 1, is characterized in that: described casing extends to from underground on the ground, and the top of described casing is provided with weather shield.

3. underground substation according to claim 1 and 2, is characterized in that: described oil-immersed type transformer and casing be not on same vertical plane.