JP2012075239A - Enclosed-type metal switch gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability during maintenance and inspection by opening the back side of a housing without removing a back panel.SOLUTION: There is provided an enclosed-type metal switch gear in which a housing 1 comprises a floor panel 2, a side panel 3, a ceiling panel 4, back members 10a, 10b, and a front door. In the switch gear, a pair of groove-shaped rails 12 formed of a first rail 12a extending from the floor panel 2 to the ceiling panel 4 and a second rail 12b fixed at a predetermined distance is provided on both sides of the back side of the housing 1, such that both sides of the back members 10a, 10b movably fit into the pair of rails 12.

Description

  Embodiments of the present invention relate to a metal closed switchgear that can improve workability during maintenance inspection.

  As shown in FIG. 7, the metal closed type switchgear accommodates a storage device such as a circuit breaker in the box 1 to control and protect the power system. The box 1 includes a floor plate 2, side plates 3 on both sides, a ceiling plate 4, back plates 5a and 5b that are divided into upper and lower parts, and a front door (not shown). Handles 6a and 6b are attached to the back plates 5a and 5b, respectively, so that they are portable. Moreover, it fixes with the some volt | bolt 7a, 7b (for example, refer patent document 1).

JP 2008-283734 A

  The above-described conventional metal closed switchgear has the following problems. During maintenance and inspection of the storage device and cable connection work, the back plates 5a and 5b are removed and the back side of the box 1 is opened. The removed back plates 5a and 5b are temporarily placed in a predetermined storage area of the electric room. For this reason, a storage area must be secured in the electric room, and the back plates 5a and 5b have to be transported to the storage area.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a metal closed type switchgear that can open the back side without removing the back plate and improve workability.

  In order to achieve the above object, a metal closed switchgear according to an embodiment is a metal closed switchgear in which a box is constituted by a floor plate, a side plate, a ceiling plate, a back member, and a front door, and the box A pair of rails extending from the floor plate to the ceiling plate are provided on both sides on the back side of the back side, and both sides of the back member are fitted into the pair of rails so as to be movable.

The figure which shows the structure of the box of the metal closed type switchgear which concerns on Example 1 of this invention. The principal part sectional drawing explaining the operation | movement procedure of the metal closed type switchgear which concerns on Example 1 of this invention. The principal part sectional drawing explaining the operation | movement procedure of the metal closed type switchgear which concerns on Example 1 of this invention. The principal part sectional drawing which shows the structure of the box of the metal closed type switchgear which concerns on Example 2 of this invention. The principal part sectional drawing which shows the structure of the box of the metal closed type switchgear which concerns on Example 3 of this invention. The principal part sectional drawing which shows the structure of the box of the metal closed type switchgear which concerns on Example 3 of this invention. The perspective view which shows the structure of the box body of the conventional metal closed type switchgear.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a metal closed switchgear according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram illustrating a configuration of a box body of a metal closed switchgear according to a first embodiment of the present invention, and FIGS. 2 and 3 illustrate work procedures of the metal closed switchgear according to the first embodiment of the present invention. It is principal part sectional drawing demonstrated. In addition, in each figure, the same code | symbol was attached | subjected about the component similar to the past.

  As shown in FIG. 1 (a) in perspective, a box 1 for storing a storage device such as a circuit breaker is divided into a plate-like floor plate 2 made of steel plates, side plates 3 on both sides, a ceiling plate 4 and vertically. The rear plates 10a and 10b, and a front door (not shown). Recessed hook portions 11a and 11b are provided at the center portions of the back plates 10a and 10b, respectively.

  As shown in FIG. 1B, which is a cross-sectional view, the back plates 10a and 10b can move in a pair of rails 12 made of steel plates, insulators, and the like provided on both sides in the width direction. The rail 12 is composed of a first rail plate 12a extending from the floor plate 2 to the ceiling plate 4 and a second rail plate 12b fixed to the inside of the box body 1 at a predetermined interval. That is, the rail 12 has a groove shape, and both sides of the back plates 10a and 10b are fitted into the groove so that the rail 12 is movable.

  An intermediate plate 13 having an L-shaped cross section is provided at an intermediate portion in the vertical direction in the rail 12. Further, the height of the intermediate plate 13 is lower than the groove width of the rail 12, so that one piece of the back plate 10a (10b) can move through the gap between the top of the intermediate plate 13 and the rail plate 12a.

  Next, the work procedure at the time of maintenance inspection will be described with reference to FIG.

  FIG. 2A shows a state in which the back side is closed by the back plates 10a and 10b. And when opening an upper part, as shown in FIG.2 (b), it has the hook part 11a of the backplate 10a, and horizontally moves the backplate 10a in the direction out of the box 1. As shown in FIG. Next, as shown in FIG. 2C, the upper portion can be opened by moving over the L-shaped portion of the intermediate plate 13 and moving the back plate 10a downward. Note that the movement of the back plate 10a can be facilitated by using, for example, a suction jig having a removable permanent magnet fixed thereto.

  In the closed state of FIG. 2A, when a plurality of locations on the back plate 10a are fixed with a plurality of bolts or padlocks (not shown), the back plate 10a can be firmly fixed and can withstand an increase in internal pressure. Bolts and padlocks are defined as fixing members that fix the back plate 10a.

  When the lower part is opened, the back plate 10b is moved horizontally from the closed state in FIG. 3A to the outside of the box 1 as shown in FIG. 3B. Next, as shown in FIG. 3C, if the back plate 10b is moved upward and placed on the intermediate plate 13, the lower portion can be opened. In addition, if back plate 10a, 10b is fixed to the box 1 side with a volt | bolt, it can prevent fall.

  Here, the back plates 10a and 10b are defined as back members provided on the back side of the box 1.

  According to the metal closed type switchgear of the first embodiment, the pair of rails 12 are attached to both sides of the back of the box body 1 and the back plates 10a and 10b that move freely in the rails 12 are provided. Without removing the face plates 10a, 10b, the upper or lower portion of the box 1 can be opened, and workability can be improved.

  In the said Example 1, although the backplates 10a and 10b were divided into the ceiling side and the floor side and explained, when there is a space on the ceiling side and the floor side outside the box 1, the back plate is one piece, It can be moved up and down.

  Next, a metal closed switchgear according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of the main part showing the configuration of the box body of the metal closed switchgear according to the second embodiment of the present invention. The second embodiment differs from the first embodiment in that the back member is a shutter. In FIG. 4, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, shutters 14 a and 14 b that are movable in the vertical direction from the ceiling plate 4 to the intermediate plate 13 and from the intermediate plate 13 to the floor plate 2 are provided in the rail 12. The winding portions 14a1 and 14b1 are on the ceiling plate 4 side in the upper part and on the intermediate plate 13 side in the lower part. The shutters 14a and 14b can be firmly fixed by tightening and fixing with a plurality of bolts of a fixing member (not shown).

  Here, the shutters 14 a and 14 b are defined as back members provided on the back side of the box 1.

  According to the metal closed switchgear of the second embodiment, the same effect as that of the first embodiment can be obtained.

  Next, a metal closed switchgear according to a third embodiment of the present invention will be described with reference to FIGS. 5 and 6 are cross-sectional views of the main part showing the configuration of the box body of the metal closed switchgear according to the third embodiment of the present invention. The third embodiment differs from the second embodiment in the position where the shutter is attached. 5 and 6, the same components as those in the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the winding portions 14 a 1 and 14 b 1 of the shutters 14 a and 14 b are provided on the ceiling plate 4 side and the floor plate 2 side, and the shutters 14 a and 14 b are moved to the intermediate plate 13.

  Further, as shown in FIG. 6, the winding portion 15 a of the shutter 15 is provided on the ceiling plate 4 side and moves to the floor plate 2.

  According to the metal closed switchgear of the third embodiment, the same effect as that of the second embodiment can be obtained.

  In the embodiment as described above, the rear side member constituting the box is provided with a pair of rails so as to be movable in the vertical direction, so that the rear side is opened without removing the rear member. It is possible to improve workability during maintenance inspections and cable connections.

  Several embodiments have been described above, but these embodiments are merely given as examples and are not intended to limit the scope of the present invention. Indeed, the novel devices described herein may be embodied in a variety of other forms, and various omissions may be made in the form of devices described herein without departing from the spirit or spirit of the invention. Replacements and changes may be made. The appended claims and their equivalents are intended to include such forms or modifications as would fall within the scope and spirit or spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Box 2 Floor board 3 Side board 4 Ceiling board 5a, 5b, 10a, 10b Back board 6a, 6b Handle 7a, 7b Bolt 11a, 11b Hook part 12 Rail 12a First rail board 12b Second rail board 13 Middle Plate 14a, 14b, 15 Shutter 14a1, 14b1, 15a Winding part

Claims (6)

It is a metal closed type switchgear in which a box is composed of a floor panel, side panel, ceiling panel, rear member, front door,
Provide a pair of rails extending from the floor plate to the ceiling plate on both sides of the back side of the box,
A metal closed type switchgear characterized in that both sides of the back member are fitted into the pair of rails so as to be movable.   2. The metal closed switchgear according to claim 1, wherein an intermediate plate is provided at an intermediate portion of the pair of rails, and the back member is divided into two parts, the ceiling plate side and the floor plate side.   3. The metal closed switchgear according to claim 1, wherein the back member is a plate-like back plate.   3. The metal closed switchgear according to claim 1, wherein the back member is a shutter, and a winding portion is fixed to the ceiling plate side and the intermediate plate side.   3. The metal closed switchgear according to claim 1, wherein the back member is a shutter, and winding portions are fixed to the ceiling plate side and the floor plate side.   The metal closed switchgear according to any one of claims 1 to 5, wherein a back side of the box is closed by the back member, and the back member is fixed by a fixing member.

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