Dismantling methods for electrical distribution panels and electrical distribution panels

Abstract

To provide a switchboard having a metal case for a medium-sized consumer installed on the roof of a building or within the premises of a factory, which can be efficiently assembled and disassembled.SOLUTION: A switchboard includes an outer frame unit whose framework is formed by an outer frame, and an inner frame unit whose framework is formed by an inner frame, and one or more inner frame units are arranged within the outer frame unit, internal equipment is installed in the inner frame unit, and the switchboard is provided with a fitting portion for fixing the inner frame unit to other internal units and a fitting portion for fixing the outer frame unit to the internal units. Also, an outer frame unit is provided for each component that forms a row of individual switchboards. The fitting portion for fixing the inner frame unit to other internal units and the fitting portion for fixing the outer frame unit to the internal units are formed by fitting pins and fitting holes.SELECTED DRAWING: Figure 3A

Description

Technical Field

[0001] The present invention relates to a switchboard and a method for disassembling the switchboard, and particularly to a switchboard for medium-scale consumers installed on the roof of a building or within the premises of a factory, and a switchboard and a method for disassembling the switchboard suitable for efficiently assembling and disassembling the switchboard.

Background Art

[0002] A switchboard is equipment provided between a power source and a load for opening and closing a circuit, raising and lowering the power supply voltage, and switching an electrical system, and various circuit breakers, protective relays, meters, etc. are provided.

[0003] Particularly, as a domestic electrical installation, a switchboard is installed for medium-scale consumers installed on the roof of a building or within the premises of a factory, and the primary system voltage is supplied to such a switchboard from a distribution substation of an operator via a distribution line.

[0004] An outdoor switchboard installed for such medium-scale consumers has a shape like a warehouse with a metal casing, and electrical equipment is arranged inside the metal casing to be protected from external stresses such as wind and rain.

[0005] As an example of the structure of such a switchboard with a metal casing, for example, there is a disclosure in Patent Document 1. Patent Document 1 includes, as a board structure, a box-shaped cover and a frame on which various devices are arranged. The cover has an opening formed on the front side, and the frame has a pair of columns and a lower connecting portion. Thereby, it is said that the distance between an operator and various devices attached to the frame can be shortened.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

[0007] As described in Patent Document 1, when assembling a distribution board, it is common practice to first install the outer casing and then install the electrical equipment onto the internal frame.

[0008] The following describes the structure of a typical electrical distribution panel using Figures 1 and 2.

[0009] A typical distribution panel, as shown in Figure 1, consists of a front door 13a, a rear door 13b, a roof 10, and side panels 15. In the example in Figure 1, there are three sides, with three front doors 13a and three rear doors 13b. The configuration of individual distribution panels arranged in rows will be referred to as "row panels" below.

[0010] When working on the distribution panel, it can be opened from the front and back using two doors, allowing for the installation of internal electrical equipment, as well as inspection and parts replacement in case of repairs.

[0011] Looking at the internal casing structure of the distribution panel from the inside, it is as shown in Figure 2. A rectangular casing 16 is placed on a base 19, and a roof 10 is installed on the top. The necessary number of columns 14 (two on each side in Figure 2) are placed on the side surfaces of the casing 16, and the necessary number of retaining brackets 12 (three pairs in Figure 2) are placed between the columns 14 and other columns 14, and between the columns 14 and the casing 16, thereby holding the internal electrical equipment.

[0012] A protective plate 11 is installed on the rear side of the enclosure 16 to protect the internal structure and electrical equipment.

[0013] The door (front) 13a has an instrument viewing window 18 at a height that is within the worker's line of sight, allowing them to view and operate the instruments on the instrument / control panel 25.

[0014] In terms of the electrical system, an external high-voltage cable 21 is brought in from the floor and connected to the high-voltage busbar 20 via a load switch 26. From the high-voltage busbar 20, the AC current is input to the primary side of the transformer 22 and output to the secondary side after transformation. On the secondary side, it is connected to the customer's low-voltage equipment (not shown) via a circuit breaker 23. In addition, control equipment 24 such as auxiliary relays is provided to control the connections on the secondary side.

[0015] Thus, in the distribution boards described in Patent Document 1 and the general-purpose distribution boards shown in Figures 1 and 2, when dismantling distribution boards with metal casings for recycling or reuse, the doors and protective plates must be opened to remove the internal equipment, and the work must be done through the resulting opening. This limits the number of workers due to the constraints of the opening (equipment in the foreground and external cables), and makes it difficult to use heavy machinery such as cranes and lifters. Furthermore, because it is difficult to use heavy machinery such as cranes and lifters, removing equipment located at high places (such as load switches) or heavy objects (such as transformers) is a difficult and dangerous task.

[0016] Furthermore, the installation of electrical equipment built into distribution panels generally involved the use of various types and sizes of fasteners (bolts, screws, etc.), requiring the identification of the fasteners and the use of different tools each time.

[0017] Even in the switchboard technology described in Patent Document 1, the necessary electrical equipment had to be attached to the frame, making division of labor among multiple workers difficult.

[0018] The object of the present invention is to provide a switchboard with a metal casing for medium-sized consumers installed on the rooftops of buildings or within factory grounds, which can be assembled and disassembled efficiently. [Means for solving the problem]

[0019] The configuration of the switchboard of the present invention preferably has an outer frame unit configured by an outer frame and an inner frame unit configured by an inner frame. One or more inner frame units are arranged within the outer frame unit, internal equipment is installed in the inner frame unit, and there are fitting parts for fixing the inner frame unit to other internal units and fitting parts for fixing the outer frame unit to the internal units.

Effect of the Invention

[0020] According to the present invention, there is provided a switchboard with a metal housing for medium-scale consumers installed on the rooftop of a building or within the premises of a factory, which enables efficient assembly and disassembly of the switchboard.

Brief Description of the Drawings

[0021] [Figure 1] [[ID=IS]]A perspective view showing an overview of a general switchboard. [Figure 2] A perspective view showing the internal structure of a general switchboard. [Figure 3A] A diagram conceptually explaining the configuration of a switchboard according to an embodiment. [Figure 3B] A diagram conceptually explaining the configuration of a switchboard at the time of disassembly according to an embodiment (Part 1). [Figure 3C] A diagram conceptually explaining the configuration of a switchboard at the time of disassembly according to an embodiment (Part 2). [Figure 4A] A diagram explaining the configuration of a switchboard according to an embodiment. [Figure 4B] A diagram explaining the configuration of a switchboard at the time of disassembly according to an embodiment (Part 1). [Figure 4C] A diagram explaining the configuration of a switchboard at the time of disassembly according to an embodiment (Part 2). [Figure 5A] A perspective view showing the configuration of the inner and outer frames of the switchboard. [Figure 5B] A perspective view showing the fitting parts provided on the inner and outer frames of the switchboard. [Figure 6] A detailed view of the main part of the inner frame - inner frame fitting part. [Figure 7A]This is an example of the configuration of the inner frame unit of a distribution panel (part 1). [Figure 7B] This is an example of the configuration of the inner frame unit of a distribution panel (part two). [Figure 7C] This is an example of the configuration of the inner frame unit of a distribution panel (part three). [Figure 7D] This is an example of the configuration of the inner frame unit of a distribution panel (part four). [Figure 7E] This is an example of the configuration of the inner frame unit of a distribution panel (part five). [Figure 7F] This is an example of the configuration of the inner frame unit of a distribution panel (part six). [Modes for carrying out the invention]

[0022] Hereinafter, one embodiment of the present invention will be described with reference to Figures 3A to 7F.

[0023] In this embodiment, the power distribution panel has a modular configuration divided into an outer frame unit and a plurality of inner frame units contained within the outer frame unit. The outer frame unit is the unit to which the outer covering (door, protective plate, roof, etc.) is attached, and the inner frame unit is the unit that houses electronic equipment and internal structures within the inner frame.

[0024] The following uses the same symbols as those used in the explanation of the typical distribution panel shown in Figures 1 and 2.

[0025] For example, as shown in Figures 3A and 4A, the configuration of the distribution panel is such that the outer frame unit 40 houses the four inner frame units, with the outer frame unit 40 containing the upper inner frame unit 30u, the lower inner frame unit 30d, the rear inner frame unit 30b, and the front inner frame unit 30f.

[0026] The inner frame unit (rear) 30b is a unit placed on the door (rear) 13b side, and the inner frame unit (front) 30f is a unit placed on the door (front) 13a side. The inner frame unit (upper) 30u and the inner frame unit (lower) 30d are placed between the inner frame unit (rear) 30b and the inner frame unit (front) 30f, with the inner frame unit (lower) 30d placed below the inner frame unit (upper) 30u.

[0027] When dismantling a power distribution panel of this embodiment, the following steps should be followed. (I) First, the roof 10 is lifted and dismantled using heavy machinery such as a crane. (II) Next, disconnect the electronic devices of the inner frame unit (upper) 30u, inner frame unit (lower) 30d, inner frame unit (rear) 30b, and inner frame unit (front) 30f from each other, and also disconnect any connections to external cables. (III) Next, the inner frame unit (rear) 30b and the inner frame unit (front) 30f are lifted by heavy machinery such as a crane and removed from the open ceiling section (Figures 3B, 4B, 3C, and 4C). (IV) Next, the inner frame unit (upper) 30u and the inner frame unit (lower) 30d are removed from the open ceiling section by lifting the roof 10 with heavy machinery such as a crane (Figures 3B and 4B). (V) Finally, the outer frame unit 40 is dismantled, and the individual inner frame units (upper) 30u, (lower) 30d, (rear) 30b, and (front) 30f are dismantled.

[0028] Figures 3B, 4B, 3C, and 4C show that the roof 10, inner frame unit (rear) 30b, and inner frame unit (front) 30f are located in different places, while the outer frame unit 40, inner frame unit (upper) 30u, and inner frame unit (lower) 30d are located in different places.

[0029] In this embodiment, as shown in Figure 4B, the inner frame unit (lower section) 30d contains a transformer 22 as an internal structure, and the inner frame unit (upper section) 30u contains a load switch 26 and a high-voltage busbar 20 as internal structures.

[0030] Furthermore, a portion of the external cable 21 is routed to the inner frame unit (rear) 30b, and the control equipment 24, instrument / operation panel 25, and circuit breaker 23 are routed to the inner frame unit (front) 30f.

[0031] As described above, in the structure of the distribution panel of this embodiment, the ceiling roof is first dismantled, then the inner frame (upper section) is dismantled, and so on, using heavy machinery such as a crane to dismantle it straight up. Furthermore, while maintaining the outer frame and the panel in a grid state, the inner frame unit can be dismantled without dismantling the outer covering other than the roof.

[0032] This method allows multiple people to work on the removed inner frame units simultaneously in a spacious area, enabling efficient work. In particular, by removing the inner frame units (rear) 30b and (front) 30f, which are closer to the door, from the outer frame unit 40 first, it becomes easier to access the inner frame units (upper) 30u and (lower) 30d, making the work easier.

[0033] The above explains the advantages in the dismantling process of electrical distribution panels, but even during the manufacturing process of electrical distribution panels, it is possible to work in units of inner frame units, namely inner frame unit (upper) 30u, inner frame unit (lower) 30d, inner frame unit (rear) 30b, and inner frame unit (front) 30f, which improves assembly efficiency.

[0034] Next, the assembly configuration of the inner and outer frames of the distribution panel will be explained using Figures 5A to 6.

[0035] As shown in Figure 5A, the assembly configuration of the inner and outer frames of the distribution panel is such that multiple inner frames 31 are fitted into the outer frame 41, and gaps 50 are provided between the inner frames 31 and between the outer frame 41 and the inner frames 31.

[0036] For the outer frame 41 and inner frame 31, painted steel or stainless steel can be used as materials. It is desirable to provide a liner (spacer) in the gap 50 to maintain seismic resistance. For the liner, steel plate or stainless steel plate can be used.

[0037] Furthermore, outer frame 41 and inner frame 31 are each provided with outer frame lifting holes 42 and inner frame lifting holes 32, respectively, so that lifting hardware such as eye bolts can be attached, or a crane hook can be directly attached to allow for lifting operations.

[0038] Furthermore, both the outer frame 41 and the inner frame 31 need to have a certain degree of strength. The outer frame needs to be strong enough to withstand snow and typhoons, while the inner frame 31 needs to be strong enough to withstand the load of the equipment inside the panel, seismic resistance, and, in the case of stacking, the load including the load of the upper layer.

[0039] The outer frame 41 and inner frame 31 are each provided with fitting parts for assembly. Figure 5B shows that an inner frame-to-inner frame fitting part 60 is provided between the inner frame unit (upper) 30u and the inner frame unit (lower) 30d, and an outer frame-to-inner frame fitting part 70 is provided between the outer frame unit 40 and the inner frame unit (lower) 30d. This is because gaps between units would make positioning during assembly difficult.

[0040] In the inner frame-inner frame fitting section 60, a convex member is provided on the inner frame 31 that constitutes the inner frame unit (lower section) 30d, and a concave member is provided on the inner frame unit (upper section) 30u, and the respective members are fitted together. In the outer frame-inner frame fitting section 70, a convex member is provided on the bottom plate 43 of the outer frame unit 40, and a concave member is provided on the inner frame unit (lower section) 30u, and the respective members are fitted together.

[0041] Figure 6 shows details of the main parts of the inner frame-inner frame fitting section 60. In the example in Figure 6, a fitting hole 61 is provided in the inner frame 31 of the inner frame unit (upper) 30u, and a fitting pin 62 is provided in the inner frame unit (lower) 30d. The fitting pin 62 may be inserted into the inner frame, or a protrusion may be formed during the molding of the inner frame 31.

[0042] The outer frame-inner frame fitting portion 70 is similar, but in this case, a fitting pin 62 is provided on the bottom plate 43.

[0043] Next, we will explain the variations in the configuration of the inner frame unit of the distribution board using Figures 7A to 7F.

[0044] The configuration shown in Figure 7A is an example in which vertical inner frame units are installed on the front and back, respectively, with horizontal inner frame units installed vertically between them. This is the configuration described in this embodiment.

[0045] The configuration shown in Figure 7B is an example in which vertical inner frame units are installed on the back and horizontal inner frame units are installed on the front in the order of top, middle, and bottom.

[0046] The configuration shown in Figure 7C is an example in which vertical inner frame units are installed on the back and horizontal inner frame units are installed in four layers on the front.

[0047] The configuration shown in Figure 7D is an example in which a horizontal inner frame unit is installed on the top surface, vertical inner frame units are installed below that inner frame unit on the front and back, and a horizontal inner frame unit is installed in between them.

[0048] The configuration shown in Figure 7E is an example in which vertical inner frame units are installed at the front and back on the rear, and horizontal inner frame units are installed at the top, middle, and bottom on the front.

[0049] The configuration shown in Figure 7F is an example in which vertical inner frame units are installed on the left and right sides of the front, vertical inner frame units are installed on the back, and vertical inner frame units are installed on the left and right sides in between them.

[0050] In this way, various configurations of the inner frame unit can be used depending on the configuration of the internal components arranged in the distribution panel.

[0051] In this embodiment, the configuration of the power distribution panel has been described, but it can be applied to electrical equipment and electrical installations in which the internal components can be modularized and arranged.

[0052] As described above, according to this embodiment, the configuration of a power distribution panel with a metal casing for medium-sized consumers installed on the rooftops of buildings or on the premises of factories can be modularized into an outer frame unit and an appropriate number of inner frame units, thereby enabling efficient assembly and disassembly of the power distribution panel. [Explanation of symbols]

[0053] 10...Roof, 12...Retaining bracket, 13a...Door (front), 13b...Door (rear), 14...Column, 15...Side panel, 16...Housing, 18...Instrument viewing window, 19...Base, 20...High-voltage busbar, 21...External cable, 22...Transformer, 23...Circuit breaker, 24...Control equipment, 25...Instrument / operation panel, 26...Load switch, 30u...Inner frame unit (upper section), 30d...Inner frame unit (lower section), 30b...Inner frame unit (back), 30f...Inner frame unit (front), 31...Inner frame, 32...Hole for hanging inner frame. 40...Outer frame unit, 41...Outer frame, 42...Hole for hanging outer frame, 43...Bottom plate, 50... Gap, 60...Inner frame - Inner frame fitting part, 61...Fitting hole, 62...Fitting pin, 70... Outer frame - Inner frame fitting section

Claims

1. A distribution board for installing multiple electrical devices, The outer frame unit that constitutes the outer frame of the aforementioned distribution panel, The system comprises a plurality of inner frame units provided within the outer frame unit and composed of inner frames, One or more of the multiple inner frame units can be installed in each of the multiple electrical devices. The outer frame unit is fixed to one of the plurality of inner frame units by a first fitting portion. A distribution panel in which one of the aforementioned multiple inner frame units is fixed to another inner frame unit by a second fitting portion.

2. The outer frame unit is A power distribution panel according to claim 1, having a structure in which the top surface is open.

3. The first fitting portion is The power distribution board according to claim 1, comprising a convex member provided on the outer frame unit and a concave member provided on any one of the plurality of inner frame units.

4. The convex member is a fitting pin, The distribution board according to claim 3, wherein the recessed material is a fitting hole.

5. The second fitting portion is The power distribution board according to claim 1, comprising a recessed member provided in one inner frame unit and a convex member provided in the other inner frame unit.

6. The power distribution board according to claim 1, wherein the outer frame of the outer frame unit and the inner frames of the plurality of inner frame units are formed with hanging holes.

7. The power distribution board according to claim 1, wherein a liner is provided between the outer frame of the outer frame unit and the inner frames of the plurality of inner frame units, or between the inner frame of one inner frame unit and the inner frame of another inner frame unit.

8. An outer frame unit that constitutes the outer frame of a power distribution panel, The system comprises a plurality of inner frame units provided within the outer frame unit and composed of inner frames, The outer frame unit has a structure in which the top surface is open. A method for dismantling a distribution board, wherein one or more of the multiple inner frame units can be installed in any one of the multiple electrical devices, A step of disconnecting the mutual connections of electronic devices installed in the plurality of inner frame units, A method for dismantling a power distribution panel, comprising the steps of lifting one of the plurality of inner frame units and removing the one inner frame unit from the upper surface of the outer frame unit.

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