JP4155666B2 - Closed switchboard closure box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a closed box closed switchboard for accommodating a plurality of electric devices.
[0002]
[Prior art]
A structure of a closed box of a conventional closed switchboard and a method of assembling the closed switchboard using the closed box will be described using, for example, a closed switchboard in which drawer type breaker cradle is housed in two upper and lower stages. FIG. 5 is a side sectional view of a conventional closed switchboard, and FIG. 6 is a perspective view showing a floor portion of a closed box and a plurality of frames of the conventional closed switchboard. In the following description, the horizontal direction, vertical direction, and vertical direction in the drawing of FIG. 5 are the depth direction, height direction, and width direction of the closed switchboard, respectively.
[0003]
In FIG. 5, the outer casing of the closed box 11 of the closed switchboard is composed of a front door 12, a top plate 13, a back plate 14 and a floor portion 15. All portions of the outer cover of the closed box 11 are made of a metal plate and block the inside and the outside of the closed box 11.
[0004]
A, B, and C shown in FIG. 5 indicate sections of the three frames 40, 50, and 60 divided in the depth direction of the closed switchboard. These three frame bodies 40, 50 and 60 are each configured by combining a plurality of constituent members such as L-shape and U-shape, and are fixed vertically to the floor portion 15 by bolts, rivets or the like. . Further, the front door 12, the top plate 13, and the back plate 14 are attached to the frame bodies 40, 50, and 60 by bolts or the like.
[0005]
Further, the frame-shaped equipment attachment reference member 51 is fixed to the four L-shaped frames of the frame body 50 so as to be in a direction perpendicular to the floor portion 15. The mounting reference member 51 is provided with a plurality of mounting holes (not shown) so that the storage device and the internal components in the closed switchboard can be fixed with bolts or the like. It functions as an attachment reference plane when these storage devices and internal components are attached to the closed box 11.
[0006]
Next, the internal configuration of the closed box 11 will be described. The inside of the closed box 11 is divided into a control compartment 20, an upper and lower two-stage circuit breaker compartment 21, a bus compartment 22 and a cable compartment 23 by partition plates 17, 18, and 19 for each circuit of a storage device to be described later. The upper and lower two-stage circuit breaker compartments 21 are each constituted by a single upper and lower cradle 2.
[0007]
In each cradle 2, a drawer type circuit breaker 1 is accommodated so as to be movable in the depth direction, and each cradle 2 is fixed to a closed box 11 (partition plate 17) by a fixed frame 16. When the drawer-type circuit breaker 1 is disposed at the operating position in the cradle 2, a movable contact (not shown) of the drawer-type circuit breaker 1 is connected to the main circuit terminal 2a of the cradle 2 that is insulated and supported by a bushing. Mating.
[0008]
The main bus 3 is provided through the board space in the width direction of the closed switchboard. The cradle terminal 5 connected to one main circuit terminal 2 a and the main bus 3 are connected by a power supply side branch conductor 4. The cradle terminal 5 connected to the other main circuit terminal 2a is connected to a load-side conductor 6 that penetrates the current transformer 8 for the instrument, and the connection terminal 9 of the external cable 10 is connected to the end of the load-side conductor 6. It is connected. The load side conductor 6 is insulated and supported by a supporting insulator 7.
[0009]
Next, the floor 15 of the conventional closed box 11 will be described with reference to FIG. FIG. 7A is a plan view of the floor 15, and FIG. 7B is a cross-sectional view of the floor 15. In order to increase the floor strength, the floor portion 15 has a configuration in which four sides of the floor are processed into a U-shaped cross section and a reinforcing member 25 is attached inside. Moreover, the opening part 26 for making the external cable 10 penetrate is provided. Screw seats that are attached to the floor so that the tips of screws for attaching the closing plate 27 to the opening 26 after installation of the external cable 10 and bolts for fixing equipment to the floor do not jump out of the floor. Therefore, the floor portion 15 has a shape in which the entire floor is raised.
[0010]
Next, a method for assembling a closed switchboard using the closed box 11 will be described. As described above, in the closed box 11, the frame body to which the storage device and the internal components are attached is divided into the three frame bodies 40, 50, and 60. The storage device and the internal components can be mounted in parallel.
[0011]
8A and 8B are structural views showing a state in which the cradle 2 is attached to the attachment reference member 51. FIG. As shown in FIGS. 8A and 8B, the mounting reference member 51 is fixed to a carriage or the like so as to be parallel to the installation surface of the closed switchboard, and the cradle 2 is suspended by a crane or the like to The cradle 2 is fixed on the fixed frame 16 and the attachment reference member 51 with bolts or the like.
[0012]
Then, after the partition plate 17 is attached, the frame 50 is rotated by 180 ° in order to incorporate the storage device and the internal components to be stored below the attachment reference member 51, and the storage device and the internal components are assembled. I do. Thus, only after completing the mounting operation of the cradle 2, the storage devices and internal components such as the main bus 3 and the instrument current transformer 8 can be incorporated in the bus compartment 22 and the cable compartment 23.
[0013]
[Problems to be solved by the invention]
In the conventional method for assembling a closed switchboard as described above, it is necessary to rotate the frame 180 ° after the cradle is housed, and there is a problem that work safety is poor and work efficiency is poor. In addition, since the floor is raised, the structure is complicated, and there is also a problem that the roller comes off inside the floor when the roller is pulled.
[0014]
The present invention has been made in view of such circumstances, and the closure that can improve the safety and efficiency of the assembly work by improving the division position of the frame of the closed box and the installation position of the attachment reference member. The purpose is to provide a switchboard enclosure.
[0015]
Another object of the present invention is to provide a closed box for a closed switchboard that can improve strength and simplify the structure by improving the structure of the floor of the closed box.
[0016]
[Means for Solving the Problems]
The closed box of the closed switchboard according to the first invention includes a control compartment, a circuit breaker compartment, a bus compartment, and a cable compartment in which the internal space is an internal component for each circuit of a storage device including at least a circuit breaker, a bus and an external cable. A frame that is divided into two parts at the front and rear, with the dividing position being in the vicinity of the boundary between the breaker compartment, the bus compartment, and the cable compartment, and substantially perpendicular to the two divided frames. and the floor is, the cradle of the breaker housing for movably housing the circuit breaker in the depth direction, the inside of the front of the frame in the two divided frame, the circuit breaker and the control compartment Provided substantially perpendicular to the floor as a boundary with the compartment Cage, wherein the breaker mounting reference surface of the inner component constituting the cradle or the breaker compartment for accommodating a Do Ri, cradles for the breaker housing is fixed mounted from the rear side of the front frame The mounting reference member is provided.
[0019]
In the first invention, the installation position of the mounting reference member provided perpendicularly to the floor surface of the closed box of the closed switchboard is set at the rear part of the breaker compartment as in the conventional example (breaker compartment, busbar compartment and cable compartment). To the front part of the circuit breaker compartment (between the control compartment and the circuit breaker compartment), and the boundary positions of the frames constituting the enclosure are changed to the circuit breaker compartment, the bus compartment and the cable compartment. Between. In this way, when the assembly reference work is performed with the attachment reference member horizontal, there is no need to rotate the frame 180 ° after attaching the cradle as in the conventional example.
[0020]
The closed box of the closed switchboard according to the second invention is characterized in that, in the first invention, ribs by punching are provided on the floor surface.
[0021]
In the second invention, in addition to the first invention, ribs formed by punching are provided on the floor surface. Therefore, the strength of the floor can be increased with a simple configuration.
[0022]
A closed box of a closed switchboard according to a third aspect of the present invention is characterized in that, in the second aspect , a hole for fixing the storage device and the internal structural member is formed in the rib.
[0023]
In the third invention, in addition to the second invention, the rib is provided with a hole for fixing the storage device and the internal structural member. Therefore, even if the floor portion has a simple configuration, the tip of the fixing member for fixing the storage device and the internal component does not protrude outside the closed switchboard.
[0024]
A closed box of a closed switchboard according to a fourth aspect of the present invention is the closed box according to any one of the first to third aspects, wherein an opening for passing an external cable is provided on the floor surface, and a punching process is performed around the opening. It is characterized by being.
[0025]
In the fourth invention, in addition to any of the first to third inventions, a punching process is performed around the opening on the floor surface. Therefore, even if the floor in a simple configuration, the leading end of the fixing member for secure the closing member for closing the opening portion does not protrude outside the closed switchboard.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
The structure of the closed box of the closed switchboard and the method of assembling the closed switchboard using the closed box of the present invention will be described using, for example, a closed switchboard in which drawer type circuit breaker cradle is housed in two upper and lower stages.
[0029]
FIG. 1 is a side sectional view of a closed switchboard of the present invention, and FIG. 2 is a perspective view showing a plurality of frames and a floor surface of a closed box of the closed switchboard of the present invention. In the following description, the horizontal direction, vertical direction, and vertical direction in the drawing of FIG. 5 are the depth direction, height direction, and width direction of the closed switchboard, respectively.
[0030]
In FIG. 1, the outer cover of the closed box 11 of the closed switchboard is composed of a front door 12, a top plate 13, a back plate 14, and floor surfaces 24a and 24b. All portions of the outer cover of the closed box 11 are made of a metal plate and block the inside and the outside of the closed box 11.
[0031]
X and Y shown in FIG. 1 indicate sections of two frames 70 and 80 divided into two in the depth direction of the closed switchboard. These two frames 70 and 80 are each configured by combining a plurality of constituent members such as L-shape and U-shape, and are fixed to the floor surfaces 24a and 24b by bolts, rivets, etc., respectively. . The front door 12, the top plate 13, and the back plate 14 are attached to the frames 70 and 80 with bolts or the like.
[0032]
Further, a U-shaped attachment reference member 71 is fixed to the four L-shaped frames 70a, 70b, 70c and 70d of the frame body 70 so as to be in a direction perpendicular to the floor surface 24a. The mounting reference member 71 is provided with a plurality of mounting holes (not shown) so that the storage device and the internal components in the closed switchboard can be fixed with bolts or the like. It functions as an attachment reference plane when these storage devices and internal components are attached to the closed box 11.
[0033]
Next, the internal configuration of the closed box 11 will be described. The inside of the closed box 11 is divided into a control compartment 20, an upper and lower two-stage circuit breaker compartment 21, a bus compartment 22, and a cable compartment 23 by partition plates 18, 19, and 31, for each circuit of a storage device to be described later. The upper and lower two-stage circuit breaker compartments 21 are each constituted by a single upper and lower cradle 2. The attachment reference member 71 is provided at the boundary between the control compartment 20 and the circuit breaker compartment 21.
[0034]
In each cradle 2, a drawer type circuit breaker 1 is accommodated so as to be movable in the depth direction, and each cradle 2 is fixed to a closed box 11 (partition plate 31) by a fixed frame 16. When the drawer-type circuit breaker 1 is disposed at the operating position in the cradle 2, a movable contact (not shown) of the drawer-type circuit breaker 1 is connected to the main circuit terminal 2a of the cradle 2 that is insulated and supported by a bushing. Mating.
[0035]
The main bus 3 is provided through the board space in the width direction of the closed switchboard. The cradle terminal 5 connected to one main circuit terminal 2 a and the main bus 3 are connected by a power supply side branch conductor 4. The cradle terminal 5 connected to the other main circuit terminal 2a is connected to a load-side conductor 6 that penetrates the current transformer 8 for the instrument, and the connection terminal 9 of the external cable 10 is connected to the end of the load-side conductor 6. It is connected. The load side conductor 6 is insulated and supported by a supporting insulator 7.
[0036]
Next, the floor surfaces 24a and 24b of the closed box 11 will be described with reference to FIG. 3A is a plan view of the floor surfaces 24a and 24b, and FIG. 3B is a cross-sectional view of the floor surfaces 24a and 24b. Reinforcing ribs 28 and 28 are provided on the floor surfaces 24a and 24b. Each rib 28 is formed with two holes 29 and 29 for fixing the storage device and the internal components, and fixing screws are fitted into the holes 29 to fix the storage device and the internal components. In this case, the tip of the fixing screw is configured not to jump out of the surface of the floor surfaces 24a, 24b.
[0037]
The floor surface 24b is provided with an opening 26 for allowing the external cable 10 to pass therethrough. After the external cable 10 is installed, a punching process 30 is performed around the opening 26 so that the tip of the screw for attaching the closing plate 27 to the opening 26 does not jump out from the surface of the floor surface 24b.
[0038]
Next, the assembly method of the closed switchboard of the present invention using the closed box 11 will be described. Note that, as described above, in the closed box 11 of the present invention, the frame body to which the storage device and the internal components are attached is divided into the two frame bodies 70 and 80. The mounting operation of the storage device and the internal components can be performed in parallel.
[0039]
4A and 4B are structural views showing a state in which the cradle 2 is attached to the attachment reference member 71. FIG. The mounting reference member 71 is provided at the boundary between the control compartment 20 and the circuit breaker compartment 21 and, as shown in FIGS. 4A and 4B, the equipment mounting reference member 71 is parallel to the installation surface of the closed switchboard. Is fixed to the carriage. The partition plate 31 of the control compartment 20 and the circuit breaker compartment 21 having the positioning function of the cradle 2 is fixed to the equipment attachment reference member 71. Then, the cradle 2 is suspended by a crane or the like and placed on the upper surface of the partition plate 31, and the cradle 2 is fixed to the fixed frame 16 and the device mounting column 72 with bolts or the like.
[0040]
In parallel with the fixing operation of the cradle 2, storage devices such as the main bus 3 and the current transformer 8 and the internal components are attached to the frame body 80.
[0041]
Then, the frame body 80 to which the storage device and the internal component members are attached is suspended by a crane or the like, and is placed on the upper portion of the frame body 70 to connect the frame body 70 and the frame body 80.
[0042]
As described above, in the present invention, the storage device for the closed switchboard and the frame to which the internal components are attached are divided into the two frames 70 and 80 in the depth direction of the closed switchboard. In addition, the work of attaching the internal components to the frame can be performed in parallel for each of the frames 70 and 80, and the frame is divided into two at the rear of the circuit breaker compartment 21, and the attachment reference member 71 is provided in the front part of the circuit breaker compartment 21, and the cradle 2 is attached after the partition plate 31 having the cradle positioning function is fixed to the attachment reference member 71. The work of rotating 180 ° is not necessary and the work is easy. As a result, the safety of the assembly work is improved and the work time is shortened.
[0043]
In the closed box of the closed switchboard of the present invention, when the depth of the frame body 80 is increased, the frame body 80 may be further divided into a plurality of frame bodies in the depth direction.
[0044]
【The invention's effect】
As described above in detail, in the closed box of the closed switchboard of the first invention, the installation position of the mounting reference member provided perpendicular to the floor surface of the closed box of the closed switchboard is set to the rear part of the breaker compartment as in the conventional example. To the front part of the circuit breaker compartment, and the division position of the frame of the closed box is made to be the boundary area between the circuit breaker compartment, the busbar compartment and the cable compartment. When performing, the operation | work which rotates a frame 180 degrees after attaching a cradle like a prior art example can be made unnecessary.
[0046]
In the closed box of the closed switchboard according to the second aspect of the invention, the floor ribs are provided on the floor surface, so that the strength of the floor portion can be increased, and the configuration of the floor portion can be simplified and the roller drawing work can be safely performed. Yes.
[0047]
In the closed box of the closed switchboard according to the third aspect of the present invention, since the holes for fixing the storage device and the internal component member are provided in the rib on the floor surface, the tip of the fixing member for fixing the storage device and the internal component member However, it does not stick out of the closed switchboard, and the floor configuration can be simplified and the roller pulling operation can be performed safely.
[0048]
In the closed box of the closed switchboard according to the fourth aspect of the invention, since the punching process is performed around the opening on the floor surface, the tip of the fixing member for fixing the closing plate for closing the opening is located outside the closed switchboard It does not stick out, and the construction of the floor can be simplified and the roller drawing work can be performed safely.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a closed switchboard in which a drawer type circuit breaker cradle is housed in two upper and lower stages in a closed box of the closed switchboard of the present invention.
FIG. 2 is a perspective view showing a plurality of frames and a floor surface of the closed box of the closed switchboard of the present invention.
FIG. 3 is a structural diagram of the floor surface of the closed box of the present invention.
FIG. 4 is a structural diagram showing a state in which a cradle is attached to an attachment reference member of the closed box of the present invention.
FIG. 5 is a side sectional view of a closed switchboard in which a drawer type circuit breaker cradle is housed in two upper and lower stages in a closed box of a conventional closed switchboard.
FIG. 6 is a perspective view showing a plurality of frames and a floor portion of a closed box of a conventional closed switchboard.
FIG. 7 is a structural diagram of a floor portion of a conventional closed box.
FIG. 8 is a structural diagram showing a state in which a cradle is attached to an attachment reference member of a conventional closed box.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pull-out type circuit breaker, 2 Cradle, 3 Main bus line, 10 Outside line cable, 11 Closure box, 18 Partition plate, 19 Partition plate, 20 Control compartment, 21 Breaker compartment, 22 Bus compartment, 23 Cable compartment, 24a, 24b Floor surface, 26 opening, 27 closing plate, 28 rib, 29 hole, 30 stamping, 31 partition plate, 70 frame, 71 attachment reference member, 80 frame.

Claims (4)

The internal space is divided into a plurality of compartments including a control compartment, a breaker compartment, a bus compartment, and a cable compartment by internal components, at least for each circuit of the storage device including the circuit breaker, busbar, and external cable,
A frame that is divided into two parts in the front-rear direction, with the dividing position being near the boundary between the breaker compartment, the bus compartment, and the cable compartment;
A floor surface that is substantially perpendicular to the two-divided frame;
A circuit breaker storage cradle for storing the circuit breaker movably in the depth direction;
The circuit breaker is provided substantially vertically to the floor as a boundary between the control compartment and the circuit breaker compartment inside the front frame of the two divided frames . Ri Do a mounting reference surface of the inner component constituting the cradle or the breaker compartment for accommodating a mounting reference member cradle for the breaker housing is fixedly attached from the rear side of the front frame
Closing the switchboard of the closed box, characterized in that it is provided with a.   2. A closed box of a closed switchboard according to claim 1, wherein ribs formed by punching are provided on the floor surface.   The closed box of a closed switchboard according to claim 2, wherein a hole for fixing a storage device and an internal component is formed in the rib.   The closed box for a closed switchboard according to any one of claims 1 to 3, wherein an opening for passing an external cable is provided on the floor surface, and a punching process is performed around the opening. .

Images