KR20200117150A - Top cover for switchboard - Google Patents

Abstract

The present invention relates to an upper cover of a switchboard which can increase ventilation and watertight properties. The upper cover of a switchboard comprises: an upper plate provided with a plurality of through holes penetrating vertically; a lower plate spaced apart from the upper plate at a lower portion of the upper plate and provided with the plurality of through holes arranged to be staggered with the through holes of the upper plate; and a first burring unit protruding upward from a periphery of the through hole of the lower plate and preventing water introduced through the through hole of the upper plate from flowing into the through hole of the lower plate.

Description

Top cover for switchboard

The present invention relates to an upper cover of a switchboard, and more particularly, to an upper cover of a switchboard capable of easily discharging arc pressure while improving ventilation.

In general, switchboards receive high-voltage electricity, reduce pressure appropriately for the load of each customer, and then switch and busbars such as instruments, relays, transformers, circuit breakers, disconnectors, etc. to monitor and control electric devices or circuits for distribution. The lamp is concentrated in one place and installed.

The switchboard consists of a compartment structure divided by a grounded metal or insulating partition to isolate and accommodate the units listed above.

Due to the nature of the switchboard, due to its closed structure, gases such as high-temperature and high-pressure steam or smoke are generated when an accident involving an arc or flashover of the power system occurs, and the generation of such gases has a problem of damaging the devices or circuits inside the switchboard.

Therefore, the switchboard is applied with an upper cover including a pressure discharge port so that the generated gas can be quickly discharged.

The top cover of a conventional switchboard is described in detail in Registration Patent No. 10-1169572 (registered on July 24, 2012, a cover device for a switchboard pressure relief port) of the applicant of the present invention.

The cover device described in the above registered patent includes a support frame formed of a support frame protruding around a pressure relief port, and a supporter having a plurality of ventilation through holes around a sidewall, and a cover plate that rotates and hinges with the supporter while covering the upper part of the supporter. , A mesh plate attached to the support frame to ventilate air through a ventilation hole, and one side of the supporter and one side of the cover plate are hinged to each other so that the cover plate rotates and opens by the energy pressure inside the switchboard when there is no arc. Including a hinge part, it is configured to protect the interior of the switchboard against water falling from the top, meet protection against dust, and prevent accidents caused by an increase in internal temperature by adopting a ventilation structure.

The upper cover of the switchboard having such a configuration has excellent ventilation and protection inside the switchboard against water, but the structure is relatively complex, and there is a need for improvement to a simpler structure.

The problem to be solved by the present invention in consideration of the above problems is to provide an upper cover of a switchboard capable of improving ventilation and watertight characteristics while using a simpler structure.

In addition, the present invention proposes a structure capable of injection molding, and provides an upper cover of a switchboard that can reduce production costs through standardization and standardization.

The top cover of the switchboard of the present invention for solving the above technical problem is a top plate provided with a plurality of through holes penetrating up and down, and spaced apart from the top plate at a lower portion of the top plate, and disposed to be alternately with the through holes of the top plate. It may include a lower plate having a plurality of through holes, and a first burring portion protruding upward from the periphery of the through holes of the lower plate and preventing water introduced through the through holes of the upper plate from flowing into the through holes of the lower plate.

In an embodiment of the present invention, it may further include a second burring portion protruding downward around the through hole of the upper plate.

In an embodiment of the present invention, the height of the first burring portion may be higher than the height of the second burring portion.

In an embodiment of the present invention, a blocking portion protruding upwardly at the edge of the lower plate to block the inflow of external water, and a drain hole formed on the blocking portion to discharge external water flowing into the lower plate may be further included. I can.

In an embodiment of the present invention, the lower plate may include a folded portion, and when the internal pressure of the switchboard increases, a part of the lower plate coupled to the upper plate may be opened by the internal pressure.

In an embodiment of the present invention, one side of the lower plate based on the foldable part becomes a fixing part that is firmly fixed to the upper side of the switchboard by bolts, and the other part of the lower plate excluding the fixing part is caused by an increase in internal pressure of the switchboard. Accordingly, it can be fastened with PC screws that can be easily damaged. In an embodiment of the present invention, a cover plate material covering an upper portion of the switchboard and having one or more pressure relief ports formed thereon may be further included, and the lower plate coupled with the upper plate may be coupled to the pressure relief port.

In an embodiment of the present invention, it may further include a gap maintaining portion between the upper plate and the lower plate.

In an exemplary embodiment of the present invention, the cover plate may include a folded portion and partially open when the internal pressure of the switchboard increases.

The present invention is a simple configuration of the upper plate and the lower plate of the burring structure, there is an effect that can improve ventilation and watertightness.

In addition, according to the present invention, the upper and lower plates of the burring structure are standardized and standardized so that they can be manufactured by an injection molding method, thereby reducing production cost and improving productivity.

1 is a closed perspective view of an upper cover of a switchboard according to a preferred embodiment of the present invention.
FIG. 2 is a perspective view of FIG. 1 in an open state.
3 is an AA cross-sectional view in FIG. 1.
4 is a partial cross-sectional view of an edge of an upper cover according to another embodiment of the present invention.
5 is an exploded perspective view of an upper cover of a switchboard according to another embodiment of the present invention.
Figure 6 is a perspective view of the combined state of Figure 5;
7 is a detailed perspective view of the pressure relief cover in FIG. 5.

In order to fully understand the configuration and effects of the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms and various modifications may be added. However, the description of the present embodiment is provided to complete the disclosure of the present invention, and to fully inform a person of ordinary skill in the art to which the present invention belongs. In the accompanying drawings, for convenience of description, the size of the components is enlarged compared to the actual size, and the ratio of each component may be exaggerated or reduced.

Terms such as'first'and'second' may be used to describe various elements, but the elements should not be limited by the above terms. The above terms may be used only for the purpose of distinguishing one component from other components. For example, without departing from the scope of the rights of the present invention, the'first element' may be referred to as the'second element', and similarly, the'second element' may also be named as the'first element'. I can. In addition, expressions in the singular include plural expressions unless clearly expressed otherwise in context. Unless otherwise defined, terms used in the embodiments of the present invention may be interpreted as meanings commonly known to those of ordinary skill in the art.

Hereinafter, a top cover of a switchboard according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a closed perspective view of an upper cover of a switchboard according to a preferred embodiment of the present invention, FIG. 2 is an open perspective view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line A-A in FIG.

Referring to FIGS. 1 to 3, respectively, a switchboard upper cover according to a preferred embodiment of the present invention includes a lower plate 10 having a plurality of through holes 11 formed therein, and having a folded portion 13 formed at one end thereof, and the lower plate ( A plurality of through holes 21 formed to cross the through holes 11 of 10) are formed, and comprise an upper plate 20 spaced apart from the upper surface of the lower plate 10 and fixed with a fixing bolt 50 .

The periphery of the through hole 11 of the lower plate 10 is formed with a first burring 12 protruding upward, and the periphery of the through hole 21 of the upper plate 20 protrudes downward (22) is formed.

Hereinafter, the configuration and operation of the switchboard top cover according to a preferred embodiment of the present invention configured as described above will be described in more detail.

First, the lower plate 10 and the upper plate 20 may each be a metal plate. The through holes 11 and 21 of each of the lower plate 10 and the upper plate 20 may be manufactured through burring, and at this time, the first burring part 12 is located around the through holes 11 and 21 by burring processing. ) And the second burring part 22 are respectively formed.

In the above, each of the lower plate 10 and the upper plate 20 has been described as a metal plate, but may be a resin material. In this case, each of the lower plate 10 and the upper plate 20 is injection-molded to form the first burring part 12 and the second The burring portion 22 and the through holes 11 and 21 can be easily formed.

The lower plate 10 and the upper plate 20 are coupled to each other by fixing bolts 50 so that the first burring portion 12 and the second burring portion 22 face each other. The operation of the first burring portion 12 and the second burring portion 22 will be described in more detail later.

The lower plate 10 is fixed to the upper side of the switchboard, and the fixing at this time is made by two different fastening materials.

As for the lower plate 10, the right part of the foldable part 13 is firmly fixed to the upper side of the switchboard by bolts 30, and the left part of the foldable part 13 is inside the switchboard by an arc. It is fastened with a PC screw 40 that can be easily damaged with an increase in pressure.

That is, one side of the lower plate 10 based on the foldable part 13 becomes a fixed part fixed to the switchboard, and the other part of the lower plate 10 except the fixed part becomes an opening/closing part that opens and closes from the upper side of the switchboard, arc As the internal pressure of the switchboard is increased, the opening and closing unit is opened to relieve the pressure.

In the present invention configured as described above, as shown in FIG. 3, air may be circulated through the through holes 11 and 21 provided in each of the lower plate 10 and the upper plate 20. The through holes 11 and 21 are arranged to be staggered in a diagonal direction instead of perpendicular to each other.

Therefore, it is possible to circulate internal air and external air of the switchboard to each other and prevent external water from flowing into the switchboard.

In the present invention, the lower plate 10 and the upper plate 20 are coupled by a fixing bolt 50 so that the gap between the upper plate 20 and the lower plate 10 is maintained, and the lower plate 10 and the upper plate 20 are combined. Since the circumferential portion of the is open, it is easy to dissipate heat.

In the state where the lower panel 10 and the upper panel 20 are combined and cover the upper part of the switchboard, the external water is transferred between the lower panel 10 and the upper panel 20 through the through hole 21 of the upper panel 20. It can flow into space.

At this time, the first burring portion 12 is formed at a predetermined height h1 around the through hole 11 of the lower plate 10, and the water introduced from the outside is the height h1 of the first burring portion 12 ), so that it cannot be introduced into the through hole 11 of the lower plate 10.

That is, water is confined in a space consisting of the first burring portion 12 and the upper surface of the lower plate 10, and flows to the side and discharges to the outside.

As described above, the present invention forms the first burring part 12 having a high height around the through hole 11 formed for circulation of air in the lower panel 10, so that external water can be prevented from flowing into the switchboard. There will be.

In such a state, if the pressure increases due to an arc generated inside the switchboard, the PC screws 40 are damaged, and the lower panel 10 has a structure on the left side of the foldable part 13 of FIG. As it sounds, the increase in internal pressure can be eliminated.

The folded portion 13 may have a hinge structure or may be a groove crossing the lower plate 10.

In the drawing, the folded portion 13 is shown to have a groove shape, but the lower plate 10 has a structure in which the left and right sides are separated from each other based on the folded portion 13, and may be connected to each other by a hinge.

In order to perform such an action, the second burring portion 22 may be omitted substantially around the through hole 21 of the upper plate 20, and the first burring portion upward only around the through hole 11 of the lower plate 10 (12) may be formed.

In addition, even when the second burring portion 22 is formed for manufacturing reasons, the height h1 of the first burring portion 12 of the lower plate 10 is more than the height h2 of the second burring portion 22. You can do it high.

It can be understood that this is for improving the watertight characteristics using the first burring part 12.

The reason for forming the second burring part 22 may be to induce external water to flow in a direction directly under the through hole 21 of the upper plate 20.

4 is a partial cross-sectional view of an edge of an upper cover according to another embodiment of the present invention.

While describing with reference to FIG. 3, it has been described that the edge of the coupling structure between the upper plate 20 and the lower plate 10 is open, but while minimizing the inflow of water from the open edge, the through hole 21 of the upper plate 20 is In order to facilitate the discharge of the water introduced through, the blocking portion 14 and a drain hole 15 provided in the blocking portion 14 may be further included.

That is, the external water introduced through the through hole 21 of the upper plate 20 flows to the edge of the upper plate 20 and is easily discharged through the drain 15 of the blocking part 14 and the upper plate 20 When external water flows in diagonally from the edge of the bonded state of the lower plate 10 and the lower plate 10, the watertightness can be improved by using the blocking portion 14.

5 is an exploded perspective view of an upper cover of a switchboard according to another embodiment of the present invention, FIG. 6 is a perspective view in a combined state of FIG. 5, and FIG. 7 is a detailed perspective view of a pressure relief cover part in FIG. 5.

Referring to FIGS. 5 to 7 respectively, the present invention can be applied to a plurality of standardized pressure relief cover portion 200 to the cover plate 100.

The size of the upper surface of the case of the switchboard may be different for each switchboard, and the size and shape of the cover plate 100 covering the upper surface may also have various sizes and shapes.

In this case, one or two or more pressure relief ports 110 may be formed according to the size of the cover plate 100, and a standardized pressure relief cover part 200 may be fastened to the pressure relief port 110 to be used.

The cover plate 100 has a foldable portion 130, and in the same manner as in the above-described embodiments, a portion that is firmly fixed to the top of the case of the switchboard by bolts 300 and a PC screw 400 on the top of the switchboard case It is divided into a portion to be coupled, and when the internal pressure of the switchboard increases, the PC screw 400 is damaged and the cover plate 100 rotates with respect to the folded portion 130 and opens to relieve internal pressure.

That is, one side of the cover plate 100 based on the folding part 130 is a fixing part that is firmly fixed to the upper side of the case of the switchboard by a bolt 300, and the cover plate 100 excluding the fixing part The other part of) is fastened with a PC screw 400 that can be easily damaged according to an increase in internal pressure of the switchboard.

As described above, the folding part 130 may be a groove or a hinge structure using a hinge.

The size and shape of the pressure relief devices 110 formed on the cover plate 100 may be the same.

The cover plate 100 may be a metal or resin material.

The pressure relief cover part 200 is fastened to the upper side of the pressure relief port 110 of the cover plate 100 by a bolt 231.

The pressure relief cover part 200 includes a lower plate 210 and an upper plate 220 each having through holes 211 and 221 formed therein, and the lower plate 210 and the upper plate 220 are respectively injection-molded and combined, or The entire cover portion 200 may be injection-molded.

The lower plate 210 and the upper plate 220 are spaced apart from each other by a predetermined distance, and the distance is maintained by the space maintaining unit 230 therebetween. The bolt 231 may pass through the gap maintaining portion 230 and be coupled to the cover plate 100.

In such a structure, the through-holes 211 of the lower plate 210 and the through-holes 221 of the upper plate 220 are not positioned to communicate vertically, but are intersected.

In addition, a first burring portion 212 protruding upward is formed around the through hole 211 of the lower plate 210, and a second burring portion protruding downward around the through hole 221 of the upper plate 220 It is assumed that (222) is formed.

External water that can be introduced through the through hole 221 of the upper plate 220 flows into the upper surface of the lower plate 210 between the first burring parts 212 and flows toward the edge of the lower plate 210 to the outside. It is a structure that is discharged into. At this time, the second burring portion 222 formed around the through hole 221 of the upper plate 220 allows external water to flow in a direction directly under the through hole 221 so that external water through the first burring portion 212 This can be prevented from entering.

The height of the first burring portion 212 of the lower plate 210 is higher than the height of the second burring portion 222 of the upper plate 220, so that watertightness can be maintained even when there is a relatively large amount of water flowing from the outside. To be.

As described above, the present invention uses a simple structure in which an upper plate and a lower plate having a through hole and a burring portion protruding from the periphery of the through hole are mutually combined, so that air can be circulated and water can be prevented from entering.

Although the embodiments according to the present invention have been described above, these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent ranges of embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

10, 210: lower plate 11, 211: through hole
12, 212: first burring part 20, 220: top plate
21, 221: through hole 22, 222: second burring part
13, 130: folded portion 30, 300: bolt
40, 400: PC screw

Claims (9)

A top plate provided with a plurality of through holes penetrating up and down;
A lower plate spaced apart from the upper plate at a lower portion of the upper plate and having a plurality of through holes disposed to be staggered from the through holes of the upper plate; And
The upper cover of the switchboard including a first burring part protruding upward from the periphery of the through hole of the lower plate and preventing water introduced through the through hole of the upper plate from flowing into the through hole of the lower plate.
The method of claim 1,
The upper cover of the switchboard further comprising a second burring portion protruding downward from the periphery of the upper plate.
The method of claim 2,
The upper cover of the switchboard, characterized in that the height of the first burring portion is higher than the height of the second burring portion.
The method of claim 1,
A blocking part protruding upward at the edge of the lower plate to block the inflow of external water,
The upper cover of the switchboard further comprising a drain hole formed in the blocking portion to discharge external water flowing into the lower plate.
The method according to any one of claims 1 to 4,
The upper cover of the switchboard, characterized in that the lower plate includes a foldable portion, and when an internal pressure of the switchboard increases, a part of the lower plate coupled to the upper plate is opened by the internal pressure.
The method of claim 5,
One side of the lower plate based on the foldable part becomes a fixing part that is firmly fixed to the upper side of the switchboard by bolts,
The upper cover of the switchboard, characterized in that other parts of the lower plate other than the fixing part are fastened with PC screws which can be easily damaged according to an increase in internal pressure of the switchboard.
The method according to any one of claims 1 to 4,
Covering the upper portion of the switchboard, further comprising a cover plate formed with one or more pressure relief ports,
The upper cover of the switchboard is the lower plate coupled to the upper plate is coupled to the pressure relief port.
The method of claim 7,
The upper cover of the switchboard further comprising a gap maintaining portion between the upper plate and the lower plate.
The method of claim 7,
The upper cover of the switchboard, characterized in that the cover plate includes a folded portion and partially opens when an internal pressure of the switchboard is increased.

Images