CN201208616Y - Independent monitoring system for roller motor leading detection in metal rolling and processing - Google Patents

Abstract

The utility model provides an advanced detection independent monitor and control system for a roll table motor during metal rolling, and belongs to an advanced detection independent monitor and control system for a roll table motor during metal rolling in the metallurgical industry. The utility model aims to provide an advanced detection independent monitor and control system for a roll table motor applied in metal rolling by means of insulation advanced detection and independent monitor. The advanced detection independent monitor and control system is characterized in that a contactless switch, a hall sensor, a motor insulation advanced detector are joined to each automatic switch between the automatic switch and the roll table motor in turn; the contactless switch, the hall sensor and the motor insulation advanced detector are joined to a motor operation monitor terminal, and then joined to a communication link. The advanced detection independent monitor and control system adopts the advanced computerized control and management technology DCS for automatically monitoring the insulation of the motor, continuous production and analyzing the data of the motor, thereby significantly reducing the downtime and improving the output of the production line.

Description

The independent monitoring system of the leading detection of electric machines for roller in the metal rolled processing

Technical field

The utility model belongs to that the electric machines for roller in the metal rolled processing detect in advance in the metallurgical industry, independent monitoring system.

Background technology

In metallurgical industry in modern age, metal rolled is very important processing link.In this link, rolling workpiece 1 leans on the roller-way transmission before and after mill stand that is dragged by roller motor 3, reaches the purpose of the roll forming of postponing.In rolling process, transmit roller-way and form by tens of extremely hundreds of rollers 2.Each roller is by a driven by motor, and these roller motors are by power distribution equipment cabinet parallel operation, and under the condition that is subjected to total operation control, each roller is exported unidirectional power at one time, drives workpiece work.Its working method as shown in Figure 1 and Figure 2.Consider the optimization of configuration, when actual design, roller-way is grouping control, and being generally per 10-20 rollers is one group, according to field working conditions, moves at interval during every component.In rolling mill practice now, each group all is an inverter supply, and every group electric machines for roller are configuration in parallel, is connected on the power supply buses by frequency converter output.Drag roller-way with inverter supply, its advantage is starting, stop not have impacts, and can change the travelling speed of workpiece according to the rotating speed that mill speed is regulated roller-way, reaches the purpose of high efficiency production.At present, in rolling mill practice, its roller-way group motor power supply the principle as shown in Figure 3.As seen from Figure 3, the power supply of electric machines for roller is confessed by frequency converter, delivers on the power supply buses, and every motor links to each other with power supply buses by automatic switch ZK, and this is simple in structure, economical, but can not grasp the running status of every bench roller road motor.Though the existing structure in the above-mentioned background technology has solved starting, has stopped and the speed governing problem, there is a problem to avoid, when promptly the separate unit motor breaks down, can't independent judgment, and carry out and handle operation.The fault that its result will arrive the fault motor often repeatedly repeats, and when causing phase fault or ground connection, frequency converter or direct current station perceive fault, just can bypass the immediate leadership and carry out fault blocking-up operation.Like this, just caused single group or the power failure of whole electric machines for roller, production process can't be carried out continuously, causes to produce to pause.In the control configuration; though every motor is furnished with automatic switch ZK; can carry out action protection to the fault that motor took place; but have two kinds of situations that protection is effectively carried out: the one, when overload takes place owing to steel-fastening, heap steel or other reason in motor; ZK can move; why and take place but present system can not tell inspection management with the action situation, and which kind of fault has taken place for this.When

The roller-way stoppage in transit is found in inspection, and ZK jumps the stopping time, is to protect the production time, and patrolling and examining can only be that ZK is resetted, and allows it rework, and notes down, and can't investigate failure cause; The 2nd, because rolling environment is abominable, because dust or water erosion, when causing serious situation that certain motor really is short-circuited ground connection; frequency converter is owing to consider the safety of self IGBT; can move prior to automatic switch ZK, and cause whole group to be shut down, and even cause stopping production completely.Show that by producing statistics the production that causes because of the electric machines for roller fault is mistaken and accounted for about 20% of the total failare time.Therefore, urgently in there being a kind of new departure to replace, the effect of new departure is the roller-way electric power system in the existing metallurgy rolling: exported by frequency converter, when motor is carried out parallel connection, when fault has taken place certain motor, system can report fault rapidly, and with this motor from disconnection in service.Because whether the 1-2 bench roller tube work in every group does not influence the workpiece transmission, like this can the processing motor fault, production is carried out smoothly.

Summary of the invention

The purpose of this utility model is to provide a kind of and adopts that insulation is leading to be detected independent monitoring and be applied in that electric machines for roller in the metal rolled processing detect in advance, independent monitoring system.The utility model is finished with following mode: the independent monitoring system of the leading detection of the electric machines for roller in a kind of metal rolled processing, power supply frequency converter INV is connected on the power supply buses 4, group electric machines for roller D on power supply buses 4 and more than being connected with, and between power supply buses 4 and every group of electric machines for roller D, every group all is connected with automatic switch ZK respectively, it is characterized in that: between every group automatic switch ZK and electric machines for roller D, automatic switch ZK connects noncontacting switch ERS successively, Hall element HC, the leading detector OIT of electrical machine insulation connects with every group of electric machines for roller D again; Above-mentioned noncontacting switch ERS, Hall element HC, the leading detector OIT of electrical machine insulation are outer respectively to be connected to motor operation monitoring terminal MOT, is connected on the communication line BS again.The utility model relatively has the following advantages with similar technology: adopted advanced computer control managing technology DCS 1..2. the insulation status of motor is done monitoring automatically, and reported result.3. but independent process separate unit electrical fault does not influence continuous production.4. adopt the host computer management, motor operating parameter can be stored continuously, can carry out data analysis to motor.5. shorten greatly the fault time that causes because of electric machines for roller, therefore production line output improve.Compare with existing power supply mode, the structure of new technology has had tangible modern management advantage.

Description of drawings

Fig. 1 is that the roller-way in the background technology transports the workpiece schematic diagram, is front view.

Fig. 2 is that the roller-way in the background technology transports the workpiece schematic diagram, is left view.

Fig. 3 is the electric machines for roller list group electrical schematic diagram in the background technology.

Fig. 4 is background technology and comparison diagram of the present utility model.

Fig. 5 is an electrical schematic diagram of the present utility model.

The specific embodiment

Now the utility model is described in further detail in conjunction with the accompanying drawings.The utility model has adopted the DCS technology, and has adopted the leading detection scheme of insulation first on metallurgical electric machines for roller, and this scheme can detect the insulaion resistance of every motor at any time.For reaching the purpose of independent monitoring, every motor has been equipped with a monitor terminal, matches with it, returns every motor main circuit and has disposed contactless master and connect switch, so that carry out independent monitored instruction.In major loop, also disposed the three-phase current of every motor of Hall current sensor detection, there is any motor that fault is arranged as in service, monitor terminal can be caught rapidly by Hall element, and disconnecting motor rapidly by noncontacting switch, fault message can be delivered to upper management by RS-485; Insulation detects to be carried out when motor is shut down, as it is on the low side to detect the electrical machine insulation value, and monitor terminal also can connect switch by contactless master motor is disconnected, and has avoided the fault state of affairs to enlarge, and has reported upper.Like this, originally all fronts stopping production phenomenon that causes because of the electric machines for roller fault can obtain radical cure.The utility model system electrical schematic diagram as shown in Figure 5.This figure is described to be the management of one group of 10 motor, and every device code name and title all indicate as figure, and its operation principle is as follows: the work beginning, by manually every machine automatic switch ZK1-10 being served, this is operation first earlier, running hours, not often operation.This moment, frequency converter INV did not work, and insulation detects OIT1-10 and offers work, checks the insulation status of every motor, and is sent to testing result upper by terminal.As the insulation resistance value≤0.02M Ω of certain motor, can show " insulation resistance value is on the low side " prompting on the monitor terminal MOT blue screen, but also pin this major loop by noncontacting switch (or contactor) ERS, do not allow it devote oneself to work, and report and submit upper.This kind monitoring in the roller-way standby therebetween, and is continuous always, and promptly motor is during stopping transport, and its insulation values is in examined state always.Arrive if any work order, in the very first time, MOT can send instruction, disconnects insulating monitoring OIT, opens ERS then, and INV powers to every motor by bus, and electric machines for roller are started working.When a certain motor owing to steel-fastening, heap steel or other reason overload took place, current of electric can increase, and Hall element HC can detect the variation of electric current, and monitor terminal MOT is delivered in this variation, and MOT can determine whether to protect according to electric motor protecting inverse time lag curve.As need protection, MOT can send instruction, disconnects ERS, this motor is quit work, and report and submit host computer; In the motor safety range of operation, MOT can not stop this motor as changing value, but can change notification is upper.Meanwhile, frequency converter INV also can detect the variation of electric current, and entail dangers to is not to the safe operation of INV but the overload of separate unit motor increases electric current, so INV can not protect action, other electric machines for roller can normally move, and do not influence continuous production.As roller-way work since inter process every normally stopping; frequency converter INV stops power supply; the whole automatic disconnections of ERS meeting this moment; OIT can all drop into again the motor mensuration that insulate; till begin next time ....; go round and begin again, so, formed one complete work alone, monitoring, protection system.

Claims (1)

1. the electric machines for roller in the metal rolled processing are leading detects independent monitoring system, power supply frequency converter [INV] is connected on the power supply buses [4], go up and be connected with many group electric machines for roller [D] at power supply buses [4], and between power supply buses [4] and every group of electric machines for roller [D], every group all is connected with automatic switch [ZK] respectively, it is characterized in that: between every group automatic switch [ZK] and electric machines for roller [D], automatic switch [ZK] connects noncontacting switch [ERS] successively, Hall element [HC], the leading detector of electrical machine insulation [OIT] connects with every group of electric machines for roller [D] again; Above-mentioned noncontacting switch [ERS], Hall element [HC], the leading detector of electrical machine insulation [OIT] are outer respectively to be connected to motor operation monitoring terminal [MOT], is connected on the communication line [BS] again.

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