CN212721220U - Device for measuring thickness of molten iron slag through buoyancy change - Google Patents
Device for measuring thickness of molten iron slag through buoyancy change Download PDFInfo
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- CN212721220U CN212721220U CN202021226750.8U CN202021226750U CN212721220U CN 212721220 U CN212721220 U CN 212721220U CN 202021226750 U CN202021226750 U CN 202021226750U CN 212721220 U CN212721220 U CN 212721220U
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Abstract
The utility model discloses a device for measuring the thickness of molten iron slag through buoyancy change, which comprises a frame, a rotating shaft rotationally matched with the frame, a rotating arm arranged on the upper part of the rotating shaft, and a monitoring unit arranged at the front end of the rotating arm and used for measuring the pulling force and the displacement; the device also comprises a measuring head which is matched with the monitoring unit through a steel wire rope. The monitoring unit comprises a box body, a steel wire rope fixed with the measuring head penetrates through the box body, the upper end of the steel wire rope is matched with the rope winding motor, and a tension meter is arranged on the steel wire rope; a displacement sensor is also arranged in the box body, and the free end of the displacement sensor is matched with the steel wire rope. The utility model discloses measurement accuracy is high, and measuring speed is fast, and the reliability is high, can repeat repetitious usage, effective reduction in production cost. The device effectively solves the problem of measuring the thickness of the molten iron slag in the molten iron tank, realizes the automatic measurement of the thickness of the molten iron slag, has the advantages of full automation, strong adaptability, simple and convenient use, reliable work, low cost and the like, and can improve the detection efficiency and precision.
Description
Technical Field
The utility model belongs to the technical field of smelt auxiliary assembly, concretely relates to through thick device of buoyancy change measurement molten iron sediment.
Background
SiO in molten iron slag2And the contents of S and the like are high, if the slag content is high, the converter smelting is not facilitated, the problems of slag overflow, splashing and the like are easily caused in the converter smelting process, the consumption of metal materials is increased, the removal of phosphorus and sulfur is influenced, a furnace lining is damaged, and the like. Is not beneficial to the control of indexes and safe production, and needs to control the slag content of the molten iron from the viewpoint of safe and economic production. As the slag carrying amount of the molten iron is increased, a plurality of economic and technical indexes of steel making are affected, and the steel making cost is also increased. Therefore, the steel plant puts forward the requirement of controlling the slag carrying amount of the molten iron to the iron plant and quantitatively examines the slag carrying amount of the molten iron. For part of steel grades, the requirement on the slag quantity of molten iron is not strict, but the slag carrying quantity cannot be too large, so that how to quickly judge whether the slag carrying quantity of the molten iron in each tank meets the requirement is necessary for stable production, time saving and production cost reduction.
At present, Chinese patent with publication number CN106524975A mainly discloses a method for measuring the thickness of molten iron in a molten iron tank by using a copper bar, which mainly calculates the thickness of the molten iron by physically measuring the length of the copper bar bonded with the molten iron slag; chinese patent publication No. CN106767287A proposes a method for measuring the thickness of molten iron in a hot metal ladle with slag by using a molybdenum rod, which mainly calculates the slag thickness by physically measuring the length of the molybdenum rod bonded with the molten iron slag; chinese patent publication No. CN201438099U proposes a ruler for measuring the thickness of steel slag, which mainly uses two materials with different melting points to melt the easy-to-melt material by the heat of molten iron to measure the thickness of the slag. The three patents calculate the slag thickness by using a physical method, and the slag thickness is actually measured by personnel, so that the labor intensity is high, the efficiency is low, the error is large, particularly CN201438099U, and new measuring equipment is required to be used for each measurement. Chinese patent publication No. CN208721011U proposes a molten iron slag thickness measuring device, which mainly uses two graphene electrodes, and since slag is not conductive, but molten iron is conductive, the molten iron slag thickness is calculated by the height mode of electrode descending. The method can reduce the labor intensity of workers, but the control of the electrode descending height needs to be accurately controlled, particularly when the slag surface is searched for the first time, the result is influenced by inaccurate query surface due to the bad influence of the environment, and meanwhile, when the molten iron surface is continuously searched for, the molten iron surface needs to be accurately moved, and the operation time is relatively long. Therefore, how to measure the thickness of the molten iron slag quickly, simply and effectively is necessary for practical production.
SUMMERY OF THE UTILITY MODEL
In view of the deficiencies of the prior art, the object of the present invention is to: provides a device for measuring the thickness of molten iron slag through buoyancy change, which solves the problems in the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a thick device of measuring molten iron sediment through buoyancy change which characterized in that: the device comprises a rack and a rotating shaft which is in rotating fit with the rack, wherein a rotating arm is arranged at the upper part of the rotating shaft, and a monitoring unit for measuring tension and displacement is arranged at the front end of the rotating arm; the device also comprises a measuring head which is matched with the monitoring unit through a steel wire rope.
Further: the measuring head is a cylindrical molybdenum rod.
Further: the monitoring unit comprises a box body, the box body is fixed at the front end of the rotating arm, a steel wire rope fixed with the measuring head penetrates through the box body, the upper end of the steel wire rope is matched with a rope winding motor, and a tension meter is arranged on the steel wire rope; and a displacement sensor is also arranged in the box body, the displacement sensor is fixed on the box body, and the free end of the displacement sensor is matched with the steel wire rope.
Further: the tension meter and the displacement sensor of the monitoring unit are connected with the controller through data lines and used for transmitting monitored data to the controller.
The utility model has the advantages that: the utility model discloses (1) measurement accuracy is high, and diameter adjustment precision size through the adjustment measuring head, the overall process need not artifical the measurement, and the precision is high, reduces personnel intensity of labour. (2) The measuring speed is high, the measuring can be finished only by completing the movement of the measuring head from the air to the molten iron slag layer and then to the molten iron area, the time is saved, and the production efficiency is improved. (3) Because the molybdenum has high melting point, the test equipment can be repeatedly used, and the production cost is effectively reduced. (4) Because the thickness of the molten iron slag is calculated by using the proportional relation between the tension and the displacement, the density of the molten iron slag and the change of the molten iron density are not influenced, the molten iron slag is not influenced to a great extent in a molten iron region, and the reliability is high. The utility model discloses the problem of survey hot metal bottle molten iron sediment thickness has effectively been solved to the structure, has realized the thick automatic measure of molten iron sediment, has full-automatic, adaptability is strong, uses portably, and reliable operation, advantage such as with low costs can improve detection efficiency and precision.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural diagram of a monitoring unit of the present invention;
fig. 3 is a schematic view showing a test result in an embodiment of the present invention.
The sequence numbers in the figures illustrate: 1 is a frame, 2 is a rotating shaft, 3 is a rotating motor, 4 is a rotating arm, 5 is a monitoring unit, 6 is a measuring head, 7 is a steel wire rope, 8 is a controller, and 10 is a hot metal ladle; 51 is a box body, 52 is a rope winding motor, 53 is a tension meter, 54 is a displacement sensor, and 55 is a data line.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1-3, the utility model relates to a device for measuring the thickness of molten iron slag in a molten iron tank 10 by buoyancy change, which comprises a frame 1, wherein the frame is used for fixing the whole device on the ground or corresponding equipment; the rotating shaft 2 is rotationally matched with the rack and is controlled to rotate by a rotating motor 3 and a transmission mechanism which are arranged in the rack; a rotating arm 4 is arranged at the upper part of the rotating shaft and can rotate along with the rotating shaft; the front end of the rotating arm is provided with a monitoring unit 5 for measuring tension and displacement, and the monitoring unit is used for measuring the stress condition and the displacement change condition of the steel wire rope when a measuring head at the lower end of the steel wire rope displaces; the device also comprises a measuring head 6, wherein the measuring head is a cylindrical molybdenum rod and is matched with the monitoring unit through a steel wire rope 7.
Preferably: the monitoring unit 5 comprises a box body 51 fixed at the front end of the rotating arm, the upper end of a steel wire rope fixed with the measuring head penetrates through the box body and is matched with a rope winding motor 52 to ascend and descend under the driving of the rope winding motor; a tension meter 53 for measuring the stress of the steel wire rope is arranged on the steel wire rope; a displacement sensor 54 is also arranged inside the box body, the displacement sensor is fixed on the box body, and the free end of the displacement sensor is matched with the steel wire rope and used for measuring the displacement of the steel wire rope.
Preferably: the tension meter and the displacement sensor of the monitoring unit are electrically connected with the controller through a data line 55 or in a wireless communication mode and used for transmitting monitored data to the controller, the controller is an existing product or a computer with a corresponding open program and matched with components of the monitoring unit, and the transmitted data can be recorded and analyzed.
Preferably: the tensiometer is an HF digital display type push-pull tensiometer, and the displacement sensor is a Miron brand KTC1 type linear displacement sensor.
The utility model discloses the working process of structure as follows:
1) selecting a proper cylindrical molybdenum measuring head, fixedly connecting the upper end of the measuring head with a steel wire rope, and controlling the steel wire rope to move up and down through a rope winder; the rope winder comprises a rope winding motor and a rope winding roller connected with the rope winding motor, and when the rope winder is not positioned right above the measuring head, the rope winder also comprises a fixed pulley for changing the direction of the steel wire rope;
2) moving the measuring head to the upper part of the hot metal ladle by using a rotating arm; controlling a Zheng rope motor to release a rope, slowly lowering one end of a measuring head from the upper edge of the molten iron slag, enabling the measuring head to descend and sequentially penetrate through the molten iron slag layer, and continuing to descend until the upper edge of the measuring head is 50-100mm away from the surface of the molten iron slag; then the measuring head is pulled up until the measuring head leaves the hot metal ladle and is reset;
3) recording the corresponding situation of the pulling force and the displacement change of the steel wire rope in the descending process of the measuring head, when the pulling force of the steel wire rope is reduced (the variation is large and the measuring head starts to be reduced continuously, and the tiny interference needs to be removed), namely the position of the measuring head, which is contacted with the iron slag, is subjected to the buoyancy of the iron slag, so that the pulling force is reduced, at the moment, recording the displacement of the steel wire rope as S1, when the pulling force of the steel wire rope is increased again, namely the position of the lower end of the measuring head, which is just contacted with the molten iron, is not subjected to the buoyancy of the iron slag, and the buoyancy of the molten iron is small, so that the pulling force is suddenly increased to be close; the thickness S of the molten iron slag is as follows: s = S2-S1.
Wherein, the measuring head is a cylinder with the diameter phi of 220mm and the length of 300 mm.
Wherein the measuring head is moved at a speed of 0.1-0.5 meters per minute.
The controller is a computer with a corresponding program, the program is an open program and is provided by a manufacturer of the tension meter and the displacement sensor, and simple recording, calculating and controlling functions can be realized.
In the structure of the utility model, the measuring head is made of molybdenum; the melting point of molybdenum is 2160 ℃, so that the test piece has a high melting point and is not easy to corrode and melt in molten iron. Meanwhile, the thickness of the general molten iron slag is not more than 200mm, so that the measuring head with the length of 300mm can be used for enabling the lower end of the measuring head to enter molten iron, and the upper end of the measuring head can be higher than the slag surface, so that the measuring head is convenient to observe.
When the tension and displacement testing device starts to work, the computer starts to record the tension and the downward movement distance of the measuring head. Wherein the tension and the displacement are respectively marked as FiAnd LiIn which F isi(i =1, 2.. said.) represents the amount of tension measured corresponding to the distance moved i downward; using KiShowing the pulling force F when lowering from the i position to the i +1 positioni+1 - FiAnd Li+1 - LiThe ratio of (a) to (b), namely:
Ki=(Fi+1 - Fi) / ( Li+1 - Li) ；
the value is the slope of the broken line, the slope of the relation between the tension and the displacement can be monitored by a computer, and when the slope is obviously changed twice, namely the moment when the measuring head enters the molten iron slag and the molten iron, the slope corresponds to S1 and S2 respectively.
Due to the density of molten iron (about 7100 Kg/m)3) The density of the molten iron slag is about 2500Kg/m3) There is a great difference, when the measuring head enters the slag layer from the air, the stress relationship is as follows:
F=G-Ρmolten iron slaggVRow board= G-ΡMolten iron slaggSH；
Wherein F is a tensile force; g is the gravity of the measuring head; s is the measuring head bottom area, H is the depth of the measuring head entering, and p is the density.
When the measuring head enters the molten iron area from the molten iron slag, the stress is as follows:
F=G-Ρmolten irongVRow board= G-ΡMolten irongSH；
Wherein F is a tensile force; g is the gravity of the measuring head; s is the bottom area of the measuring head, and H is the depth of the measuring head entering the molten iron area.
Since the weight G of the selected head is already determined, the value of F is only linear with H. After the measuring head passes through the molten iron slag layer, the measuring head is cylindrical, so that the measuring head is not influenced by the buoyancy of the molten iron slag, the buoyancy of the molten iron to the measuring head is very small and almost zero, and the pull force detected at the upper end is almost equal to the gravity of the measuring head. Therefore, the thickness value of the molten iron slag can be calculated through the variation relation of the molten iron slag and the displacement condition. And the thickness of the molten iron slag is directly displayed by a computer.
The detection principle of the scheme is as follows: when the measuring head passes through the area with larger density difference, the buoyancy force borne by different areas changes along with different invasion depths, and the change trend is in direct proportion to the density of the liquid. And at the moment that the measuring head enters the molten iron area from the molten iron slag area, the buoyancy of the molten iron slag disappears, and the pulling force approaches the gravity of the measuring head. Therefore, the thickness of the molten iron slag layer can be calculated through the position difference between the tension change and the corresponding change.
For the convenience of accurate calculation to the order of 1mm, the measuring head adopted is phi 220mm, the gravity is fixed through the tension = gravity-buoyancy, and the buoyancy = molten iron slag density and gravity acceleration and the volume of the measuring head intruding, so that if the measuring head needs to be accurate to 1mm, the diameter of the measuring head is required to be larger than 220mm to ensure that the buoyancy change is equal to 1N, so that the requirement of the measurement accuracy of the tension measurement is met. After the diameter of the measuring head is fixed, when the measuring head enters molten iron, the buoyancy change of the measuring head is about 2.7N when the measuring head is immersed into the molten iron for 1mm of depth, and the tension measurement precision is met. Because the thickness of the molten iron slag is different in different enterprises and is generally not more than 200mm, the measuring head with the length of 300mm can meet the operation requirement.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (4)
1. The utility model provides a thick device of measuring molten iron sediment through buoyancy change which characterized in that: the device comprises a rack and a rotating shaft which is in rotating fit with the rack, wherein a rotating arm is arranged at the upper part of the rotating shaft, and a monitoring unit for measuring tension and displacement is arranged at the front end of the rotating arm; the device also comprises a measuring head which is matched with the monitoring unit through a steel wire rope.
2. The apparatus for measuring molten iron slag thickness according to claim 1, wherein: the measuring head is a cylindrical molybdenum rod.
3. The apparatus for measuring molten iron slag thickness according to claim 1, wherein: the monitoring unit comprises a box body, a tension meter and a displacement sensor, wherein the tension meter and the displacement sensor are arranged in the box body; and a displacement sensor is also arranged in the box body, the displacement sensor is fixed on the box body, and the free end of the displacement sensor is matched with the steel wire rope.
4. The apparatus for measuring molten iron slag thickness according to claim 1, wherein: the tension meter and the displacement sensor of the monitoring unit are connected with the controller through data lines and used for transmitting monitored data to the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021226750.8U CN212721220U (en) | 2020-06-29 | 2020-06-29 | Device for measuring thickness of molten iron slag through buoyancy change |
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| CN202021226750.8U CN212721220U (en) | 2020-06-29 | 2020-06-29 | Device for measuring thickness of molten iron slag through buoyancy change |
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| CN212721220U true CN212721220U (en) | 2021-03-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795633A (en) * | 2020-06-29 | 2020-10-20 | 五矿营口中板有限责任公司 | Device and method for measuring molten iron slag thickness through buoyancy change |
| CN113828757A (en) * | 2021-09-13 | 2021-12-24 | 海宁哈工我耀机器人有限公司 | Method for accurately controlling quality of high-temperature molten iron in electrolytic aluminum anode casting |
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2020
- 2020-06-29 CN CN202021226750.8U patent/CN212721220U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795633A (en) * | 2020-06-29 | 2020-10-20 | 五矿营口中板有限责任公司 | Device and method for measuring molten iron slag thickness through buoyancy change |
| CN113828757A (en) * | 2021-09-13 | 2021-12-24 | 海宁哈工我耀机器人有限公司 | Method for accurately controlling quality of high-temperature molten iron in electrolytic aluminum anode casting |
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| CP01 | Change in the name or title of a patent holder |
Address after: 115005 metallurgical street, old border district, Yingkou City, Liaoning Province Patentee after: Japan Steel Yingkou Medium Plate Co.,Ltd. Address before: 115005 metallurgical street, old border district, Yingkou City, Liaoning Province Patentee before: MINMETALS YINGKOU MEDIUM PLATE Co.,Ltd. |
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