JPH09130929A - Circuit breaker moving unit for cubicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit breaker moving unit for cubicle in which a circuit breaker body can be moved by means of a motor through unattended remote control, while avoiding impact at the time of connection, by providing a simple additional structure utilizing the dead space of an existing cubicle without requiring significant modification. SOLUTION: A motor moving unit 4 comprising a motor 5, a decelerator 6 for the motor 5 and a jack 7 telescoping along the moving direction of a circuit breaker body 1 is installed on the floor surface 2a of a cubicle 2 on the side opposite to the side where a main circuit 3 is present with respect to the circuit breaker body 1. The jack 7 of motor moving unit 4 is coupled, at the forward end part, with an engaging piece 1b fixed to the circuit breaker body 1 thus constituting a motor type cubicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker moving device for a closed switchboard installed in a substation or the like, and more specifically, it connects a circuit breaker body housed in a closed switch box to a main circuit. The present invention relates to a device for moving between a connected position and a disconnection position separated from a main circuit.

[0002]

2. Description of the Related Art A conventional closed switchboard of this type is constructed so that a circuit breaker body housed in a closed switch box is manually moved through a handle attached to the circuit breaker body. In addition to this, in general, a dedicated drive mechanism including an electric motor is built into the main body of the circuit breaker, and the electric motor is configured to drive and move the main body of the circuit breaker by controlling the operation of the electric motor. Are also known.

[0003]

However, in the case of the conventional general closed switchboard in which the circuit breaker body is manually moved between the connection position and the disconnection position through the handle as described above, it is installed in a substation or the like. Not only is it troublesome for each person to move into the closed distribution box, but also there is a large variation (individual difference) in the moving speed when connecting the breaker body to the main circuit. , At the time of connection, an unexpectedly large impact is applied to the main body of the circuit breaker or the contact area on the main circuit side, and damage is likely to occur.

On the other hand, the electric closed switchboard has the advantage that the moving speed of the electric closed switchboard can be set to a low constant speed to avoid the impact at the time of connection and the occurrence of damage accompanying it, but on the other hand, the exclusive moving drive including the electric motor. Since the mechanism needs to be built into the main body of the circuit breaker, it cannot be applied to existing closed switchboards such as those currently in operation, and it requires extensive modification of the entire closed switchboard from the manufacturing stage. In addition to being easy to increase in size, there is a drawback that it becomes very expensive in terms of cost.

Therefore, the present invention has been made in view of the above-mentioned circumstances, and the inventions according to claims 1 and 3 effectively use the dead space of the existing closed switchboard without requiring major modification. A closed switchboard that can be improved to be an electric type that allows the circuit breaker body to be moved unattended by remote operation or remote operation simply by adding a simple configuration using it, and can also avoid impact at the time of connection It is an object of the present invention to provide a circuit breaker moving device for a vehicle.

Further, in addition to the object of the invention described in claims 1 and 3, the inventions described in claims 2 and 5 reliably stop the circuit breaker body at the connecting position and the disconnecting position and hold the position. The purpose is to be able to.

Further, in addition to the object of the invention described in claims 1 and 3, the invention described in claim 4 is a closed switchboard in which an electric transfer device is effectively arranged in a dead space of an existing closed switch box. The purpose is to enable further miniaturization of the whole.

[0008]

In order to achieve the above object, a circuit breaker moving device for a closed switchboard according to a first aspect of the present invention is a circuit breaker main body housed in a closed distribution box. In the closed switchboard configured to be movable along a floor surface of the closed distribution box between a connection position connected to the main circuit and a disconnection position separated from the main circuit, the circuit breaker is provided. On the floor of the closed distribution box on the side opposite to the side where the main circuit exists with respect to the main body, an electric motor, a speed reducer for reducing the rotation of the electric motor, and a jack for expanding and contracting along the moving direction of the circuit breaker main body. The electric circuit-moving device in which the tip of the jack is engaged and connected to the engaging piece attached to the circuit breaker main body is arranged and fixed, and the main circuit is connected to the circuit breaker main body. On the floor of the closed distribution box on the side opposite the side where the Focusing on the existing dead space and adding a simple configuration such as arranging the above-mentioned electric moving device in the dead space, the existing manually movable closed switchboard does not require major modification and is large in size. It is possible to improve the main body of the circuit breaker to an electric type that can be moved unattended by remote control or remote control. In addition, since the circuit breaker body moves at a constant speed by using the electric circuit in this manner, it is possible to reduce the impact acting on both contact portions when connecting to the main circuit.

Here, as the jack of the above-mentioned electric type moving device, as described in claim 2, it is composed of a spiral shaft which rotates at a fixed position and a movable cylindrical body which is engaged with the spiral shaft to expand and contract. In this case, it is possible to stably secure the function of connecting to the main circuit by locking the breaker body at its connection position and disconnection position without using a special lock mechanism.
In particular, in addition to the configuration of claim 2, when the circuit breaker body reaches the connecting position and the disconnecting position as described in claim 5, the circuit breaker comes into contact with a part of the movable tubular body. By providing a limit switch that detects the arrival of the main body and automatically stops the operation of the electric motor, the breaker body can be accurately stopped at the connection position and disconnection position even if the moving speed of the electric movement device changes slightly. The fixed position stop function can be surely exerted.

Further, in the case where a manual moving handle is used as the engaging piece on the circuit breaker main body side for engaging and connecting the tip end portion of the jack of the electric type moving device, as described in claim 3,
It can be used as it is as an engaging piece required when the handle originally attached to the existing manually movable closed switchboard is electrically improved, and the handle can be purposely removed to replace a new engaging piece. It is not necessary to attach it. That is, it is possible to further reduce the time and effort of remodeling when the existing manually movable closed switchboard is improved to the electric closed switchboard.

Further, the invention according to claim 4 is the configuration of the circuit breaker moving device for a closed switchboard according to the invention according to any one of claims 1 to 3, wherein an electric motor and a speed reducer which constitute the electric moving device are provided. The jack and the jack are arranged in a substantially U-shape. In this case, the electric moving device itself is made as short and compact as possible, and the moving device is projected outward from the dead space of the existing closed distribution box. It is possible to further reduce the size of the entire closed switchboard by arranging it so that it will not occur.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a circuit breaker moving device for a closed switchboard according to the present invention. In FIG. 1, reference numeral 1 denotes a circuit breaker main body housed in a closed distribution box 2, which is located above and below a front end portion thereof. Movable contact portions 1a, 1a are projected forward at two locations spaced apart from each other, and traveling wheels 1c, 1a are provided at the front and rear positions of the bottom portion thereof, respectively.
1c is mounted, and a manual movement handle 1b having a substantially gate shape in plan view which is used as an engagement piece described later is fixed to a lower position of the rear end portion. 3 is the main circuit,
Fixed contact portions 3a, 3a are provided at positions corresponding to the movable contact portions 1a, 1a of the circuit breaker body 1.

Traveling wheels 1c, 1c of the circuit breaker body 1
Is placed on the floor surface 2a of the closed distribution box 2,
The circuit breaker main body 1 is movable along the floor surface 2a.
and a disconnection position B where a and 1a are inserted and connected to the fixed contact portions 3a and 3a of the main circuit 3 and movable contact portions 1a and 1a are pulled out and separated from the fixed contact portions 3a and 3a of the main circuit 3, respectively. 1 is configured to be capable of reciprocating in the directions of arrows x1-x2 in FIG.

Reference numeral 4 denotes an electric moving device which is arranged and fixed via a pedestal 8 on the floor surface 2a of the closed distribution box 2 on the side opposite to the main circuit 3 side with respect to the circuit breaker body 1. The electric moving device 4 is roughly classified into an electric motor 5 and the electric motor 5.
And a jack 7 that expands and contracts along the moving direction x of the circuit breaker main body 1. The electric motor 5, the speed reducer 6 and the jack constituting the electric moving device 4 are connected to each other. As clearly shown in FIG. 2, 7 is arranged in a substantially angular U shape in a plan view.

The speed reducer 6 in the electric moving device 4
As shown in FIG. 4, an intermediate shaft 6b operatively connected to the output shaft 5a of the electric motor 5 through a pair of spur gears 9a and 9b and supported by a case 6a, and a pair of small and large decelerations for the intermediate shaft 6b. The jack 7 is composed of a gear type speed reducer having an output shaft 6e supported by a case 6a and interlocked with each other through spur gears 6c and 6d. The jack 7 includes a spiral shaft 7A that extends and rotates at a fixed position, and a movable cylindrical body 7B that is screwed onto the spiral shaft 7A and expands and contracts in the moving direction x of the circuit breaker body 1. A U-shaped cutout portion 7b as shown in FIG. 3 is formed at the tip of the movable cylindrical body 7B, and the U-shaped cutout portion 7b is engaged with the circuit breaker body 1 by using a handle for manual movement. After inserting the piece 1b, engage the knurled screw 10 with the engaging piece 1b. By retaining fit in the allowed, and cotter pin 11, the movable cylindrical member 7B by the rotation of the spiral shaft 7A of the jack 7 to engage connecting the jack 7 and the breaker body 1
The main body 1 of the circuit breaker is configured to be reciprocally movable in the directions of arrows x1 and x2 between two positions of the connection position A and the disconnection position B in accordance with the expansion and contraction operation.

Reference numeral 12 denotes a movable cylinder body 7 of the jack 7.
B is a guide tube that is fitted over B to guide the expansion and contraction operation of the movable cylindrical body 7B. As shown in FIG. 5, the guide cylinder 12 has a long hole shape along the expansion and contraction operation direction of the movable cylindrical body 7B. Slits 12a are formed, and the slits 12a
Limit switches 13A, 1 for controlling the operation and stop of the electric motor 5 at positions near both ends in the longitudinal direction of the motor.
3B is their actuators 13a and 13b are slits 12a.
It is mounted so as to project through the guide tube 12 to the inside of the guide tube 12, and when the breaker body 1 reaches the connection position A and the disconnection position B, the actuators 13a of the limit switches 13A, 13B, A switch actuating portion 14 that comes into contact with 13b is formed at the base end portion of the movable cylindrical body 7B of the jack 7, and the switch actuating portion 14 comes into contact with the actuators 13a and 13b of the limit switches 13A and 13B. The operation of the electric motor 5 is automatically stopped upon detecting that the circuit breaker body 1 has reached the connection position A and the disconnection position B.

Next, the operation of the circuit breaker moving device for a closed switchboard having the above structure will be briefly described. Electric motor 5
Is operated in the normal rotation direction and its rotational force is transmitted to the spiral shaft 7A of the jack 7 through the speed reducer 6 to reduce the speed, and the spiral shaft 7A is rotated at a constant low speed (normal rotation). The tubular body 7B is extended at a constant low speed in the direction of the arrow x1, and the circuit breaker main body 1 engaged and connected to the tip end portion of the movable tubular body 7B is extended along the floor surface 2a of the closed distribution box 2 with the extension operation. Move in the direction of arrow x1.

When the circuit breaker body 1 is moved to the connection position A as shown by the solid line in FIG. 1, the movable contact portions 1a, 1a are inserted into the fixed contact portions 3a, 3a of the main circuit 3. A predetermined connection is made, and at this point, the jack 7
The switch actuating portion 14 of the movable tubular body 7A comes into contact with the operator 13a of the one limit switch 13A, and the operation of the electric motor 5 is automatically stopped. Therefore, the circuit breaker body 1 is connected in a state in which almost no impact is generated. It is accurately stopped at the position A, and the stopped position is locked by the spiral shaft 7A, so that the connection function with the main circuit 3 is stably ensured.

Further, in the connected state shown in FIG. 1, the electric motor 5 is operated in the reverse direction, and its rotational force is decelerated and transmitted to the spiral shaft 7A of the jack 7 through the speed reducer 6 to rotate the spiral shaft 7A at a constant low speed. When rotated (reverse rotation) by, the movable cylinder 7B of the jack 7 contracts at a constant low speed in the arrow x2 direction,
With this contraction operation, the circuit breaker body 1 engaged and connected to the tip of the movable cylindrical body 7B moves in the direction of arrow x2 along the floor surface 2a of the closed distribution box 2 so that the movable contact portions 1a, 1a are mainly formed. The circuit is disconnected from the fixed contact portions 3a, 3a of the circuit 3 and is disconnected. Then, when the circuit breaker body 1 is moved to the disconnection position B as shown by the phantom line in FIG.
The switch actuating portion 14 of the movable tubular body 7A comes into contact with the operator 13b of the other limit switch 13B, and the operation of the electric motor 5 is automatically stopped, so that the circuit breaker main body 1 accurately moves to the predetermined disconnection position B. It will be stopped and its stop position will be locked by the spiral shaft 7A.

As described above, the floor surface 2a of the closed distribution box 2 on the side of the circuit breaker body 1 opposite to the side where the main circuit 3 is present.
By arranging the electric moving device 4 in the dead space existing above, the existing manually movable closed switchboard is
It was possible to improve the circuit breaker main body 1 to an electrically operated one that can be moved unmanned by remote control or operation from a distance without requiring a large modification and without increasing the size. Moreover, by making it electrically driven in this way, the moving speed of the circuit breaker body 1 is kept constant and the main circuit 3
The impact acting on both contact portions 1a, 3a at the time of the connection with can be made extremely small.

In the above embodiment, as the jack 7 of the electric movement device 4, the spiral shaft 7A and the spiral shaft 7A are used.
A movable cylinder body 7B which is screwed into and retracted to move the circuit breaker body 1 at its connection position A and disconnection position B without using a special lock mechanism.
The effect of making it possible to stably secure the connection function with the main circuit 3 by locking with, but a link mechanism type jack such as a pantograph type may be used.

[0022]

As described above, according to the first aspect of the present invention, it is easy to arrange the electric moving device in the dead space on the floor surface of the closed distribution box of the existing manually movable closed distribution board. By simply adding a simple configuration, economically without requiring major modification, and without increasing the size,
The circuit breaker body can be improved to an electrically-operated closed switchboard that can be moved unattended by remote control or remote control. Moreover, by making it electric like this,
Since there is no variation in the moving speed of the circuit breaker and it can be moved at a constant low speed, the impact acting on both contact parts etc. when connecting to the main circuit is also very small, and durability can be improved. It has the effect of being able to.

According to the invention as set forth in claim 2, in addition to the effect of the invention as set forth in claim 1, the breaker body can be brought to its connecting position and disconnecting position without using a special locking mechanism. It is possible to surely stop and lock the stop position, and it is possible to stably secure the connection function with the main circuit. In particular, according to the invention of claim 5 in which a limit switch is added to the configuration of the invention of claim 2, even if the moving speed of the electric moving device changes subtly, the breaker body is connected to the connecting position. Also, the fixed position stop function of accurately stopping at the disconnection position can be surely exhibited.

According to the third aspect of the present invention, the handle that is originally attached to the existing manually movable closed switchboard can be used as it is as an engaging piece that is necessary when the handle is electrically improved. It is possible to remove the handle and to attach a new engaging piece, and further reduce the work of remodeling the existing manually movable closed switchboard to an electric closed switchboard to reduce the cost. Cost can be reduced.

Further, according to the invention described in claim 4,
In addition to the effects of the invention described in claims 1 to 3, the electric moving device to be added is made as short and compact as possible, and the moving device is projected outward from the dead space of the existing closed distribution box. Therefore, it is possible to further reduce the size of the electric closed / closed switchboard.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a circuit breaker moving device for a closed switchboard according to the present invention.

FIG. 2 is an enlarged plan view of a main part of the circuit breaker moving device for a closed switchboard.

FIG. 3 is a partially sectional enlarged side view of an engagement connecting portion between a circuit breaker body and an electric movement device.

FIG. 4 is a partial cross-sectional plan view showing an enlarged electric movement device.

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

[Explanation of symbols]

 1 Circuit breaker body 1a Movable contact part 1b Engagement piece (handle for manual movement) 2 Closed distribution box 2a Floor surface 3 Main circuit 4 Electric movement device 5 Electric motor 6 Reducer 7 Jack 7A Spiral shaft 7B Movable cylinder 13A, 13B Limit switch A Connection position B Disconnection position

Claims (5)

[Claims] 1. A circuit breaker main body housed in a closed distribution box is provided between a connection position connected to a main circuit and a disconnection position separated from the main circuit along a floor surface of the closed distribution box. In a closed switchboard configured to be movable across, a motor and a speed reducer for decelerating the rotation of the motor on the floor surface of the closed switch box on the side opposite to the main circuit side with respect to the circuit breaker body. And a jack that expands and contracts along the moving direction of the circuit breaker body, and the electric movement device in which the tip end of the jack is engaged and connected to an engaging piece attached to the circuit breaker body is fixedly arranged. A circuit breaker moving device for a closed switchboard characterized by the above. 2. The closed switchboard according to claim 1, wherein the jack of the electric movement device is composed of a spiral shaft that rotates at a fixed position and a movable cylindrical body that engages with the spiral shaft to expand and contract. Circuit breaker moving device. 3. The circuit breaker moving device for a closed switchboard according to claim 1, wherein the engagement piece on the side of the circuit breaker body is a handle for manually moving the circuit breaker body. 4. The circuit breaker moving device for a closed switchboard according to claim 1, wherein the electric motor, the speed reducer, and the jack which constitute the electric moving device are arranged in a substantially U-shape. 5. When the circuit breaker main body reaches the connection position and the disconnecting position with the expansion and contraction operation of the movable cylinder body, the arrival of the circuit breaker main body is detected by contacting a part of the movable cylinder body, The circuit breaker moving device for a closed switchboard according to claim 2, further comprising a limit switch for automatically stopping the operation of the electric motor.