Offline steel billet weighing device and method

Abstract

The invention relates to an offline billet weighing device and method, and belongs to the technical field of steelmaking equipment and methods. According to the technical scheme, a positioning sleeve (4) and a supporting cross beam (3) are installed on the upper portion of a hydraulic cylinder (5), and the lower portion of a lifting type bearing table (1) is welded to a socket and spigot type guide sleeve (6); the weighing platform (12) is installed on the weighing platform base (10), a gap is formed between the weighing platform (12) and the lifting type bearing table (1) in the working state, the sensor (11) is arranged between the weighing platform (12) and the weighing platform base (10), the weighing platform limiting device (13) is arranged above the weighing platform (12), and the sensor (11) is connected with an electrical instrument system. The method has the beneficial effects of being high in precision, small in deviation, high in fixed weight quality and low in cost, and reducing the steel billet quality loss.

Description

Technical Field

[0001] The present invention relates to an offline billet weighing device and method, belonging to the technical field of steelmaking equipment and methods. Background Art

[0002] At present, on the steel billet production line, the transported steel billets often need to be weighed online. The weighing devices in the prior art are usually arranged under the roller table frame. When the steel billets are transported, the impact on the sensors is large, and the working environment of the sensors is harsh. Sometimes the weighing error of the steel billets reaches ±30 kg. Application No. 201410286342.4 discloses a lifting roller table steel billet weighing device. The weighing frame is located directly above the lifting frame, and the weighing frame is connected to the lifting frame through a weighing module. It is a lifting roller table steel billet weighing device and does not solve the problem of the accuracy of the weighing sensor. The reasons for the low accuracy of the steel billet weighing quality may be as follows: (1) The weighing time is insufficient and the reading is inaccurate, resulting in a large weighing error; (2) Being in a high-temperature environment for a long time, the weighing equipment is prone to aging, the system stability is poor, the service life is reduced, and the weighing accuracy is affected; (3) Factors such as impact load, vibration, and temperature change will affect the accuracy of the weighing sensor. These measurement deviations are very likely to cause the product quality to fail to meet the standards, affect the use performance and safety of the product, and will also cause economic losses to the product. At the same time, once a sensor failure occurs, the maintenance of the online weighing system is difficult and the normal production is affected. Summary of the Invention

[0003] The purpose of the present invention is to provide an offline billet weighing device and method. By matching the lifting support table with the weighing platform and adopting the socket-type guide sleeve design and the limiting structure, the weighing quality of the steel billets can be made to float up and down to 0.5 kg, with high precision, small deviation, high fixed-weight quality, low cost, reduced steel billet quality loss, and effectively solve the above problems existing in the background art.

[0004] The technical solution of the present invention is: an offline billet weighing device, comprising a lifting support system, a weighing system, a hydraulic system, and an electrical instrument system. The lifting support system comprises a lifting support table, a limiting structure, a hydraulic cylinder, and a socket-type guide sleeve. The hydraulic cylinder is connected to the hydraulic system. The hydraulic cylinder is installed on the bottom plate. A positioning sleeve and a support cross beam are installed on the upper part of the hydraulic cylinder. A movable base is welded below the support cross beam. The socket-type guide sleeve is welded on the movable base. The lifting support table is installed above the support cross beam. The limiting structure is welded on the lifting support table. The lower part of the lifting support table is welded to the socket-type guide sleeve; The weighing system includes sensors, a weighing platform, weighing platform limiters, and a weighing platform base. The weighing platform is installed on the weighing platform base. There is a gap between the weighing platform and the lifting support table in the working state. The sensors are set between the weighing platform and the weighing platform base. The weighing platform limiters are set above the weighing platform. The sensors are connected to the electrical instrument system.

[0005] The lifting support system also includes a movable base limiter and a fixed guiding support. The movable base limiter and the fixed guiding support are installed on the bottom plate. The movable base limiter is set on both sides of the hydraulic cylinder and matches the position of the movable base. The fixed guiding support is set outside the movable base limiter, and the upper part of the fixed guiding support is connected to the movable base.

[0006] There are two limiting structures, which are set at the central position of the lifting support table.

[0007] There are four socket-type guiding sleeves, which are evenly distributed at the four corner positions below the lifting support table.

[0008] The sensors are 0.1-level 3t sensors. There are six sensors, with three sensors in a group. The electrical instrument system includes a transmitter and a digital display screen. The six sensors are connected in parallel and then connected to the transmitter. The data line of the transmitter is connected to the digital display screen.

[0009] The hydraulic system includes an oil tank, a valve group, a hydraulic pump, and hydraulic pipelines. The hydraulic pipelines are connected to the hydraulic cylinder.

[0010] The hydraulic pump is a synchronous hydraulic motor.

[0011] An offline billet weighing method includes the following steps: (1) Debug and calibrate the sensors; (2) Start the hydraulic pump, operate the up-start button, and raise the lifting support table; (3) Use a crane to place the billet to be measured at the central position of the lifting support table; (4) Operate the down-start button of the hydraulic system, start to lower the lifting support table, place the billet on the weighing platform, and display the weighing data; (5) Operate the up-start button of the hydraulic system, start to raise the lifting support table, and separate the billet from the weighing platform; (6) Use a crane to move the billet out of the lifting support table.

[0012] The step (1) includes the following steps: Start the hydraulic pump, operate the up button, raise the lifting support table, use the overhead crane to place the weight billet at the center position of the lifting support table, calibrate the transmitter to zero, and repeat the calibration several times until the digital display shows the zero state; operate the down button of the hydraulic system, start to lower the lifting support table, after placing the billet on the weighing platform, start to calibrate the weight billet, and repeat the calibration several times until the digital display shows that the weight of the weight billet remains unchanged or fluctuates up and down within an error of 0.5 kg.

[0013] There is a certain distance between the weighing platform and the lifting support table, and they should not be in contact.

[0014] Six sensors are provided, and three sensors are used as a group to maintain stability.

[0015] The beneficial effects of the present invention are as follows: By matching the use of the lifting support table and the weighing platform, and adopting the socket-type guiding sleeve design and the limiting structure, the weighing quality of the billet can be reduced to fluctuate up and down within 0.5 kg, with high precision, small deviation, high fixed-weight quality, low cost, and reduced quality loss of the billet. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the lifting support system of the present invention; Figure 3 is the structural schematic diagram of the weighing system of the present invention; In the figure: lifting support table 1, limiting structure 2, support cross beam 3, positioning sleeve 4, hydraulic cylinder 5, socket-type guiding sleeve 6, movable base 7, movable base limit 8, fixed guiding support 9, weighing platform base 10, sensor 11, weighing platform 12, weighing platform limit 13. Detailed Embodiments

[0017] In order to make the purpose, technical solutions and advantages of the invention implementation cases clearer, the technical solutions in the implementation cases of the present invention will be clearly and completely described below in conjunction with the drawings in the implementation cases. Obviously, the described implementation cases are a small part of the implementation cases of the present invention, rather than all of the implementation cases. Based on the implementation cases of the present invention, all other implementation cases obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0018] An offline billet weighing device includes a lifting support system, a weighing system, a hydraulic system, and an electrical instrument system. The lifting support system includes a lifting support table 1, a limiting structure 2, a hydraulic cylinder 5, and a socket-type guiding sleeve 6. The hydraulic cylinder 5 is connected to the hydraulic system, installed on the bottom plate. A positioning sleeve 4 and a support cross beam 3 are installed on the upper part of the hydraulic cylinder 5. An activity base 7 is welded below the support cross beam 3. The socket-type guiding sleeve 6 is welded on the activity base 7. The lifting support table 1 is installed above the support cross beam 3. The limiting structure 2 is welded on the lifting support table 1. The lower part of the lifting support table 1 is welded to the socket-type guiding sleeve 6; The weighing system includes a sensor 11, a weighing platform 12, a weighing platform limit 13, and a weighing platform base 10. The weighing platform 12 is installed on the weighing platform base 10. There is a spacing between the weighing platform 12 and the lifting support table 1 in the working state. The sensor 11 is set between the weighing platform 12 and the weighing platform base 10. The weighing platform limit 13 is set above the weighing platform 12. The sensor 11 is connected to the electrical instrument system.

[0019] The lifting support system also includes an activity base limit 8 and a fixed guiding support 9. The activity base limit 8 and the fixed guiding support 9 are installed on the bottom plate. The activity base limit 8 is set on both sides of the hydraulic cylinder 5, matching the position of the activity base 7. The fixed guiding support 9 is set outside the activity base limit 8. The upper part of the fixed guiding support 9 is connected to the activity base 7.

[0020] There are two limiting structures 2, set at the central position of the lifting support table 1.

[0021] There are four socket-type guiding sleeves 6, evenly distributed at the four corner positions below the lifting support table 1.

[0022] The sensor 11 is a 0.1-level 3t sensor. There are six sensors 11, with three sensors 11 in a group. The electrical instrument system includes a transmitter and a digital display screen. The six sensors 11 are connected in parallel and then connected to the transmitter. The data line of the transmitter is connected to the digital display screen.

[0023] The hydraulic system includes an oil tank, a valve group, a hydraulic pump, and a hydraulic pipeline. The hydraulic pipeline is connected to the hydraulic cylinder 5.

[0024] The hydraulic pump is a synchronous hydraulic motor.

[0025] An offline billet weighing method includes the following steps: (1) Debug and calibrate the sensor; (2) Start the hydraulic pump, operate the up-start button, and raise the lifting support table; (3) The traveling crane puts the billet to be measured into the central position of the lifting support table; (4) Operate the down button of the hydraulic system to start lowering the lifting support table, place the billet on the weighing platform, and the weighing data will be displayed. (5) Operate the up button of the hydraulic system to start raising the lifting support table, so that the billet is separated from the weighing platform. (6) The overhead crane removes the billet from the lifting support table.

[0026] The step (1) includes the following steps: Start the hydraulic pump, operate the up button, raise the lifting support table, and the overhead crane places the weight billet at the center position of the lifting support table. The transmitter is calibrated to zero, and repeat the calibration several times until the digital display shows the zero state. Operate the down button of the hydraulic system to start lowering the lifting support table. After placing the billet on the weighing platform, start calibrating the weight billet, and repeat the calibration several times until the digital display shows that the weight of the weight billet remains unchanged or the error fluctuates up and down by 0.5 kg.

[0027] There is a certain distance between the weighing platform and the lifting support table, and there should be no contact.

[0028] Six sensors are provided, and three sensors are used as a group to maintain stability.

[0029] In practical applications, the present invention includes a lifting support system, a weighing system, a hydraulic system, and an electrical instrument system. The total length of the device is 8800 mm, the width is 750 mm, and the height is 1400 mm.

[0030] Lifting support system As Figure 2 , the lifting support system is composed of a guiding support 9, a socket-type guiding sleeve 6, a socket-type guiding sleeve movable base 7, a hydraulic cylinder 5, a movable base limit 8, a lifting support table 1, a support table limit 2, a hydraulic cylinder positioning sleeve 4, and a support cross beam 3. First, embed two base plates and level them with a high-precision level as the leveling reference for the subsequent installation components. Through line laying, determine the installation position of the hydraulic cylinder 5. Install the hydraulic cylinder base and the hydraulic cylinder 5 on the base plate. Install the positioning sleeve 4 and the support cross beam 3 on the upper part of the hydraulic cylinder. The distance from the support cross beam 3 to the hydraulic cylinder 5 is 810 mm. Weld and fix the movable base 7 below the support cross beam 3. Then, fabricate four socket-type guiding sleeves 6 respectively and weld them on the movable base 7 and level them. Install the lifting support table 1 and weld it to the socket-type guiding sleeve 6. The length of the lifting support table 1 is 1200 mm, and the height from the ground is 1240 mm. Weld two limiting structures 2 on the lifting support table 1 respectively to ensure that the billet can be placed at the center position and improve the weighing accuracy. Install the movable base limit 8 on both sides of the hydraulic cylinder 5, and install the fixed guiding support 9 on the base plate.

[0031] Weighing system As Figure 3, The weighing system consists of a weighing platform 12, a weighing platform base 10, sensors 11, and a weighing platform stopper 13. The weighing platform 12 is 1000 mm long, 750 mm wide, and 350 mm high. There should be a certain distance between the weighing platform 12 and the hydraulic lifting support table 1 without any contact. First, weld the two weighing platform bases 10 to two embedded base plates respectively, and level them with a high-precision level. After leveling, confirm the positions of the sensors 11. The sensors 11 are 0.1-level 3t high-precision sensors. Install six sensors 11, with three sensors 11 in a group to maintain stability, which can ensure the accuracy error.

[0032] Hydraulic system Install the hydraulic system, including an oil tank, valve group, hydraulic pump (synchronous hydraulic motor), and hydraulic pipelines. After installation, conduct pipeline flushing until the oil quality reaches level seven compliance.

[0033] Electrical instrument system Six sensors 11 are connected in parallel and then connected to a transmitter, and the data cable of the transmitter is connected to a digital display.

[0034] Debugging Start the hydraulic pump, operate the up button, raise the lifting support table 1, and use a crane to place the weight billet at the center position of the lifting support table 1. Calibrate the transmitter to zero, and repeat the calibration several times until the digital display shows a zero state. Then operate the down button of the hydraulic system to start lowering the lifting support table 1. After placing the billet on the weighing platform 12, start calibrating the weight billet, and repeat the calibration several times until the digital display shows that the weight of the billet remains unchanged or fluctuates within an error of 0.5 kg.

[0035] The operation steps of the present invention are as follows: Step 1: Debug and calibrate the sensors 11 (see debugging details).

[0036] Step 2: Start the hydraulic pump, operate the up button, and raise the lifting support table 1.

[0037] Step 3: Use a crane to place the billet to be measured at the center position of the lifting support table 1.

[0038] Step 4: Operate the down button of the hydraulic system to start lowering the lifting support table 1, place the billet on the weighing platform 12, and display the weighing data.

[0039] Step 5: Operate the up button of the hydraulic system to start raising the lifting support table 1 to separate the billet from the weighing platform 12.

[0040] Step 6: Use a crane to move the billet out of the lifting support table 1.

[0041] Through the socket-type guiding sleeve design and the limiting structure of the present invention, the weighing quality of the billet can be made to fluctuate up and down by up to 0.5 kg, providing technical support for the problem of billet fixed weight. 2. The design is simple, the equipment manufacturing cost is low, and the installation and daily maintenance of the equipment for offline billet weighing are made simpler.

Claims

1. An offline billet weighing device, characterized in that: The invention comprises a lifting support system, a weighing system, a hydraulic system and an electrical instrument system. The lifting support system comprises a lifting support platform (1), a limiting structure (2), a hydraulic cylinder (5) and a socket-type guide sleeve (6). The hydraulic cylinder (5) is connected to the hydraulic system. The hydraulic cylinder (5) is mounted on a bottom plate. A positioning sleeve (4) and a supporting crossbeam (3) are mounted on the upper part of the hydraulic cylinder (5). A movable base (7) is welded below the supporting crossbeam (3). The socket-type guide sleeve (6) is welded to the movable base (7). The lifting support platform (1) is mounted above the supporting crossbeam (3). The limiting structure (2) is welded to the lifting support platform (1). The lower part of the lifting support platform (1) is welded to the socket-type guide sleeve (6). The weighing system comprises a sensor (11), a weighing platform (12), a weighing platform limiter (13) and a weighing platform base (10); the weighing platform (12) is mounted on the weighing platform base (10); in a working state, a distance is provided between the weighing platform (12) and the lifting support platform (1); the sensor (11) is arranged between the weighing platform (12) and the weighing platform base (10); the weighing platform limiter (13) is arranged above the weighing platform (12); and the sensor (11) is connected to an electrical instrument system.

2. The offline billet weighing device according to claim 1, characterized in that: The lifting support system further comprises a movable base limiter (8) and a fixed guide support (9), wherein the movable base limiter (8) and the fixed guide support (9) are mounted on the bottom plate, the movable base limiter (8) is arranged on both sides of the hydraulic cylinder (5) to match the position of the movable base (7), the fixed guide support (9) is arranged on the outside of the movable base limiter (8), and the upper part of the fixed guide support (9) is connected to the movable base (7).

3. The offline billet weighing device according to claim 1, characterized in that: There are two limit structures (2), which are arranged at the center of the lifting support platform (1).

4. An offline billet weighing device according to claim 1, characterized in that: The socket-type guide sleeves (6) are four and evenly distributed at the four lower corners of the lifting support platform (1).

5. The offline billet weighing device according to claim 1, characterized in that: The sensor (11) is a 0.1-level 3t sensor. There are six sensors (11), three sensors (11) form a group, and the electrical instrument system comprises a transmitter and a digital display screen. The six sensors (11) are connected in parallel to the transmitter, and the data line of the transmitter is connected to the digital display screen.

6. The offline billet weighing device according to claim 1, wherein: The hydraulic system comprises an oil tank, a valve group, a hydraulic pump and a hydraulic pipeline, wherein the hydraulic pipeline is connected to a hydraulic cylinder (5); the hydraulic pump is a synchronous hydraulic motor.

7. An offline billet weighing method, characterized in that The following steps are involved: (1) Debug and calibrate the sensor; (2) Start the hydraulic pump and press the start button to raise the lifting support platform; (3) The crane places the steel billet to be tested in the center of the lifting support platform; (4) Press the hydraulic system down button to start lowering the lifting support platform, place the billet on the weighing platform, and display the weighing data; (5) Operate the start button of the hydraulic system to start raising the lifting support platform to separate the billet from the weighing platform; (6) The crane moves the steel billet out of the lifting support platform.

8. A method for offline weighing of steel billets according to claim 7, characterized in that: The step (1) includes the following steps: Start the hydraulic pump, operate the up-start button to raise the lifting support table. Use the overhead crane to place the weight billet at the center position of the lifting support table. Zero the transmitter and repeat the calibration several times until the digital display shows a zero state. Operate the down-start button of the hydraulic system to lower the lifting support table. After placing the billet on the weighing platform, start to calibrate the weight billet and repeat the calibration several times until the digital display shows that the weight of the weight billet remains unchanged or fluctuates within an error of 0.5 kg.

9. The offline billet weighing method according to claim 7, characterized in that: There is a certain distance between the weighing platform and the lifting support table, and they should not be in contact.

10. A method for offline weighing of steel billets according to claim 7, characterized in that: Six sensors are provided, and three sensors are used as a group to maintain stability.

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