JP5296471B2 - Automatic voltage regulator for power distribution - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an existing automatic voltage regulator for power distribution in which work for providing a protective plate to a viewing window through which a check of a tap position is greatly simplified. <P>SOLUTION: A bolt pass-through hole 312a is formed at a window frame 312 so as to correspond to window frame mounting tap holes 310a which are formed at a window frame mounting seat 310. The window frame is mounted to the automatic voltage regulator for power distribution which is mounted with inserting bolts 314 through the bolt pass-through holes in a state that the bolts 314 are inserted through two protective plate support members 350a, 350b which have bolt pass-through holes 350a1, 350b1 and protective plate mounting tap holes 350a2, 350b2. A protective plate 340 is mounted that has a bolt pass-through hole 340a which is formed so as to correspond to one of the protective plate mounting tap holes and rotatable around the axis of a protective plate supporting bolt 315a inserted into the bolt pass-through hole, and has a slit 340b which is locked by a protective plate supporting bolt 315b which is screwed with the other protective plate mounting tap hole. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to automatic voltage adjustment for power distribution provided with a tap position observation window with a protective plate.

  As shown in Patent Document 1, the automatic voltage regulator for power distribution includes a tap transformer, a load tap changer for performing tap switching of the tap transformer, and a tap position in conjunction with the load tap changer. It is equipped with a tap position indicator plate that displays mechanically, and is housed in the case in a state filled with insulating oil together with the filled insulating oil. During operation of the automatic voltage regulator for power distribution and inspection, At this time, a tap position viewing window is provided on the side of the case so that the tap position can be confirmed outside the case.

  As shown in FIGS. 4A and 4B, the conventional tap position viewing window 41 ′ of the automatic voltage regulator for power distribution includes a window frame mounting seat 410, a transparent member 411, a window frame 412, packings 413a and 413b, Consists of. The window frame mounting seat 410 is formed of a metal plate having a relatively large thickness in a circular ring shape, and a circular notch formed on the side surface of the case 2 with one circular flat surface facing the case 2. It is attached to the periphery of 2a by welding, and a plurality of window frame attaching tap holes 410a are formed on the other flat surface of the circle. The transparent member 411 is formed of an acrylic plate or the like in a circular shape, the window frame 412 is formed of a metal plate or the like in a circular ring shape, and the packings 413a and 413b are formed of a plate-like cork synthetic rubber material in a circular shape, Bolt through holes 412 a are formed in the window frame 412 so as to correspond to the tap holes 410 a formed in the window frame mounting seat 410. The window frame 412 has a packing 413 a, a transparent member 411, and a packing 413 b sequentially disposed in the window frame mounting seat 410, and a bolt 414 is inserted into a bolt through hole 412 a formed in the window frame 412. It is attached by screwing into the hole 410a and tightening.

  By the way, in recent years, the accident that the transparent member 411 of the tap position observation window 41 is cracked by flying objects and the problem that the inside cannot be confirmed because the insulating oil filled in the case is very dirty due to deterioration over time have been taken. There is an increasing need to attach protective plates to windows.

Therefore, as shown in FIGS. 5 (A) and 5 (B), the conventional tap position viewing window 41 with a protective plate is formed by erecting two protective plate supporting bolts 415 on the flat surface of the window frame 412 and performing welding or the like. The protective plate 440 in which the bolt through holes 440a and 440b are formed so as to correspond to the two bolts 415a and 415b is inserted into the protective plate support bolts 415a and 415b, tightened by the wing nuts 416a and 416b, respectively, and the window frame 412 It is attached and configured to cover the whole.
JP 2006-179680 A (FIG. 14)

  However, when the conventional tap position observation window 41 with a protective plate is applied to an existing automatic voltage regulator for power distribution, welding work on the site and on a power pole is required, which is very complicated. Further, when the conventional tap position observation window 41 with a protective plate is applied to the existing and newly manufactured automatic voltage regulator for power distribution, when the protective plate 440 is removed and the inside of the transparent member 411 is tried, Since it is necessary to completely remove the two wing nuts 416a and 416b from the bolts 415a and 415b and to remove the protection plate 440 from the bolts 415a and 415b, it takes time and effort to attach and detach the protection plate 440. Moreover, it is an operation performed on the utility pole, and there is a risk that the protective plate and the wing nut will be dropped.

  It is an object of the present invention to provide an existing automatic voltage regulator for power distribution that greatly simplifies the work of providing a protective plate on a tap position viewing window.

A first invention includes a transformer with a tap, a tap changer at the time of switching taps of the transformer with a tap, and a tap position display plate that mechanically displays a tap position in conjunction with the tap changer at the time of load. These are housed in the case in a state filled with insulating oil together with the filled insulating oil, and a tap position viewing window is provided on the side of the case so that the tap position can be confirmed from the outside of the case. The tapping position viewing window comprises a window frame mounting seat, a plate-shaped transparent member, and a plate-shaped window frame, and the window frame mounting seat is attached to the periphery of the notch formed on the side of the case. A window frame mounting tap hole is formed, a bolt through hole is formed in the window frame corresponding to the window frame mounting tap hole, and the window frame bolts the bolt with a transparent member interposed in the window frame mounting seat. For window frame mounting through the through hole Tsu screwed into flop hole intended for automatic voltage regulator power distribution which is mounted by tightening,
A protective plate that is rotatable along the flat surface of the transparent member so that a position covering the tap position viewing window and a position not covering the tap position viewing window can be selected;
A protection plate support bolt for supporting the protection plate is provided;
Two protective plate support members formed with bolt through holes through which bolts screwed into the window frame mounting tap holes and protective plate mounting tap holes into which the protective plate support bolts are screwed are formed. It is attached with the bolts screwed into the tapped holes for window frame mounting inserted,
A bolt through hole is formed corresponding to one of the two protective plate mounting tap holes, and can be rotated about the axis of the protective plate supporting bolt inserted through the bolt through hole, and also prevents natural fall. A protective plate formed with an arc-shaped cut to be locked by a protective plate supporting bolt screwed into the other of the two protective plate mounting tap holes so that the protective plate supporting bolt is connected to the protective plate mounting tap hole. It is made to attach by screwing together and fastening.

As described above, according to the first aspect of the present invention, the work for providing a protective plate on the conventional tap position viewing window is greatly reduced without performing welding work on the power pole for the existing automatic distribution voltage regulator. It can be simplified. In addition, the installation and removal of the protective plate can be greatly simplified for existing and new automatic voltage regulators for power distribution with tap position viewing windows with protective plates. Can be prevented. In addition, the tap position viewing window can be easily modified without affecting the screwed state of the bolt for tightening the window frame.

  FIG. 1A is a front view showing a main part of a first embodiment of an automatic voltage regulator for power distribution according to the present invention, and FIG. 1B is a cross-sectional view taken along line AA in FIG. The basic configuration of the tap position viewing window 21 with the protective plate shown in FIG. 1 is the same as the tap position viewing window shown in FIG. 4, and includes a window frame mounting seat 210, a transparent member 211, a window frame 212, a packing 213 a, 213b. The window frame attaching seat 210 is attached to the periphery of the notch 2a formed on the side surface of the case 2 by welding, and a plurality of window frame attaching tap holes 210a are formed. Bolt through holes 212 a are formed in the window frame 212 so as to correspond to the window frame mounting tap holes 210 a formed in the window frame mounting seat 210. The window frame 212 is attached by inserting a bolt 214 through the bolt through hole 212a, screwing it into the window frame attaching tap hole 210a, and tightening.

  Protection plate supporting bolts 215a and 215b are respectively attached to any two of the window frames 212, and bolt through holes 240a are formed corresponding to the protection plate supporting bolts 215a, and the bolt through holes 240a. The protective plate 240 is formed with an arc-shaped cut 240b that can be rotated about the axis of the protective plate supporting bolt 215a inserted through the protective plate and that is locked by the protective plate supporting bolt 215b so as to prevent natural fall. Are inserted into the protection plate supporting bolts 215a and 215b and fastened by wing nuts 216a and 216b, respectively.

  As shown in FIG. 3, the protection plate 240 is locked by the protection plate support bolt 215 b at a position covering the window frame 212 (transparent member 211) of the viewing window 21 when not in operation or during non-inspection. However, during operation and inspection, the wing nuts 216a and 216b can be turned by loosening them. Therefore, the protective plate 240 is rotated counterclockwise, and the window frame 212 (transparent member 211). The wing nut 216a is tightened at the position shown in FIG.

  In the present embodiment, in particular, the tap position observation window can be simply modified with respect to the existing automatic voltage regulator for power distribution provided with the conventional tap position observation window 41 '.

  FIG. 3A is a front view showing a main part of a second embodiment of the automatic voltage regulator for power distribution according to the present invention, and FIG. 3B is a cross-sectional view taken along line AA in FIG. The basic configuration of the tap position viewing window 31 with the protective plate shown in FIG. 4 is the same as the tap position viewing window shown in FIG. 5, and includes a window frame mounting seat 310, a transparent member 311, a window frame 312, a packing 313 a, 313b. The window frame mounting seat 310 is attached to the periphery of the notch 2a formed on the side surface of the case 2 by welding, and a plurality of window frame mounting tap holes 310a are formed. In the window frame 312, bolt through holes 312 a are respectively formed so as to correspond to the window frame mounting tap holes 310 a formed in the window frame mounting seat 310. The window frame 212 is attached by inserting a bolt 314 through the bolt through hole 312a, screwing it into the window frame attaching tap hole 310a, and tightening.

  Arbitrary two of the bolts 314 are respectively provided with protection plate support members 350a and 350b made of a rectangular plate. The protection plate support member 350a is formed with a bolt through hole 350a1 through which the bolt 314 is inserted and a protection plate attachment tap hole 350a2 into which the protection plate support bolt 315a is screwed, and is arranged in the longitudinal direction for protection. The plate support member 350b is formed with a bolt through hole 350b1 through which the bolt 314 is inserted and a protection plate mounting tap hole 350b2 into which the protection plate support bolt 315b is screwed and arranged in the longitudinal direction.

  The protection plate support member 350a is disposed on the window frame 212, and is attached by inserting the bolt 314 through the bolt through hole 350a1, screwing the bolt 314 into the window frame attachment tap hole 310a, and tightening the protection plate support member. 350b is disposed on the window frame 312, and is attached by inserting the bolt 314 removed at the site through the bolt through hole 350b1, screwing it into the window frame attaching tap hole 310a, and tightening it.

  Protection plate support bolts 315a and 315b are screwed into the protection plate mounting tap holes 350a2 and 350b2, respectively, and bolt through holes 340a are formed corresponding to the protection plate support bolts 315a. A protection in which an arc-shaped notch 340b is formed that can be rotated about the axis of the protection plate support bolt 315a inserted through the hole 340a and is locked by the protection plate support bolt 315b so as to prevent natural fall. The plate 340 is attached by tightening with the protection plate supporting bolts 315a and 315b.

  As shown in FIG. 3, the protection plate 340 is locked by a protection plate support bolt 315 b at a position that covers the window frame 312 (transparent member 311) of the viewing window 31 when not in operation or when not inspected. However, during operation and inspection, the protective plate support bolts 315a and 315b can be turned by loosening them. Therefore, the protective plate 340 is rotated counterclockwise, and the window frame 312 (transparent The member 311) is tightened by the protection plate supporting bolt 315a at the position shown in FIG.

  In the present embodiment, in particular, this tap without affecting the screwed state of the bolt 314 for tightening the window frame 312 with respect to the existing automatic voltage regulator for power distribution provided with the conventional tap position observation window 41 ′. A simple modification of the position window is sufficient.

  In each of the above embodiments, the protective plate is locked by a bolt, but a simple bar may be used instead of the bolt.

  In each of the above embodiments, the protective plate is formed with a bolt through hole and a cut. However, the protective plate may be supported by a single protective plate support bolt without the cut.

  The protection plate of the present invention has a configuration in which two protection plate support bolts are mounted in a standing state on a flat surface of a window frame with respect to a newly manufactured automatic voltage regulator for power distribution provided with a conventional tap position viewing window. Can be applied.

(A) is a front view which shows the principal part of 1st Embodiment of the automatic voltage regulator for power distribution which concerns on this invention, (B) is an AA sectional view taken on the line in FIG. It is a front view which shows the state which rotated the protection board of FIG. (A) is a front view which shows the principal part of 2nd Embodiment of the automatic voltage regulator for power distribution which concerns on this invention, (B) is an AA sectional view taken on the line of AA of (A). (A) is a front view which shows the principal part of the automatic voltage regulator for power distribution which has the conventional tap position observation window, (B) is an AA sectional view taken on the line in FIG. (A) is a front view which shows the principal part of the automatic voltage regulator for power distribution which has a tap position viewing window with the conventional protective plate, (B) is an AA sectional view taken on the line in FIG.

2 Case 2a Notch 310 Window frame mounting seat 310a Window frame mounting tap hole 311 Transparent member 312 Window frame 312a Bolt through hole 314 Bolt 350a, 350b Protection plate support member 350a1, 350b1 Bolt through hole 350a2, 350b2 Protection plate mounting tap hole

Claims (1)

A transformer with a tap, a tap changer at the time of switching the tap of the transformer with a tap, and a tap position display plate that mechanically displays the tap position in conjunction with the tap changer at the time of loading, these Is stored in the case in a state filled with insulating oil together with the filled insulating oil, and a tap position viewing window is provided on a side surface of the case so that the tap position can be confirmed from the outside of the case. The window comprises a window frame mounting seat, a plate-shaped transparent member, and a plate-shaped window frame, and the window frame mounting seat is mounted on the periphery of a notch formed on the side of the case for mounting a plurality of window frames. A tapped hole is formed, a bolt through hole is formed in the window frame in correspondence with the tapped hole for attaching the window frame, a transparent member is interposed in the window frame mounting seat, and the window frame is inserted through the bolt through hole. To the tapped holes for window frame mounting An automatic voltage regulator power distribution which is attached by fastening is engaged,
A protective plate that is rotatable along the flat surface of the transparent member so that a position covering the tap position viewing window and a position not covering the tap position viewing window can be selected;
A protection plate support bolt for supporting the protection plate is provided;
Two protective plate support members formed with bolt through holes through which bolts screwed into the window frame mounting tap holes and protective plate mounting tap holes into which the protective plate support bolts are screwed are formed. It is attached with the bolts screwed into the tapped holes for window frame mounting inserted,
A bolt through hole is formed corresponding to one of the two protective plate mounting tap holes, and can be rotated about the axis of the protective plate supporting bolt inserted through the bolt through hole, and also prevents natural fall. A protective plate formed with an arc-shaped cut to be locked by a protective plate supporting bolt screwed into the other of the two protective plate mounting tap holes so that the protective plate supporting bolt is connected to the protective plate mounting tap hole. Automatic voltage regulator for power distribution installed by screwing and tightening each.

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