CN201871705U - Continuous casting ladle roughing slag automatic control device - Google Patents

Abstract

The utility model relates to a continuous casting ladle roughing slag automatic control device, which belongs to the metallurgical continuous casting automatic control device technical field. The automatic control device has a technical scheme that the input of an automatic detection entering module is connected with a ladle weight signal while the output of the automatic detection entering module is connected with a characteristics signal grading module. The output of the characteristics signal grading module is connected with a process signal monitoring module. The output of the process signal monitoring module is connected with an automatic detection release module. The input of the process signal monitoring module is connected with a steel flow vibration signal. The output of the automatic detection release module connects and controls the ladle casting. The automatic control device in the utility model has the beneficial effects of better realizing the ladle roughing slag detection tasks such as automatic running and entering, process monitoring and controlling as well as automatic running termination, etc. and making a holographic monitoring of the ladle casting process achieved. Furthermore, the automatic control device in the utility model has the advantages of simple structure, good real-time effects, high stability, relatively low manufacturing cost, convenient installation and convenient maintenance.

Description

A kind of continuous casting ladle roughing slag automaton

Technical field:

The utility model relates to a kind of continuous casting ladle roughing slag automaton, belongs to metallurgical continuous casting steel machine process automation control appliance technical field.

Background technology:

In the continuous casting of molten steel production process, other impurity in oxidant and the molten steel mixes formation liquid slag, and its proportion is lighter, has only about 1/3rd to 1/4th of clean steel water proportion, floats on molten steel top.In the molten steel casting later stage, slag flows into tundish gradually, influences steel quality, makes continuous casting of molten steel can't carry out even cause production accident when serious.One of key technology that following slag detection system is produced as continuous casting of iron and steel, countries in the world have all given great attention.The eighties in last century, Ferrous Metallurgy research institute of Aachen, Germany University of Science and Technology begins to develop the ladle roughing slag Automatic Measurement Technique, and obtains the subsidy of the European Community.They detect the following slag of molten steel with a kind of electromagnetic method, at the peripheral coil of installing in the big bag bag mouth of a river, the end, when molten steel when connecing the coil of alternating current, will produce eddy current, these eddy current can change the intensity in magnetic field; Because the electric conductivity of slag is the one thousandth of molten steel, if contain a small amount of slag in the steel stream, eddy current will weaken, and reduces and magnetic field is also corresponding; The variation of magnetic field intensity can detect by secondary coil, this low voltage signal must transmit in the noise circumstance of steel mill, desired signal must be through filtering, could produce that an energy and other measurement data be complementary determine and useful signal, this point can adopt simulation to gather mutually with digital filter and a temperature compensation system reaches.The assembly of system must be sturdy and durable, the severe rugged environment that can bear steel mill, and the validity that could guarantee system applies is with stable.Thyssen iron company at first adopted the ladle roughing slag Automatic Measurement Technique at a platen billet continuous casting machine in 1987, had obtained satisfied result.Several researchers of RWTH's Ferrous Metallurgy research institute utilized the ladle roughing slag Automatic Measurement Technique of being succeeded in developing to set up Amepa company afterwards, promoted the ladle roughing slag Automatic Measurement Technique in the world.Though electromagnetic detection method slag context of detection under molten steel has obtained than ten-strike, also have some bigger problems in its application process: 1) price is higher; The electromagnetic type ladle roughing slag automatic checkout equipment investment of for example German Amepa company needs 500,000 marks at least, some large-scale iron and steel enterprises for China, a large amount of these equipment of introducing are quite huge investments, and are then beyond affordability for most of medium and small steel production enterprise; 2) installation is loaded down with trivial details; Electromagnetic method checkout gear structure is comparatively complicated, installation process is more loaded down with trivial details, and need carry out certain transformation to the continuous casting production equipment during sensor installation and could install, this will bring some influences to continuous casting production, causes unnecessary economic loss to steel production enterprise; 3) maintenance cost height, service life is shorter; Because solenoid works long hours under abominable hot environment, be easier to damage, and detection system was lost efficacy, therefore need periodic maintenance, more emat coil (price of coil is higher, several ten thousand do not wait to hundreds thousand of).

At present, more domestic iron and steel enterprises are for general steel grade, and continuous casting production adopts steel ladle pouring to judge by near the mode of liquid steel level operative employee's perusal ladle long nozzle insertion tundish whether ladle descends slag latter stage.If adopt the mode of manually declaring slag, when the operative employee observed ladle roughing slag, it is more that the actual steel that flow into tundish flows the quantity of slag.Flow into the slag of tundish, some arrives the tundish molten steel surface, causes the surface crust, may cause operating accident; And more seriously, have the part slag to pour in the continuous casting billet along with steel stream, and cause steel inclusion to exceed standard, cause quality problems.Along with high-grade variety steel steel grade is more and more, output is also more and more higher, and the problem of ladle roughing slag is more and more outstanding.

The utility model content:

The utility model purpose provides a kind of continuous casting ladle roughing slag automaton, low cost, good stability, accuracy of detection height, and long service life solves background technology and has the problems referred to above.

The technical solution of the utility model is:

A kind of continuous casting ladle roughing slag automaton, comprise automatic detection input module, characteristic signal diversity module, process signal monitoring and administration module, the automatic detection and withdraw from module, automatically detect the input that drops into module and connect the ladle weight signal, output connection features signal diversity module, the output connection procedure signal monitoring and the administration module of characteristic signal diversity module, process signal monitoring are connected with the output of administration module to detect automatically withdraws from module.

The process signal monitoring is connected steel stream vibration signal with the input of administration module, detect the output of withdrawing from mould automatically and connect the control ladle pouring.

The utility model detects the input module automatically and determines according to the continuous casting production process whether the ladle roughing slag automatic control system enters duty, the characteristic signal diversity module is finished steel stream impact shock seasonal effect in time series index signal extraction work, the process signal monitoring module is responsible for control in real time of the continuous casting production process of ladle roughing slag automatic control system after entering duty and management, automatically detecting and withdrawing from module then is after the ladle roughing slag automatic control system is finished a certain following slag that waters time and detected, automatically the state of deactivating drops into until wait for detecting next time.

The beneficial effects of the utility model: 1. can realize automatic operation input, process monitoring and control that ladle roughing slag detects, task such as run abort automatically preferably, realize the holography of steel ladle pouring process is monitored; 2. simple structure, real-time is good, stability is high, manufacturing cost is lower, can overcome preferably electromagnetic induction coil formula ladle roughing slag detection system intrinsic detection accuracy rate low, service life is short and make maintenance cost than problems such as height; 3. installation, easy to maintenance does not need the existing equipment of continuous casting workshop is rearranged and transforms, and can not cause any harmful effect to normal continuous casting production.

Description of drawings:

Fig. 1 is the utility model example structure schematic diagram;

Among the figure: detect automatically and drop into module 1, characteristic signal diversity module 2, process signal monitoring and administration module 3 detect automatically and withdraw from module 4, ladle pouring 5, ladle weight signal 6, steel stream vibration signal 7.

The specific embodiment:

Below in conjunction with accompanying drawing, the utility model is described in further detail by embodiment.

A kind of continuous casting ladle roughing slag automaton, comprise automatic detection input module 1, characteristic signal diversity module 2, process signal monitoring and administration module 3, the automatic detection and withdraw from module 4, automatically detect the input that drops into module 1 and connect ladle weight signal 6, output connection features signal diversity module 2, the output connection procedure signal monitoring of characteristic signal diversity module 2 and administration module 3, process signal monitoring are connected with the output of administration module 3 to detect automatically withdraws from module 4.The process signal monitoring is connected steel stream vibration signal 7 with the input of administration module 3, detect the output of withdrawing from mould 4 automatically and connect control ladle pouring 5.

Automatically detect and drop into module (Automatic Detection Entering Module, ADEM), characteristic signal diversity module (Characteristics Signal Grading Module, CSGM), process signal monitoring and administration module (Process Signal Monitoring Module, PSMM), automatically detect and withdraw from module (Automatic Detection Release Module ADRM) is functional module.

Described automatic detection drops into module, judges current casting condition according to treated ladle weight signal; When ladle weight reached institute's pre-set threshold, module was triggered, and sent the duty request that enters to the process signal monitoring with administration module; After request was verified, the ladle roughing slag detection system entered duty.Described ladle weight signal is handled and is comprised digital filtering and two processes of time lag processing; Described digital filtering process is three grades of data processing operations that the ladle weight signal of being gathered carried out butterworth filter, anti-mixing and filtering, medium filtering, disturbs and continuous casting workbench vibratory impulse interference effect with the forceful electric power of eliminating the continuous casting workshop; Described time lag is handled feature time lag that is meant at the ladle LOAD CELLS, the burst that collects is carried out time bias calculate, thereby guarantee signal collected real-time.It is the trigger condition of continuous casting ladle roughing slag detection system work that described ladle weight threshold is set, and promptly current ladle weight is that five of initial weight/for the moment, the module of detection input automatically is activated; Described requests verification process is meant that process signal is monitored and administration module is verified with the request instruction that cyclic redundancy check method sends automatic detection input module.

Described characteristic signal diversity module is impacted real-time vibration signal with the steel stream that collects and is carried out the feature extraction processing, constitutes steel ladle pouring process standard template.Described signal characteristic extracts processing procedure: after real-time steel stream impact shock signal is carried out preliminary treatment, calculate its energy value and kurtosis value respectively; The intensity of described energy value reflection steel stream impact shock signal, the sudden change feature of described kurtosis value reflection steel stream impact shock; After obtaining above-mentioned characteristic parameter, in conjunction with other technical parameter of casting process, the common composition towards the standard form of steel stream casting condition Dynamic Recognition, as the foundation of online judgement.

Described process signal monitoring and administration module respond by automatic detection input module, detect the task requests of withdrawing from module automatically, and mate calculating according to current demand signal feature and standard form, finally obtain current steel stream casting condition.The implementation procedure that described coupling is calculated is: will collect real-time vibration signal and standard form and compare, and utilize least square method to determine current steel stream casting condition.

Module is withdrawn from described automatic detection, and the online real-time command of intercepting process signal monitoring and administration module detects when finishing originally watering time down the slag process, sends the state request of deactivating to detection system; System enters holding state.The described online process of intercepting is meant that this module carries out real-time command according to certain time interval and accept, and carries out different task according to the status word of instruction header; Described instruction header status word is represented the duty that the ladle roughing slag detection system is about to enter, i.e. the task of this module response classification comprises that mainly holding state continues, duty enters, duty continues, duty is withdrawn from; Described working state of system is meant the real-time steel stream of system acquisition impact shock signal, and carries out real-time Dynamic Recognition, and it enters by aforesaid ladle weighing-up wave threshold triggers; The system that is meant described system standby state withdraws from the state that follow-up work is waited in the back that detects, its real-time command by response process signal monitoring and administration module enters, and withdraw from module by automatic detection and export the mouth of a river shutdown signal that continues, realize the real-time monitoring and the control of steel ladle pouring process.

Claims (2)

1. continuous casting ladle roughing slag automaton, it is characterized in that comprising automatic detection input module (1), characteristic signal diversity module (2), process signal monitoring and administration module (3), the automatic detection and withdraw from module (4), automatically detect the input that drops into module (1) and connect ladle weight signal (6), output connection features signal diversity module (2), the output connection procedure signal monitoring of characteristic signal diversity module (2) and administration module (3), process signal monitoring are connected with the output of administration module (3) to detect automatically withdraws from module (4).

2. the continuous casting ladle roughing slag automaton according to claim 1 is characterized in that the process signal monitoring is connected steel stream vibration signal (7) with the input of administration module (3), detect the output of withdrawing from mould (4) automatically and connect control ladle pouring (5).

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