JPH062647U - Transformer - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a transformer having a simple structure and a small size, and capable of fastening a content constituent part to a box body by a simple operation. [Structure] Screw hole 1 of seat member 14 fixed to tightening metal fitting 4
5, the content fixing bolt 6 is fitted and set upright.
Insulating member 1 fitted to a portion above nut 16 fitted to
Bottomed hole 1 of the cover member 19 in which 7 is fixed to the tank cover 5.
9a, and the box 3 is made to support the content forming part.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fastening structure for fixing an internal device of a transformer and a box housing the same.

[0002]

[Prior art]

 As a conventional transformer, there is a transformer in which a coil 3 and an iron core 2 are contained in a box 3 like an insulating oil-filled or gas-insulated transformer illustrated in FIGS. The transformers having such a box body 3 have vibration resistance so that the inner wall of the box body 3 may not be damaged by the inside components of the coil 1 and the iron core 2 due to vibration during transportation. In order to fix them between them. That is, a means for fastening between the fastening metal fitting 4 fastening the upper yoke of the iron core 2 and the tank cover 5 of the box body by using a plurality of content fixing bolts 6 is taken. Therefore, as shown in the drawing, the seat 7 is welded and fixed to the fastener 4. The bolt 6 for fixing the content is inserted through the insulating tube 8 into the through hole 7a provided in the upper plate portion of the seat 7. Then, as shown in the drawing, nuts 12 are fitted to the upper and lower surfaces of the seat 7 through the insulating seat 10 and washer 11, respectively, and the upper end of the bolt 6 projects from the seat 7 to a predetermined height. And fasten them so that they are electrically insulated.

Next, in order to fix the contents forming part to the box body 3, the contents forming part is put in the lower tank 9 of the box body 3 and the tank cover 5 is attached to the lower tank 9. At this time, the corresponding tip ends of the content fixing bolts 6 are made to project from a plurality of through holes formed at predetermined portions of the tank cover 5. Next, the cap nut 13 is fitted to each bolt 6, and the peripheral portion of each cap nut 13 that is in contact with the upper surface of the tank cover 5 is welded to be integrated. In this way, the contents forming part is fixed to the box body 3. Since the plurality of bolts 6 and the seat 7 are insulated from each other as described above, the leakage magnetic flux is leaked to the circuit composed of the bolt 6, the tightening metal fitting 4 having the seat 7, the bolt 6, and the tank cover 5. It is possible to prevent the circulating current from flowing due to the induced voltage.

[0004]

[Problems to be solved by the device]

 In the conventional transformer as described above, even if the content fixing bolt 6 is directly attached to the tightening metal fitting 4 of the content forming portion, the tightening metal fitting 4 has a rectangular tubular shape, and the fastening position of the bolt 6 is a position apart from the end portion. Since the holes for fastening the bolts 6 cannot be deburred after drilling, the holes for the bolts 6 cannot be actually drilled, and the bolts 6 are directly attached to the tightening fitting 4. I couldn't do it. For this reason, there has been a problem in that the seat 7 has to be welded to the tightening fitting 4 and the bolt 6 has to be attached thereto, which complicates the structure. In addition, in order to fix the bolt 6 for fixing the content to the seat 7, two nuts 12 must be used, and since a large force applied to the bolt 6 must be endured, the large nut 12 must be used. There is a problem that the operation of fastening the nut 12 is difficult and requires a large amount of force.

Furthermore, since the structure is welded to the seat 7 and attached to the fastening member 4, a corner is formed. For this reason, when a lead wire drawn from the coil 1 to the outside passes near the tightening fitting 4, the insulation distance between the seat 7 and the lead wire must be increased, and the box body 3 must be enlarged. Alternatively, in order to shorten the insulation distance, a shield plate having a smooth surface must be installed so as to cover the corners of the seat 7, so that there is a problem that the box body 3 must be enlarged.

In view of the above points, the present invention has an object to newly provide a transformer which has a simple structure, can be miniaturized, and can be fastened to a box body by a simple operation. .

[0007]

[Means for Solving the Problems]

 The transformer of the present invention is a transformer in which the box body and the internal component are fastened relative to each other.The seat member is fixed to the fastening metal fitting of the internal component, and the internal screw is fixed in the screw hole of the internal member. Fit the bolts upright, cover the part above the nut fitted to the contents fixing bolt with a flanged insulating member, and pass the part of the contents fixing bolt covered with the insulating member through the through hole of the tank cover. It is characterized in that it is configured to be inserted and supported in the bottomed hole of the cover member fixed to the tank cover.

[0008]

[Action]

 With the above configuration, the tank cover and its cover member support the portion of the upper portion of the nut of the contents fixing bolt attached to the seat member that is covered with the insulating member, and the inside configuration of the box body is supported. Prevent parts from moving back and forth, left and right, or up and down. Furthermore, the circulating current circuit is cut off by insulating the space between the content fixing bolt and the tank cover with an insulating member.

[0009]

【Example】

 Hereinafter, one embodiment of the transformer of the present invention will be described with reference to FIGS. 1 to 5, parts corresponding to those of the conventional example shown in FIGS. 6 and 7 are designated by the same reference numerals, and detailed description thereof will be omitted. In FIG. 1, which is a cross-sectional view showing the fastening portion between the box body and the inner component portion, 4 is a fastening metal fitting, 5 is a tank cover, 6 is a content fixing bolt, and 14 is a seat member.

As shown in FIG. 2, the seat member 14 is formed by forming a screw hole 15 in a round steel material along the central axis thereof, and further forming a round corner at the free end side. The bottom of the seat member 14 is placed at a predetermined position for mounting the fixed bolt 6 on the tightening metal fitting 4, the bottom peripheral corner of the seat member 14 is welded, and is fixed so as to be integrated with the tightening metal fitting 4. .

As described above, the contents forming part formed by installing the seat member 14 on the tightening fitting 4 is housed in the lower tank of the box body. Then, the content fixing bolt 6 is fitted into the screw hole 15 of the seat member 14 so that the tip portion of the bolt 6 projects a required height from the tank cover 5.

Next, the nut 16 is fitted to the bolt 6, and the nut 16 is fixed so that the upper end surface of the nut 16 is located below the lower surface of the tank cover 5 by the thickness of the flange a of the insulating member 17. To do. As a means for fixing the nut 16 at a predetermined position of the bolt 6, punching or a liquid lock agent may be used. Further, a so-called double nut type fixing means in which two nuts 16 are provided and these nuts are fastened to each other may be used. Alternatively, a hard lock nut in which the nut itself has a rotation preventing effect may be used.

Next, the insulating member 17 is put on the portion of the content fixing bolt 6 above the nut 16. The insulating member 17 is formed into a cylindrical shape with a collar 17a as shown in FIG. 3 by cutting a material having a strength capable of withstanding a predetermined compressive force such as a press board, a resin molded product, or a laminated product. It consists of

Next, the tank cover 5 is attached to the lower tank, and the content fixing bolts 6 to which the insulating members 17 are attached are inserted into the through holes 18 of the tank cover 5.

Next, the cover member 19 is attached to the bolt 6 with the insulating member 17 protruding above the tank cover 5. The cover member 19 is a cylindrical member as shown in FIGS. 4 and 5, and has a bottomed hole 19a in the bottom surface thereof. As shown in FIG. 1, the cover member 19 is placed on the tank cover 5 in a state where the bolt 6 with the cover member 19 is housed in the bottomed hole 19 a, and the cover member 19 is welded to the bottom peripheral portion of the cover member 19 to be integrated with the tank cover 5. Stick to. In addition, in this work, a gap of several millimeters is provided between the through hole 18 of the tank cover and the insulating member 17 so as to absorb the error from the standing position of the content fixing bolt 6. If the cover member 19 is previously fixed to 5, the bottomed hole 19a fits into the insulating member 17 without a gap, so that an assembly error cannot be absorbed. As described above, the cover member 19 is finally attached. If it is fixed to the tank cover 5, the assembling work can be facilitated.

In the transformer of the present embodiment configured as described above, the upper portion of the content fixing bolt 6 is supported by the bottomed hole 19a portion of the cover member 19 via the cylindrical insulating member 17. Further, the nut 16 fitted to the bolt 6 is pressed against the inner surface of the tank cover 5 via the brim 17a, and the contents constituting part is boxed by the shock during the transportation of the transformer or the force generated during the earthquake. It is intended to prevent the body 3 from rising. Further, the bolt 6 and the nut 16 work together to prevent the internal components from moving back and forth, left and right, or up and down due to a shock generated during transportation and a force generated during an earthquake. Further, the insulating member 17 covering the bolt 6 and the nut 16 withstands the compressive force applied thereto, insulates the portion 6 for fixing the content from the tank cover 5, and interrupts the circulating current circuit. It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various other configurations can be adopted without departing from the scope of the present invention.

[0017]

[Effect of device]

 As described in detail above, according to the transformer of the present invention, in the transformer in which the box body and the contents forming part are fastened relative to each other, the seat member is fixed to the tightening metal fitting of the contents forming part, The contents fixing bolt is fitted into the screw hole of the member to stand upright, the insulating member with a collar is covered on the part above the nut fitted to the contents fixing bolt, and the part of the contents fixing bolt covered with the insulating member is covered. Since it is configured to pass through the through hole of the tank cover and to be inserted and supported in the bottomed hole of the cover member fixed to the tank cover, the structure of the seat member is simplified, and its manufacture is not the conventional welded assembly structure. It can be cut from round steel, etc., and easily processed by using a lathe, etc., and its corners can be easily rounded, so its insulation performance can be improved, and manufacturing time can be shortened and processing labor can be reduced. There is an effect. In addition, it is possible to assemble the content fixing bolts to the seat member without the complicated work of using two nuts as in the past, and to assemble the bolts into the screw holes by a simple operation. There is.

Further, since only the insulating member is necessary as the component that constitutes the insulation for interrupting the circulating current circuit passing through the tightening metal fitting, the tank cover and the content fixing bolt, two washers and an insulating seat as in the conventional case are used. This has the effect of significantly reducing the number of parts compared to using two and one insulating cylinder.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of a transformer of the present invention.

FIG. 2 is a perspective view illustrating a seat member of the above embodiment.

FIG. 3 is a perspective view illustrating an insulating member of the above-described embodiment.

FIG. 4 is a front view illustrating the cover member of the above embodiment.

FIG. 5 is a bottom view illustrating the cover member of the above embodiment.

FIG. 6 is a schematic configuration diagram illustrating the configuration of a conventional transformer.

FIG. 7 is a vertical cross-sectional view of a main part of a content fixing bolt portion of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Coil 3 ... Box body 4 ... Tightening metal fitting 5 ... Tank cover 6 ... Content fixing bolt 14 ... Seat member 15 ... Screw hole 16 ... Nut 17 ... Insulating member 18 ... Through hole 19 ... Cover member

Claims (1)

[Scope of utility model registration request] 1. In a transformer in which a box body and a contents forming portion are fastened relative to each other, a seat member is fixed to a fastening metal fitting of the contents forming portion, and a contents fixing bolt is attached to a screw hole of the seat member. It is characterized in that it is configured to be fitted and erected, and a portion above the nut fitted to the content fixing bolt is inserted into and supported by a bottomed hole portion of a cover member fixed to the tank cover through an insulating member. A transformer.