WO2008145022A1

WO2008145022A1 - A control system for overhead traeling crane to stack carbon blocks and a control method for the same

Info

Publication number: WO2008145022A1
Application number: PCT/CN2008/001052
Authority: WO
Inventors: Zhongyu Qi; Mingxun Fang; Linhua Wang
Original assignee: China Aluminum International Engineering Corporation Limited
Priority date: 2007-05-29
Filing date: 2008-05-29
Publication date: 2008-12-04
Also published as: SA08290330B1; CN101058391A

Abstract

A control system and a control method for an overhead traveling crane to stack carbon blocks, include a PLC controller, several switches (1-11) for collecting signals, execution elements consisting of an electromagnet (7), an electric bottle (12), a lifting motor (17) and a traveling motor (2). The PLC controller receives the input signals from the switches, and then sends the directions to the execution elements. The chain action of the control system and method for the overhead traveling crane increases the automatic control scope, and avoid errors made by operators,

Description

Control system and control method for carbon block stacking crane

The invention relates to a carbon block stacking crane, in particular to a control system and a control method for a carbon block stacking crane.

Background technique

With the rapid development of the aluminum industry, the demand for large-scale prebaked anodes is also increasing. The anode warehouse of large-scale electrolytic aluminum plants is also rapidly increasing to meet the needs of production development. The productivity of carbon block stacking cranes has been clamped once. One carbon block develops to clamp 18 to 22 carbon blocks at a time, and requires the crane to run fast. This requires the crane operator to concentrate on avoiding misoperations. It is inevitable that the misuse will be inevitable from the current usage. of.

Summary of the invention

The invention is a control system and a control method for a carbon block stacking crane provided to solve the above problems, the purpose of which is to interlock the action of the carbon block stacking crane, increase the scope of automatic control, and reduce the operator's Labor intensity, improve work efficiency, and make operations and systems safer.

In order to solve the above technical problems, the present invention is realized as follows: The control system of the carbon block stacking crane is constructed as follows:

The first switch and the seventh switch are used to send the clamp group running position signal to the PLC controller, so that the PLC controller can control the running speed of the clamp group or stop the clamp; the third switch and the fourth switch are used to give the PLC controller Sending the rotary hook running position signal, so that the PLC controller controls the lifting motor to be energized; the No. 9 switch is used to send the PLC controller to send the clamp group at the uppermost position signal, so that the PLC controller controls the lifting motor to be powered off; , for receiving signals of each switch input, and issuing control commands to the respective actuators, wherein the actuators are electromagnets, lifting motors and traveling motors, and the output ends of the switches are connected with the input ends of the PLC controller, the PLC controller The output is connected to the actuator.

The actuator further includes an electric hoist.

The first switch, the third switch, the fourth switch, the seventh switch and the nine switch are one or a combination of an inductive proximity switch, a photoelectric open switch or a mechanical travel switch.

The first switch is mounted on the clamp beam.

The third switch and the fourth switch are mounted on the clamp frame. The seventh switch is mounted on the upper side of the main beam.

The No. 9 switch is mounted on the underside of the main beam.

The control system of the carbon block stacking crane further comprises 2-6 fifth switches for sending a position signal of the crane running at both ends of the plant to the PLC controller, so that the PLC controller controls the running motor to be powered off.

The fifth switch is installed at both ends of the end beam.

The fifth switch is an inductive proximity switch, a photoelectric open switch or a mechanical travel switch. The control system of the carbon block stacking crane also includes a sixth switch and an eleventh switch for transmitting a position signal of the electric hoist at both ends to the PLC controller, and the PLC controller controls the electric hoist to be powered off.

The sixth switch and the eleventh switch are mounted on the running rail of the lower electric hoist of the main beam.

The sixth switch and the eleventh switch are any one of an inductive proximity switch, a photoelectric open switch, or a mechanical travel switch.

The control system of the carbon block stacking crane further comprises a switch No. 8 for sending the PLC controller to send the clamp group to descend or the rising speed is too fast, that is, the lifting motor exceeds the set speed signal.

The eighth switch is mounted on the output shaft of the tail end of the hoist motor.

The eighth switch can also be mounted inside the crane motor.

The eighth switch is an overspeed switch.

The control system of the carbon block stacking crane also includes a switch No. 10 for sending the No. 9 switch to the PLC controller, the hoisting motor is still running, and exceeds the set number of revolution signals.

The ten switch is mounted on the reel.

The tenth switch is an inductive proximity switch, a photoelectric open switch or a mechanical travel switch. The tenth switch can also be an automatic cycle stroke or a program control switch.

The control method of the carbon block stacking crane, which comprises the following process steps:

The first switch and the seventh switch detect the operation position signal of the clamp group, and send the detected signal to the PLC controller. The PLC controller receives the signal and issues a control command to control the running speed of the clamp group or stop the clamp; the third switch And the fourth switch detects the running position signal of the rotary hook, and sends the detected signal to the PLC controller. After receiving the signal, the PLC controller issues a control command to control the lifting motor to be energized; the No. 9 switch detecting fixture group is The signal at the uppermost position sends the detected signal to the PLC controller. After receiving the signal, the PLC controller issues a control command to de-energize the hoist motor.

The control method of the carbon block stacking crane further comprises the following steps: when the fifth switch detects that the traveling motor runs to the end of the workshop, the signal is sent to the PLC controller, and the PLC controller receives the signal and sends out The control command de-energizes the travel motor.

The control method of the carbon block stacking crane further comprises the following steps: The No. 10 switch detects that the No. 9 switch is malfunctioning, the lifting motor is still running, and the signal is sent to the PLC after exceeding the set number of revolution signals. The controller, after receiving the signal, the PLC controller issues a control command to de-energize the hoist motor and the fixture set is stationary.

The control method of the carbon block stacking crane further comprises the following steps: the sixth switch and the eleventh switch detect the position signal of the electric hoist at both ends and send the signal to the PLC controller, and the PLC controller receives the After the signal, a control command is issued to the electric hoist to power off the electric hoist.

The control method of the carbon block stacking crane further comprises the following steps: The eighth switch detects that the clamp group is falling or the rising speed is too fast, that is, the lifting motor exceeds the set speed signal and sends the signal to the PLC controller. After receiving the signal, the PLC controller issues a control command to the hoist motor to decelerate the hoist motor.

The control method of the carbon block stacking crane further comprises the following steps: the No. 9 switch or the No. 10 switch does not send a signal to the PLC controller, and the traveling motor is in a "locked" state.

The No. 9 switch or the No. 10 switch does not send a signal to the PLC controller and the No. 4 switch does not send the signal to the PLC controller. The electric hoist is in the "locked" state.

Advantages and effects of the present invention:

The interlocking action of the carbon block stacking crane increases the scope of automatic control, reduces the labor intensity of the operator, improves the work efficiency, and makes the operation and the system more secure. The invention avoids equipment and personal accidents caused by irregular operation, and increases secondary protection measures from the perspective of safety.

DRAWINGS

Fig. 1 is a schematic view showing the state of the carbon block stacking crane when the clamp contact is just in contact with the carbon block. Figure 2 is a schematic view showing the structure of the carbon block stacking crane when the clamp is lowered into position.

Fig. 3 is a schematic view showing the structure of the carbon block stacking crane when the electromagnet is powered off.

Fig. 4 is a schematic view showing the state of the carbon block stacking crane when the clamp frame is lifted.

Fig. 5 is a schematic view showing the structure of a carbon block stacking crane. Figure 6 is a block diagram showing the structure of the carbon block stacking crane control system.

1. No. 1 switch; 2. Travel motor; 3. Fixture frame; 4. Spring; 5. No. 3 switch; 6. No. 4 switch; 7. Electromagnet; 8. Rotating hook; 9. Fixture contact; Fixture beam; 1 1. Switch No. 5; 12. Electric hoist; 13. No. 6 switch; 14. No. 7 switch; 15. Wire rope; 16. No. 8 switch; 17. Lifting motor; 18. No. 9 switch; Guide frame; 20. No. 10 switch; 21. No. 11 switch.

detailed description

The embodiments of the present invention are described in detail below with reference to the drawings, but the scope of the present invention is not limited by the embodiments.

As shown in Figure 1 and Figure 6, the control system of the carbon block stacking crane is as follows: No. 1 switch 1 and No. 7 switch 14 are used to send the clamp group running position signal to the PLC controller, so that the PLC controller Control the running speed of the clamp group or stop the clamp, the first switch 1 is mounted on the clamp beam 10, the seventh switch 14 is mounted on the upper side of the main beam; the third switch 5 and the fourth switch 6 are used to send to the PLC controller Rotating the hook 8 to run the position signal, so that the PLC controller controls the lifting motor 17 to be energized, the third switch 5 and the fourth switch 6 are mounted on the clamp frame 3; the 9th switch 18 is used to send the clamp set to the PLC controller at the most The upper position signal causes the PLC controller to control the hoist motor 17 to be powered off, and the No. 9 switch 18 is mounted on the lower side of the main beam; the PLC controller is configured to receive signals input by the switches and issue control to each of the actuators, The actuators are electromagnet 7, lifting motor 17, electric hoist 12 and travel motor 2. The output of each switch is connected to the input of the PLC controller, and the output and execution of the PLC controller Piece connection.

The above control system of the carbon block stacking crane also includes 2-6 fifth switches 1 1 for sending a position signal of the crane running to both ends of the plant to the PLC controller, so that the PLC controller controls the running motor 2 to be powered off. The fifth switch 1 1 is installed at both ends of the end beam.

The above control system of the carbon block stacking crane also includes a sixth switch 13 and an eleventh switch 21 for transmitting a position signal of the electric hoist 12 at both ends to the PLC controller, and the PLC controller controls the electric hoist 12 to be powered off. The sixth switch 13 and the eleventh switch 21 are mounted on the running rail of the lower electric hoist 12 of the main beam.

The above control system of the carbon block stacking crane also includes an eighth switch 16, which is used for sending the clamp to the PLC controller to raise or lower the speed too fast, that is, the lifting motor 17 exceeds the set speed signal, and the eighth switch 16 is installed. On the output shaft of the tail end of the crane motor 17, or inside the crane motor, the eighth switch 16 is an overspeed switch. The above-mentioned control system of the carbon block stacking crane also includes a switch No. 10 for sending the No. 9 switch 18 to the PLC controller, the lifting motor 17 is still running, and exceeds the set number of revolution signals, No. 10 The switch 20 is mounted on a reel, and the tenth switch 20 can be an automatic cycle stroke or a program control switch.

The above-mentioned No. 1 switch 1, No. 3 switch 5, No. 4 switch 6, No. 5 switch 1 1 , No. 6 switch 13, No. 7 switch 14, No. 9 switch 18, No. 10 switch 20 and No. 11 switch 21 can be selected. Any of inductive proximity switches, photoelectric opening or mechanical travel switches.

The control method of the carbon block stacking crane is as follows:

Original position: The clamp group is at the top, the clamp is open, the electromagnet 7 is energized, and the spring 4 is stretched.

Clamping the carbon block: The running motor 2 runs, stops at the position of the carbon block, and if it runs to the end of the workshop, the fifth switch sends this signal to the PLC controller, and the PLC controller receives the signal and issues control. The command causes the traveling motor 2 to be powered off. If the fifth switch 1 1 fails, the buffer device of the end beam hits the end of the workshop to buffer the impact force; the lifting motor 17 is energized, and the clamp group drops rapidly. When the clamp contact just touches the carbon block (Fig. 1), the first switch sends the detected signal to the PLC controller. The PLC controller receives the signal and issues a control command to control the clamp group to decelerate and descend, when the clamp is lowered into position. The seventh switch 14 detects the running position signal of the clamp group, and sends the detected signal to the PLC controller. The PLC controller receives the signal and issues a control command to power off the lifting motor 17, and the clamp group is stationary;

The electromagnet 7 is de-energized, the spring 4 is pulled, the third switch 5 detects the running position signal of the rotary hook 8, and sends the detected signal to the PLC controller, and the PLC controller receives the signal and issues a control command to control the lifting motor. 17 energized, the fixture group rises;

When the clamp group rises to a certain height, the No. 9 switch 18 detects the signal of the clamp group at the uppermost position, and sends the detected signal to the PLC controller. After receiving the signal, the PLC controller issues a control command to cause the crane motor 17 to be disconnected. Electric, the clamp group is stationary. If the No. 9 switch 18 fails, that is, the lifting motor 17 is still running, but exceeds the set number of revolutions, the No. 10 switch 20 detects this signal and sends the detected signal to the PLC controller. After receiving the signal, the PLC controller issues a control command to control the lifting motor 17 to be powered off, and the fixture set is stationary;

Charging block: The running motor 2 runs, stops after the operation is in place, the lifting motor 17 is energized, the clamp group is lowered, and after the clamp group is lowered into position, the lifting motor 17 is de-energized, and the clamp unit is stationary. If the clamp group rises or falls too fast, that is, the lifting motor 17 exceeds the set speed, then the number 8 The switch 16 detects the signal and sends the detected signal to the PLC controller. After receiving the signal, the PLC controller issues a control command to control the lifting motor 17 to decelerate;

When the clamp is lowered into position, the seventh switch 14 detects the running position signal of the clamp group, and sends the detected signal to the PLC controller, and the PLC controller receives the signal and issues a control command to power off the lifting motor 17, the fixture Group is stationary;

The electromagnet 7 is energized, the fourth switch 6 detects the running position signal of the rotary hook 8, and sends the detected signal to the PLC controller. After receiving the signal, the PLC controller issues a control command to control the command, and the lifting motor 17 is energized. , the fixture group rises and returns to the original position.

The electric hoist 12 works, if it runs to the leftmost or rightmost end (this is not allowed in operation), then the sixth switch 13 or the eleventh switch 21 detects this signal, and sends the detected signal to the PLC controller, PLC control After receiving this signal, the controller issues a control command to control the electric hoist 12 "locked".

Safety interlock: If the No. 9 switch 18 or the No. 10 switch 20 does not issue a command, the travel motor 2 is in the "locked" state. If the No. 9 switch 18 or the No. 10 switch 20 does not issue a command and the No. 4 switch 6 does not issue a command, the electric hoist 12 is in the "locked" state.

Claims

Rights request

1. The control system of the carbon block stacking crane, its structure is:

The first switch (1) and the seventh switch (14) are used to send the clamp group 5 running position signal to the PLC controller, so that the PLC controller can control the running speed of the clamp group or stop the clamp; the third switch (5) and The fourth switch (6) is used to send a rotary hook (8) running position signal to the PLC controller, so that the PLC controller controls the lifting motor (17) to be energized;

The No. 9 switch (18) is used to send the PLC controller the signal of the clamp group at the uppermost position, so that the PLC controller controls the hoist motor (17) to be powered off;

0 PLC controller, used to receive the signals input by each switch, and send control commands to the various actuators, wherein the actuators are electromagnet (7), lifting motor (17) and travel motor (2), the output of each switch The terminal is connected to the input of the PLC controller, and the output of the PLC controller is connected to the actuator.

2. The control system of a carbon block stacking crane according to claim 1, wherein the actuator further comprises an electric hoist (12).

3. The control system of a carbon block stacking crane according to claim 1, characterized in that the first switch (1), the third switch (5), the fourth switch (6), and the seventh switch ( 14) and the 9th switch (18) are one or a combination of an inductive proximity switch, a photoelectric open switch or a mechanical travel switch.

The control system for a carbon block stacking crane according to claim 1, characterized in that the first switch (1) is mounted on the clamp beam (10).

The control system for a carbon block stacking crane according to claim 1, characterized in that the third switch (5) and the fourth switch (6) are mounted on the clamp frame (3).

6. The control system of a carbon block stacking crane according to claim 1, wherein the seventh switch (14) is mounted on the upper side of the main beam.

7. The control system of a carbon block stacking crane according to claim 1, wherein said No. 9 switch (18) is mounted on a lower side of the main beam.

8. The control system of a carbon block stacking crane according to claim 1, further comprising 2-6 switch No. 5 (11) for sending a crane to the PLC controller to run at 0 factory two The position signal of the terminal causes the PLC controller to control the travel motor (2) to be powered off.

9. The control system of a carbon block stacking crane according to claim 8, wherein the number of the fifth switch (11) is 2-6, and is installed at both ends of the end beam.

10. The control system of a carbon block stacking crane according to claim 8 or 9, wherein the fifth switch (11) is an inductive proximity switch, a photoelectric opening or a mechanical travel switch.

11. The control system of a carbon block stacking crane according to claim 1, further comprising a sixth switch (13) and an eleventh switch (21) for transmitting the electric hoist to the PLC controller ( 12) The position signal at both ends, the PLC controller controls the electric hoist (12) to be powered off.

12. The control system of a carbon block stacking crane according to claim 11, wherein the sixth switch (13) and the eleventh switch (21) are mounted on the lower side electric hoist of the main beam (12) ) on the running track.

13. The control system of a carbon block stacking crane according to claim 11 or 12, wherein the sixth switch (13) and the eleventh switch (21) are inductive proximity switches, photoelectric opening or Any of the mechanical travel switches.

14. The control system of a carbon block stacking crane according to claim 1, further comprising a switch No. 8 (16) for sending a clamp to the PLC controller to lower or ascend the speed too fast to lift The motor ( 17) exceeds the set speed signal.

15. The control system of a carbon block stacking crane according to claim 14, wherein said eighth switch (16) is mounted on a tail end output shaft of the hoist motor (17).

16. The control system of a carbon block stacking crane according to claim 14, wherein said eighth switch is mounted inside the crane motor.

17. A control system for a carbon block stacking crane according to claim 14, 15 or 16, characterized in that said eighth switch (16) is an overspeed switch.

18. The control system of a carbon block stacking crane according to claim 1, further comprising a switch No. 10 (20) for transmitting a switch No. 9 to the PLC controller (18) malfunctioning, lifting motor (17) Still running and exceeding the set number of revolutions.

19. The control system of a carbon block stacking crane according to claim 18, wherein said ten switch (20) is mounted on the reel.

20. A control system for a carbon block stacking crane according to claim 18 or 19, wherein said switch (20) is an inductive proximity switch, a photoelectric open or a mechanical travel switch.

21. A control system for a carbon block stacking crane according to claim 18 or 19, wherein said switch No. 10 (20) is a control switch for an automatic cycle stroke or program.

22. The control method of the carbon block stacking crane, which comprises the following process steps:

The first switch (1) and the seventh switch (14) detect the operation position signal of the clamp group, and send the detected signal to the PLC controller, and the PLC controller receives the signal and issues a control command to control the running speed of the clamp group or The clamp stops; the third switch (5) and the fourth switch 5 (6) detect the running position signal of the rotary hook (8), and send the detected signal to the PLC controller, and the PLC controller receives the signal and issues a control command. Control the lifting motor (17) to be energized; the No. 9 switch (18) detects the signal of the clamp group at the uppermost position, and sends the detected signal to the PLC controller. After receiving the signal, the PLC controller issues a control command to lift the crane. The motor ( 17) is de-energized.

The control method of the carbon block stacking crane according to claim 22, further comprising the following steps: the fifth switch (11) detects the signal when the crane is running to the end of the workshop building. Sended to the PLC controller, the PLC controller receives this signal and issues a control command to de-energize the travel motor (2).

24. The method of controlling a carbon block stacking crane according to claim 22, characterized in that it further comprises the following steps: No. 10 switch (20) detects the failure of the No. 9 switch (18), the lifting motor ( 17) After running and exceeding the set number of revolutions, this signal is sent to the PLC controller. After receiving the signal, the PLC controller issues a control command to de-energize the crane motor (17) and the fixture group is stationary.

25. The method of controlling a carbon block stacking crane according to claim 22, characterized in that it further comprises the following steps: the sixth switch (13) and the eleventh switch (21) detect the electric hoist (12) After the position signal at both ends, the signal is sent to the PLC controller. After receiving the signal, the PLC controller sends a control command to the electric hoist (12) to de-energize the electric hoist (12).

26. The method of controlling a carbon block stacking crane according to claim 22, characterized in that it further comprises the following steps: The eighth switch (16) detects that the clamp group is falling or rising too fast, that is, the lifting motor (17) After the set speed signal is exceeded, the signal is sent to the PLC controller. After receiving the signal, the PLC controller sends a control command to the lifting motor (17) to decelerate the lifting motor (17).

27. The method of controlling a carbon block stacking crane according to claim 22, characterized in that it further comprises the following steps: said No. 9 switch or No. 10 switch is not sent to the PLC controller: signal, walking The motor is in the "locked" state.

,

28. The method of controlling a carbon block stacking crane according to claim 22, wherein It also includes the following steps: The No. 9 switch or the No. 10 switch does not send a signal to the PLC controller and the No. 4 switch does not send a signal to the PLC controller that the electric hoist is in a "locked" state.