A kind of automatic feeding high silo storage capacity comprehensive detection system and method for steelmaking

Abstract

The present application relates to a kind of automatic feeding high silo storage capacity comprehensive detection system and method of steelmaking, belong to material level detection technical field.The technical scheme is: the discharge port of underground silo (3) is matched with the feeding end of belt (7) by vibrating screen A (5), the feeding end of belt (7) is equipped with belt scale (6), the discharge end of belt (7) is matched with the feeding port of high silo (9), radar material level meter (8) is equipped on high silo (9), the discharge port of high silo (9) is sequentially connected with converter by vibrating screen B, weighing hopper and vibrating screen C;The weight of high silo is calculated by feeding PLC and converter PLC, and the theoretical material level of high silo is obtained by logic algorithm of converter PLC, the display material level of radar material level meter is compared with theoretical material level, and reliable measurement of high silo storage capacity is realized.The present application avoids the accident such as material overflow and material shortage in automatic feeding process, and can maximize the stable operation of converter discharging system.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of automatic feeding high silo storage capacity comprehensive detection system and method of steelmaking, belong to material level detection technical field. BACKGROUND

[0002] The core of the control concept of the existing unmanned automatic feeding system in steel enterprises is to automatically replenish according to the storage capacity of the high silo of the converter, so that the high silo of the converter always maintains a safe material level. Whether the high silo material level measurement is accurate or not is related to whether the entire automatic feeding system can operate normally. Currently, the measurement of the high silo material level only depends on the detection of the radar material level meter. When the material level meter fails due to power failure, wire breakage, or system crash, the automatic feeding system cannot operate normally if there is no other data for comparison, which can easily lead to material overflow or material shortage, seriously affecting the smooth operation of the converter production. SUMMARY

[0003] The purpose of the present application is to provide an automatic feeding high silo storage capacity comprehensive detection system and method for steelmaking, which meets the requirement that the high silo always maintains a safe material level during the automatic feeding process, avoids the situation of material overflow or material shortage in the high silo, and solves the above-mentioned problems in the background art.

[0004] The technical solution of the present application is as follows:

[0005] An automatic feeding high silo storage capacity comprehensive detection system for steelmaking includes a feeding PLC, an underground silo, a ground silo weighing device, a vibrating screen A, a belt scale, a belt, a radar material level meter, a high silo, a material, a vibrating screen B, a weighing hopper, a weighing hopper weighing device, a vibrating screen C, a converter PLC, and a converter. The ground silo weighing device is provided on the underground silo. The discharge port of the underground silo is matched with the feeding end of the belt through the vibrating screen A. The feeding end of the belt is provided with a belt scale. The discharge end of the belt is matched with the feeding port of the high silo. The high silo is provided with a radar material level meter. The discharge port of the high silo is connected with the converter in sequence through the vibrating screen B, the weighing hopper, and the vibrating screen C. The storage weight of the high silo is calculated by the feeding PLC and the converter PLC. The theoretical material level of the high silo is obtained by the logic algorithm of the converter PLC. The displayed material level of the radar material level meter is compared to achieve reliable measurement of the storage capacity of the high silo, so that the high silo always maintains a safe material level and avoids the situation of material overflow or material shortage.

[0006] Further, the judgment condition for the high silo material level alarm is that the deviation between the theoretical material level of the high silo and the displayed material level of the radar material level meter is greater than 0.5 meters.

[0007] Further, an alarm device is provided in the system. When the data communication between the feeding PLC and the converter PLC is interrupted, the alarm device alarms.

[0008] Further, the underground bunker weighing system is compared with the belt scale to obtain the charging amount of the converter high-position bunker.

[0009] A comprehensive detection method for the storage amount of the automatic charging high-position bunker in steelmaking is adopted by the comprehensive detection system, and the steps are as follows:

[0010] When the underground bunker transports materials to the high-position bunker through the belt, the load of each meter of the belt is measured by the belt scale and recorded in the DB block of the charging PLC. When the belt moves to the material transport vehicle II at the feeding port of the high-position bunker, the material weight data is added to the charging amount change; when the high-position bunker discharges to the weighing hopper, the weighing hopper is used for weighing to obtain the weight of the batch of materials, and the batch load is added to the discharging amount change;

[0011] The calculation formula of the existing material weight in the high-position bunker is:

[0012] W T =W T-1 +W in -W out

[0013] Among them, W T is the weight of the existing material in the high-position bunker in this calculation period; W T-1 is the weight of the material stored in the high-position bunker in the last calculation period; W in is the charging amount change in this period; W out is the discharging amount change in this period;

[0014] The calculation formula for converting the weight of the material in the high-position bunker to the volume is:

[0015]

[0016] V T is the volume of the existing material in the high-position bunker in this calculation period; ρ is the material density in the i-th high-position bunker; the high-position bunker is composed of four prisms and four prisms, and the method for converting the volume of the material in the high-position bunker to the material level height is:

[0017] When the material transport vehicle II feeds the four-prism part of the high-position bunker, the difference table is used to realize the conversion between the volume and the height. An interval is set for every 0.5 meters of the four-prism part, and the height at the beginning and end of the interval is manually measured once. The volume data corresponding to the material level height is recorded and used as a reference point for difference calculation. Taking the volume conversion to height as an example, the difference calculation formula is:

[0018]

[0019] H T is the theoretical material level height of the current high-position bunker; Vmax V T V min V T V max V min V

[0020] When the material volume in the high-position stock bin exceeds the volume of the quadrangular frustum part, the material truck feeds the quadrangular prism part of the high-position stock bin, and the theoretical stock level height calculation formula of the high-position stock bin is as follows:

[0021]

[0022] V 合 V 柱 V, k is a material sticking coefficient of a stock bin, by default, 1, and the material sticking is modified; h1 is the height of the quadrangular prism part of the high-position stock bin, h2 is the height of the quadrangular frustum part of the high-position stock bin, and V is the volume of the high-position stock bin.

[0023] Further, when the data communication between the feeding PLC and the converter PLC is interrupted, a voice alarm is given to prompt the on-site personnel to confirm, and at this time, the calculation value of the theoretical stock level does not participate in the automatic feeding logic judgment, so as to prevent the occurrence of material overflow and material shortage accidents.

[0024] Further, the control panel in the system is provided with a "shielding" button and a "forcing" button. When the radar stock level meter fails, the operator can click the "shielding" button to shield the failed stock level meter, and at this time, the radar stock level meter value will not participate in the program control.

[0025] When the on-site inspection personnel find that the calculated theoretical stock level and the actual stock level do not match obviously through the actual observation of the stock bin, the radar stock level meter value can be assigned to the calculated stock level by clicking the "forcing" button.

[0026] The improvement of the present application is that the theoretical stock level of the high-position stock bin is indirectly obtained through the total weight of the feeding, the total weight of the discharging, and the volume of the stock bin, and the feeding PLC calculates and updates the data every 2 seconds.

[0027] The positive effect of the present application is that the theoretical stock level of the high-position stock bin is obtained through a logic algorithm, and is compared with the radar stock level meter display stock level, so as to realize the reliable measurement of the stock amount of the high-position stock bin. The theoretical stock level in the present application is an effective supplement to the radar stock level, and through the comparison of the two stock levels, the safe and stable operation of the entire automatic feeding system is ensured, and the material overflow and material shortage accidents in the automatic feeding process are avoided, so as to maximize the protection of the stable operation of the converter discharging system. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The schematic diagram of the first embodiment of the present application;

[0029] Figure 2 The high-position bin volume parameter in the embodiment of the present application;

[0030] Figure 3 The schematic diagram of the material level in the embodiment of the present application;

[0031] Figure 4 The schematic diagram of the second embodiment of the present application;

[0032] In the figure: 1, the feeding PLC; 2, the first material transport vehicle; 3, the underground bin; 4, the underground bin weighing; 5, the vibrating screen A; 6, the belt scale; 7, the belt; 71, the underground bin belt; 72, the first transport belt; 73, the second transport belt; 74, the third transport belt; 8, the radar material level meter; 9, the high-position bin; 10, the material; 11, the vibrating screen B; 12, the weighing hopper; 13, the weighing of the weighing hopper; 14, the vibrating screen C; 15, the converter PLC; 16, the converter; 17, the second material transport vehicle; 18, the theoretical material level; 19, the displayed material level; 20, the actual material level. DETAILED DESCRIPTION

[0033] The present application will be further described below in combination with the drawings and embodiments:

[0034] The automatic feeding high-position bin material storage quantity comprehensive detection system for steelmaking comprises a feeding PLC 1, an underground bin 3, an underground bin weighing 4, a vibrating screen A 5, a belt scale 6, a belt 7, a radar material level meter 8, a high-position bin 9, a material 10, a vibrating screen B 11, a weighing hopper 12, a weighing of the weighing hopper 13, a vibrating screen C 14, a converter PLC 15 and a converter 16. The underground bin 3 is provided with the underground bin weighing 4. The discharge port of the underground 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 the belt scale 6. The discharge end of the belt 7 is matched with the feeding port of the high-position bin 9. The high-position bin 9 is provided with the radar material level meter 8. The discharge port of the high-position bin 9 is connected with the converter 16 in sequence through the vibrating screen B 11, the weighing hopper 12 and the vibrating screen C 14. The feeding PLC 1 and the converter PLC 15 are used to calculate the material storage weight of the high-position bin 9. The converter PLC 15 obtains the theoretical material level 18 of the high-position bin 9 through a logical algorithm. The theoretical material level 18 is compared with the displayed material level 19 of the radar material level meter 8, so as to realize the reliable measurement of the material storage quantity of the high-position bin 9.

[0035] The judgment condition of the high-position bin 9 material level alarm is that the deviation between the theoretical material level of the high-position bin 9 and the displayed material level of the radar material level meter 8 is greater than 0.5 meters.

[0036] The system is provided with an alarm device. When the data communication between the feeding PLC 1 and the converter PLC 15 is interrupted, the alarm device alarms.

[0037] A kind of automatic feeding high silo storage capacity comprehensive detection method for steelmaking, using the above-mentioned comprehensive detection system, steps are as follows:

[0038] When underground silo 3 transports material to high silo 9 by belt 7, the load of each meter belt is measured by belt scale 6 and recorded in the DB block of feeding PLC1, when belt 7 moves to the material car two 17 at the inlet of high silo 9, the weight data of material is added to the change of feeding amount;When high silo 9 is discharged to weighing hopper 12, the weight of the batch of material is obtained by using the weighing hopper, and the load of the batch is added to the change of discharge amount;

[0039] The weight calculation formula of the existing material in high silo is:

[0040] W T =W T-1 +W in -W out

[0041] Among them, W T is the weight of the existing material in high silo in this calculation period;W T-1 is the weight of the material stored in high silo in the last calculation period;W in is the change of feeding amount in this period;W out is the change of discharge amount in this period;

[0042] The calculation formula of the weight and volume of material in high silo is:

[0043]

[0044] V T is the volume of the existing material in high silo in this calculation period;ρ is the density of the material in the i-th high silo;

[0045] The internal part of high silo is a four-prism cone and a four-prism cylinder, and the method for converting the volume and the material level height in high silo is:

[0046] When the material car two feeds to the four-prism cone part of high silo, the difference table is used to realize the mutual conversion of volume and height, an interval is set for every 0.5 meters of the four-prism cone part, and the height at the beginning and end of the interval is measured manually once, the volume data corresponding to the material level height is recorded, and is used as a reference point for difference calculation;Taking the volume conversion to height as an example, the difference calculation formula is:

[0047]

[0048] H T is the theoretical material level height of the current high silo;V max is V TThe volume maximum in the interval; V min The volume maximum in the interval; V T The volume minimum in the interval, H max The volume maximum in the interval; V min The volume minimum in the interval; V

[0049] When the volume of the material in the high-position bin exceeds the volume of the quadrangular frustum part, the material truck feeds the quadrangular prism part of the high-position bin, and the theoretical material level calculation formula of the high-position bin is:

[0050]

[0051] The volume maximum in the interval; V 合 The volume maximum in the interval; V 注 The volume maximum in the interval; V

[0052] When the data communication between the feeding PLC1 and the converter PLC15 is interrupted, a voice alarm is given to prompt the on-site personnel to confirm, and at this time, the calculation value of the theoretical material level does not participate in the automatic feeding logic judgment, so as to prevent the occurrence of material overflow and material shortage accidents.

[0053] Referring to the accompanying drawings Figure 1 In the first embodiment, the automatic feeding high-position bin material storage amount comprehensive detection system for steelmaking includes a feeding PLC1, a material truck one 2, an underground bin 3, a ground bin scale 4, a vibrating screen A 5, a belt scale 6, a belt 7, a radar material level meter 8, a high-position bin 9, a material 10, a vibrating screen B 11, a weighing hopper 12, a weighing hopper weighing 13, a vibrating screen C 14, a converter PLC15, and a converter 16. The radar material level meter 8 is installed in the high-position bin 9, the material reaches the underground bin 9 through the material truck one 2, and then enters the high-position bin 9 through the vibrating screen A 5, the belt scale 6, and the belt 7. The material in the high-position bin 9 enters the converter 16 through the vibrating screen B 11, the weighing hopper 12, and the vibrating screen C 14. The feeding PLC1 and the converter PLC15 calculate the weight of the material in the high-position bin, the converter PLC15 obtains the theoretical material level 18 of the high-position bin through a logic algorithm, and compares the display material level 19 of the radar material level meter, thereby realizing reliable measurement of the material storage amount of the high-position bin.

[0054] In the embodiment, the specific technical scheme is:

[0055] I. Solve the safety of the automatic feeding control system:

[0056] When the deviation between the theoretical material level and the display material level is greater than 0.5 meters, the automatic control system gives a high-position bin material level alarm.

[0057] II. To solve the measurement accuracy of automatic control system:

[0058] Through the material sticking coefficient, the volume of the silo, the bulk density of the material and other parameters, the accuracy of the theoretical material level of the high silo can be maximized.

[0059] Take the high silo of the converter 1# lime as an example:

[0060] Material sticking coefficient: 1;

[0061] Silo volume: 47.01;

[0062] Lime bulk density: 0.58;

[0063] Belt scale: Model ICS-14B, weighing range 1-800T / H, quantity 1;

[0064] Ground silo weighing sensor: Model CZL-YB-4, range 10T, quantity 4;

[0065] Weighing bucket weighing sensor: Model CZL-YB-4, range 10T, quantity 4;

[0066] When the underground silo transports lime to the high silo by the belt, the load per meter of the belt is measured by the belt scale and recorded in the DB block, and when the belt moves to the second material transport vehicle, the weight data is added to the material loading change amount.

[0067] When the high silo is unloaded to the weighing bucket, the weighing bucket is used to weigh the weight of the batch of lime. The load of the batch is added to the unloading change amount.

[0068] The existing material weight calculation formula in the silo is:

[0069] W T = W T-1 +W in -W out

[0070] Where W T is the weight of the existing material in the silo for this calculation period; W T-1 is the weight of the material stored in the silo for the last calculation period; W in is the material loading change amount for this period; W out is the unloading change amount for this period. The calculation formula for converting the weight of the material in the high silo to the volume is:

[0071]

[0072] V T is the volume of the existing material in the silo for this calculation period; ρ is the density of the material in the i silo.

[0073] The volume of the high-positioned lime bin is shown in the figure Figure 2 The upper part of the high-positioned bin is a quadrangular prism, the upper surface of which is a rectangle with a long side S1 of 5.25 meters and a short side S2 of 1.6 meters, and the height h1 of the prism is 7.9 meters. The lower part is a quadrangular platform, the upper surface of which is the same as that of the quadrangular prism, and the lower surface is a square with a side length S3 of 0.6 meters, and the height h2 of the quadrangular platform is 3.95 meters.

[0074] The method for converting the volume of the material in the high-positioned bin and the height of the material level is as follows:

[0075] When the material truck feeds the quadrangular platform part of the high-positioned bin, the difference table is used to realize the mutual conversion of volume and height. An interval of 0.5 meters is set for the quadrangular platform part, and the height at the beginning and end of the interval is manually measured once, and the volume data corresponding to the height is recorded as the reference point for difference calculation. Taking the conversion of the volume of 1.5m 3 to the height as an example, the table shows that the volume is in the interval of 1m-1.5m of the material level height, and the difference calculation method is as follows:

[0076]

[0077] H T is the current theoretical material level height of the bin; V 例 is the volume value in the example; V 1.5m is the maximum volume in the interval where V 例 is located; V 1m is the minimum volume in the interval where V 例 is located. The conversion of height to volume is the same.

[0078] When the volume of the material in the high-positioned bin exceeds the volume of the quadrangular platform part, the material truck feeds the quadrangular prism part of the high-positioned bin, and the calculation formula for the theoretical material level height of the bin is as follows:

[0079]

[0080] V 台 is the volume of the quadrangular platform part of the high-positioned bin, V 柱 is the volume of the quadrangular prism part of the high-positioned bin, k is a certain bin sticking coefficient, which is 1 by default and is modified after sticking; h1 is the height of the quadrangular prism part of the high-positioned bin, and h2 is the height of the quadrangular platform part of the high-positioned bin.

[0081] At this time, the theoretical material level, the display material level and the actual material level in the high-positioned bin are shown in the figure Figure 3 .

[0082] When the deviation between the theoretical material level and the display material level is greater than 0.5 meters, the automatic control system alarms the material level of the high-positioned bin.

[0083] When a radar level gauge malfunctions and the displayed level is significantly different from the actual level, the process engineer or personnel can click the "Shield" button to shield the faulty level gauge. In this case, the radar level count value will not be included in the program control.

[0084] When on-duty inspectors find a significant discrepancy between the theoretical and actual material levels through on-site observation of the material silos, they can click the "Force" button to assign the radar level count value to the theoretical level.

[0085] See appendix Figure 4 As shown in Embodiment 2, a comprehensive detection system for the storage of high-level silos in steelmaking automatic feeding includes 7 underground silos 3, underground silo belts 71, belt scales 6, conveyor belt 1 72, conveyor belt 2 73, conveyor belt 3 74, material transport vehicle 2 17, 24 high-level silos 9, feeding PLC 1, and converter PLC 15.

[0086] Material falls from seven underground silos 3 into the feed end of the underground silo conveyor belt 71. After being weighed by the belt scale 19 on the underground silo conveyor belt 71, it is transported from the discharge end of the underground silo conveyor belt 71 to the first conveyor belt 72. It is then transported sequentially through the first conveyor belt 72, the second conveyor belt 73, and the third conveyor belt 74 to the second material transport vehicle 17. The second material transport vehicle 17 discharges material into the 12 high-level silos 9 in furnace 1 and the 12 high-level silos 9 in furnace 2. The weight of the material stored in the high-level silos is calculated by the feeding PLC and the converter PLC. The converter PLC obtains the theoretical material level of the high-level silos through a logic algorithm and compares it with the displayed material level of the radar level gauge to achieve reliable measurement of the material storage in the high-level silos.

[0087] Each of the 24 high-level silos is equipped with a radar level gauge above it and a weighing hopper below it. A belt scale 6 is installed on the conveyor belt 71 of the underground silo. When feeding materials into the high-level silos, the materials are weighed by the belt scale, and when discharging materials from the high-level silos, the materials are weighed by the weighing hopper.

[0088] The specific method is as follows: materials are temporarily stored in the corresponding material silos of the seven underground silos via transport vehicles. When there is a demand for materials in the high-level silos, they are weighed by belt scales and then transported to the corresponding silos in the 24 high-level silos. When the converter needs to add the corresponding material from this high-level silo, the material is weighed by a weighing hopper and then enters the converter. During this process, the weight of the material stored in the high-level silos can be calculated, and then the theoretical material level of the high-level silos can be obtained through a logical algorithm. The theoretical material level is compared with the material level displayed by the radar level gauge. When the deviation between the two is greater than 0.5 meters, the control system will issue a high-level silo level alarm.

[0089] When the radar level meter is in failure, the "shield" button can be clicked to shield the failure radar level meter, and at this time, the radar level meter value will not participate in the program control. When the theoretical level and the actual level are found to be obviously inconsistent, the radar level meter value can be assigned to the theoretical level by clicking the "force" button.

[0090] The application has low investment cost and strong anti-interference ability, meets the requirement that the high-level stock bin is always in a safe level during the automatic feeding process, and avoids the situation that the high-level stock bin has material overflow or material shortage.

[0091] The above describes the principles and implementation manners of the application by using specific examples, and the above example description is only used to help understand the method and core idea of the application. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A kind of automatic feeding high silo storage capacity comprehensive detection method for steelmaking, it is carried out using the following comprehensive detection system, the comprehensive detection system includes feeding PLC (1), underground bunker (3), ground bunker weighing (4) and vibration sieve A (5), belt scale (6), belt (7), radar level gauge (8), high silo (9), material (10), vibration sieve B (11), weighing hopper (12), weighing hopper weighing (13), vibration sieve C (14), converter PLC (15) and converter (16), the ground bunker (3) is equipped with ground bunker weighing (4), the discharge port of underground bunker (3) is matched with the feeding end of belt (7) by vibration sieve A (5), the feeding end of belt (7) is equipped with belt scale (6), the discharge end of belt (7) is matched with the feeding port of high silo (9), the discharge port of high silo (9) is connected with converter (16) in sequence through vibration sieve B (11), weighing hopper (12) and vibration sieve C (14); the weight of high silo (9) is calculated by feeding PLC (1) and converter PLC (15), the theoretical level (18) of high silo (9) is obtained by converter PLC (15) through logic algorithm, the theoretical level (18) is compared with the display level (19) of radar level gauge (8), and the reliable measurement of the storage capacity of high silo (9) is realized; characterized in that When underground bunker (3) transports material into high silo (9) by belt (7), the load weight per meter of belt is measured by belt scale (6) and recorded in the DB block of feeding PLC (1), when belt (7) moves to the material car two (17) at the feeding port of high silo (9), the material weight data is added to the change amount of feeding quantity;When high silo (9) discharges to weighing hopper (12), the weight of this batch of material is obtained by using weighing hopper weighing, and the load weight of this batch is added to the change amount of discharging quantity; The calculation formula of the present material weight in high silo is as follows: = ； wherein, the weight of the material present in the high position silo is calculated for the period; the weight of the material present in the high position silo for the previous calculation period; the change in the amount of material fed in for the period; the change in the amount of material fed out for the period; The calculation formula of the volume and weight of material in high silo is as follows: ； The volume of the existing material in the high silo is calculated for this cycle; p is the density of the material in the i-th high silo; The inside of high silo is composed of four-prism table and four-prism column, and the method for converting the volume and level height of material in high silo is as follows: When the material car feeds material to the four-prism table part of high silo, the difference contrast table is used to realize the mutual conversion of volume and height, an interval is set for every 0.5 meter of four-prism table part, and the height at the head and tail of the interval is measured manually once, the volume data corresponding to the height is recorded and used as a reference point for difference calculation;Taking the conversion of volume to height as an example, the difference calculation formula is as follows: ； is the current high silo theoretical fill level height; is is the maximum volume in the interval, is is the minimum volume in the interval, is the current high silo theoretical fill level height maximum, is the current high silo theoretical fill level height minimum; When the volume of material in high silo exceeds the volume of four-prism table part, the material car feeds material to the four-prism column part of high silo, and the calculation formula of the theoretical level height of high silo is as follows: ； is the volume of the quadrangular frustum part of the high-position bin, is the volume of the quadrangular prism part of the high-position bin, is the sticking coefficient of a certain bin, and the default value is 1, which is modified after sticking; is the height of the quadrangular prism part of the high-position bin, is the height of the quadrangular frustum part of the high-position bin, is the volume of the high-position bin.

2. The automatic feeding high-position stock bin stock quantity comprehensive detection method according to claim 1, characterized in that: When the data communication between feeding PLC (1) and converter PLC (15) is interrupted, voice alarm is given to prompt the post personnel to confirm on site, at this time, the calculation value of theoretical level does not participate in the automatic feeding logic judgment, so as to prevent the occurrence of material shortage and excess.

3. The automatic feeding high-position stock bin stock quantity comprehensive detection method according to claim 1, characterized in that: The judgment condition of the high-position stock bin (9) stock level alarm is that the deviation between the theoretical stock level (18) of the high-position stock bin (9) and the displayed stock level (19) of the radar stock level meter (8) is greater than 0.5 meters.

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