CN218333369U

CN218333369U - Open-type dry-type transformer cooling and moisture-removing drying device

Info

Publication number: CN218333369U
Application number: CN202222619723.2U
Authority: CN
Inventors: 戴松柏; 曾嘉雯; 聂冰涛; 李浩冉
Original assignee: Huaneng Jingmen Thermal Power Co Ltd
Current assignee: Huaneng Jingmen Thermal Power Co Ltd
Priority date: 2022-10-07
Filing date: 2022-10-07
Publication date: 2023-01-17
Anticipated expiration: 2032-10-07

Abstract

Open-type dry-type transformer cooling and damp-removing drying device. When the dry type transformer equipment runs, moisture can be dispersed due to self heating loss, and when the dry type transformer equipment is stopped for a long time and needs to be started, the insulation measurement of the equipment is unqualified due to the intrusion of water vapor in the environment or the influence of rain weather. The utility model discloses the constitution includes: the transformer comprises a dry-type transformer housing (2) and three groups of dry-type transformer coils (1), wherein an air collecting chamber (7) is fixed on the front side surface of the dry-type transformer housing, one end of the air collecting chamber is fixed with a cooling fan (5), and three air outlet pipes (6) are arranged on the air collecting chamber and respectively correspond to the three groups of dry-type transformer coils; and a heater (8) is fixed in the air collecting chamber. The utility model is used for dry-type transformer cooling and damp drying.

Description

Open-type dry-type transformer cooling and moisture-removing drying device

The technical field is as follows:

the utility model relates to an open-type dry-type transformer cooling and damp-proof drying device.

Background art:

at present, the open-type dry-type transformer is mainly suitable for dry and clean rooms (when the ambient temperature is 20 ℃, the relative humidity is not more than 85%), and the open-type dry-type transformer needs to be prevented from being subjected to rainwater, moisture, high temperature, high heat or direct sunshine in use; its ware body and atmosphere direct contact have two kinds of cooling methods of air self-cooling and forced air cooling generally, and forced air cooling device mainly uses cross-flow cooling blower to cool off, installs inside the transformer, and unable the change during the trouble in service influences the heat dissipation, through designing transformer cooling air duct, moves cooling blower to the transformer outside, does not influence the use during the trouble. Meanwhile, if the open-type transformer is used in a wider room, the environment is severe, such as heavy moisture in the indoor environment in daily or rainy weather, when the equipment is stopped for a long time, the insulation is reduced due to the fact that the equipment is easily affected with moisture, and meanwhile, the dust particles in the external environment are more, and the insulation is reduced due to the fact that the dust particles are adsorbed on the dry-type transformer and easily absorb moisture; open-type dry-type transformer does not all design and drives damp drying device, and it is relatively poor to use the dry-type to become to take cooling blower to drive damp effect certainly, when ambient humidity is higher, probably insulating blow lower more, influence equipment use (for example my factory excitation becomes, install in steam turbine room 6 meters department, half fretwork (install on grid plate) of transformer lower part, 0 meters of steam turbine room is more, when dry-type transformer equipment moves, because self heating loss can drive away moisture, when dry-type transformer equipment stops the operation for a long time and need start, because the steam invade in the environment of locating, or the influence of rainwater weather, lead to equipment insulation measurement unqualified.

The utility model has the following contents:

the utility model aims at providing an open-type dry-type transformer cooling and damp drying device that drives in order to remedy prior art not enough.

The above purpose is realized by the following technical scheme:

an open-type dry-type transformer cooling and moisture-removing drying device comprises: the air-cooling type transformer comprises a dry-type transformer outer cover and three groups of dry-type transformer coils, wherein an air collecting chamber is fixed on the front side surface of the dry-type transformer outer cover, one end of the air collecting chamber is fixed with a cooling fan, and three air outlet pipes are arranged on the air collecting chamber and respectively correspond to the three groups of dry-type transformer coils;

and a heater is fixed in the air collecting chamber.

The open-type dry-type transformer cooling and moisture-removing drying device is characterized in that a temperature sensor and an air speed flow sensor are respectively arranged on each air outlet pipe.

Has the beneficial effects that:

1. when the transformer of the utility model is in normal operation, the heater is not operated, the self-loss heat can ensure that the transformer is not affected with damp, and when the temperature of the transformer core and the winding exceeds a set value, the cooling fan is started to cool (when the temperature signal of the transformer core and the winding is transmitted to the PLC control loop, and the temperature is over-high, the cooling fan is automatically started, and after the temperature is reduced to a certain value, the cooling fan is automatically closed); the three outlets of the cooling air duct are respectively provided with an air speed and flow rate detection probe, air quantity information is transmitted to a PLC control loop, and if the air quantity is too small, the air quantity of an air outlet can be adjusted by adjusting an air quantity regulator through the PLC so as to meet the requirement of cooling air quantity;

2. the utility model adopts the spiral electric heating wire which is arranged at the air collecting chamber, the cooling fan blows air to the heater, the air uniformly passes through the spiral electric heating wire, and the heat generated after the electric heating wire is electrified exchanges heat with the passing cold air, thereby increasing the air temperature of the air outlet and drying the transformer; three air outlet department respectively sets up a temperature sensor, in time feeds back the air-out temperature that detects to PLC control circuit, and whether PLC control circuit control heater worked sets up the overtemperature protection, prevents that the wind temperature is too high, damages the transformer insulation.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

in the figure: 1. a dry-type transformer coil; 2. a dry-type transformer housing; 3. a temperature sensor; 4. a wind speed flow sensor; 5. a cooling fan; 6. an air outlet pipe; 7. an air collection chamber; 8. a heater.

The specific implementation mode is as follows:

referring to fig. 1, an open-type dry transformer cooling and moisture-removing drying device comprises: the transformer comprises a dry-type transformer housing 2 and three groups of dry-type transformer coils 1, wherein an air collection chamber 7 is fixed on the front side surface of the dry-type transformer housing, one end of the air collection chamber is fixed with a cooling fan 5, three air outlet pipes 6 are arranged on the air collection chamber and respectively correspond to the three groups of dry-type transformer coils, the air collection chamber is made of insulating high-temperature-resistant materials, and an air inlet and three air outlets respectively correspond to air areas cooled by the original three cross-flow cooling fans;

and a heater 8 is fixed in the air collecting chamber.

The heater adopts the heliciform heating wire, and it is installed in cooling blower air outlet department, and cooling blower blows air to heater department, and even heliciform heating wire that passes through carries out the heat exchange with the cold air that passes through by the heat that the heating wire produced after circular telegram to make the wind temperature of air outlet rise, carry out dry transformer.

In the open-type dry-type transformer cooling and moisture-removing drying device, each air outlet pipe is respectively provided with a temperature sensor 3 and a wind speed flow sensor 4.

When the temperature of the transformer core and the winding exceeds a set value, a cooling fan is started to cool (the temperature signals of the transformer core and the winding are transmitted to a PLC control loop, when the temperature is too high, the cooling fan is automatically started, and after the temperature is reduced to a certain value, the cooling fan is automatically closed); the three outlets of the cooling air duct are respectively provided with a wind speed and flow rate detection probe, the wind rate information is transmitted to a PLC control loop, if the wind rate is too small, the wind rate of the air outlet can be adjusted by adjusting a wind rate regulator through the PLC, the wind rate regulator is a regulator matched with a cooling fan, and the detailed description is not provided herein, so that the wind rate requirement of the cooling fan is met;

the heater adopts a spiral electric heating wire and is arranged at the air outlet of the cooling fan, the cooling fan blows air to the heater and uniformly passes through the spiral electric heating wire, and heat generated after the electric heating wire is electrified exchanges heat with cold air passing through the spiral electric heating wire, so that the air temperature of the air outlet is increased, and the transformer is dried; three air outlet department respectively sets up a K type thermocouple, in time feeds back the air-out temperature that detects to PLC control circuit, and PLC control circuit sets up the overtemperature protection through controlling solid state relay and then whether work of control heater, prevents that the wind temperature is too high, and it is insulating to damage the transformer. Meanwhile, the ventilator can utilize the air volume regulator to regulate the air volume of the blown air, so that the regulation and control of the working temperature and the air volume are realized.

Claims

1. An open-type dry-type transformer cooling and moisture-removing drying device comprises: the dry-type transformer comprises a dry-type transformer outer cover and three groups of dry-type transformer coils, and is characterized in that: an air collecting chamber is fixed on the front side surface of the dry type transformer housing, one end of the air collecting chamber is fixed with a cooling fan, and three air outlet pipes are arranged on the air collecting chamber and respectively correspond to the three groups of dry type transformer coils;

and a heater is fixed in the air collecting chamber.

2. The cooling and dehumidifying and drying device for open-type dry-type transformer according to claim 1, wherein: and each air outlet pipe is provided with a temperature sensor and an air speed flow sensor respectively.