CN211742883U - Iron core clamping piece with insulation structure for distribution transformer - Google Patents

Abstract

The utility model provides an iron core folder that is used for distribution transformer to have insulation system, including last folder, lower folder, left side folder and right folder are constituteed, the iron core folder includes the folder body, folder body inboard installation insulated paper board, the equal longitudinal parallel arrangement in both sides installs a plurality of insulation pad inside and outside insulated paper board, folder body run through on the surface and be equipped with a plurality of pad hole, the pad hole equals with insulation pad's quantity and position and shape are corresponding, insulation pad of insulated paper board one side passes the pad hole, insulation pad of insulated paper board opposite side is hugged closely on the iron core piece in the iron core outside, folder body and insulated paper board both ends are equipped with two first screws and second screw respectively, link together folder body and insulated paper board through the screw rod. Through the technical scheme of the utility model, solved the thermal ageing problem that exists between traditional iron core and the folder is insulating, reduced the possibility that the air content increases in the oil, improved the reliability of power supply.

Description

Iron core clamping piece with insulation structure for distribution transformer

Technical Field

The utility model relates to a transformer equipment technical field, particularly, in particular to an iron core folder that is used for distribution transformer to have insulation system.

Background

At present, the clamping piece insulation of the 10kV distribution power transformer mostly adopts a whole-plate processing method, and the processing method increases the use of insulating materials. Because the clamp insulation has sheltered from the cooling surface of outside iron core, the clamp insulation directly contacts with the iron core again, and the heat that the iron core gived off directly conducts to the clamp insulation. For a large-capacity distribution transformer and a distribution transformer, the temperature of a transformer core rises in short-time overload operation, the whole plate is adopted for machining the clamp insulation, no oil circuit is used for heat dissipation, heat cannot be dissipated through the oil circuit, the clamp insulation heat aging is easily caused in the long-term operation process of the transformer, the gas content in transformer oil is increased, and the reliability of power supply is reduced.

SUMMERY OF THE UTILITY MODEL

In order to compensate for the deficiencies of the prior art, the utility model provides an iron core folder that is used for distribution transformer to have insulation system.

The utility model discloses a realize through following technical scheme: an iron core clamping piece with an insulation structure for a distribution transformer comprises an upper clamping piece and a lower clamping piece, wherein the upper clamping piece and the lower clamping piece have the same structure and are respectively composed of a left clamping piece and a right clamping piece, an iron core is arranged between the left clamping piece and the right clamping piece and is connected with the left clamping piece and the right clamping piece through a screw rod, wherein, the iron core clamping piece comprises a clamping piece body, an insulating paper board is arranged at the inner side of the clamping piece body, a plurality of insulating cushion blocks are longitudinally arranged and arranged in parallel at the inner side and the outer side of the insulating paper board, a plurality of cushion block holes are arranged on the surface of the clamping piece body in a penetrating way, the number of the cushion block holes is equal to that of the insulating cushion blocks, the positions and the shapes of the cushion block holes correspond to those of the insulating cushion blocks, the insulating cushion block at one side of the insulating paper board penetrates through the cushion block holes, the insulating cushion block at the other side of the insulating paper board is tightly attached to the iron core sheet at the outermost, the clamping piece body and the insulating paperboard are connected together through the screw rod sequentially passing through the second screw hole and the first screw hole.

Preferably, the thickness of the insulating paperboard is 1 mm.

Preferably, the shape of the insulating pad is cuboid.

Further, the width of the insulating pad block is 40mm or 63 mm.

Preferably, the insulating paper board is smaller than the clamp body in size.

Preferably, the iron core is formed by overlapping iron core pieces step by step.

Preferably, the iron core clamp is applied to a 10kV distribution power transformer

The utility model discloses owing to adopted above technical scheme, compare with prior art and make it have following beneficial effect: through adopting the technical scheme of the utility model, because insulating cushion separates the certain distance and arranges, just formed the oil circuit between iron core and the folder is insulating like this, solved the thermal ageing problem that exists between traditional iron core and the folder is insulating, strengthened certain thermal diffusivity, reduced the possibility that the air content increases in the oil, improved the reliability of power supply.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, 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 perspective view of the present invention;

FIG. 2 is a schematic view of the three-dimensional structure of the utility model after rotating;

FIG. 3 is a schematic perspective view of an insulating paperboard;

FIG. 4 is a schematic structural view during assembly of the present invention;

FIG. 5 is a schematic view of the structure of section A-A in FIG. 4;

wherein, the corresponding relationship between the reference numbers and the components in fig. 1 to 3 is:

the clamping piece comprises a clamping piece body 1, an insulating paper board 2, an insulating cushion block 3, a cushion block hole 4, a first screw hole 5, a second screw hole 6, an upper clamping piece 11, a lower clamping piece 12, a left clamping piece 13, a right clamping piece 14, an iron core 15 and a screw rod 16.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The insulation clamp of the distribution transformer according to the embodiment of the present invention will be specifically described with reference to fig. 1 to 5.

As shown in fig. 1 to 5, the present invention provides an iron core clamp with an insulation structure for a distribution transformer, which includes an upper clamp 11 and a lower clamp 12, wherein the upper clamp 11 and the lower clamp 12 have the same structure and are composed of a left clamp 13 and a right clamp 14, and an iron core 15 is installed between the left clamp 13 and the right clamp 14 and connected with the left clamp 13 and the right clamp 14 by a screw 16; wherein, the iron core folder includes folder body 1, 1 inboard installation insulated paper board 2 of folder body, insulated paper board 2's thickness is 1mm, insulated paper board 2's the equal vertical parallel arrangement in inside and outside both sides installs a plurality of insulating cushion 3, leave certain interval between the insulating cushion 3, folder body 1 runs through on the surface and is equipped with a plurality of cushion hole 4, cushion hole 4 equals and position and shape corresponding with insulating cushion 3's quantity, insulating cushion 3 of 2 one sides of insulated paper board passes cushion hole 4, expose in the device outside, more do benefit to the heat dissipation. The insulating cushion blocks 3 on the other side of the insulating paper board 2 are tightly attached to the iron core piece on the outermost side of the iron core 15, and due to the fact that certain intervals are reserved among the insulating cushion blocks 3, transformer oil can flow through the insulating part of the clamping piece and the iron core pieces, the heat dissipation effect is achieved, the hot point temperature rise of the outermost iron core is reduced, and the safe operation of the transformer is guaranteed. Two first screw holes 5 are respectively formed in two ends of the clamp body 1, two second screw holes 6 are respectively formed in two ends of the insulating paper board 2, and the clamp body 1 and the insulating paper board 2 are connected together through the screw rods 16 sequentially penetrating through the second screw holes 6 and the first screw holes 5. The insulating spacer 3 is shaped as a rectangular parallelepiped, since the distribution transformer clamp is mostly made of 40mm or 63mm channel steel. The insulating paper sheet 2 is smaller in size than the clip body 1. The iron core 15 is formed by stacking iron core pieces step by step. The iron core clamp is applied to a 10kV distribution power transformer.

The insulating cushion blocks 3 are arranged at certain intervals, so that an oil path is formed between the iron core 15 and the clamping piece; and the insulating cushion block 3 on the other side of the insulating paper board 2 penetrates through the cushion block hole 4 and is exposed outside the device, so that heat dissipation is facilitated, the problem of thermal aging existing between the traditional iron core and the clamp insulation is solved, the possibility of increasing the gas content in oil is reduced, and the reliability of power supply is improved.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 invention. In this specification, the schematic representations of the terms used above 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 invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An iron core clamping piece with an insulation structure for a distribution transformer comprises an upper clamping piece (11) and a lower clamping piece (12), wherein the upper clamping piece (11) and the lower clamping piece (12) are identical in structure and are composed of a left clamping piece (13) and a right clamping piece (14), an iron core (15) is installed between the left clamping piece (13) and the right clamping piece (14) and is connected with the left clamping piece (13) through a screw (16), the iron core clamping piece is characterized in that the iron core clamping piece comprises a clamping piece body (1), an insulation paper board (2) is installed on the inner side of the clamping piece body (1), a plurality of insulation cushion blocks (3) are longitudinally arranged in parallel on the inner side and the outer side of the insulation paper board (2), a plurality of cushion block holes (4) penetrate through the surface of the clamping piece body (1), the cushion block holes (4) are equal in number and correspond to the insulation cushion blocks (3) in position and shape, the insulation cushion, insulating cushion (3) of insulating cardboard (2) opposite side hug closely on the iron core piece in iron core (15) outside, and folder body (1) both ends are equipped with two first screw (5) respectively, and insulating cardboard (2) both ends are equipped with two second screw (6) respectively, pass second screw (6) and first screw (5) in proper order through screw rod (16) and link together folder body (1) and insulating cardboard (2).

2. A core clamp with insulation for a distribution transformer according to claim 1, characterized in that the thickness of the insulating paper sheet (2) is 1 mm.

3. A core clamp with insulating structure for distribution transformers according to claim 1, characterized in that said insulating spacer (3) has the shape of a rectangular parallelepiped.

4. A core clamp with insulation for a distribution transformer according to claim 3, characterized in that the width of the insulation block (3) is 40mm or 63 mm.

5. A core clamp with insulation for a distribution transformer according to claim 1, characterized in that the insulating cardboard (2) is smaller in size than the clamp body (1).

6. A core clamp with insulating structure for distribution transformers according to claim 1, characterized in that said core (15) is built up of core pieces stacked one above the other.

7. The core clamp with insulation for a distribution transformer according to claim 1, wherein said core clamp is used in a 10kV distribution power transformer.

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