CN-224212296-U - Control system under door machine

CN224212296UCN 224212296 UCN224212296 UCN 224212296UCN-224212296-U

Abstract

The present disclosure provides a door machine under-machine control system. The control system under the door machine comprises a control box, wherein a plurality of paths of control signal input circuits are arranged in the control box, one path of control signal input circuits comprises a change-over switch SA1, the first end and the second end of the change-over switch SA1 are grounded, the fourth end of the change-over switch SA1 is connected with a first power supply through a pull-up resistor, the fourth end of the change-over switch SA1 is connected with the first signal input end of an on-machine controller, and the on-machine controller is configured to control the door machine to work. The door machine control system can solve the problem that the existing door machine control is time-consuming and labor-consuming.

Inventors

FU XING
MENG WEIWEI
CHAI XUE
LIU JIANGLEI
ZHANG YONGXIANG
CAO JIANGUO
HAN ZIHAO
Huo Yinzhuang
JIA WENBO
Zeng Xiangchen

Assignees

曹妃甸港集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250526

Claims (8)

1. The under-door machine control system is characterized by comprising a control box, wherein a plurality of control signal input circuits are arranged in the control box, one path of control signal input circuits comprises a change-over switch SA1, the first end and the second end of the change-over switch SA1 are grounded, the fourth end of the change-over switch SA1 is connected with a first power supply through a pull-up resistor, The fourth terminal of the switch SA1 is connected to a first signal input terminal of an on-board controller, and the on-board controller is configured to control the door machine to work.
2. The under-door machine control system of claim 1, further comprising an RS trigger, The fourth end of the switch SA1 is connected with the reset input end of the RS trigger, the third end of the switch SA1 is connected with the set input end of the RS trigger, and the output end of the RS trigger is connected with the signal input end of the on-board controller.
3. The under-door machine control system according to claim 1, further comprising an electric shock prevention circuit including a voltage acquisition circuit, a switching tube Q1, a potentiometer RP1, a thyristor SCR and a contactor K1, The voltage acquisition circuit is configured to detect the voltage between the casing of the control box and the ground, the control end of the switching tube Q1 is connected with the output end of the voltage acquisition circuit, the first end of the switching tube Q1 is connected with a first power supply through a potentiometer RP1, the second end of the switching tube Q1 is grounded, The first end of the switch tube Q1 is connected with the control end of the thyristor SCR, the anode of the thyristor SCR is connected with one end of the coil of the contactor K1, the other end of the coil of the contactor K1 is connected with a second power supply, the cathode of the thyristor SCR is grounded, The normally open contact of the contactor K1 is connected in series in a power supply line of the control box.
4. An under-door machine control system as claimed in claim 3, wherein said voltage acquisition circuit comprises a resistor R17 and a resistor R18, The first end of the resistor R17 is connected with the shell of the control box, the second end of the resistor R17 is grounded through a resistor R18, and the second end of the resistor R17 is the output end of the voltage acquisition circuit.
5. The under-door machine control system according to claim 3, further comprising an alarm circuit, wherein the alarm circuit comprises a switch tube Q3, a resistor R12, an oscillating circuit, a switch tube Q2 and a loudspeaker, the control end of the switch tube Q3 is connected with the first end of the switch tube Q1, the first end of the switch tube Q3 is connected with a first power supply through the resistor R12, the second end of the switch tube Q3 is grounded, the first end of the switch tube Q3 is connected with the control end of the oscillating circuit, The output end of the oscillating circuit is connected to the control end of the switching tube Q2, the first end of the switching tube Q2 is connected with the first power supply end of the loudspeaker, the second power supply end of the loudspeaker is connected with the first power supply, and the second end of the switching tube Q2 is grounded.
6. The under-door machine control system according to claim 5, wherein the oscillating circuit comprises a time-base chip U4, a resistor R7, a resistor R8 and a capacitor C1, The first end of the resistor R8 is connected with a first power supply, the second end of the resistor R8 is connected with the first end of the capacitor C1 through the resistor R7, the second end of the capacitor C1 is grounded, The second end of the resistor R8 is connected with the discharge end of the time base chip U4, the first end of the capacitor C1 is connected with the threshold input end and the trigger input end of the time base chip U4, The reset end of the time base chip U4 is the control end of the oscillating circuit, and the output end of the time base chip U4 is the output end of the oscillating circuit.
7. The under-door machine control system of claim 1, further comprising: And the surge protector is arranged at the power supply input end of the control box and is configured to introduce an overcurrent signal of lightning strike to the ground.
8. The under-door machine control system of claim 1, further comprising: An arc detection circuit configured to detect an arc signal within the control box.

Description

Control system under door machine Technical Field The disclosure relates to the field of automatic control technology, and in particular to a door machine under-machine control system. Background Portal cranes are used for loading and unloading containers, bulk goods, and sundry goods in port operations. When the door operator walks under the machine, the main contactor is closed in the door operator cab, and the rotary switch is rotated to the 'walking under the machine' stop. The whole process needs to go up and down the door machine, carries out the relevant operations such as closing the main contactor, selecting the walking control gear, and the like, consumes more time, and limits the timeliness of the door machine movement, so that the door machine is windproof and has low ship avoiding efficiency. Disclosure of utility model The embodiment of the disclosure provides a door machine under-machine control system, which aims to solve the problem that the existing door machine under-machine control is time-consuming and labor-consuming. The embodiment of the disclosure provides a control system under a door machine, which comprises a control box, wherein a plurality of paths of control signal input circuits are arranged in the control box, one path of control signal input circuits comprises a change-over switch SA1, a first end and a second end of the change-over switch SA1 are grounded, a fourth end of the change-over switch SA1 is connected with a first power supply through a pull-up resistor, The fourth terminal of the switch SA1 is connected to a first signal input terminal of an on-board controller, and the on-board controller is configured to control the door machine to work. In one exemplary embodiment of the present disclosure, the under-door machine control system further includes an RS trigger, The fourth end of the switch SA1 is connected with the reset input end of the RS trigger, the third end of the switch SA1 is connected with the set input end of the RS trigger, and the output end of the RS trigger is connected with the signal input end of the on-board controller. In one exemplary embodiment of the present disclosure, the under-door machine control system further includes an anti-shock circuit including a voltage acquisition circuit, a switching tube Q1, a potentiometer RP1, a thyristor SCR and a contactor K1, The voltage acquisition circuit is configured to detect the voltage between the casing of the control box and the ground, the control end of the switching tube Q1 is connected with the output end of the voltage acquisition circuit, the first end of the switching tube Q1 is connected with a first power supply through a potentiometer RP1, the second end of the switching tube Q1 is grounded, The first end of the switch tube Q1 is connected with the control end of the thyristor SCR, the anode of the thyristor SCR is connected with one end of the coil of the contactor K1, the other end of the coil of the contactor K1 is connected with a second power supply, the cathode of the thyristor SCR is grounded, The normally open contact of the contactor K1 is connected in series in a power supply line of the control box. In one exemplary embodiment of the present disclosure, the voltage acquisition circuit includes a resistor R17 and a resistor R18, The first end of the resistor R17 is connected with the shell of the control box, the second end of the resistor R17 is grounded through a resistor R18, and the second end of the resistor R17 is the output end of the voltage acquisition circuit. In an exemplary embodiment of the disclosure, the under-door-machine control system further includes an alarm circuit, where the alarm circuit includes a switching tube Q3, a resistor R12, an oscillating circuit, a switching tube Q2, and a speaker, a control end of the switching tube Q3 is connected to a first end of the switching tube Q1, a first end of the switching tube Q3 is connected to a first power supply through the resistor R12, a second end of the switching tube Q3 is grounded, a first end of the switching tube Q3 is connected to a control end of the oscillating circuit, The output end of the oscillating circuit is connected to the control end of the switching tube Q2, the first end of the switching tube Q2 is connected with the first power supply end of the loudspeaker, the second power supply end of the loudspeaker is connected with the first power supply, and the second end of the switching tube Q2 is grounded. In one exemplary embodiment of the present disclosure, the oscillating circuit includes a time-base chip U4, a resistor R7, a resistor R8 and a capacitor C1, The first end of the resistor R8 is connected with a first power supply, the second end of the resistor R8 is connected with the first end of the capacitor C1 through the resistor R7, the second end of the capacitor C1 is grounded, The second end of the resistor R8 is connected with the discharge end of the time base chip U4, the first