An improved device for improving the metering stability of furnace inlet scale

Abstract

The utility model discloses an improved device for improving the metering stability of furnace inlet scale, comprising: a lifting device, a weighing platform, a counterweight, and several sensors, wherein the sensors are used to measure the force of the weighing platform, the lifting device comprises a lifting rod that can be raised and lowered, and a driving device for driving the lifting rod to be raised and lowered, the driving device is installed on the weighing platform, the lifting rod extends from one side of the weighing platform, and the counterweight extends from the other side of the weighing platform. By modifying the counterweight and pipeline, the adverse effects on the sensor measurement are reduced, so that the weighing accuracy is higher and the stability is better.

Description

Technical Field

[0001] The utility model relates to the field of steel production, in particular to an improved device for improving the metering stability of a furnace inlet scale. Background Art

[0002] The furnace scale is an important part of steel rolling sizing and weighting. At present, the layout of the furnace scale is rough and there is a problem of weighing instability. The counterweights are randomly stacked on the scale to prevent the scale from tipping over. However, when weighing, the billet is located on one side of the scale, and the scale tilts seriously. The sensors at different positions show large errors. The final calculated weight displayed on the scale fluctuates greatly compared with the steelmaking theory. Sometimes it becomes lighter and sometimes heavier. The maximum error of the calibration data is -13kg, which exceeds the standard range of 3‰. This makes it difficult to adjust steelmaking, and frequent adjustments to the furnace scale may cause large cutting losses. Utility Model Content

[0003] The utility model aims to provide an improved device for improving the metering stability of a furnace inlet scale, and reduces the adverse effect on sensor measurement by modifying the counterweight and pipeline, so as to achieve higher weighing accuracy and better stability.

[0004] An improved device for improving the metering stability of a furnace inlet scale comprises: a lifting device, a weighing platform, a counterweight, and several sensors, wherein the sensors are used to measure the force applied to the weighing platform, the lifting device comprises a liftable lifting rod, and a driving device for driving the liftable lifting rod, the driving device is installed on the weighing platform, the lifting rod extends from one side of the weighing platform, and the counterweight extends from the other side of the weighing platform.

[0005] In one embodiment, the sensor is disposed at the bottom of the weighing platform.

[0006] In one of the embodiments, the improved device for improving the metering stability of the furnace inlet scale also includes an air intake main pipe, which is connected to the lifting device and installed on the weighing platform or the counterweight block; or / and, also includes an exhaust main pipe, which is connected to the lifting device and installed on the weighing platform or the counterweight block.

[0007] In one of the embodiments, the improved device for improving the metering stability of the furnace inlet scale further includes an air intake hose, through which the air intake main pipe is connected to the lifting device; or / and, further includes an exhaust hose, through which the exhaust main pipe is connected to the lifting device.

[0008] In one of the embodiments, the improved device for improving the metering stability of the furnace inlet scale also includes a reversing valve, which is installed on the weighing platform or the counterweight block, and the reversing valve is connected to the air intake main pipe; or / and, the reversing valve is connected to the exhaust main pipe.

[0009] In one of the embodiments, the improved device for improving the metering stability of the furnace inlet scale also includes a ball valve, an air filter, an air pressure reducing valve, and an oil mist collector connected in sequence, the oil mist collector is connected to the reversing valve, and the ball valve, the air filter, the air pressure reducing valve, and the oil mist collector are arranged on the weighing platform or the counterweight block.

[0010] In one of the embodiments, the improved device for improving the metering stability of the furnace inlet scale further includes a valve rack, wherein the valve rack is installed on the weighing platform or the counterweight block, and the reversing valve is installed on the valve rack.

[0011] In one of the embodiments, the improved device for improving the metering stability of the furnace inlet scale includes four of the above-mentioned sensors, and the four sensors are distributed in a quadrilateral.

[0012] Compared with the prior art, the advantages of the improved device for improving the metering stability of the furnace inlet scale of the utility model are:

[0013] 1. The counterweight block and lifting rod are located on both sides of the weighing platform, so that the weighing platform is stably stressed, the side tilt is not serious, the difference between multiple sensors is small, and the weighing stability is high.

[0014] 2. All the related devices of the intake and exhaust main pipes are transferred to the weighing platform and the counterweight block. The main pipes are connected to the driving device with a hose. The influence of the pressure difference caused by the movement of the cylinder and the deformation of the air pipe on the weighing is reduced.

[0015] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the top view of the structure of the improved device for improving the metering stability of the furnace inlet scale according to the embodiment of the utility model;

[0018] Figure 2It is a left-side structural schematic diagram of an improved device for improving the metering stability of a furnace inlet scale according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the main structure of the improved device for improving the metering stability of the furnace feed scale according to the embodiment of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the pneumatic system of an improved device for improving the metering stability of a furnace inlet scale according to an embodiment of the utility model.

[0021] Among them, 10, lifting device, 11, lifting rod, 111, the first end of the lifting rod, 112, the second end of the lifting rod, 12, driving device, 20, weighing platform, 21, air intake pipe, 22, exhaust pipe, 23, air intake hose, 24, exhaust hose, 25, reversing valve, 251, valve rack, 26, ball valve, 27, air filter, 28, air pressure reducing valve, 29, oil mist collector, 30, counterweight, 40, sensor. DETAILED DESCRIPTION

[0022] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1-4As shown, the improved device for improving the metering stability of the furnace inlet scale in this embodiment includes: a lifting device 10, a weighing platform 20, a counterweight 30, and a plurality of sensors 40. The sensor 40 is used to measure the force condition of the weighing platform 20. The lifting device 10 includes a liftable lifting rod 11 and a driving device 12 for driving the lifting rod 11 to lift and lower. The driving device 12 is installed on the weighing platform 20. The lifting rod 11 extends from one side of the weighing platform 20, and the counterweight 30 extends from the other side of the weighing platform 20. The lifting rod 11 is used to lift the steel billet, which is conveyed to multiple rollers. The lifting rod 11 is located in the gap between two adjacent rollers. When the driving device 12 drives the lifting rod 11 to rise, the second end 112 of the lifting rod 11 rises from the gap between the rollers to lift the steel billet for weighing. The counterweight block 30 is used to maintain the balance of the weighing platform 20 when lifting the steel billet. The steel billet and the counterweight block 30 are respectively located on both sides of the weighing platform 20, so that the weighing platform 20 is subjected to stable force and the weighing platform 20 has a small inclination, which reduces the adverse effect on the measurement of the sensor 40, and makes the weighing accuracy higher and the stability better.

[0026] This embodiment includes four sensors 40, and the four sensors 40 are distributed in a quadrilateral. Figure 1 As shown, four sensors 40 are distributed in a quadrilateral at the four corners of the weighing platform 20, and can detect gravity values ​​at four points, so as to calculate the weight of the steel billet. However, this embodiment is not limited thereto, and other arrangements of sensors 40 can also be designed.

[0027] The sensor 40 is arranged at the bottom of the weighing platform 20. It is convenient to arrange other equipment above the weighing platform 20 to save space. However, it is not limited to this embodiment, and the sensor 40 can also be arranged on the top of the weighing platform 20, and the weighing platform 20 can be suspended, or other numbers of sensors 40 can be designed.

[0028] The improved device for improving the metering stability of the furnace inlet scale also includes an air intake pipe 21, which is connected to the lifting device 10 and installed on the weighing platform 20 or the counterweight 30; and an exhaust pipe 22, which is connected to the lifting device 10 and installed on the weighing platform 20 or the counterweight 30. The air intake pipe 21 and the exhaust pipe 22 are both connected to the weighing platform 20, and the impulse when operating the driving device 12 is offset on the weighing platform 20, thereby improving the weighing accuracy and stability.

[0029] The improved device for improving the metering stability of the furnace weighing scale further includes an air intake hose 23, through which the air intake main pipe 21 is connected to the lifting device 10; and further includes an exhaust hose 24, through which the exhaust main pipe 22 is connected to the lifting device 10. In this embodiment, Figure 2As shown, the driving device 12 is a cylinder, the middle part of the lifting rod 11 is hinged with the weighing platform 20, the first end 111 of the lifting rod 11 extends from one side of the weighing platform 20, and the second end 112 of the lifting rod 11 is connected to the telescopic end of the cylinder. The lifting rod 11 forms a seesaw-like structure on the weighing platform 20. When the telescopic end of the cylinder is shortened or extended, the first end 111 of the lifting rod 11 can be driven to rise or fall. The four lifting devices 10 in this embodiment are respectively connected to the intake pipe 21 and the exhaust pipe 22 through their own intake hoses 23 and exhaust hoses 24. Before the utility model, there are many interference points between the pipeline gas and the pipeline symmetry platform when the scale rises and lifts to inflate and lowers and puts down to exhaust. The utility model adopts a soft connection method of the intake hose 23 and the exhaust hose 24. The air pressure difference and the deformation of the air pipe caused by the cylinder work are absorbed by the hose, and the vibration generated can be alleviated, and the influence on the accuracy of weighing is also reduced, thereby improving the overall weighing accuracy and stability.

[0030] The improved device for improving the metering stability of the furnace inlet scale also includes a reversing valve 25, which is installed on the weighing platform 20 or the counterweight 30, and is connected to the air intake main pipe 21, and the reversing valve 25 is connected to the exhaust main pipe 22. In addition, it also includes a valve frame 251, which is installed on the weighing platform 20 or the counterweight 30, and the reversing valve 25 is installed on the valve frame 251. The reversing valve 25 is rigidly connected to the weighing platform 20 or the counterweight 30 through the valve frame 251, and the impulse is offset inside the weighing platform 20, thereby improving the stability of weighing accuracy.

[0031] The improved device for improving the metering stability of the furnace inlet scale also includes a ball valve 26, an air filter 27, an air pressure reducing valve 28, and an oil mist collector 29 connected in sequence. The oil mist collector 29 is connected to the reversing valve 25. The ball valve 26, the air filter 27, the air pressure reducing valve 28, and the oil mist collector 29 are arranged on the weighing platform 20 or the counterweight block 30 to reduce the influence of air pressure changes on the weighing stability.

[0032] The utility model mainly solves the problem of stability of the metering accuracy of the furnace scale. The inventor has found that the unreasonable design of the counterweight device and the external gas source pipeline have a great influence on the weighing of the scale through field use process investigation and calibration big data statistical analysis. The difference between lifting the upper position and putting it down in the weight blank experiment is very large, with a maximum of 13kg. Most of the big data statistics are stable at 7-8kg, and the qualified rate of the blank weight is only about 40%. Through the transformation of the utility model, the feedback code value of the metering sensor is tested by the inspection weight blank, and the eccentric load of the weight sensor should not exceed twice, which is within the normal range, greatly improving the stability of the weighing accuracy.

[0033] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. An improved device for improving the metering stability of the furnace inlet scale, characterized in that: include: A lifting device, a weighing platform, a counterweight, and several sensors, wherein the sensors are used to measure the force conditions of the weighing platform, the lifting device includes a liftable lifting rod and a driving device for driving the lifting rod to move up and down, the driving device is installed on the weighing platform, the lifting rod extends from one side of the weighing platform, and the counterweight extends from the other side of the weighing platform.

2. The improved device for improving the metering stability of the furnace inlet scale according to claim 1 is characterized in that: The sensor is arranged at the bottom of the weighing platform.

3. The improved device for improving the metering stability of the furnace inlet scale according to claim 1 is characterized in that: It also includes an air intake pipe, which is connected to the lifting device and installed on the weighing platform or the counterweight; or / and, it also includes an exhaust pipe, which is connected to the lifting device and installed on the weighing platform or the counterweight.

4. The improved device for improving the metering stability of the furnace inlet scale according to claim 3 is characterized in that: It also includes an air intake hose, through which the air intake main pipe is connected to the lifting device; or / and, it also includes an exhaust hose, through which the exhaust main pipe is connected to the lifting device.

5. The improved device for improving the metering stability of the furnace inlet scale according to claim 3 is characterized in that: It also includes a reversing valve, which is installed on the weighing platform or the counterweight block, and is connected to the air intake pipe; or / and, the reversing valve is connected to the exhaust pipe.

6. The improved device for improving the metering stability of the furnace inlet scale according to claim 5, characterized in that: It also includes a ball valve, an air filter, an air pressure reducing valve, and an oil mist device connected in sequence. The oil mist device is connected to the reversing valve. The ball valve, the air filter, the air pressure reducing valve, and the oil mist device are arranged on the weighing platform or the counterweight block.

7. The improved device for improving the metering stability of the furnace inlet scale according to claim 5, characterized in that: It also includes a valve frame, which is installed on the weighing platform or the counterweight block, and the reversing valve is installed on the valve frame.

8. An improved device for improving the metering stability of a furnace inlet scale according to any one of claims 1 to 7, characterized in that: The invention comprises four sensors, and the four sensors are distributed in a quadrilateral.

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