Molten steel sampling device

Abstract

The utility model discloses a molten steel sampling device. The molten steel sampling device comprises a holding rod; the first end face of the molten steel dipping plate is connected with the holding rod; and the limiting piece is arranged on the second end face of the molten steel dipping plate, and the second end face is opposite to the first end face. According to the molten steel sampling device provided by the utility model, the technical problems that the sampling molten steel has the defects of shrinkage cavities, looseness and the like due to improper shape and volume of the sampling cup, the sampling range representativeness is insufficient and the sampling depth cannot be accurately determined are solved; therefore, the molten steel taken out by the molten steel sampling device can correctly represent the quantity, the size, the morphology, the distribution and other conditions of the inclusions in the molten steel, so that the experiment and industrial production can be more accurately guided according to the inclusion behavior in the steelmaking production or test.

Description

Technical Field

[0001] The utility model relates to the technical field of steel smelting equipment, in particular to a molten steel sampling device. Background Art

[0002] During the steelmaking process, it is necessary to extract the molten steel in the melting furnace or ladle as a sample to dissect and analyze the inclusion behavior in the molten steel, so as to adjust the steelmaking process and improve product quality. The molten steel sampler is a special equipment for extracting molten steel. The existing molten steel sampler uses a sampling cup to immerse the molten steel, then take out the sampling cup filled with molten steel, quickly put it into water to cool it or cool it naturally, and take it out after the molten steel condenses to obtain the sample.

[0003] The existing molten steel samplers have the following problems: First, the sampling cup is large in shape and volume, and the molten steel sample is prone to shrinkage holes, looseness and other defects, resulting in inaccurate test results; second, the sampling cup is small in shape and volume, the sampling range is small, and the sample molten steel is violently tumbled and mixed when entering the sampler, which will lead to unrepresentative test results; third, the depth of the sampling cup inserted into the molten steel cannot be accurately determined, and molten steel samples of different depths or fixed depths cannot be taken according to actual needs. The existence of the above problems makes it impossible for the molten steel taken out by the existing molten steel sampler to correctly characterize the number, size, morphology and distribution of inclusions in the molten steel, so that it is impossible to more accurately guide experiments and industrial production based on the inclusion behavior.

[0004] Based on this, the existing technology still needs to be improved. Utility Model Content

[0005] In order to solve the above technical problems, an embodiment of the utility model proposes a molten steel sampling device, which can solve at least one of the technical problems of the existing molten steel sampler due to the inappropriate shape and volume of the sampling cup, the sampling range is not representative enough, and the sampling depth cannot be accurately determined.

[0006] The utility model discloses a molten steel sampling device, which comprises:

[0007] Holding rod;

[0008] A molten steel absorbing plate, wherein a first end surface of the molten steel absorbing plate is connected to the holding rod;

[0009] A limiting member is arranged on the second end surface of the molten steel extraction plate, and the second end surface is arranged opposite to the first end surface.

[0010] According to an embodiment of the utility model, the holding rod includes a vertical rod and an inclined rod, one end of the vertical rod is vertically connected to the first end surface of the molten steel absorbing plate, and the other end of the vertical rod is connected to one end of the inclined rod.

[0011] According to an embodiment of the present utility model, a handle ring is provided at the other end of the inclined rod.

[0012] According to an embodiment of the present utility model, after the vertical rod is connected to the inclined rod, a predetermined angle is formed between the inclined rod and the horizontal plane.

[0013] According to an embodiment of the present utility model, the predetermined angle is 30 to 60°.

[0014] According to an embodiment of the present utility model, the length of the vertical rod is 0.8 to 1.5 m, and the length of the inclined rod is 1.8 to 2.2 m.

[0015] According to an embodiment of the present utility model, the molten steel sampling plate is a cube plate or a cuboid plate.

[0016] According to an embodiment of the present utility model, the thickness of the molten steel sampling plate is 3 to 10 mm, the width is 200 to 500 mm, and the height is 300 to 600 mm.

[0017] According to an embodiment of the present utility model, the limiting member is 1 to 3 metal columns with the same length.

[0018] According to an embodiment of the present utility model, the length of the metal column is 100 to 1000 mm.

[0019] By adopting the above technical solution, the present utility model has at least the following beneficial effects:

[0020] The molten steel sampling device provided by the present utility model, by using a molten steel sampling plate, inserts the molten steel sampling plate into the molten steel and holds it for a certain time before taking it out. Then, the molten steel containing inclusions is rapidly cooled on the surface of the molten steel sampling plate, so that the inclusions are fixed inside or on the surface of the solidified steel shell of the molten steel sampling plate. After grinding and polishing the cooled molten steel sampling plate for detection, the behavior of the inclusions in the molten steel can be obtained. At the same time, a limiting member is used to limit the depth of the molten steel sampling device inserted into the molten steel, and molten steel samples with different depths or fixed depths can be taken according to actual needs. The present utility model solves the technical problems of shrinkage cavities, porosity and other defects in the sampled molten steel caused by inappropriate shapes and volumes of the sampling cups, insufficient representativeness of the sampling range, and inability to accurately determine the sampling depth, thereby ensuring that the molten steel taken out by the molten steel sampling device can correctly characterize the quantity, size, morphology and distribution of inclusions in the molten steel, and thus ensuring more accurate guidance of experiments and industrial production according to the inclusion behavior in steelmaking production or experiments. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 The structural schematic diagram of the molten steel sampling device disclosed in an embodiment of the present invention. Specific embodiments

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the following will further elaborate on the embodiments of the present invention in detail with reference to specific embodiments and the accompanying drawings.

[0024] It should be noted that all the expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities or non-identical parameters with the same name. It can be seen that "first" and "second" are only for the convenience of expression and should not be construed as a limitation on the embodiments of the present invention. This will not be elaborated one by one in the subsequent embodiments.

[0025] In the following description, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0026] As Figure 1 shown, an embodiment of the present invention discloses a molten steel sampling device, which includes:

[0027] A holding rod 10;

[0028] A molten steel dipping plate 20, the first end face of the molten steel dipping plate 20 is connected to the holding rod 10;

[0029] A limiting member 30, the limiting member 30 is arranged on the second end face of the molten steel dipping plate 20, and the second end face is opposite to the first end face.

[0030] The molten steel sampling device disclosed in the embodiment of the present utility model, by adopting the molten steel dipping plate 20, in steelmaking production or experiments, after inserting the molten steel dipping plate 20 into the molten steel and keeping it for a certain time (such as 3 - 10 s) and then taking it out, the molten steel containing inclusions is rapidly cooled on the surface of the molten steel dipping plate 20, so that the inclusions are fixed inside or on the surface of the solidified steel shell of the molten steel dipping panel. Then, after grinding and polishing the cooled molten steel dipping plate 20, detections are carried out (such as using a scanning electron microscope or ultrasonic detection), and the quantity, size, morphology and distribution of the inclusions in the molten steel can be obtained, so as to more accurately guide experiments and industrial production according to the behavior of the inclusions in the molten steel. Inclusions in molten steel generally refer to particulate matters such as alumina, magnesia and calcium aluminate mixed in the molten steel.

[0031] Furthermore, a limiting member 30 is adopted to limit the depth of the molten steel sampling device inserted into the molten steel, and molten steel samples with different depths or a fixed depth can be taken according to actual needs. This can avoid defects or insufficient representativeness of the taken molten steel, and at the same time, the sampling depth can be accurately determined, ensuring that the molten steel taken out by the molten steel sampling device can correctly represent the quantity, size, morphology and distribution of the inclusions in the molten steel, ensuring more accurate guidance of experiments and industrial production according to the inclusion behavior in steelmaking production or experiments. Moreover, the molten steel sampling device disclosed in the embodiment of the present utility model has a simple structure, is convenient to operate, and is conducive to wide use in steelmaking production. In some embodiments, the limiting member 30 is a telescopic structure, so that the length of the limiting member 30 can be adjusted according to actual requirements. For example, the limiting member 30 can include a first part and a second part slidably connected to the first part, and the length of the limiting member 30 is changed by sliding the second part; or the limiting member 30 can be composed of multiple detachably connected segments, and the length of the limiting member 30 is changed by assembling different numbers of segments. In some embodiments, the limiting member 30 can be detachably arranged on the molten steel dipping plate 20 by means of, for example, threaded connection, snap connection, etc., so that the limiting member 30 with different lengths can be replaced according to actual situations.

[0032] The molten steel sampling device disclosed in the embodiment of the present utility model can be applied to the sampling of molten steel in an LF ladle refining furnace, an RH furnace, a tundish, and a crucible.

[0033] In some embodiments, the holding rod 10 includes a vertical rod 11 and an inclined rod 12. One end of the vertical rod 11 is perpendicularly connected to the first end face of the molten steel dipping plate 20, and the other end of the vertical rod 11 is connected to one end of the inclined rod 12. In this embodiment, by setting the vertical rod 11, it can be ensured that the molten steel dipping plate 20 is perpendicularly inserted into the molten steel, which is beneficial to ensuring the accurate depth of the molten steel dipping plate 20 inserted into the molten steel. In addition, by connecting the vertical rod 11 and the inclined rod 12, the overall length of the holding rod 10 can be reduced, which is convenient for storing the molten steel sampling device and also convenient for the holding operation of the sampling personnel during sampling.

[0034] In some embodiments, a handle ring (not shown in the drawings) is provided at the other end of the inclined rod 12. The provision of the handle ring facilitates the placement and picking up of the molten steel sampling device.

[0035] In some embodiments, after the vertical rod 11 is connected to the inclined rod 12, the inclined rod 12 forms a predetermined angle θ with the horizontal plane. In this embodiment, by making the inclined rod 12 form a predetermined angle θ with the horizontal plane, on the one hand, it is convenient for the sampling personnel to hold the molten steel sampling device during sampling and to conveniently operate the molten steel dipping plate 20 to insert it into the molten steel, and ensures that the molten steel dipping plate 20 is vertically inserted into the molten steel; on the other hand, it is beneficial for the sampling personnel to adjust their positions outside the ladle, ensuring the safety of the sampling personnel.

[0036] In some embodiments, the predetermined angle θ between the inclined rod 12 and the horizontal plane is 30 to 60°. In this embodiment, it is convenient for the sampling personnel to hold the molten steel sampling device and to insert the molten steel dipping plate into the molten steel, which is beneficial for the sampling personnel to observe the molten steel and is beneficial for ensuring the safety of the sampling personnel. It can be understood that the angle between the inclined rod 12 and the horizontal plane can be adjusted according to the actual ladle for sampling and the spatial working conditions of the actual equipment, and is not limited to the angle in this embodiment. The inclined rod 12 can be pivotally connected to the vertical rod 11 through a rotating shaft, so that the angle between the inclined rod 12 and the horizontal plane is adjustable.

[0037] In some embodiments, the length of the vertical rod 11 is 0.8 to 1.5 m, and the length of the inclined rod 12 is 1.8 to 2.2 m. In this embodiment, the length of the inclined rod 12 is greater than that of the vertical rod 11, which facilitates the staff to hold and control the inclined rod 12, is beneficial for the sampling personnel to adjust their positions outside the ladle, and is beneficial for ensuring the safety of the sampling personnel.

[0038] In some embodiments, the molten steel dipping plate 20 is a cube-shaped plate or a rectangular parallelepiped-shaped plate. In this embodiment, since the molten steel dipping plate 20 is a plate-shaped object, the molten steel can be directly adhered to the plate-shaped object, avoiding defects such as shrinkage cavities and porosity existing due to the use of a sampling cup and the problem of insufficient representativeness of the sampling range, ensuring that the molten steel taken out by the molten steel sampling device can correctly characterize the quantity, size, morphology, distribution, etc. of the inclusions in the molten steel, and at the same time being beneficial for subsequent direct treatment of the molten steel dipping plate, facilitating the subsequent detection of the molten steel sample, with convenient operation and being beneficial for improving the detection efficiency.

[0039] In some embodiments, the thickness of the molten steel dipping plate 20 is 3 to 10 mm, the width is 200 to 500 mm, and the height is 300 to 600 mm. If the thickness of the molten steel dipping plate 20 is too small, it will cause the molten steel dipping plate 20 to be deformed by heat during the sampling process, resulting in difficulty in processing the sample after sampling. If the width and height of the molten steel dipping plate 20 are too small, the sampling area will be too small and the representativeness of the sample will be insufficient. If the size of the molten steel dipping plate 20 is too large, the sampling device will be too heavy to operate. By adopting a suitable size for the molten steel dipping plate 20, it is possible to ensure the representativeness of the sampling range, prevent the deformation of the molten steel dipping plate during the sampling process, and avoid the difficulty in operating the molten steel sampling device due to excessive weight.

[0040] In some embodiments, the limiting member 30 is 1 to 3 metal columns of the same length. On the one hand, using metal columns is conducive to the convenient manufacture of the molten steel sampling device, reducing the complexity of the manufacturing process and the cost. On the other hand, by using metal columns, the length of the metal columns can be adjusted, so that the position of the bottom of the molten steel dipping plate relative to the bottom of the ladle can be determined according to the actual sampling position, and the operation is simple and easy to implement.

[0041] In some embodiments, the length of the metal column is 100 to 1000 mm. By setting the length of the metal column, it is possible to prevent the molten steel dipping plate from being inserted too deeply and contacting the bottom of the molten steel container, which is beneficial to avoiding the disturbance of the molten steel by the molten steel dipping plate and affecting the quality of the molten steel. It can be understood that the length of the metal column can be adjusted according to the actual need to take molten steel samples at different depths, and is not limited to the length size in this embodiment.

[0042] In some embodiments, the holding rod, the molten steel dipping plate and the limiting member are all made of high melting point metals with a melting point higher than the temperature of the molten steel (1500 °C), such as heat-resistant steel. This can prevent melting or deformation during the sampling process, thus affecting the smooth progress of sampling.

[0043] In summary, for the molten steel sampling device disclosed in the embodiments of the present utility model, by using a molten steel dipping plate, when in use, the molten steel dipping plate is inserted into the molten steel and taken out after a certain period of time. Then, the molten steel containing inclusions is rapidly cooled on the surface of the molten steel dipping plate, so that the inclusions are fixed inside or on the surface of the solidified steel shell of the molten steel dipping panel. After the cooled molten steel dipping plate is ground and polished, detection can be carried out to obtain the behavior of the inclusions in the molten steel. At the same time, a limiting member is used to limit the depth of the molten steel sampling device inserted into the molten steel, and molten steel samples with different depths or a fixed depth can be taken according to actual needs. The present utility model solves the technical problems of shrinkage cavities, porosity and other defects in the sampled molten steel caused by inappropriate shapes and volumes of the sampling cups, insufficient representativeness of the sampling range, and inability to accurately determine the sampling depth, thereby ensuring that the molten steel taken out by the molten steel sampling device can correctly characterize the quantity, size, morphology, distribution, etc. of the inclusions in the molten steel, and thus ensuring more accurate guidance of experiments and industrial production according to the inclusion behavior in steelmaking production or experiments.

[0044] It should be particularly noted that each component or step in the above-mentioned various embodiments can be mutually crossed, replaced, added, or deleted. Therefore, the combinations formed by these reasonable permutations and combinations should also fall within the protection scope of the present utility model, and the protection scope of the present utility model should not be limited to the above-mentioned embodiments.

[0045] The above are the exemplary embodiments disclosed by the present utility model. The order of disclosure of the above embodiments of the present utility model is only for description and does not represent the superiority or inferiority of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of disclosure of the embodiments of the present utility model (including the claims) is limited to these examples. Without departing from the scope defined by the claims, various changes and modifications can be made. In addition, although the elements disclosed in the embodiments of the present utility model can be described or claimed in individual form, they can also be understood as multiple unless explicitly limited to the singular.

[0046] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of disclosure of the embodiments of the present utility model (including the claims) is limited to these examples; under the concept of the embodiments of the present utility model, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present utility model as described above, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present utility model should be included in the protection scope of the embodiments of the present utility model.

Claims

1. A molten steel sampling device, characterized in that, Comprising: A holding rod; A molten steel dipping plate, the first end face of the molten steel dipping plate is connected to the holding rod; A limiting member, the limiting member is arranged on the second end face of the molten steel dipping plate, and the second end face is oppositely arranged with the first end face.

2. The molten steel sampling device according to claim 1, wherein, The holding rod includes a vertical rod and an inclined rod, one end of the vertical rod is vertically connected to the first end face of the molten steel dipping plate, and the other end of the vertical rod is connected to one end of the inclined rod.

3. The molten steel sampling device according to claim 2, characterized in that, A handle ring is arranged at the other end of the inclined rod.

4. The molten steel sampling device according to claim 2, characterized in that, After the vertical rod is connected to the inclined rod, the inclined rod forms a predetermined angle with the horizontal plane.

5. The molten steel sampling device according to claim 4, wherein, The predetermined angle is 30 to 60°.

6. The molten steel sampling device according to claim 2, characterized in that, The length of the vertical rod is 0.8 to 1.5 m, and the length of the inclined rod is 1.8 to 2.2 m.

7. The molten steel sampling device according to claim 1, characterized in that, The molten steel dipping plate is a cube-shaped plate or a cuboid-shaped plate.

8. The molten steel sampling device according to claim 7, characterized in that, The thickness of the molten steel dipping plate is 3 to 10 mm, the width is 200 to 500 mm, and the height is 300 to 600 mm.

9. The molten steel sampling device according to claim 1, characterized in that, The limiting member is 1 to 3 metal columns with the same length.

10. The molten steel sampling device according to claim 9, wherein, The length of the metal column is 100 to 1000 mm.

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