WO2018150702A1

WO2018150702A1 - Ventilation device for switch gear

Info

Publication number: WO2018150702A1
Application number: PCT/JP2017/044438
Authority: WO
Inventors: 若林　徹; 崇嗣中山
Original assignee: 株式会社東芝; 東芝エネルギーシステムズ株式会社
Priority date: 2017-02-17
Filing date: 2017-12-11
Publication date: 2018-08-23
Also published as: JP6925820B2; JP2018133965A; PH12019501878A1; MY196150A; SG11201907498QA

Abstract

A ventilation device for a switch gear according to an embodiment of the invention is provided with a pair of support members (11) and a louver (12). The pair of support members (11) are arranged at a distance from each other and are joined to a housing (2). The louver (12) is located between the pair of support members (11) and opens and closes an opening (8c) provided in the housing (2). Either the pair of support members (11) or the opposite ends (12a, 12b) of the louver (12) in the direction (D1) in which the support members (11) are arranged are provided with protrusions (12f, 12g) protruding in the arrangement direction (D1). The pair of support members (11) or the opposite ends (12a, 12b) to which the protrusions (12f, 12g) are not provided are provided with holes (11c) in which the protrusion (12f, 12g) are inserted, and also with cylindrical surfaces (11d) facing the holes (11c). The pair of support members (11) supports the louver (12) while the protrusions (12f, 12g) and the cylindrical surfaces (11d) are engaged with each other.

Description

Switchgear ventilator

The embodiment of the present invention relates to a switchgear ventilation device.

Conventionally, a switchgear ventilation device including a support member and a louver supported by the support member is known.

JP 2016-116429 A

In this type of switchgear ventilator, for example, it is preferable if a new configuration that is easy to assemble is obtained.

The switch gear ventilation device of the embodiment includes a pair of support members and a louver. The pair of support members are arranged with a space therebetween and coupled to the housing. The louver is located between the pair of support members and opens and closes an opening provided in the housing. One of each of the pair of support members and both ends of the louvers in the direction in which the support members are arranged is provided with a convex portion that protrudes in the arrangement direction. On the other of the pair of support members and the both end portions, a hole in which the convex portion is put and a cylindrical surface facing the hole are provided. The pair of support members support the louver in a state where the convex portion and the cylindrical surface are hooked.

FIG. 1 is an exemplary schematic perspective view of a switchgear according to an embodiment. FIG. 2 is an exemplary schematic front view of the switchgear ventilation device of the embodiment. FIG. 3 is an exemplary schematic plan view of the switchgear ventilation device of the embodiment. FIG. 4 is an exemplary schematic cross-sectional view of a part of the casing of the switchgear and the ventilation device of the embodiment, and is a view in a state where the louver is in an open posture. FIG. 5 is an exemplary schematic cross-sectional view of a part of the casing of the switchgear and the ventilator according to the embodiment, and shows a state where the louver is in a closed posture. FIG. 6 is an exemplary schematic perspective view of one of the pair of support members according to the embodiment. FIG. 7 is an exemplary schematic perspective view of the other of the pair of support members according to the embodiment. FIG. 8 is an exemplary schematic front view of the louver of the embodiment. FIG. 9 is an exemplary schematic plan view of the louver of the embodiment.

Hereinafter, exemplary embodiments of the present invention will be disclosed. The configuration of the embodiment shown below, and the operation and result (effect) brought about by the configuration are examples. In the following drawings, three directions orthogonal to each other are defined for convenience. The X direction is along the front-rear direction of the housing 2, the Y direction is along the width direction of the housing 2, and the Z direction is along the height direction of the housing 2.

As shown in FIG. 1, the switch gear 1 includes a housing 2 and a ventilation device 3. The switch gear 1 is a so-called metal closed type switch gear in which a circuit breaker, a protective relay, and the like are housed in a metal housing 2. For example, the housing 2 includes a circuit breaker, an instrument transformer, a power receiving panel that mainly receives power, a load supply cable via a circuit breaker, a current transformer, a zero-phase current transformer, and the like. Feeder board from which the cable is pulled out, a bus connection board for separating the main bus by a circuit breaker for each system, and the like. The switch gear 1 is installed, for example, in an electrical room of a building. The housing 2 can also be referred to as a board or a closed box.

The housing 2 is configured, for example, in a flat rectangular parallelepiped box shape that is short in the Y direction. The housing 2 has a plurality of wall portions 2a to 2f. Each of the wall 2a and the wall 2b extends along a direction (XY plane) orthogonal to the Z direction, and is provided in parallel to each other with an interval in the Z direction. The wall 2a can be referred to as a top wall, an upper wall, or the like, and the wall 2b can be referred to as a bottom wall, a lower wall, or the like.

The wall 2c and the wall 2e both extend along a direction (YZ plane) orthogonal to the X direction, and are provided in parallel to each other with an interval in the X direction. The wall 2d and the wall 2f both extend along a direction (XZ plane) orthogonal to the Y direction, and are provided in parallel to each other with an interval in the Y direction. The wall 2c can be referred to as a front wall or the like, and the wall 2e can be referred to as a rear wall or the like. The wall portions 2c to 2f can be referred to as side wall portions, peripheral wall portions, or the like.

Further, the housing 2 is provided with an opening for work (not shown) that is opened in the X direction and is covered with a door 8 shown in FIG. The door 8 constitutes at least a part of the wall 2c. In the following, unless otherwise specified, the direction of each part of the switch gear 1 is the direction in which the door 8 is closed. The door 8 is rotatably supported by the housing 2 via a hinge portion having a rotation axis extending along an end portion 8a (Z direction) opposite to the Y direction of the door 8. The door 8 can move between a closed position (FIG. 1) for closing the opening and an open position (not shown) for opening the opening by rotating around the rotation axis.

Further, an operation portion 9 is provided at the end portion 8b of the door 8 in the Y direction. The operation unit 9 includes a lever 9a provided to be rotatable around a rotation axis extending along the X direction. For example, the lever 9a is in a downward state along the Z direction at the closed position (FIG. 1), and is in a lateral state along the Y direction at the open position. The lever 9a can also be referred to as a handle, a door knob, a gripping portion, or the like.

Also, the door 8 is provided with an opening 8c. The opening 8c is a through hole that penetrates the door 8 in the X direction. The opening 8c has a quadrangular shape when viewed in the X direction. The opening 8c is connected to, for example, a chamber in which devices constituting the main circuit of the switchgear 1 such as a circuit breaker are disposed. The opening 8c can be referred to as a ventilation opening.

The ventilation device 3 is accommodated in the housing 2 and attached to the inner surface 8d (FIG. 4) of the door 8 in a state where the opening 8c is covered so as to be opened and closed.

2 to 5, the ventilation device 3 includes a pair of support members 11, a plurality of louvers 12, and a pair of closing members 13.

As shown in FIG. 2, the pair of support members 11 are arranged at intervals in the Z direction. The pair of support members 11 are coupled (fixed) to the inner surface 8d (FIG. 4) of the door 8 by a coupling tool such as a screw. Hereinafter, the upper (one) support member 11 of the pair of support members 11 may be referred to as a support member 11A, and the lower (other) support member of the pair of support members 11 may be referred to as a support member 11B. The support member 11 </ b> A is disposed at the upper edge of the opening 8 c in the door 8, and the support member 11 </ b> B is disposed at the lower edge of the opening 8 c in the door 8. The support member 11A and the support member 11B are symmetrical with respect to an XY plane (not shown) located in the middle of each other.

As shown in FIGS. 6 and 7, each support member 11 has two

wall portions

11a and 11b, and is configured in a substantially L shape when viewed along the Y direction. The

wall portions

11a and 11b can also be referred to as plate portions.

Each of the

wall portions

11a and 11b is configured in a belt shape whose longitudinal direction is along the alignment direction D1 (FIG. 2) of the pair of support members 11. Specifically, both of the

wall portions

11a and 11b are configured in a belt shape whose longitudinal direction is along the width direction of the housing 2, that is, the Y direction. The wall 11a extends along the inner surface 8d of the door 8. The wall portion 11 a is coupled to the door 8 in a state where the wall portion 11 a is overlaid on the inner surface 8 d of the door 8. Further, the wall portion 11 b extends from the end portion of the wall portion 11 a in a direction away from the inner surface 8 d of the door 8, that is, inward of the housing 2. Specifically, in the support member 11A, the wall portion 11b extends from the lower end portion of the wall portion 11a, and in the support member 11B, the wall portion 11b extends from the upper end portion of the wall portion 11a.

Further, the wall 11b is provided with a plurality of holes 11c. The plurality of holes 11c are arranged at intervals in an intersecting direction D2 that intersects the arranging direction D1 of the pair of support members 11. In the present embodiment, the intersecting direction D2 is along the longitudinal direction of the wall portion 11b, that is, the Y direction. Each hole 11c is a through-hole penetrating the wall portion 11b in the thickness direction of the wall portion 11b, that is, in the Z direction. The hole 11c has a quadrangular (polygonal) cross section perpendicular to the hole central axis. That is, the holes 11c have a quadrangular shape when viewed along the alignment direction D1. The wall portion 11b is provided with a cylindrical surface 11d facing the hole 11c for each hole 11c. Accordingly, the plurality of cylindrical surfaces 11d are arranged at intervals in the intersecting direction D2 intersecting the arranging direction D1 of the pair of support members 11. The cylindrical surface 11d has a quadrangular (polygonal) cross section orthogonal to the cylinder center axis. That is, the cylindrical surface 11d has a quadrangular shape when viewed along the alignment direction D1. The hole 11c and the cylindrical surface 11d are provided for each louver 12. The hole 11c and the cylindrical surface 11d may have other shapes. For example, the holes 11c and the cylindrical surface 11d may have a polygonal shape other than a rectangular shape when viewed along the alignment direction D1.

As shown in FIGS. 2, 4, and 5, the plurality of louvers 12 are arranged in the intersecting direction D <b> 2 that intersects the array direction D <b> 1 of the pair of support members 11. The plurality of louvers 12 are positioned between the pair of support members 11 and open and close the opening 8 c of the housing 2. Each louver 12 is supported by a pair of support members 11 so that the posture can be changed between an open posture (FIG. 4) for opening the opening 8c and a closed posture (FIG. 5) for closing (covering) the opening 8c. Yes.

As shown in FIGS. 8 and 9, the louver 12 has both

end portions

12a and 12b in the intersecting direction D2, a plate-like portion 12c,

extended portions

12d and 12e, and

convex portions

12f and 12g. .

The plate-like portion 12c extends in the alignment direction D1 (Z direction) and is provided across both

end portions

12a and 12b. That is, the plate-like portion 12c includes at least a part of both

end portions

12a and 12b. The plate-like portion 12c also extends in the intersecting direction D2 (Y direction). The plate-like part 12c is configured in a bent shape. The thickness of the plate-like part 12c is about 2 mm, for example. The thickness of each part of the louver 12 may be about 2 mm. The thickness of the plate-like portion 12c and the louver 12 may be other than the above.

The extending

portions

12d and 12e are provided at both

end portions

12a and 12b. The extending

portions

12d and 12e extend from the end of the plate-like portion 12c in the direction opposite to the Y direction in the direction opposite to the Y direction.

The

convex portions

12f and 12g are provided at both

end portions

12a and 12b. The

convex portions

12f and 12g protrude from the extending

portions

12d and 12e along the alignment direction D1. Specifically, the convex portion 12f projects in the Z direction from the end portion of the extending portion 12d in the Y direction opposite to the Y direction, and the convex portion 12g extends from the end portion of the extending portion 12e in the Y direction opposite to the Z direction. Protrudes in the direction. The

protrusions

12f and 12g have a quadrangular (polygonal) cross section perpendicular to the protruding direction of the

protrusions

12f and 12g. That is, the

convex portions

12f and 12g have a quadrangular shape when viewed along the alignment direction D1.

The

convex portions

12 f and 12 g are put in the holes 11 c of the pair of support members 11. Specifically, the convex portion 12f is put in the hole 11c of the support member 11A (FIG. 4), and the convex portion 12g is put in the hole 11c of the support member 11B. The

convex portions

12f and 12g and the cylindrical surface 11d are hooked to each other. In this state, the projecting

portions

12 f and 12 g and thus the louver 12 are prevented from rotating with respect to the pair of support members 11 by the cylindrical surface 11 d. In this state, the louver 12 is supported by the pair of

support members

11A and 11B.

As can be seen from FIGS. 2 to 5, the pair of closing members 13 are provided between the louver 12 located at the ends (both ends) of the cross direction D2 and the door 8 (housing 2) among the plurality of louvers 12. The space between the louver 12 and the door 8 is closed. The closing member 13 is configured in a plate shape. Each closing member 13 has a plurality of plate members 13a stacked on each other and coupled to each other. The closing member 13 is coupled (fixed) to the inner surface 8d of the door 8 by a coupling tool such as a screw.

In the above configuration, when the switch gear 1 is normal, the louvers 12 of the ventilation device 3 are in the open posture (FIG. 4). At this time, a gap S (air passage) between adjacent louvers 12 communicates with the opening 8 c of the door 8. In this state, ventilation (ventilation) of the casing 2 is performed or heat in the casing 2 is released outside the casing 2 through the gap S between the adjacent louvers 12. On the other hand, when a high-temperature or high-pressure gas is generated in the housing 2 due to an abnormality or the like and the pressure in the housing 2 increases, the plate-like portion 12c of the louver 12 disappears, that is, approaches the opening 8c. Transforms into Due to the deformation, the louver 12 overlaps with the adjacent louver 12 or the closing member 13 in a state where the louver 12 is in contact with the adjacent louver 12 or the closing member 13 (FIG. 5). As a result, the opening 8c is closed by the plurality of louvers 12. As described above, in the present embodiment, the two adjacent louvers 12 are deformed as the pressure in the housing 2 increases, and overlap each other while being in contact with each other (FIG. 5). Thereby, it is suppressed that the generated gas is ejected from the opening 8c to the outside of the housing 2.

Next, the assembly method (attachment method) of the ventilation device 3 will be described. First, the operator puts the

convex portions

12 f and 12 g of the louver 12 into the holes c provided in the pair of support members 11, and sandwiches the louver 12 between the pair of support members 11. Next, the pair of support members 11 sandwiching the louver 12 is coupled to the door 8 by a coupling tool. Next, the closing member 13 is coupled to the door 8 by a coupling tool. In addition, after couple | bonding the closing member 13 with the door 8, you may couple | bond a pair of support member 11 with the door 8 with a coupling tool. In such an assembling method, for example, welding work is unnecessary.

As described above, in the present embodiment, the ventilator 3 is arranged between the pair of support members 11 that are arranged at a distance from each other and coupled to the housing 2 and between the pair of support members 11. 2 and a louver 12 that opens and closes an opening 8c provided in 2. Further, each of the pair of support members 11 and one of the

end portions

12a and 12b of the louver 12 in the arrangement direction D1 of the pair of support members 11 (for example, both

end portions

12a and 12b of the louver 12) are provided with

convex portions

12f, 12g is provided. Further, the surface of the hole 11c and the hole 11c in which the

convex portions

12f and 12g are inserted in the other of the pair of

support members

11A and 11B and the other end (a pair of

support members

11A and 11B as an example). And a cylindrical surface 11d. The pair of

support members

11A and 11B support the louver 12 in a state where the

convex portions

12f and 12g and the cylindrical surface 11d are hooked. Therefore, according to the present embodiment, for example, in a state where the

protrusions

12f and 12g are inserted into the hole 11c and the louver 12 is sandwiched between the pair of support members 11, the louver 12 is supported by the pair of support members 11, It does not fall off from the pair of support members 11. Therefore, the ventilation device 3 is easy to assemble.

Further, in the present embodiment, since the

convex portions

12f and 12g are put in the hole 11c, the louver 12 is accurately aligned with the pair of support members 11. Thereby, position adjustment of the louver 12 with respect to a pair of support member 11 can be made unnecessary.

In the present embodiment, the ventilator 3 includes a plurality of louvers 12 arranged in an intersecting direction D2 that intersects the array direction D1, and a louver 12 and a housing that are located at the end of the intersecting direction D2 among the plurality of louvers 12. And a closing member 13 that closes the gap between the two. Therefore, according to the present embodiment, for example, the closing member 13 can suppress the outflow of gas from between the louver 12 located at the end of the cross direction D2 and the housing 2 among the plurality of louvers 12. .

In the present embodiment, the two adjacent louvers 12 are deformed as the pressure in the housing 2 increases, and overlap each other in contact with each other. Therefore, according to this embodiment, when the pressure of the housing | casing 2 increases, it can suppress that gas flows out between the adjacent louvers 12, for example.

Further, in the present embodiment, the thickness of the plate-like portion 12c is, for example, about 2 mm. Therefore, the plate-like portion 12c is easily deformed due to an increase in pressure in the housing 2.

In this embodiment, each of the pair of

support members

11A and 11B is provided with a hole 11c and a cylindrical surface 11d, and both

ends

12a and 12b of the louver 12 are provided with

convex portions

12f and 12g. Although illustrated, it is not limited to this. That is, the

convex portions

12f and 12g may be provided on each of the pair of

support members

11A and 11B, and the holes 11c and the cylindrical surface 11d may be provided on both

end portions

12a and 12b of the louver 12.

In the present embodiment, the configuration in which the ventilator 3 is provided on the door 8 is exemplified, but the present invention is not limited thereto. For example, the ventilation device 3 may be provided in a portion other than the door 8 of the housing 2.

As mentioned above, although embodiment of this invention was illustrated, the said embodiment is an example to the last, Comprising: It is not intending limiting the range of invention. The above embodiment can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. The above embodiments are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof. The present invention can be realized by configurations other than those disclosed in the above embodiments, and various effects (including derivative effects) obtained by the basic configuration (technical features) can be obtained. is there. In addition, the specifications of each component (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) should be changed as appropriate. Can do.

Claims

A pair of support members that are spaced apart from each other and coupled to the housing;
A louver located between the pair of support members, for opening and closing an opening provided in the housing;
With
One of each of the pair of support members and both ends of the louvers in the direction in which the support members are arranged is provided with a convex portion that protrudes in the arrangement direction,
On the other of each of the pair of support members and the both ends, a hole in which the convex portion is put and a cylindrical surface facing the hole are provided,
The pair of support members is a switchgear ventilation device that supports the louver in a state where the convex portion and the cylindrical surface are hooked.
A plurality of the louvers arranged in a crossing direction intersecting the rowing direction;
A closing member for closing a space between the louver and the housing located at an end in the intersecting direction among the plurality of louvers;
The switchgear ventilation device according to claim 1, comprising:
A plurality of the louvers arranged in a crossing direction intersecting with the arranging direction;
The switchgear ventilation device according to claim 1 or 2, wherein the two adjacent louvers are deformed with an increase in pressure in the casing and overlap each other in contact with each other.