CN210403444U - Power transformer capable of accelerating circulation and cooling of transformer oil - Google Patents
Power transformer capable of accelerating circulation and cooling of transformer oil Download PDFInfo
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- CN210403444U CN210403444U CN201921192804.0U CN201921192804U CN210403444U CN 210403444 U CN210403444 U CN 210403444U CN 201921192804 U CN201921192804 U CN 201921192804U CN 210403444 U CN210403444 U CN 210403444U
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Abstract
The utility model provides a power transformer for accelerating the circulation and cooling of transformer oil, which comprises a radiator sealed with the outside and a transformer body arranged in the radiator; the transformer oil cooling device is characterized in that the radiator radiates the transformer body through transformer oil, a circulating oil duct is arranged on the radiator, the circulating speed is increased through an oil-submersible pump arranged on the side face of the transformer body, and an air cooling device for increasing the transformer oil cooling is arranged outside the radiator. The utility model discloses can be effectual the coolant oil circulation rate and the cooling rate of accelerating the transformer in order to increase the radiating rate of transformer, effectively reduce transformer operating temperature, improve transformer overload capacity, extension transformer life.
Description
Technical Field
The utility model relates to an accelerate transformer oil circulation and refrigerated power transformer.
Background
The power for circulating the transformer oil usually comes from the temperature change of the transformer oil, the density change of the transformer oil, and the expansion and contraction of the transformer oil, so the circulation speed of the transformer oil is very slow, the heat exchange speed is also very slow, and the cooling effect is limited. In order to effectively reduce the temperature rise of the transformer caused by the operation of the transformer, the circulation speed and the heat exchange speed of the transformer oil are increased.
For an oil-immersed power transformer with the publication number of CN105405591A, the cooling speed of the transformer oil is increased by a condenser installed in the transformer tank, but the circulation speed of the transformer oil is also slow, and the cooling effect is not ideal;
for example, in a large oil-immersed power transformer with multiple cooling modes, which is disclosed as CN201796683U, the transformer is cooled simultaneously by a fan and cooling liquid, the fan and the submersible pump are both installed outside a radiator, but the transformer is welded with a pipeline on a transformer box, so that the structure is complex and the volume is large. The fan is not obvious to the transformer outside radiating effect, has still increased the volume and the cost of manufacture of transformer, arranges the submersible pump in outside the transformer, and the circulating line length of transformer oil increases the lift that has increased the submersible pump.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an accelerate transformer oil circulation and refrigerated power transformer.
The utility model discloses a following technical scheme can realize.
The utility model provides a power transformer for accelerating the circulation and cooling of transformer oil, which comprises a transformer body and a radiator arranged outside the transformer body; the transformer oil cooling device is characterized in that the transformer body and the radiator form a closed structure, transformer oil is filled in the transformer, a circulating oil duct is arranged between the radiator and the transformer body, the circulating speed is increased through an oil-submerged pump arranged in the transformer body, and an air cooling device for increasing the oil cooling of the transformer is arranged outside the radiator.
The transformer body comprises a shell, a transformer iron core and a plurality of windings, wherein the transformer iron core and the windings are installed in the shell, the windings are wound in the middle of the transformer iron core, the upper end and the lower end of the transformer iron core are clamped through an upper clamping piece and a lower clamping piece respectively, and the upper clamping piece and the lower clamping piece are tensioned through a tensioning piece.
The oil return port and the oil inlet of radiator set up respectively in the lower extreme and the upper end of transformer body shell inner wall, the oil-submersible pump is installed in the oil-out department of radiator and in the clearance between two adjacent windings, the oil-out of oil-submersible pump extends to the middle part of winding through going out the oil pipe.
The air cooling device comprises a plurality of fans which are uniformly distributed on the radiator through a support.
The fan blows upward wind with an angle of 15-20 degrees towards the radiator.
The submersible pump and the fan both use 220V alternating current of a power supply, and the submersible pump and the fan form a loop with any live wire and zero line on the low-voltage side of the transformer.
Temperature control switches are arranged on the connection lines of the submersible pump, the fan and any phase line and zero line on the low-voltage side of the transformer.
The temperature control switch of the submersible pump is arranged at the upper end of a transformer core in the transformer body, the temperature control switch of the fan is arranged in an oil temperature monitoring pipe at the top end of a transformer shell, one end of the oil temperature monitoring pipe is closed and extends into the transformer body, and transformer oil is filled in the oil temperature monitoring pipe.
And cushion blocks are arranged between the winding and the upper clamping piece and between the winding and the lower clamping piece.
The upper clamping piece and the lower clamping piece both comprise two channel steel, the upper end and the lower end of the transformer iron core are clamped tightly after the two ends of the two channel steel are tightened through bolts, and the tightening pieces are bolts.
The beneficial effects of the utility model reside in that can effectually accelerate the cooling oil circulation rate of transformer and the radiating rate of cooling rate in order to increase the transformer, avoid installing the volume that leads to increasing the transformer outside the transformer with the oil pump of diving, the oil pump of diving is installed and is made the lift of the required oil pump of diving become little in the transformer's length that can also shorten circulation line, the fan evenly carries out the heat exchange to the large tracts of land on the radiator, effectively reduces transformer operating temperature, improves transformer overload capacity, extension transformer life.
Drawings
Fig. 1 is a schematic structural diagram of a transformer main body of the present invention;
fig. 2 is a schematic top view of the transformer main body of the present invention;
FIG. 3 is a schematic view of the air-cooling structure of the present invention;
FIG. 4 is a schematic diagram of the electrical circuit of the submersible pump of the present invention;
FIG. 5 is a schematic diagram of the fan circuit of the present invention;
in the figure: 1-temperature control switch, 2-oil submersible pump, 3-oil outlet pipe, 4-oil inlet, 5-oil outlet, 6-transformer iron core, 7-clamping screw, 8-upper clamping piece, 9-lower clamping piece, 10-cushion block, 11-winding, 12-radiator, 13-fan, 14-oil temperature monitoring pipe and 15-thermosensitive switch.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
A power transformer for accelerating the circulation and cooling of transformer oil comprises a transformer body and a radiator arranged outside the transformer body; the transformer oil cooling device is characterized in that the transformer body and the radiator form a closed structure, transformer oil is filled in the transformer, a circulating oil duct is arranged between the radiator and the transformer body, the circulating speed is increased through the submersible pump 2 arranged in the transformer body, and an air cooling device for increasing the transformer oil cooling is arranged outside the radiator.
The transformer body comprises a shell, a transformer iron core 6 and a plurality of windings 11, wherein the transformer iron core 6 and the windings 11 are installed in the shell, the windings 11 are wound in the middle of the transformer iron core 6, the upper end and the lower end of the transformer iron core 6 are clamped through an upper clamping piece 8 and a lower clamping piece 9 respectively, and the upper clamping piece 8 and the lower clamping piece 9 are tensioned through tensioning pieces.
The oil return port and the oil inlet of radiator set up respectively in the lower extreme and the upper end of transformer body shell inner wall, submersible pump 2 installs in the oil-out department of radiator and in the clearance between two adjacent windings 11, submersible pump 2's oil-out extends to the middle part of winding 11 through oil pipe 3.
The air cooling device comprises a plurality of fans which are uniformly distributed on the radiator through a support.
The fan blows upward wind with an angle of 15-20 degrees towards the radiator.
The submersible pump 2 and the fan both use 220V alternating current power supply, and the submersible pump and the fan form a loop with any live wire and zero line on the low-voltage side of the transformer.
Temperature control switches are arranged on the connecting lines of any phase line and the zero line of the low-voltage sides of the submersible pump, the fan and the transformer.
The temperature control switch of the submersible pump is arranged at the upper end of a transformer core 6 in the transformer body, the temperature control switch of the fan is arranged in an oil temperature monitoring pipe at the top end of a transformer shell, one end of the oil temperature monitoring pipe is closed and extends into the transformer body, and transformer oil is filled in the oil temperature monitoring pipe.
And cushion blocks 10 are arranged between the winding 11 and the upper clamping piece 8 and between the winding and the lower clamping piece 9.
The upper clamping piece 8 and the lower clamping piece 9 both comprise two channel steel, the two ends of the two channel steel clamp the upper end and the lower end of the transformer iron core 6 tightly after being tightened by bolts, and the tightening pieces are bolts.
This application makes transformer oil part increase flow velocity with the latent oil pump helping hand, goes into the hot oil district of high-order with the cold oil pump of low position simultaneously, dilutes the heat of partly hot oil to accelerate the speed of heat exchange, reach the purpose that further reduces transformer body temperature.
At a plurality of low-lift submersible pumps of oily formula power transformer internally mounted, the mounted position is in the inside lower part of transformer box, and the submersible pump oil inlet is just in cooling tube or fin low level oil return opening position, and the submersible pump oil-out is just at half high position of winding. The installation position of the submersible pumps is at the position where the heat productivity between every two windings is large, and the number of the submersible pumps is 4 or more than 4. The submersible pump has the following functions: and pumping the transformer oil part cooled by the transformer radiator to a position above the middle part of the winding. The circulation path of the transformer oil in the transformer tank body is as follows: hot oil on the upper portion of the transformer body enters the radiator from an oil inlet on the upper portion of the radiator, the heat is gradually dissipated in the radiator, the density of the transformer oil is gradually increased along with the temperature reduction of the transformer oil, the transformer oil slowly flows from top to bottom in the radiator and flows back to an oil return opening on the lower portion of the radiator, the temperature of the transformer oil on the lower portion of the transformer body is lower, the transformer oil with lower temperature obtains heat on a transformer winding and an iron core, the density is gradually reduced along with the gradual temperature increase, the transformer oil with lower density moves upwards, the transformer oil moves to the upper portion of the transformer box from the lower portion of the transformer box and then enters the oil inlet of the radiator, and therefore. In the movement process, circulation and heat exchange are continuously realized from the oil inlet at the upper part of the radiator, the oil return port at the lower part of the radiator, the lower part of the transformer body, the middle part and the upper part of the transformer body, and heat generated by the transformer body is gradually taken out, so that the aim of reducing the temperature of the transformer is fulfilled.
The circulation path and the mode of the transformer oil can be known as follows: the power for realizing the circulation of the transformer oil comes from the temperature change of the transformer oil, the density change of the transformer oil and the expansion and contraction of heat, so the circulation speed of the transformer oil is very slow, the heat exchange speed is also very slow, and the cooling effect is limited. In order to effectively reduce the temperature of the temperature rise of the transformer caused by the operation of the transformer, the circulation speed and the heat exchange speed of the transformer oil are increased.
The purpose of this technical scheme is exactly to install several submersible pumps in former transformer belly to the submersible pump is totally submerged in transformer oil, installs the submersible pump on folder and tensioning screw down, and its position also is in the space department between two windings, and both sides all need to install, and two at least submersible pumps on one side, 4 submersible pumps need to install altogether at least. The transformer oil is partially accelerated to flow by the aid of the power of the submersible pump, and cold oil at a low position is pumped into a hot oil area at a high position to dilute heat of part of hot oil and accelerate heat exchange, so that the purpose of further reducing the temperature of the transformer body is achieved, wherein a 220V alternating current power supply of the submersible pump is locally taken from any phase line and zero line on the low-voltage side of the transformer in a transformer box body; in order to prevent the submersible pump from working for a long time in a charged mode, the operation of the submersible pump is controlled by a thermal switch, when the oil temperature rises to a certain degree (45-50 ℃), the oil pumping is started automatically! The oil temperature is reduced to a certain degree (45-40 ℃), the oil pumping is automatically stopped! The oil inlet of the oil-submerged pump is positioned at the oil return port of the radiator, the oil outlet of the oil-submerged pump is positioned in the middle of the transformer winding, the oil temperature above the middle is higher, the oil-submerged pump can flush hot oil with higher temperature from the cold oil pump, and the speed of the circulation of the cold and hot oil is accelerated; generally, the oil temperature is higher at the position between two phase windings of the transformer, so the submersible pump is required to be arranged at the position where the oil temperature is easy to rise; the volume of the submersible pump is small, but the lift cannot be too high, and the flow is not necessarily too large, so that the submersible pump is suitable. The lift is generally 0.6-1.3 m, and the flow rate is generally 300-600L/h. The submersible pump has small volume and low power consumption: 2-25W, low noise: the oil-submersible pump is muted. This application is preceding at oil-immersed power transformer, back, on the radiator of left and right four sides, install the fan battle array of constituteing by a plurality of silence axial compressor little fan additional, the number of the little fan of silence axial compressor is confirmed according to transformer radiator's projection area in the fan battle array, this technical scheme's purpose is exactly when high temperature transformer oil flows through the radiator downstream from radiator upper portion oil inlet, the fan battle array is hugged closely the fan and is bloied, the speed of heat exchange accelerates, reach the purpose that reduces transformer body temperature.
The circulation path of the transformer oil inside the transformer tank is as follows: hot oil on the upper portion of the transformer body enters the radiator from an oil inlet on the upper portion of the radiator, the heat is gradually dissipated in the radiator, the density of the transformer oil is gradually increased along with the temperature reduction of the transformer oil, the transformer oil slowly flows from top to bottom in the radiator and flows back to an oil return opening on the lower portion of the radiator, the temperature of the transformer on the lower portion of the transformer body is lower, the transformer oil with lower temperature obtains heat on a transformer winding and an iron core, the density is gradually reduced along with the gradual temperature increase, the transformer oil with lower density moves upwards, the transformer oil moves to the upper portion of the transformer box from the lower portion of the transformer box and then enters the oil inlet of the radiator, and therefore. In the movement process, circulation and heat exchange are continuously realized from the oil inlet at the upper part of the radiator, the oil return port at the lower part of the radiator, the lower part of the transformer body, the middle part and the upper part of the transformer body, and heat generated by the transformer body is gradually taken out, so that the aim of reducing the temperature of the transformer is fulfilled.
According to the capacity of the oil-immersed power transformer and the power transformer with small capacity, only one surface of the power transformer is provided with a fan heater, and along with the gradual increase of the capacity of the transformer, the front surface and the rear surface of the power transformer are provided with radiators, or the front surface, the rear surface, the left surface and the right surface of the power transformer are provided with radiators.
The technical scheme aims to ensure that when high-temperature transformer oil flows through the radiator from an oil inlet at the upper part of the radiator and moves downwards, the fan array is tightly attached to the radiator to blow air, the heat exchange speed is accelerated, and the purpose of reducing the temperature of a transformer body is achieved.
The utility model discloses a key point: 1. the 220V alternating current power supply of the submersible pump and the fan array is locally taken from any phase line and zero line on the low-voltage side of the transformer; 2. in order to avoid long-term electrified work of the submersible pump and the fan array, the work of the submersible pump and the fan array is controlled by a thermal switch, when the oil temperature rises to a certain degree (45-50 ℃), the submersible pump and the fan array automatically start to work! The oil temperature is reduced to a certain degree (45-40 ℃), the submersible pump and the fan array automatically stop working! 3. The installation position of the submersible pump thermal switch is arranged on the top of the transformer iron core, the installation position of the fan array thermal switch is arranged in the oil temperature monitoring pipe on the top of the transformer, and one thermal switch or a plurality of thermal switches can be installed at each position.
Claims (10)
1. The utility model provides an accelerate transformer oil circulation and refrigerated power transformer, includes the transformer body and installs the radiator outside the transformer body, its characterized in that: the transformer oil cooling device is characterized in that the transformer body and the radiator form a closed structure, transformer oil is filled in the transformer, a circulating oil duct is arranged between the radiator and the transformer body, the circulating speed is accelerated through an oil-submerged pump (2) installed in the transformer body, and an air cooling device for accelerating transformer oil cooling is installed outside the radiator.
2. A power transformer with accelerated transformer oil circulation and cooling as claimed in claim 1, wherein: the transformer body comprises a shell, and a transformer core (6) and a plurality of windings (11) which are arranged in the shell, wherein the windings (11) are wound in the middle of the transformer core (6), the upper end and the lower end of the transformer core (6) are clamped by an upper clamping piece (8) and a lower clamping piece (9) respectively, and the upper clamping piece (8) and the lower clamping piece (9) are tensioned by a tensioning piece.
3. A power transformer with accelerated transformer oil circulation and cooling as claimed in claim 1, wherein: the oil return port and the oil inlet of radiator set up respectively in the lower extreme and the upper end of the inner wall of transformer body shell, submersible pump (2) are installed in the oil-out department of radiator and in the clearance between two adjacent windings (11), the oil-out of submersible pump (2) extends to the middle part of winding (11) through oil outlet pipe (3).
4. A power transformer with accelerated transformer oil circulation and cooling as claimed in claim 1, wherein: the air cooling device comprises a plurality of fans which are uniformly distributed on the radiator through a support.
5. A power transformer with accelerated transformer oil circulation and cooling according to claim 4, wherein: the fan blows upward wind with an angle of 15-20 degrees towards the radiator.
6. A power transformer with accelerated transformer oil circulation and cooling as claimed in claim 1, wherein: the submersible pump (2) and the fan both use 220V alternating current of a power supply, and the submersible pump and the fan form a loop with any live wire and zero line on the low-voltage side of the transformer.
7. A power transformer with accelerated transformer oil circulation and cooling as claimed in claim 1, wherein: temperature control switches are arranged on any phase line connecting circuit of the submersible pump, the fan and the low-voltage side of the transformer.
8. A power transformer with accelerated transformer oil circulation and cooling as claimed in claim 7, wherein: the temperature control switch of the submersible pump is arranged at the upper end of a transformer core (6) in the transformer body, the temperature control switch of the fan is arranged in an oil temperature monitoring pipe at the top end of a transformer shell, one end of the oil temperature monitoring pipe is closed and extends into the transformer body, and transformer oil is filled in the oil temperature monitoring pipe.
9. A power transformer with accelerated transformer oil circulation and cooling as claimed in claim 2, wherein: cushion blocks (10) are arranged between the winding (11) and the upper clamping piece (8) and between the winding and the lower clamping piece (9).
10. A power transformer with accelerated transformer oil circulation and cooling as claimed in claim 2, wherein: the upper clamping piece (8) and the lower clamping piece (9) both comprise two channel steel, the two ends of the two channel steel clamp the upper end and the lower end of the transformer iron core (6) tightly after being tightened by bolts, and the tightening pieces are bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921192804.0U CN210403444U (en) | 2019-07-26 | 2019-07-26 | Power transformer capable of accelerating circulation and cooling of transformer oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921192804.0U CN210403444U (en) | 2019-07-26 | 2019-07-26 | Power transformer capable of accelerating circulation and cooling of transformer oil |
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| Publication Number | Publication Date |
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| CN210403444U true CN210403444U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921192804.0U Active CN210403444U (en) | 2019-07-26 | 2019-07-26 | Power transformer capable of accelerating circulation and cooling of transformer oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739125A (en) * | 2019-07-26 | 2020-01-31 | 六盘水金星机电设备有限公司 | power transformer for accelerating transformer oil circulation and cooling |
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- 2019-07-26 CN CN201921192804.0U patent/CN210403444U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739125A (en) * | 2019-07-26 | 2020-01-31 | 六盘水金星机电设备有限公司 | power transformer for accelerating transformer oil circulation and cooling |
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