JPH09182222A - Ventilation device of switch gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with the work space at the inspection and replacement of ventilation fan, and also, enable the work to be executed easily and besides safely without power stoppage, by providing the ceiling board of a switch gear box with an ventilation box which has an opening at the front, and enabling the ventilation fan to be drawn out forward from this opening. SOLUTION: A ventilation box 21 is mounted on the ceiling box 6 of the switch gear body 2, where a heater is accommodated, of a transformer or the like, and a ventilation fan 35 sucks hot air within the body 2 through a ventilation port 7, and discharges it to outside through an exhaust port 27, and also introduces chill into the body 2 from the air intake 4 of a door 3 so as to suppress the temperature rise within the body 2. This is arranged so that the ventilation fan 35 can be drawn out frontward from the opening 24 along the support board 32 together with a mounting board 12, removing the front board 43 from the ventilation box 21 at the inspection and replacement of the ventilation fan 35. This obviates the necessity of space for inspection and replacement of the ventilation fan 35, and also the inspection and replacement work of the ventilation fan 35 can be performed easily and safely without power stoppage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided on a ceiling plate of a switchgear body in which a heat generating device such as a transformer is housed.
The present invention relates to a switchgear ventilation device for ventilating the inside of a main body.

[0002]

2. Description of the Related Art A conventional switchgear ventilation system,
5A and 5B showing a right side view and a partly cutaway plan view.
This will be described with reference to FIG. In these figures, 1 is a base, 2 is a switchgear main body which is installed on the base 1 and whose front and rear surfaces are opened, and in which a heat generating device such as a transformer is housed. 3 is a door that closes the front and rear openings of the main body 2, 4 is an intake port formed at the bottom of the door 3,
Is a frame on the upper side of the main body 2, and 6 is a ceiling plate mounted on the upper surface of the frame 5.

Reference numeral 7 is a ventilation port formed in the ceiling plate 6, 8 is a ventilation box provided in the ceiling plate 6 and covering the ventilation port 7 and having a rectangular horizontal section, 9 is a lower flange of the ventilation box 8, and 10 is A bolt that penetrates the flange 9 and is screwed into the ceiling plate 6, and the ventilation box 8 is attached to the top plate 6 by the bolt 10.
Reference numeral 11 denotes a square-shaped frame-shaped support plate fixed to the inner surface of the ventilation box 8, reference numeral 12 denotes a square-shaped frame-shaped mounting plate to which a ventilation fan 13 is mounted, and 14 penetrates the mounting plate 12 to support the support plate 11. The bolts are screwed together, and the mounting plate 12 is detachably attached to the support plate 11.

Reference numeral 15 designates a plurality of metal fittings fixed to the upper part of the outer surface of the ventilation box 8, 16 is a cover plate located above the ventilation box 8, and 17 is formed by bending downward from the peripheral edge of the cover plate 16. The bent plate 18 is a bolt that penetrates the bent plate 17 and has the cover plate 16 detachably attached to the tip of the mounting member 15, and 19 is formed between the upper end of the ventilation box 8 and the cover plate 16. It is an exhaust path that communicates with the outside.

Then, the ventilation fan 13 sucks up the air in the main body 2 warmed by the heat-generating device from the ventilation port 7, exhausts it to the outside through the exhaust passage 19, and
Cold air from the outside flows into the main body 2 through the intake port 4 of the door 3, and the rise in temperature inside the main body 2 is suppressed.

Next, when inspecting and replacing the ventilation fan 13,
An operator climbs to the ceiling plate 6, removes the bolt 18, and removes the lid plate 16
Is removed from the mounting bracket 15 and lifted, and further, the bolt 14 is removed to remove the mounting plate 12 from the support plate 11,
The ventilation fan 13 is lifted up and taken out from the upper opening of the ventilation box 8. Note that the inspection and replacement work is performed live because the switchgear cannot easily lose power.

[0007]

In the case of the above-mentioned conventional apparatus, the lid plate 16 is lifted when the ventilation fan 13 is inspected or replaced. Therefore, as shown in FIG. 5A, as shown in FIG. Alternatively, there is a problem that a space L for inspection and replacement is required between the cable rack and the cable rack.

Moreover, the work of attaching and detaching the mounting plate 12 and the support plate 11 must be performed from the upper opening of the ventilation box 8, which is difficult.

Further, since the switchgear cannot easily lose power, and the ventilation fan 13 is inspected and replaced in a live state, bolts, tools, etc. fall into the main body 2 from the ventilation opening 7 during the work, and a short circuit occurs. However, there is a problem that it is dangerous due to accidents such as

In consideration of the above points, the present invention eliminates the need for a space for inspection and replacement of the ventilation fan, and allows the ventilation and inspection of the ventilation fan to be easily and safely performed without interruption in the ventilation of the switchgear. The purpose is to provide a device.

[0011]

In order to solve the above problems, a switchgear ventilation device according to the present invention includes a ventilation opening formed in a ceiling plate of a switchgear body and a ventilation opening provided in the ceiling plate. A ventilation box with a cover and an opening on the front, exhaust holes provided on both sides of the ventilation box, front and rear support plates fixed to both sides of the inner surface of the ventilation box, and a ventilation fan are attached. Is mounted on the support plate and is inserted in and out of the opening, the holding plate provided on the rear part of the inner surface of the ventilation box and above the rear part of the mounting plate, and the front part of the mounting plate. It is provided with a bolt penetrating the front portion of the support plate and having a mounting plate detachably attached to the support plate, and a front plate having an opening detachably covered.

Therefore, when inspecting or replacing the ventilation fan, the front plate can be removed from the front of the ventilation box, the bolts can be removed from the opening of the front, and the ventilation fan can be pulled out forward from the opening along the support plate together with the mounting plate. Since there is no need for space to inspect and replace the ventilation fan, bolts and tools do not fall into the main body from the ventilation port, so inspection and replacement work of the ventilation fan is easy and safe without interruption. You can do it.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 showing a partially broken right side view and FIG. 2 showing a front view with a part of FIG. 1 removed and an enlarged view of a part of FIG. 1 according to one embodiment of the present invention. This will be described with reference to FIG. 4, which is a partially cutaway plan view of FIGS. 3 and 2. In these drawings, the same symbols as those in FIG. 5 indicate the same or corresponding ones, and the different points are as follows.

Reference numeral 21 denotes a ventilation box provided on the ceiling plate 6 and covering the ventilation port 7 and having a quadrangular horizontal cross section. Reference numeral 22 denotes attachment pieces provided on the lower portions of both sides of the ventilation box 21 outwardly. Reference numeral 23 denotes attachment pieces 22.
Is a bolt that penetrates through the
A ventilation box 21 is attached to the ceiling plate 6 by 3. 24
Is an opening formed on the front surface of the ventilation box 21, 25 is an exhaust port formed on the upper side of both sides of the ventilation box 21, 26 is an exhaust plate covering the exhaust port 25, and 27 is an exhaust plate 26. The plurality of exhaust holes 28 are top plates fixed to the upper surface of the ventilation box 21.

Reference numeral 29 is a protective plate with a ventilation hole fixed to the bottom of the ventilation box 21, reference numeral 30 is an attachment body fixed to the inner surface of the ventilation box 21 whose plane is an inverted U shape, and a rear plate 31 in the left-right direction. The rear plate 31 includes front and rear support plates 32 that extend forward from both ends of the rear plate 31. Reference numeral 33 is a holding plate formed on the upper side of the rear plate 31 by bending the rear end of the rear plate 31 forward, and 34 is a screw hole formed in the front part of the support plate 32.

Reference numeral 35 is a ventilation fan, 36 is a square-shaped support frame above the ventilation fan 35, 37 is a vertical support rod fixed to a corner of the lower surface of the support frame 36, and 38 is a space between the lower end portions of the support rods 37. A horizontal supporting rod fixed in a square shape, 39 is a diagonal supporting rod fixed diagonally between the lower ends of the supporting rods 37, 40 is a motor supported by the diagonal supporting rod 39,
41 is a wing fixed to the rotating shaft of the motor 40.

Then, the support rods 37, 3 of the ventilation fan 35.
8, 39 are inserted into the mounting plate 12 from above, the support frame 36 is mounted on the mounting plate 12 with bolts, and both side portions of the mounting plate 12 are placed on the support plates 32 on both sides of the mounting body 30. The rear part is placed on the rear plate 31, and the holding plate 33 is located above the rear part of the mounting plate 12.

Reference numeral 42 denotes a bolt penetrating the front portion of the mounting plate 12 and screwed into a screw hole 34 of the support plate 32. The mounting plate 12 is detachably mounted on the support plate 32 by the bolt 42. The upper side of the rear part is held down by the holding plate 33, and the ventilation fan 35 is fixed via the mounting plate 12.

Reference numeral 43 denotes a front plate provided on the front surface of the ventilation box 21, reference numeral 44 denotes a plurality of bolts penetrating the peripheral portion of the front plate 43, and screw holes 45 at the peripheral portion of the opening 24 of the ventilation box 21.
The front plate 43 is detachably attached to the front surface of the ventilation box 21, and the opening 24 is covered by the front plate 43. Reference numeral 46 is a handle of the front plate 43.

Then, the ventilation fan 35 sucks up the air in the main body 2 warmed by a heat generating device such as a transformer from the ventilation port 7, exhausts it to the outside through the exhaust hole 27, and cools the outside air. It flows into the main body 2 through the intake port 4 of the door 3 and suppresses the temperature rise in the main body 2.

When the ventilation fan 35 is inspected or replaced,
Remove the bolt 44 and remove the front plate 4 as shown by the chain line in FIG.
3 is removed from the front of the ventilation box 21, and the front opening 24
Remove the bolt 42 from the mounting plate 12 and the ventilation fan 35
Is pulled out forward from the opening 24 along the support plate 32.

Therefore, a space for inspecting and replacing the ventilation fan 35 is not required, and bolts, tools and the like do not drop from the ventilation port 7, and the inspection and replacement work of the ventilation fan 35 can be easily performed without interruption. And it can be done safely.

[0023]

Since the present invention is constructed as described above, it has the following effects. In the switchgear ventilation device according to the present invention, the ventilation port 7 of the ceiling plate 6 is covered with a ventilation box 21 having an opening 24 on the front surface thereof.
The support plates 32 in the front-rear direction are fixed to both side portions of the inner surface of 1, and the mounting plate 12 to which the ventilation fan 35 is attached is inserted through the opening 24 so that the mounting plate 12 can be inserted and removed freely. Then, the pressing plate 33 is positioned above the rear portion of the mounting plate 12, and the bolt 4 that penetrates the front portion of the mounting plate 12 into the support plate 32 is used.
2 to detachably mount the front plate 43 to the opening 2
Since 4 is detachably covered, the front plate 43 is removed from the front of the ventilation box 21 when the ventilation fan 35 is inspected or replaced.
The bolt 42 can be removed from the front opening 24, and the ventilation fan 35 can be pulled out forward from the opening 24 along the support plate 32 together with the mounting plate 12, thus eliminating the need for space for inspection and replacement of the ventilation fan 35. At the same time, it is possible to prevent the bolts, tools, etc. from falling into the main body 2 from the ventilation opening 7, and the work of inspecting and replacing the ventilation fan 35 can be easily and safely performed without interruption.

[Brief description of the drawings]

FIG. 1 is a partially cutaway right side view of an embodiment of the present invention.

FIG. 2 is a front view with a part of FIG. 1 removed.

FIG. 3 is an enlarged view of a part of FIG. 1;

FIG. 4 is a cutaway plan view of a portion of FIG.

5A is a right side view of a section of a conventional example, and B is a plan view of a part of FIG. 5A.

[Explanation of symbols]

 2 Switchgear body 6 Ceiling plate 7 Ventilation port 12 Mounting plate 21 Ventilation box 24 Opening 27 Exhaust hole 32 Support plate 33 Holding plate 35 Ventilation fan 42 Bolt 43 Front plate

Claims (1)

[Claims] 1. A ventilation opening formed in a ceiling plate of a switchgear body, a ventilation box provided in the ceiling plate, covering the ventilation opening, and having an opening at the front, and provided on both side surfaces of the ventilation box. Attached exhaust vents, front and rear support plates fixed to both sides of the inner surface of the ventilation box, and a ventilation fan. Both sides are placed on the support plate and are inserted into and removed from the openings. A mounting plate, a holding plate provided on the rear part of the inner surface of the ventilation box and located above the rear part of the mounting plate, and penetrates through the front part of the mounting plate and the front part of the support plate to support the support plate. A switchgear ventilation device comprising a bolt having a mounting plate detachably mounted on the plate, and a front plate detachably covering the opening.