JP2002150900A - Operation equipment of breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to perform a path opening operation or a path closing operation by one electromagnet. SOLUTION: The electromagnet 53, which transmits driving force by making a plunger 53a contact to a pulling out trigger 51 when between both contact element 35 and 36 is open-circuited, and an auxiliary lever 54, which transmits the driving force of the electromagnet 53 to a closing trigger 44, are equipped. At this time, the plunger 53a is removed from the position, in which contacting is possible, by joining with the pulling out trigger 51 when between both the contact elements 35 and 36 is closed by being supported with the closing trigger 44. The plunger 53a moves to the position, in which contacting is possible, by releasing the joining with the pulling out trigger 51 when between both the contact elements 35 and 36 is open-circuited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker operating device installed in, for example, a substation or a switchyard.

[0002]

2. Description of the Related Art FIG.
FIG. 9 is a perspective view of a conventional circuit breaker operating device described in Japanese Patent Application Publication No. 2 and FIG. 9 is a configuration diagram showing a closed state. In FIGS. 8 and 9, the lever 1 is always given a counterclockwise rotational force by the torsion bar 2, and the rotational force is held by the trip latch 3 and the trip trigger 4. When the opening electromagnet 5 is excited in this state, the plunger 5a moves rightward in the drawing and the trip trigger 4 rotates clockwise, so that the trip trigger 4 and the trip latch 3 are engaged. Is released. As a result, the tripping latch 3 rotates counterclockwise by the reaction force from the pin 6. When the trip latch 3 is disengaged from the pin 6 fixed to the lever 1, the lever 1 rotates counterclockwise and the movable contact 7 is driven in the blocking direction, and the movable contact 7 is separated from the fixed contact 8 The opening operation is completed as shown in FIG. A case where the circuit is closed from the open state in FIG. 10 will be described. In FIG. 10, a cam 9 is a lever 1 via a cam shaft 10, a large gear 11 and a link 12.
3, and a clockwise rotational force is applied by the torsion bar 14. The turning force of the cam 9 is held by the closing latch 15 and the closing trigger 16. When the closing electromagnet 17 is excited in this state, the plunger 1
7a moves rightward in the figure, and the closing trigger 16 rotates clockwise, so that the engagement between the closing trigger 16 and the closing latch 15 is released. As a result, the closing latch 15 rotates counterclockwise by the reaction force from the pin 18 fixed to the cam 9. When the closing latch 15 is disengaged from the pin 18, the cam 9 rotates clockwise to push up the roller 19 provided on the lever 1. Thus, the lever 1 is driven while twisting the torsion bar 2 clockwise, and the movable contact 7 comes into contact with the fixed contact 8 to complete the closing operation as shown in FIG. Thereafter, the torsion bar 14 in the released state is charged via the large gear 11 from the small gear 20 connected to the motor (not shown), and returns to the state of FIG.

[0003]

Since the conventional circuit breaker operating device is constructed as described above, the two contacts 7, 8 are provided.
Since the opening electromagnet 5 for opening the circuit and the closing electromagnet 17 for closing the circuit are required, there is a problem that it is difficult to simplify the structure. The present invention
Opening and closing operations can be performed by one electromagnet,
It is an object of the present invention to provide a circuit breaker operating device having a simple structure.

[0004]

An operation mechanism of a circuit breaker according to the present invention drives an trip trigger to release the engagement of the trip latch engaged with the trip trigger and to release the open spring. The movable contact is opened from the fixed contact by the accumulating force, the closing trigger is driven to release the engagement between the closing trigger and the closing latch, and the contact between the two contacts is closed by the storing force of the closing spring. In the circuit breaker operating device, an electromagnet for transmitting a driving force by bringing a plunger into contact with a trip trigger when both contacts are closed, and a contact between the two contacts supported by a closing trigger. When the circuit is closed, it is engaged with the trip trigger and the plunger is released from the position where it can be contacted.When both contacts are open, the engagement with the trip trigger is released and the plunger can be contacted. To the desired position and transmit the driving force of the electromagnet to the closing trigger. It is obtained by a lever. Further, the trip trigger and the closing trigger are rotatably supported on the same support shaft.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a configuration diagram of the first embodiment, FIG. 2 is an explanatory diagram showing a main part of FIG. 1, and FIG.
FIG. 2 is a perspective view showing a main part of FIG. 1. 1 to 3, reference numeral 20 denotes a housing, 21 denotes a cam shaft rotatably supported by the housing 20, 22 denotes a cam fixed to the cam shaft 21, and 23 denotes a rotatably supported by the housing 20. The rotation shafts 24 are open-circuit springs each including a torsion bar having one end fixed to the rotation shaft 23, and the other end fixed to the housing 20. Reference numeral 25 denotes a rotating shaft rotatably supported by the housing 20. Reference numeral 26 denotes a closing spring formed of a torsion bar having one end fixed to the rotating shaft 25, and the other end fixed to the housing 20. The torsion bars of the open circuit spring 24 and the closed circuit spring 26 can obtain a spring load by a torsional force. Reference numeral 27 denotes a lever fixed to the rotating shaft 23, which is provided with a counterclockwise driving force by the opening spring 24. The lever 27 is provided with a sliding portion 27a for guiding a trip latch 45 described later. 28 is a pin fixed to the lever 27, 29 is a roller rotatably supported by the lever 27, and 30 is a rotating shaft 2
A lever 31 fixed to 5 is a rotating shaft rotatably supported by the housing 20 and is driven counterclockwise by a motor (not shown). Numeral 32 is a small gear fixed to the rotating shaft 31, and 33 is a large gear fixed to the camshaft 21 and meshing with the small gear 32. When the closing spring 26 is in an energized state,
Some teeth are missing so as to disengage with the small gear 32. 34 is a link connecting the lever 30 and the large gear 33.

The camshaft 21 is provided with a clockwise rotating force by the closing spring 26 at a position where the direction of the tensile load of the link 34 exceeds the dead point where the direction intersects the center of the camshaft 21 in the clockwise direction. Is configured. 35
Is a fixed contact, and 36 is a movable contact that can be brought into contact with and separated from the fixed contact 35, and is connected to the lever 27 via a link mechanism 37. Numeral 38 denotes a shock absorber connected to the lever 27, which reduces the shock when the movable contact 36 is opened and closed. Reference numeral 39 denotes a pin fixed to the cam 22, and reference numeral 40 denotes a closing latch whose one end is rotatably supported by the shaft 41. The closing latch engages with the pin 39 to prevent the stored closing spring 26 from being released. . 42 is a pin fixed to the other end of the closing latch 40, 43 is a spring that presses the closing latch 40 clockwise, 44 is a closing trigger rotatably supported on a support shaft 45, and one end is engaged with the pin 42. Thus, the closing latch 40 is prevented from rotating in the counterclockwise direction. Reference numeral 46 denotes a spring which presses the closing trigger 44 in a clockwise direction. A stopper 44a for holding a position of an auxiliary lever 54 described later is formed at the other end of the closing trigger 44. Reference numeral 47 denotes an extraction latch rotatably supported on a shaft 48, one end of which is engaged with the pin 28 to prevent the lever 27 from rotating counterclockwise. 49 is a pin fixed to the tripping latch 47, 50 is a spring that presses the tripping latch 47 clockwise, 51 is a tripping trigger rotatably supported by the support shaft 45, and one end of the tripping trigger is engaged with the pin 49. Combined trip latch 4
7 is prevented from rotating counterclockwise. Note that the tripping trigger 51 has a contact portion 51a that contacts an auxiliary lever 54 described later.

Reference numeral 52 denotes a spring that presses the trip trigger 51 clockwise, and 53 denotes an electromagnet having a plunger 53a.
A driving force for driving the closing trigger 44 and the trip trigger 51 is generated. Reference numeral 54 denotes an auxiliary lever rotatably supported at the other end of the closing trigger 44 by a shaft 55, and a contact portion 51a of the trip trigger 51 when the contact between the contacts 35 and 36 is closed.
, So that the plunger 53a is displaced from a position where the plunger 53a can abut. Further, the auxiliary lever 54 is provided when the contact between the contacts 35 and 36 is open.
1 is disengaged from the contact portion 51a, and the plunger 5
3a is moved to a position where it can come into contact, and the state in which it comes into contact with the stopper 44a of the insertion trigger 44 is maintained. Reference numeral 56 denotes a spring, which presses the auxiliary lever 54 toward the contact portion 51a of the trip trigger 51.

Next, the operation will be described. 1 to 3
Indicates a state in which the contact between the contacts 35 and 36 is closed. When the electromagnet 53 is excited in this state, the plunger 53a moves leftward and drives the trip trigger 51 counterclockwise. Thereby, the trip trigger 51 and the pin 4
9 is released, so that the trip latch 47 is
8 rotates counterclockwise by the reaction force. When the trip latch 47 comes off the pin 28, the lever 27 rotates counterclockwise. As a result, as shown in FIG.
The circuit between 5 and 36 is opened, and the opening operation is completed. Each trigger 44 and 51 and each latch 40, when the opening operation is completed,
The relationship of 47 is shown in FIGS. When the lever 27 rotates counterclockwise, the sliding portion 27a
Is lifted counterclockwise against the spring 50. And
Since the pin 49 holds the trip trigger 51 counterclockwise about the support shaft 45, the engagement between the contact portion 51a of the trip trigger 51 and the auxiliary lever 54 is released. At this time, the auxiliary lever 54 is moved by a spring 56 as shown in FIG.
Is rotated clockwise as shown in FIG.
4 is held in contact with the stopper 44a.
In this state, the auxiliary lever 54 faces the plunger 53a at a position where the plunger 53a is driven when the electromagnet 53 is excited.

Next, the closing operation will be described. In the closed state shown in FIGS. 4 to 6, the closing spring 2 is attached to the camshaft 21.
6 provides a clockwise rotational force. But,
The closing latch 40 engaged with the pin 39 is
Is engaged with the closing trigger 44, the rotation of the camshaft 21 is prevented. When the electromagnet 53 is excited in this state, the plunger 53a is driven, moves to the left, comes into contact with the auxiliary lever 54, and the driving force of the electromagnetic force is transmitted to the closing trigger 44. For this reason,
Since the closing trigger 44 rotates counterclockwise about the support shaft 45, the engagement between the closing trigger 44 and the pin 42 is released. Then, the closing latch 40 rotates counterclockwise by the reaction force from the pin 39, and the engagement between the closing latch 40 and the pin 39 is released. As a result, the cam 22 rotates clockwise and pushes up the roller 29, so that the lever 27 rotates clockwise about the rotation shaft 23. When the lever 27 rotates clockwise, the movable contact 36 is driven in the closing direction to make contact with the fixed contact 35. Further, when the lever 27 rotates clockwise to close the path between the two contacts 35 and 36, the opening spring 24 is charged.

On the other hand, when the lever 27 rotates clockwise, the trip latch 47 rotates clockwise by the force of the spring 50 and engages with the pin 28. Further, the trip trigger 51 rotates clockwise by the force of the spring 52 and engages with the pin 49. This prevents the lever 27 from rotating counterclockwise due to the accumulated force of the opening spring 24. Then, the auxiliary lever 54 is brought into contact with the contact portion 51a of the trip trigger 51.
3, the plunger 53a of the electromagnet 53 has been removed from the position where it can abut. That is, when the contact between the two contacts 35 and 36 is closed, the closing trigger 44 is closed.
This is an interlock mechanism for preventing malfunction of the device. Here, the closing operation is completed and the state shown in FIG. 7 is obtained. In this state, the closing spring 26 is kept released. Next, the energy storing operation will be described. In FIG. 7, a motor (not shown)
When the small gear 32 is rotated in the counterclockwise direction, the large gear 33 is rotated in the clockwise direction, and the closing spring 26 is charged via the link 34, the lever 30 and the rotating shaft 25. The direction of the tensile load of the link 34 is the camshaft 2
Energy is accumulated to a position beyond the dead point intersecting the center of 1 in the clockwise direction. Then, since a part of the teeth of the large gear 33 is missing, the engagement with the small gear 32 is released. Here, since the pin 39 is engaged with the closing latch 40 and the closing latch 40 is prevented from rotating by the closing trigger 44, the clockwise turning force of the large gear 33 is maintained. Thereby, the energy storing operation is completed, and the state returns to the state of FIG. 1 again.

As described above, when the path between the contacts 35 and 36 is closed, the plunger 53a of the electromagnet 53 is closed.
Is brought into contact with the trip trigger 51 to transmit the driving force, and when the contact between the contacts 35 and 36 is closed, the auxiliary lever 54 supported by the closing trigger 44 is engaged with the trip trigger 51, The auxiliary lever 54 is removed from the position where the plunger 53a can abut, and when the contact between the contacts 35 and 36 is open, the auxiliary lever 54 is disengaged from the trip trigger 51.
By moving the auxiliary lever 54 to a position where the plunger 53a can abut, and transmitting the driving force of the electromagnet 53 to the closing trigger 44, a single electromagnet can be used for the tripping trigger 51 and the closing trigger 44. Since the opening and closing operations can be performed by transmitting the driving force, the structure can be simplified. Further, since the trip trigger 51 and the closing trigger 44 are rotatably supported by the same support shaft 45, the structure can be simplified.

[0012]

According to the present invention, when the contact between the two contacts is closed, the driving force is transmitted by bringing the plunger of the electromagnet into contact with the trip trigger. When the auxiliary lever supported by the closing trigger is engaged with the trip trigger, the auxiliary lever is removed from the position where the plunger can abut. Is disengaged, the auxiliary lever is moved to a position where the plunger can contact, and the driving force of the electromagnet is transmitted to the closing trigger. Since the opening and closing operations can be performed by transmitting the driving force to the trigger, the structure can be simplified. Further, since the trip trigger and the closing trigger are rotatably supported by the same support shaft, the structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a closed state according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a main part of FIG. 1;

FIG. 3 is a perspective view showing a main part of FIG. 1;

FIG. 4 is an explanatory diagram showing an open state of FIG. 1;

FIG. 5 is an explanatory diagram showing a main part of FIG. 4;

FIG. 6 is a perspective view showing a main part of FIG. 4;

FIG. 7 is an explanatory diagram showing a released state of a closing spring.

FIG. 8 is a perspective view of a conventional circuit breaker operating device.

FIG. 9 is a configuration diagram showing a closed state of FIG. 8;

FIG. 10 is an explanatory diagram showing a state where the opening operation of FIG. 8 is completed.

11 is an explanatory diagram showing a state in which the closing operation of FIG. 8 has been completed.

[Explanation of symbols]

24 Opening spring, 26 Closing spring, 35 Fixed contact, 36 Movable contact, 40 Closing latch, 44 Closing trigger, 45 Support shaft, 47 Tripping latch, 51 Tripping trigger, 53 Electromagnet, 53a Plunger, 54
Auxiliary lever.

Claims (2)

[Claims] 1. A trip trigger is driven to release the engagement of the trip latch with the trip latch, and the movable contact is opened from the fixed contact by the accumulating force of the opening spring. Operating the closing trigger to release the engagement between the closing trigger and the closing latch and to close the two contacts by the biasing force of the closing spring; An electromagnet that transmits a driving force by bringing a plunger into contact with the trip trigger when the child is closed;
When the contact between the two contacts is closed, the plunger is disengaged from the position at which the plunger can be brought into contact when the contact between the two contacts is closed. And an auxiliary lever for transmitting the driving force of the electromagnet to the closing trigger when the engagement with the trip trigger is released and the plunger moves to a position where the plunger can abut. Operating device. 2. The operating device for a circuit breaker according to claim 1, wherein the trip trigger and the closing trigger are rotatably supported on the same support shaft.