CN117133530B

CN117133530B - Oil immersed high-voltage station transformer and manufacturing process thereof

Info

Publication number: CN117133530B
Application number: CN202311083547.8A
Authority: CN
Inventors: 张树华; 谢剑雄; 张丽珍
Original assignee: GUANGDONG SIHUI INSTRUMENT TRANSFORMER WORKS CO Ltd
Current assignee: GUANGDONG SIHUI INSTRUMENT TRANSFORMER WORKS CO Ltd
Priority date: 2023-08-28
Filing date: 2023-08-28
Publication date: 2024-04-09
Anticipated expiration: 2043-08-28
Also published as: CN117133530A

Abstract

The utility model relates to a transformer for an oil immersed high-voltage station, which comprises the following components: the voltage transformer is arranged in the box body, the porcelain sleeve is arranged at the top end of the box body, the voltage transformer is connected with the porcelain sleeve, and the heat dissipation device is arranged in the porcelain sleeve. The manufacturing process comprises the following steps that firstly, an annular iron core is made of silicon steel sheets with high magnetic conductivity, and is assembled in a lamination and pressing mode; winding a high-voltage winding and a low-voltage winding on the annular iron core by adopting copper wires to manufacture a voltage transformer; step three, installing a voltage transformer in the box body; and step four, installing two porcelain sleeves at the top end of the box body. The transformer can be used as a transformer and a voltage transformer, has the functions of the voltage transformer and the transformer, has the advantages of small volume, low dielectric loss, low temperature rise and the like, can be applied to medium and high voltage power systems, namely 40.5-500 kV power systems, and can be expanded to 12-1100 kV.

Description

Oil immersed high-voltage station transformer and manufacturing process thereof

Technical Field

The utility model belongs to the technical field of transformers, and particularly relates to a transformer for an oil-immersed high-voltage station and a manufacturing process thereof.

Background

The transformer is a special purpose transformer and has two main purposes: the device is used for expanding the range of an alternating current electric instrument, and is used for isolating high voltage and high current and changing the high voltage and high current into low voltage and low current, and then is used as a signal for relay protection, an automatic device and a control loop. In an ac circuit, a special transformer is commonly used to convert a large current into a small current, and to convert a high voltage into a low voltage for measurement. The conversion devices used are known as current transformers and voltage transformers. The mutual inductor has the advantages that the measuring instrument is isolated from high voltage, so that the safety of the instrument and the human body is ensured; the quantity limit of the instrument can be enlarged, and the standardization of the instrument is facilitated; the energy consumption in the measurement can also be reduced. Thus, the use of transformers in the measurement of ac voltage, current and power, as well as in various relay protection and control circuits, is quite widespread.

The patent of publication number CN207097650U discloses an oil-immersed combined transformer, oil-immersed combined transformer includes box, current transformer, voltage transformer, high-voltage porcelain sleeve pipe and arrester, current transformer and voltage transformer locate in the box, the top of box is located to high-voltage porcelain sleeve pipe, one side of box is located to the arrester, high-voltage porcelain sleeve pipe is by once conducting rod group, O type sealing washer, end cap, insulator post-assembling stoving processing, and is pour integratively with epoxy vacuum, porcelain glaze is removed to the bottom surface of insulator, carries out electric field evenly with the semiconductor material and brushes the back earthing treatment. The utility model has long service life, can prevent lightning strike damage, reduces partial discharge capacity, and is suitable for outdoor alternating current 50-60 Hz, and current and voltage measurement and electric energy metering in power lines with rated voltage of 11KV and below.

However, the above-mentioned patent has following deficiency in the in-service use, and above-mentioned mutual-inductor is used for voltage transformer's function, and the usage is single, does not have the function of transformer, and the mutual-inductor uses for a long time, and calorific capacity is big, easily leads to the mutual-inductor to burn out, influences the life of mutual-inductor.

Disclosure of Invention

Therefore, the utility model aims to solve the problems that the use is single, the transformer is not provided with the function of the transformer, the transformer is used for a long time, the heating value is large, the transformer is easy to burn out, and the service life of the transformer is influenced in the prior art.

Therefore, the technical scheme adopted by the utility model is that the transformer for the oil-immersed high-voltage station comprises the following components: the voltage transformer is arranged in the box body, the porcelain sleeve is arranged at the top end of the box body, the voltage transformer is connected with the porcelain sleeve, and the heat dissipation device is arranged in the porcelain sleeve.

Preferably, a lightning arrester is arranged on the box body and is connected with the upper end of the porcelain bushing through a wire.

Preferably, the voltage transformer includes: the annular iron core, annular iron core one side is twined and is had the high-voltage winding, and annular iron core opposite side is twined two low-voltage winding.

Preferably, the top end of the box body is provided with a metal expander, the box body is internally shielded by adopting a semiconductor electric paper-wrapped aluminum cable paper tape structure, oil paper is used as an insulating medium, and the box body is provided with an excitation-free tapping switch.

Preferably, the heat dissipating device includes: the novel rotary fan comprises a shell, a first motor, a crank, a connecting rod and a fixed block, wherein the shell is arranged in the shell, the first motor is arranged in the shell, an output shaft of the first motor is connected with one end of the crank, the other end of the crank is rotationally connected with one end of the connecting rod, the right side of the first motor is provided with the fixed block, the fixed block is connected with the inner wall of the shell, the other end of the connecting rod is hinged with one end of a rocker, a sliding rail in the vertical direction is arranged between the first motor and the fixed block, a sliding block is slidably connected onto the sliding rail, one end of the rocker is hinged with the connecting rod, the other end of the rocker is vertically connected with one end of a first rotating shaft, the other end of the first rotating shaft is rotationally connected with the sliding block, a first gear is coaxially arranged on the first rotating shaft, one end of the second rotating shaft is rotationally connected with the sliding block, the first gear is meshed with the second gear, an opening in the vertical direction is arranged on the outer wall of the shell, and the other end of the second rotating shaft penetrates through the opening to be connected with the fan.

Preferably, a temperature sensor and a processor are arranged in the box body, the temperature sensor is connected with the processor, and the processor is connected with the first motor.

Preferably, the moisture absorber is further included, and the moisture absorber includes: the cylinder body, the breathing pipe, first check valve, blast pipe and second check valve, be provided with the cylinder body of vertical direction in the moisture absorption case, cylinder body top and breathing pipe one end intercommunication, the breathing pipe other end and box intercommunication, be provided with first check valve on the breathing pipe, blast pipe one end and cylinder body top intercommunication, be provided with the second check valve on the blast pipe other end, the blast pipe other end extends outside the moisture absorption case, be provided with the second motor in the moisture absorption case, the second motor output shaft is connected with second crank one end, the second crank other end is provided with the traveller, be provided with annular chute body in the moisture absorption case, annular chute body is by circular arc chute body and the end-to-end intercommunication of straight line chute body is constituteed, the traveller can slide at annular chute body, connecting rod one end and straight line chute body coupling, the connecting rod other end extends to in the cylinder body and piston connection, the piston can reciprocate in the cylinder body from top to bottom.

Preferably, the moisture absorption box is provided with an opening, and the opening is provided with a filter screen.

The manufacturing process is suitable for the oil-immersed high-voltage station transformer, and comprises the following steps:

the method comprises the following steps that firstly, an annular iron core is made of silicon steel sheets with high magnetic conductivity and assembled in a lamination and pressing mode;

winding a high-voltage winding and a low-voltage winding on the annular iron core by adopting copper wires to manufacture a voltage transformer;

step three, installing a voltage transformer in the box body;

and step four, installing two porcelain sleeves at the top end of the box body.

Preferably, in the fourth step, the ceramic bushing is laterally provided with a lightning arrester.

The technical scheme of the utility model has the following advantages: the utility model relates to a transformer for an oil immersed high-voltage station, which comprises the following components: the voltage transformer is arranged in the box body, the porcelain sleeve is arranged at the top end of the box body, the voltage transformer is connected with the porcelain sleeve, and the heat dissipation device is arranged in the porcelain sleeve. The manufacturing process comprises the following steps that firstly, an annular iron core is made of silicon steel sheets with high magnetic conductivity, and is assembled in a lamination and pressing mode; winding a high-voltage winding and a low-voltage winding on the annular iron core by adopting copper wires to manufacture a voltage transformer; step three, installing a voltage transformer in the box body; and step four, installing two porcelain sleeves at the top end of the box body. The transformer can be used as a transformer and a voltage transformer, has the functions of the voltage transformer and the transformer, has the advantages of small volume, low dielectric loss, low temperature rise and the like, can be applied to medium and high voltage power systems, namely 40.5-500 kV power systems, and can be expanded to 12-1100 kV.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of a voltage transformer according to the present utility model;

FIG. 3 is a schematic diagram of a heat dissipating device according to the present utility model;

FIG. 4 is a schematic view of a fan and an opening according to the present utility model;

FIG. 5 is a schematic view of the structure of the dehydrating breather of the present utility model;

the device comprises a 1-box body, a 2-voltage transformer, a 201-annular iron core, a 202-high-voltage winding, a 203-low-voltage winding, a 4-porcelain bushing, a 5-lightning arrester, a 6-wire, a 7-shell, an 8-first motor, a 9-crank, a 10-connecting rod, an 11-fixed block, a 12-rocker, a 13-sliding rail, a 14-sliding block, a 15-swinging rod, a 16-first rotating shaft, a 17-first gear, a 18-second rotating shaft, a 19-second gear, a 20-opening, a 21-fan, a 22-temperature sensor, a 23-processor, a 24-moisture absorption box, a 25-cylinder body, a 26-air suction pipe, a 27-first one-way valve, a 28-exhaust pipe, a 29-second one-way valve, a 30-second motor, a 31-second crank, a 32-sliding column, a 33-circular arc sliding chute body, a 34-linear sliding chute body, a 35-connecting rod, a 36-piston, a 37-opening and a 38-filter screen.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The utility model provides a transformer for an oil immersed high-voltage station, as shown in figure 1, comprising: the voltage transformer comprises a box body 1, a voltage transformer 2 and a porcelain sleeve 4, wherein the voltage transformer 2 is arranged in the box body 1, the porcelain sleeve 4 is arranged at the top end of the box body 1, the voltage transformer 2 is connected with the porcelain sleeve 4, and a heat radiating device is arranged in the porcelain sleeve 4. The lightning arrester 5 is arranged on the box body 1, and the lightning arrester 5 is connected with the upper end of the porcelain bushing 4 through a lead 6, so that lightning stroke can be prevented. The voltage transformer 2 includes: the annular iron core 201, the annular iron core 201 is wound with the high-voltage winding 202 on one side, and the annular iron core 201 is wound with the two low-voltage windings 203 on the other side.

The technical scheme has the working principle and beneficial technical effects that: the transformer composed of the high-voltage winding 202 and the two low-voltage windings 203 can be used as a transformer and a voltage transformer, has the functions of the voltage transformer and the transformer, improves the heat dissipation efficiency of the transformer through the heat dissipation device, has the advantages of small volume, low dielectric loss, maintenance-free performance, low temperature rise, large capacity, high safety reliability and the like, can be applied to medium and high-voltage power systems, namely 40.5-500 kV power systems, and can be expanded to 12-1100 kV.

In one embodiment, the top end of the box body 1 is provided with a metal expander, and when the volume of transformer oil in the transformer changes due to temperature change, the volume of the main body of the expander changes correspondingly, so that the volume compensation function is achieved. The box 1 is internally shielded by adopting a semiconductor electric paper-wrapped aluminum cable paper tape structure, has excellent insulating property, adopts oilpaper as an insulating medium, and is provided with an off-circuit tap switch, when the voltage of a power grid system fluctuates up and down, the number of turns of a primary coil of the product can be adjusted, and the stability of the secondary output voltage is maintained.

In one embodiment, as shown in fig. 3-4, a heat sink includes: the novel fan comprises a shell 7, a first motor 8, a crank 9, a connecting rod 10 and a fixed block 11, wherein the shell 7 is arranged in the box 1, the first motor 8 is arranged in the shell 7, an output shaft of the first motor 8 is connected with one end of the crank 9, the other end of the crank 9 is rotationally connected with one end of the connecting rod 10, the fixed block 11 is arranged on the right side of the first motor 8, the fixed block 11 is connected with the inner wall of the shell 7, the other end of the connecting rod 10 is hinged with one end of a rocker 12, the other end of the rocker 12 is hinged with the fixed block 11, a sliding rail 13 in the vertical direction is arranged between the first motor 8 and the fixed block 11, a sliding block 14 is slidingly connected on the sliding rail 13, one end of a swinging rod 15 is hinged with the connecting rod 10, the other end of the swinging rod 15 is vertically connected with one end of a first rotating shaft 16, the other end of the first rotating shaft 16 is rotationally connected with the sliding block 14, a first gear 17 is coaxially arranged on the first rotating shaft 16, one end of the second rotating shaft 18 is rotationally connected with the sliding block 14, a second gear 19 is coaxially arranged on the second rotating shaft 18, the first gear 17 is meshed with the second gear 19, an opening 20 in the vertical direction is arranged on the outer wall of the shell 7, the other end of the second rotating shaft 18 is connected with a fan 21 through the opening 20.

The technical scheme has the working principle and beneficial technical effects that: the first motor 8 is started to drive the crank 9 to rotate, the crank 9 drives the connecting rod 10 to move, the connecting rod 10 drives the rocker 12 to reciprocate left and right, the connecting rod 10 drives the sliding block 14 to reciprocate up and down along the sliding rail 13, the swinging rod 15 also reciprocates left and right relative to the sliding block 14, the swinging rod 15 drives the first rotating shaft 16 to reciprocate up and down, the first rotating shaft 16 drives the first gear 17 to rotate in a forward and reverse alternate mode along the axis of the first rotating shaft 16, the first gear 17 can reciprocate up and down, the fan 21 is driven to reciprocate up and down along the direction of the opening 20 while rotating in a forward and reverse alternate mode through meshing acceleration of the first gear 17 and the second gear 19, so that a transformer is scanned and blown in the vertical direction, and because the wind speed and the wind direction are continuously changed, a cyclone is easy to form, a large amount of heat around the transformer is taken away, and the radiating efficiency is improved.

In one embodiment, as shown in fig. 1, a temperature sensor 22 and a processor 23 are disposed in the box 1, the temperature sensor 22 is connected with the processor 23, the processor 23 is connected with the first motor 8, the temperature sensor 22 can monitor the temperature value in the box 1, and when the temperature exceeds the warning value, the processor 23 starts the first motor 8 to drive the fan 21 to rotate, so as to cool down each transformer.

In one embodiment, as shown in fig. 5, further comprising a moisture absorber, the moisture absorber comprising: the cylinder body 25, the breathing pipe 26, first check valve 27, blast pipe 28 and second check valve 29, be provided with the cylinder body 25 of vertical direction in the moisture absorption case 24, cylinder body 25 top and breathing pipe 26 one end intercommunication, the breathing pipe 26 other end and box 1 intercommunication, be provided with first check valve 27 on the breathing pipe 26, blast pipe 28 one end and cylinder body 25 top intercommunication, be provided with second check valve 29 on the other end of blast pipe 28, the blast pipe 28 other end extends outside moisture absorption case 24, be provided with second motor 30 in the moisture absorption case 24, second motor 30 output shaft is connected with second crank 31 one end, the second crank 31 other end is provided with the traveller 32, be provided with annular chute body in the moisture absorption case 24, annular chute body is by circular arc chute body 33 and sharp chute body 34 end-to-end intercommunication constitution, traveller 32 can slide in annular chute body, connecting rod 35 one end is connected with sharp chute body 34, the connecting rod 35 other end extends to the cylinder body 25 in and is connected with piston 36, piston 36 can reciprocate in the cylinder body 25.

The technical scheme has the working principle and beneficial technical effects that: when the second motor 30 is started to drive the second crank 31 to rotate, the second crank 31 drives the sliding column 32 to slide in the annular sliding groove body, when the sliding column 32 slides in the circular arc sliding groove body 33, the piston 36 stops moving, when the sliding column 32 slides in the sliding groove body 34, the piston 36 is driven to reciprocate up and down in the cylinder body 25, the piston 36 can reciprocate up and down in the cylinder body 25 and intermittently stop moving, the air flow in the box body 1 can be pumped out through the air suction pipe 26 and then is discharged through the air discharge pipe 28, a large amount of moisture is discharged, the short circuit of electronic devices caused by the moisture is prevented, when the piston 36 stops stopping working in the cylinder body 25, a large amount of air from outside enters the box body 1, a large amount of dust is brought in the box body, and the air gathers in the box body, so that the heat dissipation performance of the transformer is affected.

In one implementation, the moisture absorption box 24 is provided with an opening 37, and a filter screen 38 is arranged on the opening 37 to reduce dust or solid particles from entering the moisture absorption box.

The manufacturing process is suitable for the oil-immersed high-voltage station transformer, and comprises the following steps: step one, an annular iron core 201 is made of silicon steel sheets with high magnetic conductivity and assembled in a lamination and pressing mode; winding a high-voltage winding 202 and a low-voltage winding 203 on an annular iron core 201 by adopting copper wires to manufacture a voltage transformer 2; step three, installing a voltage transformer 2 in the box body 1; and step four, installing two porcelain bushings 4 at the top end of the box body 1, and installing a lightning arrester 5 on the side surface of the porcelain bushing 4.

The technical scheme has the working principle and beneficial technical effects that: the process enables the transformer to have the functions of a voltage transformer and a transformer, and has the advantages of small volume, low dielectric loss, maintenance-free performance, low temperature rise, large capacity, high safety and reliability, high heat dissipation efficiency and the like.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The utility model provides an oily formula high-voltage station is with transformer, its characterized in that includes: the voltage transformer comprises a box body (1), a voltage transformer (2) and a porcelain sleeve (4), wherein the voltage transformer (2) is arranged in the box body (1), the porcelain sleeve (4) is arranged at the top end of the box body (1), the voltage transformer (2) is connected with the porcelain sleeve (4), and a heat dissipation device is arranged in the porcelain sleeve (4);

the heat dissipating device includes: the utility model discloses a novel electric power generation device, which comprises a shell (7), a first motor (8), a crank (9), a connecting rod (10) and a fixed block (11), wherein the shell (7) is arranged in the box (1), the first motor (8) is arranged in the shell (7), an output shaft of the first motor (8) is connected with one end of the crank (9), the other end of the crank (9) is rotationally connected with one end of the connecting rod (10), the fixed block (11) is arranged on the right side of the first motor (8), the fixed block (11) is connected with the inner wall of the shell (7), the other end of the connecting rod (10) is hinged with one end of a rocker (12), the other end of the rocker (12) is hinged with the fixed block (11), a slide rail (13) in the vertical direction is arranged between the first motor (8) and the fixed block (11), a slide block (14) is connected on the slide rail (13), one end of the swing rod (15) is hinged with the connecting rod (10), the other end of the swing rod (15) is vertically connected with one end of a first rotating shaft (16), the other end of the first rotating shaft (16) is rotationally connected with the slide block (14), a first gear (17) is coaxially arranged on the first rotating shaft (16), one end (18) is rotationally connected with the second gear (19), a second gear (19) is coaxially arranged on the first rotating shaft (18), an opening (20) in the vertical direction is arranged on the outer wall of the shell (7), and the other end of the second rotating shaft (18) penetrates through the opening (20) to be connected with a fan (21).

2. The transformer for the oil-immersed high-voltage station according to claim 1, wherein a lightning arrester (5) is arranged on the box body (1), and the lightning arrester (5) is connected with the upper end of the porcelain bushing (4) through a lead (6).

3. The transformer for oil-immersed high-voltage station according to claim 1, wherein the transformer (2) comprises: the annular iron core (201), the high-voltage winding (202) is twined to annular iron core (201) one side, and annular iron core (201) opposite side is twined two low-voltage winding (203).

4. The transformer for the oil-immersed high-voltage station according to claim 1, wherein a metal expander is arranged at the top end of the box body (1), a semiconductor electric paper-coated aluminum cable paper tape structure is adopted in the box body (1) for shielding, oilpaper is adopted as an insulating medium, and a non-excitation tapping switch is arranged on the box body (1).

5. The transformer for the oil-immersed high-voltage station according to claim 1, wherein a temperature sensor (22) and a processor (23) are arranged in the box body (1), the temperature sensor (22) is connected with the processor (23), and the processor (23) is connected with the first motor (8).

6. The transformer for oil-immersed high-voltage station according to claim 1, further comprising a moisture absorber, the moisture absorber comprising: cylinder body (25), breathing pipe (26), first check valve (27), blast pipe (28) and second check valve (29), be provided with cylinder body (25) of vertical direction in hygroscopic case (24), cylinder body (25) top and breathing pipe (26) one end intercommunication, breathing pipe (26) other end and box (1) intercommunication, be provided with first check valve (27) on breathing pipe (26), blast pipe (28) one end and cylinder body (25) top intercommunication, be provided with second check valve (29) on blast pipe (28) other end, blast pipe (28) other end extends out hygroscopic case (24), be provided with second motor (30) in hygroscopic case (24), second motor (30) output shaft is connected with second crank (31) one end, the second crank (31) other end is provided with slide (32), be provided with annular spout body in hygroscopic case (24), annular spout body is by circular arc spout body (33) and straight line spout body (34) head-to-tail intercommunication is constituteed, slide (32) can slide in annular spout body, connecting rod (35) one end and straight line spout body (34) are connected to one end in piston (25) and are connected to piston (36) in the piston (25) other end can reciprocate.

7. The transformer for oil-immersed high-voltage stations according to claim 6, characterized in that an opening (37) is provided on the moisture absorption box (24), and a filter screen (38) is provided on the opening (37).