WO2018142455A1

WO2018142455A1 - Switch gear

Info

Publication number: WO2018142455A1
Application number: PCT/JP2017/003374
Authority: WO
Inventors: 透木村; 恵大外池; 陽平鎗水
Original assignee: 三菱電機株式会社
Priority date: 2017-01-31
Filing date: 2017-01-31
Publication date: 2018-08-09
Also published as: JP6714108B2; JPWO2018142455A1; CN110226272A

Abstract

A switch gear according to the present invention is provided with: doors 2, 3, 4 that are fitted to the front face of a casing 1 so as to be openable/closable by a handle operation; hinge mechanisms 5 that are configured so as to allow the doors 2, 3, 4 to be rotatable, and that are provided to at least the upper end side and the lower end side of the doors 2, 3, 4; and deformation suppressors 18, 18a, 18b, 18c that are vertically arranged near edges, on the hinge mechanism sides, of the back surfaces of the doors 2, 3, 4.

Description

Switchgear

This invention relates to a metal closed switchgear, and more particularly to a door structure that can withstand a pressure increase due to an internal arc accident or the like.

In conventional switchgear, internal arc accidents caused by small animal intrusion, overvoltage, misoperation, etc., increase the pressure inside the device or cause local overheating. Give a lot of stress. *

As a conventional technique devised to withstand such a phenomenon, for example, in a switchgear in which the inside of the box is divided into a main circuit equipment room, a control equipment room, a busbar room, etc., from each room In addition, a switchgear that secures a passage that can release pressure to the ceiling of the box and includes a pressure release plate on the ceiling is disclosed. (For example, see Patent Document 1)

Also disclosed is a switchgear door lock structure in which a slide plate and a lock bolt are provided on the front door of the box, and the lock bolt is fixed when the handle is in the closed position, thereby tightening the door. (For example, see Patent Document 2)

Japanese Patent No. 36664845 (second page, FIG. 1) JP 2009-280995 (first page, FIG. 3)

In the conventional switchgear described above, when the pressure inside the switchgear rises abnormally, the internal pressure is positively released and the front door part that may come into contact with the human body when the door opens In addition, measures are taken to make the rear cover part an explosion-proof structure.

With regard to the door structure, the conventional hinge structure described above deforms the hinge part of the door. Therefore, it is necessary to increase the plate thickness and suppress the deformation of the door. There have been problems such as difficulty in handling the load during work and an increase in the weight of the entire switchgear.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a switchgear that can suppress deformation of the door with respect to internal pressure.

A switchgear according to the present invention includes a door that is attached to the front surface of a housing so as to be opened and closed by a handle operation, and a hinge mechanism that is provided at least at an upper end side and a lower end side of the door and is configured to be able to rotate the door. And a deformation suppressing body arranged in the vertical direction in the vicinity of the hinge mechanism side end portion of the back surface of the door.

According to the switchgear according to the present invention, the deformation suppression body arranged in the vertical direction is provided in the vicinity of the hinge mechanism side end portion of the back surface portion of the door, thereby suppressing the deformation of the door on the hinge mechanism side. A switchgear that can be obtained.

The switchgear concerning Embodiment 1 of this invention is shown, (a) is a front view, (b) is a sectional side view. It is a front view which shows the middle door in the switchgear concerning Embodiment 1 of this invention. It is a top view which shows the middle door in the switchgear concerning Embodiment 1 of this invention. It is a left view which shows the middle door in the switchgear concerning Embodiment 1 of this invention. It is a rear view which shows the middle stage door in the switchgear concerning Embodiment 1 of this invention. It is a perspective view of the middle door in the switchgear concerning Embodiment 1 of this invention. It is a back perspective view which shows the middle stage door in the switchgear concerning Embodiment 1 of this invention. It is a back perspective view which shows the middle stage door in the switchgear concerning Embodiment 1 of this invention. FIG. 9 is a cross-sectional perspective view taken along line AA of FIG. 8 showing a middle door in the switchgear according to Embodiment 1 of the present invention. It is a principal part expansion perspective view which shows the middle stage door in the switchgear concerning Embodiment 1 of this invention. It is a front view which shows the middle door in the switchgear concerning Embodiment 2 of this invention. It is a left view which shows the middle door in the switchgear concerning Embodiment 2 of this invention. It is a rear view which shows the middle stage door in the switchgear concerning Embodiment 2 of this invention. It is a perspective view of the middle door in the switchgear concerning Embodiment 2 of this invention. It is a back perspective view which shows the middle door in the switchgear concerning Embodiment 2 of this invention. It is a back perspective view which shows the middle door in the switchgear concerning Embodiment 2 of this invention. It is a cross-sectional perspective view in the BB line of FIG. 16 which shows the middle door in the switchgear concerning Embodiment 2 of this invention. It is a principal part expansion perspective view which shows the middle stage door in the switchgear concerning Embodiment 2 of this invention. It is a front view which shows the middle door in the switchgear concerning Embodiment 3 of this invention. It is a left view which shows the middle door in the switchgear concerning Embodiment 3 of this invention. It is a rear view which shows the middle stage door in the switchgear concerning Embodiment 3 of this invention. It is a perspective view of the middle door in the switchgear concerning Embodiment 3 of this invention. It is a back perspective view which shows the middle stage door in the switchgear concerning Embodiment 3 of this invention. It is a back perspective view which shows the middle stage door in the switchgear concerning Embodiment 3 of this invention. FIG. 20 is a cross-sectional view taken along line CC of FIG. 19 showing a middle door in the switchgear according to Embodiment 3 of the present invention. It is a principal part expansion perspective view which shows the middle door in the switchgear concerning Embodiment 3 of this invention. It is a principal part expanded sectional view which shows the middle door in the switchgear concerning Embodiment 3 of this invention. It is a perspective view which shows the displacement suppression body in the switchgear concerning Embodiment 4 of this invention. It is a perspective view which shows the displacement suppression body in the switchgear concerning Embodiment 5 of this invention. It is a perspective view which shows the displacement suppression body in the switchgear concerning Embodiment 6 of this invention. It is a characteristic view which shows the hinge mechanism side end surface displacement in the switchgear concerning embodiment of this invention.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 10 and FIG. 31. In each of the drawings, the same or equivalent members and parts will be described with the same reference numerals. 1A and 1B show a switchgear according to Embodiment 1 of the present invention, in which FIG. 1A is a front view and FIG. 1B is a side sectional view. FIG. 2 is a front view showing the middle door in the switchgear according to Embodiment 1 of the present invention. FIG. 3 is a plan view showing a middle door in the switchgear according to Embodiment 1 of the present invention. FIG. 4 is a left side view showing the middle door in the switchgear according to Embodiment 1 of the present invention. FIG. 5 is a rear view showing the middle door in the switchgear according to Embodiment 1 of the present invention. FIG. 6 is a perspective view of the middle door in the switchgear according to Embodiment 1 of the present invention. FIG. 7 is a rear perspective view showing the middle door in the switchgear according to Embodiment 1 of the present invention. FIG. 8 is a rear perspective view showing the middle door in the switchgear according to Embodiment 1 of the present invention. 9 is a cross-sectional perspective view taken along line AA of FIG. 8, showing the middle door in the switchgear according to Embodiment 1 of the present invention. FIG. 10 is an enlarged perspective view of a main part showing the middle door in the switchgear according to Embodiment 1 of the present invention. FIG. 31 is a characteristic diagram showing displacement on the hinge mechanism side end face in the switchgear according to the embodiment of the present invention.

First, the overall configuration of the switchgear will be described with reference to FIG. The metal closed switchgear is entirely covered with a metal casing 1, and the upper door 2, the middle door 3, and the lower door 4 are hinge mechanisms 5 on the front side as shown in FIG. Can be opened and closed. The upper door 2, the middle door 3, and the lower door 4 are each provided with a handle penetration hole 6a, and each handle penetration hole 6a is provided with an opening / closing handle 6.

The upper door 2 and the lower door 4 are provided with two hinge mechanisms 5 on the upper end side and the lower end side, respectively, and the middle door 3 has a total of four hinge mechanisms 5 on the center side in addition to the upper end side and the lower end side. The case where it is provided is shown.

The hinge mechanism 5 is arranged such that a hinge body 5a provided on each door sandwiches a base body 5b provided on the housing 1 from above and below, and a pivot 5c is inserted through the hinge body 5a and the base body 5b. The hinge body 5a is fixed, and the pivot 5c and the hinge body 5a are configured to be rotatable with respect to the base body 5b.

The inside of the switchgear is divided into a plurality of compartments. The inside of the upper door 2 is the control chamber 7, the inside of the middle door 3 is the circuit breaker chamber 8, the inside of the lower door 4 is the cable chamber 9, and the circuit breaker chamber 8 The upper side of the rear side is a main bus room 10.

Control room 7 stores control equipment (not shown). In the circuit breaker chamber 8, a drawer type circuit breaker 11 is housed and can be pulled out to the front side. The rear wall of the circuit breaker chamber 8 is fixedly provided with a bus-side bushing 12 having a built-in disconnection portion and a cable-side bushing 13 configured in the same manner at a predetermined interval in the vertical direction. 11 is detachable at the bushing portion.

In the main bus chamber 10, a three-phase main bus conductor 14 is supported and accommodated by a support insulator 15, and is connected to the bus side bushing 12 by a branch bus. The cable chamber 9 is a section to which the main circuit cable 16 is connected. The main circuit cable 16 is connected to the cable side bushing 13 by a branch conductor.
The internal configuration of the switchgear shown in FIG. 1 is an example of a general configuration, and is not limited to this.

Next, the phenomenon of the internal arc accident will be described with reference to FIG. The circuit breaker room 8, the cable room 9, and the main bus room 10 are assumed as parts where an internal arc accident may occur due to the invasion of small animals, overvoltage, erroneous operation, and the like. When an internal arc accident occurs, the pressure inside the apparatus rapidly increases, and an excessive pressure is applied to the exterior surface of the switchgear (upper door 2, middle door 3, lower door 4, etc.) as indicated by arrows in the figure. As a means for reducing the increase in internal pressure, a pressure relief plate 17 is provided on the ceiling of the housing 1.

Although not shown with respect to the internal pressure applied to the upper door 2, the middle door 3, and the lower door 4, there are several upper and lower positions on the handle side of the upper door 2, the middle door 3, and the lower door 4, respectively. 2, the upper door 2, the middle door 3, and the lower door 4 are fixed to the housing 1 with bolts at one location on the upper and lower middle portions of the middle door 3 and the lower door 4, respectively. This prevents the upper door 2, the middle door 3, and the lower door 4 from being opened by internal pressure.

Thus, since the upper door 2, the middle door 3, and the lower door 4 are fixed to the housing 1, there is no problem in strength, but the hinge mechanism 5 side is not fixed to the housing 1 with bolts. It has been found that the hinge mechanism 5 side of the upper door 2, the middle door 3, and the lower door 4 has low strength against internal pressure. And it discovered that the displacement of a door was large like the conventional characteristic shown in FIG. 31, and the center part side became a larger displacement compared with an upper end side and a lower end side.

In Embodiment 1 of the present invention, the upper door 2, the middle door 3, and the lower door 4 are prevented from being deformed by the internal pressure applied to the upper door 2, the middle door 3, and the lower door 4, respectively. This is characterized in that a deformation suppressing body 18 is provided on the hinge mechanism 5 side of the door 2, the middle door 3, and the lower door 4, respectively.

Hereinafter, for example, the middle door 3 will be described, but the same applies to the upper door 2 and the lower door 4, and description of the upper door 2 and the lower door 4 is omitted.

The middle door 3 includes a front surface portion 3a, a back surface portion 3b, a handle side end portion 3c, a hinge mechanism side end portion 3d, an upper end portion 3e, and a lower end portion 3f. The handle side end portion 3c, The hinge mechanism side end 3d, the upper end 3e, and the lower end 3f are all configured in a U-shaped cross section.

A deformation suppressing body 18a is arranged in the vertical direction on the hinge mechanism 5 side of the back surface portion 3b of the middle door 3, and the upper end surface 18a1 of the deformation suppressing body 18a is located closer to the center than the lower end of the uppermost hinge mechanism 5, and is deformed. The case where the lower end surface 18a2 of the suppression body 18a is located in the center part side from the upper end of the hinge mechanism 5 of the lowest end is shown. The deformation suppressing body 18a has a U-shaped cross section, and a U-shaped tip is fixed to the back surface 3b of the middle door 3 by, for example, welding.

Thus, on the hinge mechanism 5 side of the back surface portion 3b of the middle door 3, the upper end surface 18a1 is positioned closer to the center than the lower end of the uppermost hinge mechanism 5, and the lower end surface 18a2 is the upper end of the lowermost hinge mechanism 5. By providing the deformation suppressing body 18a positioned closer to the center side, the displacement on the upper end side and lower end side on the hinge mechanism 5 side of the middle door 3 is slightly larger as in the characteristics of the first embodiment shown in FIG. However, the displacement on the center side can be suppressed to be small. And the displacement amount of the upper end side by the side of the hinge mechanism 5 of the middle stage door 3, a lower end side, and the center part side can be equalized.

Therefore, the amount of deformation of the middle door 3 on the hinge mechanism 5 side can be reduced without increasing the thickness of the entire door, and the door can be made thinner and lighter, thus achieving the initial purpose. can do.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. 11 to 18. In the drawings, the same or corresponding members and parts will be described with the same reference numerals. FIG. 11 is a front view showing a middle door in a switchgear according to Embodiment 2 of the present invention. FIG. 12 is a left side view showing the middle door in the switchgear according to Embodiment 2 of the present invention. FIG. 13 is a rear view showing the middle door in the switchgear according to Embodiment 2 of the present invention. FIG. 14 is a perspective view of the middle door in the switchgear according to Embodiment 2 of the present invention. FIG. 15 is a rear perspective view showing the middle door in the switchgear according to Embodiment 2 of the present invention. FIG. 16 is a rear perspective view showing the middle door in the switchgear according to Embodiment 2 of the present invention. 17 is a cross-sectional perspective view taken along line BB of FIG. 16 showing a middle door in a switchgear according to Embodiment 2 of the present invention. FIG. 18 is an enlarged perspective view of a main part showing a middle door in a switchgear according to Embodiment 2 of the present invention.

In the first embodiment described above, the upper end surface 18a1 of the deformation suppressing body 18a is positioned closer to the center than the lower end of the uppermost hinge mechanism 5, and the lower end surface 18a2 of the deformation suppressing body 18a is the lowermost hinge mechanism 5. In the second embodiment of the present invention, the case where the upper end surface 18b1 is positioned between the uppermost hinge mechanism 5 and the lower end surface 18b2 is positioned at the center side from the upper end has been described. It is positioned between the lowermost hinge mechanism 5.

In the second embodiment, in that category, the deformation suppressing body 18b is arranged in the vertical direction on the hinge mechanism 5 side of the back surface portion 3b of the middle door 3, and the upper end surface 18b1 of the deformation suppressing body 18b is the uppermost hinge. The case where it is set as the same position as the upper end of the mechanism 5 and the lower end surface 18b2 of the deformation suppressing body 18b is set as the same position as the lower end of the lowermost hinge mechanism 5 is shown. The deformation suppressing body 18b has a U-shaped cross section, and a U-shaped tip is fixed to the back surface 3b of the middle door 3 by, for example, welding.

Thus, on the hinge mechanism 5 side of the back surface portion 3b of the middle door 3, the upper end surface 18b1 is located at the same position as the upper end of the uppermost hinge mechanism 5, and the lower end face 18b2 is located at the same position as the lower end of the lowermost hinge mechanism 5. By providing the deformation suppressing body 18b, the displacements on the upper end side, the lower end side, and the central portion side of the middle door 3 on the hinge mechanism 5 side as in the characteristics of the second embodiment shown in FIG. Compared to those of Embodiment 1 and Embodiment 1, it can be suppressed to be extremely small.

Accordingly, the amount of deformation of the middle door 3 on the hinge mechanism 5 side can be kept extremely small without increasing the thickness of the entire door, and the door can be made thinner and lighter. A switchgear that is more effective than the first mode can be obtained.

The case where the upper end surface 18b1 of the deformation suppressing body 18b is set at the same position as the upper end of the uppermost hinge mechanism 5 and the lower end face 18b2 of the deformation suppressing body 18b is set at the same position as the lower end of the lowermost hinge mechanism 5 is described. However, the upper end surface 18b1 of the deformation suppressing body 18b is positioned between the uppermost hinge mechanism 5 and the lower end surface 18b2 of the deformation suppressing body 18b is positioned between the lowermost hinge mechanism 5. It is only necessary to be positioned, and the same effect is achieved.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIGS. 19 to 27. In the drawings, the same or corresponding members and parts will be described with the same reference numerals. FIG. 19 is a front view showing a middle door in a switchgear according to Embodiment 3 of the present invention. FIG. 20 is a left side view showing the middle door in the switchgear according to Embodiment 3 of the present invention. FIG. 21 is a rear view showing the middle door in the switchgear according to the third embodiment of the present invention. FIG. 22 is a perspective view of the middle door in the switchgear according to Embodiment 3 of the present invention. FIG. 23 is a rear perspective view showing the middle door in the switchgear according to Embodiment 3 of the present invention. FIG. 24 is a rear perspective view showing the middle door in the switchgear according to Embodiment 3 of the present invention. 25 is a cross-sectional view taken along the line CC of FIG. 19 showing the middle door in the switchgear according to Embodiment 3 of the present invention. FIG. 26 is an enlarged perspective view of a main part showing a middle door in a switchgear according to Embodiment 3 of the present invention. FIG. 27 is an enlarged cross-sectional view of a main part showing a middle door in a switchgear according to Embodiment 3 of the present invention.

In the second embodiment described above, the deformation suppressing body 18b is configured such that the upper end surface 18b1 is positioned between the uppermost hinge mechanism 5 and the lower end surface 18b2 is positioned between the lowermost hinge mechanism 5. However, in the third embodiment of the present invention, the deformation suppressing body 18c has the upper end surface 18c1 positioned between the uppermost hinge mechanism 5 and the upper end portion 3e of the middle door 3, and the lower end surface 18c2 is It is positioned between the lowermost hinge mechanism 5 and the lower end portion 3f of the middle door 3.

And in Embodiment 3, the deformation | transformation suppression body 18c is arrange | positioned to the hinge mechanism 5 side of the back surface part 3b of the middle stage door 3 in the up-down direction in the category, and the upper end surface 18c1 of the deformation | transformation prevention body 18c is the middle stage door 3's. The case where it is set as the structure located in the upper end part 3e and the lower end surface 18c2 of the deformation | transformation suppression body 18c located in the lower end part 3f of the middle stage door 3 is shown. The deformation suppressing body 18c has a U-shaped cross section, and a U-shaped tip is fixed to the back surface 3b of the middle door 3 by, for example, welding.

In this way, on the hinge mechanism 5 side of the back surface portion 3b of the middle door 3, the upper end surface 18c1 is located at the upper end portion 3e of the middle door 3, and the lower end surface 18c2 is located at the lower end portion 3f of the middle door 3. By providing 18c, like the characteristic of the third embodiment shown in FIG. 31, the displacement of the middle door 3 on the upper end side, the lower end side, and the center side on the hinge mechanism 5 side is the same as that of the second embodiment described above. Even smaller can be suppressed.

Therefore, the amount of deformation of the middle door 3 on the hinge mechanism 5 side can be further reduced without increasing the thickness of the entire door, and the door can be made thinner and lighter. A switchgear that is more effective than the second mode can be obtained.

The upper end surface 18c1 of the deformation suppressing body 18c is positioned at the upper end portion 3e of the middle door 3, and the lower end surface 18c2 of the deformation suppressing body 18c is positioned at the lower end portion 3f of the middle door 3. The upper end surface 18c1 of the deformation suppressing body 18c is located between the uppermost hinge mechanism 5 and the upper end portion 3e of the middle door 3, and the lower end surface 18c2 of the deformation suppressing body 18c is the lowermost end. It is only necessary to be positioned between the hinge mechanism 5 and the lower end 3f of the middle door 3, and the same effect can be obtained.

Embodiment 4 FIG.
A fourth embodiment of the present invention will be described with reference to FIG. FIG. 28 is a perspective view showing a displacement suppressing body 18d in a switchgear according to Embodiment 4 of the present invention. In the above-described first to third embodiments, the case where the

displacement suppression bodies

18a, 18b, and 18c are configured to have a U-shaped cross section has been described. In this fourth embodiment, the displacement suppression body 18d has an arc-shaped cross section. In this case, the same effects as those of the above-described embodiments are obtained.

Embodiment 5 FIG.
A fifth embodiment of the present invention will be described with reference to FIG. FIG. 29 is a perspective view showing a displacement suppressing body 18e in a switchgear according to Embodiment 5 of the present invention. In the first to third embodiments described above, the case where the

displacement suppressing bodies

18a, 18b, and 18c are configured to have a U-shaped cross section has been described. In the fifth embodiment, the displacement suppressing body 18e has a triangular cross section. In this case, the same effects as those of the above-described embodiments are obtained.

Embodiment 6 FIG.
A sixth embodiment of the present invention will be described with reference to FIG. 30 is a perspective view showing a displacement suppressing body 18f in a switchgear according to Embodiment 6 of the present invention. In the first to third embodiments described above, the case where the

displacement suppressing bodies

18a, 18b, and 18c are configured to have a U-shaped cross section has been described. In the sixth embodiment, the displacement suppressing body 18f has a polygonal cross section. In this case, the same effects as those of the above-described embodiments are obtained.
Further, the displacement suppressing body is not limited to the configuration of each of the above-described embodiments, and although not shown in the drawings, it may be a round cylinder or a polygonal cylinder such as a square cylinder. The same effect as each embodiment is produced.

In each of the above-described embodiments, the middle door 3 has been described. However, the present invention is not limited to this, and the same can be applied to the upper door 2 or the lower door 4, and the same effect can be obtained.

In the present invention, it is possible to freely combine the respective embodiments within the scope of the invention, and to appropriately modify and omit the respective embodiments.

This invention is suitable for realizing a switchgear that can suppress deformation of the door with respect to internal pressure.

1 housing, 2 upper door, 3 middle door, 3b backside, 3d hinge mechanism side edge, 3e upper edge, 3f lower edge, 4 lower door, 5 hinge mechanism, 6 handle, 18 deformation restrainer, 18a deformation restraint Body, 18a1 upper end surface, 18a2 lower end surface, 18b deformation suppression body, 18b1 upper end surface, 18b2 lower end surface, 18c deformation suppression body, 18c1 upper end surface, 18c2 lower end surface, 18d deformation suppression body, 18e deformation suppression body, 18f deformation suppression body .

Claims

A door attached to the front surface of the housing so that it can be opened and closed by a handle operation; a hinge mechanism provided at least on the upper end side and the lower end side of the door; and configured to freely rotate the door; and a rear portion of the door A switchgear comprising a deformation suppressing body disposed in the vertical direction in the vicinity of the hinge mechanism side end.
2. The switchgear according to claim 1, wherein the deformation suppressing body has a U-shaped cross section.
2. The switchgear according to claim 1, wherein the deformation suppressing body has an arcuate cross section.
2. The switchgear according to claim 1, wherein the deformation suppressing body has an arcuate cross section.
2. The switchgear according to claim 1, wherein the deformation suppressing body has an arcuate cross section.
2. The deformation suppressing body according to claim 1, wherein an upper end surface of the deformation suppressing body is positioned closer to a center portion than a lower end of the uppermost hinge mechanism, and a lower end surface thereof is positioned closer to a center portion than the upper end of the lowermost hinge mechanism. The switchgear according to claim 5.
6. The deformation suppressing body according to claim 1, wherein an upper end surface of the deformation suppressing body is positioned between the uppermost hinge mechanism and a lower end surface thereof is positioned between the lowermost hinge mechanism. Switchgear as described in
The switchgear according to claim 7, wherein the deformation suppressing body has an upper end surface at the same position as an upper end of the uppermost hinge mechanism and a lower end surface at the same position as the lower end of the lowermost hinge mechanism.
The deformation suppressing body has an upper end surface located between the uppermost hinge mechanism and the upper end portion of the door, and a lower end surface located between the lowermost hinge mechanism and the lower end portion of the door. The switchgear according to any one of claims 1 to 5.
The switchgear according to claim 9, wherein the deformation suppressing body has an upper end surface located at an upper end portion of the door and a lower end surface located at a lower end portion of the door.