CN202956668U - Measurement and control system with resistance strain type impact flowmeter - Google Patents
Measurement and control system with resistance strain type impact flowmeter Download PDFInfo
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- CN202956668U CN202956668U CN 201220125892 CN201220125892U CN202956668U CN 202956668 U CN202956668 U CN 202956668U CN 201220125892 CN201220125892 CN 201220125892 CN 201220125892 U CN201220125892 U CN 201220125892U CN 202956668 U CN202956668 U CN 202956668U
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Abstract
The utility model belongs to the technical field of industrial automatic control and provides a measurement and control system with a resistance strain type impact flowmeter, wherein the system comprises a programmable controller (6), a flow detection module (7), a switching value input module (8), a human-computer interface (9), an electromagnetic vibrating feeding module (10) and a switching value output module (11). The measurement and control system not only can carry out the continuous on-line measurement of solid granular materials but also can carry out the on-line closed loop feedback and real-time adjustment of feeding flow, so that an application requirement for uniform and precise feeding is met; besides, the resistance strain type impact flowmeter serves as a flow signal acquisition component of the measurement and control system, so that manufacture and maintenance are easy to perform, the acquisition and transmission quality of flow signals is improved, and the accuracy of measurement is improved; and moreover, the system is novel in conception, reasonable in composition, reliable in function and high in automation degree, and the system is easy to implement, so that the system has excellent use values.
Description
Technical field
The utility model belongs to the industry automatic control technical field, relates in particular to a kind of TT&C system of strip resistance strain-type impact flow meter.
Background technology
For the flow measurement of solid particle material, usually adopt band " horizontal shift formula " impact flow meter (as, DE10, DE20, DE30 impact flow meter and 61H, 61H2, the 61H3 impact flow meter of circulation on the market at present) measuring system measured.This measuring system, flow for various solid particle materials may be implemented in the line continuous coverage, and there is the multiple output functions such as feed flow, feed total amount (flow and time are long-pending) control, therefore, in fields such as chemical industry, cement, power station, mining, metallurgy, grains, be widely used.
Control system in this measuring system (abbreviation TT&C system), generally be comprised of momentum transmitter and two parts of flow integrator, and wherein, the momentum transmitter can be referred to as again: differential transformer or differential pick-up or displacement transducer.Its known principle of work, in conjunction with Fig. 1, is described as follows:
By Fig. 1, known, when feeding device 1,2 times drop impacts of the solid particle material provided are during to " horizontal shift formula " impact flow meter 3, and the impulsive force of shock plate face can be decomposed into two component---vertical stress component Fp, horizontal component Fm.Wherein, vertical stress component Fp, can be sponged by the rigid structure complete equipilibrium in " horizontal shift formula " impact flow meter 3, inoperative; Horizontal component Fm, can make its punching and subsequent punching produce horizontal shift with rotating shaft 3a, thereby make displacement transducer 4 receive the displacement induced signal, displacement is changed into to electric signal, subsequently, send flow integrator 5 to and carry out the integrating processing, and can show feed flow, feed total amount, can reach the purpose that on-line continuous is measured solid particle material.
Yet this TT&C system but has following some deficiency:
1, above-mentioned TT&C system, although can reach the purpose of on-line continuous measurement, but due to the execution unit concrete as it using feeding device not, include same TT&C system in and controlled, thereby, be difficult to carry out the online feed flow of adjusting in real time feeding device, then, be difficult to control the homogeneity of feed flow of feeding device and the accuracy of feed total amount, this for some need evenly, the application scenario of accurate feeding, and inapplicable.
2, above-mentioned TT&C system, the principle of work of momentum transmitter used, system is based upon on the theoretical foundation of " horizontal shift inductive transfer ", therefore, and the impact flow meter of principle design according to this, the measurement accuracy of its TT&C system, be subject to the impact of production technique and the later maintenance situation of impact flow meter, as, owing to making, the horizontal shift of meticulous do not caused punching after stressed is not smooth, must directly affect the transmission of displacement induced signal, then affect the measurement accuracy of TT&C system.
The utility model content
For addressing the above problem, the purpose of this utility model is to provide a kind of TT&C system of strip resistance strain-type impact flow meter,, include electro-vibrating feeder in same TT&C system, not only can on-line continuous measure solid particle material, but the feed flow is fed back, adjusted in real time to line closed loop, meet application demand even, accurate feeding; Flow signal acquisition parts using the resistance-strain type impact flow meter as TT&C system, be easy to make, safeguard, and can improve collection and the Transfer Quality of feed flow signal, improves the measurement accuracy of TT&C system; In addition, this system, novel, rationally distributed, reliable in function, automaticity is high, and easy to implement, has good use value.
To achieve these goals, the utility model is taked following technical proposals:
A kind of TT&C system of strip resistance strain-type impact flow meter comprises: Programmable Logic Controller, flow detection module, switching input module, man-machine interface, electric and magnetic oscillation feed module and switching value output module; Described Programmable Logic Controller comprises switching value control circuit and analog quantity control circuit; The input end of described analog quantity control circuit is connected with the flow detection module, and the output terminal of analog quantity control circuit is connected with electric and magnetic oscillation feed module; The input end of described switching value control circuit is connected with switching input module, and the output terminal of described switching value control circuit is connected with switching value output module; Described man-machine interface, be connected with Programmable Logic Controller as man-machine dialogue interface.
Described flow detection module comprises: resistance-strain type impact flow meter, flow accumulation display instrument and the automatically controlled circuit configured; In in described resistance-strain type impact flow meter, the resistance strain type sensor of band is connected with the analog quantity control circuit input end of Programmable Logic Controller by the flow accumulation display instrument.
Described switching input module comprises: the automatically controlled circuit that system emergency stop switch, control model select button, feed model selection button, alarm mode to select button and configure; Described system emergency stop switch is a system scram button ST; It is that a control model is selected knob SA1 that described control model is selected button, and wherein, " screwing " is for selecting; Described feed model selection button comprises a feed start button SB1 and a feed X button SB2; Described alarm mode selects button to comprise an audible alarm selection knob SA2, ann silence button SB3, the overproof warning selection knob SA3 of feed flow and the overproof warning selection of a feed total amount knob SA4.
Described electric and magnetic oscillation feed module comprises: electro-vibrating feeder, vibrating controller and the automatically controlled circuit configured; Described electro-vibrating feeder is connected with the analog output end of Programmable Logic Controller by vibrating controller, and is connected with the switching value output terminal of Programmable Logic Controller by auxiliary reclay KA1, the automatically controlled circuit that configures.
Described switching value output module comprises: manual flow regulation assembly, duty indication component, alerting signal indication component and the automatically controlled circuit configured; Described manual flow regulation assembly is a flow regulation potentiometer R, and the automatically controlled circuit of using auxiliary reclay KA2 and configuring by flow regulation, with the input end of vibrating controller, links, and then controls the feed flow of electro-vibrating feeder; Described duty indication component comprises an automatic control working station indicator HL1 and a manually controlled work status indicator lamp HL2; Described alerting signal indication component comprises an audible alarm indicator TL, an overproof alarm lamp HL3 of feed flow and an overproof alarm lamp HL4 of feed total amount.
Owing to adopting above-described technical scheme, the utility model can reach following beneficial effect:
1, the TT&C system of a kind of strip resistance strain-type impact flow meter described in the utility model, organically, by the automatically controlled part of electro-vibrating feeder and the observing and controlling part of impact flow meter, tie as a whole, include same TT&C system in, novel, rationally distributed, and reliable in function;
2, the TT&C system of a kind of strip resistance strain-type impact flow meter described in the utility model, not only can on-line continuous measure solid particle material, but and the line closed loop feedback, adjust the feed flow in real time, meet evenly, the demand of accurate feeding;
3, the TT&C system of a kind of strip resistance strain-type impact flow meter described in the utility model, flow signal acquisition execution unit using the resistance-strain type impact flow meter as TT&C system, and application resistance-strain type sensing principle, improve widely sensitivity and the Transfer Quality of signals collecting, thereby can further improve the measurement accuracy of TT&C system;
4, the TT&C system of a kind of strip resistance strain-type impact flow meter described in the utility model, simple possible, performance safety, reliable, and automaticity is high, and easy to maintenance, easy to implement, there is good use value.
The accompanying drawing explanation
Fig. 1 is the existing feed weighing configuration schematic diagram with horizontal shift formula impact flow meter;
The TT&C system arrangement plan that Fig. 2 is a kind of strip resistance strain-type of the utility model impact flow meter;
The TT&C system theory diagram that Fig. 3 is a kind of strip resistance strain-type of the utility model impact flow meter;
The TT&C system electrical principle that Fig. 4 is a kind of strip resistance strain-type of the utility model impact flow meter;
The TT&C system configuration schematic diagram that Fig. 5 is a kind of strip resistance strain-type of the utility model impact flow meter;
The TT&C system automatic control flow chart figure that Fig. 6 is a kind of strip resistance strain-type of the utility model impact flow meter;
The manual control flow chart of TT&C system that Fig. 7 is a kind of strip resistance strain-type of the utility model impact flow meter;
The TT&C system work schematic diagram that Fig. 8 is a kind of strip resistance strain-type of the utility model impact flow meter.
In figure: 1, feeding device; 2, solid particle material; 3, " horizontal shift formula " impact flow meter; 3a, punching rotating shaft; 4, displacement transducer; 5, flow integrator; 6, Programmable Logic Controller; 7, flow detection module; 8, switching input module; 9, man-machine interface; 10, electric and magnetic oscillation feed module; 11, switching value output module; 12, resistance-strain type impact flow meter; 12a, resistance strain type sensor; 12b, groove punching; 12c, spill punching support; 12d, boss pedestal; 12e, base plate; 13, flow accumulation display instrument; 14, system emergency stop switch; 15, control model is selected button; 16, feed model selection button; 17, alarm mode is selected button; 18, electro-vibrating feeder; 19, vibrating controller; 20, manual flow regulation assembly; 21, duty indication component; 22, alerting signal indication component; 23, electrical control cubicles; 24, hopper; 25, casting mold sandbox; 25a, casting mold sandbox cast gate; 26, molten iron; 27, casting ladle; 28, Y-type three way type pipe fitting; 29, press air road assembly; 30, feed leakage bucket; 31, the first support and connection plate; 32, inovulant; 33, charging gear; 34, the second support and connection plate; 35, material guiding hopper.
In another figure: Fm, horizontal component; Fp, vertical stress component; ST, system scram button; SA1, control model are selected knob; SA2, audible alarm are selected knob; Knob is selected in SA3, the overproof warning of feed flow; Knob is selected in SA4, the overproof warning of feed total amount; SB1, feed start button; SB2, feed X button; SB3, ann silence button; Auxiliary reclay KA1, flow regulation auxiliary reclay KA2; R, flow regulation potentiometer; HL1, automatic control working station indicator; HL2, manually controlled work status indicator lamp; HL3, the overproof alarm lamp of feed flow; HL4, the overproof alarm lamp of feed total amount; TL, audible alarm indicator.
One of illustrate: the feeding device 1 described in Fig. 1, its feed can be the multiple feeding devices that solid particle material can be provided continuously such as screw feeder, vibrating feed, Belt Conveying feed.
Illustrate two: " horizontal shift formula " impact flow meter 3 described in Fig. 1 is a known products, is being able on the market widespread use at present, therefore simply show it at this with figure shown in piece number 3, explanation hereby.
Embodiment
Can explain in more detail the utility model by the following examples, the utility model is not limited to the following examples, and open the purpose of this utility model is intended to protect all changes and improvements in the utility model scope.
By Fig. 2, Fig. 3, known, a kind of TT&C system of strip resistance strain-type impact flow meter comprises: Programmable Logic Controller 6, flow detection module 7, switching input module 8, man-machine interface 9, electric and magnetic oscillation feed module 10, switching value output module 11; Described Programmable Logic Controller 6, comprise switching value control circuit and analog quantity control circuit; The input end of described analog quantity control circuit is connected with flow detection module 7, and the output terminal of analog quantity control circuit is connected with electric and magnetic oscillation feed module 10; The input end of described switching value control circuit is connected with switching input module 8, and the output terminal of described switching value control circuit is connected with switching value output module 11; Described man-machine interface 9, dialog interface as transmission, exchange message between man-machine, be connected with Programmable Logic Controller 6, to what input on man-machine interface 9, such as information such as feed setting parameters, can implement analyzing and processing by Programmable Logic Controller 6, to meet the needs of actual use.
By Fig. 2, Fig. 3, Fig. 4, known, described flow detection module 7 comprises: resistance-strain type impact flow meter 12, flow accumulation display instrument 13 and the automatically controlled circuit configured, the resistance strain type sensor 12a of resistance-strain type impact flow meter 12 interior bands is connected with the analog quantity control circuit input end of Programmable Logic Controller 6 by flow accumulation display instrument 13, wherein, selected resistance strain type sensor 12a system carries out work based on such principle: the elastic body on it (flexible member) acts on the lower elastic deformation that produces outside, make and stick on surperficial resistance strain gage (conversion element) also in company with producing distortion, resistance strain gage after distortion, resistance changes, through corresponding metering circuit, this variation is converted to voltage again, thereby complete the process that external force is transformed to electric signal.
By Fig. 2, Fig. 3, Fig. 4, known, described switching input module 8 comprises: the automatically controlled circuit that the system emergency stop switch 14 be connected with Programmable Logic Controller 6 switching value input ends, control model select button 15, feed model selection button 16, alarm mode to select button 17 and configure; Wherein, described system emergency stop switch 14, be a system scram button ST; Described control model is selected button 15, is a control model and selects knob SA1, wherein, screws for selecting; Described feed model selection button 16, comprise a feed start button SB1 and a feed X button SB2; Described alarm mode is selected button 17, comprise an audible alarm selection knob SA2, ann silence button SB3, the overproof warning selection knob SA3 of feed flow and the overproof warning selection of a feed total amount knob SA4, wherein, screw SA2 or SA3 or SA4, for selecting audible alarm or the overproof warning of feed flow or the overproof warning of feed total amount.
By Fig. 2, Fig. 3, Fig. 4, known, described electric and magnetic oscillation feed module 10 comprises: electro-vibrating feeder 18, vibrating controller 19 and the automatically controlled circuit configured; Described electro-vibrating feeder 18, not only by vibrating controller 19, with the analog output end of Programmable Logic Controller 6, be connected, and the automatically controlled circuit of using auxiliary reclay KA1 and configuring by batcher, with the switching value output terminal of Programmable Logic Controller 6, be connected; Wherein, the feed process of selected electro-vibrating feeder 18 is: the solenoid on batcher is through vibrating controller 19 output power supplies, and under electromagnetic force, the feeder trough forced vibration of batcher, and force solid particle material in feeder trough in vibration processes constantly upwards the place ahead throw, thereby reach the purpose of continuous-feeding.
By Fig. 2, Fig. 3, Fig. 4, known, described switching value output module 11 comprises: manual flow regulation assembly 20, duty indication component 21, the alerting signal indication component 22 be connected with Programmable Logic Controller 6 switching value output terminals and the automatically controlled circuit configured; Wherein, described manual flow regulation assembly 20, be a flow regulation potentiometer R, and the automatically controlled circuit of using auxiliary reclay KA2 and configuring by flow regulation, link with the input end of vibrating controller 19, then control the feed flow of electro-vibrating feeder 18; Described duty indication component 21 comprises an automatic control working station indicator HL1 and a manually controlled work status indicator lamp HL2; Described alerting signal indication component 22 comprises an audible alarm indicator TL, an overproof alarm lamp HL3 of feed flow and an overproof alarm lamp HL4 of feed total amount.
By Fig. 5, Fig. 6, Fig. 7 and know in conjunction with Fig. 2, Fig. 3, Fig. 4, a kind of method of work of TT&C system of strip resistance strain-type impact flow meter, be divided into automatic control and manually control two kinds, is described below:
One, automatically control method of work, step is as follows:
1) switch on power: though a kind of TT&C system of strip resistance strain-type impact flow meter, in treating duty;
2) select automatic control mode: at first, in control model, select on button 15, screw control model and select knob SA1, secondly, select on button 17 at alarm mode, screw audible alarm and select knob SA2, the overproof warning of feed flow to select knob SA3, the overproof warning of feed total amount to select knob SA4, make whole TT&C system in automatic control state, and automatic control working station indicator HL1 bright light shows, shows to select complete;
3) set the feed parameter: the feed parameter is set on man-machine interface 9, comprises: the setting of feed time value, feed flow and the setting of biased error value, feed total amount and biased error value are set;
4) start the feed button: on feed model selection button 16, press feed start button SB1, batcher is at once closed with auxiliary reclay KA1, and electric and magnetic oscillation is started working to electro-vibrating feeder 18, vibrating controller 19 in material unit 10, and automatically completes the following course of work:
4-1) electro-vibrating feeder 18 feeds, and can accept the regulation and control instruction that follow-up Programmable Logic Controller 6 sends, through vibrating controller 19, adjust the amplitude of electro-vibrating feeder 18, adjust the feed flow;
The solid particle material 2 that 4-2) electro-vibrating feeder 18 provides, when lower drop impact is upper to the groove punching 12b of resistance-strain type impact flow meter 12, make resistance strain type sensor 12a produce elastic deformation, resistance value changes, and is converted into Voltage-output to flow accumulation display instrument 13;
The resistance-strain signal that 4-3) flow accumulation display instrument 13 is accepted from resistance strain type sensor 12a, carry out the integrating processing, and show current feed flow value, feed total amount value, export subsequently the analog input end that analog signals enters Programmable Logic Controller 6;
4-4) enter the analog signals of Programmable Logic Controller 6, with the feed parameter of setting, compare analysis, calculation process on step 3) man-machine interface 9;
4-5) Programmable Logic Controller 6 is delivered to the analog output end by the controlling value after computing, and is converted into the micro-electric current of direct current 4-20mA and reaches vibrating controller 19;
4-6) current signal of output drives vibrating controller 19, and electro-vibrating feeder 18 is implemented to vibration control work, adjusts the amplitude size, and is divided into following two kinds of situations:
4-6-1) through Programmable Logic Controller 6, analyze relatively judgement: as current feed flow value during lower than the feed flow parameter value set, send the instruction that strengthens current feed flow, strengthen the amplitude of electro-vibrating feeder 18, impel it to rise to the feed flow parameter value of setting;
In addition, for the current feed flow value lower than setting feed flow parameter value, as, exceed under the biased error value of setting on step 3) man-machine interface 9 and prescribe a time limit, will send overproof alerting signal,, in the overproof alarm lamp HL3 of feed flow bright light, audible alarm indicator TL will send the sound thereupon, now, the mute button that pushes for emergency SB3, can eliminate alarm sound;
4-6-2) through Programmable Logic Controller 6, analyze relatively judgement: as current feed flow value during higher than the feed flow parameter value set, send the instruction that reduces current feed flow, reduce the amplitude of electro-vibrating feeder 18, force it to drop to the feed flow parameter value of setting;
In addition, for the current feed flow value higher than setting feed flow parameter value, as, exceed on the biased error value of setting on step 3) man-machine interface 9 and prescribe a time limit, will send overproof alerting signal,, in the overproof alarm lamp HL3 of feed flow bright light, audible alarm indicator TL will send the sound thereupon, now, the mute button that pushes for emergency SB3, can eliminate alarm sound;
4-7) judge and set the feed time: judge whether the feed time value of setting arrives on step 3):
The feed time of 4-7-1) setting does not arrive, and will be back to step 4-1), and repeat step thereafter;
Time is up for the feed of 4-7-2) setting, and enters next step;
4-8) automatically stop feed: electro-vibrating feeder 18 stops feed automatically, and flow accumulation display instrument 13 shows this feed total amount;
4-9) feed macroanalysis judgement: Programmable Logic Controller 6 records to this feed total amount, and relatively judges with the feed total amount parameter of setting on step 3) man-machine interface 9:
As exceed the biased error value upper limit or the lower limit of setting, and all send overproof alerting signal, that is, in the overproof alarm lamp HL4 of feed total amount bright light, audible alarm indicator TL will send the sound thereupon;
As do not exceed the biased error value upper limit or the lower limit of setting, can not send overproof alerting signal;
4-10) finish this feed work, can select to enter next working cycle: or reset the feed parameter, before being back to step 3), and repeat step thereafter; Or, still by the feed parameter operation of having set, before being back to step 4), and repeat step thereafter;
5) powered-down, ends with system work.
Two, manually control method of work, step is as follows:
1) switch on power: though a kind of TT&C system of strip resistance strain-type impact flow meter, in treating duty;
2) select manual control model: at first, in control model, select on button 15, the control model of outwarding winding is selected knob SA1, secondly, at alarm mode, select on button 17, the audible alarm of outwarding winding selects knob SA2, the overproof warning of feed flow to select knob SA3 and the overproof warning of feed total amount to select knob SA4, makes whole TT&C system in manual state of a control, and manually controlled work status indicator lamp HL2 bright light shows, shows to select complete;
3) start the feed button: on feed model selection button 16, press feed start button SB1, batcher auxiliary reclay KA1, flow regulation are used auxiliary reclay KA2, and the two is at once closed, electric and magnetic oscillation is started working to electro-vibrating feeder 18, vibrating controller 19 in material unit 10, and can accept follow-up regulation and control instruction, adjust the feed flow;
4) manual adjustments flow: on manual flow regulation assembly 20, the knob of turn flow regulation potentiometer R, variation by its resistance, regulate the amplitude of electro-vibrating feeder 18, it is the feed flow, and dynamically show the situation of change of its flow on flow accumulation display instrument 13, until determine required feed flow;
5) continue feed according to definite flow: according to the feed flow value after manual adjustments, electro-vibrating feeder 18 continues feed, and on flow accumulation display instrument 13 the current feed flow of real-time dynamic display and feed total amount;
6) close the feed button: on feed model selection button 16, press feed X button SB2, auxiliary reclay KA1, flow regulation the two immediate unlock of auxiliary reclay KA2 for batcher, electro-vibrating feeder 18 stops feed at once, and shows the total amount of this feed at flow accumulation display instrument 13;
7) finish this feed work: can select to enter next working cycle, before being back to step 3), and repeat step thereafter;
8) powered-down, ends with system work.
Below, by Fig. 8 and in conjunction with Fig. 5, Fig. 6, Fig. 7, for an embodiment, illustrate a kind of specific works situation of TT&C system of strip resistance strain-type impact flow meter.
Known that by Fig. 8 embodiment described in the utility model is to add the granular inovulant of trace solid as a specific embodiment while selecting the casting industry casting pouring in molten iron stream.Wherein, the granularity of inovulant used is generally 0.15-0.5mm, and the addition of inovulant used is generally watered in the 0.02-0.05% scope of fluence at molten iron, belongs to the category of low discharge feed.
In addition, according to its molten steel preparation process stipulation, it implement to require: when casting ladle 27 toward in the casting mold sandbox cast gate 25a of casting mold sandbox 25 during pouring molten iron 26, charging gear 33 should add inovulant 32 by y type tee pipe fitting 28 in the molten iron stream of pouring into a mould, and should stipulate the concrete feed time, add feed flow and biased error value (precision) and feed total amount and the biased error value (precision) of inovulant, only in this way, just can play the good result that foundry goods breeds, just can avoid breeding not enough and breed excessively, suppressing spoken parts in traditional operas produces, improve metallographic structure, improve mechanical property, improve casting quality.
Know that by Fig. 8 and in conjunction with Fig. 5 the TT&C system of a kind of strip resistance strain-type impact flow meter described in the utility model has completed and implemented on-the-spot assembling.Wherein, Programmable Logic Controller 6, man-machine interface 9, flow accumulation display instrument 13, system emergency stop switch 14, control model select button 15, feed model selection button 16, alarm mode to select button 17, vibrating controller 19, manual flow regulation assembly 20, duty indication component 21, alerting signal indication component 22, all have been fitted on electrical control cubicles 23; In addition, resistance-strain type impact flow meter 12(is containing strip resistance strain gauge transducer 12a), electro-vibrating feeder 18, be arranged on respectively on the first support and connection plate 31, the second support and connection plate 34 of charging gear 33.
In addition, in the embodiment of Fig. 8, described Programmable Logic Controller 6, be to select Siemens Company's product, and model is S7-300; Described man-machine interface 9, be to select Siemens Company's product, and model is MP37; Described resistance strain type sensor 12a, be to select Xi'an new quick electronics technology company limited product, and model is the 1R1-KL LOAD CELLS, and range is 0.5Kg; Described flow accumulation display instrument 13, be to select Zhuhai Zhi Mei Electronics Co., Ltd. product, and model is CB900K; Described electro-vibrating feeder 18, be the product of selecting Hai'an ten thousand force vibration machinery company limiteds to produce, and model is GZV0.5; Described vibrating controller 19, be to select Beijing Xi Mandun automation research institute product, and model is ZDK00-1.
Separately by Fig. 8 and in conjunction with Fig. 5, Fig. 6, illustrate a kind of course of work of automatic control of TT&C system of strip resistance strain-type impact flow meter:
1) switch on power: though a kind of TT&C system of strip resistance strain-type impact flow meter, in treating duty;
2) select automatic control mode: at first, on electrical control cubicles 23, screwing control model selects the control model on button 15 to select knob SA1, secondly, screwing alarm mode selects the audible alarm on button 17 to select knob SA2, the overproof warning of feed flow to select knob SA3, the overproof warning of feed total amount to select knob SA4, make whole TT&C system in automatic control state, and automatic control working station indicator HL1 bright light show;
3) set the feed parameter: the art of inoculation requirement during according to casting pouring, the feed parameter of inovulant is set on man-machine interface 9, wherein, the feed time of setting is 15s; The feed flow of setting is that 10g/s and biased error value are ± 0.5g, and the higher limit of feed flow is 10.5g/s, and lower limit is 9.5g/s; The feed total amount of setting is 150g and biased error value ± 10g, and the higher limit of feed total amount is 160g, and lower limit is 140g;
4) start the feed button: on electrical control cubicles 23, press the feed start button SB1 on feed model selection button 16, batcher is at once closed with auxiliary reclay KA1, and electric and magnetic oscillation is started working to electro-vibrating feeder 18, vibrating controller 19 in material unit 10;
Now, be arranged in the inovulant 32 of the built-in hopper of charging gear 33 24, effect of vibration by electro-vibrating feeder 18, by way of 35 times drop impacts of material guiding hopper, to the plate face of the groove punching 12b on resistance-strain type impact flow meter 12, and continue to fall in feed leakage bucket 30, subsequently, enter in Y-type three way type pipe fitting 28, and, under the strength of pressing air road assembly 29 is carried, 32 of its inovulants can fly among the molten iron stream 26 while pouring into a mould fast, thereby reach the purpose of molten steel preparation;
When above-mentioned casting pouring, in molten iron stream 26, add in the process of inovulant 32, the TT&C system of described a kind of strip resistance strain-type impact flow meter has completed the following course of work automatically:
4-1) electro-vibrating feeder 18 feeds, and can accept the regulation and control instruction that follow-up Programmable Logic Controller 6 sends, through vibrating controller 19, adjust the amplitude of electro-vibrating feeder 18, adjust the feed flow;
The inovulant 32 that 4-2) electro-vibrating feeder 18 provides, when lower drop impact is upper to the groove punching 12b of resistance-strain type impact flow meter 12, make resistance strain type sensor 12a produce elastic deformation, resistance value changes, and is converted into Voltage-output to flow accumulation display instrument 13;
The resistance-strain signal that 4-3) flow accumulation display instrument 13 is accepted from resistance strain type sensor 12a, carry out the integrating processing, and show current feed flow value, feed total amount value, as, current feed flow value is 9.8g/s, current feed total amount value is 78g, and subsequently, the output analog signals enters the analog input end of Programmable Logic Controller 6;
4-4) enter the analog signals of Programmable Logic Controller 6, compare analysiss, calculation process with the feed parameter value of setting on step 3) man-machine interface 9, with the feed flow be 10g/s and biased error value be ± 0.5g compares analysis, calculation process;
4-5) Programmable Logic Controller 6 is delivered to the analog output end by the controlling value after computing, and is converted into the micro-electric current of direct current 4-20mA and reaches vibrating controller 19;
4-6) current signal of output drives vibrating controller 19, and electro-vibrating feeder 18 is implemented to vibration control work, adjusts the amplitude size, and is divided into following two kinds of situations:
4-6-1) through Programmable Logic Controller 6, analyze relatively judgement: as current feed flow value lower than the feed flow parameter value of setting during as 10g/s, as be 9.6g/s, send the instruction that strengthens current feed flow, strengthen the amplitude of electro-vibrating feeder 18, impel it to rise to the feed flow parameter value 10g/s of setting;
In addition, for the current feed flow value lower than setting feed flow parameter value, as, while exceeding the biased error value lower limit (9.5g/s) of setting on step 3) man-machine interface 9, as be 9g/s, to send overproof alerting signal, that is, and in the overproof alarm lamp HL3 of feed flow bright light, audible alarm indicator TL will send the sound thereupon, now, the mute button that pushes for emergency SB3, can eliminate alarm sound;
4-6-2) through Programmable Logic Controller 6, analyze relatively judgement: as current feed flow value during higher than the feed flow parameter value 10g/s that sets, as 10.3g/s, send the instruction that reduces current feed flow, reduce the amplitude of electro-vibrating feeder 18, force it to drop to the feed flow parameter value 10g/s of setting;
In addition, for the current feed flow value higher than setting feed flow parameter value, as, while exceeding the biased error value upper limit 10.5g/s set on step 3) man-machine interface 9, as be 11g/s, to send overproof alerting signal, that is, and in the overproof alarm lamp HL3 of feed flow bright light, audible alarm indicator TL will send the sound thereupon, now, the mute button that pushes for emergency SB3, can eliminate alarm sound;
4-7) judge and set the feed time: judge whether the feed time value 15s set arrives on step 3):
The feed time of 4-7-1) setting does not arrive, and will be back to step 4-1), and repeat step thereafter;
Time is up for the feed of 4-7-2) setting, and enters next step;
4-8) automatically stop feed: electro-vibrating feeder 18 stops feed automatically, and flow accumulation display instrument 13 shows this feed total amount, as, this actual feed total amount is 154g, is shown as 154g;
4-9) feed macroanalysis judgement: Programmable Logic Controller 6 records to this feed total amount 154g, and compares and analyze judgement with the feed total amount 150g set on step 3) man-machine interface 9 and biased error value ± 10g:
As exceed the biased error value upper limit or the lower limit (upper limit 160g, lower limit 140g) of setting, and all send overproof alerting signal, that is, in the overproof alarm lamp HL4 of feed total amount bright light, audible alarm indicator TL will send the sound thereupon;
As do not exceed the biased error value upper limit or the lower limit of setting, can not send overproof alerting signal;
Because this feed total amount is 154g, do not exceed the biased error value upper limit of setting, therefore can not send overproof alerting signal;
4-10) finish this feed work, can select to enter next working cycle: or reset the feed parameter, before being back to step 3), and repeat step thereafter; Or, still by the feed parameter operation of having set, before being back to step 4), and repeat step thereafter;
5) powered-down, ends with system work.
Separately by Fig. 8 and in conjunction with Fig. 5, Fig. 7, illustrate a kind of course of work of manual control of TT&C system of strip resistance strain-type impact flow meter:
1) switch on power: though a kind of TT&C system of strip resistance strain-type impact flow meter, but in duty;
2) select manual control model: at first, on electrical control cubicles 23, the control model of outwarding winding selects the control model on button 15 to select knob SA1, secondly, the alarm mode of outwarding winding selects the audible alarm on button 17 to select knob SA2, the overproof warning of feed flow to select knob SA3, the overproof warning of feed total amount to select knob SA4, make whole TT&C system in manual state of a control, and manually controlled work status indicator lamp HL2 bright light show;
3) start the feed button: on electrical control cubicles 23, press the feed start button SB1 on feed model selection button 16, batcher auxiliary reclay KA1, flow regulation are used auxiliary reclay KA2, and the two is at once closed, electric and magnetic oscillation is started working to electro-vibrating feeder 18, vibrating controller 19 in material unit 10, and can accept follow-up regulation and control instruction, adjust the feed flow;
4) manual adjustments flow: on manual flow regulation assembly 20, the knob of turn flow regulation potentiometer R, variation by its resistance, regulate the amplitude of electro-vibrating feeder 18, i.e. feed flow, and dynamically show the situation of change of its flow on flow accumulation display instrument 13, until determine required feed flow, as, still above example is example, determines that the feed flow is 10g/s;
5) continue feed according to definite flow: according to the feed flow value (as 10g/s) after manual adjustments, electro-vibrating feeder 18 continues feed, and on flow accumulation display instrument 13 the current feed flow of real-time dynamic display and feed total amount;
6) according to closing the feed button: according to the required feed time, as 15s, as on electrical control cubicles 23, press the feed X button SB2 on feed model selection button 16, auxiliary reclay KA1, flow regulation the two immediate unlock of auxiliary reclay KA2 for batcher, electro-vibrating feeder 18 stops feed at once, and show the total amount of these feeds at flow accumulation display instrument 13, as, this actual feed total amount is 142g, is shown as 142g;
7) finish this feed work: can select to enter next working cycle, before being back to step 3), and repeat step thereafter;
8) powered-down, ends with system work.
It should be noted that, manually control general only for the use of the debugging of TT&C system, or the interim emergency processing occasion when control section breaks down automatically.In addition, the application of manual control part, should be after manually adjusting definite feed flow, can drop into practical application, molten steel preparation embodiment during foregoing casting pouring, should, after the feed flow is adjusted to 10g/s by flow regulation potentiometer R, can be used.
Identical with aforementioned automatic control: during manual mode operation, its inovulant 32 is also the effect of vibration by electro-vibrating feeder 18, after material guiding hopper 35, resistance-strain type impact flow meter 12, feed leakage bucket 30, enter in Y-type three way type pipe fitting 28, and under the strength of pressing air road assembly 29 is carried, can fly to fast among the molten iron stream 26 while pouring into a mould, realize the purpose that breeds to foundry goods.
Different from aforementioned automatic control: during manual mode operation, for analysis judgement processing, the online Real-time Feedback adjustment between actual feed flow and setting feed flow, its TT&C system is no longer carried out, and the accuracy of feed discharge uniformity and feed total amount also is difficult to guarantee; In addition, the feed basis of time is artificially manual, can not automatically control according to the time of setting.
The utility model resistance strain type sensor 12a used, be an existing known products, mainly resistance strain gage, elastic body and testing circuit three parts, consists of, and wherein, semi-girder is its elastic body (sensitive element).Principle of work is: under the effect of external force, semi-girder produces elastic deformation, and make the resistance strain gage (conversion element) of pasting on it be out of shape thereupon, be that the resistance strain gage resistance will change, through corresponding metering circuit, this variation is converted to electric signal again, thereby completes the process of external force transforms electrical signals.
By Fig. 5, known, the utility model resistance-strain type impact flow meter 12 used mainly comprises: resistance strain type sensor 12a, groove punching 12b, spill punching support 12c, boss pedestal 12d, base plate 12e; Wherein, the soldered back side at groove punching 12b of spill punching support 12c, cantilever one end of resistance strain type sensor 12a, by securing member and spill punching support 12c, connect firmly, the other end of cantilever, by securing member and boss pedestal 12d, connect firmly, and boss pedestal 12d connects firmly on base plate 12e by securing member again.The course of work is: when material 2 falls on groove punching 12b, by spill punching support 12c, force its resistance strain type sensor 12a to produce elastic deformation, and its resistance variations signal is converted to electric signal, reach flow accumulation display instrument 13 and carry out the integrating demonstration, analyze relatively, judge and process by Programmable Logic Controller 6, thereby reach the purpose that mass flow is measured.
For open the purpose of this utility model in this paper embodiment selected embodiment, current think suitable, but it should be noted that the utility model is intended to comprise that all belong to all changes and the improvement of the embodiment in this design and the utility model scope.
Claims (1)
1. the TT&C system of a strip resistance strain-type impact flow meter, it is characterized in that: described TT&C system comprises: Programmable Logic Controller (6), flow detection module (7), switching input module (8), man-machine interface (9), electric and magnetic oscillation feed module (10) and switching value output module (11); Described Programmable Logic Controller (6) comprises switching value control circuit and analog quantity control circuit; The input end of described analog quantity control circuit is connected with flow detection module (7), and the output terminal of analog quantity control circuit is connected with electric and magnetic oscillation feed module (10); The input end of described switching value control circuit is connected with switching input module (8), and the output terminal of described switching value control circuit is connected with switching value output module (11); Described man-machine interface (9), be connected with Programmable Logic Controller (6).
2, the TT&C system of a kind of strip resistance strain-type impact flow meter according to claim 1 is characterized in that: described flow detection module (7) comprising: resistance-strain type impact flow meter (12), flow accumulation display instrument (13) and the automatically controlled circuit configured; In in described resistance-strain type impact flow meter (12), the resistance strain type sensor (12a) of band is connected with the analog quantity control circuit input end of Programmable Logic Controller (6) by flow accumulation display instrument (13).
3, the TT&C system of a kind of strip resistance strain-type impact flow meter according to claim 1 is characterized in that: described switching input module (8) comprising: the automatically controlled circuit that system emergency stop switch (14), control model select button (15), feed model selection button (16), alarm mode to select button (17) and configure; Described system emergency stop switch (14) is a system scram button ST; It is that a control model is selected knob SA1 that described control model is selected button (15), and wherein, " screwing " is for selecting; Described feed model selection button (16) comprises a feed start button SB1 and a feed X button SB2; Described alarm mode selects button (17) to comprise an audible alarm selection knob SA2, ann silence button SB3, the overproof warning selection knob SA3 of feed flow and the overproof warning selection of a feed total amount knob SA4.
4, the TT&C system of a kind of strip resistance strain-type impact flow meter according to claim 1 is characterized in that: described electric and magnetic oscillation feed module (10) comprising: electro-vibrating feeder (18), vibrating controller (19) and the automatically controlled circuit configured; Described electro-vibrating feeder (18), be connected with the analog output end of Programmable Logic Controller (6) by vibrating controller (19), and be connected with the switching value output terminal of Programmable Logic Controller (6) by auxiliary reclay KA1, the automatically controlled circuit that configures.
5, the TT&C system of a kind of strip resistance strain-type impact flow meter according to claim 1 is characterized in that: described switching value output module (11) comprising: manual flow regulation assembly (20), duty indication component (21), alerting signal indication component (22) and the automatically controlled circuit configured; Described manual flow regulation assembly (20) is a flow regulation potentiometer R, and the automatically controlled circuit of using auxiliary reclay KA2 and configuring by flow regulation, with the input end of vibrating controller (19), links; Described duty indication component (21) comprises an automatic control working station indicator HL1 and a manually controlled work status indicator lamp HL2; Described alerting signal indication component (22) comprises an audible alarm indicator TL, an overproof alarm lamp HL3 of feed flow and an overproof alarm lamp HL4 of feed total amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220125892 CN202956668U (en) | 2012-03-30 | 2012-03-30 | Measurement and control system with resistance strain type impact flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220125892 CN202956668U (en) | 2012-03-30 | 2012-03-30 | Measurement and control system with resistance strain type impact flowmeter |
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| CN202956668U true CN202956668U (en) | 2013-05-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621999A (en) * | 2012-03-30 | 2012-08-01 | 中国一拖集团有限公司 | Measurement and control system with resistance strain type impact flowmeter and working method |
| CN105094157A (en) * | 2014-05-15 | 2015-11-25 | 北新集团建材股份有限公司 | Material flow meter, and control system for powder material flow and control method thereof |
-
2012
- 2012-03-30 CN CN 201220125892 patent/CN202956668U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621999A (en) * | 2012-03-30 | 2012-08-01 | 中国一拖集团有限公司 | Measurement and control system with resistance strain type impact flowmeter and working method |
| CN102621999B (en) * | 2012-03-30 | 2015-03-25 | 中国一拖集团有限公司 | Measurement and control system with resistance strain type impact flowmeter and working method |
| CN105094157A (en) * | 2014-05-15 | 2015-11-25 | 北新集团建材股份有限公司 | Material flow meter, and control system for powder material flow and control method thereof |
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