JPH0134831Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electromagnetic operating device for circuit breakers and breakers, and in particular, it is an electromagnetic operating device for circuit breakers and breakers that opens and closes loads from a distance by electromagnetic operation.

Previously, the present applicant has developed a device that plays the main role in opening and closing, as shown in FIG. By combining the first solenoid electromagnet 1 that makes the closing connection of the disconnector B and the second tripping electromagnet 19 that only trips the closing connection, power consumption can be minimized and proposed a device that automatically opens circuits and disconnectors in the event of undervoltage.

In this case, the actuator 26 of the limit switch S, which is a micro switch, is pushed by the actuating rod 4a directly attached to the movable core 4 of the first solenoid electromagnet 1, and the micro switch S is opened, and the electromagnetic coil 3 is no longer energized. It stops and reduces power consumption to 0, but since it works with the instantaneous movement of the movable core 4 of the first solenoid electromagnet 1, it is necessary to finely adjust the timing with the limit switch S if the shock of this electromagnet is large. If the position of the solenoid electromagnet 1 is twisted or worn due to some reason, causing play, a flapping phenomenon will occur in the first solenoid electromagnet 1, and the contacts 9 and 10 of the circuit and disconnector B will
The result was that the wear and tear of the engine was rapid and had a negative effect on the load, which was unfortunate. This is because the limit switch S opens and the suction of the first solenoid electromagnet 1 disappears at the same time as the hook of the claw that serves as a stopper does not coincide with the timing.

Reference numeral 16 denotes a hook that engages with the pawl 4b when the first solenoid electromagnet 1 is not energized, and serves as a stopper to prevent the operation plate 5 from moving left and right, and is engaged when the second tripping electromagnet 19 is energized. Disconnected contacts 9, 10
is open. Reference numeral 29 is a normally open push button switch that is closed only when the tripping electromagnet 19 is activated.

Taking these points into consideration, in this proposal, a mechanical delay device such as an air damper is provided between the limit switch and the operation plate that moves together with the movable iron core of the first solenoid electromagnet 1. The limit switch is opened when the electromagnet has been reliably inserted, the vibration and reaction of the first solenoid electromagnet have disappeared, and the claws have been completely engaged, thereby preventing the flapping phenomenon.

An embodiment of the present device will be described with reference to FIGS. 1 and 2, which are schematic diagrams showing different operating states and circuit connections, and FIG. 3, which is an enlarged perspective view of an air damper.

The same reference numerals will be used for parts corresponding to Figure 4 in this proposal as well. Although not shown, each component is assumed to be attached to a base. In the figure, reference numeral 1 denotes a first solenoid electromagnet, which is fixed to a base and consists of a fixed iron core 2 around which an electromagnetic coil 3 is wound, and a movable iron core 4. An operation plate 5 is integrated on the left side of the movable iron core 4. It is connected so that it can move like this, and moves left and right following the movable iron core 4. In addition, B schematically shows a contact opening/closing part represented by contacts 9 and 10 of a circuit breaker and disconnector, and there is a movable contact rod 8 with contact 1 at its tip
0 is attached, and the opposite end is rotatably mounted on a shaft 7 on a bearing 6 fixed to the base, and the movable contact rod 8 has an oval hole 11 provided in the middle and a pin 12 planted in the operation plate 5. The contacts 9 and 10 are engaged with each other and are rotatable following the left and right movement of the operation plate 5, so that the contacts 9 and 10 are opened and closed. The left end of the operation plate 5 is biased to the left by a spring 13, and when the first solenoid electromagnet 1 loses its magnetic force, the movable iron core 4 is pulled back to the left in the drawing, and the contacts 9 and 10 are closed as shown in FIG. is in an open circuit structure. In addition, the hook 16 made of magnetic material is 1
5, and is biased counterclockwise by a push spring 17 at the other end, and when the solenoid electromagnet 1 is not energized, the claw 18 of the claw 18 and the claw 14 provided on the operating plate 5 engage with each other, and the operating plate 5 It acts as a stopper to prevent left and right movement. Reference numeral 19 is a second tripping electromagnet which, when excited, attracts the hook 16 and connects the claws 18 and 14.
is disengaged, the operating plate 5 moves to the left by the force of the spring 13, and the contacts 9 and 10 are opened, resulting in the state shown in FIG. S is a limit switch, and when the first solenoid electromagnet 1 is attracted, the contacts 9 and 10 of B are closed, and the claws 14 and 18 have finished engaging, the micro switch S is opened, and the first solenoid electromagnet 1 is closed. Reduce power consumption to zero. Further, the present invention has a structure in which the limit switch S is opened a little later than the operation plate 5 via the air damper 20 attached to the base. The air damper 20 has a compression spring 22 at the bottom of a bottomed cylinder 21, and is connected to an actuator 26 of a limit switch S by a pin 25 provided in a rod 24 of a piston 23, which is biased to the right in the figure. The head 27 of the rotor 24 is in contact with the protrusion 28 of the operation plate 5, and the head 27 follows the movement of the operation plate 5 to the right with a little delay, and the limit switch S
opens. When the piston 23 of the air damper 20 compresses the spring 22 to the left, it opens the valve without air resistance, and conversely, when it moves to the right, it closes the valve to provide a necessary time delay. It is designed to have air resistance of .

Next, to explain the operation of the present device, when turning on the circuit or disconnector B by remote operation as shown in Figure 2, when the normally open push button switch SW-1 is turned on, the control power terminal W-switch SW-1-1 1 solenoid electromagnet 1 coil terminal L ₂ - electromagnetic coil 3 - coil terminal
A circuit of L ₁ - limit switch S - control power supply terminal V is configured, the first solenoid electromagnet 1 is energized, the movable iron core 4 is attracted, and at the same time the operation plate 5 is instantaneously moved to the right, and the spring 17 moves it counterclockwise. When the claw 18 of the hook 16, which is biased in the opposite direction, engages with the claw 14 of the operation plate 5, the state shown in FIG. 1 is reached. At this point, the air damper 20 has not returned completely due to the delay time, and therefore the limit switch S does not operate to open the circuit, so the first solenoid electromagnet 1
The suction continues, but after a certain time delay, the nail 1
After 4 and 18 are securely engaged, the piston rod 2
4 gradually returns, the pin 25 of the rotor 24 pushes the actuator 26 of the switch S to the right, the limit switch S is opened, and the first solenoid electromagnet 1 is de-energized.

As described above, the present invention opens the limit switch when the first solenoid electromagnet 1 is securely closed, the vibration and reaction of the first solenoid electromagnet 1 disappear, and the pawls 14 and 18 are completely engaged, so that the limit switch is opened. No phenomena occur.

Next, when opening the circuit or disconnector B, press the normally open push button switch SW-2 to close the circuit. The circuit is configured,
The second tripping electromagnet 19 is energized and the hook 1
6 is attracted, the claws 14 and 18 are disengaged, the operation plate 5 biased to the left by the spring 13 is moved, the contacts 9 and 10 are opened, and the circuit connecting the terminals R ₁ and R ₂ is closed. It is then cut off, resulting in the state shown in Figure 2. FIG. 3 shows a partially sectional perspective view of the air damper 20, which uses the same principle as a bicycle air pump to connect the piston 23 to the
It is made of shaped leather or neoprene, and as mentioned above, when it moves to the left, air leaks from the edge of the U-shaped piston, so there is no air resistance, but when it moves to the right, the edge tries to widen, creating a vacuum phenomenon, so there is a lot of resistance. The structure is such that a delay time occurs.

Although the present invention has been described using an air damper as an example, an oil damper or other mechanical delay device may also be used.

[Brief explanation of the drawing]

1 and 2 are schematic diagrams showing different operating states and circuit connections of the present invention, and FIG. 3 is an enlarged perspective view of the air damper. Also, FIG. 4 shows the circuit breaking device proposed previously. In the figure, 1 is the first solenoid electromagnet, 2 is the fixed core, 3 is the electromagnetic coil, 4 is the movable core, 5 is the operation plate, 6 is the bearing, 7 is the shaft frame, 8 is the movable contact rod, 9,
10 is a contact, 11 is an oval hole, 12 is a pin, 13 is a spring, 14 is a claw, 15 is a shaft, 16 is a hook,
17 is a spring, 18 is a claw, 19 is a second tripping electromagnet, 20 is an air damper, 22 is a compression spring, 23
is a piston, 24 is a rod, 25 is a pin, 26 is an actuator, B is a circuit breaker, and S is a limit switch.

Claims (1)

[Scope of utility model registration request] It plays a main role in opening and closing, and when the movable core 4 is attracted and excited, the circuit breaker B is closed and connected by the mechanical engagement between the operation plate 5 that moves together with the movable core 4 and the movable contact rod 8. When the first solenoid electromagnet 1, the second tripping electromagnet 19 that only releases the closing connection, and the movable iron core 4 are attracted, the first solenoid electromagnet 1 is energized by the movement of the operation plate 5. This is a circuit disconnection device that combines a limit switch S that opens the circuit so as to disconnect the circuit, and a mechanical delay device 20 such as an air damper is provided between the operation plate 5 and the limit switch S. Electromagnetic operating device for disconnection.