CN117342282A - Comprehensive detection system and method for stock quantity of automatic steel-making feeding high-level stock bin - Google Patents
Comprehensive detection system and method for stock quantity of automatic steel-making feeding high-level stock bin Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009628 steelmaking Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 231
- 238000005303 weighing Methods 0.000 claims abstract description 45
- 238000003860 storage Methods 0.000 claims abstract description 39
- 239000012769 display material Substances 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000004364 calculation method Methods 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 11
- 238000004513 sizing Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000032258 transport Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 6
- 102100026205 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-1 Human genes 0.000 description 8
- 101000691599 Homo sapiens 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-1 Proteins 0.000 description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/005—Control arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/26—Overfill prevention
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/32—Filling devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/44—Devices for emptying otherwise than from the top using reciprocating conveyors, e.g. jigging conveyors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention relates to a comprehensive detection system and method for the stock quantity of an automatic steel-making feeding high-level stock bin, and belongs to the technical field of material level detection. The technical proposal is as follows: the discharging port of the underground storage bin (3) is matched with the feeding end of the belt (7) through the vibrating screen A (5), the feeding end of the belt (7) is provided with a belt scale (6), the discharging end of the belt (7) is matched with the feeding port of the high-level storage bin (9), the high-level storage bin (9) is provided with a radar level gauge (8), and the discharging port of the high-level storage bin (9) is connected with the converter through the vibrating screen B, the weighing hopper and the vibrating screen C in sequence; the material weight of the high-level bin is calculated through the feeding PLC and the converter PLC, the theoretical material level of the high-level bin is obtained through a logic algorithm by the converter PLC, and the theoretical material level is compared with the display material level of the radar level gauge, so that the reliable measurement of the material weight of the high-level bin is realized. The invention avoids accidents such as material overflow, material shortage and the like in the automatic feeding process, and can ensure the stable operation of the converter blanking system to the greatest extent.
Description
Technical Field
The invention relates to a comprehensive detection system and method for the stock quantity of an automatic steel-making feeding high-level stock bin, and belongs to the technical field of material level detection.
Background
The core of the control concept of the unmanned automatic feeding system in the existing steel enterprises is to automatically feed according to the stock quantity of the converter high-level stock bin, so that the converter high-level stock bin is always kept at a safe stock level. Whether the material level of the high-level material bin is measured accurately or not is related to whether the whole automatic feeding system can normally operate, the measurement of the material level of the high-level material bin at present only depends on the detection of a radar material level gauge, when the material level gauge is powered off, broken lines, dead machines and other faults occur, if other data are not used as comparison, the automatic feeding system cannot normally operate, the situation of material overflow and material shortage easily occurs, and the smooth operation of converter production is seriously affected.
Disclosure of Invention
The invention aims to provide a comprehensive detection system and method for the stock quantity of an automatic steel-making feeding high-level stock bin, which meet the requirement that the high-level stock bin is always positioned at a safe material level in the automatic feeding process, avoid the situation that the high-level stock bin is subjected to material overflow and material shortage, and solve the problems in the prior art.
The technical scheme of the invention is as follows:
the comprehensive detection system comprises a feeding PLC, an underground bin, a ground bin weighing and vibrating screen A, a belt scale, a belt, a radar level gauge, a high bin, materials, a vibrating screen B, a weighing hopper weighing, a vibrating screen C, a converter PLC and a converter, wherein the ground bin weighing is arranged on the underground bin, a discharge port of the underground bin is matched with a feed end of the belt through the vibrating screen A, the belt scale is arranged at the feed end of the belt, the discharge end of the belt is matched with a feed port of the high bin, the high bin is provided with a radar level gauge, and the discharge port of the high bin is connected with the converter sequentially through the vibrating screen B, the weighing hopper and the vibrating screen C; the material weight of the high-level bin is calculated through the feeding PLC and the converter PLC, the theoretical material level of the high-level bin is obtained through a logic algorithm by the converter PLC, and is compared with the display material level of the radar material level meter, so that the reliable measurement of the material weight of the high-level bin is realized, the high-level bin is always in the requirement of safe material level, and the situations of material overflow and material shortage of the high-level bin are avoided.
Further, the judgment condition of the high-level bin level alarm is that the deviation between the theoretical level of the high-level bin and the display level of the radar level gauge is more than 0.5 meter.
Further, an alarm device is arranged in the system, and the alarm device alarms when the data communication between the feeding PLC and the converter PLC is interrupted.
Further, the ground bin weighing system of the underground bin is used for comparing with a belt scale to obtain the feeding amount of the converter high-level bin.
A comprehensive detection method for the stock quantity of an automatic steel-making feeding high-level stock bin is carried out by adopting the comprehensive detection system, and comprises the following steps:
when the underground storage bin conveys materials into the high-level storage bin through the belt, the belt is used for weighing the load capacity of each meter of the belt and recording the load capacity in a DB block of the feeding PLC, and when the belt moves to a second material conveying vehicle at a feed inlet of the high-level storage bin, the weight data of the materials are added into the change quantity of the feeding quantity; when the high-level bin is used for discharging the materials to the weighing hopper, the weighing hopper is used for weighing, the weight of the batch of materials is obtained, and the batch carrying capacity is added into the discharging variable quantity;
the weight calculation formula of the existing materials in the high-level bin is as follows:
W T ＝W T-1 +W in -W out
wherein W is T Calculating the weight of the existing materials in the periodical high-level bin; w (W) T-1 The weight of the materials stored in the high-level bin is calculated for the previous calculation period; w (W) in The feeding amount change amount in the period is used; w (W) out The change amount of the blanking amount in the period;
the calculation formula of the interconversion of the weight and the volume of the materials in the high-level bin is as follows:
V T calculating the volume of the existing materials in the periodical high-level bin; ρ is the density of the material in the i-number high-level bin; the inside of the high-level bin is formed by splicing a quadrangular frustum and a quadrangular prism, and the method for mutually converting the volume of the material in the high-level bin and the height of the material level is as follows:
when the material is fed to the quadrangular frustum pyramid part of the high-level material bin by the material transporting vehicle, the volume and the height are mutually converted by using a difference value comparison table, a section is arranged for each 0.5 meter of the quadrangular frustum pyramid part, the height at the head and the tail of the section is manually measured once, and the volume data corresponding to the material level height is recorded and used as a reference point for calculating the difference value; taking the example of volume conversion into height, the difference calculation formula is:
H T the theoretical material level height of the current high-level bin; v (V) max Is V (V) T The volume maximum value in the interval; v (V) min Is V (V) T Minimum volume in the interval, H max For the maximum theoretical material level height of the current high-level bin, H min Is the current high-level stock binIs a theoretical level height minimum of (2);
when the volume of the materials in the high-level material bin exceeds the volume of the quadrangular prism part, the material transporting vehicle transports the quadrangular prism part of the high-level material bin to feed materials, and the theoretical material level height calculation formula of the high-level material bin is as follows:
V closing device Is the volume of a quadrangular frustum pyramid part of the high-level stock bin, V Column The capacity of the quadrangular part of the high-level bin is that k is a certain bin sizing coefficient, the default is 1, and the modification is carried out after sizing; h is a 1 Is the height of the quadrangular prism part of the high-level bin, h 2 The height of the quadrangular frustum pyramid part of the high-level bin is equal to the height of the quadrangular frustum pyramid part of the high-level bin, and V is the volume of the high-level bin.
Further, when the data communication between the feeding PLC and the converter PLC is interrupted, voice alarm is carried out to prompt post personnel to confirm on site, and the calculated value of the theoretical material level does not participate in automatic feeding logic judgment at the moment, so that the occurrence of material overflow and material shortage accidents is avoided.
Further, a "shield" button and a "force" button are provided in the control panel of the present system. When the radar level gauge fails, an operator can click a shielding button to shield the failure level gauge, and the radar level count value is not involved in intra-program control.
When the post inspection personnel actually observe through the on-site bin, and find that the theoretical material level at the calculation position is obviously different from the actual material level, the radar material level count value can be assigned to the calculation material level by clicking a 'forced' button.
The invention improves that the theoretical material level of the high-level bin is indirectly obtained through the total feeding weight, the total discharging weight and the bin volume of the high-level bin, and the feeding PLC calculates and updates data every 2 seconds.
The invention has the positive effects that: the theoretical material level of the high-order bin is obtained through a logic algorithm and is compared with the display material level of the radar level indicator, so that the reliable measurement of the material quantity of the high-order bin is realized. The theoretical material level in the invention is used as an effective supplement of radar material level, and the safe and stable operation of the whole automatic feeding system is ensured through the comparison of the two material levels, so that accidents such as material burst, material shortage and the like in the automatic feeding process are avoided, and the stable operation of the converter discharging system can be ensured to the greatest extent.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a diagram showing the volume parameters of the high-level bin according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the material level in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second embodiment of the present invention;
in the figure: 1 feeding PLC, 2 material handling vehicle I, 3 underground bin, 4 ground bin weighing, 5 vibrating screen A, 6 belt scale, 7 belt, 71 underground bin belt, 72 conveying belt I, 73 conveying belt II, 74 conveying belt III, 8 radar level gauge, 9 high-order bin, 10 material, 11 vibrating screen B, 12 weighing hopper, 13 weighing hopper weighing, 14 vibrating screen C, 15 converter PLC, 16 converter, 17 material handling vehicle II, 18 theoretical material level, 19 display material level, 20 actual material level.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
the comprehensive detection system comprises a feeding PLC1, an underground storage bin 3, a ground storage bin weighing 4, a vibrating screen A5, a belt scale 6, a belt 7, a radar level gauge 8, a high storage bin 9, a material 10, a vibrating screen B11, a weighing hopper 12, a weighing hopper weighing 13, a vibrating screen C14, a converter PLC15 and a converter 16, wherein the ground storage bin 3 is provided with the ground storage bin weighing 4, a discharge port of the underground storage bin 3 is matched with a feed end of the belt 7 through the vibrating screen A5, the feed end of the belt 7 is provided with the belt scale 6, a discharge end of the belt 7 is matched with a feed port of the high storage bin 9, the high storage bin 9 is provided with the radar level gauge 8, and a discharge port of the high storage bin 9 is sequentially connected with the converter 16 through the vibrating screen B11, the weighing hopper 12 and the vibrating screen C14; the material storage weight of the high-level bin 9 is calculated through the feeding PLC1 and the converter PLC15, the theoretical material level 18 of the high-level bin 9 is obtained through a logic algorithm by the converter PLC15, and the theoretical material level 18 is compared with the display material level 19 of the radar level gauge 8, so that the reliable measurement of the material storage amount of the high-level bin 9 is realized.
The judgment condition of the material level alarm of the high-level material bin 9 is that the deviation between the theoretical material level of the high-level material bin 9 and the displayed material level of the radar level gauge 8 is more than 0.5 meter.
An alarm device is arranged in the system, and the alarm device alarms when the data communication between the feeding PLC1 and the converter PLC15 is interrupted.
A comprehensive detection method for the stock quantity of an automatic steel-making feeding high-level stock bin is carried out by adopting the comprehensive detection system, and comprises the following steps:
when the underground storage bin 3 conveys materials into the high-level storage bin 9 through the belt 7, the belt weight 6 is used for measuring the carrying capacity of each meter of the belt and recording the carrying capacity in the DB block of the feeding PLC1, and when the belt 7 moves to the second material transporting vehicle 17 at the feeding port of the high-level storage bin 9, the material weight data is added into the feeding quantity variation; when the high-level bin 9 feeds the weighing hopper 12, weighing the materials by using the weighing hopper to obtain the weight of the batch of materials, and adding the load weight of the batch into the feeding amount variation;
the weight calculation formula of the existing materials in the high-level bin is as follows:
W T ＝W T-1 +W in -W out
wherein W is T Calculating the weight of the existing materials in the periodical high-level bin; w (W) T-1 The weight of the materials stored in the high-level bin is calculated for the previous calculation period; w (W) in The feeding amount change amount in the period is used; w (W) out The change amount of the blanking amount in the period;
the calculation formula of the interconversion of the weight and the volume of the materials in the high-level bin is as follows:
V T calculating the volume of the existing materials in the periodical high-level bin; ρ is the density of the material in the i-number high-level bin;
the inside of the high-level bin is formed by splicing a quadrangular frustum and a quadrangular prism, and the method for mutually converting the volume of the material in the high-level bin and the height of the material level is as follows:
when the material is fed to the quadrangular frustum pyramid part of the high-level material bin by the material transporting vehicle, the volume and the height are mutually converted by using a difference value comparison table, a section is arranged for each 0.5 meter of the quadrangular frustum pyramid part, the height at the head and the tail of the section is manually measured once, and the volume data corresponding to the material level height is recorded and used as a reference point for calculating the difference value; taking the example of volume conversion into height, the difference calculation formula is:
H T the theoretical material level height of the current high-level bin; v (V) max Is V (V) T The volume maximum value in the interval; v (V) min Is V (V) T Minimum volume in the interval, H max For the maximum theoretical material level height of the current high-level bin, H min The theoretical material level height minimum value of the current high-level material bin;
when the volume of the materials in the high-level material bin exceeds the volume of the quadrangular prism part, the material transporting vehicle transports the quadrangular prism part of the high-level material bin to feed materials, and the theoretical material level height calculation formula of the high-level material bin is as follows:
V closing device Is the volume of a quadrangular frustum pyramid part of the high-level stock bin, V Pouring The capacity of the quadrangular part of the high-level bin is that k is a certain bin sizing coefficient, the default is 1, and the modification is carried out after sizing; h is a 1 Is the height of the quadrangular prism part of the high-level bin, h 2 The height of the quadrangular frustum pyramid part of the high-level bin is equal to the height of the quadrangular frustum pyramid part of the high-level bin, and V is the volume of the high-level bin.
When the data communication between the feeding PLC1 and the converter PLC15 is interrupted, voice alarm is carried out to prompt post personnel to confirm on site, and the calculated value of the theoretical material level does not participate in automatic feeding logic judgment at the moment, so that the occurrence of material overflow and material shortage accidents is avoided.
Referring to fig. 1, in a first embodiment: a comprehensive detection system for the stock quantity of a steel-making automatic feeding high-level stock bin comprises a feeding PLC1, a first material conveying vehicle 2, an underground stock bin 3, a ground bin weighing 4, a vibrating screen A5, a belt scale 6, a belt 7, a radar level gauge 8, a high-level stock bin 9, a material 10, a vibrating screen B11, a weighing hopper 12, a weighing hopper weighing 13, a vibrating screen C14, a converter PLC15 and a converter 16. The radar level gauge 8 is arranged on the high-level bin 9, materials reach the underground bin 9 through the first material conveying vehicle 2, then enter the high-level bin 9 through the vibrating screen A5, the belt scale 6 and the belt 7, and the materials in the high-level bin 9 enter the converter 16 through the vibrating screen B11, the weighing hopper 12 and the vibrating screen C14. The feeding PLC1 and the converter PLC15 are used for calculating the material weight in the high-level bin, the converter PLC15 obtains the theoretical material level 18 of the high-level bin through a logic algorithm, and the theoretical material level 18 is compared with the display material level 19 of the radar level gauge, so that the reliable measurement of the material weight of the high-level bin is realized.
In the implementation, the specific technical scheme is as follows:
1. the safety of the automatic feeding control system is solved:
when the deviation between the theoretical material level and the display material level is more than 0.5 meter, the automatic control system alarms the material level of the high-level material bin.
2. Measurement accuracy of an automatic control system is solved:
the accuracy of the theoretical material level of the high-level bin can be realized to the greatest extent through parameters such as the sticking coefficient, the bin volume, the bulk density of the materials and the like.
Taking a converter 1# high-order lime storage bin as an example:
binding coefficient: 1, a step of;
the volume of the storage bin is as follows: 47.01;
lime bulk specific gravity: 0.58;
belt scale: model ICS-14B, weighing range 1-800T/H, quantity 1;
ground bin weighing sensor: model CZL-YB-4 measuring range 10T, number 4;
weighing hopper weighing sensor: model CZL-YB-4 measuring range 10T, number 4;
when the underground bin conveys lime to the high-level bin through the belt, the carrying capacity of the belt per meter is measured through the belt scale and recorded in the DB block, and when the belt moves to the second material transporting vehicle, the weight data are added into the feeding quantity change quantity.
When the high-level bin feeds the weighing hopper, the weighing hopper is used for weighing, so that the weight of the lime in the batch is obtained. And the load of the batch is added to the variation of the blanking amount.
The weight calculation formula of the existing materials in the stock bin is as follows:
W T ＝W T-1 +W in -W out
wherein W is T Calculating the weight of the existing materials in the periodical bin; w (W) T-1 The weight of the materials stored in the bin is calculated for the previous calculation period; w (W) in The feeding amount change amount in the period is used; w (W) out The amount of change in the amount of feed in this period. The calculation formula of the interconversion of the weight and the volume of the materials in the high-level bin is as follows:
V T calculating the volume of the existing materials in the periodical bin; ρ is the density of the material in the bin number i.
The volume of the high-level lime storage bin is shown in figure 2, the upper part of the high-level lime storage bin is a quadrangular prism, and the upper surface of the quadrangular prism is a long side S 1 5.25 m, short side S 2 Rectangle of 1.6 m, prism height h 1 7.9 meters. The lower part is a quadrangular frustum with the upper surface the same as that of the quadrangular prism and the lower surface is a side length S 3 Square with 0.6 meter and quadrangular pyramid height h 2 3.95 meters.
The method for mutually converting the volume and the material level height of the material in the high-level material bin comprises the following steps:
when the material is fed to the quadrangular frustum pyramid part of the high-level bin by the material conveying vehicle, the volume and the height are mutually converted by using a difference value comparison table. Setting a section for each 0.5 m of the quadrangular frustum portion, manually measuring the height of the section at the head and the tail, recording volume data corresponding to the material level height, and using the volume data as a reference point for calculating a difference value. At 1.5m 3 For example, the volume of the liquid level is converted into the height, and the table look-up shows that the volume is in the range of 1m-1.5m of the liquid level, and the difference value calculation method is used as follows:
H T the theoretical material level height of the current stock bin; v (V) Example(s) Is the volume value in the example; v (V) 1.5m Is V (V) Example(s) The volume maximum value in the interval; v (V) 1m Is V (V) Example(s) The volume within the interval is the smallest. The height translates to a volumetric uniformity.
When the volume of the materials in the high-level material bin exceeds the volume of the quadrangular prism part, the material transporting vehicle transports the quadrangular prism part of the high-level material bin to feed materials, and the calculation formula of the theoretical material level height of the material bin is as follows:
V bench Is the volume of a quadrangular frustum pyramid part of the high-level stock bin, V Column The capacity of the quadrangular part of the high-level bin is that k is a certain bin sizing coefficient, the default is 1, and the modification is carried out after sizing; h is a 1 Is the height of the quadrangular prism part of the high-level bin, h 2 Is the height of the quadrangular frustum pyramid part of the high-level stock bin.
The theoretical level, the display level and the actual level in the high-level bin are shown in fig. 3.
And comparing the theoretical material level with the display material level, and when the deviation of the theoretical material level and the display material level is more than 0.5 meter, alarming the material level of the high-level material bin by the automatic control system.
When the radar level gauge fails, and the displayed level of the radar level gauge is seriously different from the actual level, a process engineer or a post personnel can click a shielding button to shield the failed level gauge, and the radar level count value is not involved in the intra-program control.
When the post inspection personnel actually observe through the on-site bin, and find that the theoretical material level is obviously different from the actual material level, the radar material level count value can be assigned to the theoretical material level by clicking a 'forced' button.
Referring to fig. 4, in a second embodiment, a comprehensive detection system for the stock quantity of an automatic steel-making feeding high-level bin comprises 7 underground bins 3, an underground bin belt 71, a belt scale 6, a first conveying belt 72, a second conveying belt 73, a third conveying belt 74, a second material transporting vehicle 17, 24 high-level bins 9, a feeding PLC1 and a converter PLC15.
The material falls into the feed end of the underground storage bin belt 71 from 7 underground storage bins 3, is weighed through the belt scale 19 on the underground storage bin belt 71, is conveyed to the first conveying belt 72 from the discharge end of the underground storage bin belt 71, is conveyed into the second conveying vehicle 17 through the first conveying belt 72, the second conveying belt 73 and the third conveying belt 74 in sequence, the second conveying vehicle 17 respectively feeds the 12 high-level storage bins 9 in the 1 furnace and the 12 high-level storage bins 9 in the 2 furnace, the material weight of the high-level storage bins is calculated through the feeding PLC and the converter PLC, the theoretical material level of the high-level storage bins is obtained through the logic algorithm of the converter PLC, and is compared with the display material level of the radar material level meter, so that the reliable measurement of the material quantity of the high-level storage bins is realized.
The radar charge level indicator is all installed to 24 high-order feed bin tops, and the weighing hopper is all installed to the below, installs belt weigher 6 on the secret feed bin belt 71, weighs the material through the belt weigher when feeding to high-order feed bin, weighs the material through the weighing hopper when unloading from high-order feed bin.
The specific method comprises the following steps: the material is temporarily stored in a bin corresponding to the material in 7 underground bins through the material transporting vehicle, when the material is required by the high-level bin, the material is weighed through the belt scale and then is transported to the corresponding bin in 24 high-level bins, and when the material corresponding to the high-level bin needs to be added into the converter, the material is weighed through the weighing hopper and then enters the converter. In the process, the material weight of the high-level material bin can be obtained through calculation, the theoretical material level of the high-level material bin is obtained through a logic algorithm, the theoretical material level is compared with the display material level of the radar material level meter, and when the deviation of the theoretical material level and the display material level is more than 0.5 meter, the control system alarms the material level of the high-level material bin.
Similarly, when the radar level gauge fails, the "mask" button may be clicked to mask the failed radar level gauge, and the radar level count value will not participate in the intra-program control. When the theoretical material level is found to be obviously different from the actual material level, a radar material level count value can be assigned to the theoretical material level by clicking a forced button.
The invention has low input cost and strong anti-interference capability, meets the requirement that the high-level bin is always positioned at a safe material level in the automatic feeding process, and avoids the situation of material overflow and material shortage of the high-level bin.
The foregoing has outlined the principles and embodiments of the present application with the understanding that the present application is directed to a method and core idea of the present application. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
Claims (5)
1. A steelmaking automatic feeding high-order feed bin stock volume comprehensive detection system, its characterized in that: contain material loading PLC (1), underground feed bin (3), ground storehouse weigh (4) and shake sieve A (5), belt scale (6), belt (7), radar charge level indicator (8), high-order feed bin (9), material (10), shake sieve B (11), weighing hopper (12), weighing hopper weigh (13), shake sieve C (14), converter PLC (15) and converter (16), be equipped with ground storehouse weigh (4) on underground feed bin (3), the discharge gate of underground feed bin (3) is through shaking sieve A (5) and the feed end matching of belt (7), the feed end of belt (7) is equipped with belt scale (6), the discharge end of belt (7) and high-order feed bin (9) feed inlet phase-match, be equipped with radar charge level indicator (8) on high-order feed bin (9), the discharge gate of high-order feed bin (9) is connected with converter (16) through shaking sieve B (11), weighing hopper (12) and shake sieve C (14); the material storage weight of the high-level bin (9) is calculated through the feeding PLC (1) and the converter PLC (15), the theoretical material level (18) of the high-level bin (9) is obtained through a logic algorithm by the converter PLC (15), and the theoretical material level (18) is compared with the display material level (19) of the radar material level gauge (8), so that the reliable measurement of the material storage amount of the high-level bin (9) is realized.
2. The comprehensive detection system for the stock quantity of the steel-making automatic feeding high-level stock bin is characterized in that: the judgment condition of the material level alarm of the high-level material bin (9) is that the deviation between the theoretical material level (18) of the high-level material bin (9) and the display material level (19) of the radar material level gauge (8) is more than 0.5 meter.
3. The comprehensive detection system for the stock quantity of the steel-making automatic feeding high-level stock bin is characterized in that: an alarm device is arranged in the system, and the alarm device alarms when the data communication between the feeding PLC (1) and the converter PLC (15) is interrupted.
4. A comprehensive detection method for the stock quantity of an automatic steel-making feeding high-level stock bin, which is carried out by adopting the comprehensive detection system according to any one of claims 1-3, and is characterized in that:
when the underground storage bin (3) conveys materials into the high-level storage bin (9) through the belt (7), the carrying capacity of each meter of the belt is measured through the belt scale (6) and recorded into a DB block of the feeding PLC (1), and when the belt (7) moves to a second material transporting vehicle (17) at the feeding port of the high-level storage bin (9), the weight data of the materials are added into the change quantity of the feeding quantity; when the high-level bin (9) is used for discharging the materials to the weighing hopper (12), the weighing hopper is used for weighing, the weight of the batch of materials is obtained, and the load capacity of the batch is added into the discharging variable quantity;
the weight calculation formula of the existing materials in the high-level bin is as follows:
W T ＝W T-1 +W in -W out
wherein W is T Calculating the weight of the existing materials in the periodical high-level bin; w (W) T-1 The weight of the materials stored in the high-level bin is calculated for the previous calculation period; w (W) in The feeding amount change amount in the period is used; w (W) out The change amount of the blanking amount in the period;
the calculation formula of the interconversion of the weight and the volume of the materials in the high-level bin is as follows:
V T calculating the volume of the existing materials in the periodical high-level bin; rho is in i number high-order binThe material density; the inside of the high-level bin is formed by splicing a quadrangular frustum and a quadrangular prism, and the method for mutually converting the volume of the material in the high-level bin and the height of the material level is as follows:
when the material transporting vehicle feeds materials to the quadrangular frustum portion of the high-level bin, a difference value comparison table is used for realizing the mutual conversion of the volume and the height, a section is arranged for each 0.5 meter of the quadrangular frustum portion, the height at the head and the tail of the section is manually measured, and the volume data corresponding to the material level height is recorded and used as a reference point for calculating the difference value; taking the example of volume conversion into height, the difference calculation formula is:
H T the theoretical material level height of the current high-level bin; v (V) max Is V (V) T The volume maximum value in the interval; v (V) min Is V (V) T Minimum volume in the interval, H max For the maximum theoretical material level height of the current high-level bin, H min The theoretical material level height minimum value of the current high-level material bin;
when the volume of the materials in the high-level material bin exceeds the volume of the quadrangular prism part, the material transporting vehicle transports the materials to the quadrangular prism part of the high-level material bin, and the theoretical material level height calculation formula of the high-level material bin is as follows:
V bench Is the volume of a quadrangular frustum pyramid part of the high-level stock bin, V Column The capacity of the quadrangular part of the high-level bin is that k is a certain bin sizing coefficient, the default is 1, and the modification is carried out after sizing; h is a 1 Is the height of the quadrangular prism part of the high-level bin, h 2 The height of the quadrangular frustum pyramid part of the high-level bin is equal to the height of the quadrangular frustum pyramid part of the high-level bin, and V is the volume of the high-level bin.
5. The comprehensive detection method for the stock quantity of the automatic steel-making feeding high-level stock bin is characterized by comprising the following steps of: when the data communication between the feeding PLC (1) and the converter PLC (15) is interrupted, voice alarm is carried out to prompt post personnel to confirm on site, and the calculated value of the theoretical material level does not participate in automatic feeding logic judgment at the moment, so that the occurrence of material overflow and material shortage accidents is avoided.
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