KR101608928B1 - Safety shutter barrier of motor control center - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides a safety shutter barrier for a motor control center which can prevent a safety accident such as short-circuit, short-circuit, and electric shock due to no exposure of the main busbar.
In order to achieve the above object, according to the present invention, there is provided a cabinet including a cabinet in which a main bus bar is installed at the rear, an MCC unit installed in a drawer to be inserted and withdrawn into the cabinet, And a connector mounted on a rear side of the MCC unit and electrically connected to the main busbar and the MCC unit, the shutter barrier being fixed to the cabinet and having a connector hole communicating with the main busbar, A shutter having a connection arm formed at one side thereof for opening and closing the connection hole in accordance with the rotation around the hinge, a first end coupled to the wall surface of the cabinet by a pin, A lever rotatably mounted on the side of the MCC unit, Is possibly equipped discloses a barrier comprising a roller shutter operating lever during insertion and withdrawal of the MCC unit to rotate in forward and reverse directions around its pin.

Description

The shutter barrier of the motor control center

The present invention relates to a shutter barrier of a motor control center. More particularly, the present invention relates to a shutter barrier of a motor control center, and more particularly, To a safety shutter barrier of a motor control center capable of preventing a safety accident.

The Motor Control Center (MCC) is provided in various industrial facilities such as factories, buildings, hospitals and apartment houses to safeguard the motor and related load devices. It distributes low-voltage electricity supplied from the transformer to electric motors, etc. And monitoring and blocking the flow of overcurrent.

As an example of such a motor control center, Korean Patent Registration No. 10-0776713 discloses a motor control device for controlling various motors such as a voltage drop and a current transformer, a switch, a relay, an automatic circuit breaker, a fuse, a timer and an electronic over current relay A plurality of MCC units are respectively housed in a drawer type in a multi-layered cabinet for easy maintenance and replacement of the parts. When the MCC unit is pulled forward, the primary and secondary connectors for power supply are simultaneously connected to the main booth And the bar is drawn out to the front of the cabinet while being electrically separated.

However, since such a conventional motor control center is exposed to a high-current main busbar, the risk of a safety accident due to a short circuit, a short circuit, an electric shock, or a spark is very high during maintenance, There is a problem that the work efficiency is lowered due to the psychological uneasiness of the worker.

Accordingly, the inventor of the present invention has developed a shutter barrier that can prevent exposure to power from the main busbar, thereby preventing various safety accidents and relieving psychological anxiety during work by the operator (Korean Utility Model Publication No. 20- 0354939).

However, this is because the guide blocks formed on both sides of the front surface of the shutter plate are guided by the guide ribs formed at both ends of the shutter plate vertically on both sides of the base frame, The shutter plate is tilted to one side and the end of the guide plate and the guide are firmly in close contact with the guide rib, This causes a problem that the shutter plate can not be smoothly moved up and down.

Further, since the shutter plate has a freely liftable structure, the operator can lift the shutter plate during the operation and the safety is insufficient.

1 shows a shutter barrier disclosed in Korean Patent Registration No. 10-1269701 as another example of a shutter barrier for a motor control center. In Fig. 1, an electric connection portion of an MCC unit U A shutter frame 12 having an opening 14 to be inserted therein and an upper and a lower shutter plate 12 rotatably coupled to the shutter frame 12 to divide and cover the opening 14 of the shutter frame 12 16) (18).

This is because the upper and lower shutter plates 16 and 18 are rotated toward the main bus bar to open and close the opening 14 of the shutter frame 12, There is a design limitation in miniaturizing the motor control center since it is necessary to secure a clearance of the rotation radius so as not to contact the main bus bar.

In addition, since the upper and lower shutter plates 16 and 18 are rotatable arbitrarily, the operator's fingers are nipped between the upper and lower shutter plates 16 and 18 during operations such as maintenance, parts replacement, and cleaning There is a risk that the safety is considerably deteriorated by causing a risk of a safety accident in which an electric shock is generated.

Korean Patent Registration No. 10-0961777 (Jun. 7, 2010) Korean Registered Patent No. 10-1269701 (May 30, 2013) Korean Registered Utility Model No. 20-0354939 (July 1, 2004) Japanese Unexamined Patent Application Publication No. 06-022418 (Jan. 28, 1994)

Accordingly, the present inventor has focused on solving the above-mentioned problems and solving the problems, thereby preventing a safety accident such as an electric shock by the main bus bar more effectively, thereby relieving psychological anxiety during work, As a result, the inventors of the present invention have invented a shutter barrier which can be miniaturized in the cabinet.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a shutter barrier of a motor control center, which can reliably prevent exposure of the main busbar, thereby improving safety and opening and closing operations smoothly and stably.

Another technical solution and object of the present invention is to provide a shutter barrier of a motor control center which can minimize the space required for installation.

According to an aspect of the present invention, there is provided a cabinet comprising: a cabinet in which a main bus bar is installed at a rear side; And a connector for electrically connecting the main bus and the MCC unit mounted on the rear side of the MCC unit and outputting the converted power to the secondary side and the tertiary side power supply, And a connecting hole is formed on the inner side so that the connector can be connected to the main bus bar. The connecting hole is connected to the body by a hinged joint, and the connecting hole is opened and closed in accordance with the rotation about the hinge, And one end of the shutter is coupled to the wall surface of the cabinet by a pin joint so as to be rotated And a lever rotatably mounted on the side of the MCC unit so as to rotate the lever in forward and reverse directions when the MCC unit is inserted and withdrawn so that the shutter operates to open and close the connection hole And a shutter barrier.

Accordingly, the shutter can be opened and closed smoothly and stably, and the exposure of the main busbar can be safely blocked. Therefore, it is possible to prevent a safety accident such as a short circuit, a short circuit and an electric shock during operation, Can open and close the connection hole while interlocking with the installation space of the MCC unit. This minimizes the space required for operation and installation, thereby reducing the volume of the cabinet and preventing the risk of safety accidents .

According to a preferred embodiment of the present invention, a guide slot is formed at an end portion connected to the connection arm of the lever, and the connection arm is slidably coupled along the guide slot, so that the lever and the shutter are interlocked smoothly and smoothly, Can be stably opened and closed.

In another preferred embodiment of the present invention, a lock ring for restricting the operation of the lever to the lower portion of the lever and the wall surface of the cabinet may be respectively formed to prevent the shutter from rotating about the hinge.

Thus, the present invention can more safely block the exposure of the main busbar, thereby relieving the operator's psychological anxiety due to risk factors such as short circuit, short-circuit, and electric shock during operation, thereby improving work efficiency.

SUMMARY OF THE INVENTION The present invention having the solution and the constitution of the technical object as described above is characterized in that the opening and closing operation of the shutter is smoothly and stably performed by the link connection structure and the main bus bar is not exposed at random, It is possible to maximize safety and reliability to prevent safety accidents such as short circuit, short circuit and electric shock during operation.

Further, unlike the conventional case, unlike the conventional case, since the shutter rotates in conjunction with the insertion space of the MCC unit by inserting and withdrawing the MCC unit, the space for opening and closing the shutter is unnecessary, thereby minimizing the volume and size of the cabinet In addition, since the shutter is not rotated even if the operator inadvertently touches the shutter with the finger during the operation, the risk of the safety accident in which the finger is stuck and the electric shock is prevented can be prevented.

1 is a side sectional view showing a shutter barrier according to a conventional technique.
2 is a perspective view schematically showing a motor control center to which a shutter barrier according to an embodiment of the present invention is applied.
3 is an enlarged view of a portion "A" in Fig.
4 is a perspective view showing a local portion of a motor control center to which a shutter barrier according to an embodiment of the present invention is applied.
5 is an enlarged view of a portion "B" in FIG.
6 is a perspective view showing a local portion of a motor control center to which a shutter barrier according to an embodiment of the present invention is applied.
7 is an exploded perspective view showing a local portion of a shutter barrier according to an embodiment of the present invention.
8 and 9 are local side views showing an operating state of the shutter barrier according to the embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described more specifically with reference to the accompanying drawings.

Prior to this, the following terms are defined in consideration of the functions of the present invention, and they are to be construed to mean concepts that are consistent with the technical idea of the present invention and interpretations that are commonly or commonly understood in the technical field.

In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

Herein, the attached drawings are exaggerated or simplified in order to facilitate understanding and clarification of the structure and operation of the technology, and it is to be noted that each component does not exactly coincide with the actual size.

In the following description, the direction in which the MCC unit is pulled out from the cabinet is defined forward, and the direction opposite to the forward direction, that is, the direction in which the MCC unit is inserted into the cabinet is defined as the rearward direction.

2 to 7, the shutter barrier according to the embodiment of the present invention mainly includes a body 100, a shutter 200, a lever 300, and a roller 400.

The shutter barrier according to the embodiment of the present invention includes a cabinet F in which a main bus bar B is installed at the rear and a cabinet F which is fitted in a drawer- A main bus bar B and an MCC unit U which are mounted on the rear side of the MCC unit U and electrically connected to the main bus bar B and the MCC unit U, And a connector (C) for connection.

Here, the cabinet F is formed of a housing in which a plurality of frames and plates are assembled in a box shape, and a main bus bar B for each of R, S, T, and N phases supplied with power from the outside is installed at the rear And a storage space for mounting a plurality of MCC units U in a drawer is formed in a multi-layered structure at the front.

The MCC unit U is formed in a box shape having a bottom plate and side plates on all sides and is installed in a drawer in the cabinet F to receive and convert the primary power through the main bus bar B, And is provided so as to perform normal functions such as outputting power and transmitting signals to the tertiary side.

That is, on the front of the MCC unit U, there are provided a switch for turning on / off the electric power of the motor, a lever for opening / closing the lock device or for interrupting the breaker, and a handle for facilitating the operation of inserting / Inside, there are electromagnetic switches for preventing opening and closing of motor circuit and overload, magnet for switching, a circuit breaker for automatically shutting off the circuit when an error occurs in the motor circuit, and a measuring instrument for measuring the current and voltage of the power supply. A motor control circuit part is provided and a side surface of the cabinet F is provided with a guide rail for allowing quick and smooth operation to be inserted into or removed from the cabinet space.

The connector C is electrically connected to the main bus bar B and the MCC unit U of each phase and is connected to the main bus bar B via the main bus bar B, And are provided at the rear surface of the MCC unit U facing the bar B in the same number as each phase of the main bus bar B.

The body 100 is fixed between the main bus bar B of the cabinet F and the MCC unit U and is provided with a connection hole (not shown) through which the connector C is connected to the main bus bar B 110 are formed.

A plurality of hinge holders 120 for connecting the shutter 200 with the hinge joint are formed at regular intervals in the upper rim of the connection hole 110. A main bus bar B The bus bar insertion portion 130 is integrally formed so that a part of the bus bar insertion portion 130 is inserted.

It is needless to say that the size, number and spacing of the connection holes 110 can be formed to meet the specifications of the main bus bar B and the connector C. [

The shutter 200 is hinged to the front of the body 100 and opens and closes the connection hole 110 according to the rotation around the hinge so that the connection arm 210 is connected to the wall side of the cabinet F, Are integrally formed.

That is, the shutter 200 is formed as a plate-shaped body having a length and width enough to close the connection hole 110 of the body, and a hinge pin 120 for connecting the hinge holder 120 of the body with the hinge pin 220 are formed at regular intervals.

Here, the body 100 and the shutter 200 are preferably formed of an insulating material such as a synthetic resin to prevent the main bus bar B from directly contacting the MCC unit U, B) and the MCC unit U is prevented from coming into contact with the main bus bar (B) with high current during maintenance or replacement work, thereby securing the safety of the work, thereby relieving the psychological anxiety of the worker It is of course possible to mount an insulating wall (not shown) for improving the working efficiency.

The lever 300 is operated to open and close the connection hole 110 of the body by rotating the shutter 200 about the hinge and one end of the lever 300 is coupled to the wall surface of the cabinet F by a pin- And the other end is rotatably coupled to the connection arm 210 freely.

That is, a pin hole 310 for inserting the pin 330 is formed at one end of the lever 300, and a contact portion of the connecting arm 210 is naturally slidably moved A guide slot 320 for guiding the shutter 200 to rotate is formed.

The lever 300 rotates the shutter 200 by its own weight so that the end of the lever 300 where the pin hole 310 is formed is inserted into the guide slot 320 so as to maintain the closed state of the connection hole 110 of the body And is disposed in a state of being inclined obliquely forward and backward so as to be positioned slightly higher than the formed end portion.

The roller 400 is guided so as to smoothly come into rolling contact with the lever 300 during the insertion operation of the MCC unit U and is guided to the bottom surface between the pin hole 310 of the lever 300 and the guide slot 320, Is guided to rotate smoothly and smoothly around the pin 330. The roller guide surface 340 is inclined.

By restricting the operation of the lever 300, the shutter 200 can be prevented from rotating freely about the hinge. To this end, the lock ring 500 is fixed to the wall surface of the cabinet F, And a lock ring 350 is formed at a lower portion of the corresponding lever 300.

That is, since the locking means such as a lock or a cable tie can be easily fixed and fixed to the locking ring 350 fixed to the lever locking ring 350 and the locking ring 500 fixed to the wall surface of the cabinet F, It is possible to prevent a safety accident such as a short circuit, a short circuit, and an electric shock from occurring.

The roller 400 operates to rotate the lever 300 in forward and reverse directions about the pin 330 when the MCC unit U is inserted and withdrawn, Respectively.

That is, the roller 400 is in rolling contact with the lever 300 during the insertion operation of the MCC unit U, thereby rotating the lever 300 upward about the pin 330, When the MCC unit U is pulled upward, the lever 300 is rotated to rotate about the hinge to open the connection hole 110. On the other hand, when the MCC unit U is pulled out, The lever is rotated downward about the pin 330, and as a result, the connection arm 210 of the shutter is downwardly moved downward to be rotated about the hinge, thereby closing the connection hole 110. [

The operation state of the shutter barrier according to the embodiment of the present invention will now be described with reference to FIGS. 8 and 9. FIG.

8, when the MCC unit U is inserted into the cabinet F, the roller 400 mounted on the side surface of the MCC unit U presses the roller guide surface 340 of the lever 300 The connecting arm 210 of the shutter connected to the portion of the guide slot 320 of the lever rotates the shutter 300 at a predetermined angle in the upward direction about the pin 330, The connector C is smoothly passed through the connection hole 110 to be connected to the main bus bar B (B) by rotating the main body 200 in the counterclockwise direction about the hinge, thereby opening the connection hole 110 of the body. As shown in Fig.

9, when the MCC unit U is unloaded from the cabinet F, the roller 400 is moved to the front of the cabinet F together with the MCC unit U, and the lever 300 So that the end of the lever where the pin hole 310 is formed is positioned slightly higher than the end of the guide slot 320. The lever is installed in a state of being inclined obliquely to the front and rear of the cabinet F 300 rotates the shutter 200 clockwise about its hinge by its own weight so that the connection hole 110 of the body is kept closed by the shutter 200. [

The opening and closing operation of the shutter 200 is smoothly and stably performed by the lever 300 interlocked with the insertion and withdrawal of the MCC unit U. In this process, It is completely sealed so that it will not be exposed, so it can be safely cut off, so it can prevent safety accidents such as short circuit, short circuit and electric shock during operation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments or constructions. Various changes and substitutions may be made without departing from the spirit and scope of the invention. It will be obvious to those skilled in the art that the present invention can be widely applied to other embodiments.

Therefore, it is to be understood that modifications and variations of the features of the present invention are intended to be included within the spirit and scope of the present invention.

100: Body 110: Connection hole
120: hinge holder 200: shutter
210: connecting arm 220: hinge pin
300: Lever 310: Pin hole
320: guide slot 340: roller guide surface
350: lock ring 400: roller
500: Lock ring
B: Main booth bar F: Cabinet
U: MCC unit C: Connector

Claims (3)

A cabinet (F) having a main bus bar (B) built in the rear thereof;
An MCC unit U installed in the cabinet F to be inserted and withdrawn in a drawer manner, receiving and converting the primary power from the main bus bar B, and outputting the secondary power to the secondary power and the tertiary power; And
A connector C mounted at the rear of the MCC unit U to electrically connect the main bus bar B and the MCC unit U;
The shutter barrier comprising:
A connection hole 110 is formed in the cabinet F so as to be fixed between the main bus bar B and the MCC unit U so that the connector C can be connected to the main bus bar B A body 100;
A shutter 200 mounted on the body 100 in a hinged manner and opening / closing the connection hole 110 in accordance with rotation about the hinge, the connection arm 210 being formed on one side;
A lever 300 having one end coupled to a wall surface of the cabinet F by a pin coupling and rotated about the pin 330 and the other end rotatably coupled to the coupling arm 210; And
A roller 400 rotatably mounted on a side of the MCC unit U and operated to rotate the lever 300 in forward and reverse directions about the pin 330 when the lever 300 is inserted and withdrawn;
/ RTI >
A guide slot 320 is formed at an end portion of the lever 300 connected to the connection arm 210 and the connection arm 210 is slidably coupled along the guide slot 320 Shutter barrier.
delete The method according to claim 1,
A lock ring 350 for restricting the operation of the lever 300 is provided at a lower portion of the other end of the lever 300 and a wall surface of the cabinet F to prevent the shutter 200 from rotating about the hinge, (500).

Images