CN204314739U - A kind of capacitive displacement tank level control system based on LabVIEW - Google Patents
A kind of capacitive displacement tank level control system based on LabVIEW Download PDFInfo
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- CN204314739U CN204314739U CN201420777129.9U CN201420777129U CN204314739U CN 204314739 U CN204314739 U CN 204314739U CN 201420777129 U CN201420777129 U CN 201420777129U CN 204314739 U CN204314739 U CN 204314739U
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Abstract
The utility model relates to a kind of capacitive displacement tank level control system based on LabVIEW, its composition comprises: molten steel holds clamping device, hold on clamping device at described molten steel and be provided with capacitance displacement sensor, described molten steel holds clamping device and capacitance displacement sensor connection mode successively/number conversion module, PC/LabVIEW program module, jointly forms closed loop automatic control system.Beneficial effect is: adopt Non-Contact Displacement Capacitance Sensor to measure liquid level, do not contact molten steel, and liquid level flowing, fluctuation or oxidation floating thing all do not affect measurement; The utility model has that measuring accuracy is high, stable performance, structure is simple, easy to assemble, cost is low advantage; And the amorphous thin ribbon thickness utilizing this utility model to prepare is even, density is high and soft magnet performance is good.
Description
Technical field
The utility model relates to a kind of tank level control system, particularly relates to a kind of capacitive displacement tank level control system based on LabVIEW, belongs to thing position control field.
Background technology
Non-crystaline amorphous metal has the excellent soft magnetic characteristic such as high saturated magnetic induction, high magnetic permeability, low-coercivity, low-loss, amorphous thin ribbon is widely used in power domain such as dispensing transformer, amorphous motor etc., amorphous transformer, with its energy-saving low-carbon, environmental protection and being approved by power industry, is the optimal selection replacing tradition directed silicon steel transformer.
At present, the amorphous that automatic controlling level is higher gets rid of carrying device and mostly is foreign-made.The amorphous of FDAC metal company, nano-crystalline thin ribbon occupy nearly 70% of home market share, in recent years, domestic priority emerges many ton amorphous band production lines, this has broken the passive situation of amorphous thin ribbon dependence on import to a certain extent, but the automatic control level of amorphous thin ribbon production domesticization is not high, and strip quality and stability all exist very large gap with FDAC.
The preparation of amorphous thin ribbon adopts rapid solidification planar flow casting technology for making, and be ejected on the chill roll of High Rotation Speed by high-temperature molten steel, cooldown rate is up to 10
6dEG C/s.This technique shortens to diameter only on the cooling roll surface of about a meter long flow process silicon steel rolling mill practice, and the factor of all restriction strip performances is by more complicated difficult control.The series of parameters such as liquid level and expulsion pressure will have influence on amorphous thin ribbon thickness, lateral thickness difference, surface quality, density and lamination coefficient, and then directly have influence on structural design, the soft magnet performance of amorphous transformer core and produce efficiency in batches.
High-quality amorphous thin ribbon and molten steel liquid level height closely related, stable liquid level is the uniform necessary condition of amorphous strip thickness.External existing technique makes up the change of expulsion pressure by inertia air pressure in adjustment sealed-in nozzles bag, but regulates inertia air pressure high to equipment precision requirement, and molten steel injects difficulty, and discharge is not easy to control.The method maintaining permanent liquid level has multiple, usually has contact and contactless.Magnetic float contact sensor measurement is limited in scope, and magnetic material is often because high-temperature severe environment can not play a role; Infrared, laser sensor and X ray commercial measurement precision high, but this kind equipment is very high to environmental requirement, and antijamming capability is low, expensive, limits its application in molten steel liquid level is measured.Current domestic Amorphous Wide Ribbon all adopts gravity to spray band, but not inert gas pressure spray band.With higher expulsion pressure, US Patent No. 4331739 discloses prepares that cross-sectional area is consistent, the uniform strip of thickness, this measure compensate for the restriction of below 0.3mm spray seam to molten steel steady flow to a certain extent.Chinese patent application notification number CN 102974788 A by upper and lower spacing proximity switch by Liquid level within the scope of 50mm.Can affect lever transmission ratio after stopper and molten steel outlet brinelling, these Recessive elementS finally can have influence on the control of liquid level.This is practical newly must regulate the moving components such as stopper hoistable platform at any time, arranges the appropriate ratio of lever transmitting range, can control liquid level after the coupling of system each position.Chinese patent application notification number CN102389952 A and CN 202461467 U, by visual inspection liquid level, manually boots cylinder solenoid valve, is controlled at 400-450mm, and spray band constant pressure is at 0.3-0.4Kg/cm
2, thickness is even, and density is high.This is practical does not newly save manual control, can not get rid of artificial uncertain factor under high temperature heat radiation environment to the impact of liquid level.Need particularly point out, above-mentioned practical new Liquid level is in 50mm wide region, and this is limited to the thickness evenness of control strip.
Utility model content
The deficiency that the utility model exists for above-mentioned existing technologies, provides a kind of capacitive displacement tank level control system based on LabVIEW.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of capacitive displacement tank level control system based on LabVIEW, its composition comprises: molten steel holds clamping device, hold on clamping device at described molten steel and be provided with capacitance displacement sensor, described molten steel holds clamping device and capacitance displacement sensor connection mode successively/number conversion module, PC/LabVIEW program module, realizes closed-loop automatic control by human-computer interaction interface.
The described capacitive displacement tank level control system based on LabVIEW, described molten steel holds clamping device and comprises: tundish, described tundish is connected with nozzle bag, the below of the BN nozzle of described nozzle bag is provided with and chill roll, self-oiling bearing is provided with above described tundish, buffer spring and crossbeam, described crossbeam two ends are connected with two cylinders, described crossbeam is connected with stopper, described stopper is placed in the cavity of described tundish downwards, the both sides of stopper described in the cavity of described tundish arrange six silicon carbon-point or more Elemas, described capacitance displacement sensor is arranged on the top of nozzle bag, ceramic buoy is provided with below described capacitance displacement sensor, described ceramic buoy swims on the molten steel in nozzle bag, unhurried current platform is provided with in the cavity of described nozzle bag, described unhurried current platform is arranged on more than liquid level.
The described capacitive displacement tank level control system based on LabVIEW, mould/number conversion module is data collecting card or the digital display instrument with Serial Port Transmission function, or PLC programmable logic control system.
The described capacitive displacement tank level control system based on LabVIEW, data collecting card have can with the physical port of interprogram communication, digital display instrument (table) has RS-232 serial line interface or RS-485 turns RS-232 serial ports, has change and send function.
The described capacitive displacement tank level control system based on LabVIEW, writes LabVIEW liquid level monitoring program as requested, and LabVIEW program is by after liquid level digital graphics, and PC shows liquid level exact height, and program has bound liquid level warning light warning function.
The beneficial effects of the utility model are:
1. adopt Non-Contact Displacement Capacitance Sensor to measure liquid level, do not contact molten steel, liquid level flowing, fluctuation or oxidation floating thing all do not affect measurement; The utility model has that measuring accuracy is high, stable performance, structure is simple, easy to assemble, cost is low advantage.
2. improve amorphous thin ribbon quality, improve product competitiveness and production efficiency, improve the security of operating personnel simultaneously and reduce labour intensity; Capacitive displacement measuring accuracy is high, and liquid fluctuating is little, if do not consider liquid fluctuating, liquid level can be stabilized in the even less variation range of 10mm, and expulsion pressure can control at 0.1Kg/cm
2in scope; Amorphous thin ribbon surface-brightening, " scalelike mark " is not obvious; Strip average thickness 20-25 μm, lateral thickness difference about 2 μm; Density increases, and lamination coefficient brings up to 0.85-0.9; Achieve liquid level digitizing and visual, the sensing and the computing machine that complete liquid level control; LabVIEW program can expand instrumental function, and the self-defined accurate measurement carrying out small, difficult survey physical quantity, saves time of product development simultaneously, and can save instrument and computer hardware input to greatest extent; Operating personnel free from high-temperature severe environment, faced by be no longer high temperature intense radiation molten steel, but man-machine interface.This utility model is also widely used in the thing position in the fields such as metallurgy, petrochemical complex, water conservancy and hydropower, mining controls simultaneously.
Accompanying drawing explanation
Fig. 1 is Liquid level process flow diagram of the present utility model;
Fig. 2 is the structural representation that molten steel holds clamping device.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
A kind of capacitive displacement tank level control system based on LabVIEW, its composition comprises: molten steel holds clamping device 5, hold on clamping device at described molten steel and be provided with capacitance displacement sensor 1, described molten steel holds clamping device and capacitance displacement sensor connection mode successively/number conversion module 2, PC/LabVIEW program module 3, realizes closed-loop automatic control by human-computer interaction interface 4.
The described capacitive displacement tank level control system based on LabVIEW, described molten steel holds clamping device and comprises: tundish 12, described tundish is connected with nozzle bag 13, the below of the BN nozzle 16 of described nozzle bag is provided with and chill roll 17, self-oiling bearing 7 is provided with above described tundish, buffer spring 9 and crossbeam 8, described crossbeam two ends are connected with two cylinders 10, described crossbeam is connected with stopper 6, described stopper is placed in the cavity of described tundish downwards, the both sides of stopper described in the cavity of described tundish arrange six silicon carbon-point 11 or more Elemas, described capacitance displacement sensor is arranged on the top of nozzle bag, ceramic buoy 18 is provided with below described capacitance displacement sensor, described ceramic buoy swims on the molten steel in nozzle bag, unhurried current platform 14 is provided with in the cavity of described nozzle bag, described unhurried current platform is arranged on liquid level more than 15.
The described capacitive displacement tank level control system based on LabVIEW, mould/number conversion module is data collecting card or the digital display instrument with Serial Port Transmission function, or PLC programmable logic control system.
The described capacitive displacement tank level control system based on LabVIEW, data collecting card have can with the physical port of interprogram communication, digital display instrument (table) has RS-232 serial line interface or RS-485 turns RS-232 serial ports, has change and send function.
The described capacitive displacement tank level control system based on LabVIEW, writes LabVIEW liquid level monitoring program as requested, and LabVIEW program is by after liquid level digital graphics, and PC shows liquid level exact height, and program has bound liquid level warning light warning function.
A kind of capacitive displacement tank level control system based on LabVIEW, capacitance displacement sensor is by the electric signal of reflection liquid level, be transferred to the LabVIEW program of PC, LabVIEW program is by liquid level digitizing and visual, operating personnel carry out Liquid level by man-machine interface, when the man-machine interface display liquid level of PC screen is close to pre-determined lower limit, starts cylinder and open stopper, in nozzle bag, supplement molten steel in time; When showing liquid level close to preset upper limit, close stopper, stop supplementing molten steel, after cyclic brake, liquid level is tending towards constant, and the sensing and the computing machine that complete liquid level control.
It is heat-resisting steel that molten steel holds brake portion enclosure material, and inner bag is graphite, intermediate course filling fire resisting material.Be respectively equipped with orifice up and down and portal, orifice place is provided with and connects molten steel funnel, establishes unhurried current step in nozzle bag unique distinction is, unhurried current step can reduce the impact of molten steel to liquid level effectively, and liquid fluctuating reduces, and molten steel expulsion pressure is tending towards constant.In addition, the existence of unhurried current step occupies the area of effective liquid level, and molten steel heat radiation is lost temperature and reduced.
Molten steel supplements brake portion and comprises fine graphite stopper, symmetrical high temperature-resistant cylinder and snubber assembly.Stopper material is fine graphite, and caput is hemispherical, and contracts out steel circular hole with nozzle and grind and assemble, to ensure that molten steel can not from gap spill and leakage.Symmetrical fixing high temperature-resistant cylinder (or servomotor), moved up and down by solenoid control cylinder piston, cylinder piston is connected with crossbeam, and the crossbeam be nested in self-oiling bearing drives stopper control MOLTEN STEEL FLOW and supplements.Drive high temperature-resistant cylinder stroke adjustable and there is pooling feature, suitable in order to make stopper and tapping circular hole compress dynamics, on crossbeam pillar, installed buffer spring in addition, the coupling of cylinder buffering pad and buffer spring prevents stopper and tundish from damaging because strongly clashing into fast.For to molten steel heating and thermal insulation, be conducive to molten steel and leave standstill and insulation, in nozzle bag and tundish, have electric heating Elema.The mother alloy melt of employing vaccum sensitive stove refining is disposable or inject tundish at twice, improves the mode of intermittently tumbling.Tundish and nozzle inclusion there is cover plate to be incubated further.Because not needing artificially to observe liquid level, without the need to leaving viewport, only there are note steel circular hole and sound wave through hole.
Liquid level part comprises signals collecting part, analog quantity receiver module, PC, LabVIEW level monitoring program.Capacitance displacement sensor measuring accuracy is high, and repeatable accuracy is less than 1mm.The physical signalling of height of liquid level is converted into analog electric signal and exports by sensor.Analog quantity receiver module turns RS-232 simulating signal by RS-232 serial ports or RS-485 and accesses PC, analog signals receiver module is data collecting card (NI capture card), or there is the digital display instrument (digital display meter) of serial ports, or PLC FPGA (Field Programmable Gate Array) automatic control system.First consider the data collecting card that economic input is little or digital display instrument, if there is the necessity realizing Automated condtrol completely, can consider to use PLC automatic control equipment.LabVIEW program gathers simulating signal by capture card passage or by configuration RS-232 serial ports, and simulating signal is converted to digital signal, by becoming the digital signal sent and export as reflecting liquid level.LabVIEW is the industrial standard graphic programming platform of National Instruments's exploitation, realizes liquid level digitizing and visual by the LabVIEW program on platform.Operator carrys out level monitoring control liquid level easily by visualization interface.LabVIEW liquid level monitoring program has warning function, when liquid level exceed or lower than setting critical altitude time, alarm lamp is bright, and hummer rings, and alert is closed or opened stopper, stops in time or supplementary molten steel.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. the capacitive displacement tank level control system based on LabVIEW, its composition comprises: molten steel holds clamping device, it is characterized in that, hold on clamping device at described molten steel and be provided with capacitance displacement sensor, described molten steel holds clamping device and capacitance displacement sensor connection mode successively/number conversion module, PC/LabVIEW program module, realizes closed-loop automatic control by human-computer interaction interface.
2. according to claim 1 based on the capacitive displacement tank level control system of LabVIEW, it is characterized in that: described molten steel holds clamping device and comprises: tundish, described tundish is connected with nozzle bag, the below of the BN nozzle of described nozzle bag is provided with and chill roll, self-oiling bearing is provided with above described tundish, buffer spring and crossbeam, described crossbeam two ends are connected with two cylinders, described crossbeam is connected with stopper, described stopper is placed in the cavity of described tundish downwards, the both sides of stopper described in the cavity of described tundish arrange six silicon carbon-point or more Elemas, described capacitance displacement sensor is arranged on the top of nozzle bag, ceramic buoy is provided with below described capacitance displacement sensor, described ceramic buoy swims on the molten steel in nozzle bag, unhurried current platform is provided with in the cavity of described nozzle bag, described unhurried current platform is arranged on more than liquid level.
3. according to claim 1 based on the capacitive displacement tank level control system of LabVIEW, it is characterized in that: mould/number conversion module is data collecting card or the digital display instrument with Serial Port Transmission function, or PLC programmable logic control system.
4., according to claim 3 based on the capacitive displacement tank level control system of LabVIEW, it is characterized in that: data collecting card have can with the physical port of interprogram communication, digital display instrument has RS-232 serial line interface or RS-485 turns RS-232 serial ports, has change and send function.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033203A (en) * | 2015-06-26 | 2015-11-11 | 苏州洲盛非晶科技有限公司 | Control device of non-crystalloid flimsy alloy machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033203A (en) * | 2015-06-26 | 2015-11-11 | 苏州洲盛非晶科技有限公司 | Control device of non-crystalloid flimsy alloy machine |
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