Limiting ox horn cushion block at external transposition position of large transformer coil

Abstract

The utility model relates to the technical field of transformer production and manufacturing, in particular to a large transformer coil external transposition position limiting ox horn cushion block which comprises an ox horn cushion block body which is movably inserted above an outer supporting strip body. A coil body penetrates through the upper part of the outer supporting strip body on the opposite side of the adjacent ox horn cushion block bodies; the limiting bump is arranged on the lower surface of the large head of the ox-horn-shaped cushion block body; the number of the limiting protruding blocks is two. The ox horn cushion block solves the problems that the ox horn cushion block is easy to loosen after being installed, the fixing operation is tedious, and the workload is large.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer production and manufacturing, in particular to a limiting horn pad at the external transposition position of a large transformer coil. Background Art

[0002] In order to improve the processability of coil manufacturing, reduce eddy current loss, and improve the short-circuit resistance of windings, more and more manufacturers use transposed conductors to wind coils, and the cross-gear transposition of transposed conductors will inevitably encounter the problem of conductor climbing. At present, the safer approach is to use arc-shaped and locust-shaped pads made of laminated paperboard to guide the transposed conductors to transition slowly, and then process the large end of the wedge into a slope consistent with the angle of the conductor transposition "S" bend, and pad the gap formed between the transposed "S" bend and the upper and lower oil channels, so that the entire coil becomes a solid entity in the radial and axial directions, thereby achieving the purpose of short-circuit impact resistance. Because the pads processed by the above method resemble horns, they are figuratively called "horn pads" in the industry, and horn pads are used to fill the transposition of large transformer coils.

[0003] At present, the transformer insulation coil transposition horn pads are made of cardboard glued, dried and trimmed many times, and the edges are smooth. In order to prevent the external horn pads from being displaced by the vibration and short-circuit force during the operation of the transformer, shrink bands are generally used to tie bamboo buckles to fix the coil external horn pads. However, the horn pads are not designed with corresponding clamping and positioning structures when connected to the external support bars, which makes them easy to loosen after being tied. The fixing operation is cumbersome and the workload is large. Therefore, a large transformer coil external transposition limit horn pad is needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a limiting horn pad at the external transposition of a large transformer coil, which has the advantages of improving the connection stability between the horn pad and the external support bar and facilitating positioning and installation, and solves the problems that the horn pad is easy to loosen after installation and the fixing operation is cumbersome and labor-intensive.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a horn pad for limiting the transposition of the coil outside a large transformer, comprising a horn pad body, wherein the horn pad body is movably inserted above the outer support bar body, and a coil body passes through the outer support bar body on the opposite side of the adjacent horn pad body, and further comprising: a limiting protrusion;

[0006] The limiting protrusion is arranged on the lower surface of the big end of the horn pad body;

[0007] Among them, the number of the limiting protrusions is two.

[0008] When using a horn pad for limiting the external transposition of a large transformer coil in the technical solution, when installing the horn pad for limiting the external transposition of a large transformer coil, align the outer limiting protrusions at the big heads of the two horn pad bodies, and make the two horn pad bodies a group, and directly clamp the opposite sides of the two limiting protrusions on the outer support bar body, and use the same method to install multiple groups of pads on the outer support bar body, and clamp the coil body on the outer support bar body on the opposite side of the adjacent pads, so that the coil body is clamped by the horn pad, and after the coil body is clamped by the horn pad, the horn pad body outside the coil body is fixed by tying the bamboo buckle with a shrink belt, thereby fixing the coil body to the horn pad body.

[0009] Preferably, the coil body comprises an insulating skin and a wire core, the insulating skin is coated on the outside of the wire core, and two sides of the coil body are respectively in contact with the horn pad body but not fixedly connected.

[0010] By covering the outer side of the wire core with an insulating skin, the wire core is protected by the insulating skin, and the two sides of the coil body are respectively in contact with the horn pad body but not fixedly connected, thereby facilitating the disassembly and assembly of the coil body.

[0011] Preferably, the ox-horn pad block body is laminated with wood pulp insulation paper, cotton fiber paper and cotton cloth, and the thickness of the ox-horn pad block body is one quarter of the width of the coil body.

[0012] By setting the thickness of the horn pad body to one-fourth of the width of the coil body, the distance between opposite sides of a group of adjacent horn pads can be determined when the horn pad body is installed, thereby facilitating the insertion operation of the coil body.

[0013] Preferably, the distance between the two opposite sides of the limiting protrusions matches the width of the outer support bar body, and the heights of the two limiting protrusions are both smaller than the thickness of the outer support bar body.

[0014] By matching the distance between the opposite sides of the two limiting protrusions with the width of the outer support bar body, it is convenient to clamp the horn pad body on the outer support bar body through the limiting protrusions. At the same time, the height of the two limiting protrusions is smaller than the thickness of the outer support bar body, thereby avoiding the limit protrusions being too high during installation, resulting in a large gap at the connection between the horn pad body and the outer support bar body.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model provides a limiting protrusion, and the limiting protrusion is arranged on the lower surface of the big head of the horn pad body. At the same time, there are two limiting protrusions. When installing, the outer limiting protrusions at the big heads of the two horn pad bodies are aligned, and the two horn pad bodies are made into a group, and the two limiting protrusions are directly clamped on the outer support bar body on the opposite sides, and multiple groups of pads are installed on the outer support bar body in the same way, and the coil body is clamped on the outer support bar body on the opposite side of the adjacent pads, so that the coil body is clamped by the horn pad, and after the horn pad is clamped on the coil body, the horn pad body outside the coil body is fixed by tying the bamboo joint buckle with a shrink band, so as to fix the coil body to the horn pad body, and ensure that the position of the horn pad body at the external transposition position of the coil body is reliably fixed and does not move, and is not affected by vibration and short-circuit force during transformer operation, so as to achieve the effect of improving the connection stability between the horn pad and the outer support bar and facilitating positioning and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0019] Figure 3 This is a schematic diagram of the main structure of the horn pad of the utility model;

[0020] Figure 4 For the utility model Figure 3 Schematic diagram of the structure at the enlarged point.

[0021] In the figure: 1. Coil body; 2. Horn pad body; 3. External support bar body; 4. Limiting protrusion. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, an embodiment of the utility model provided is: a horn pad for limiting the transposition of the external transposition of a large transformer coil, comprising a horn pad body 2, the horn pad body 2 is movably inserted above the outer support bar body 3, the coil body 1 passes through the outer support bar body 3 on the opposite side of the adjacent horn pad body 2, and also includes a limiting protrusion 4;

[0025] Specifically, the limiting protrusion 4 is arranged on the lower surface of the large end of the horn pad body 2;

[0026] There are two limiting protrusions 4 .

[0027] By setting a limiting protrusion 4 and arranging the limiting protrusion 4 on the lower surface of the big head of the horn pad block body 2, at the same time, there are two limiting protrusions 4. During installation, the outer limiting protrusions 4 at the big heads of the two horn pad block bodies 2 are aligned, and the two horn pad block bodies 2 are made into a group, and the two limiting protrusions 4 are directly clamped on the opposite sides of the outer support bar body 3, and multiple groups of pads are installed on the outer support bar body 3 in the same way, and the coil body 1 is clamped on the outer support bar body 3 on the opposite side of the adjacent pads, so that the coil body 1 is clamped by the horn pad. After the horn pad is clamped on the coil body 1, the horn pad body 2 outside the coil body 1 is fixed by tying the bamboo joint buckle with a shrink band, thereby fixing the coil body 1 with the horn pad body 2, which can ensure that the position of the horn pad body 2 at the external transposition of the coil body 1 is reliably fixed and not moved, and is not affected by vibration and short-circuit force during transformer operation, thereby achieving the effect of improving the connection stability between the horn pad and the outer support bar and facilitating positioning and installation.

[0028] Preferably, the coil body 1 includes an insulating skin and a wire core, the insulating skin is coated on the outside of the wire core, and two sides of the coil body 1 are respectively in contact with the horn pad body 2 but not fixedly connected.

[0029] By covering the outer side of the wire core with an insulating skin, the wire core is protected by the insulating skin, so that the two sides of the coil body 1 are respectively in contact with the horn pad body 2 but not fixedly connected, thereby facilitating the disassembly and assembly of the coil body 1.

[0030] Preferably, the ox-horn pad block body 2 is laminated with wood pulp insulation paper, cotton fiber paper and cotton cloth, and the thickness of the ox-horn pad block body 2 is one quarter of the width of the coil body 1 .

[0031] By setting the thickness of the horn pad body 2 to one-fourth of the width of the coil body 1 , the distance between opposite sides of an adjacent group of horn pads 2 can be determined when installing the horn pad body 2 , thereby facilitating the insertion operation of the coil body 1 .

[0032] Preferably, the distance between the two limiting protrusions 4 on opposite sides matches the width of the outer support bar body 3 , and the heights of the two limiting protrusions 4 are both smaller than the thickness of the outer support bar body 3 .

[0033] By matching the distance between the opposite sides of the two limiting protrusions 4 with the width of the outer support bar body 3, it is convenient to clamp the horn pad body 2 on the outer support bar body 3 through the limiting protrusions 4. At the same time, the heights of the two limiting protrusions 4 are both smaller than the thickness of the outer support bar body 3, thereby avoiding the limiting protrusions 4 being too high during installation, resulting in a large gap at the connection between the horn pad body 2 and the outer support bar body 3.

[0034] When installing the limiting horn pads at the external transposition of the coil of a large transformer, align the outer limiting protrusions 4 at the big heads of the two horn pad bodies 2, and make the two horn pad bodies 2 a group, and directly clamp the opposite sides of the two limiting protrusions 4 on the outer support bar body 3, and use the same method to install multiple groups of pads on the outer support bar body 3, and clamp the coil body 1 on the outer support bar body 3 on the opposite side of the adjacent pads, so as to clamp the coil body 1 through the horn pads, and after the coil body 1 is clamped by the horn pads, fix the horn pad body 2 outside the coil body 1 by tying the bamboo buckle with a shrink band, so as to fix the coil body 1 to the horn pad body 2.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A horn pad for limiting the transposition of the coil outside a large transformer, comprising a horn pad body (2), wherein the horn pad body (2) is movably inserted above an outer support bar body (3), and a coil body (1) passes through the outer support bar body (3) on the opposite side of the adjacent horn pad body (2), characterized in that: Also includes: A limiting protrusion (4) is arranged on the lower surface of the large end of the horn pad body (2); There are two limiting protrusions (4).

2. The large transformer coil external transposition limiting horn pad according to claim 1 is characterized in that: The coil body (1) comprises an insulating skin and a wire core, wherein the insulating skin is coated on the outside of the wire core, and two sides of the coil body (1) are respectively in contact with the horn pad body (2) but are not fixedly connected.

3. The large transformer coil external transposition limiting horn pad according to claim 1, characterized in that: The ox-horn pad block body (2) is laminated with wood pulp insulation paper, cotton fiber paper and cotton cloth, and the thickness of the ox-horn pad block body (2) is one quarter of the width of the coil body (1).

4. The large transformer coil external transposition limiting horn pad according to claim 1, characterized in that: The distance between the two limiting protrusions (4) on opposite sides matches the width of the outer support bar body (3), and the heights of the two limiting protrusions (4) are both smaller than the thickness of the outer support bar body (3).

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