KR101127404B1 - Circuit breaker cradle having movable shutter - Google Patents

Abstract

In order to achieve the above object, the present invention provides a cradle vertical portion having a terminal connected to a bus terminal and a load terminal of a circuit breaker main body, and having a movable barrier and a fixed barrier on one side thereof; A base frame for guiding movement of the cart portion accommodating the circuit breaker main body; And a main link provided at both sides of the base frame, the main link rotating while being in contact with the moving wheel of the cart portion, wherein the movable barrier is connected to one end of the main link and moves up and down the cradle device of the circuit breaker. In this case, a separate part is unnecessary to rotate the main link because the wheel of the bogie part rotates by pressing the main link while rolling over the base frame.

Circuit Breaker, Cradle, Main Link, Wheel, Base Frame

Description

Cradle device of circuit breaker with movable barrier {CIRCUIT BREAKER CRADLE HAVING MOVABLE SHUTTER}

The present invention relates to a cradle device of a circuit breaker, and more particularly, to a method and a structure in which a movable barrier is opened in a cradle device for accommodating the circuit breaker when the circuit breaker is drawn in or out of the cradle device.

In general, circuit breakers are used in switchboards in which various electric devices including breakers are put in place for operation or control of power plants, substations, and motors, and the like. do. The draw-out circuit breaker is configured such that the breaker main body including various control circuits and accessories from the fixed cradle can be pulled in or out in the front-rear direction. Hereinafter, the lead-out circuit breaker of the circuit breaker will be described.

The circuit breaker is housed and used in the cradle fixed to the switchboard, and the position of the circuit breaker on the cradle is the operation position where the bus and load terminals of the circuit breaker are connected to the bus and load terminals of the cradle to supply voltage and current. It is separated from the terminals of the and cradles and consists of a test position that only tests the operation of the circuit breaker. In addition, the front of the cradle is shielded from the outside by a barrier to protect the circuit inside the cradle, and serves to prevent a safety accident that may occur when the operator contacts the circuit portion of the cradle in the state that the breaker is pulled out.

In the conventional circuit breaker, a lot of parts are required to operate the movable barrier of the cradle, and thus, the manufacturing process is complicated or the device of the cradle is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a means for effectively moving a movable barrier of a cradle used in a circuit breaker, and to provide a circuit breaker having a high stability and a simple moving means of the movable barrier.

In order to achieve the above object, the present invention provides a cradle vertical portion having a terminal connected to a bus terminal and a load terminal of a circuit breaker main body, and having a movable barrier and a fixed barrier on one side thereof; A base frame for guiding movement of the cart portion accommodating the circuit breaker main body; And a main link provided at both sides of the base frame, the main link rotating while being in contact with the moving wheel of the cart portion, wherein the movable barrier is connected to one end of the main link and moves up and down the cradle device of the circuit breaker. to provide.

This configuration eliminates the need for a separate component to rotate the main link because the wheel of the cart is rotated by pressing the main link while rolling on the base frame.

The main link may further include a cradle device of a circuit breaker having a rotation center hole connected to the base frame and a movable barrier connection hole connected to the movable barrier, and rotatable based on the rotation center hole. To this end, the main link is inclined to an imaginary line connecting the rotation center hole and the movable barrier connection hole, and has an inclined surface pressed by the wheel of the bogie.

In addition, both sides of the base frame is provided with a side portion extending perpendicular to the base frame body, the rotation center hole of the main link provides a cradle device of the circuit breaker connected to the protrusion provided protruding from the side portion.

In addition, the base frame body is provided with a cradle device of the circuit breaker is formed spaced apart by a predetermined distance along the side portion is provided with a wheel guide plate for guiding the wheel of the cart.

In addition, an upper portion of the side portion of the base frame is provided with an extension extending perpendicular to the side portion, the extension provides a cradle device of the circuit breaker formed with a link guide groove for receiving and guiding the main link.

As the main link is pressed by the wheel and rotates, the movable barrier connected to the main link provides a cradle device of a circuit breaker that moves upward.

In addition, the base frame of the cradle device of the present invention is provided with an interlock plate having a test positioning groove and an operation positioning groove to limit the movement of the circuit breaker main body when the circuit breaker is in the test state and the operating state.

According to the above configuration, the circuit breaker cradle device of the present invention simplifies the manufacture and operation of the movable barrier of the cradle and can effectively move the movable barrier of the cradle, thereby providing a circuit breaker cradle device with high stability and reliability.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 is a perspective view of a circuit breaker main body according to an embodiment of the present invention, FIG. 2 is a perspective view of a bogie part of the circuit breaker of FIG. 1, FIG. 3 is a perspective view of a cradle according to an embodiment of the present invention, and FIG. 4. 1 is a perspective view illustrating a circuit breaker of FIG. 1 being drawn into the cradle of FIG. 3, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a view of the circuit breaker of FIG. 1 fully connected to the cradle of FIG. 3. 7 is a perspective view of the cradle base frame of FIG. 3, FIG. 8 is a side view of the movable barrier main link of FIG. 7, and FIG. 9 is a perspective view of the movable barrier according to an embodiment of the present invention.

1 and 2, the circuit breaker includes a circuit breaker main body 10 and a bogie 20 for driving and moving the main body. The circuit breaker main body 10 is provided with a bus terminal 14 and a load terminal 15 for supplying current by contacting the bus side and the load side of the cradle, respectively, and the bus terminal 14 and the load terminal 15 are provided. A circuit unit (not shown) to be electrically connected to or disconnected from each other and a driving unit for providing power to mechanically open or close the circuit unit are provided therein. An interlock link 11 is provided to prevent relative movement of the circuit breaker main body in the cradle (described below) at the operation position and the test position. In addition, the cart 20 is provided to move the circuit breaker main body 10. The trolley 20 includes a plate 21 on which the circuit breaker main body 10 is placed, a side portion 22 of the plate, and a plurality of wheels 23 provided on the side portion 22. The circuit breaker main body 10 is placed on the trolley 20 and used in the cradle.

3 illustrates cradles 30 and 40 according to an embodiment of the present invention, which includes a cradle vertical portion 30 and a base frame 40 which are configured to be perpendicular to each other. Inside the cradle vertical portion 30, a bus terminal (36 in FIG. 5) and a load terminal (37 in FIG. 5) to which the bus terminal 14 and the load terminal 15 of the circuit breaker main body 10 are connected, respectively. Is provided. In addition, a fixed barrier 31 and a movable barrier 33 are mounted on a surface facing the circuit breaker in the cradle vertical portion 30, and the fixed barrier is mounted and fixed, but the movable barrier is mounted on the cradle vertical portion. It is movable up and down. And the cradle vertical portion is provided with a movable barrier guide hole 35 for guiding this when the movable barrier 33 moves in the vertical direction.

The body 41 of the base frame 40 includes an interlock plate 43 for fixing the circuit breaker 10, and the interlock plate has a test positioning groove 44 for determining a test position of the circuit breaker. ) And an operation positioning groove 45 for determining an operation position of the circuit breaker. That is, when one end of the interlock link 11 of the circuit breaker 10 is inserted into the test positioning groove 44, the circuit breaker is in the test position, and one end of the interlock link 11 is operated. In the state of being inserted into the positioning groove 45, the circuit breaker is in the operating position.

4 is a state in which the circuit breaker 10 is mounted on the trolley 20 and moved to the cradle vertical portion 30 on the base frame 40, and FIGS. 5 and 6 are mounted on the circuit breaker. Side view. 5 is a circuit breaker in a state in which the bus terminal 14 and the load terminal 15 of the circuit breaker main body 10 are not connected to the bus terminal 36 and the load terminal 37 of the cradle vertical part 30. 6 is located at the test position, and FIG. 6 shows that the bus terminal 14 and the load terminal 15 of the circuit breaker main body 10 are connected to the bus terminal 36 and the load terminal 37 of the cradle vertical part 30, respectively. It is located in the operating state of the connected state. The circuit breaker is moved to the test position and the operation position while moving on the base frame 40, where one end of the interlock link 11 of the circuit breaker 10 is inserted into the test positioning groove 44. At the driving position, one end of the interlock link 11 is inserted into the driving positioning groove 45.

7 illustrates a cradle base frame 40 according to an embodiment of the present invention, wherein the body 41 of the base frame 40 has a test positioning groove for fixing the circuit breaker 10. An interlock plate 43 having a 44 and an operation positioning groove 45 is provided, and frame side portions 42 are formed on both sides of the base frame 40 perpendicular to the body 41. A link connecting protrusion 46 for fixing one side of the main link 50 protrudes from the frame side portion 42, and a pin hole (not shown) for mounting the main link is formed in the link connecting protrusion 46. The main hole connecting pin 48 is mounted in the pin hole. An extension portion 42a extending perpendicular to the frame side portion 42 and parallel to the body 41 of the base frame is extended to an upper end of the plane side portion 42, and a main link (A) to the extension portion 42a. The main link guide groove 42b is formed to receive a portion of the guide 50. In addition, the wheel guide plate 49 is formed along the frame side part 42 by being spaced apart from the frame side part 42 by a predetermined distance, and is spaced apart from the space between the frame side part 42 and the wheel guide plate 49. The wheel 23 of the cart 20 is accommodated and becomes a passage for moving.

8, the side shape of the main link 50 according to an embodiment of the present invention is shown. One end of the main link 50 is formed with a rotation center hole 51, which is a center of rotation of the main link, and a pin hole formed in the rotation center hole and the link connection protrusion 46 in the main link connecting pin ( The main link 50 is mounted to the base frame 40 so that the main link 50 can be rotated based on the rotation center hole 51. Then, at the other end of the rotary center hole 51, a movable barrier connecting hole 53 connected to the movable barrier 33 is formed at the other end, and the rotary center hole 51 and the movable barrier connecting hole 53 are formed. The inclined surface 52 is inclined in the imaginary line which connects. The inclined surface 52 is in contact with the outer circumferential surface of the wheel 23 of the cart 20 moving on the base frame 40. If the wheel 23 of the trolley 20 proceeds in the direction indicated by the arrow in FIG. 8, the outer circumferential surface of the wheel 23 pushes the inclined surface 52 of the main link 50. However, since the main link 50 is rotatably mounted in a fixed position of the rotation center hole 51, the main link rotates counterclockwise around the rotation center hole. Then, the movable barrier connecting hole 53 formed at the other end of the main link also rotates in the counterclockwise direction with respect to the rotation center hole 51.

9 shows a state of the movable barrier 33 provided in the vertical portion 30 of the cradle according to the present invention. The movable barrier 33 is spaced apart from each other in the vertical direction and is provided with a plurality of guide plates 33a formed in a rectangular plate shape and side members 33b attached to both sides of the guide plate to fix the guide plates. In addition, the lower end of the side member is provided with a main link connecting hole (33c) connected to the main link (50). The main link connecting hole 33c is connected to the movable barrier connecting hole 53 of the main link 50 by a means such as a pin. As described above, if the wheel 23 of the trolley 20 proceeds in the direction of the arrow of FIG. 8, the movable barrier connecting hole 53 formed at the other end of the main link is half of the rotation center hole 51. It rotates in a clockwise direction, and as a result, the movable barrier 33 connected to the movable barrier connecting hole 53 also rotates in the same direction. The movable barrier is constrained to move only in the up and down direction, so that the movable barrier is upward. It will move.

Next, the operator is connected to the busbar and load terminals (04,05) of the circuit breaker and the load terminals (14,15) of the cradle as shown in Fig. 7 so that the voltage and current are supplied to the run position. First, when the operator lifts the interlock link to the upper side to remove it from the test positioning groove and pushes the breaker main body toward the cradle terminal again, the breaker is moved so that the interlock link 02 enters the run positioning groove 13 of the cradle. Is in the operating position in the cradle. When the circuit breaker is moved from the test position to the run position, the movable barrier link along the first and second guide surfaces 41 and 42 of the link contact guide 40 of the circuit breaker bogie 08 is obtained. The guide contact pin 31 of 30 is moved. Therefore, as the circuit breaker approaches the run position, the movable barrier main link 33 rotates about the main link center pin 34 so that the movable barrier contact pin 32 moves upward. The pin lifts the bracket 22 of the movable barrier 20 to open the movable barrier, which moves upward along the movable barrier guide hole 21 by the fixed barrier 16.

The position of the circuit breaker in the cradle has an operation position and a test position. In the operation position, the main body 10 of the circuit breaker is accommodated in the cradle 20 while the circuit breaker is mounted on the cradle, and the bus terminal of the circuit breaker main body ( 14) and the load terminal 15 are connected to the bus terminal (26 in FIG. 4) and the load terminal (27 in FIG. 4) of the cradle 20 to supply voltage and current, and only the circuit breaker can be tested at the test position. Position and the terminals of the circuit breaker body and the terminals of the cradle are separated from each other.

 The circuit breaker's bus and load terminals are connected to the cradle's bus and load terminals, and the terminals of the cradle and the run are supplied with voltage and current. It has a test position that can be separated from the breaker and can only test the operation of the breaker. In case of F / G class cradle, when the circuit breaker is in the test position, the bus terminal and load terminal of the circuit breaker and the bus terminal and load terminal of the cradle are isolated by the movable barrier. The movable barrier is opened so that the bus / load terminals can contact the bus / load terminals of the cradle.

In the present invention, the main body 60 of the circuit breaker is accommodated in the cradle 50 so that the bus bar and the load terminals 65 and 66 of the main body are separated from the operation positions connected to the bus bar and the load terminals 55 and 56 of the cradle. In moving between test positions where only the test can be carried out, the wheel of the frame 63 of the main body 60 lifts the movable barrier main link 80 provided in the cradle, thereby enabling the movable barrier 90 provided in the cradle. Will be lifted.

First, in order for the worker to move the circuit breaker main body 60 of FIG. 9 to the test position in the cradle 50 of FIG. 8, the operator first lifts the interlock link 61 provided in the main body to the upper part and simultaneously pushes the breaker. The interlock link is seated in the test positioning groove 52 of the interlock plate 51 provided in the cradle. This position is the position where the busbar and load terminals 64 and 65 of the breaker are separated from the busbar and load terminals 14 and 15 of the cradle so that only the operation test of the circuit breaker is possible. In this position, the movable barrier 90 of the cradle separates the bus bar and the load terminals 64 and 65 of the main body and the bus bar and the load terminals 56 and 57 of the cradle into space.

The operator must first connect the circuit breaker bus and load terminals 64 and 65 to the cradle bus and load terminals 56 and 57 so that the voltage and current are supplied to the breaker. Lifting the interlock link upwards to remove it from the test positioning groove and again pushing the breaker body toward the cradle terminal moves the breaker so that the interlock link 61 enters the run positioning groove 54 of the cradle and the breaker at the cradle. You are in the operating position.

The wheel of the circuit breaker frame 63 moves along the frame wheel guide surface 82 of the movable barrier main link 80 while lifting the main link while moving the main body in order to put the main body in the run position. At this time, the wheel of the main frame is restrained by the frame guide plate 73 to be in the area for lifting the link and the movable barrier main link 80 is the main link guide hole 72 around the link rotation center hole 81. As it rotates along, the lifting barrier 90 connected to the main link is lifted to open the barrier.

In other words, the wheel itself lifts the movable barrier without any other accessories in the circuit breaker body.

It consists of a frame guide plate 73 for restraining the wheel of the frame provided in the cradle, a movable barrier main link 80 for pushing up the wheel of the frame, and a link guide hole 72 for guiding the movement of the link. This lifting of the link with the wheels provides a simple, highly reliable movable barrier open / close action mechanism without other incidental parts in the breaker body.

1 is a perspective view of a circuit breaker according to an embodiment of the present invention;

FIG. 2 is a perspective view of a bogie part of the circuit breaker of FIG. 1;

3 is a perspective view of a cradle according to an embodiment of the present invention,

4 is a perspective view illustrating a circuit breaker of FIG. 1 inserted into a cradle of FIG. 2;

5 is a side view of FIG. 4 viewed from the side;

FIG. 6 is a perspective view illustrating the circuit breaker of FIG. 1 fully connected to the cradle of FIG.

7 is a perspective view of the base frame of the cradle of Figure 3,

8 is a side view of the movable barrier main link of FIG. 7,

9 is a perspective view of a movable barrier according to an embodiment of the present invention.

-Description of the main parts of the drawing-

10: circuit breaker main body 11: interlock link

12: In / Out Handle Bracket 14: Mother Bus Terminal

15: Load terminal 20: Balance

21: plate 22: side portion

23: wheel 30: cradle vertical

31: fixed barrier 33: movable barrier

35: movable barrier guide hole 36: bus terminal

37: Load terminal 33a: Guide plate

33b: side member 33c: main link connection hole

40: base frame 41: body

42: frame side part 42a: extension part

42b: main link guide groove 43: interlock plate

44: test positioning groove 45: operation positioning groove

46: main link connecting projection 48: main link connecting pin

49: wheel guide plate 50: main link

51: rotation center hole 52: inclined surface

Claims (8)

A cradle vertical portion having terminals connected to the bus terminal and the load terminal of the circuit breaker main body, and having a movable barrier and a fixed barrier on one side thereof; A base frame for guiding movement of the cart portion accommodating the circuit breaker main body; It is provided on both sides of the base frame, the main link to rotate while contacting the moving wheel of the balance portion; The main link, the rotation center hole connected to the base frame, the movable barrier connecting hole connected to the movable barrier, and the virtual line connecting the rotary center hole and the movable barrier connecting hole to the upper side by the wheel of the balance unit It is provided with a downward inclined surface that is pressed by, to rotate the reference to the center of rotation hole by the pressing of the wheel, The base frame has a side portion extending vertically on both sides, an extension portion extending inwardly perpendicular to the side portion on an upper side of the side portion, and formed on the extension portion to receive an inclined surface of the main link to be pressed by the wheels. It is provided with a link guide groove for guiding The movable barrier is connected to one end of the main link so that the inclined surface is pressed by the wheels to move upwards as the main link rotates, or move downwards by its own weight so that the terminal and the cradle of the circuit breaker main body are moved. A cradle device for a circuit breaker, which opens and closes between terminals. delete delete The method of claim 1, The center hole of the rotation of the main link cradle device of the circuit breaker, characterized in that connected to the protrusion provided protruding from the side portion. The method of claim 1, The base frame cradle device of the circuit breaker, characterized in that the wheel guide plate is formed spaced apart by a predetermined distance along the side portion to guide the wheel of the bogie. delete delete The method of claim 1, The base frame is provided with an interlock plate having a test positioning groove and an operation positioning groove, thereby limiting the movement of the circuit breaker main body in the test state and the operation state cradle device of the circuit breaker.

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