CN210006574U

CN210006574U - power transformer for accelerating transformer oil circulation

Info

Publication number: CN210006574U
Application number: CN201921191774.1U
Authority: CN
Inventors: 曾天锐; 佘梦云
Original assignee: LIUPANSHUI VENUS ELECTROMECHANICAL EQUIPMENT CO Ltd
Current assignee: LIUPANSHUI VENUS ELECTROMECHANICAL EQUIPMENT CO Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-01-31
Anticipated expiration: 2029-07-26

Abstract

The utility model provides a accelerate power transformer of transformer oil circulation, including the transformer body, install this external radiator of transformer and install this internal latent oil pump at the transformer, place in the latent oil pump in the transformer and directly be connected with the low pressure side of transformer and acquire the power, the utility model discloses transformer oil circulation speed that can effectual acceleration transformer reduces transformer operating temperature in order to increase the radiating rate, improves transformer overload capacity, extension transformer life.

Description

power transformer for accelerating transformer oil circulation

Technical Field

The utility model relates to a accelerate transformer oil circulation's 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 oil-immersed power transformers with the publication number of CN105405591A, the cooling speed of cooling liquid is increased by a condenser arranged in a transformer box body, but the circulation speed of the cooling liquid is also slow, and the cooling effect is not ideal;

for example, large-sized oil-immersed power transformers with multiple cooling modes, with the publication number of CN201796683U, simultaneously dissipate heat of the transformer through a fan and cooling liquid, wherein the fan and an oil-submerged pump are both installed outside a radiator, and a pipeline is welded on a transformer box body, so that the structure is complex and large.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an accelerate transformer oil circulation's power transformer.

The utility model discloses a following technical scheme can realize.

The utility model provides a accelerate power transformer of transformer oil circulation, include the transformer body and install at this external radiator of transformer, the transformer body includes its shell and installs transformer core and a plurality of winding in the shell, the winding coiling is at transformer core's middle part, and transformer core's upper and lower both ends are tight through last folder and lower folder clamp respectively, goes up the folder and tightens through the tensioning piece between the folder down, transformer ware body and radiator form enclosed construction, are equipped with transformer oil in the transformer, are provided with the circulation oil duct between radiator and the transformer body and accelerate transformer oil circulation speed through installing this internal oily pump of diving at the transformer.

The oil return port and the oil inlet of the radiator are respectively arranged at the lower end and the upper end of the inner wall of the transformer body shell, the submersible pump is fixed on the lower clamping piece and the tensioning piece, and the installation position of the submersible pump is arranged at the oil return port of the radiator and in a gap between two adjacent windings.

The oil outlet end of the oil-submerged pump extends to the middle part of the winding through an oil outlet pipe.

And cushion blocks are arranged between the winding and the upper clamping piece and between the winding and the lower clamping piece.

And the power supply of the submersible pump and any phase wires and zero wires on the low-voltage side in the transformer form a loop.

And a temperature control switch is arranged on a connecting circuit of the submersible pump and the phase line of any of the transformer.

The temperature control switch is installed at the top of the transformer iron core.

The upper clamping piece and the lower clamping piece both comprise two channel steel, and the two ends of the two channel steel clamp the upper end and the lower end of the transformer iron core after being tightened by bolts.

The tensioning piece is a bolt.

The delivery lift of the submersible pump is 300-600L/h.

The beneficial effects of the utility model reside in that: the transformer oil circulation speed of the transformer can be effectively increased to increase the heat dissipation speed, the running temperature of the transformer is reduced, the overload capacity of the transformer is improved, and the service life of the transformer is prolonged. Because the submersible pump is arranged in the transformer and is directly connected with the low-voltage side of the transformer to obtain the power supply, the volume of the transformer is not changed, the oil circuit is shortened due to the arrangement of the submersible pump, and the circulation of transformer oil is realized only through the transformer with smaller lift.

Drawings

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

fig. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic diagram of the electrical circuit of the submersible pump of the present invention;

FIG. 4 is a schematic view of the working principle of the submersible pump of the present invention;

in the figure: 1-temperature control switch, 2-oil submersible pump, 3-oil outlet pipe, 4-oil inlet, 5-oil return port, 6-transformer iron core, 7-clamping screw, 8-upper clamping piece, 9-lower clamping piece, 10-cushion block and 11-winding.

Detailed Description

The following illustrates the present invention, but the scope of the invention is not limited thereto.

A power transformer for accelerating the circulation of transformer oil comprises a transformer body and a radiator arranged outside the transformer body, wherein the transformer body comprises a shell, a transformer iron core 6 and a plurality of windings 11, the transformer iron core 6 and the plurality of windings 11 are arranged 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 respectively clamped by an upper clamping piece 8 and a lower clamping piece 9, the upper clamping piece 8 and the lower clamping piece 9 are tensioned by tensioning pieces, the transformer body and the radiator form closed structures, transformer oil is filled in the transformer, a circulation oil duct is arranged between the radiator and the transformer body, and the circulation speed of the transformer oil is accelerated by an oil-submerged pump 2 arranged.

The oil return port and the oil inlet of the radiator are respectively arranged at the lower end and the upper end of the inner wall of the transformer body shell, the submersible pump 2 is fixed on the lower clamping piece 9 and the tensioning piece, and the installation position of the submersible pump 2 is positioned in a gap between two adjacent windings 11 at the oil return port of the radiator.

The oil outlet end of the submersible pump 2 extends to the middle part of the winding 11 through the oil outlet pipe 3.

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 power supply of the submersible pump 2 and any phase lines and zero lines on the low-voltage side in the transformer form a loop.

And a temperature control switch is arranged on a connecting circuit of the submersible pump 2 and the phase line of any of the transformer.

The temperature control switch is a thermal switch and is arranged on the top of the transformer iron core 6.

The upper clamping piece 8 and the lower clamping piece 9 both comprise two channel steel, and 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.

The tensioning piece is a bolt.

The flow rate of the submersible pump 2 is 300-600L/h.

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 partial hot oil to speed up the speed of heat exchange, reach the purpose that advances step reduction transformer body temperature.

The method is characterized in that a plurality of low-lift submersible pumps are arranged in an oil-immersed power transformer, the arrangement position of the submersible pumps is arranged at the lower part in a transformer box body, the oil inlets of the submersible pumps are just at the positions of low-position oil return openings of radiating pipes or radiating fins, the oil outlets of the submersible pumps are just at the half height positions of windings , the arrangement position of the submersible pumps is at the position where the heat generation amount between every two windings is larger, the number of the submersible pumps is 4 or more than 4, the submersible pumps are used for cooling the transformer oil part passing through a radiator of the transformer at the position above the middle of the windings, the circulation path of the transformer oil in the transformer box body is that hot oil at the upper part of the transformer body enters the radiator from the oil inlets above the radiator, the heat is gradually radiated in the radiator, the density of the transformer oil is gradually increased along with the temperature of the transformer oil, the transformer oil slowly flows down in the radiator to the oil return openings below the radiator and flows back to the lower part of the transformer box body, the transformer at the lower part of the transformer body, the transformer is low-temperature of the transformer oil, the transformer is gradually increased along with the temperature of the oil inlets of the radiator, the transformer, and the transformer body, and the radiator, and the transformer body, so that the.

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 technical scheme includes that a plurality of small submersible pumps are installed in an original transformer belly, the small submersible pumps are completely immersed in transformer oil, the submersible pumps are installed on a lower clamping piece and a tensioning screw rod and are located at a gap between two windings, two sides of the transformer oil are installed, at least two submersible pumps on sides and are installed at least 4 submersible pumps, the transformer oil is partially increased in flowing speed by aid of the submersible pumps, low-position cold oil is pumped into a high-position hot oil area to dilute heat of partial hot oil and accelerate heat exchange speed, the purpose of lowering the temperature of a transformer body by is achieved, a 220V alternating current power supply of the submersible pumps is taken from a phase line and a zero line of a transformer on the low-pressure side of an internal transformer of a transformer box body, the submersible pumps are controlled by a thermal switch to avoid long-term electrified operation of the submersible pumps, when the oil temperature rises to a certain level (45-50), the oil temperature of the submersible pumps automatically starts to drop to a certain level (45-40 submersible oil pumps are automatically, the oil pumps are installed at the position of the submersible pumps, the transformer oil pump is not easy to stop, the submersible pumps are installed at a low-50 oil-pumping position, the transformer oil-water-flushing heat-oil pump is easy, the transformer oil-flushing heat-oil pump is easy to-flushing heat-oil-flushing heat-oil pump, the oil-flushing heat.

Claims

The power transformer capable of accelerating transformer oil circulation comprises a transformer body and a radiator arranged outside the transformer body, and is characterized in that the transformer body comprises a shell, a transformer iron core (6) and a plurality of windings (11) which are arranged 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 by an upper clamping piece (8) and a lower clamping piece (9) respectively, the upper clamping piece (8) and the lower clamping piece (9) are tensioned by a tensioning piece, closed structures are formed by the transformer body and the radiator, transformer oil is filled in the transformer, a circulation oil duct is arranged between the radiator and the transformer body, and the transformer oil circulation speed is accelerated by an oil-submerged pump (2) arranged in the transformer body.
2. The power transformer for accelerating the circulation of transformer oil according to claim 1, wherein the oil return port and the oil inlet port of the radiator are respectively arranged at the lower end and the upper end of the inner wall of the transformer body shell, the submersible pump (2) is fixed on the lower clamping piece (9) and the tensioning piece, and the installation position of the submersible pump (2) is at the oil return port of the radiator and in the gap between two adjacent windings (11).
3. power transformer for accelerating the circulation of transformer oil, according to claim 1, wherein the oil outlet end of the submersible pump (2) extends to the middle of the winding (11) through the oil outlet pipe (3).
4. A power transformer for accelerating the circulation of transformer oil according to claim 3, wherein spacers (10) are provided between the winding (11) and the upper and lower clips (8, 9).
5. The power transformer for accelerating the circulation of transformer oil according to claim 1, wherein the power supply of the submersible pump (2) forms a loop with any phase and neutral wires on the low voltage side of the transformer.
6. The power transformer for accelerating the circulation of transformer oil as claimed in claim 1, wherein a temperature controlled switch is installed on the connection line between the submersible pump (2) and any phase line of the transformer.
7. electric transformer for accelerating the circulation of transformer oil according to claim 6, wherein the temperature controlled switch is installed on the top of the transformer core (6).
8. The power transformer capable of accelerating oil circulation of the transformer as claimed in claim 1, wherein the upper clamp (8) and the lower clamp (9) each comprise two channel steels, and the two ends of the two channel steels are tightened by bolts to clamp the upper and lower ends of the transformer core (6).
9. The power transformer for accelerating the circulation of transformer oil according to claim 1, wherein the tension members are bolts.
10. The power transformer for accelerating the circulation of transformer oil as claimed in claim 1, wherein the flow rate of the submersible pump (2) is 300-600L/h.