JP2021035246A - Switch gear - Google Patents

Abstract

To enable work, such as inspection of electric equipment of a switch gear, to be performed even in rainy weather and improve workability of inspection and maintenance work.SOLUTION: A switch gear comprises: a switch gear body 2 which is a storage body having a substantially rectangular parallelepiped shape and includes a substantially square front surface opening 5; and a door body 10 which opens or closes the front surface opening 5. The door body 10 includes: a substantially square frame body 11 which is rotatably connected to an upper edge part 5a, extending in a substantially horizontal direction, of the front surface opening 5 through a hinge 13 and faces a peripheral edge of the front surface opening 5; and a door plate 12 which is rotatably connected to one side frame part, extending in a substantially vertical direction, of the frame body 11 through a hinge 14 and opens or closes an opening of the frame body 11.SELECTED DRAWING: Figure 4

Description

The present invention relates to a switch gear in which electrical equipment is housed in the switch gear body.

The switch gear is covered with a door body that can open and close the front opening for inspection and maintenance of the electrical equipment housed inside.

For example, Patent Document 1 relates to a rainwater protection device that prevents rainwater from entering the cubicle even in rainy weather when inspecting a cubicle (similar to a switch gear).

Patent Document 2 relates to a cubicle type power receiving device that enables inspection and maintenance in rainy weather in a plurality of arranged cubicles.

Patent Document 3 relates to a rainproof device for preventing rainwater from entering the cubicle.

Each of these patent documents describes a door body provided with a side-opening type door body with respect to the cubicle main body.

Japanese Unexamined Patent Publication No. 2008-228404 JP-A-2010-17012 Japanese Unexamined Patent Publication No. 2013-143811

The cubicles (switch gears) described in the above patent documents are devised to prevent rainwater from entering the cubicles (switch gears).

However, since the switch gear is used to inspect and maintain the stored electrical equipment, the door body is opened, but in the case of a side-opening door body, the position is close to the operator with the door body open. This can get in the way of your work.

In the case of multiple switch gears installed in a row, the work may be performed with the multiple door bodies of the switch gears open, and in this case, the adjacent door bodies that are opened particularly interfere with the work. Was there.

Further, in particular, when replacing the electric equipment, the electric equipment must be lifted by the lifter and pulled out from the switch gear body, which may interfere with the door body.

Further, there is a problem that lateral movement is hindered by the door body when the work of one switch gear main body is completed and the work is moved to the adjacent switch gear main body.

Therefore, an object of the present invention is to provide a switch gear capable of inspecting and maintaining electrical equipment of a switch gear even in rainy weather and improving workability of inspection and maintenance.

In order to solve the above problems, the invention of claim 1 includes a switch gear main body which is a substantially rectangular parallelepiped accommodating body and has a substantially square front opening, and a door body which opens and closes the front opening. A substantially square frame that is rotatably connected to the substantially horizontally extending upper edge of the front opening via a hinge and faces the peripheral edge of the front opening, and one side frame that extends substantially vertically of the frame. The door plate is rotatably connected to the frame via a hinge to open and close the opening of the frame.

According to the present invention, the switch gear opens the door body including the frame body and the door plate in the vertical opening direction with respect to the switch gear main body.

The invention of claim 2 is characterized in that, in the switch gear according to claim 1, when the door body rotates upward, a rotation assisting means for assisting the rotation is provided.

According to a third aspect of the present invention, in the switch gear according to the first or second aspect, the door body is divided into two in the vertical direction, and the door body can be freely folded around an axis extending substantially horizontally. It is characterized by being done.

According to the invention of claim 1, a door body for opening and closing the front opening of the switch gear main body is provided, and the door body is rotatably connected to an upper edge portion extending substantially horizontally of the front opening via a hinge. A door plate that is rotatably connected to a substantially square frame facing the peripheral edge of the front opening and one side frame portion extending substantially vertically of the frame via a hinge to open and close the opening of the frame. By providing, the door body can be opened vertically with respect to the switch gear body, and the door body opened upward can be used as a roof, enabling inspection work in rainy weather. In addition, since there is no door body in front of the switch gear body, a large work space can be taken, which makes it easier to perform work such as inspection and maintenance of electrical equipment, especially when replacing equipment. Further, the movement in the lateral direction can be easily performed because there is no door body.

According to the second aspect of the present invention, when the door body rotates upward, the rotation assisting means for assisting the rotation is provided, so that the opening operation in the vertical opening direction can be lightly performed.

According to the third aspect of the present invention, the door body is divided into two in the vertical direction, and the door body is foldable around an axis extending substantially horizontally, so that the amount of protrusion from the front opening of the switch gear body is large. Can be made smaller, which is effective when a large number of switch gears are arranged in a narrow space, for example, indoors.

The first embodiment of the present invention is shown together with FIGS. 2 to 5, and this figure is a front view in a state where all the door bodies of the three connected switch gears are closed. From the state shown in FIG. 1, the switch gear on the left side has the door body closed, the second switch gear from the left has the door body half open, and the switch gear on the right side has the door body open. It is a front view which shows. It is a perspective view which shows the state which the door body and the frame body are closed. It is a perspective view which shows the state which opened the door body and the frame body in the vertical opening direction. It is a side view of the main part which shows the opening operation of a frame body centering on a gas spring, (a) is the state which the frame body is closed, (b) is the state which the frame body is in the process of opening, (c). Indicates a state in which the frame is open. The second embodiment of the present invention is shown together with FIGS. 7 and 8, and this figure is a perspective view showing a state in which both the door body and the frame body are closed. It is a perspective view which shows the state which both the door body and the frame body are opened in the vertical opening direction. It is a perspective view which shows the state which the lower door body and the lower frame body are folded with respect to the upper door body, and the upper frame body.

Hereinafter, the present invention will be described based on each of the illustrated embodiments.

(Embodiment 1)
1 to 5 show the first embodiment of the present invention, and FIGS. 1 and 2 are views for explaining a switch gear including three connected switch gear main bodies, and FIGS. 3 and 4 are diagrams. It is a figure for demonstrating the opening / closing operation of a door body in one switch gear, and FIG. 5 is a figure for demonstrating the operation of opening a door body with respect to a switch gear main body.

The switch gear 1 is formed by connecting, for example, three switch gear main bodies 2 having an open front surface in a vertically long rectangular parallelepiped metal box.

Electrical equipment 4 such as a switchgear, a circuit breaker, a disconnector, and an installation device is housed in each switchgear main body 2, and a roof 3 is provided when the switchgear body 2 is installed outdoors.

A door body 10 is provided in the front opening 5 of the switch gear main body 2 for maintenance and inspection of the housed electrical equipment 4.

The door body 10 is composed of a frame body 11 having substantially the same size as the front opening 5 of the switch gear body 2 and a door plate 12 for opening and closing the opening of the frame body 11, and the frame body 11 is an upper edge portion of the switch gear body 2. The door plate 12 is rotatably attached to 5a via a hinge 13, and the door plate 12 is rotatably attached to the right frame portion of the frame 11 via a hinge 14.

As a result, the frame body 11 can be opened and closed vertically with respect to the switch gear body 2, and the door plate 12 can be opened and closed horizontally with respect to the frame body 11.

A gas spring 20 is provided between the side wall of the switch gear main body 2 and the frame body 11 to assist the force of the door body 10 in the vertical opening direction. That is, the gas spring 20 functions as a rotation assisting means for assisting the upward rotation of the door body 10.

Specifically, the gas spring 20 is composed of a tubular fixed portion 22 filled with gas and a rod-shaped telescopic portion 21 that can be inserted and removed from the fixed portion 22 and has a piston, and is an end portion of the telescopic portion 21. The 21a is slidably supported by the elongated hole 11a formed in the frame body 11, and the end portion 22a of the fixing portion 22 is rotatably supported by the side wall of the switch gear body 2 (see FIG. 5). ..

FIG. 5A shows a state in which the frame body 11 is closed, the end portion 21a of the expansion / contraction portion 21 is located at the upper end portion of the elongated hole 11a of the frame body 11, and the expansion / contraction portion 21 of the gas spring 20 is most contracted. The gas in the fixed portion 22 is in the most compressed state.

From this state, when the frame 11 is rotated in the opening direction, the expansion / contraction portion 21 of the gas spring 20 gradually begins to expand, and the compressed gas in the fixing portion 22 causes the frame 11 to open in the opening direction. The rotation is assisted, and the opening operation in the vertical opening direction can be lightened (FIG. 5 (b)).

Further, when the frame 11 is rotated in the opening direction, the gas in the fixing portion 22 tries to further extend the telescopic portion 21 and promotes the rotation of the frame 11 in the opening direction, and finally the frame 11 ( The door body 10) is rotated until it is in a horizontal state (FIG. 5 (c)).

Even if the door body 10 is in a horizontal state, the gas in the fixed portion 22 of the gas spring 20 has a force in the direction of extending the expansion / contraction portion 21, and therefore the door body 10 is maintained in a horizontal state and a stopper. Has a function as. In addition to the gas spring 20, a stopper for holding the open state of the door body 10 may be provided, and by doing so, the load on the gas spring 20 can be reduced.

Next, a case of maintaining and inspecting the electrical equipment 4 in the switch gear 1 will be described.

When inspecting the electrical equipment 4, first, the door plate 12 is opened sideways with respect to the frame 11 (the state of the alternate long and short dash line in FIG. 3) to enable the work of the electrical equipment 4. .. At this time, since the door plate 12 opens laterally with respect to the frame body 11, it can be opened relatively easily.

When maintaining the electrical equipment 4, for example, replacing the equipment 4, the frame 11 is opened vertically with respect to the switch gear body 2 (state in FIG. 4), and the electrical equipment 4 is taken out. To enable. Opening the frame 11 vertically means that the door plate 12 is also opened vertically together with the frame 11, and the door plate 12 is also moved upward, so that the electrical equipment 4 can be easily taken out. To. That is, when taking out the electric equipment 4, a lifter is used, and the lifter is inserted under the installed electric equipment 4 and lifted, and the lifter is backed up to take out the electric equipment 4. At this time, since there is no door body 10 (frame body 11 and door plate 12) in the front opening 5 of the switch gear main body 2, there is no obstacle to taking out the electrical equipment 4 with the lifter, and it is smooth. Allows retrieval.

In particular, in the past, since the door plate existed in the laterally opened state, the door plate hindered the lateral movement, but according to the first embodiment, the lateral movement is hindered. There is no such thing, and you can move smoothly.

Of course, at the time of inspection of the electrical equipment 4, the frame 11 may be vertically opened together with the door plate 12.

According to the first embodiment, by opening the door body 10 in the vertical opening direction, the work on the door body opened above the worker performing the inspection and maintenance work is covered, and the work is covered in rainy weather. In addition to enabling work, a large space in front of the switch gear main body 2 can be taken, and it is possible to facilitate inspection and maintenance of the electrical equipment 4, especially when replacing the equipment 4.

(Embodiment 2)
6 to 8 show the second embodiment of the present invention, and the difference between the switch gear 1A according to the second embodiment and the switch gear 1 of the first embodiment is that the door body 30 is vertically 2 It is a point that can be folded in half. Therefore, the description of the configuration equivalent to that of the first embodiment will be omitted by assigning the same reference numerals.

The frame body of the door body 30 is composed of an upper frame body 31 and a lower frame body 32, and the upper frame body 31 and the lower frame body 32 are rotatably connected via a hinge 33, and both frame bodies 31 and 32 are connected to each other. It is foldable, and has almost the same size as the front opening 5A of the switch gear body 2A with both frames 31 and 32 open, and the upper frame 31 is the upper edge of the switch gear body 2A. It is rotatably attached to the portion 5a via the hinges 36, 36.

An upper door plate 34 is rotatably attached to the upper frame 31 via hinges 37 and 37, and a lower door plate 35 is hinged 37 to the right frame of the lower frame 32. , 37 is rotatably attached.

A gas spring 20 is provided between the side wall of the switch gear main body 2A and the upper frame 31 as in the switch gear 1 of the first embodiment, and assists the force of the door body 30 in the vertical opening direction. It is designed to do.

Then, when inspecting the electric equipment 4, first, the upper door plate 34 or the lower door plate 35 is opened sideways with respect to the upper frame 34 or the lower frame 32, and the work of the electric equipment 4 is possible. Make it a state.

Although the door plates 34 and 35 are both opened horizontally with respect to the frames 31 and 32, one or both of them may be opened vertically with respect to the frames 31 and 32. It is possible to select an opening direction that is convenient for inspection of each electrical equipment 4.

When performing maintenance such as replacement of the electrical equipment 4, the door body 30 is opened vertically with respect to the switch gear main body 2A (state in FIG. 7) so that the electrical equipment 4 can be taken out. Opening the door body 30 vertically means opening the upper frame body 34 and the lower frame body 32 vertically, and the upper door plate 34 and the lower door plate 35 are also moved upward. , Makes it easy to take out the electrical equipment 4.

Then, by further rotating the lower frame body 32 with respect to the upper frame body 31 and folding both the frame bodies 31 and 32 (see FIG. 8), the switch gear body 2A of the door body 30 protrudes from the front opening 5A. The amount can be reduced, which is effective when a large number of switch gears 1A are arranged in a narrow space, for example, indoors.

In this case, the lower frame body 32 is first folded with respect to the upper frame body 31, and then the folded both frame bodies 31 and 32 are opened in the vertical opening direction with respect to the switch gear main body 2A, so that the opening operation is performed. The amount of protrusion to the front can be reduced.

According to the second embodiment, the door body 30 is divided into upper and lower frame bodies, and the lower frame body 32 is folded with respect to the upper frame body 31, so that the amount of protrusion of the switch gear body 2A to the front is increased. It becomes smaller and is effective when a large number of switch gears 1A must be arranged in a narrow space such as a room.

Since the door bodies 10 and 30 of the switch gears 1 and 1A according to the present invention are vertically opened with respect to the switch gear bodies 2 and 2A, if the door bodies 10 and 30 are opened vertically, the switch can be switched. A large space can be created in front of the gear bodies 2 and 2A, which makes it easier to perform work when inspecting and maintaining the electrical equipment 4, especially when replacing the equipment 4.

In each of the above embodiments, one door plate is provided in one frame, but the present invention is not limited to this, and a plurality of door plates are provided in one frame. You may do so. The point is that the door plate may be provided so that the inspection and maintenance can be easily performed depending on the position of the electrical equipment housed in the switch gear body. Further, when a plurality of door plates are provided, one may be a horizontally open door plate and the other may be a vertically open door plate with respect to the frame body.

1 Switch gear 2 Switch gear body 5 Front opening 5a Upper edge 10 Door body 11 Frame body 12 Door plate 13 Hinge 14 Hinge 20 Gas spring (rotation assisting means)
2A Switch gear body 5A Front opening 30 Door body 31 Upper frame body 32 Lower frame body 33 Hinge 34 Upper door plate 35 Lower door plate 36 Hinge 37 Hinge

Claims (3)

A switch gear main body having a substantially square front opening, which is a substantially rectangular parallelepiped housing body, and a door body for opening and closing the front opening are provided.
The door body
A substantially square frame that is rotatably connected to the substantially horizontally extending upper edge of the front opening via a hinge and faces the peripheral edge of the front opening.
A door plate that is rotatably connected to one side frame portion extending substantially vertically of the frame body via a hinge to open and close the opening of the frame body is provided.
A switch gear characterized by that. When the door body rotates upward, a rotation assisting means for assisting the rotation is provided.
The switch gear according to claim 1. The door body was divided into two in the vertical direction, and the door body was foldable around an axis extending substantially horizontally.
The switch gear according to claim 1 or 2, wherein the switch gear is characterized in that.

Images