CN212659414U - High-voltage lead structure and transformer thereof - Google Patents

Abstract

The utility model discloses a high pressure lead wire structure and transformer thereof, include: the iron core comprises an iron core column; the coil comprises an a-phase coil, a b-phase coil and a c-phase coil, wherein an a-phase tapping lead is led out of the a-phase coil, a b-phase tapping lead is led out of the b-phase coil, and a c-phase tapping lead is led out of the c-phase coil; the tapping switch is arranged on the outer side of the iron yoke or the upper side of the connection part of the iron yoke and the iron core column, and the phase a tapping lead wire, the phase b tapping lead wire and the phase c tapping lead wire are all connected with the tapping switch; the phase a tapping lead wire, the phase b tapping lead wire and the phase c tapping lead wire are all arranged along the outer side of the clamping piece. The tapping switch is arranged on the outer side of the iron yoke or on the upper side of the connection part of the iron yoke and the iron core column, and the tapping leads are arranged on the outer side of the clamping piece, so that the tapping leads are prevented from using the space on the upper part of the iron core, the size of the transformer can be effectively reduced, and the manufacturing cost of the transformer is reduced.

Description

High-voltage lead structure and transformer thereof

Technical Field

The utility model relates to a power equipment field, in particular to high-voltage lead structure of three-dimensional wound core transformer and transformer thereof.

Background

The three-dimensional triangular wound core transformer has the advantages of balanced three-phase magnetic circuits, low loss, low noise and the like, is popular and favored by more and more users, and is widely applied to various industries. When the three-dimensional wound core transformer is provided with the non-excitation voltage regulating switch, other parts are mainly arranged in the upper space of the iron yoke at present, then the high-voltage lead crosses the upper part of the iron yoke and is connected with the non-excitation tapping switch, so that the non-excitation tapping switch and the high-voltage lead keep enough insulation distance with the steel piece and the low-voltage lead copper bar, and enough space is required to be reserved between the iron yoke of the transformer and the box cover to meet the installation and the high-voltage lead connection of the non-excitation tapping switch, but the volume of the oil tank is increased, the use of transformer oil is increased, and the manufacturing cost of the transformer is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a high-pressure pin configuration makes high-pressure pin connection tap changer need not span indisputable yoke upper portion again, reduces the transformer tank height, reduces the manufacturing cost of transformer.

The utility model discloses still provide a transformer with this high voltage lead structure.

According to the utility model discloses a high pressure pin configuration of first aspect embodiment includes: the iron core comprises three iron core columns distributed in a regular triangle, and an iron yoke is connected between every two adjacent iron core columns; the coil comprises an a-phase coil, a b-phase coil and a c-phase coil, wherein the a-phase coil, the b-phase coil and the c-phase coil are wound on the three iron core columns respectively, an a-phase tapping lead is led out of the a-phase coil, a b-phase tapping lead is led out of the b-phase coil, and a c-phase tapping lead is led out of the c-phase coil; the tapping switch is arranged on the outer side of the iron yoke or the upper side of the connection part of the iron yoke and the iron core column, and the a-phase tapping lead wire, the b-phase tapping lead wire and the c-phase tapping lead wire are all connected with the tapping switch; the iron core is provided with an upper clamping piece and a lower clamping piece, the coil is fixed on the iron core column through the upper clamping piece and the lower clamping piece, and the phase a tapping lead wire, the phase b tapping lead wire and the phase c tapping lead wire are all distributed along the outer side of the upper clamping piece.

According to the utility model discloses high-pressure lead wire structure has following beneficial effect at least: the tapping switch is arranged on the outer side of the iron yoke or on the upper side of the connection part of the iron yoke and the iron core column, and the phase a tapping lead wire, the phase b tapping lead wire and the phase c tapping lead wire are arranged on the side surface of the upper clamping piece, so that the phase a tapping lead wire, the phase b tapping lead wire and the phase c tapping lead wire are prevented from using the space on the upper part of the iron core, the height of an oil tank of the transformer is reduced, and the manufacturing cost of the transformer is reduced.

According to some embodiments of the present invention, the upper clamp and the coil and the lower clamp and the coil are provided with insulating pads.

According to some embodiments of the utility model, go up the folder and be provided with the lead wire clamp, the lead wire clamp is used for fixing a looks shunting lead wire b looks shunting lead wire with c looks shunting lead wire.

According to some embodiments of the utility model, go up the folder with the vertical screw rod that draws that is provided with between the folder down, draw the one end of screw rod with go up folder fastening connection, draw the other end of screw rod with folder fastening connection down.

According to some embodiments of the utility model, the one end of drawing the screw rod is connected with first nut, first nut sets up go up the upside of folder, first nut with go up the folder butt, the other end of drawing the screw rod is connected with the second nut, the second nut sets up the downside of folder down, the second nut with the folder butt down.

According to some embodiments of the invention, the tap changer is a disk-shaped off-circuit switch, a bar-shaped off-circuit switch or a triangular off-circuit switch.

According to the utility model discloses transformer of second aspect embodiment, include the utility model discloses the first aspect embodiment high-voltage lead structure.

According to the utility model discloses transformer has following beneficial effect at least: the tapping switch is arranged on the outer side of the yoke or on the upper side of the connecting part of the yoke and the core limb, and the phase a tapping lead wire, the phase b tapping lead wire and the phase c tapping lead wire are arranged on the outer side of the clamping piece, so that the phase a tapping lead wire, the phase b tapping lead wire and the phase c tapping lead wire do not need to cross the upper part of the yoke, the space between the yoke and the box cover is avoided, the height of the transformer oil tank can be reduced, the volume of the transformer oil tank is reduced, the use of transformer oil is reduced, and the manufacturing cost of the transformer is reduced.

According to the utility model discloses a some embodiments, including low pressure pin configuration, low pressure pin configuration is including a looks low pressure lead wire, b looks low pressure lead wire, c looks low pressure lead wire, a looks electricity and is led electrical row, b looks electricity and lead electrical row and c looks electricity, a looks low pressure lead wire b looks low pressure lead wire with c looks low pressure lead wire is located threely the triangle-shaped region that the iron core post surrounds is interior and 120 distribution of mutual interval, a looks electricity is led electrical row b looks electricity is led electrical row with the one end that c looks electricity was led electrical row is corresponding the connection respectively a looks low pressure lead wire b looks low pressure lead wire with c looks low pressure lead wire, a looks electricity is led electrical row b looks electricity is led electrical row with the other end that c looks electricity was led electrical row all extends to same one side of iron core.

According to the utility model discloses a some embodiments, it is three including three rectangle frame, it is three the rectangle frame is concatenation in succession and closed formation iron core, every the rectangle frame is including many silicon steel sheets or many amorphous alloy strips, many silicon steel sheets or many amorphous alloy strips coiling in succession forms the rectangle frame.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of a high-voltage lead structure according to an embodiment of the present invention;

fig. 2 is a side view of a high voltage lead structure according to an embodiment of the present invention;

fig. 3 is a top view of a high voltage lead structure according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a low voltage lead structure according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a low-voltage lead in a low-voltage lead structure according to an embodiment of the present invention.

Description of reference numerals:

phase-c coil 110, phase-c tap lead 111, phase-a coil 120, phase-a tap lead 121, phase-b coil 130, phase-b tap lead 131, phase-b coil,

A tap changer 200,

Iron core 300, iron yoke 311, iron core column 312, first nut 321, upper clamp 322, pull screw 323, second nut 324, lower clamp 325, insulating pad 326, lead wire clamp 331,

an a-phase conductive bar 410, a b-phase conductive bar 420, a c-phase conductive bar 430, an a-phase low-voltage outgoing line head end 441, a b-phase low-voltage outgoing line head 442, a c-phase low-voltage outgoing line head 443, an a-phase low-voltage outgoing line tail 451, a b-phase low-voltage outgoing line tail 452, and a c-phase low-voltage outgoing line tail 453.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 3, a high voltage lead structure according to an embodiment of the first aspect of the present invention includes: an iron core 300 including three core legs 312 distributed in a regular triangle; the coil comprises a c-phase coil 110, an a-phase coil 120 and a b-phase coil 130, wherein the c-phase coil 110, the a-phase coil 120 and the b-phase coil 130 are wound on three core legs 312 respectively, a c-phase tapping lead 111 is led out of the c-phase coil 110, a-phase tapping lead 121 is led out of the a-phase coil 120, and a b-phase tapping lead 131 is led out of the b-phase coil 130; a tap changer 200 disposed at an outer side of the yoke 311 or an upper side of a connection portion of the yoke 311 and the core leg 312, and the phase c tap lead 111, the phase a tap lead 121, and the phase b tap lead 131 are connected to the tap changer 200; the c-phase tapping lead 111, the a-phase tapping lead 121 and the b-phase tapping lead 131 are all arranged along the outer side of the clamping piece.

The tap changer 200 is arranged at the outer side of the yoke 311 or at the upper side of the connection part of the yoke 311 and the core limb 312, and the phase c tap lead 111, the phase a tap lead 121 and the phase b tap lead 131 are arranged at the side of the coil, so that the space above the core 300 used by the phase c tap lead 111, the phase a tap lead 121 and the phase b tap lead 131 is avoided, the height of the transformer oil tank is reduced, the volume of the oil tank is reduced, the use of transformer oil is reduced, and the manufacturing cost of the transformer is reduced.

It should be noted that the coil is connected with a high-voltage bushing, and an external high-voltage power supply is electrically connected with the coil through the high-voltage bushing.

In some embodiments, referring to fig. 1 and 2, the core 300 is provided with an upper clip member 322 and a lower clip member 325, and the coil is fixed to the core leg 312 by the upper clip member 322 and the lower clip member 325. The coil is clamped between the upper clamp piece 322 and the lower clamp piece 325, improving the stability of the coil.

In some embodiments, referring to fig. 1 and 2, insulating spacers 326 are disposed between the upper clip 322 and the coil, and between the lower clip 325 and the coil. The upper clamp piece 322 and the lower clamp piece 325 are steel pieces, so as to prevent the coil from contacting the upper clamp piece 322 and the lower clamp piece 325 and influencing the operation of the coil. The insulating pad 326 may be made of wood or insulating rubber.

In some embodiments, referring to fig. 1 to 3, the upper clip 322 is provided with a lead clip 331, and the lead clip 331 is configured to fix the phase c tap lead 111, the phase a tap lead 121, and the phase b tap lead 131, so that the phase c tap lead 111, the phase a tap lead 121, and the phase b tap lead 131 maintain stable positions during the use of the transformer, so that a safe distance is always maintained during the operation, and the stability and safety of the transformer are improved. The main lead wire connected with an external high-voltage power supply is led out of the coil, and the lead wire clamp 331 can also be used for fixing the main lead wire, so that the position of the main lead wire is kept stable, and the stability and the safety of the transformer are improved.

In some embodiments, referring to fig. 1 and 2, a pull screw 323 is vertically disposed between the upper clamping piece 322 and the lower clamping piece 325, one end of the pull screw 323 is fixedly connected to the upper clamping piece 322, and the other end of the pull screw 323 is fixedly connected to the lower clamping piece 325. One end of the pull screw 323 is connected with a first nut 321, the first nut 321 is arranged on the upper side of the upper clamp piece 322, the first nut 321 is abutted against the upper clamp piece 322, the other end of the pull screw 323 is connected with a second nut 324, the second nut 324 is arranged on the lower side of the lower clamp piece 325, and the second nut 324 is abutted against the lower clamp piece 325. The first nut 321 and the second nut 324 are rotated to reduce the distance between the first nut 321 and the second nut 324, the first nut 321 drives the upper clamp piece 322 to move towards the lower clamp piece 325, the upper clamp piece 322 and the lower clamp piece 325 clamp the coil, and the stability of the coil is improved. The pull screws 323 can be arranged in multiple groups to increase the stability of the upper clamp piece 322 and the lower clamp piece 325 when clamping the coil.

It should be noted that tap changer 200 may be a disk-shaped off-field switch, a strip-shaped off-field switch, or a triangular off-field switch.

Referring to fig. 1, a transformer according to an embodiment of the second aspect of the present invention includes a tapping lead structure according to an embodiment of the first aspect of the present invention. The tapping switch 200 is arranged on the outer side of the iron yoke 311 or on the upper side of the connection part of the iron yoke 311 and the iron core column 312, and the phase a tapping lead 111, the phase b tapping lead 121 and the phase c tapping lead 131 are arranged on the side surface of the coil, so that the phase a tapping lead 111, the phase b tapping lead 121 and the phase c tapping lead 131 do not need to cross the upper part of the iron yoke 311, the space between the iron yoke 311 and a tank cover is avoided, the height of a transformer oil tank can be reduced, the volume of the transformer oil tank is reduced, the use of transformer oil is reduced, and the manufacturing cost of the transformer is reduced.

In some embodiments, referring to fig. 4 and 5, a transformer according to an embodiment of the second aspect of the present invention includes a low voltage lead structure, the low voltage lead structure includes an a-phase low voltage lead, a b-phase low voltage lead, a-phase low voltage lead, an a-phase conductive row 410, a b-phase conductive row 420, and a c-phase conductive row 430, the a-phase low voltage lead, the b-phase low voltage lead, and the c-phase low voltage lead are located in a triangular region surrounded by three core legs 312 and are distributed at an interval of 120 ° from each other; one end of the a-phase conductive row 410, one end of the b-phase conductive row 420 and one end of the c-phase conductive row 430 are correspondingly connected with an a-phase low-voltage lead head end 441, an b-phase low-voltage lead head end 442 and a c-phase low-voltage lead head 443, respectively, a common part 440 among the a-phase conductive row 410, the b-phase conductive row 420 and the c-phase conductive row 430 is connected with an a-phase low-voltage lead tail end 451, a b-phase low-voltage lead tail end 452 and a c-phase low-voltage lead tail end 453, and the other ends of the a-phase conductive row 410, the b-phase conductive row 420 and the c-phase conductive row 430 extend to the same.

The a-phase low-voltage lead, the b-phase low-voltage lead and the c-phase low-voltage lead are designed to be positioned in a triangular area surrounded by the three-dimensional wound iron core 300 and are distributed at intervals of 120 degrees, so that the low-voltage leads are more compactly arranged, the three-phase low-voltage leads are designed to be equal in length, the problem of unequal three-phase resistance is solved without increasing the specification of a conducting bar, the consumption of the conducting bar is reduced, the product quality of the three-dimensional wound iron core 300 transformer is guaranteed, and meanwhile, the manufacturing cost of the product is reduced. Meanwhile, the arrangement of the low-voltage lead is more compact, so that the upper clamping piece 322 and the lower clamping piece 325 are reduced, and when the tapping lead is directly led out from the side surface of the coil to be connected with the tapping switch 200, the safe distance between the tapping lead and the upper clamping piece 322 and between the tapping lead and the lower clamping piece 325 does not need to be increased, so that the volume of the transformer oil tank is reduced, and the manufacturing cost is reduced.

In some embodiments, referring to fig. 1 or 5, the iron core 300 includes three rectangular frames, the three rectangular frames are continuously spliced and closed to form the iron core 300, the splicing positions of two adjacent rectangular frames form the iron core column 312, each rectangular frame includes a plurality of silicon steel sheets or a plurality of amorphous alloy strips, and the plurality of silicon steel sheets or the plurality of amorphous alloy strips are continuously wound to form the rectangular frame.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (9)

1. A high voltage lead structure, comprising:

the iron core comprises three iron core columns distributed in a regular triangle, and an iron yoke is connected between every two adjacent iron core columns;

the coil comprises an a-phase coil, a b-phase coil and a c-phase coil, wherein the a-phase coil, the b-phase coil and the c-phase coil are wound on the three iron core columns respectively, an a-phase tapping lead is led out of the a-phase coil, a b-phase tapping lead is led out of the b-phase coil, and a c-phase tapping lead is led out of the c-phase coil;

the tapping switch is arranged on the outer side of the iron yoke or the upper side of the connection part of the iron yoke and the iron core column, and the a-phase tapping lead wire, the b-phase tapping lead wire and the c-phase tapping lead wire are all connected with the tapping switch;

the iron core is provided with an upper clamping piece and a lower clamping piece, the coil is fixed on the iron core column through the upper clamping piece and the lower clamping piece, and the phase a tapping lead wire, the phase b tapping lead wire and the phase c tapping lead wire are all distributed along the outer side of the upper clamping piece.

2. The high-voltage lead structure according to claim 1, wherein insulating spacers are disposed between the upper clip and the coil and between the lower clip and the coil.

3. The high-voltage lead structure according to claim 1, wherein the upper clip member is provided with lead clips for fixing the a-phase tap lead, the b-phase tap lead and the c-phase tap lead.

4. The high-voltage lead structure according to claim 1, wherein a pull screw is vertically disposed between the upper clip and the lower clip, one end of the pull screw is fastened to the upper clip, and the other end of the pull screw is fastened to the lower clip.

5. The high-voltage lead structure according to claim 4, wherein a first nut is connected to one end of the pull screw rod, the first nut is disposed on an upper side of the upper clip member, the first nut abuts against the upper clip member, a second nut is connected to the other end of the pull screw rod, the second nut is disposed on a lower side of the lower clip member, and the second nut abuts against the lower clip member.

6. The high voltage lead configuration of claim 1 wherein said tap changer is a disk shaped off-field switch, a bar shaped off-field switch or a triangular off-field switch.

7. A transformer, characterized in that it comprises a high-voltage lead structure according to any one of claims 1 to 6.

8. The transformer according to claim 7, wherein the low-voltage lead structure comprises an a-phase low-voltage lead, a b-phase low-voltage lead, a c-phase low-voltage lead, an a-phase conducting bar, a b-phase conducting bar and a c-phase conducting bar, the a-phase low-voltage lead, the b-phase low-voltage lead and the c-phase low-voltage lead are located in a triangular area surrounded by three core legs and are distributed at intervals of 120 degrees, one end of the a-phase conducting bar, one end of the b-phase conducting bar and one end of the c-phase conducting bar are respectively and correspondingly connected with the a-phase low-voltage lead, the b-phase low-voltage lead and the c-phase low-voltage lead, and the other ends of the a-phase conducting bar, the b-phase conducting bar and the c-phase conducting bar extend to the same side of the core.

9. The transformer according to claim 7, wherein the iron core comprises three rectangular frames, the three rectangular frames are continuously spliced and closed to form the iron core, each rectangular frame comprises a plurality of silicon steel sheets or a plurality of amorphous alloy strips, and the plurality of silicon steel sheets or the plurality of amorphous alloy strips are continuously wound to form the rectangular frame.

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