JP2598748Y2 - Crusher power supply - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for detecting a bite during operation of a crusher for crushing bulky waste, for example.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional structure, in which the motor 3
The circuit breaker 2 is turned off by the overcurrent detection of the overcurrent detector 1 in the power supply line of (1) to protect the motor 3 and the crusher 6. In the figure, reference numeral 4 denotes a rotation speed detector.

[0003]

[Problem to be Solved by the Invention] When an overload occurs during the operation of the crusher 6 and the overcurrent detector 1 cuts off the line by the breaker 2 to protect the crusher 6 body,
Since it is considered that the inside of the crusher 6 is involved, the crusher 6 is restarted after checking the inside. In this case, the circuit breaker 2 is re-established even if biting has not occurred.
It takes a long time to turn on.

An object of the present invention is to provide a power supply device for a crusher which is automatically restarted when no biting occurs.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an overcurrent detector for a power line of a motor for driving a crusher, a circuit breaker for turning on and off the power line, and a rotation of the motor. the number detector, after Tsu switching the breaker at the overcurrent detection by the overcurrent detector, the rotational speed detector
The rotation speed of the motor detected by
When the speed drops from the speed at the time of cutting to the specified speed
Time, and when this elapsed time is greater than the set time,
And an automatic bite detector for controlling the circuit breaker to turn on the circuit breaker.

[0006]

[Effect] Even if the circuit breaker operates due to overload, if the overload state is removed by the subsequent rotation speed, there is no problem even if the restart is performed. Therefore, in the case where the rotational speed after the cutoff by the circuit breaker is not measured, the restart command is given.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to FIGS. In FIG. 1, 1 is an overcurrent detector for detecting overcurrent in a power line, 2 is a circuit breaker for turning on / off the power line, 3 is a motor connected to the power line and driving the crusher, 4 is a rotation of the motor 3 The number detector 6 is a crusher for oversized garbage.

Reference numeral 5 denotes an automatic bite detector. The detector 5 determines whether the crushed material has caught in the crusher 6 due to an overcurrent.
To give a restart. The automatic bite detector 5 will be described in more detail with reference to FIG. 2. The threshold detector 7 monitors the value of the current flowing through the crusher motor 3 and detects a current equal to or higher than the set value H.
This outputs a disconnect command. The timer 8 obtains the elapsed time T from the rotation speed H to the rotation speed L at the time of outputting the cutoff command. The decision circuit 9,-out <br/> the elapsed time T is larger than the set time x, which outputs an ON command to the breaker 2. Small T is from x to reverse
At this time, a biting occurrence alarm is output.

FIG. 3 is a flowchart showing the operation of the automatic bite detector 5. When the current value is equal to or higher than the set value H, the time is measured and a disconnection command for the circuit breaker 2 is output after the elapse of Y time. Then, the rotation speed drop from H to L is calculated and X time
To complete the re-start at the circuit breaker input directive in the other, X time or more
Inside , a biting detection alarm is output.

[0010]

[Effect of the Invention] In the conventional method, when the crusher motor stops due to overload during the operation of the crusher, it is necessary for the operator to check whether the crushed material is caught in the crusher.
Although it took time until the crusher motor was restarted, the processing time until restarting can be reduced by using an automatic bite detector.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram of an automatic bite detector.

FIG. 3 is a calculation flowchart of FIG. 2;

FIG. 4 is a configuration diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Overcurrent detector 2 Breaker 3 Motor 4 Speed detector 5 Automatic bite detector 6 Crusher

Claims (1)

(57) [Scope of request for utility model registration] 1. An overcurrent detector for a power line of a motor for driving a crusher, a circuit breaker for turning on / off the power line, a rotation speed detector for the motor, and an overcurrent by the overcurrent detector. after Tsu switching <br/> the breaker at the detection, the motor detected by the rotational speed detector
From the number of rotations when the circuit breaker was turned off.
Obtain the elapsed time that decreases to the constant speed, and calculate the elapsed time
If it is longer than the set time, turn on the breaker
A detector biting automatically controlling the so that the circuit breaker,
A power supply device for a crusher, comprising: