CN112466625A - Oil-immersed transformer and automatic cooling device thereof - Google Patents
Oil-immersed transformer and automatic cooling device thereof Download PDFInfo
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- CN112466625A CN112466625A CN202011204482.4A CN202011204482A CN112466625A CN 112466625 A CN112466625 A CN 112466625A CN 202011204482 A CN202011204482 A CN 202011204482A CN 112466625 A CN112466625 A CN 112466625A
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- 238000001816 cooling Methods 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 135
- 238000005507 spraying Methods 0.000 claims abstract description 27
- 239000007921 spray Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 230000005855 radiation Effects 0.000 claims abstract description 3
- 238000012544 monitoring process Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 102100026788 ATP synthase subunit C lysine N-methyltransferase Human genes 0.000 claims description 5
- 101000833848 Homo sapiens ATP synthase subunit C lysine N-methyltransferase Proteins 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000003595 mist Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/16—Water cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/20—Cooling by special gases or non-ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transformer Cooling (AREA)
Abstract
The invention provides an oil-immersed transformer and an automatic cooling device thereof, which both comprise an electrical control module, an electric control spraying device, a cooling fan, a temperature controller WK and a fin radiator arranged on the oil-immersed transformer; the electric control spraying device comprises a water inlet pipe, a spraying pipe, an electric water pump and a water tank, wherein the water tank is arranged on the water inlet pipe, a low liquid level switch JS is arranged in the water tank, the water inlet pipe is connected with a water inlet of the spraying pipe through the electric water pump, and a spray head is arranged on a pipeline at the tail end of the spraying pipe; the heat radiation fan is arranged below the fin radiator; for the electrical control module: the electric water pump control circuit comprises a first contactor KM1, a normally closed contact JS-1 of a low liquid level switch JS and a high temperature control contact WK-1; the electric water pump driving loop comprises a water pump motor and a first normally open contact KM1-1 of a first contactor KM 1; the fan control circuit comprises a fan driving motor M2 and a second normally open contact KM1-2 of a first contactor KM 1. The scheme is used for improving the heat dissipation efficiency of the radiator of the oil-immersed transformer.
Description
Technical Field
The invention relates to the field of transformer cooling, in particular to an oil-immersed transformer and an automatic cooling device thereof.
Background
Transformers are important power supply equipment in power systems. An oil-immersed transformer is a common transformer in a power system, and mainly functions to convert high voltage into low voltage and transfer electric energy.
Oil-immersed transformers include transformers that generate a lot of heat during operation, and usually have a finned heat sink disposed on the transformer body. The heat generated by the oil-immersed transformer in the operation process can be generally radiated by transformer oil under the action of natural wind or a fan by virtue of a fin radiator integrated on the transformer body.
However, the heat energy of the radiator is taken away through air flow (natural wind), so that the oil temperature is reduced, the purpose of transformer heat dissipation can be achieved, the heat dissipation condition of the transformer is still not optimistic even if a fan is additionally arranged under the condition of high temperature and heavy load in summer, a plurality of transformers have high temperature in the operation process, and the operation and maintenance workload of power workers is greatly increased.
Therefore, the invention provides an oil-immersed transformer and an automatic cooling device thereof, which are used for solving the problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an oil-immersed transformer and an automatic cooling device thereof, which are used for improving the heat dissipation efficiency of the oil-immersed transformer.
In a first aspect, the invention provides an automatic cooling device for an oil-immersed transformer, which comprises a fin radiator arranged on the oil-immersed transformer, wherein fins of the fin radiator are vertically distributed;
the electric control spraying device comprises a water inlet pipe, a spraying pipe, an electric water pump and a water tank, wherein the water tank is arranged on the water inlet pipe, a low liquid level switch JS is arranged in the water tank, the water outlet of the water inlet pipe is connected with the water inlet of the electric water pump, the water outlet of the electric water pump is connected with the water inlet of the spraying pipe, and a spray head for spraying cooling water to the fins of the fin radiator is arranged on a pipeline at the tail end of the spraying pipe;
the heat radiation fan is arranged below the fin radiator;
the electric control module comprises an electric water pump driving circuit, an electric water pump control circuit and a fan control circuit;
the electric water pump control circuit comprises a first direct-current power supply, a first contactor KM1, a normally closed contact JS-1 of a low liquid level switch JS and a high-temperature control contact WK-1 of a temperature controller WK, wherein the first contactor KM1, the normally closed contact JS-1 and the high-temperature control contact WK-1 are connected with the power output end of the first direct-current power supply in series;
the electric water pump driving loop comprises a first alternating current power supply, a water pump motor of the electric water pump and a first normally open contact KM1-1 of a first contactor KM1, wherein the water pump motor and the first normally open contact KM1-1 are connected in series on the first alternating current power supply;
the fan control circuit comprises a second alternating current power supply, a fan driving motor M2 of the cooling fan and a second normally open contact KM1-2 of the first contactor KM1, and the fan driving motor M2 and the second normally open contact KM1-2 are connected in series on the second alternating current power supply.
Further, an air switch Q1 is also connected in series on the electric water pump driving circuit, and the air switch Q1 is provided with a normally closed contact Q1';
the electrical control module further comprises a fault indication circuit;
the fault indication circuit comprises a first branch circuit, wherein the first branch circuit comprises a first alternating current power supply fault indication lamp L1 and a normally closed contact Q1 'of an air switch Q1, and the first alternating current power supply fault indication lamp L1 and the normally closed contact Q1' are connected in series.
Further, a second contactor KM2 is also connected in series on the electric water pump driving loop;
the fault indication circuit further comprises a second branch circuit which is arranged in parallel with the first branch circuit and comprises a device operation fault indicator lamp L4 and a normally open contact KM2-1 of a second contactor KM2, and the device operation fault indicator lamp L4 is connected with the normally open contact KM2-1 in series.
Further, the fault indication circuit further comprises a third branch circuit connected with the first branch circuit in parallel, and a water inlet fault indication lamp L2 and a normally closed contact JS-2 of the low liquid level switch JS are connected in series in the third branch circuit.
Furthermore, the fault indication circuit also comprises a fourth branch circuit which is connected with the first branch circuit in parallel, and a transformer oil temperature high alarm indicator lamp L3 and a high temperature control contact WK-2 of the temperature controller WK are connected in series in the fourth branch circuit.
Furthermore, the automatic cooling device for the oil-immersed transformer also comprises an operation monitoring system, wherein the operation monitoring system is used for monitoring the operation state of the automatic cooling device for the oil-immersed transformer; the operation monitoring system is provided with a wireless transmission module and is also used for uploading monitored operation states to operation and maintenance staff in real time through the wireless transmission module.
Further, the wireless transmission module adopts a GPRS module, a 4G communication module or a 5G communication module.
In a second aspect, the invention provides an oil-immersed transformer, which comprises a transformer body, wherein the transformer body is provided with the automatic temperature reduction device for the oil-immersed transformer in the above aspects.
The beneficial effect of the invention is that,
when the oil-immersed transformer and the automatic cooling device thereof are used, water mist sprayed by a spray head on the electric control spray device can be used for radiating a fin radiator of the oil-immersed transformer, and the water mist can be blown by the cooling fan at the bottom of the radiator to move upwards, so that wet and cold air flow is formed for radiating the radiator, and the improvement of the cooling efficiency of the radiator of the oil-immersed transformer is facilitated to a certain extent.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an automatic cooling device for an oil-immersed transformer according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of one embodiment of the electric water pump control circuit of the present invention.
FIG. 3 is a schematic circuit diagram of one embodiment of an electric water pump drive circuit as described in the present invention.
Fig. 4 is a schematic circuit diagram of one embodiment of the fault indication circuit of the present invention.
Fig. 5 is an assembly schematic diagram of the automatic cooling device for the oil-immersed transformer, which is provided by the invention, assembled on the oil-immersed transformer.
FIG. 6 is a schematic circuit diagram of one embodiment of a fan control circuit of the present invention.
Wherein: 1. the water level control device comprises a water inlet pipe, 2, a water tank, 3, a low liquid level switch JS, 4, an electric water pump, 5, a spray pipe, 6, a heat dissipation fan, 7, a spray head, 8, a fin radiator, 9, fins, 10, a transformer body, 11 and a temperature controller WK.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1-6 show an embodiment of an automatic cooling device for an oil-immersed transformer according to the invention.
As shown in fig. 1-4 and 6, the automatic cooling device for an oil-immersed transformer includes a fin radiator 8 mounted on the oil-immersed transformer (i.e., the oil-immersed transformer to be cooled), and fins of the fin radiator 8 are vertically distributed. The automatic cooling device of the oil-immersed transformer further comprises an electrical control module, an electric control spraying device, a cooling fan 6 and a temperature controller WK, wherein the cooling fan 6 is used for blowing air from the lower part of the fins 9 of the fin radiator 8 to gaps among the fins 9, and the temperature controller WK is used for detecting the oil temperature of transformer oil in the oil-immersed transformer.
As shown in fig. 1, the electric control spraying device comprises a water inlet pipe 1, a spraying pipe 5, an electric water pump 4 and a water tank 2, wherein the water tank 2 is installed on the water inlet pipe 1, a low liquid level switch JS is installed in the water tank 2, a water outlet of the water inlet pipe 1 is connected with a water inlet of the electric water pump 4, a water outlet of the electric water pump 4 is connected with a water inlet of the spraying pipe 5, and a spray head 7 used for spraying cooling water to fins of a fin radiator 8 is installed on a tail end pipeline of the spraying pipe 5.
When the cooling device is used, as shown in fig. 5, tap water can be connected into the water inlet pipe 1, water is injected into the water tank 2 through the water inlet pipe 1, the electric water pump 4 is started, water in the water tank 2 is pumped into the spray pipe 5 through the electric water pump 4, and then the water is sprayed onto the fins of the fin radiator 8 through the spray head 7 on the spray pipe 5, so that heat is dissipated for the fin radiator 8.
The number of the nozzles 7 on the shower pipe 5 and the spraying direction of each nozzle 7 can be set by those skilled in the art according to actual conditions. For example, four nozzles may be provided, the four nozzles are sequentially distributed and equally divided into two groups, for example, the group a and the group B, two nozzles are provided in the group a and the group B, two nozzles in the group a and two nozzles in the group B are alternately provided, two nozzles in the group a are used for spraying the first surface of each fin on the fin heat sink 8, and two nozzles in the group B are used for spraying the other surface of each fin on the fin heat sink 8. In this embodiment, the port of the spray pipe 5 far from the water inlet of the spray pipe 5 is a blind end.
In this embodiment, the electric control module includes an electric water pump driving circuit, an electric water pump control circuit, and a fan control circuit.
Referring to fig. 2, the electric water pump control circuit comprises a first direct current power supply, a first contactor KM1, a normally closed contact JS-1 of a low liquid level switch JS and a high temperature control contact WK-1 of a temperature controller WK, wherein the first contactor KM1, the normally closed contact JS-1 and the high temperature control contact WK-1 are connected in series at the power output end of the first direct current power supply.
The normally closed contact JS-1 of the low level switch JS is automatically closed when the actual water level in the water tank 2 is higher than the preset low level. When the temperature controller WK monitors that the oil temperature of the transformer oil reaches a preset high-temperature threshold (for example, 65 ℃), a high-temperature control contact WK-1 of the temperature controller WK is closed.
When the electric water pump is used, when the actual water level in the water tank 2 is higher than the preset low water level and the temperature controller WK monitors that the oil temperature of the transformer oil reaches the preset high temperature threshold value, the normally closed contact JS-1 and the high temperature control contact WK-1 in the electric water pump control circuit are both closed and conducted, and therefore the first contactor KM1 is controlled to be powered on to work.
As shown in FIG. 3, the electric water pump driving circuit comprises a first alternating current power supply, a water pump motor M1 of the electric water pump 4 and a first normally open contact KM1-1 of a first contactor KM1, wherein the water pump motor M1 and the first normally open contact KM1-1 are connected in series with the first alternating current power supply.
During the use, after first contactor KM1 got the electricity at electronic water pump control circuit control, first normally open contact KM1-1 of first contactor KM1 was closed to the switch-on electric water pump drive return circuit, water pump motor 4 got electric work, thereby drive electric water pump 4 takes out the water in the water tank 2 and intakes shower 5, then through shower 5 upper nozzle spray fin radiator 8's fin, thereby reach for the radiating purpose of fin radiator 8. The whole spraying process is carried out automatically, the actual water level in the water tank 2 is higher than the preset low water level, and when the temperature controller WK monitors that the oil temperature of the transformer oil reaches the preset high temperature threshold value and is established at the same time, the spraying is controlled automatically, and the water saving is facilitated to a certain extent.
As shown in fig. 6, in the present embodiment, the fan control circuit includes a second ac power supply, a fan drive motor M2 of the cooling fan 6, and a second normally open contact KM1-2 of the first contactor KM1, and the fan drive motor M2 and the second normally open contact KM1-2 are connected in series to the second ac power supply. For increasing the use safety, an air switch Q2 can be connected in series at the output end of the second alternating current power supply, and then the fan driving motor M2 and the second normally open contact KM1-2 are connected in series. When the fan control circuit is put into use, the air switch Q2 is closed firstly.
The first alternating current power supply and the second alternating current power supply are both 220V alternating current power supplies, and the first direct current power supply can be a 220V direct current power supply.
In the present embodiment, the heat dissipation fan 6 is installed below the fin radiator 8, and the air outlet of the heat dissipation fan 6 faces the fins of the fin radiator 8. The number of the heat dissipation fans 6 can be selected by those skilled in the art according to the actual number of the fins on the fin radiator 8, for example, four heat dissipation fans 6 can be provided. In a specific implementation, referring to fig. 6, a fan control circuit is separately provided for each cooling fan.
In the invention, when the water pump motor M1 of the water pump motor 4 is electrified to work, the fan driving motor M2 of the cooling fan 6 is electrified to work, so that when the electric control spraying device provided by the invention radiates the transformer radiator through sprayed water mist, the cooling fan 6 at the bottom of the radiator can blow the water mist to move upwards, thus wet and cold air flow is formed to radiate the radiator, and the radiating efficiency of the radiator of the oil-immersed transformer is improved to a certain extent.
Optionally, as an embodiment of the invention, an air switch Q1 is also connected in series to the electric water pump driving circuit, and the air switch Q1 is provided with a normally closed contact Q1'. In use, the air switch Q1 is closed. The automatic cooling device of the oil-immersed transformer further comprises a fault indication circuit. The fault indication circuit comprises a first branch circuit, wherein the first branch circuit comprises a first alternating current power supply fault indication lamp L1 and a normally closed contact Q1 'of an air switch Q1, and the first alternating current power supply fault indication lamp L1 and the normally closed contact Q1' are connected in series. When the device is put into use, the electric water pump driving loop can be electrified by closing the air switch Q1. When the air switch Q1 trips open, the normally closed contact Q1' of the air switch Q1 closes, and the first ac power failure indicator lamp L1 lights, thereby indicating a first ac power failure. When the air switch Q1 is turned on, the normally closed contact Q1' of the air switch Q1 is opened, and the first ac power failure indicator lamp L1 is not lit.
Optionally, as an embodiment of the invention, a second contactor KM2 is further connected in series on the electric water pump driving circuit; the fault indication circuit further comprises a second branch circuit which is arranged in parallel with the first branch circuit and comprises a device operation fault indicator lamp L4 and a normally open contact KM2-1 of a second contactor KM2, and the device operation fault indicator lamp L4 is connected with the normally open contact KM2-1 in series. When the electric water pump driving circuit has an open circuit fault, the second contactor KM2 loses power, the normally open contact KM2-1 of the second contactor KM2 is disconnected, and the device operation fault indicator lamp L4 goes out, so that the electric water pump driving circuit is indicated to have a fault. When the electric water pump driving circuit is connected, the second contactor KM2 is electrified, the normally open contact KM2-1 of the second contactor KM2 is closed, and the device operation fault indicator lamp L4 is lightened, so that the electric water pump driving circuit is indicated to work normally.
Optionally, as an embodiment of the present invention, the fault indication circuit further includes a third branch circuit disposed in parallel with the first branch circuit, and the third branch circuit is connected in series with a water inlet fault indicator L2 and a normally closed contact JS-2 of the low level switch JS. When the water level in the water tank 2 is higher than the preset low water level, the normally closed contact JS-2 of the low water level switch JS is closed, so that the water inlet fault indicator lamp L2 is lightened. When the level of the water in the water tank 2 is lowered to or below the preset low level, the normally closed contact JS-2 of the low level switch JS is opened, so that the water inlet failure indicator lamp L2 is turned off, thereby indicating a water inlet failure of the water tank 2.
Optionally, as an embodiment of the present invention, the fault indicating circuit further includes a fourth branch circuit disposed in parallel with the first branch circuit, and a transformer oil temperature high alarm indicator L3 and a high temperature control contact WK-2 of the temperature controller WK are connected in series in the fourth branch circuit. When the temperature controller WK detects that the oil temperature of the transformer oil reaches the preset high-temperature threshold value, a high-temperature control contact WK-2 of the temperature controller WK is closed, so that the fourth branch circuit is connected, and the transformer oil temperature high alarm indicator lamp L3 is turned on.
Optionally, as an embodiment of the present invention, the automatic cooling device for an oil-immersed transformer further includes an operation monitoring system, where the operation monitoring system is configured to monitor an operation state of the automatic cooling device for an oil-immersed transformer. The operation monitoring system is provided with a wireless transmission module and is also used for uploading monitored operation states to operation and maintenance staff in real time through the wireless transmission module.
Optionally, as an embodiment of the present invention, the wireless transmission module employs a GPRS module. For example, when the intelligent mobile phone is used, the operation monitoring system can upload each monitored operation state to a preset intelligent mobile phone of an operation and maintenance maintainer in real time through the wireless transmission module.
When the GPRS module is implemented, the GPRS module can be replaced by a 4G communication module or a 5G communication module.
The invention further provides an oil-immersed transformer, which comprises a transformer body 10, wherein the transformer body 10 is provided with the automatic cooling device for the oil-immersed transformer provided by the embodiment of the invention. Wherein the thermostat 11 is integrated at the upper end of the transformer body 10. The structure of the oil-filled transformer can be referred to fig. 5. The temperature controller WK and the fin radiator 8 are disposed at both sides of the transformer body 10.
The same and similar parts in the various embodiments in this specification may be referred to each other.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. An automatic cooling device of an oil-immersed transformer comprises a fin radiator arranged on the oil-immersed transformer, wherein fins of the fin radiator are vertically distributed;
the electric control spraying device comprises a water inlet pipe, a spraying pipe, an electric water pump and a water tank, wherein the water tank is arranged on the water inlet pipe, a low liquid level switch JS is arranged in the water tank, the water outlet of the water inlet pipe is connected with the water inlet of the electric water pump, the water outlet of the electric water pump is connected with the water inlet of the spraying pipe, and a spray head for spraying cooling water to the fins of the fin radiator is arranged on a pipeline at the tail end of the spraying pipe;
the heat radiation fan is arranged below the fin radiator;
the electric control module comprises an electric water pump driving circuit, an electric water pump control circuit and a fan control circuit;
the electric water pump control circuit comprises a first direct-current power supply, a first contactor KM1, a normally closed contact JS-1 of a low liquid level switch JS and a high-temperature control contact WK-1 of a temperature controller WK, wherein the first contactor KM1, the normally closed contact JS-1 and the high-temperature control contact WK-1 are connected with the power output end of the first direct-current power supply in series;
the electric water pump driving loop comprises a first alternating current power supply, a water pump motor of the electric water pump and a first normally open contact KM1-1 of a first contactor KM1, wherein the water pump motor and the first normally open contact KM1-1 are connected in series on the first alternating current power supply;
the fan control circuit comprises a second alternating current power supply, a fan driving motor M2 of the cooling fan and a second normally open contact KM1-2 of the first contactor KM1, and the fan driving motor M2 and the second normally open contact KM1-2 are connected in series on the second alternating current power supply.
2. The automatic temperature reduction device for the oil-immersed transformer according to claim 1, wherein an air switch Q1 is further connected in series on the electric water pump driving circuit, and the air switch Q1 is provided with a normally closed contact Q1';
the electrical control module further comprises a fault indication circuit;
the fault indication circuit comprises a first branch circuit, wherein the first branch circuit comprises a first alternating current power supply fault indication lamp L1 and a normally closed contact Q1 'of an air switch Q1, and the first alternating current power supply fault indication lamp L1 and the normally closed contact Q1' are connected in series.
3. The automatic temperature reduction device for the oil-immersed transformer according to claim 1 or 2, wherein a second contactor KM2 is further connected in series on the electric water pump driving loop;
the fault indication circuit further comprises a second branch circuit which is arranged in parallel with the first branch circuit and comprises a device operation fault indicator lamp L4 and a normally open contact KM2-1 of a second contactor KM2, and the device operation fault indicator lamp L4 is connected with the normally open contact KM2-1 in series.
4. The automatic temperature reduction device for oil-immersed transformers according to claim 3, wherein the fault indication circuit further comprises a third branch circuit connected in parallel with the first branch circuit, and a water inlet fault indication lamp L2 and a normally closed contact JS-2 of the low liquid level switch JS are connected in series in the third branch circuit.
5. The automatic temperature reduction device for oil-filled transformers according to claim 4, characterized in that the fault indication circuit further comprises a fourth branch circuit connected in parallel with the first branch circuit, and a transformer oil temperature high alarm indicator lamp L3 and a high temperature control contact point WK-2 of the temperature controller WK are connected in series in the fourth branch circuit.
6. The automatic oil-immersed transformer cooling device according to claim 1 or 2, further comprising an operation monitoring system for monitoring an operation state of the automatic oil-immersed transformer cooling device; the operation monitoring system is provided with a wireless transmission module and is also used for uploading monitored operation states to operation and maintenance staff in real time through the wireless transmission module.
7. The automatic oil-filled transformer cooling device according to claim 6, wherein the wireless transmission module is a GPRS module, a 4G communication module or a 5G communication module.
8. An oil-immersed transformer, which comprises a transformer body and is characterized in that the transformer body is provided with the automatic temperature reduction device of the oil-immersed transformer as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204482.4A CN112466625A (en) | 2020-11-02 | 2020-11-02 | Oil-immersed transformer and automatic cooling device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204482.4A CN112466625A (en) | 2020-11-02 | 2020-11-02 | Oil-immersed transformer and automatic cooling device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112466625A true CN112466625A (en) | 2021-03-09 |
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|---|---|---|---|
| CN202011204482.4A Pending CN112466625A (en) | 2020-11-02 | 2020-11-02 | Oil-immersed transformer and automatic cooling device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102490351B1 (en) * | 2022-05-27 | 2023-01-20 | 더원엔지니어링 주식회사 | Transformer with cooling function for substations of 154KV or higher |
| KR102490352B1 (en) * | 2022-05-27 | 2023-01-26 | 더원엔지니어링 주식회사 | Transformer for substations of 154KV or higher that enables efficient heat dissipation |
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