Steel billet on-line weighing and metering device and control method
The device for detecting the position and speed of the billet by lifting the weighing frame and multi-sensors is solved, and the problem of low online weighing efficiency in the prior art is achieved, and the rapid and accurate weighing and morphology information of each billet is achieved. Acquisition improves the energy consumption regulation and billet temperature management of the process.
Patent Information
- Application Number
- CN202411451920.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2024-12-31
AI Technical Summary
The existing billet online weighing measurement method is inefficient and cannot accurately weigh each billet in real time, resulting in the subsequent station being unable to adjust the energy consumption in time, and the billet temperature is reduced, increasing energy consumption.
A billet online weighing metering device including a fixing frame, a hydraulic lifting column, multiple sensors and a conveying mechanism is designed. The weighing metering is carried out by lifting the weighing chassis through the hydraulic lifting column, and the position of the billet is detected by multiple sets of sensors and Speed, calculate its length and shape, and achieve accurate weight measurement and acquisition of morphological information.
It realizes rapid and accurate weighing of each billet, reduces heat loss, improves weighing efficiency, and provides real-time billet morphology information to assist in subsequent process operations.
Smart Images
Figure CN119223407A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an online steel billet weighing metering device and a control method, and in particular to an online steel billet weighing metering device and a control method applied in the field of steelmaking weighing equipment. Background Art
[0002] The accuracy and efficiency of billet weighing in steel mills have a great impact on the operation and energy consumption of subsequent heating furnace stations, and even affect the quality of the final steel products. At present, the billet weighing is mostly carried out by overhead cranes to weighing and measuring equipment for weighing, or by installing platform weighing equipment in the billet roller table for weighing.
[0003] In order to solve the problem of weighing and measuring steel billets online, a certain weighing and measuring device on the market adopts a hanging weighing design and has a certain market share.
[0004] The specification of Chinese patent CN204405156U discloses a new type of online weighing electronic scale for continuous casting steel billets. The electronic scale changes the original weighing of each weighing sensor to the weighing of the whole weighing platform. No matter how much the curvature of the steel billet is or whether it is overweight, the weighing platform can ensure that the two weighing sensors are evenly stressed, ensuring the measurement accuracy. The weighing accuracy is controlled within 3‰, which is lower than the steel rolling process requirements. The utility model has good weighing stability and repeatability, low equipment failure rate, and accurate measurement, which greatly meets the needs of steel rolling production. The utility model has a reasonable design and ingenious conception, filling the gap of this type of process scale and is worthy of wide promotion and application.
[0005] However, the existing weighing and metering method is inefficient and can only randomly select steel billets for weighing, which cannot meet the requirement of weighing every steel billet. As a result, the subsequent workstations cannot adjust the energy consumption according to the weight of the steel billets in real time. In addition, due to time reasons, the temperature of the weighed steel billets decreases and the energy consumption increases. Summary of the invention
[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to quickly and accurately weigh and measure each steel billet.
[0007] In order to solve the above problems, the present invention provides a billet online weighing metering device and control method, comprising a fixed frame, the fixed frame comprising two rows of symmetrically distributed columns, and the upper ends of the two rows of columns are fixedly connected to a main frame at the same time, a weighing frame is installed on the fixed frame, the weighing frame comprises a horizontal bracket installed above the main frame, the four corners of the horizontal bracket are connected to the weighing bracket, and the weighing bracket penetrates the main frame and extends to the bottom, a weighing roller is connected between two opposite weighing brackets, and the side wall of the weighing bracket is fixedly connected to a self-locking rotating part rotatably connected to the weighing roller, a plurality of hydraulic lifting columns are installed on the upper end of the main frame, and the plurality of hydraulic lifting columns are distributed on the horizontal bracket At the four corners, weighing sensors are installed at the output ends of the hydraulic lifting columns, and the upper surface of the weighing sensors is in contact with the lower surface of the horizontal bracket, a conveying mechanism is installed on the ground below the fixed frame, a position and speed detection sensor 1 and a position and speed detection sensor 2 are installed in the feed port direction of the fixed frame, and the position and speed detection sensor 1 and the position and speed detection sensor 2 are distributed at intervals, a gantry is also installed around the position and speed detection sensor 2, and the position and speed detection sensor 2 is installed on the side column of the gantry, a width measurement sensor is installed on the frame of the position and speed detection sensor 2, and a thickness measurement sensor is installed in the middle position of the horizontal column of the gantry.
[0008] In the above-mentioned billet online weighing and metering device and control method, the online billet is weighed before it enters the heating furnace, which reduces the weighing time, improves efficiency and reduces heat loss.
[0009] As a further improvement of the present application, the conveying mechanism includes two trusses, and a plurality of equally spaced conveying rollers are installed on the two trusses. A variable frequency motor is installed on one side of each conveying roller, and a coupling is connected between the output end of the variable frequency motor and the conveying roller. The variable frequency motor drives the conveying roller to rotate through the coupling to complete the conveying of the steel billet, and the speed of each variable frequency motor can be adjusted and controlled, so that the speed and time of the steel billet conveying can be controlled.
[0010] As a further improvement of the present application, the main frame is located on both sides of the upper end side walls of the horizontal bracket, and the upper ends of the limit columns are fixedly connected to the limit pads. The side walls of the horizontal bracket are fixedly connected to the mounting frame, and the mounting frame is threaded with bolts. The lower ends of the bolts are against the limit pads, and the lower ends of the bolts are resting on the limit pads. The two rely on friction resistance to limit the horizontal movement of the horizontal bracket to prevent the horizontal movement distance of the horizontal bracket from being too large to damage the hydraulic cylinder and weighing sensor of the hydraulic lifting column.
[0011] As a further improvement of the present application, both ends of the weighing roller are fixedly connected with a rotating shaft, and the side wall of the self-locking rotating part is provided with a rotating groove matching the rotating shaft, the upper inner wall of the self-locking rotating part is provided with a mounting groove connected with the rotating groove, and an electromagnet is installed on the upper end of the mounting groove, and the inner wall of the mounting groove is slidably connected with a positioning ring that magnetically repels the electromagnet, and an elastic reset pull belt is fixedly connected between the side walls on both sides of the upper end of the positioning ring and the groove wall of the mounting groove. During the process of conveying the steel billet by the conveying mechanism, the elastic reset pull belt restrains the positioning ring to separate it from the rotating shaft, and when weighing and measuring, the electromagnet is turned on to generate magnetic force to repel the positioning ring downward, so that the positioning ring is tightly fitted with the rotating shaft, and the rotating shaft is locked by friction resistance to prevent the steel billet from rolling off the weighing roller due to tilting during the weighing process.
[0012] As another improvement of the present application, the positioning rings are made of friction-resistant material with a large friction coefficient, and the outer surface of the rotating shaft facing the positioning ring is frosted. The magnetic repulsion force of the electromagnet on the positioning ring is used to press the positioning ring onto the rotating shaft. In this way, the friction resistance between the positioning ring and the rotating shaft can lock the rotating shaft to prevent the rotating shaft from rotating at will, thereby effectively preventing the steel billet from rolling off the weighing roller, thereby effectively improving the safety of the weighing and metering process.
[0013] As another improvement of the present application, the control method of the metering device includes the following steps: S1, the conveying mechanism conveys the billet forward. When the head and tail of the billet pass through the position and speed detection sensor 2, the control system measures the exact time t of the billet passing, and then multiplies t by the billet running speed to obtain the billet length L0. The billet running speed is obtained through the operating parameters of the conveying mechanism; S2, the distance from the position and speed detection sensor 1 to the vertical center of the weighing frame is set to L1, and L1 is a fixed value calculated in advance during design. The billet continues to move forward. When the head of the billet passes the position and speed detection sensor 1, the control system can calculate the distance L2 between the center of the billet and the vertical center of the weighing frame based on the measured billet lengths L0 and L1. L2=L1+(L0) / 2; S3, the control system adjusts the running speed and time of the steel billet on the conveying mechanism according to the value of L2, until the speed of the steel billet is exactly zero when it runs the distance L2, at which time the center of the steel billet and the weighing vertical center of the weighing frame are basically coincident, which is convenient for the next step of weighing; S4, after the billet stops in place, the control system sends a command to start the hydraulic lifting column to work. The hydraulic lifting column lifts the scale, and the weighing frame drives the billet to leave the conveying mechanism and rise a certain distance before stopping in place. At this time, the weight of the billet is measured and weighed by the weighing sensor, and the weighing sensor transmits the measured and weighed data to the control system for corresponding calculations. After the measurement and weighing are completed, the hydraulic lifting column drives the weighing frame to descend to its original position. Finally, the control system controls the conveying mechanism to drive the billet to continue to move forward.
[0014] In summary, the use of the hydraulic lifting column to lift the weighing frame to lift the billet for weighing can quickly and accurately weigh each billet on the line, with short time and high efficiency, effectively reducing the heat loss of the billet. Multiple sets of sensors are used to detect the position and speed of the billet to calculate the length of the billet, and then control and adjust the conveying speed of the billet so that when the billet stops moving, its center coincides with the vertical center of the weighing frame, thereby accurately measuring the weight of the billet. In addition, width and thickness measuring sensors are used to measure the width and thickness of each billet to obtain information on the overall shape of the billet and send it to the downstream process, which can assist personnel in grasping the overall shape of the billet at the first time and can well cope with the processing of special-shaped billets. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a three-dimensional diagram of the entire measuring and weighing device according to the first embodiment of the present application; Figure 2 A three-dimensional diagram of a weighing device according to a first embodiment of the present application; Figure 3 This is a main diagram of a weighing frame according to a first embodiment of the present application; Figure 4 This is a front view of the weighing frame of the first embodiment of the present application; Figure 5 Figure 1 The enlarged view of point A in the middle; Figure 6 Figure 1 The enlarged view of point B in the middle; Figure 7 A three-dimensional diagram of a conveying mechanism according to a first embodiment of the present application; Figure 8 This is a schematic diagram of the weighing and metering control principle of the first embodiment of the present application; Fig. 9 A cross-sectional view of a self-locking rotating member according to a second embodiment of the present application; Fig.10 for Fig. 9 Enlarged view of point C in the middle.
[0016] Description of the numbers in the figure: 1 fixed frame, 101 column, 102 main frame, 2 weighing frame, 201 horizontal bracket, 202 weighing bracket, 203 weighing roller, 204 self-locking rotating part, 3 hydraulic lifting column, 4 weighing sensor, 5 conveying mechanism, 501 truss, 502 conveying roller, 503 frequency conversion motor, 504 coupling, 6 position and speed detection sensor 1, 7 position and speed detection sensor 2, 701 width measurement sensor, 8 thickness measurement sensor, 9 limit column, 901 limit pad, 10 mounting frame, 11 bolt, 12 rotating shaft, 13 electromagnet, 14 positioning ring, 15 elastic reset pull belt, 16 gantry. DETAILED DESCRIPTION
[0017] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.
[0018] The first implementation method: Figure 1 , 2 , 3, 4 and Figure 5 As shown, it includes a fixed frame 1, the fixed frame 1 includes two rows of symmetrically distributed columns 101, and the upper ends of the two rows of columns 101 are fixedly connected to the main frame 102 at the same time, and a weighing frame 2 is installed on the fixed frame 1, and the weighing frame 2 includes a horizontal bracket 201 installed above the main frame 102, and the four corners of the horizontal bracket 201 are connected to the weighing bracket 202, and the weighing bracket 202 passes through the main frame 102 and extends to the bottom, and a weighing roller 203 is connected between the two opposite weighing brackets 202, and the side wall of the weighing bracket 202 is fixed. A self-locking rotating member 204 rotatably connected to the weighing roller 203 is connected, and a plurality of hydraulic lifting columns 3 (the prior art, the specific model is selected according to actual needs, and will not be described in detail here) are installed on the upper end of the main frame 102, and the plurality of hydraulic lifting columns 3 are distributed at the four corners of the horizontal bracket 201, and a weighing sensor 4 (the prior art, the specific model is selected according to actual needs, and will not be described in detail here) is installed at the output end of the hydraulic lifting column 3, and the upper surface of the weighing sensor 4 is in contact with the lower surface of the horizontal bracket 201; Figure 1 , 7 As shown, a conveying mechanism 5 is installed on the ground below the fixed frame 1, and the conveying mechanism 5 includes two trusses 501, and a plurality of conveying rollers 502 with equal spacing are installed on the two trusses 501, and a variable frequency motor 503 (which is the prior art, and the specific model is selected according to actual needs, and will not be described in detail here) is installed on one side of each conveying roller 502, and a coupling 504 is connected between the output end of the variable frequency motor 503 and the conveying roller 502, and the variable frequency motor 503 drives the conveying roller 502 to rotate through the coupling 504, so as to complete the conveying work of the steel billet, and the speed of each variable frequency motor 503 can be adjusted and controlled, so that the speed and time of the steel billet conveying can be well controlled; Figure 1 It is shown that a position and speed detection sensor 1 6 and a position and speed detection sensor 2 7 are installed in the feed port direction of the fixed frame 1 (the specific working structure and principle are well-known technologies for technicians in the relevant fields, and the specific model of the sensor is selected according to actual needs, which will not be described in detail here), and the position and speed detection sensor 1 6 and the position and speed detection sensor 2 7 are spaced apart, and a gantry 16 is also installed on the periphery of the position and speed detection sensor 2 7, and the position and speed detection sensor 2 7 is installed on the side column of the gantry 16, and a width measurement sensor 701 is installed on the frame of the position and speed detection sensor 2 7 (the specific working structure and principle are well-known technologies for technicians in the relevant fields, and the specific model of the sensor is selected according to actual needs, which will not be described in detail here), and a thickness measurement sensor 8 is installed in the middle position of the horizontal column of the gantry 16 (the specific working structure and principle are well-known technologies for technicians in the relevant fields, and the specific model of the sensor is selected according to actual needs, which will not be described in detail here); Figure 1 , 4 and Figure 8 It is shown that the control method of the metering device includes the following steps: S1, the conveying mechanism 5 conveys the billet forward. When the head and tail of the billet pass through the position and speed detection sensor 7, the control system measures the exact time t of the billet passing, and then multiplies t by the speed of the billet to obtain the length L0 of the billet. The speed of the billet is obtained through the operating parameters of the conveying mechanism 5; S2, the distance from the position and speed detection sensor 6 to the vertical center of the weighing frame 2 is set to L1, and L1 is a fixed value calculated in advance during design. The billet continues to move forward. When the head of the billet passes the position and speed detection sensor 6, the control system can calculate the distance L2 between the center of the billet and the vertical center of the weighing frame 2 based on the measured billet lengths L0 and L1. L2=L1+(L0) / 2; S3, the control system adjusts the running speed and time of the steel billet on the conveying mechanism 5 according to the value of L2, until the speed of the steel billet is exactly zero when the steel billet runs the distance L2, at which time the center of the steel billet and the weighing vertical center of the weighing frame 2 are basically coincident, which is convenient for the next step of weighing; S4, after the billet stops in place, the control system sends a command to start the hydraulic lifting column 3 to start working. The hydraulic lifting column 3 lifts the weighing frame 2, and the weighing frame 2 drives the billet to leave the conveying mechanism 5 and rise a certain distance before stopping in place. At this time, the weight of the billet is measured and weighed by the weighing sensor 4, and the weighing sensor 4 transmits the measured and weighed data to the control system for corresponding calculations. After the measurement and weighing are completed, the hydraulic lifting column 3 drives the weighing frame 2 to descend to its original position, and finally the control system controls the conveying mechanism 5 to drive the billet to continue to move forward.
[0019] The second implementation method: Figure 1 , 6 As shown, the main frame 102 is located on both sides of the upper side walls of the horizontal bracket 201, and multiple limit columns 9 are fixedly connected, and the upper ends of the limit columns 9 are fixedly connected to the limit pads 901, and the side walls of the horizontal bracket 201 are fixedly connected to the mounting frame 10, and the mounting frame 10 is threadedly connected with bolts 11, the lower ends of the bolts 11 are against the limit pads 901, and the lower ends of the bolts 11 are supported on the limit pads 901, and the two rely on friction resistance to limit the horizontal movement of the horizontal bracket 201, so as to prevent the horizontal movement distance of the horizontal bracket 201 from being too large to damage the hydraulic cylinder and the weighing sensor 4 of the hydraulic lifting column 3; Figure 3 , 9 and Fig.10 As shown, both ends of the weighing roller 203 are fixedly connected with a rotating shaft 12, and the side wall of the self-locking rotating member 204 is provided with a rotating groove matching the rotating shaft 12, the upper inner wall of the self-locking rotating member 204 is provided with a mounting groove connected to the rotating groove, and the upper end of the mounting groove is installed with an electromagnet 13 (the specific model is selected according to actual needs and is not described in detail here), the inner wall of the mounting groove is slidably connected with a positioning ring 14 that magnetically repels the electromagnet 13, the positioning ring 14 is made of a friction-resistant material with a large friction coefficient (composite fiber material is preferably used, and other materials can also be selected according to actual needs), and the outer surface of the rotating shaft 12 facing the positioning ring 14 is frosted, and the magnetic repulsion force of the electromagnet 13 on the positioning ring 14 is used to press the positioning ring 14 on the rotating shaft 12, so that the positioning ring 14 and the rotating shaft 12 are connected. The friction resistance between the two ends can lock the rotating shaft 12 to prevent the rotating shaft 12 from rotating at will, thereby effectively preventing the steel billet from rolling down from the weighing roller 203, effectively improving the safety during the weighing and metering process, and an elastic reset drawstring 15 (polyurethane elastic material is preferably used, and other materials can also be selected according to actual needs) is fixedly connected between the side walls on both sides of the upper end of the positioning ring 14 and the groove wall of the installation groove. When the conveying mechanism 5 conveys the steel billet, the elastic reset drawstring 15 restrains the positioning ring 14 to separate it from the rotating shaft 12, and when weighing and metering, the electromagnet 13 is turned on to generate magnetic force to repel the positioning ring 14 downward, so that the positioning ring 14 and the rotating shaft 12 are closely fitted, and the rotating shaft 12 is locked by relying on the friction resistance to prevent the steel billet from rolling down from the weighing roller 203 due to tilting during the weighing process.
[0020] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.
Claims
1. A billet weighing and metering device, characterized in that: The invention comprises a fixed frame (1), wherein the fixed frame (1) comprises two rows of symmetrically distributed columns (101), and the upper ends of the two rows of columns (101) are simultaneously fixedly connected to a main frame (102); a weighing frame (2) is installed on the fixed frame (1), and the weighing frame (2) comprises a horizontal bracket (201) installed above the main frame (102); the four corners of the horizontal bracket (201) are connected to weighing brackets (202), and the weighing brackets (202) penetrate the main frame (102) and extend downward; a weighing roller (203) is connected between two opposite weighing brackets (202), and a self-locking rotating member (204) rotatably connected to the weighing roller (203) is fixedly connected to the side wall of the weighing bracket (202); a plurality of hydraulic lifting columns (3) are installed on the upper end of the main frame (102), and the plurality of hydraulic lifting columns (3) are distributed on the horizontal bracket (201). 1), a weighing sensor (4) is installed at the output end of the hydraulic lifting column (3), and the upper surface of the weighing sensor (4) is in contact with the lower surface of the horizontal support (201), a conveying mechanism (5) is installed on the ground below the fixed frame (1), a position and speed detection sensor 1 (6) and a position and speed detection sensor 2 (7) are installed in the direction of the feed inlet of the fixed frame (1), and the position and speed detection sensor 1 (6) and the position and speed detection sensor 2 (7) are distributed at intervals, a gantry (16) is also installed on the periphery of the position and speed detection sensor 2 (7), and the position and speed detection sensor 2 (7) is installed on the side column of the gantry (16), a width measurement sensor (701) is installed on the frame of the position and speed detection sensor 2 (7), and a thickness measurement sensor (8) is installed in the middle position of the horizontal column of the gantry (16).
2. The steel billet online weighing and metering device according to claim 1, characterized in that: The conveying mechanism (5) comprises two trusses (501), and a plurality of conveying rollers (502) distributed at equal intervals are mounted on the two trusses (501); a variable frequency motor (503) is mounted on one side of each conveying roller (502), and a coupling (504) is connected between the output end of the variable frequency motor (503) and the conveying roller (502).
3. The steel billet online weighing and metering device according to claim 1, characterized in that: The upper side walls of both sides of the main frame (102) located on the horizontal bracket (201) are fixedly connected to a plurality of limit columns (9), and the upper ends of the limit columns (9) are fixedly connected to limit pads (901). The side walls of the horizontal bracket (201) are fixedly connected to a mounting frame (10), and the mounting frame (10) is threadedly connected to a bolt (11), and the lower end of the bolt (11) abuts against the limit pad (901).
4. The steel billet online weighing and metering device according to claim 1, characterized in that: Both ends of the weighing roller (203) are fixedly connected to a rotating shaft (12), and a rotating groove matching the rotating shaft (12) is provided on the side wall of the self-locking rotating member (204), a mounting groove connected to the rotating groove is provided on the inner wall of the upper end of the self-locking rotating member (204), and an electromagnet (13) is installed on the upper end of the mounting groove, and a positioning ring (14) that magnetically repels the electromagnet (13) is slidably connected to the inner wall of the mounting groove, and an elastic reset pull belt (15) is fixedly connected between the side walls on both sides of the upper end of the positioning ring (14) and the groove wall of the mounting groove.
5. The steel billet online weighing and metering device according to claim 4, characterized in that: The positioning ring (14) is made of a friction-resistant material with a large friction coefficient, and the outer surface of the rotating shaft (12) facing the positioning ring (14) is frosted.
6. The steel billet online weighing and metering device according to claim 1, characterized in that: The control method of the metering device comprises the following steps: S1, the conveying mechanism (5) conveys the billet forward. When the head and tail of the billet pass through the position and speed detection sensor 2 (7), the control system measures the exact time t of the billet passing through, and then multiplies t by the speed of the billet to obtain the length L0 of the billet. The speed of the billet is obtained through the operating parameters of the conveying mechanism (5); S2, the distance from the position and speed detection sensor 1 (6) to the vertical center of the weighing frame (2) is set to L1, and L1 is a fixed value calculated in advance during design. The billet continues to move forward. When the head of the billet passes the position and speed detection sensor 1 (6), the control system can calculate the distance L2 between the center of the billet and the vertical center of the weighing frame (2) based on the measured billet lengths L0 and L1, where L2=L1+(L0) / 2; S3, the control system adjusts the running speed and time of the steel billet on the conveying mechanism (5) according to the value of L2, until the speed of the steel billet is exactly zero when the steel billet runs the distance L2, at which time the center of the steel billet and the weighing vertical center of the weighing frame (2) are basically coincident, which is convenient for the next weighing work; S4, after the billet stops at the designated position, the control system sends a command to start the hydraulic lifting column (3) to start working. The hydraulic lifting column (3) lifts the weighing frame (2), and the weighing frame (2) drives the billet to leave the conveying mechanism (5) and rise a certain distance before stopping at the designated position. At this time, the weight of the billet is measured and weighed by the weighing sensor (4). The weighing sensor (4) transmits the measured and weighed data to the control system for corresponding calculation. After the measured and weighed data is completed, the hydraulic lifting column (3) drives the weighing frame (2) to descend to the original position. Finally, the control system controls the conveying mechanism (5) to drive the billet to continue to move forward.