CN204679109U - A kind of electrothermal front bed electrode condition and slag density measuring equipment - Google Patents
A kind of electrothermal front bed electrode condition and slag density measuring equipment Download PDFInfo
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- CN204679109U CN204679109U CN201520300223.XU CN201520300223U CN204679109U CN 204679109 U CN204679109 U CN 204679109U CN 201520300223 U CN201520300223 U CN 201520300223U CN 204679109 U CN204679109 U CN 204679109U
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- 239000002893 slag Substances 0.000 title claims abstract description 48
- 238000006243 chemical reaction Methods 0.000 claims abstract description 55
- 238000004070 electrodeposition Methods 0.000 claims abstract description 29
- 238000005303 weighing Methods 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 69
- 238000003860 storage Methods 0.000 claims description 68
- 229910001220 stainless steel Inorganic materials 0.000 claims description 24
- 229920002545 silicone oil Polymers 0.000 claims description 23
- 239000010935 stainless steel Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 19
- 239000000725 suspension Substances 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 2
- 238000010310 metallurgical process Methods 0.000 abstract description 2
- 230000007812 deficiency Effects 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 239000000523 sample Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 27
- 239000000463 material Substances 0.000 description 25
- 239000010964 304L stainless steel Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 229910001208 Crucible steel Inorganic materials 0.000 description 6
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/144—Power supplies specially adapted for heating by electric discharge; Automatic control of power, e.g. by positioning of electrodes
- H05B7/148—Automatic control of power
- H05B7/152—Automatic control of power by electromechanical means for positioning of electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The utility model provides a kind of electrothermal front bed electrode condition and slag density measuring equipment, belongs to metallurgical process detection field.Pick-up unit described in the utility model comprises: linkage, thing position-pressure conversion device, weighing device, change send and data processing equipment, servicing unit; May be used for measuring the density of the electrode position height of electrothermal front bed, electrode length and slag simultaneously, and provide electrode to touch end warning function.Device described in the utility model can conform, and temperature is high, dust is serious, the measuring multiple parameters of the electrothermal front bed of the easy adhesion probe of fine particle, existing Level measurement instrument and the inconvenient deficiency of carrying out electrothermal front bed parameter on-line checkingi of Density Detection instrument can be overcome, for the automatic measurement of electrothermal front bed multiparameter and the automatic control that realizes electrothermal front bed provide reliable technological means, the utility model also goes for the similar industrial process of other bad environments.
Description
Technical field
The utility model provides a kind of electrothermal front bed electrode condition and slag density measuring equipment, belongs to metallurgical process detection field.
Background technology
Electrothermal front bed is the large-scale key equipment during Non-ferrous Metallurgy is produced, electrothermal front bed process be smelting furnace export metal sulfonium, it is powered by special three-phase transformer, changed the size of electrode current by the degree of depth regulating electrode to insert molten bath, thus control the temperature of slag and the state of slag.Because the slag height of electrothermal front bed and slag pattern alter a great deal, cause three-phase current unbalance phenomenon serious, cause output power factor to reduce, harmonic content increases, and all can bring totally unfavorable impact to normal production and transformer safety.In order to keep, three-phase balance is stable, temperature stabilization, allows slag, metal obtain good separation, protection transformer security of operation, extends electrothermal front bed serviceable life.In actual process controls, the position height generally by controlling three-phase electrode controls insertion depth, thus controls three-phase current and slag temperature, makes the metal sulfonium in electrothermal front bed be in desirable physical and chemical state.
Constantly be consumed because electrothermal front bed three-phase electrode inserts in high-temperature slag, therefore length, electrode position height, the slag density of real-time detecting electrode, for realizing the Effec-tive Function of electrothermal front bed and automatically controlling very important, but from existing correlation technique, still come with some shortcomings to some extent.Patent 200920094828.2 introduces a kind of electrode position detecting device of arc furnace, this pick-up unit comprises the electrode in electric arc furnaces, roller, photoelectric encoder, computing machine, hydraulic system, photoelectric encoder is driven to rotate by roller, by photoelectric encoder, the angular transition that roller rotates is become pulse digital signal, by aligning, reciprocal umber of pulse calculates, thus obtain the physical location of electrode, the method is simple, easy, but come with some shortcomings, be mainly manifested in: (1) roller is easy to occur skidding, make calculate position and physical location deviation larger, (2) when pulsed frequency is higher, easily there is the miss counter of paired pulses in computing machine, thus causes cumulative errors, (3) when having a power failure or photoelectric coder breaks down, if electrode is still moving, then cannot carry out position tracking, needing again to demarcate, (4) also need again to demarcate when electrode is changed or overhauled, (5) electrode position demarcating steps is complicated, and labour intensity is large.
The Detection & Controling of electrode position height, electrode length, slag density are the Focal point and difficult points of electrothermal front bed observing and controlling.Because electrothermal front bed environment temperature is high, dust large, flue dust adheres to serious, adopt the current Level measurement instrument such as radar levelmeter, ultrasonic material level meter to be difficult to the detection adapting to electrode position and electrode length for a long time, the fast-changing tracking measurement of electrode position can not be adapted to.
Summary of the invention
The purpose of this utility model is to provide a kind of electrothermal front bed electrode condition and slag density measuring equipment, and described pick-up unit comprises linkage, thing position-pressure conversion device, becomes and send and data processing equipment, weighing device;
Described linkage comprises travelling block 6, stainless steel cord 7, fixed pulley I 8, fixed pulley II 9, wirerope lasso 10; One end of stainless steel cord 7 is fixed on by wirerope lasso 10 on the wirerope of windlass 17, and be connected across on fixed pulley II 9, fixed pulley I 8 and travelling block 6 respectively in the middle of stainless steel cord 7, the other end is fixed on travelling block 6;
Thing position-pressure conversion device comprises: small hose 3, soft pipeloop 4, liquid storage bottle 5, sealing bolt 14; The lower end of travelling block 6 hangs with liquid storage bottle 5, and one end of small hose 3 is connected with liquid storage bottle 5, and the other end is connected with pressure unit 2, and the center section of small hose 3 is turned shape, forms soft pipeloop 4; Be full of silicone oil 12 in liquid storage bottle 5 and sealed by sealing bolt 14, liquid storage bottle 5 is provided with liquid storage bottle suspension ring 13, is connected between liquid storage bottle suspension ring 13 with travelling block 6 for living.
Change send and data processing equipment comprises main frame 1, pressure unit 2, and main frame 1 is connected with pressure unit 2;
Weighing device comprises main frame 1, force snesor 15, load-bearing lever 16, balance pivot 17.Main frame 1 is connected with force snesor 15, and force snesor 15 is connected with one end of load-bearing lever 16; The other end of load-bearing lever 16 is connected with fixed pulley III 20, and load-bearing lever 16 is positioned on balance pivot 17; Fixed pulley III 20, fixed pulley IV 21, electric windlass 22 are connected with electrode 23 by rope, by lever by the weight transmitting of electrode to force snesor 15, the signal of force snesor 15 sends into main frame 1, can calculate the weight of electrode.
Described small hose 3, soft pipeloop 4, liquid storage bottle 5, travelling block 6 are positioned at the inside of sleeve 11.
The upper end of described liquid storage bottle 5 is provided with liquid storage bottle suspension ring 13 and sealing bolt 14, and silicone oil 12 is equipped with in the inside of liquid storage bottle 5.
Described balance pivot 17 by axle 19 two ends respectively connection bearing 18 form, by the effect of bearing 18, weighing device elimination of level acting force, on the impact of force snesor 15, only retains electrode weight to the effect of force snesor 15.
Electrothermal front bed electrode condition described in the utility model and slag density measuring equipment are used for the method for potential electrode position height (described electrode position height refers to the distance bottom electrode upper end to electrothermal front bed):
Stainless steel cord 7 is by the synergy of the gravity such as liquid storage bottle 5 and travelling block 6, be in tension always, and its displacement equals the displacement of system for winding engine cable, stainless steel cord 7 draws liquid storage bottle 5 VTOL (vertical take off and landing), the lifting distance of liquid storage bottle 5 equals 1/3rd of rise fall of electrodes distance, the signal of pressure unit 2 sends into main frame 1, can calculate the displacement of electrode.
By linkage and thing position-pressure conversion device, the change that the change of the position height of electrode is converted to silicone oil pressure (is made position height variable quantity and the proportional relation of electrode position high variable quantity of liquid storage bottle 5, and the proportional relation of liquid height of the pressure of the silicone oil 12 that pressure unit 2 detects and liquid storage bottle 5, so just the change in location of electrode can be converted to the pressure change of silicone oil 12), measured by pressure unit 2 pairs of silicone oil 12 pressure, and export the current signal be directly proportional to pressure, current signal is sent into main frame 1 and is processed, electrode position height can be calculated, the computing formula of electrode position height is:
H＝H
0-K(N
1-N
10)
Wherein, H is electrode position height, the distance namely bottom electrode upper end to electrothermal front bed; H
0for original electrodes position height, distance when namely electrode base touches bottom electrothermal front bed bottom electrode upper end to electrothermal front bed; K
hfor height coefficient, can by suitable traveling electrode distance, by H and N
1value calculates and obtains, and such as, as electrode position Level Change Δ H, the real-time A/D conversion value knots modification of pressure is Δ N, then K
h=-Δ H/ Δ N; N
10for the A/D conversion value at zero point of pressure, the A/D conversion value of pressure channel when namely electrode is put into bottom electrothermal front bed; N is the real-time A/D conversion value of pressure.
Three of the purpose of this utility model is to provide described electrothermal front bed electrode condition and slag density measuring equipment for the method for potential electrode length:
Fixed pulley III 20 is arranged on load-bearing lever 16, the weight of electrode passes to force snesor 15 by lever principle, the mV voltage signal that force snesor 15 exports is directly proportional to acting force, mV voltage signal is sent into main frame 1 and is carried out amplification and A/D conversion, and calculate electrode length according to A/D conversion value, the computing formula of electrode length is:
L＝K
LK
w(N
20-N
2)/1000
Wherein, L is the length of electrode; K
lfor length factor (K
lassay method be: when electrode length change Δ L time, the real-time A/D conversion value knots modification of weight signal is Δ N, then K
l=-1000K
wΔ L/ Δ N); K
wfor the line density (K of electrode
wequal the gross mass of electrode divided by total length); N
2for the real-time A/D conversion value of weight signal; N
20for the A/D conversion value at zero point of electrode weight signal, the A/D conversion value of its weight signal when namely electrode is put into bottom electrothermal front bed.
Four of the purpose of this utility model is to provide described electrothermal front bed electrode condition and slag density measuring equipment for measuring the method for electrothermal front bed slag density:
Utilize the changing value of electrode position height and the changing value of electrode weight that obtain in rise fall of electrodes process, calculate the density of slag, slag density calculation formula is:
d＝△W/S△H
△W＝K
w(N
21-N
22)
Wherein, d is the density of slag, and △ W is the weight change value before and after electrode moves, and S is the cross-sectional area of electrode, and △ H is the position height difference before and after electrode moves, K
wfor the line density of electrode, N
21for electrode move before weight A/D conversion value, N
22weight A/D conversion value after electrode moves.
Five of the purpose of this utility model is to provide described electrothermal front bed electrode condition and slag density measuring equipment to touch the method at the end for measuring electrothermal front bed electrode, it is characterized in that: in electrode moving process, constantly the current weight value of electrode is compared with gravimetric value before, if difference change be greater than setting value (power taking extremely just touch the end time weight measurement as setting value), namely think that electrode touches the end, and in time warning is made to the tactile end.
The beneficial effects of the utility model are:
(1) measure in real time the position height of electrothermal front bed electrode, for rise fall of electrodes in metallurgical production process manual operation or automatically control to provide important data;
(2) electrothermal front bed electrode length is measured in real time, for the state of the Expenditure Levels and electrode of understanding electrode in time provides important data;
(3) measure slag density in real time, the situation of slag can be grasped in time, for the operation of electrothermal front bed provides foundation;
(4) whether automatic decision electrode touches the end, and makes warning in time, thus when avoiding electrode to touch the end, windlass is still transferred and causes the accident;
(5) existing Level measurement equipment can be overcome be difficult to adapt to the situation of electrothermal front bed, can position height, the length of electrode, the slag density of potential electrode exactly, for the automatic control realizing electrothermal front bed electrode provides important technological means;
(6) the utility model is not only applicable to the parameter detecting of electrothermal front bed, is applicable to the detection of the correlation parameter of other similar devices yet.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of liquid storage bottle;
Fig. 3 is the structural representation of balance pivot.
In figure: 1-main frame; 2-pressure unit; 3-small hose; The soft pipeloop of 4-; 5-liquid storage bottle; 6-travelling block; 7-stainless steel cord; 8-fixed pulley I; 9-fixed pulley II; 10-wirerope lasso; 11-sleeve; 12-silicone oil; 13-liquid storage bottle suspension ring; 14-sealing bolt; 15-force snesor; 16-load-bearing lever; 17-balance pivot; 18-bearing; 19-axle; 20-fixed pulley III; 21-fixed pulley IV; 22-electric windlass; 23-electrode; 24-electrothermal front bed.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, but protection domain of the present utility model is not limited to described content.
Embodiment 1
Electrothermal front bed electrode condition described in the present embodiment and slag density measuring equipment are applied to the electrothermal front bed of copper weld pool, and the condition of site of deployment is: the degree of depth of electrothermal front bed is 2m, and electrode is graphite electrode, and the sectional area of electrode is 0.16m
2, the initial length of electrode is 15m, and the line density of electrode is 320kg/m, and the variable density scope of slag is 6900-7300kg/m
3, the diameter of wirerope is 30mm.
Electrothermal front bed electrode condition described in the present embodiment and slag density measuring equipment comprise linkage, thing position-pressure conversion device, become and send and data processing equipment, weighing device, as shown in Figures 1 to 3;
Described linkage comprises travelling block 6, stainless steel cord 7, fixed pulley I 8, fixed pulley II 9, wirerope lasso 10; One end of stainless steel cord 7 is fixed on by wirerope lasso 10 on the wirerope of windlass 17, and be connected across on fixed pulley II 9, fixed pulley I 8 and travelling block 6 respectively in the middle of stainless steel cord 7, the other end is fixed on travelling block 6;
Thing position-pressure conversion device comprises: small hose 3, soft pipeloop 4, liquid storage bottle 5, sealing bolt 14; The lower end of travelling block 6 hangs with liquid storage bottle 5, and one end of small hose 3 is connected with liquid storage bottle 5, and the other end is connected with pressure unit 2, and the center section of small hose 3 is turned shape, forms soft pipeloop 4; Be full of silicone oil 12 in liquid storage bottle 5 and sealed by sealing bolt 14, liquid storage bottle 5 is provided with liquid storage bottle suspension ring 13, is connected between liquid storage bottle suspension ring 13 with travelling block 6 for living.
Change send and data processing equipment comprises main frame 1, pressure unit 2, and main frame 1 is connected with pressure unit 2;
Weighing device comprises main frame 1, force snesor 15, load-bearing lever 16, balance pivot 17, and main frame 1 is connected with force snesor 15, and force snesor 15 is connected with one end of load-bearing lever 16; The other end of load-bearing lever 16 is connected with fixed pulley III 20, and load-bearing lever 16 is positioned on balance pivot 17; Fixed pulley III 20, fixed pulley IV 21, electric windlass 22 are connected with electrode 23 by rope, by lever by the weight transmitting of electrode to force snesor 15, the signal of force snesor 15 sends into main frame 1, can calculate the weight of electrode.
Described small hose 3, soft pipeloop 4, liquid storage bottle 5, travelling block 6 are positioned at the inside of sleeve 11.
The upper end of described liquid storage bottle 5 is provided with liquid storage bottle suspension ring 13 and sealing bolt 14, and silicone oil 12 is equipped with in the inside of liquid storage bottle 5.
Described balance pivot 17 by axle 19 two ends respectively connection bearing 18 form, by the effect of bearing 18, weighing device elimination of level acting force, on the impact of force snesor 15, only retains electrode weight to the effect of force snesor 15.
In order to meet the measurement needs under application conditions, the model of each parts or specification is selected to be:
Main frame 1 model is IMC-821, band two-way 16 A/D input channels, and passage has signal amplifying function, and enlargement factor is 1-5000; Pressure unit 2 model is 3051TG, and pressure measurement range is 0-60KPa, two-wire system, powers as 24VDC; The internal diameter of small hose 3 is 2mm, and external diameter is 4mm, and material is teflon, and protective sleeve is 304L stainless (steel) wire; Diameter small hose 3 being coiled into soft pipeloop 4 is about 80mm; The material of liquid storage bottle 5 is 304L stainless steel, and internal diameter is 50mm, and external diameter is 56mm, and length is 60mm; The specification of travelling block 6 is wide * length=26mm*120mm; , the diameter of stainless steel cord 7 is 2mm, and the specification of fixed pulley 8 and fixed pulley 9 is M50, and material is 304L stainless steel; The diameter of wirerope lasso is 35mm, and material is 304L stainless steel; The internal diameter of sleeve 11 is Φ 120mm, and external diameter is Φ 126mm, and material is cast steel; The density of silicone oil 12 is 960kg/m
3; The diameter of liquid storage bottle suspension ring 13 is 25mm, and material is 304L stainless steel; The specification of sealing bolt 14 is M6X8, and material is 304L stainless steel; The model of force snesor 15 is HCHZ-102 cylindricality LOAD CELLS, and measurement range is 0-2t, powers as 10VDC; The length of load-bearing lever 16 is 1200mm, and diameter is Φ 60mm, and material is cast steel, and the length ratio of power arm and resistance arm is 3:1; Balance pivot 17 adopts bright bearing 18, and bearing specification is UC212; The diameter of axle 19 is Φ 60mm.
The measuring method of electrode position height is:
By the synergy of linkage and thing position-pressure conversion device, the change in location of electrode is converted to the change of silicone oil pressure, measured by pressure unit 2 pairs of silicone oil 12 pressure, and export the 4-20mA current signal be directly proportional to pressure, current signal is sent into main frame 1 and is processed, and the computing formula of electrode position height is
H＝H
0-K
H(N
1-N
10)
Wherein, H is electrode position height; H
0for original electrodes position height, distance when namely electrode is put into the end bottom electrode upper end to electrothermal front bed; K
hfor height coefficient, by suitable traveling electrode distance, utilize H and N
1value calculates and obtains; N
10for the A/D conversion value at zero point of pressure, namely electrode just on earth time pressure channel A/D conversion value; N is the real-time A/D conversion value of pressure.
In the present embodiment, H
0=15m, K
h=6.72 × 10
-4, N
10=7862, N
1variation range be 7862 ~ 30160.
Fluid pressure type electrothermal front bed electrode touches end judgement and alarm method is:
In electrode moving process, constantly the current weight value of electrode is compared with gravimetric value before, if difference change is greater than setting value (setting value is 400kg), wait for that after 5 seconds, this situation also exists, namely think that electrode touches the end, and in time warning is made to the tactile end.
The measuring method of electrode length is:
By the weight of potential electrode, in conjunction with the line density of electrode, calculate the length of electrode.
Fixed pulley III 20 is arranged on load-bearing lever 16, the weight of electrode passes to force snesor 15 by lever principle, the mV voltage signal that force snesor 15 exports is directly proportional to acting force, mV voltage signal is sent into main frame 1 and is carried out amplification and A/D conversion, utilize A/D conversion value to carry out the calculating of electrode length, the computing formula of electrode length is
L＝K
LK
w(N
20-N
2)/1000
Wherein, L is the length of electrode; K
lfor length factor; K
wfor the line density of electrode; N
2for the real-time A/D conversion value of weight; N
20for the A/D conversion value at zero point of weight, weight A/D conversion value when namely electrode is unsettled.
In the present embodiment, K
l=1.85 × 10
-3, K
w=320kg/m, N
20=31270, N
2variation range be 5897 ~ 31270.
The measuring method of electrothermal front bed slag density is:
Utilize the changing value of electrode position height and the changing value of electrode weight of measuring acquisition in rise fall of electrodes process, calculate the density of slag, slag density calculation formula is
d＝△W/S△H
△W＝K
w(N
21-N
22)
Wherein, d is the density of slag, and △ W is the weight change value before and after electrode moves, and S is the cross-sectional area of electrode, and △ H is the position height difference before and after electrode moves, K
wfor the line density of electrode, N
21for electrode move before weight A/D conversion value, N
22be respectively electrode move after weight A/D conversion value.
In the present embodiment, K
w=320kg/m, N
21and N
22variation range be 5897 ~ 31270.
Embodiment 2
Electrothermal front bed electrode condition described in the present embodiment and slag density measuring equipment are applied to the electrothermal front bed of lead smelting; Field data is: the degree of depth of electrothermal front bed is 2.5m, and electrode is graphite electrode, and the sectional area of electrode is 0.25m
2, the initial length of electrode is 18m, and the line density of electrode is 500kg/m, and the variable density scope of slag is 8900-1010kg/m
3, the diameter of wirerope is 35mm.
Electrothermal front bed electrode condition described in the present embodiment and slag density measuring equipment comprise linkage, thing position-pressure conversion device, become and send and data processing equipment, weighing device;
Described linkage comprises travelling block 6, stainless steel cord 7, fixed pulley I 8, fixed pulley II 9, wirerope lasso 10; One end of stainless steel cord 7 is fixed on by wirerope lasso 10 on the wirerope of windlass 17, and be connected across on fixed pulley II 9, fixed pulley I 8 and travelling block 6 respectively in the middle of stainless steel cord 7, the other end is fixed on travelling block 6;
Thing position-pressure conversion device comprises: small hose 3, soft pipeloop 4, liquid storage bottle 5, sealing bolt 14; The lower end of travelling block 6 hangs with liquid storage bottle 5, and one end of small hose 3 is connected with liquid storage bottle 5, and the other end is connected with pressure unit 2, and the center section of small hose 3 is turned shape, forms soft pipeloop 4; Be full of silicone oil 12 in liquid storage bottle 5 and sealed by sealing bolt 14, liquid storage bottle 5 is provided with liquid storage bottle suspension ring 13, is connected between liquid storage bottle suspension ring 13 with travelling block 6 for living.
Change send and data processing equipment comprises main frame 1, pressure unit 2, and main frame 1 is connected with pressure unit 2;
Weighing device comprises main frame 1, force snesor 15, load-bearing lever 16, balance pivot 17, and main frame 1 is connected with force snesor 15, and force snesor 15 is connected with one end of load-bearing lever 16; The other end of load-bearing lever 16 is connected with fixed pulley III 20, and load-bearing lever 16 is positioned on balance pivot 17; Fixed pulley III 20, fixed pulley IV 21, electric windlass 22 are connected with electrode 23 by rope, by lever by the weight transmitting of electrode to force snesor 15, the signal of force snesor 15 sends into main frame 1, can calculate the weight of electrode.
Described small hose 3, soft pipeloop 4, liquid storage bottle 5, travelling block 6 are positioned at the inside of sleeve 11.
The upper end of described liquid storage bottle 5 is provided with liquid storage bottle suspension ring 13 and sealing bolt 14, and silicone oil 12 is equipped with in the inside of liquid storage bottle 5.
Described balance pivot 17 by axle 19 two ends respectively connection bearing 18 form, by the effect of bearing 18, weighing device elimination of level acting force, on the impact of force snesor 15, only retains electrode weight to the effect of force snesor 15.
In order to meet the measurement needs under this application condition, the model of each parts or specification are:
Main frame 1 model is IMC-821, band two-way 16 A/D input channels, and passage has signal amplifying function, and enlargement factor is 1-5000; Pressure unit 2 model is EJA430A, and pressure measurement range is 0-70KPa, two-wire system, powers as 24VDC; The internal diameter of small hose 3 is 1.5mm, and external diameter is 3mm, and material is teflon, and protective sleeve is stainless (steel) wire; Diameter small hose 3 being coiled into soft pipeloop 4 is about 70mm; The material of liquid storage bottle 5 is 304L stainless steel, and internal diameter is 40mm, and external diameter is 46mm, and length is 50mm; The specification of travelling block 6 is wide * length=20mm*100mm; , the diameter of stainless steel cord 7 is 1.5mm, and the specification of fixed pulley 8 and fixed pulley 9 is M40, and material is stainless steel; The diameter of wirerope lasso is 40mm, and material is 304L stainless steel; The internal diameter of sleeve 11 is Φ 100mm, and external diameter is Φ 106mm, and material is cast steel; The density of silicone oil 12 is 960kg/m
3; The diameter of liquid storage bottle suspension ring 13 is 20mm, and material is 304L stainless steel; The specification of sealing bolt 14 is M5X6, and material is 304L stainless steel; The model of force snesor 15 is JLBT-2t cylindricality LOAD CELLS, and measurement range is 0-3.5t, powers as 10VDC; The length of load-bearing lever 16 is 1000mm, and diameter is Φ 70mm, and material is cast steel, and the length ratio of power arm and resistance arm is 3:1; Balance pivot 17 adopts and connects a bearing 18, and bearing specification is 90514; The diameter of axle 19 is Φ 70mm.
The measuring method of electrode position height is:
By the synergy of linkage and thing position-pressure conversion device, the change in location of electrode is converted to the change of silicone oil pressure, measured by pressure unit 2 pairs of silicone oil 12 pressure, and export the 4-20mA current signal be directly proportional to pressure, current signal is sent into main frame 1 and is processed, the computing formula of electrode position height
H＝H
0-K
H(N
1-N
10)
Wherein, H is electrode position height; H
0for original electrodes position height, also-electrode upper end level when not using front electrode to touch bottom electrothermal front bed; K
hfor height coefficient, by the suitable traveling electrode distance of segmentation, obtain H and N
1acquisition is calculated after value; N
10for the A/D conversion value at zero point of pressure, the A/D conversion value of pressure channel when namely electrode touches bottom electrothermal front bed; N is the real-time A/D conversion value of pressure.
In the present embodiment, H
0=18m, N
10=6820, K
h=7.92 × 10
-4, N
1variation range be 6820 ~ 29540.
Electrothermal front bed electrode touches end judgement and alarm method is:
In electrode moving process, constantly the current weight value of electrode is compared with gravimetric value before, if difference change is greater than setting value (setting value is 300kg), wait for that after 8 seconds, this situation also exists, namely think that electrode touches the end, and in time warning is made to the tactile end.
The measuring method of electrode length is:
Fixed pulley III 20 is supported by load-bearing lever 16, and press lever principle by the weight transmitting of electrode to force snesor 15, the mV voltage signal that force snesor 15 exports is directly proportional to acting force, and mV voltage signal is sent into main frame 1 and carried out amplification and A/D conversion, and the computing formula of electrode length is
L＝K
LK
w(N
20-N
2)/1000
Wherein, L is the length of electrode; K
lfor length factor; K
wfor the line density of electrode; N
2for the real-time A/D conversion value of weight; N
20for the A/D conversion value at zero point of weight, namely electrode firm unsettled time weight A/D conversion value.
In this example, K
l=1.91 × 10
-3, K
w=500kg/m, N
20=27650, N
2variation range be 8832 ~ 27650.
The measuring method of electrothermal front bed slag density is:
Utilize the changing value of electrode position height and the changing value of electrode weight that obtain in rise fall of electrodes process, calculate the density of slag, slag density calculation formula is
d＝(△W-K
1△H)/S△H
△W＝K
w(N
21-N
22)
Wherein, d is the density of slag, and △ W is the weight change value before and after electrode moves, and S is the cross-sectional area of electrode, and △ H is the changing value of the position height before and after electrode moves, K
wfor the line density of electrode, K
1for the line density of steel cable, N
21for electrode move before weight A/D conversion value, N
22for electrode move after weight A/D conversion value.
In this example, K
w=500kg/m, N
21and N
22variation range be 8832 ~ 27650.
Embodiment 3
Electrothermal front bed electrode condition described in the present embodiment and slag density measuring equipment are applied to the electrothermal front bed of Zinc smelting.Field data is: the degree of depth of electrothermal front bed is 2.2m, and electrode is graphite electrode, and the sectional area of electrode is 0.2m
2, the initial length of electrode is 13m, and the line density of electrode is 400kg/m, and the variable density scope of slag is 5100-5700kg/m
3, the diameter of wirerope is 30mm.
Electrothermal front bed electrode condition described in the present embodiment and slag density measuring equipment comprise linkage, thing position-pressure conversion device, become and send and data processing equipment, weighing device;
Described linkage comprises travelling block 6, stainless steel cord 7, fixed pulley I 8, fixed pulley II 9, wirerope lasso 10; One end of stainless steel cord 7 is fixed on by wirerope lasso 10 on the wirerope of windlass 17, and be connected across on fixed pulley II 9, fixed pulley I 8 and travelling block 6 respectively in the middle of stainless steel cord 7, the other end is fixed on travelling block 6;
Thing position-pressure conversion device comprises: small hose 3, soft pipeloop 4, liquid storage bottle 5, sealing bolt 14; The lower end of travelling block 6 hangs with liquid storage bottle 5, and one end of small hose 3 is connected with liquid storage bottle 5, and the other end is connected with pressure unit 2, and the center section of small hose 3 is turned shape, forms soft pipeloop 4; Be full of silicone oil 12 in liquid storage bottle 5 and sealed by sealing bolt 14, liquid storage bottle 5 is provided with liquid storage bottle suspension ring 13, is connected between liquid storage bottle suspension ring 13 with travelling block 6 for living.
Change send and data processing equipment comprises main frame 1, pressure unit 2, and main frame 1 is connected with pressure unit 2;
Weighing device comprises main frame 1, force snesor 15, load-bearing lever 16, balance pivot 17, and main frame 1 is connected with force snesor 15, and force snesor 15 is connected with one end of load-bearing lever 16; The other end of load-bearing lever 16 is connected with fixed pulley III 20, and load-bearing lever 16 is positioned on balance pivot 17; Fixed pulley III 20, fixed pulley IV 21, electric windlass 22 are connected with electrode 23 by rope, by lever by the weight transmitting of electrode to force snesor 15, the signal of force snesor 15 sends into main frame 1, can calculate the weight of electrode.
Described small hose 3, soft pipeloop 4, liquid storage bottle 5, travelling block 6 are positioned at the inside of sleeve 11.
The upper end of described liquid storage bottle 5 is provided with liquid storage bottle suspension ring 13 and sealing bolt 14, and silicone oil 12 is equipped with in the inside of liquid storage bottle 5.
Described balance pivot 17 by axle 19 two ends respectively connection bearing 18 form, by the effect of bearing 18, weighing device elimination of level acting force, on the impact of force snesor 15, only retains electrode weight to the effect of force snesor 15.
In order to meet the measurement needs under this application condition, the model of each parts or specification are:
Main frame 1 adopts S7-200PLC, be made up of PLC, signal amplification module, power supply etc., CPU model is 6ES7214-1AD23-0XB0, A/D module model is UN 231-0HH32-0XA016 position, D/A module model is UN232-0HB22-0XA012 position, signal amplifier model is RW-ST01A enlargement factor is 1-6000, and power supply is 24VDC; Pressure unit 2 model is 3051, and pressure measurement range is 0-60KPa, two-wire system, powers as 24VDC; The internal diameter of small hose 3 is 1.5mm, and external diameter is 3mm, and material is teflon, and protective sleeve is stainless (steel) wire; Diameter small hose 3 being coiled into soft pipeloop 4 is about 80mm; The material of liquid storage bottle 5 is 304 stainless steels, and internal diameter is 44mm, and external diameter is 50mm, and length is 40mm; The specification of travelling block 6 is wide * length=24mm*110mm; , the diameter of stainless steel cord 7 is 1.5mm, and the specification of fixed pulley 8 and fixed pulley 9 is M50, and material is stainless steel; The diameter of wirerope lasso is 35mm, and material is 304L stainless steel; The internal diameter of sleeve 11 is Φ 100mm, and external diameter is Φ 106mm, and material is cast steel; The density of silicone oil 12 is 960kg/m
3; The diameter of liquid storage bottle suspension ring 13 is 20mm, and material is 304L stainless steel; The specification of sealing bolt 14 is M6X6, and material is 304L stainless steel; The model of force snesor 15 is the S shape LOAD CELLS of YZC-516-1t, and measurement range is 0-2t, powers as 10VDC; The length of load-bearing lever 16 is 1000mm, and diameter is Φ 60mm, and material is cast steel, and the length ratio of power arm and resistance arm is 3:1; Balance pivot 17 adopts and connects a bearing 18, and bearing specification is 90513; The diameter of axle 19 is Φ 65mm.
The measuring method of electrode position height is:
By the synergy of linkage and thing position-pressure conversion device, the change in location of electrode is converted to the change of silicone oil pressure, measured by pressure unit 2 pairs of silicone oil 12 pressure, and export the 4-20mA current signal be directly proportional to pressure, current signal is sent into main frame 1 and is processed, the computing formula of electrode position height
H＝H
0-K
H(N
1-N
10)
Wherein, H is electrode position height; H
0for original electrodes position height, also-electrode upper end level when not using front electrode to touch bottom electrothermal front bed; K
hfor height coefficient, by the suitable traveling electrode distance of segmentation, utilize H and N
1value calculates and obtains; N
10for the A/D conversion value at zero point of pressure, the A/D conversion value of pressure channel when namely electrode touches bottom electrothermal front bed; N is the real-time A/D conversion value of pressure.
In this example, H
0=13m, N
10=11020, K
h=6.62 × 10
-4, N
1variation range be 11020 ~ 30650.
Electrothermal front bed electrode touches end judgement and alarm method is:
In electrode moving process, constantly the current weight value of electrode is compared with gravimetric value before, if difference change is greater than setting value (setting value is 250kg), wait for that after 6 seconds, this situation also exists, namely think that electrode touches the end, and in time warning is made to the tactile end.
The measuring method of electrode length is:
Fixed pulley III 20 is supported by load-bearing lever 16, and press lever principle by the weight transmitting of electrode to force snesor 15, the mV voltage signal that force snesor 15 exports is directly proportional to acting force, and mV voltage signal is sent into main frame 1 and carried out amplification and A/D conversion, and the computing formula of electrode length is
L＝K
LK
w(N
20-N
2)/1000
Wherein, L is the length of electrode; K
lfor length factor; K
wfor the line density of electrode; N
2for the real-time A/D conversion value of weight; N
20for the A/D conversion value at zero point of weight, namely electrode firm unsettled time weight A/D conversion value.
In this example, K
l=1.61 × 10
-3, K
w=400kg/m, N
20=29840, N
2variation range be 9720 ~ 29840.
The measuring method of electrothermal front bed slag density is:
Utilize the changing value of electrode position height and the changing value of electrode weight that obtain in rise fall of electrodes process, calculate the density of slag, slag density calculation formula is
d＝(△W-K
1△H)/S△H
△W＝K
w(N
21-N
22)
Wherein, d is the density of slag, and △ W is the weight change value before and after electrode moves, and S is the cross-sectional area of electrode, and △ H is the changing value of the position height before and after electrode moves, K
wfor the line density of electrode, N
21for electrode move before weight A/D conversion value, N
22for electrode move after weight A/D conversion value.
In this example, K
w=400kg/m, N
21and N
22variation range be 9720 ~ 29840.
Claims (4)
1. electrothermal front bed electrode condition and a slag density measuring equipment, is characterized in that: described pick-up unit comprises linkage, thing position-pressure conversion device, becomes and send and data processing equipment, weighing device;
Described linkage comprises travelling block (6), stainless steel cord (7), fixed pulley I (8), fixed pulley II (9), wirerope lasso (10); One end of stainless steel cord (7) is fixed on the wirerope of windlass (17) by wirerope lasso (10), be connected across on fixed pulley II (9), fixed pulley I (8) and travelling block (6) respectively in the middle of stainless steel cord (7), the other end is fixed on travelling block (6);
Thing position-pressure conversion device comprises: small hose (3), soft pipeloop (4), liquid storage bottle (5), sealing bolt (14); The lower end of travelling block (6) hangs with liquid storage bottle (5), one end of small hose (3) is connected with liquid storage bottle (5), the other end is connected with pressure unit (2), the center section of small hose (3) is turned shape, forms soft pipeloop (4);
Change send and data processing equipment comprises main frame (1), pressure unit (2), and main frame (1) is connected with pressure unit (2);
Weighing device comprises main frame (1), force snesor (15), load-bearing lever (16), balance pivot (17), main frame (1) is connected with force snesor (15), and force snesor (15) is connected with one end of load-bearing lever (16); The other end of load-bearing lever (16) is connected with fixed pulley III (20), and load-bearing lever (16) is positioned on balance pivot (17); Fixed pulley III (20), fixed pulley IV (21), electric windlass (22) are connected with electrode (23) by rope.
2. fluid pressure type electrode position pick-up unit according to claim 1, is characterized in that: small hose (3), soft pipeloop (4), liquid storage bottle (5), travelling block (6) are positioned at the inside of sleeve (11).
3. fluid pressure type electrode position pick-up unit according to claim 1, it is characterized in that: the upper end of described liquid storage bottle (5) is provided with liquid storage bottle suspension ring (13) and sealing bolt (14), be full of silicone oil (12) in liquid storage bottle (5) and sealed by sealing bolt (14), liquid storage bottle (5) is provided with liquid storage bottle suspension ring (13), is connected between liquid storage bottle suspension ring (13) with travelling block (6) for living.
4. Weighing type electrode length measurement mechanism according to claim 1, is characterized in that: described balance pivot (17) is made up of axle (19) two ends difference connection bearing (18).
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|---|---|---|---|
| CN201520300223.XU CN204679109U (en) | 2015-05-11 | 2015-05-11 | A kind of electrothermal front bed electrode condition and slag density measuring equipment |
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|---|---|---|---|
| CN201520300223.XU CN204679109U (en) | 2015-05-11 | 2015-05-11 | A kind of electrothermal front bed electrode condition and slag density measuring equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864910A (en) * | 2015-05-11 | 2015-08-26 | 昆明理工大学 | Electric heating fore well electrode state and slag density measuring device and measuring method |
| WO2017182902A1 (en) * | 2016-04-21 | 2017-10-26 | Glencore Operation South Africa (Proprietary) Limited | An arc smelting system and method of monitoring the length of an electrode in said system |
| TWI638137B (en) * | 2017-02-14 | 2018-10-11 | 日商新日鐵住金股份有限公司 | Method of detecting slag within molten steel flow |
-
2015
- 2015-05-11 CN CN201520300223.XU patent/CN204679109U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864910A (en) * | 2015-05-11 | 2015-08-26 | 昆明理工大学 | Electric heating fore well electrode state and slag density measuring device and measuring method |
| CN104864910B (en) * | 2015-05-11 | 2017-06-13 | 昆明理工大学 | A kind of electrothermal front bed electrode condition and slag density measuring equipment and measuring method |
| WO2017182902A1 (en) * | 2016-04-21 | 2017-10-26 | Glencore Operation South Africa (Proprietary) Limited | An arc smelting system and method of monitoring the length of an electrode in said system |
| EA036461B1 (en) * | 2016-04-21 | 2020-11-12 | Гленкор Оперейшнс Саут Африка (Пропрайетери) Лимитед | Arc smelting system and method of monitoring the length of an electrode in said system |
| TWI638137B (en) * | 2017-02-14 | 2018-10-11 | 日商新日鐵住金股份有限公司 | Method of detecting slag within molten steel flow |
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