CN220691860U

CN220691860U - Dry-type transformer of many connection group conversion

Info

Publication number: CN220691860U
Application number: CN202322336697.7U
Authority: CN
Inventors: 任宪才; 宋大伟; 姜喜勋
Original assignee: Shuifa Chixiang Electric Shandong Co ltd
Current assignee: Shuifa Chixiang Electric Shandong Co ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-03-29
Anticipated expiration: 2033-08-30

Abstract

The utility model provides a multi-connection-group conversion dry-type transformer which comprises an iron core, an upper clamping piece, a lower clamping piece, a side screw, a hoop support, a hoop pull belt, a lower bottom plate, a low-voltage winding and a high-voltage winding, wherein a low-voltage ABC head lead copper bar, a low-voltage A1B1C1 head lead copper bar and a low-voltage XYZ tail head lead copper bar are respectively led out from the top of the low-voltage winding, the upper part of the high-voltage winding is connected with a high-voltage ABC head lead terminal and a high-voltage A1B1C1 head lead terminal, the lower part of the high-voltage winding is connected with a high-voltage XYZ tail head lead terminal, the middle part of the high-voltage winding is connected with a plurality of tapping lead terminals, and the tapping lead terminals are connected through an adjusting copper sheet. Through the technical scheme of the utility model, the three-phase multi-connection-group conversion dry-type transformer structure designed by the utility model can meet the use requirements of multi-connection-type distribution transformers, reduce the purchase cost and save the space occupation.

Description

Dry-type transformer of many connection group conversion

Technical Field

The utility model relates to the technical field of dry transformers, in particular to a dry transformer with multiple connection group conversion.

Background

Along with the rapid development of economy and industry, the requirements on electric safety are continuously perfected, the requirements on stable power supply of a power grid and emergency measures are continuously perfected, and the utility model relates to a three-phase multi-connection-group conversion dry-type transformer which can meet the change of the transformer in different connection groups and meet the special requirements of a test or a special place on the connection groups.

Disclosure of Invention

In order to make up for the defects of the prior art, the utility model provides a dry-type transformer with multiple-connection-group conversion.

The utility model is realized by the following technical scheme: the utility model provides a dry-type transformer of many connection group conversion, which comprises an iron core, go up the folder, lower folder, the side screw rod, the staple bolt support, the staple bolt stretching strap, the lower plate, low voltage winding and high voltage winding, the iron core is installed on the lower plate, the last yoke of iron core and lower yoke are provided with respectively and go up folder and lower folder, go up folder and lower folder all and link together through 2 side screw rods, go up folder left and right sides symmetry welding staple bolt support, be connected with the staple bolt stretching strap between the staple bolt support, the staple bolt stretching strap end is through fixing on the staple bolt support, low voltage winding is around locating on the exterior wall of iron core stem, the periphery of low voltage winding is around being equipped with high voltage winding respectively, be provided with the insulating tube between high voltage winding and the low voltage winding, wherein, the low voltage winding includes conductor copper foil, the interlayer insulating layer, one-tenth turn is around the foil winding on the foil winder, upper portion insulating layer and lower portion insulating layer that lower two ends were equipped with down, be provided with 2 copper sheet upper and lower through-channel down, the staple bolt stretching strap end is connected with on the low voltage winding, low voltage winding is connected with high voltage leading-out terminal and high voltage lead-out terminal 1, high voltage lead-out terminal 1C high voltage lead-out terminal and high voltage lead-out terminal 1, high voltage lead-end 1C and high voltage lead-out terminal 1 are connected to the top end lead-out terminal, high voltage lead-out terminal 1.

Preferably, the bottom plate is connected with the lower clamping piece through a heightening bracket.

As a preferable scheme, the bottom end of the upper clamping piece is fixedly provided with an insulating cushion block through a screw pressing bolt, and the insulating cushion block is used for supporting a low-voltage abc head lead-out copper bar, a low-voltage a1b1c1 head lead-out copper bar and a low-voltage xyz tail head lead-out copper bar.

As the preferable scheme, 2 fans are also installed on the lower bottom plate, and the fans are positioned on two sides of the lower clamping piece.

Preferably, the insulating plate is made of resin, and has a thickness of 0.5mm.

As a preferable scheme, a shock pad is arranged between the bottom end of the iron core and the lower bottom plate from top to bottom.

As a preferable scheme, the low-voltage abc head lead-out copper bar, the low-voltage a1b1c1 head lead-out copper bar and the low-voltage xyz tail head lead-out copper bar are connected through an insulator.

The utility model adopts the technical proposal, and compared with the prior art, the utility model has the following beneficial effects: the three-phase multi-connection-group conversion dry-type transformer structure designed by the utility model can meet the use requirements of multi-connection-type distribution transformers, reduce the purchase cost and save the space occupation.

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

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

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

FIG. 2 is a schematic diagram of the structure of a low voltage winding;

figure 3 is a schematic view of the structure of the high voltage winding,

wherein, the correspondence between the reference numerals and the components in fig. 1 to 3 is:

the copper sheet adjusting device comprises a core 1, an upper clamping piece 2, a lower clamping piece 4, a side screw 4, a 5-hoop support, a 6-hoop drawstring, a 7-lower bottom plate, an 8-low voltage winding, a 9-high voltage winding, a 10-conductor copper foil, an 11-layer insulating layer, a 12-upper end insulating layer, a 13-lower end insulating layer, a 14-air passage, a 15-insulating plate, a 16-low-voltage ABC head lead-out copper bar, a 17-low-voltage A1B1C1 head lead-out copper bar, a 18-low-voltage XYZ tail head lead-out copper bar, a 19-high-voltage ABC head lead-out terminal, a 20-high-voltage A1B1C1 head lead-out terminal, a 21-high-voltage XYZ tail head lead-out terminal, a 22-tap lead-out terminal, a 23-heightening support, a 24-press bolt, a 25-insulating cushion block, a 26 fan, a 27-shock pad, a 28 insulator and a 29-adjusting copper sheet.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

A multi-link group-converted dry-type transformer according to an embodiment of the present utility model will be described in detail with reference to fig. 1 to 3.

As shown in fig. 1, the utility model is realized by the following technical scheme: the utility model provides a dry-type transformer of many connection group conversion, includes iron core 1, goes up folder 2, lower folder 3, side screw 4, staple bolt support 5, staple bolt stretching strap 6, lower plate 7, low voltage winding 8 and high voltage winding 9, and iron core 1 installs on lower plate 7, and upper yoke and the lower yoke of iron core 1 are provided with folder 2 and lower folder 3 respectively, are connected through increasing support 23 between bottom plate 7 and the lower folder 3. A shock pad 27 is arranged between the bottom end of the iron core 1 and the lower bottom plate 7 from top to bottom. The lower bottom plate 7 is also provided with 2 fans 26, and the fans 26 are positioned on two sides of the lower clamping piece 3. The upper clamping piece 2 and the lower clamping piece 3 are connected together through 2 side screws 4, hoop supports 5 are symmetrically welded on the left side and the right side of the upper clamping piece 2, hoop pull belts 6 are connected between the hoop supports 5, the tail ends of the hoop pull belts 6 are fixed on the hoop supports 5, low-voltage windings 8 are wound on the outer surface wall of a core column of the iron core 1, high-voltage windings 9 are respectively wound on the periphery of the low-voltage windings 8, insulating cylinders 30 are arranged between the high-voltage windings 9 and the low-voltage windings 8, the low-voltage windings 8 comprise conductor copper foils 10 and interlayer insulating layers 11, the interlayer insulating layers 11 and the conductor copper foils 10 are wound into foil-wound low-voltage windings 8 in one layer on a foil winding machine, upper end insulating layers 12 and lower end insulating layers 13 are arranged at the upper end and the lower end of the low-voltage windings 8, 2 air passages 14 which are vertically penetrated are arranged in the low-voltage windings 8, insulating plates 15 are arranged on the inner layers and the outer layers of the low-voltage windings 8, and the insulating plates 15 are made of resin, and the thickness of the insulating plates is 0.5mm. As shown in fig. 2, the top of the low-voltage winding 8 is led out to respectively lead out a low-voltage ABC head lead-out copper bar 16, a low-voltage A1B1C1 head lead-out copper bar 17 and a low-voltage XYZ tail head lead-out copper bar 18, as shown in fig. 3, the upper part of the high-voltage winding 9 is connected with a high-voltage ABC head lead-out terminal 19 and a high-voltage A1B1C1 head lead-out terminal 20, the lower part of the high-voltage winding 9 is connected with a high-voltage XYZ tail head lead-out terminal 21, the middle part of the high-voltage winding 9 is connected with a plurality of tapping lead-out terminals 22, and the tapping lead-out terminals 22 are connected through an adjusting copper sheet 29. The bottom end of the upper clamping piece 2 is fixedly provided with an insulating cushion block 25 through a screw pressing bolt 24, and the insulating cushion block 25 is used for supporting a low-voltage abc head lead-out copper bar 16, a low-voltage a1b1c1 head lead-out copper bar 17 and a low-voltage xyz tail head lead-out copper bar 18. The low voltage abc head lead copper bar 16, the low voltage a1b1c1 head lead copper bar 17 and the low voltage xyz tail lead copper bar 18 are connected by an insulator 28.

On the basis of original A, B, C, X, Y, Z and a, B, C, x, Y, z taps, the turn number difference of the D joint and the Y joint is calculated, the taps A1, B1, C1, A1, B1 and C1 are additionally arranged, and different leading-out heads are connected to realize the required connection group. The use of the transformer connection group is satisfied, for example, yy0 (A1B 1C 1X-Y-Z (short circuit), A1B1C 1X-Y-Z (short circuit)) or Yd11 (A1B 1C 1X-Y-Z (short circuit), a B C, a-Y B-Z C-X (short circuit)) and the like are required to be realized, and only the connection is required by the safety regulations.

Practice proves that the three-phase multi-connection-group conversion dry-type transformer structure can meet the use requirements of multi-connection-type distribution transformers, reduce purchasing cost and save space occupation.

In the description of the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model; the terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a dry-type transformer of many connection group conversion, including iron core (1), go up folder (2), lower folder (3), side screw rod (4), staple bolt support (5), staple bolt stretching strap (6), lower plate (7), low-voltage winding (8) and high-voltage winding (9), iron core (1) are installed on lower plate (7), go up the yoke and be provided with folder (2) and folder (3) down respectively down on iron core (1), go up folder (2) and folder (3) all link together through 2 side screw rods (4), go up folder (2) left and right sides symmetry welding staple bolt support (5), be connected with staple bolt stretching strap (6) between staple bolt support (5), staple bolt stretching strap (6) end is through fixing on staple bolt support (5), low-voltage winding (8) are around locating on the exterior wall of iron core (1) stem, the periphery of low-voltage winding (8) is around being equipped with high-voltage winding (9) respectively, be provided with between high-voltage winding (9) and the low-voltage winding (8) respectively, be provided with between folder (2) and folder (3) and lower folder (3) all through 2 side screw rods (4), be connected with staple bolt stretching strap (8) between staple bolt support (5), be a copper foil (11) insulating layer, it is insulating layer (10) and insulating layer, it is that insulating layer (10) are around insulating layer, it is including insulating layer (11), an upper end insulating layer (12) and a lower end insulating layer (13) which are arranged at the upper end and the lower end of the low-voltage winding (8), 2 air passages (14) which are penetrated up and down are arranged in the low-voltage winding (8), insulating plates (15) are arranged on the inner layer and the outer layer of the low-voltage winding (8), a low-voltage ABC head lead copper bar (16), a low-voltage A1B1C1 head lead copper bar (17) and a low-voltage XYZ tail head lead copper bar (18) are respectively led out from the top of the low-voltage winding (8), a high-voltage ABC head lead terminal (19) and a high-voltage A1B1C1 head lead terminal (20) are connected to the upper part of the high-voltage winding (9), a plurality of tapping lead terminals (22) are connected to the middle part of the high-voltage winding (9), and the tapping lead terminals (22) are connected through an adjusting copper sheet (29).

2. A multiple junction-group-converted dry-type transformer according to claim 1, characterized in that the base plate (7) and the lower clamp (3) are connected by means of lifting brackets (23).

3. The multi-connection-group-conversion dry-type transformer according to claim 1, wherein an insulating cushion block (25) is fixedly arranged at the bottom end of the upper clamping piece (2) through a screw pressing bolt (24), and the insulating cushion block (25) is used for supporting a low-voltage abc head lead-out copper bar (16), a low-voltage a1b1c1 head lead-out copper bar (17) and a low-voltage xyz tail head lead-out copper bar (18).

4. A multi-link switching dry-type transformer according to claim 1, characterized in that 2 fans (26) are also mounted on the lower base plate (7), the fans (26) being located on both sides of the lower clamp (3).

5. A multi-link group switching dry-type transformer according to claim 1, wherein the insulating plate (15) is made of resin and has a thickness of 0.5mm.

6. A multi-link switching dry-type transformer according to claim 1, characterized in that a shock pad (27) is provided between the bottom end of the core (1) and the lower plate (7) from top to bottom.

7. A multi-junction-group-converted dry transformer according to claim 1, wherein the low-voltage abc head lead copper bar (16), the low-voltage a1b1c1 head lead copper bar (17) and the low-voltage xyz tail lead copper bar (18) are connected by an insulator (28).