JP2016220486A - Switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switchgear having a housing structure in which external cable lead-in is facilitated and work time including preparation before installation and recovery work can be shortened.SOLUTION: A switchgear includes a floor plate 13 surrounding a cable chamber 3, and an opening 17 over a side wall 15 on the back side via no frame. An external cable 6 can be drawn inside the cable chamber 3 only by removing an L-shaped cover 18 covering this opening 17. Moreover, after the external cable 6 is connected to a terminal in the cable chamber 3, work time including preparation before installation and recovery work can be shortened since installation work is completed only by mounting the L-shaped cover 18.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a casing structure of a switchgear provided with a metal closed casing.

  The inside of the switchgear housing is divided into a cable room, a circuit breaker room, a control room, etc., and each room has a bus or branch conductor, a vacuum circuit breaker, a relay, or a measuring instrument for measuring current and voltage. Containers are stored. The terminals arranged in the cable room are connected to an external cable laid on an indoor floor surface or an outdoor ground surface in order to supply electric power from a substation or the like.

  When a new switchgear is installed, the external cable is drawn into the housing after the switchgear is installed, but this work is not particularly problematic due to the structure of the housing. On the other hand, when the existing switchgear is renewed, only the switchgear is renewed, and the external cable is diverted from the existing one, the external cable after removing the switchgear is standing from the cable pit, In the conventional case structure, it takes time to draw the case into the case.

  As a housing structure for drawing an existing external cable, Patent Document 1 describes that as shown in FIG. 14, when moving the housing in the horizontal direction along the floor for installation, it interferes with the external cable. There has been proposed a switchgear in which a widthwise frame 30 that may be removed is removed from a normal position and temporarily fixed with a bolt to a frame fixing portion 32 that does not affect the cable lead-in portion 31.

  Further, as shown in FIG. 15, Patent Document 2 includes a first frame 33 and a second frame 34 that are divided into two in the front-rear direction at a vertical surface B portion passing through an opening A for cable insertion. The case to be displayed is presented. Furthermore, in Patent Document 3, as shown in FIG. 16, a switchgear provided with an open passage 36 for moving the power cable to the outside of the box 35 by moving the box 35 in the horizontal direction is presented. Yes.

Japanese Patent Application Laid-Open No. 2011-167022 JP 2010-213397 A Japanese Patent No. 5547240

  In the case structure shown in Patent Literature 1 to Patent Literature 3, an opening is secured by removing a frame, a cover, etc. as a preparation for drawing an external cable, but there are many parts to be removed. For this reason, although the operation | work which draws an outside line cable in a housing | casing becomes easy, there existed a problem that the preparation for it and the restoration operation | work for returning to an original state required time.

  Specifically, in Patent Document 1, it is necessary to remove the back cover and the width direction frame and temporarily fix the removed width direction frame at a position where it does not interfere with the power cable. In Patent Document 2, the casing is separated when the external cable is pulled in, and the casing on the back surface side is removed. This casing on the back surface side is a frame having an L-shaped cross section with a bolt or welding or the like. It is glued and has a weight and is not easy to attach and detach. In Patent Document 3, it is necessary to remove the lower reinforcing member 37, the front reinforcing member 38 and the reinforcing plate 39 in order to form the open passage 36.

  The present invention has been made to solve the above-described problems, and is capable of easily drawing an external cable and shortening the work time including preparation and restoration work before installation. The object is to obtain a body-structured switchgear.

  The switchgear according to the present invention is a switchgear having a cable chamber in which a top plate, a floor plate, and a casing having side walls supported by a frame are provided, and a terminal connected to an external cable is disposed inside the casing. The housing has an opening in which the floor opening provided on the floor plate surrounding the cable chamber and the back opening provided on the back side wall surrounding the cable chamber are integrated without a frame. A cover having an L-shaped cross section that covers the opening is detachably attached, and a part of the floor surface opening is opened as a lead-in portion of the external cable in a state where the cover is attached.

  According to the switchgear according to the present invention, since the opening that does not include the frame is provided across the floor plate surrounding the cable chamber and the side wall on the back side, it is only necessary to remove the L-shaped cover that covers the opening. The external cable can be easily pulled into the cable room, and after the external cable is connected to the terminal in the cable room, the installation work can be completed simply by attaching the cover. It is possible to shorten the working time.

It is sectional drawing which looked at the switchgear which concerns on Embodiment 1 of this invention from the side surface. It is the front view and bottom view which looked at the switchgear concerning Embodiment 1 of the present invention from the back. It is the side view, front view, and bottom view which show the L-shaped cover of the switchgear which concerns on Embodiment 1 of this invention. It is a figure explaining the installation procedure of the switchgear which concerns on Embodiment 1 of this invention. It is a bottom view which shows the example of another L-shaped cover of the switchgear which concerns on Embodiment 1 of this invention. It is a bottom view which shows the switchgear which concerns on Embodiment 2 of this invention. It is a figure explaining the installation procedure of the switchgear which concerns on Embodiment 2 of this invention. It is the front view and bottom view which looked at the switchgear concerning Embodiment 3 of the present invention from the back. It is the side view, front view, and bottom view which show the metal frame which comprises the L-shaped cover of the switchgear which concerns on Embodiment 3 of this invention. It is the side view and front view which show the metal plate which comprises the L-shaped cover of the switchgear which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the L-shaped cover of the switchgear which concerns on Embodiment 3 of this invention. It is a figure explaining the installation procedure of the switchgear which concerns on Embodiment 3 of this invention. It is a figure which shows the state at the time of the inspection of the switchgear which concerns on Embodiment 3 of this invention. It is a figure explaining the structure of the conventional switchgear. It is a figure explaining the structure of another conventional switchgear. It is a figure explaining the structure of another conventional switchgear.

Embodiment 1 FIG.
Hereinafter, a switchgear according to Embodiment 1 of the present invention will be described with reference to the drawings. 1 is a cross-sectional view of the switchgear according to the first embodiment as viewed from the side, FIG. 2A is a front view of the switchgear according to the first embodiment as viewed from the back, and FIG. FIG. 3A is a side view showing the L-shaped cover of the switchgear according to the first embodiment, FIG. 3B is a front view, and FIG. 3C is a bottom view. In addition, in each figure, the same code | symbol is attached | subjected to the same and an equivalent part.

  The switchgear according to the first embodiment includes a metal closed casing 1 as shown in FIG. The casing 1 uses metal frames 11 a, 11 b, 11 c, 11 d... (Generally called the frame 11) on each side, and plate materials such as the top plate 12, the floor plate 13, the side wall 15, and the partition wall 16. It is supported by the frame 11.

  The inside of the housing 1 is partitioned by a partition wall 16, and the circuit breaker chamber 2 in which a vacuum circuit breaker (not shown) is arranged in the front (left side in FIG. 1), and the rear (right side in FIG. 1). A cable chamber 3 in which terminals (not shown) connected to the external cable are arranged is provided. An open door 14 is provided in the front breaker chamber 2. Note that the configuration of the switchgear according to the first embodiment is not limited to the example shown in FIG. 1, and the number and arrangement of the frames 11 and the partition walls 16 can be changed as appropriate.

  In the housing 1, the floor opening 17 a provided in the floor plate 13 surrounding the cable chamber 3 and the back opening 17 b provided in the back side wall 15 surrounding the cable chamber 3 are integrated without the frame 11. It has an opening 17 having an L-shaped cross section. That is, the housing 1 has a structure without a frame in the width direction below the back surface.

  As shown in FIG. 2A, an L-shaped cover 18 having an L-shaped cross section that covers the opening 17 is detachably attached to the back surface of the housing 1 by a plurality of bolts 4. As shown in FIG. 2B, a part of the floor surface opening 17 a is opened as the cable lead-in portion 5 in a state where the L-shaped cover 18 is attached. As shown in FIG. 3A, the L-shaped cover 18 is processed into an L shape when viewed from the side, and serves as a frame. Further, as shown in FIG. 3B, the L-shaped cover 18 has a plurality of bolt holes 18a along the outer periphery thereof.

  As a switchgear installation procedure according to the first embodiment, a case where the existing external cable 6 is pulled into the switchgear will be described with reference to FIGS. 4 (a) to 4 (e). In FIG. 4, arrows A and C indicate the moving direction of the L-shaped cover 18, and arrow B indicates the moving direction of the housing 1. The external cable 6 is launched from a cable pit (not shown) installed on the floor surface where the switchgear is installed.

  First, the housing 1 shown in FIG. 4A is prepared near the installation location. Subsequently, the bolt 4 fixing the L-shaped cover 18 to the housing 1 is removed, and the L-shaped cover 18 is removed from the housing 1 as shown in FIG. This completes the preparation for drawing the external cable 6 into the switch gear. Subsequently, as shown in FIG. 4C, the housing 1 is horizontally moved from the front side to the back side, and as shown in FIG. 4D, the existing external cable 6 is connected to the cable from the opening 17. Pull into chamber 3. At this time, the opening 17 opens over the floor plate and the side wall of the cable chamber 3 and there is no width direction frame below the back surface, so that the external cable 6 can be easily drawn.

  After connecting the external cable 6 to the terminal, the L-shaped cover 18 is attached to the housing 1 and fixed with the bolts 4 as shown in FIG. The case where the external cable 6 is removed is the same as the case where the external cable 6 is pulled.

  The L-shaped cover 18 in the first embodiment is not limited to the shape shown in FIG. 3, and various modifications are possible. FIG. 5 shows a modification of the L-shaped cover. An L-shaped cover 18 </ b> A shown in FIG. 5A has a rectangular recess 18 b as the cable lead-in portion 5. An L-shaped cover 18B shown in FIG. 5B has a semicircular recess 18c as the cable lead-in portion 5. By setting it as such a structure, the cable drawing-in part 5 can be made into a required minimum magnitude | size. The recesses 18b and 18c may be processed according to the size of the external cable 6.

  According to the switchgear according to the first embodiment, the opening 17 that does not pass through the frame is provided across the floor plate 13 surrounding the cable chamber 3 and the side wall 15 on the back side, and the L-shaped covering the opening 17. The external cable 6 can be easily drawn into the cable chamber 3 simply by removing the mold cover 18. Moreover, after connecting the external cable 6 to the terminal in the cable chamber 3, the installation work is completed simply by attaching the L-shaped cover 18.

  Therefore, according to the first embodiment, it is easy to pull in the external cable 6, and a switchgear that can shorten the work time including preparation before installation and restoration work can be obtained. Note that the switchgear housing structure according to the first embodiment has a wide opening 17 not only when the existing external cable 6 is pulled in but also when the switchgear is newly installed, so that the external cable is not drawn. It is easy and has the effect of shortening the working time.

Embodiment 2. FIG.
In the first embodiment, if the opening 17, particularly the floor opening 17a, is to be made wider, the L-shaped cover 18 becomes larger and difficult to handle. Therefore, in the second embodiment of the present invention, in order to obtain the opening 17 wider than that in the first embodiment, a part of the floor surface opening 17a is covered with the floor surface cover 19.

  FIG. 6 is a bottom view showing the switchgear according to Embodiment 2 of the present invention. The overall configuration of the switchgear according to the second embodiment is substantially the same as that of the first embodiment, and will be described with reference to FIG.

  As shown in FIG. 6, the floor cover 19 has a round hole 19 a that becomes the cable lead-in portion 5, and is fixed to the lower portion of the housing 1 with screws (not shown). The L-shaped cover 18 and the floor cover 19 partially overlap so that there is no gap, but are not fastened. The round hole 19 a of the floor cover 19 may be processed according to the size of the external cable 6 in order to make the required minimum size for drawing the external cable 6. Further, instead of the round hole 19a, a rectangular hole may be used.

  As a procedure for installing the switch gear according to the second embodiment, a case where the existing external cable 6 is pulled into the switch gear will be described with reference to FIGS. 7 (a) to 7 (f). In FIG. 7, arrows A and C indicate the moving direction of the L-shaped cover 18, and arrow B indicates the moving direction of the housing 1. First, the housing 1 shown in FIG. 7A is prepared near the installation location. Subsequently, the bolt 4 fixing the L-shaped cover 18 to the housing 1 is removed, and the L-shaped cover 18 is removed from the housing 1 as shown in FIG. Further, the screws fixing the floor cover 19 to the housing 1 are removed, and the floor cover 19 is removed from the housing 1. This completes the preparation for drawing the external cable 6 into the switch gear.

  Subsequently, as shown in FIG. 7C, the housing 1 is horizontally moved from the front side to the back side, and as shown in FIG. 7D, the existing external cable 6 is connected to the cable from the opening 17. Pull into chamber 3. At this time, the opening 17 opens over the floor plate and the side wall of the cable chamber 3 and there is no width direction frame below the back surface, so that the external cable 6 can be easily drawn.

  After the external cable 6 is connected to the terminal, the floor cover 19 is returned to the original state through the external cable 6 through the round hole 19a of the floor cover 19 as shown in FIG. Further, as shown in FIG. 7 (f), the L-shaped cover 18 is attached to the housing 1 and fixed with the bolts 4 to complete the installation work. The case where the external cable 6 is removed is the same as the case where the external cable 6 is pulled.

  According to the second embodiment, the work of removing and attaching the floor cover 19 is increased as compared with the first embodiment, but the opening 17 is made wider without increasing the size of the L-shaped cover 18. It is possible to take. Further, by using the round hole 19a of the floor cover 19 as the cable lead-in portion 5, processing and fine adjustment according to the position and size of the external cable 6 are easy.

Embodiment 3 FIG.
Fig.8 (a) is the front view which looked at the switchgear which concerns on Embodiment 3 of this invention from the back surface, (b) is a bottom view. Moreover, Fig.9 (a) is a side view which shows the metal frame which comprises the L-shaped cover of the switchgear which concerns on this Embodiment 3, (b) is a front view, (c) is a bottom view. Further, FIG. 10A is a side view showing a metal plate constituting the L-shaped cover of the switchgear according to the third embodiment, and FIG. 10B is a front view.

  In the first embodiment and the second embodiment, the L-shaped cover 18 is formed by bending a single metal plate, but the L-shaped cover 20 in the third embodiment is a first metal member. The metal frame 21 and the metal plate 22 as the second metal member are included. Since other configurations are the same as those in the second embodiment, description thereof is omitted.

  As shown in FIG. 9, the metal frame 21 covering the floor surface opening 17a is a frame having an L-shaped cross section, and has a plurality of bolt holes 21a. Further, as shown in FIG. 10, the metal plate 22 covering the back opening 17b has a plurality of bolt holes 22a along the outer periphery thereof. By integrating the metal frame 21 and the metal plate 22, an L-shaped cover 20 having an L-shaped cross section as shown in FIG. 11 is obtained.

  When the casing 1 of the switchgear according to the third embodiment is viewed from the back, as shown in FIG. 8A, the bolt 4 that fixes the metal plate 22 to the casing 1 and the metal frame 21 are arranged in the casing 1. A bolt 4a for fixing the metal plate 22 and a bolt 4b for fixing the metal plate 22 to the metal frame 21 are fastened, and they can be loosened from the outside.

  That is, the metal plate 22 is detachably fixed to the metal frame 21 and can be attached to and detached from the housing 1 in a state where the metal frame 21 and the metal plate 22 are integrated. It is removable. The switchgear according to the third embodiment includes the floor cover 19 as in the second embodiment, but does not need to include the floor cover 19 as in the first embodiment. .

  As a switchgear installation procedure according to the third embodiment, a case where the existing external cable 6 is pulled into the switchgear will be described with reference to FIGS. 12 (a) to 12 (f). In FIG. 12, arrows A and C indicate the moving direction of the L-shaped cover 20, and arrow B indicates the moving direction of the housing 1. First, the housing 1 shown in FIG. 12A is prepared near the installation location. Subsequently, the bolts 4 and 4a fixing the L-shaped cover 20 to the housing 1 are removed, and the L-shaped cover 20 is removed from the housing 1 as shown in FIG.

  At that time, the bolt 4b that fastens the metal frame 21 and the metal plate 22 is not removed. Thereby, the L-shaped cover 20 in which the metal plate 22 and the metal frame 21 are integrated can be removed from the housing 1. Subsequently, the screws fixing the floor cover 19 to the housing 1 are removed, and the floor cover 19 is removed from the housing 1. This completes the preparation for drawing the external cable 6 into the switch gear.

  Subsequently, as shown in FIG. 12C, the housing 1 is horizontally moved from the front side to the back side, and as shown in FIG. 12D, the existing external cable 6 is connected to the cable from the opening 17. Pull into chamber 3. At this time, the opening 17 opens over the floor plate and the side wall of the cable chamber 3 and there is no width direction frame below the back surface, so that the external cable 6 can be easily drawn.

  After connecting the external cable 6 to the terminal, the floor cover 19 is returned to the original state through the external cable 6 through the round hole 19a of the floor cover 19 as shown in FIG. Furthermore, as shown in FIG. 12 (f), the L-shaped cover 20 is attached to the housing 1 and fixed with the bolts 4 and 4a to complete the installation work. The case where the external cable 6 is removed is the same as the case where the external cable 6 is pulled.

  On the other hand, when the switchgear is regularly inspected and cleaned, it is not necessary to open the opening 17, and it is sufficient that the back opening 17b is open. In this case, as shown in FIG. 13, only the metal plate 22 can be removed and the metal frame 21 can be attached to the housing 1 as it is. That is, the bolts 4 and 4b that fix the metal plate 22 to the housing 1 and the metal frame 21 are removed, and the bolt 4a that fixes the metal frame 21 and the housing 1 is fastened.

  According to the third embodiment, in addition to the same effects as those of the first embodiment or the second embodiment, when it is not necessary to open the opening 17 for periodic inspection, cleaning, etc., only the metal plate 22 is used. Since it can be removed, the work time of daily work other than installation and removal can also be shortened. It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  The present invention can be used as a casing structure of a switch gear.

1 housing, 2 circuit breaker chamber, 3 cable chamber, 4, 4a, 4b bolt,
5 Cable lead-in part, 6 External cable, 11a, 11b, 11c, 11d Frame, 12 Top panel, 13 Floor panel, 14 Open door, 15 Side wall, 16 Partition wall, 17 Opening part, 17a Floor surface opening part, 17b Rear opening part ,
18, 18A, 18B, 20 L-shaped cover, 18a Bolt hole,
18b, 18c recess, 19 floor cover, 19a round hole, 21 metal frame,
21a Bolt hole, 22 Metal plate, 22a Bolt hole, 30 Width direction frame,
31 cable lead-in part, 32 frame fixing part, 33 first frame,
34 second frame, 35 box, 36 open passage, 37 lower reinforcement,
38 Front reinforcement, 39 Reinforcement plate

Claims (5)

A switchgear comprising a top plate, a floor plate, and a housing that supports a side wall with a frame, and a cable chamber in which a terminal connected to an external cable is disposed inside the housing,
The housing has an opening in which a floor opening provided in the floor plate surrounding the cable chamber and a back opening provided in the side wall on the back side surrounding the cable chamber are integrated without the frame. And a cover having an L-shaped cross section covering the opening is detachably attached, and a part of the floor surface opening is opened as a lead-in portion of the external cable in the state where the cover is attached. A switchgear characterized by that.   The cover includes a first metal member that covers the floor surface opening, and a second metal member that is detachably fixed to the first metal member and covers the back surface opening, and the first metal member 2. The switch according to claim 1, wherein the second metal member is detachable from the housing in an integrated state, and only the second metal member is detachable from the housing. gear.   The switch gear according to claim 2, wherein the first metal member is a frame having an L-shaped cross section.   The switchgear according to any one of claims 1 to 3, wherein the cover is fixed to the housing with a bolt.   The floor surface cover which covers a part of said floor surface opening part is provided, The said floor surface cover has a hole used as the drawing-in part of the said outside wire cable, The Claim 1 characterized by the above-mentioned. The switchgear described.

Images