CN217656568U

CN217656568U - Control circuit for high-voltage main motor of multi-drive adhesive tape machine

Info

Publication number: CN217656568U
Application number: CN202221330381.6U
Authority: CN
Inventors: 王荣; 闫高峰; 何丽萍
Original assignee: Masteel Design & Research Institute Co ltd
Current assignee: Masteel Design & Research Institute Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-10-25
Anticipated expiration: 2032-05-30

Abstract

The utility model discloses a many drive sealing-tape machine high pressure main motor control circuit belongs to electrical and automated control technical field. The utility model comprises a PLC control unit and a sound-light alarm unit, wherein the signal end of the on-off position of each main motor high-voltage cabinet of the multi-drive adhesive tape machine is connected with the PLC control unit, the control end of the PLC control unit is connected with the on-off contact of each main motor high-voltage cabinet of the multi-drive adhesive tape machine, and the running state of each main motor of the adhesive tape machine is monitored and controlled; the control end of the PLC control unit is simultaneously connected with the sound and light alarm unit, and the sound and light alarm unit gives an alarm when the adhesive tape machine fails in operation. The utility model discloses control each high pressure drive host computer of sealing-tape machine, avoid causing the production accident by the operation of a host computer or partial host computer drive whole sealing-tape machine in process of production, greatly reduced open-air iron ore long distance transport sealing-tape machine operation fault rate.

Description

Control circuit for high-voltage main motor of multi-drive adhesive tape machine

Technical Field

The utility model relates to an electrical and automated control technical field, more specifically say, relate to a many drive sealing-tape machine high pressure main motor control circuit.

Background

With the increasing maturity of semi-continuous process of open-pit mining of metallurgical mines, the application of long-distance belt conveyor in stope ore and rock conveying system is increasingly common. According to the existing semi-continuous process, a long-distance adhesive tape machine is usually driven by two, three or even four high-voltage main motors, the power of the motors is mostly 200-400 kW, and the voltage grade is 6kV or 10kV. The high-voltage cabinets of the main motors of the rubber belt machines are generally arranged in a production line high distribution room in a centralized manner. Except special technological occasions, most of high-voltage main motors of the adhesive tape machines are directly started.

In the production practice, a certain drive fault sometimes occurs in the production process of the multi-drive adhesive tape machine with materials, so that the high-voltage cabinet comprehensive protection device trips, most post operators and operators on duty cannot find and process the fault in time, the rest main motors drive the whole adhesive tape machine to operate in a short time, the bearing is easily broken or the adhesive tape slips to cause fire, mechanical equipment is seriously damaged, long-time fault shutdown of the whole production line is caused, and great loss and great potential safety hazards are brought to production.

Through retrieval, aiming at the control problem of a multi-drive belt conveyor, the patent number 201410393749.7 discloses a control method for multi-drive point power balance of a belt conveyor; the application is mainly characterized in that a reference motor is selected; performing a torque adjustment process including a torque comparison, a torque deviation calculation, a torque limiter and a torque offset based on the selected reference motor; based on the result of the torque adjustment process, the input condition of the motor is set. The application can overcome the defect that the service life of the adhesive tape machine is short, but the application mainly realizes the power balance of multiple driving points of the gelatin tape machine through PID control, and cannot solve the problem that when one driving host fails in the production process of the multiple driving adhesive tape machine, a comprehensive protection device acts to trip a high-voltage cabinet, but other drives still run, so that accidents are easy to happen.

Disclosure of Invention

1. Technical problem to be solved by the utility model

In order to overcome the problems in the prior art, the utility model provides a control circuit of a high-voltage main motor of a multi-drive adhesive tape machine; the utility model provides a technical scheme controls each high pressure drive host computer of sealing-tape machine, avoids causing the production accident by the operation of a host computer or partial host computer drive whole sealing-tape machine in process of production, has greatly reduced open air iron ore long distance transport sealing-tape machine operational failure rate.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a high-voltage main motor control circuit of a multi-drive adhesive tape machine, which comprises a PLC control unit and an audible and visual alarm unit, wherein the signal end of the switching-on and switching-off position of each main motor high-voltage cabinet of the multi-drive adhesive tape machine is connected with the PLC control unit, and the control end of the PLC control unit is connected with the switching-on and switching-off contact of each main motor high-voltage cabinet of the multi-drive adhesive tape machine to monitor and control the running state of each main motor of the adhesive tape machine; the control end of the PLC control unit is simultaneously connected with the sound-light alarm unit, and the sound-light alarm unit gives an alarm when the adhesive tape machine fails in operation.

Furthermore, each main motor of the multi-drive adhesive tape machine is connected with a power supply through a high-voltage cabinet breaker DL.

Furthermore, an operation box is arranged beside each main motor of the multi-drive belt conveyor, and is provided with a manual and automatic switch SA which is connected with the PLC control unit; and the closing button SS and the opening button SB control the main motor high-voltage cabinet circuit breaker.

Furthermore, the PLC control unit controls the closing of the high-voltage cabinet circuit breaker through the output relay PLCQ and controls the opening of the high-voltage cabinet circuit breaker through the output relay PLCT.

Furthermore, the sound and light alarm unit comprises an operation indicator light HG and a sound and light alarm HA, the PLC control unit controls the operation indicator light through an output relay YX and controls the sound and light alarm through an output relay GZ.

Furthermore, the input end of the PLC control unit is also connected with an upstream equipment normal operation signal end and a downstream equipment normal operation signal end.

Furthermore, the PLC control unit adopts Siemens S7-1200 series 1214C type PLC.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

the utility model discloses a many drive sealing-tape machine high pressure main motor control circuit controls each high pressure drive host computer of sealing-tape machine, avoids causing the production accident by the operation of a host computer or partial host computer drive whole sealing-tape machine in process of production, has greatly reduced open air iron ore long distance transport sealing-tape machine operational failure rate. Meanwhile, the device is not limited by a protection function in an overhaul mode, and can drive debugging equipment in a single rotation mode, so that great convenience is brought to field production and use.

Drawings

FIG. 1 is a high-voltage primary wiring diagram of a driving motor of an adhesive tape machine;

FIG. 2 is a high-voltage secondary schematic diagram of a driving motor of the belt conveyor;

FIG. 3 is a PLC electrical control principle and wiring diagram;

FIG. 4 is an electrical schematic diagram of the multi-driving tape machine with sound and light alarm and operation indication;

FIG. 5 is a view showing a process configuration of the tape machine;

FIG. 6 is a partial view of a process flow of a production line;

FIG. 7 is a flow chart of the protection control of the multi-drive tape machine.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Example 1

When one driving main machine of the multi-driving belt conveyor fails in the production process, the comprehensive protection device acts to trip the high-voltage cabinet, but other drives still run, so that accidents are easy to happen. In view of the above problem, the present embodiment provides a control circuit for a high-voltage main motor of a multi-drive tape machine, where the control circuit includes: the system comprises a PLC control unit, a main motor high-voltage electric switching on/off control unit and an audible and visual alarm unit.

And (3) switching-on and switching-off position signals of the high-voltage cabinets of the main motors of the multi-drive adhesive tape machines are connected into the PLC control unit, and when the PLC receives the switching-on position signals of the vacuum circuit breakers of the high-voltage cabinets (connected with the auxiliary contacts of the switching-on positions of the circuit breakers), the main motors are considered to be operated. When the adhesive tape machine is started, the PLC sequentially sends a closing instruction to the high-voltage cabinets of the main motors, and when all the main motors run, the adhesive tape machine is started and finished, and the indication that the operation of the adhesive tape machine is normal is sent.

In the normal production process of the production line, the running state of each main motor of the adhesive tape machine is monitored in real time through a PLC control system. When one main motor high-voltage cabinet trips due to faults (such as undervoltage, overcurrent, short circuit and the like) or other reasons cause brake opening, the PLC immediately sends a command to open the brake of other main motor high-voltage cabinets, and production accidents caused by the fact that one main motor (or part of main motors) drives the whole adhesive tape machine to operate are avoided. Meanwhile, the chain upstream tape machine stops immediately, so that material pressing is avoided, and the operation fault indication of the tape machine is sent out.

In the embodiment, the audible and visual alarm is arranged in the on-duty room, when the operation fault of the adhesive tape machine occurs, the audible and visual alarm is sent out to remind an on-duty worker to quickly find out the fault reason and process the fault reason in time, so that the further expansion of equipment faults is avoided.

The control circuit of the embodiment utilizes the PLC to be matched with the high-voltage cabinet electrical control circuit, and realizes the multi-drive protection function after the multi-drive adhesive tape machine and the upstream and downstream equipment thereof run normally (the PLC considers that the production line enters the production mode at the moment); when the multi-drive belt conveyor is singly debugged, the protection function does not work. Therefore, the protection of equipment in a production mode can be realized, and the single-transfer debugging requirement of the adhesive tape machine can be met.

Fig. 1 is a high-voltage primary wiring diagram of a driving motor of an adhesive tape machine, and DL is a high-voltage cabinet breaker. Fig. 2 is a high-voltage secondary principle diagram of a driving motor of the belt conveyor. When the position of the manual operation is selected by the machine side operation box selection switch SA, the post operator closes and opens the brake through the machine side box buttons SS and SB, and the post operator is mainly used for overhauling single-action equipment at the machine side. When the SA selects an 'automatic' position, the tape machine drives the high-voltage cabinet to control the switch-on and switch-off of the breaker by the PLC. The PLC controls the switching-on and switching-off of the high-voltage board through the output relay, and when the PLCQ relay is actuated, the breaker of the high-voltage board is switched on, the PLCT relay is actuated, and the breaker of the high-voltage board is switched off.

Fig. 3 is a wiring diagram of the PLC electrical control of the present embodiment. L1 and N are power supplies of a PLC controller and are AC220V.24V1+,24V 1-is input signal power supply, and is DC24V.24V2+ and 24V 2-are output signal power supplies and are DC24V. And n represents the main drive number of the adhesive tape machine, if PLCQn is the PLC closing starting relay of the n # drive host of the adhesive tape machine, the relay is closed, the high-voltage circuit breaker is closed, and the auxiliary contact DLn of the high-voltage circuit breaker is switched on. PLCTn is a relay for stopping the opening of the n # driving host of the belt conveyor, when the relay is closed, the high-voltage circuit breaker is opened, and the auxiliary contact DLn of the high-voltage circuit breaker is disconnected.

Fig. 4 is an electrical schematic diagram of the acousto-optic alarm and operation indication of the multi-drive belt conveyor, and 24V3+ and 24V 3-are control power supplies which are DC24V. HG is the running light, and HA is audible-visual annunciator. The PLC output relay is used for controlling, when the YX relay is closed, the contact is conducted, and the operation indicator lamp is on; when the GZ relay is closed, the contact is conducted, and an audible and visual alarm is sent to prompt personnel to deal with the fault as soon as possible.

The multi-drive belt conveyor for the open stope is mainly driven by the head or the middle. Taking a double-drive long-distance belt conveyor at the head of a semi-continuous process for a large open-air iron ore as an example, as shown in fig. 5, 1 is a belt conveyor, 2 is a main drive of

belt conveyor #

1, and 3 is a main drive of belt conveyor # 2. Fig. 6 shows a part of the whole production line, where 4 is an upstream device of the multi-drive tape machine, 5 is the multi-drive tape machine, and 6 is a downstream device of the multi-drive tape machine.

The embodiment adopts Siemens S7-1200 series 1214C type PLC for control, and is stable, reliable, economical and applicable.

When the 1# drive host selects the automatic position at the operation box at the machine side, the PLC receives an SA1 signal, and when the 2# drive host selects the automatic position at the operation box at the machine side, the PLC receives an SA2 signal. After the PLC receives the SA1 and SA2 signals at the same time, the adhesive tape machine enters an 'automatic' mode at the moment, and the two driving hosts are controlled by the PLC.

In the automatic mode, the starting logic sequence of the multi-drive adhesive tape machine and the execution conditions of the multi-drive protection program are as follows: the downstream equipment operates normally, a YXX signal is sent to the PLC → the PLC receives the YXX signal and then controls the PLCQ1 relay to suck, the 1# driving host high-voltage circuit breaker is switched on, after the switching-on is successful, the PLC receives a circuit breaker DL1 signal → 0.5-2s of time delay, the PLC controls the PLCQ2 relay to suck, the 2# driving host high-voltage circuit breaker is switched on, after the switching-on is successful, the PLC receives a circuit breaker DL2 signal → the PLC receives DL1 and DL2 signals at the same time and then considers that the starting of the adhesive tape machine is finished, the PLC controls the YX relay to suck, operates a normal indicator lamp → continues to start the upstream equipment, after the upstream equipment operates normally, a YXS signal is sent to the PLC → the multi-drive adhesive tape machine and the upstream and downstream equipment thereof operate normally, and the system starts to execute a multi-drive protection program.

In this embodiment, a PLC control system is used to monitor closing position signals of the vacuum circuit breakers of the main motors of the tape machine in real time and perform opening control, and a control flow chart is shown in fig. 7, which specifically includes the following steps:

the PLC monitors the state of each driving high-voltage circuit breaker DLn in real time, when the 1# driving trips due to faults, the DL1 contact is disconnected, the PLC immediately sends a command to enable a PLCT2 relay to be attracted, the 2# driving circuit breaker is opened and stopped, and the phenomenon that the 2# driving operates alone to drag the whole sealing-tape machine to operate to cause the sliding of the sealing-tape machine or the breakage accident of mechanical equipment is avoided; when the 2# drive is tripped due to fault, the DL2 contact is disconnected, the PLC immediately sends an instruction to enable the PLCT1 relay to be attracted, the 1# drive circuit breaker is enabled to be switched off and shut down, and the phenomenon that the 1# drive operates alone to drag the whole adhesive tape machine to operate to cause the adhesive tape machine to slip or the mechanical equipment to break is avoided. The PLC controls the GZ relay to be closed, and gives out sound and light alarm to remind personnel to check and remove faults.

When the sealing-tape machine is debugged in a single machine, the upstream and downstream equipment are not operated, YX1 and YX2 are not conducted, the sealing-tape machine is in a single machine debugging mode, the protection is not effective, the circuit can play a production protection role and can be used for independently debugging the sealing-tape machine.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a many drive sealing-tape machine high pressure main motor control circuit which characterized in that: the control end of the PLC control unit is connected with the opening and closing contact of each main motor high-voltage cabinet of the multi-drive adhesive tape machine, and the running state of each main motor of the adhesive tape machine is monitored and controlled; the control end of the PLC control unit is simultaneously connected with the sound and light alarm unit, and the sound and light alarm unit gives an alarm when the adhesive tape machine fails in operation.

2. The control circuit of the high-voltage main motor of the multi-drive belt conveyor as claimed in claim 1, wherein: and each main motor of the multi-drive belt conveyor is connected with a power supply through a high-voltage cabinet breaker DL.

3. The control circuit of the high-voltage main motor of the multi-drive belt conveyor as claimed in claim 2, wherein: an operation box is arranged beside each main motor of the multi-drive adhesive tape machine, and is provided with a manual automatic switch SA which is connected with a PLC control unit; and the switching-on button SS and the switching-off button SB control the main motor high-voltage cabinet circuit breaker.

4. The control circuit of the high-voltage main motor of the multi-drive belt conveyor as claimed in claim 3, wherein: the PLC control unit controls the closing of the high-voltage cabinet circuit breaker through the output relay PLCQ and controls the opening of the high-voltage cabinet circuit breaker through the output relay PLCT.

5. The control circuit of the high-voltage main motor of the multi-drive belt conveyor as claimed in claim 4, wherein: the sound and light alarm unit comprises an operation indicator light HG and a sound and light alarm HA, the PLC control unit controls the operation indicator light through an output relay YX and controls the sound and light alarm through an output relay GZ.

6. The control circuit of the high-voltage main motor of the multi-drive belt conveyor as claimed in claim 5, wherein: the input end of the PLC control unit is also connected with an upstream equipment normal operation signal end and a downstream equipment normal operation signal end.

7. The control circuit of the high-voltage main motor of the multi-drive belt conveyor as claimed in claim 6, wherein: the PLC control unit adopts Siemens S7-1200 series 1214C type PLC.