JP3220853B2 - Circuit breaker moving device for closed switchboard - Google Patents

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 which is used by being installed in a substation or the like. More specifically, the circuit breaker body housed in a closed switchboard is connected to a main circuit. The present invention relates to a device for moving between a connection position to be connected and a disconnection position separated from a main circuit.

[0002]

2. Description of the Related Art As a conventional circuit breaker moving device for a closed switchboard of this type, a circuit breaker body accommodated in a closed switchboard is connected between a connection position and a disconnection position by a screw mechanism with a handle or the like. Incorporating a manual type that is configured to move and a dedicated movement drive mechanism including a motor in the breaker body, and shutting off by controlling the motor by remote operation or operation from a distance using a dedicated line 2. Description of the Related Art There is known an electric device configured to drive and move a container body in a predetermined direction.

[0003]

Among the above, in the case of a manual circuit breaker moving device, it is troublesome that one person has to enter a closed distribution box installed in a substation or the like and perform a moving operation. In addition to requiring time-consuming work, there is a large variation (individual difference) in the moving speed when connecting the breaker body to the main circuit, An unexpected large impact is likely to cause damage.

[0004] On the other hand, the motor-driven circuit breaker moving device is capable of moving the circuit breaker body unattended by remote operation or remote operation, and has a low moving speed and constant connection. Although it has the advantage of avoiding the impact and the accompanying damage during the time, the existing closed switchboard, such as one currently in operation, is required to incorporate a dedicated moving drive mechanism including a motor in the breaker body. It cannot be applied, and requires a major remodeling of the entire closed switchboard from the manufacturing stage, which tends to increase the size and to be very expensive in terms of cost.

[0005] The applicant of the present invention discloses an improved motorized type in which the circuit breaker body is moved unattended by remote operation or remote operation without largely modifying the existing closed switchboard. There has been proposed a circuit breaker moving device for a closed switchboard having a configuration as disclosed in the official gazette. The circuit breaker moving device for a closed switchboard previously proposed by the present applicant (hereinafter referred to as prior art) utilizes a dead space existing on a floor surface in a closed switchboard on the front side of a circuit breaker body, In this space, an electric moving device including an electric motor, a speed reducer, and a jack is arranged, and an engaging piece attached to a breaker body is engaged and connected to a tip portion of the jack in the electric moving device. It is.

However, according to the prior art having the above structure, the entire length of the electric moving device is longer than at least the moving stroke between the connection position and the disconnection position of the breaker body, and the electric moving device has a longer total length. Since the entire device is completely separated spatially from the breaker body and is arranged in the front space in the closed switchboard, in other words, the space occupied by the motorized moving device itself is shifted forward in the closed switchboard. Because it is necessary to secure a long space, it cannot be applied to existing closed switchboards that do not originally have a long space in front of the circuit breaker main body. If it is to be extended, not only does it cost a great deal of time to extend the construction, but also the size of the entire closed switchboard becomes large, which adversely affects the surrounding facilities and equipment. There is a disadvantage that to become.

[0007] The present invention has been made in view of the above-mentioned circumstances, and does not require significant remodeling or increase in size, and effectively and rationally utilizes the dead space of a closed switchboard. An object of the present invention is to provide a circuit breaker moving device for a closed switchboard, which can easily improve the movement of the circuit breaker main body even for an existing device having no long space in front.

Another object of the present invention is to make it possible to easily move the circuit breaker body manually even when a trouble occurs in the electric moving device.

[0009]

In order to achieve the above object, a circuit breaker moving device for a closed switchboard according to the first aspect of the present invention is a circuit breaker body housed in a closed switch box. Wherein the circuit breaker is 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. On the floor surface in the closed distribution box on the back side of the main body, two motors are disposed on both sides in the width direction of the circuit breaker main body and are interlocked with each other via a connecting shaft to reduce the rotation of the motor. Two jacks arranged on both sides in the width direction of the speed reducer and the circuit breaker main body and reciprocating in the direction of movement of the circuit breaker main body, and a breaker fixedly connected between movable members of the two jacks It consists of a moving bracket An electric moving device in which the circuit breaker main body is connected and connected to a moving metal fitting is arranged and fixed. Paying attention to the fact that there is a dead space on the floor between the distribution box and each of the components of the electric moving device according to the form of the dead space, only the electric moving device is used. It is no longer necessary to occupy the space occupied by the closed distribution box, and even with an existing closed distribution panel that does not have a long space in front, the cost of significantly modifying the breaker body and extending the closed distribution panel forward is expensive. An electric motor that can be moved unattended by remote operation or remote operation of the circuit breaker body without the need for installation that would take time and increase the size It can be improved to that of. Further, by using the electric type in this way, the moving speed of the circuit breaker main body becomes constant, and it is possible to extremely reduce the impact acting on both contact portions when connecting to the main circuit. Furthermore, the breaker body is operated by the expansion and contraction force of two jacks arranged on both sides in the width direction.
It is possible to smoothly move without generating a twist or the like.

Here, the electric motor, the connecting shaft, the two reduction gears and the two jacks that constitute the electric moving device are arranged in a U-shape in plan view. As a result, the electric moving device itself mounted inside the existing closed switchboard can be made structurally strong and can reliably and stably exhibit a predetermined circuit breaker function. Further, as the two jacks of the electric moving device, as described in claim 3, a helical shaft rotating at a fixed position and screwed with the helical shaft to reciprocate along the moving direction of the circuit breaker body. In the case where the circuit breaker and the movable member are used, the circuit breaker main body can be locked at the connection position and the disconnection position without using a special lock mechanism, and the connection function with the main circuit can be stably secured.

Further, as the connecting means for connecting the circuit breaker moving bracket and the circuit breaker body in the electric moving device, the female screw member fixed to the widthwise central portion of the circuit breaker moving bracket as described in claim 4 is provided. In the case of employing a screwing means with a male screw member rotatably supported at the center in the width direction on the circuit breaker body side, when the two are connected and connected to each other to electrically move the circuit breaker body, It is easy to set and adjust the initial position of the breaker body, and when a failure occurs in the electric moving device, disconnect the connection between the two to remove only the electric moving device from the closed switchboard. Maintenance such as repair and replacement of parts can be easily performed. In particular, a handle capable of rotating the male screw member is detachably provided at a front end of the male screw member on the circuit breaker body side, and the male screw member is rotated via the handle. When the circuit breaker body is configured to be manually movable between the connection position and the disconnection position according to the above, when a trouble occurs in the electric moving device, the circuit breaker body can be easily and manually operated at any time. Can be moved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a schematic side view of a circuit breaker moving device for a closed switchboard according to the present invention, and FIG. 2 is an enlarged plan view of a main part. In each of these figures, 1 is a circuit breaker body housed in a closed switchboard 2. The movable contact portions 1a and 1 are provided rearward at two locations spaced apart above and below the rear end.
a is protruded, and running wheels 1c, 1c are respectively mounted on front and rear positions of the bottom. Reference numeral 3 denotes a main circuit, which is a movable contact portion 1a,
Fixed contact portions 3a, 3a are provided at positions corresponding to 1a.

The traveling wheels 1c, 1c of the circuit breaker body 1
On the floor 2a of the closed distribution box 2,
The circuit breaker body 1 is moved along the floor
a, 1a is a connection position A at which the fixed contacts 3a, 3a of the main circuit 3 are inserted and connected; and a disconnection position B, at which the movable contacts 1a, 1a are withdrawn and separated from the fixed contacts 3a, 3a of the main circuit 3. Are configured to be able to reciprocate in the directions of arrows X1-X2 in FIG.

Reference numeral 4 denotes an electric moving device which is arranged and fixed on the floor surface 2a of the closed distribution box 2 on the rear side of the circuit breaker main body 1 via fixed support legs 4b with pedestals 4a. As shown in FIG. 2, the electric moving device 4 includes one DC motor 5.
And two speed reducers 6, 6 arranged on both sides in the width direction of the circuit breaker main body 1 to reduce the rotation of the electric motor 5, and the circuit breaker so as to interlock these two speed reducers 6, 6 with each other. A connecting shaft 8 disposed in a back space S1 formed between the back surface of the main body 1 and the main circuit 3, both side portions in the width direction of the circuit breaker main body 1, and right and left side plates 2 of the closed distribution box 2
b, 2b and two jacks 7, 7 arranged in both side spaces S2, S2 and reciprocating along the moving direction X1-X2 of the circuit breaker body 1, and these jacks 7, 7 And a plate-shaped circuit breaker moving bracket 15 fixedly connected between movable members 7B, 7B to be described later, and a motor 5, a connecting shaft 8, and a deceleration of two motors constituting the electric moving device 4. The machines 6, 6 and the two jacks 7, 7 are arranged in a substantially U-shape in plan view, as clearly shown in FIG. In addition, traveling wheels 4c, 4c are attached to the electric moving device 4, and lifting is prevented by rails 2c, 2c fixed on the floor 2a of the closed distribution box 2. .

A female screw member 10 having a female screw portion 10a is fixed to the center of the circuit breaker moving bracket 15 in the width direction of the electric moving device 4 having the above-described configuration. A screw shaft 11, which is a male screw member, is rotatably supported at the center in the width direction with its rear end 11 a protruding rearward of the breaker body 1. As shown in FIG. Rear end 1 of shaft 11
By screwing 1a into the female screw portion 10a of the female screw member 10, the circuit breaker moving bracket 15 and the circuit breaker main body 1 are integrally connected so as to be movable. At the front end of the screw shaft 11, a handle 12 capable of rotating the screw shaft 11 is provided detachably via well-known concave / convex engagement means. 11
The circuit breaker main body 1 can be manually moved between the connection position A and the disconnection position B by rotating.

As shown in FIG. 4, one of the speed reducers 6 in the electric moving device 4 is linked to an output shaft 5a of the electric motor 5 via a pair of spur gears 9a and 9b.
a through a large-diameter spur gear 6c meshing with an intermediate shaft 6b supported on the intermediate shaft 6b and a spur gear 9b fixed to the intermediate shaft 6b.
b, and a gear type reduction gear having an output shaft 6d supported by a case 6a in conjunction with the output shaft 6d.
By directly connecting the connection shaft 8 directly connected to the output shaft 6d of the other reduction gear 6, the two reduction gears 6 and 6 are interlocked, and the jacks 7 are shown in FIGS.
As described above, the bevel gears 7a and 7b and the worm 7c and the worm 7c and the worm 7c and the worm wheel 7d are interlocked to the output shaft 6d of the two reduction gears 6 via a pair of bevel gears 7a and 7b and the worm 7c. Case 7
e, a spiral shaft 7A extending integrally and rotating at a fixed position, and the movable member 7B screwed to the spiral shaft 7A and reciprocating in the moving direction X1-X2 of the circuit breaker body 1. The movable members 7B of the two jacks 7, 7
The circuit breaker moving bracket 15 is fixedly connected between 7B.

Reference numerals 13A and 13B denote limit switches fixedly installed on the floor surface 2a of the closed distribution box 2 at positions on the side of the moving path of the circuit breaker main body 1. Actuators 13a and 13b of these limit switches 13A and 13B are provided. A switch operating portion 14 that contacts the circuit breaker body 13 is attached to a side portion of the circuit breaker main body 1, and the switch operating portion 14 contacts the operators 13 a and 13 b of the limit switches 13 A and 13 B. 1 is configured to detect that it has reached the connection position A and the disconnection position B, and to automatically stop the operation of the electric motor 5.

Next, the operation of the circuit breaker moving device for a closed switchboard having the above configuration will be briefly described. Electric motor 5
Is operated in the forward rotation direction, and its rotational force is transmitted via the connecting shaft 8 and the reduction gears 6, 6 to the helical shafts 7A, 7A of the jacks 7, 7.
When the helical shafts 7A, 7A are rotated (forward rotation) at a constant low speed by transmitting the deceleration to the movable members 7B,
7B moves at a constant low speed in the direction of arrow X1. With this movement, the breaker moving bracket 15 fixedly connected between the two movable members 7B, 7B moves in the same direction, and the screw shaft 11 and the female screw member 10 are moved. Then, the circuit breaker body 1 coupled and moved along the floor surface 2a of the closed distribution box 2 in the direction of the arrow X1.

When the circuit breaker main 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 time, the switch operating part 14 attached to the circuit breaker main body 1 abuts on the actuator 13a of one of the limit switches 13A, and the operation of the electric motor 5 is automatically stopped. Therefore, the breaker body 1
Is accurately stopped at the connection position A with almost no impact, and the stop position is locked by the spiral shaft 7A, so that the connection function with the main circuit 3 is stably secured.

In the connection state shown in FIG. 1, the electric motor 5 is operated in the reverse direction to rotate the
Helical shafts 7A, 7 of jacks 7, 7 via reduction gears 6, 6
When the helical shafts 7A, 7A are rotated (reversely rotated) at a constant low speed by transmitting the deceleration to A, the movable members 7 of the jacks 7, 7 are rotated.
B, 7B and the circuit breaker moving bracket 15 move at a constant low speed in the direction of the arrow X2. With this movement, the circuit breaker moving bracket 15 moves in the same direction, and the screw shaft 11 and the female screw member 10 are moved.
The circuit breaker main body 1 coupled and connected by the above moves in the direction of arrow X2 along the floor surface 2a of the closed distribution box 2, and the movable contact portions 1a, 1a are pulled out of the fixed contact portions 3a, 3a of the main circuit 3. It is disconnected. When the circuit breaker main body 1 is moved to the disconnection position B as shown by the phantom line in FIG.
, The operation of the electric motor 5 is automatically stopped, so that the circuit breaker main body 1 is accurately stopped at the predetermined disconnection position B, and the stop position is locked by the spiral shaft 7A. become.

As described above, the dead spaces S1, S2 existing on the floor surface 2a between the circuit breaker body 1 and the closed distribution box 2 accommodating the circuit breaker body 1 on the back side and the width direction both sides of the circuit breaker body 1. By arranging the components 5, 6, 7, and 8 of the electric moving device 4 according to the configuration of the electric moving device 4, it is necessary to provide a space occupied only by the electric moving device 4 in the closed distribution box 2. Even if it is an existing closed switchboard that does not have a long space in front of it, remote control of the circuit breaker body 1 can be performed without the need for a major modification to the circuit breaker body 1 and the construction of extending the closed switchboard 2 forward. It was possible to improve the motor-operated type, which can be moved unattended by operation from a distant place, and by using such an electric type, the moving speed of the circuit breaker main body 1 can be kept constant. To, both contact portions 1a at the time of connection to the main circuit 3, the impact acting on such 3a is also became possible to very small.

In the above embodiment, the jack 7 of the electric moving device 4 is constituted by a helical shaft 7A and a movable member 7B which is screwed to the helical shaft 7A and reciprocates. Thereby, it is possible to lock the circuit breaker main body 1 at the connection position A and the disconnection position B without using a special lock mechanism, and to stably secure the connection function with the main circuit 3. However, a jack of a link mechanism type such as a pantograph type may be used.

[0023]

As described above, according to the first aspect of the present invention, the floor surface between the circuit breaker main body and the closed distribution box accommodating the circuit breaker main body on the back side and the width direction both sides of the circuit breaker main body. Only the electric moving device occupies the dead space existing above by effectively and rationally using such as arranging the components of the electric moving device according to the form of the dead space. There is no need to provide space in a closed distribution box, and even with an existing closed distribution panel that does not have a long space in front, the cost of significant modification to the breaker body and extension of the closed distribution panel to the front is required, and It can be improved to an electric type that can move the circuit breaker body unattended by remote operation or remote operation without the need for construction that leads to enlargement. . In addition, by using such an electric type, there is no variation in the moving speed of the circuit breaker body,
Since it can be moved at a constant low speed, an impact acting on both contact portions and the like at the time of connection to the main circuit is very small, and the durability can be improved. Moreover,
Since the breaker main body is moved by the operating forces of the two jacks arranged on both sides in the width direction, there is an effect that the breaker main body can always be smoothly moved without generating a twist or the like.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, the electric moving device itself mounted in the existing closed switchboard is structurally strong. Thus, the predetermined circuit breaker function can be surely and stably exhibited, and according to the invention as set forth in claim 3, in addition to the above effects, the circuit breaker can be provided without using a special lock mechanism. The main body can be reliably stopped at the connection position and the disconnection position, and the stop position can be locked, so that the connection function with the main circuit can be secured stably.

According to the fourth aspect of the present invention, there is provided a circuit breaker for improving the male and female screw members originally attached to an existing manually movable closed switchboard utilizing a screw mechanism to an electric type. It can be used as a component for connecting and connecting the main body and the breaker moving bracket, not only reducing the cost required for improvement, but also making it easy to set and adjust the initial position of the breaker main body when electrically moving In addition, when a failure or the like occurs in the electric moving device, the connection between the two is released, so that only the electric moving device is taken out of the closed switchboard to easily perform maintenance such as repair and replacement of parts. Can be. In particular, according to the invention described in claim 5, even when a trouble occurs in the electric moving device, the circuit breaker main body can be easily moved manually at any time.

[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 according to the first embodiment;

FIG. 3 is an enlarged plan view of a coupling connecting portion between the circuit breaker main body and the electric moving device.

FIG. 4 is an enlarged vertical sectional front view of a main part showing a configuration of a speed reducer and a jack in the electric moving device.

FIG. 5 is a side view from the direction of arrows YY in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Breaker main body 1a Movable contact part 2 Closed distribution box 2a Floor 3 Main circuit 4 Electric moving device 5 Electric motor 6 Reduction gear 7 Jack 7A Helical shaft 7B Movable member 8 Connecting shaft 10 Female screw member 11 Screw shaft (male member) 15 Circuit breaker moving bracket A Connection position B Disconnection position

Continuation of the front page (56) References JP-A-7-46724 (JP, A) JP-A 53-115333 (JP, U) JP-A 61-41307 (JP, U) JP-A 59-195918 (JP) , U) Shokai Sho 59-85007 (JP, U) Shoko Sho 9-11724 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02B 11/167

Claims (5)

(57) [Claims] A circuit breaker body accommodated in a closed distribution box is provided between a connection position connected to a main circuit along a floor surface of the closed distribution box and a disconnection position separated from the main circuit. A closed switchboard configured to be movable across the motor, and on the floor surface in the closed switchboard box on the back side of the circuit breaker body, disposed on both sides in the width direction of the motor and the circuit breaker body, and via a connection shaft. And two jacks which are interlocked with each other to reduce the rotation of the electric motor, and two jacks which are arranged on both sides in the width direction of the circuit breaker main body and reciprocate along the moving direction of the circuit breaker main body. A circuit breaker moving bracket fixedly connected between the movable members of the two jacks, and an electric moving device in which the circuit breaker body is connected and connected to the circuit breaker moving bracket is arranged and fixed. Circuit breaker for closed switchboard Apparatus. 2. An electric motor constituting the electric moving device,
The connecting shaft, two reduction gears and two jacks
The circuit breaker moving device for a closed switchboard according to claim 1, wherein the device is arranged in a U-shape in plan view. 3. The two jacks of the electric moving device include a helical shaft that rotates at a fixed position and the movable member that is screwed to the helical shaft and reciprocates along the moving direction of the circuit breaker main body. The circuit breaker moving device for a closed switchboard according to claim 1 or 2, wherein 4. A female screw member is fixed to the widthwise central portion of the circuit breaker moving bracket in the electric moving device, and a male screw member is rotatably supported at the widthwise central portion on the circuit breaker body side. The circuit breaker moving device for a closed switchboard according to any one of claims 1 to 3, wherein the circuit breaker moving bracket and the circuit breaker main body are connected to each other by screwing the male and female screw members. . 5. A handle capable of rotating the male screw member is detachably provided at a front end of the male screw member on the circuit breaker main body side, and when the electric moving device is in a non-operating state, The circuit breaker for a closed switchboard according to claim 4, wherein the circuit breaker main body is manually movable between the connection position and the disconnection position by rotating the male screw member via the handle. Moving equipment.