JP2011223780A - Door fixing device for metal-enclosed switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door fixing device which fixes an overall freely opening/closing door and can withstand pressure increase.SOLUTION: The door fixing device for a metal-enclosed switchgear includes: a box body 1 for accommodating storage equipment; a freely opening/closing door 2 provided on an opening of the box body 1; a hinge 3 provided at one side of the door 2; and a freely rotatable handle 4 provided at another side of the door 2. A plurality of links 24, 30 and 33 are connected to the handle 4. Upper fixing rods 5, 31 and 34 which are locked to an upper locking metal fitting fixed on the box body 1 are respectively connected to one end of the plurality of links 24, 30 and 33. Lower fixing rods 6, 32 and 35 which are locked to a lower locking metal fitting fixed on the box body 1 are respectively connected to another end of the plurality of links 24, 30 and 33.

Description

  The present invention relates to a door fixing device for a metal closed switchgear that can firmly fix an openable / closable door.

  2. Description of the Related Art Conventionally, a door that can be opened and closed is attached to the front side of a box that houses a storage device such as a vacuum circuit breaker, and internal maintenance and inspection are performed (for example, Patent Document 1). reference).

  As shown in FIG. 5, this type of metal closed type switchgear is configured such that the box 1 is divided into an upper control chamber 1a, an intermediate circuit breaker chamber 1b, and a lower cable chamber 1c.

  On the front side of the circuit breaker chamber 1b, a middle door 2 whose periphery is bent in an L-shaped cross section is provided, and a first hinge 3 is fixed to the left end in the figure. A handle 4 is provided at the right end in the figure, and can be opened and closed with the first hinge 3 as a fulcrum. A first fixed rod 5 and a second fixed rod 6 connected to the handle 4 are provided on the rear surface of the middle door 2, and can be fixed to the box 1 side when the middle door 2 is closed. . That is, the end of the first fixed rod 5 is locked to the upper part of the circuit breaker chamber 1b, and the end of the second fixed rod 6 is locked to the lower part of the circuit breaker chamber 1b.

  An upper door 7 is provided on the front side of the control chamber 1 a, a second hinge 8 is fixed to the left end in the figure, and a right bolt in the figure is fixed with a round bolt 9. This is because the bolt 9 is used because the upper door 7 is opened and closed less frequently than the middle door 2. In addition, a lower door 10 is provided on the front side of the cable chamber 1c, and four corners are fixed with hexagonal bolts 11. This is because the lower door 10 is opened and closed less frequently than the upper door 7 and the middle door 2.

JP2009-280995 (Pages 3-4, FIG. 1)

  The above-described conventional metal closure type switchgear door fixing device has the following problems. When an arc occurs in the box 1, the circuit breaker chamber 1b in which the main circuit device is arranged may cause the largest pressure increase. However, since the middle door 2 is only fixed on both sides by the first hinge 3 and the first and second fixing rods 5 and 6, the intermediate portion is easily swelled. When the intermediate portion swells, hot gas is ejected from the box body 1 from there.

  For this reason, it has been desired that the entire middle door 2 can be firmly fixed, and even if there is a pressure increase in the circuit breaker chamber 1b, it is difficult to eject high temperature gas out of the box 1.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a metal closed switchgear door fixing device that can firmly fix the entire openable and closable door and can withstand pressure rise.

  In order to achieve the above object, a door closing device for a metal closed switchgear according to the present invention includes a box for storing storage equipment, an openable / closable door provided at an opening of the box, A door fixing device for a metal closed type switchgear comprising a hinge provided on one side and a rotatable handle provided on the other side of the door, wherein a plurality of links are connected to the handle An upper fixing rod locked to an upper locking bracket fixed to the box is connected to one end of the plurality of links, and the other end of the links is connected to the box. The lower fixing rods to be locked to the fixed lower locking fittings are connected to each other.

  According to the present invention, since the plurality of positions in the width direction of the door are fixed by the plurality of fixing rods connected to the handle, the entire door can be firmly fixed and can withstand pressure rise. be able to.

The front view which shows the structure of the door fixing device of the metal closed type switchgear which concerns on Example 1 of this invention. The principal part expanded sectional view which shows the structure of the door fixing device of the metal closed type switchgear which concerns on Example 1 of this invention. The front view explaining operation | movement of the door fixing device of the metal closed type switchgear which concerns on Example 1 of this invention. The principal part expanded sectional view which shows the structure of the door fixing device of the metal closed type switchgear which concerns on Example 2 of this invention. The front view which shows the structure of the door fixing device of the conventional metal closing type switchgear.

  In the present invention, a plurality of positions in the width direction of the door are fixed by a plurality of fixing rods. Embodiments of the present invention will be described below with reference to the drawings.

  First, a door fixing device for a metal closed switchgear according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a front view showing a configuration of a door closing device for a metal closed switchgear according to a first embodiment of the present invention, and FIG. 2 is a diagram showing a door fixing device for a metal closed switchgear according to a first embodiment of the present invention. The principal part expanded sectional view which shows a structure, FIG. 3 is a front view explaining operation | movement of the door fixing device of the metal closed type switchgear which concerns on Example 1 of this invention. In addition, in each figure, the same code | symbol was attached | subjected about the component similar to the past. Moreover, FIG. 1, FIG. 3 has shown the back surface of the middle stage door part, and the whole structure of a box is the same as that of the conventional method.

  As shown in FIG. 1, the box 1 is divided into a control room 1a, a circuit breaker room 1b, and a cable room 1c. A middle door 2 whose peripheral edge is bent in an L-shaped cross section is provided at the opening of the circuit breaker chamber 1b for storing a storage device such as a vacuum circuit breaker. A first hinge 3 is fixed to the middle door 2 on one side in the vertical direction at the right end in the figure, and a rotatable handle 4 is provided on the other side in the vertical direction at the left end in the figure. The middle door 2 can be opened and closed with the first hinge 3 as a fulcrum and serves as a front door of the circuit breaker chamber 1b. One end of a first link 21 is fixed to the main shaft 20 of the handle 4, and the other end is connected to a second link 22 extending in the width direction by a movable pin 23.

  A handle portion of a T-shaped third link 24 is connected to an end portion of the second link 22 on the handle 4 side by a movable pin 25. One end of the first fixed rod 5 is provided at one end of the T-shaped head, and one end of the second fixed rod 6 is provided by the movable pins 26 and 27 at the other end of the T-shaped head. Each is connected. The other end of the first fixed rod 5 penetrates the handle 4 side end of the upper guide plate 28 movably, and the other end of the second fixed rod 6 passes the handle 4 side end of the lower guide plate 29. It penetrates freely. These configurations are the same as those of the conventional method except for the first link 21, the second link 22, the upper guide plate 28, and the lower guide plate 29.

  A handle portion of a fourth T-shaped link 30 similar to the third link 24 is connected to the intermediate portion of the second link 22 by a movable pin 25. One ends of a third fixed rod 31 and a fourth fixed rod 32 are connected to both ends of the T-shaped head by movable pins 26 and 27, respectively. The other end penetrates the middle part of the upper and lower guide plates 28 and 29 movably.

  Further, a handle portion of a T-shaped fifth link 33 similar to the third link 24 is connected to the end of the second link 22 on the side opposite to the handle 4 by a movable pin 25. One ends of a fifth fixed rod 34 and a sixth fixed rod 35 are connected to both ends of the T-shaped head by movable pins 26 and 27, respectively. The other end penetrates the upper and lower guide plates 28 and 29 on the side opposite to the handle 4 movably.

  The shapes of the third to fifth links 24, 30, and 33 are not limited to the T-shape, but may be polygonal shapes or rice ball shapes, and those having three vertices can be used.

  Next, a method of fixing the first to sixth fixing rods 5, 6, 31, 32, 34, and 35 ends to the box 1 side will be described with reference to FIG. Since these configurations are the same, description will be made using the first fixed rod 5.

  As shown in FIG. 2, a fixed plate 38 having a through hole 37 is fixed to the front plate 36 with which the upper end of the middle door 2 abuts. The first fixed rod 5 penetrates through the through hole 37 in a movable manner. A partition plate 39 is fixed to the front plate 36 and is partitioned into a control chamber 1a and a circuit breaker chamber 1b. An upper door 7 is provided on the front side of the control room 1a.

  Here, the method of fixing the first fixing rod 5 is not limited to the fixing plate 38 having the through-hole 37, but the end of the first fixing rod 5 is fitted into the U-shaped groove. But you can. Each of these is for locking the end of the first fixed rod 5 to the box 1, and the upper one is referred to as the upper locking bracket and the lower one is referred to as the lower locking bracket.

  Next, the operation will be described with reference to FIG. 1 and 2 show a state where the middle door 2 is not fixed.

  As shown in FIG. 3, when the handle 4 is rotated clockwise, the first link 21 is also rotated clockwise, and the second link 22 is moved substantially horizontally in the left direction in the figure. As a result, the third to fifth links 24, 30 and 33 all rotate clockwise as the movable pin 25 moves.

  Then, the ends of the first, third, and fifth fixing rods 5, 31, and 34 are guided by the upper guide plate 28 and pass through the through holes 37 of the upper fixing plate 38 shown in FIG. Move to the control room 1a side. At the same time, the second, fourth, and sixth fixing rods 6, 32, and 35 are guided by the lower guide plate 29, pass through the through holes of the lower fixing plate (not shown), and move toward the cable chamber 1c in the downward direction in the drawing. To do.

  Here, the first, third, and fifth fixed rods 5, 31, and 34 are referred to as upper fixed rods, and the second, fourth, and sixth fixed rods 6, 32, and 35 are referred to as lower fixed rods.

  As a result, the middle door 2 has the handle 4 side fixed by the first and second fixed rods 5 and 6, and the intermediate portion in the width direction is fixed by the third to sixth fixed rods 31, 32, 34, and 35. It is fixed to the box 1 side. That is, since the middle door 2 is fixed at the upper and lower sides, particularly the middle part by the plurality of third to sixth fixing rods 31, 32, 34, 35, the first hinge 3, first, second The entire middle door 2 including the fixing rods 5 and 6 can be firmly fixed. For this reason, it can endure the pressure rise accompanying an arc and can suppress the ejection of high temperature gas.

  In the case where the width direction is wider than the height direction, such as the middle door 2, the width direction is fixed at a plurality of places, so that the fixing effect is greatly improved. Furthermore, if the first, third, and fifth fixing rods 5, 31, and 34 and the second, fourth, and sixth fixing rods 6, 32, and 35 are arranged at equal intervals, the fixing points can be made uniform. It can be dispersed and fixed more firmly.

  According to the door locking device for the metal closed switchgear of the first embodiment, the first to sixth fixing rods 5, the second to fifth links 22, 24, 30, 33 connected to the handle 4, 6, 31, 32, 34, 35 are connected, and when the middle door 2 is closed, these are moved and fixed. Therefore, the intermediate door 2 as a whole, particularly at a plurality of intermediate portions in the width direction. Can be firmly fixed and can withstand the pressure rise.

  In the said Example 1, although the intermediate part of the middle stage door 2 was fixed with the four of the 3rd-6th fixing rod 31, 32, 34, 35, the number of a fixing rod is not limited.

  Next, a metal closure type switchgear door fixing device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an enlarged cross-sectional view showing a main part of the structure of the door fixing device for the metal closed switchgear according to the second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the degree of sealing of the door is improved. In FIG. 4, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, a shielding plate 41 having a through hole 40 through which the first fixing rod 5 passes is provided below the fixing plate 38 inside the middle door 2. The second fixed rod side has the same configuration.

  According to the door fixing device for the metal closed switchgear of the second embodiment, in addition to the effects of the first embodiment, when the middle door 2 is closed, the fixing plate 38 and the shielding plate 41 are intricately arranged. Therefore, the space between the inner side and the outer side of the middle door 2 has a maze structure, the degree of sealing is improved, and the ejection of high temperature gas can be suppressed.

DESCRIPTION OF SYMBOLS 1 Box 1a Control room 1b Circuit breaker room 1c Cable room 2 Middle door 3 First hinge 4 Handle 5 First fixed rod 6 Second fixed rod 7 Upper door 8 Second hinge 9, 11 Bolt 10 Lower door 20 Main shaft 21 1st link 22 2nd link 23, 25, 26, 27 Movable pin 24 3rd link 28 Upper guide plate 29 Lower guide plate 30 4th link 31 3rd fixed rod 32 4th fixation Rod 33 Fifth link 34 Fifth fixed rod 35 Sixth fixed rod 36 Front plate 37, 40 Through hole 38 Fixed plate 39 Partition plate 41 Shield plate

Claims (5)

A box for storing storage devices;
An openable and closable door provided at the opening of the box;
A hinge provided on one side of the door;
A door fixing device for a metal closed switchgear provided with a rotatable handle provided on the other side of the door,
A plurality of links are connected to the handle,
An upper fixing rod locked to an upper locking bracket fixed to the box is connected to one end of each of the plurality of links,
A door fixing device for a metal closed switchgear, wherein a lower fixing rod locked to a lower locking bracket fixed to the box is connected to the other end of each of the plurality of links. The link is T-shaped,
Connect the handle to the handle,
Connect the upper fixing rod to one end of the head,
2. The door fixing device for a metal closed switchgear according to claim 1, wherein the lower fixing rod is connected to the other end.   The door fixing device for a metal closed switchgear according to claim 1 or 2, wherein the door has a width direction wider than a height direction. Fix the fixing plate through which the upper fixing rod penetrates on the box side,
Fix the shielding plate through which the upper fixing rod penetrates on the door side,
The door fixing of the metal closed switch gear according to any one of claims 1 to 3, wherein when the door is closed, a labyrinth structure is formed in which the fixing plate and the shielding plate are intricate with each other. apparatus.   5. The metal closed type according to claim 1, wherein the door is a front door provided at an opening of a circuit breaker chamber in which the storage device is a vacuum circuit breaker. Switch-gear door fixing device.

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