A device for cleaning steel slag on the surface of a billet

Abstract

The application discloses a device for cleaning steel slag on the surface of a steel billet, relates to the technical field of steelmaking equipment, and is installed on a continuous casting billet conveying roller bed and comprises a mounting plate, a billet through hole is formed in the mounting plate, and the steel billet passes through the through hole; three mounting hinge joints are arranged on the mounting plate and are respectively hinged to first, second and third clamping arms; one end of the first clamping arm is hinged to a driving cylinder, the other end of the driving cylinder is hinged to the mounting plate, and a first blade is connected to the first clamping arm; the first clamping arm and the second clamping arm are connected through a first connecting rod assembly, and a second blade is connected to the second clamping arm; the first clamping arm and the third clamping arm are connected through a second connecting rod assembly, and a third blade and a fourth blade which are perpendicular to each other are connected to the third clamping arm; and the first blade, the second blade, the third blade and the fourth blade are close to each other and are combined into a rectangular blade frame. The device can effectively clean various sizes of steel slag attached to the surface of the steel billet, and the cleanliness of the surface of the steel billet is ensured.

Description

Technical Field

[0001] This invention relates to the field of steelmaking equipment technology, and in particular to a device for cleaning steel slag from the surface of steel billets. Background Technology

[0002] During the gradual cooling process of continuous casting billets in steelmaking plants, the surface of the billets reacts with oxygen in the air to form iron oxide scale. Steel slag that may be generated on the surface during continuous casting, especially when the billets are cut to length with a flame cutting machine after exiting the second cooling chamber, will produce residual slag at the ends (it was found on site that due to thermal expansion and contraction, the residual slag at this point was obviously raised after flame cutting). If the steel mill does not clean the slag off the surface of the billet during the subsequent billet rolling process, the residual slag at the head of the billet will prevent the billet from entering the rolling mill normally, causing the equipment to malfunction or be damaged. The billet and slag are pressed into the steel by the rolling equipment, resulting in defects on the surface of the rolled product and inclusions inside, which greatly restricts the quality of the finished steel product. In severe cases, it can lead to product scrapping and cause serious economic losses to the enterprise. To meet the quality requirements of finished steel billets from rolling mills, steel mills need to treat surface slag. However, current cleaning devices such as descaling machines in rolling mills can only remove small slag, and larger slag cannot be effectively removed, causing slag to be rolled into the surface of the steel and forming defects. Summary of the Invention

[0003] The purpose of this invention is to provide a device for cleaning steel slag on the surface of steel billets. This device can effectively clean steel slag of various sizes adhering to the surface of steel billets, ensuring the cleanliness of the steel billet surface and preventing steel slag from affecting the rolling equipment during the steel billet rolling process, causing defects by being pressed into the steel surface, and generating inclusions inside the rolled product, thereby improving the surface quality of the steel billet and the quality of the product.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A device for cleaning slag from the surface of steel billets is installed on a continuous casting billet conveyor roller. The device includes a mounting plate with a billet through-hole for the billet to pass through. The mounting plate also has three mounting hinge points, which are respectively hinged to a first clamping arm, a second clamping arm, and a third clamping arm. The other end of the first clamping arm is hinged to the drive cylinder, the other end of the drive cylinder is hinged to the mounting plate, and the first blade is connected to the first clamping arm; The first clamping arm and the second clamping arm are connected by a first linkage assembly. The second clamping arm is connected to a second blade. The first blade and the second blade are brought close to each other until they are perpendicular to each other or far apart from each other until they form an obtuse angle through the first linkage assembly. The first clamping arm and the third clamping arm are connected by a second linkage assembly. The third clamping arm is connected with a third blade and a fourth blade that are perpendicular to each other. The third blade and the fourth blade are close to or away from the first blade through the second linkage assembly. The first blade, the second blade, the third blade and the fourth blade are close to each other and are assembled into a rectangular blade frame to remove steel slag from the surface of the billet when it passes through.

[0005] Furthermore, the first linkage assembly includes a fixed link hinged between the first clamping arm and the second clamping arm.

[0006] Furthermore, the mounting hinge point on the first clamping arm is located between its hinge point with the drive cylinder and the fixed link, and the hinge point between the second clamping arm and the fixed link is located between the second blade and its mounting hinge point.

[0007] Furthermore, the second linkage assembly includes a spring-loaded link hinged between the first clamping arm and the third clamping arm.

[0008] Furthermore, the mounting hinge point of the third clamping arm is located between the third blade and the spring buffer link.

[0009] Furthermore, the drive cylinder is a pneumatic cylinder.

[0010] Furthermore, a water mist dust removal hood is connected to the top of the mounting plate. The water mist dust removal hood is equipped with compressed air pipes and water pipes to remove dust from the rectangular blade frame using water mist.

[0011] Furthermore, the bottom of the mounting plate is provided with a debris collection trough for collecting debris and / or wastewater.

[0012] In summary, the present invention has the following beneficial effects: Using this billet surface slag cleaning device can effectively remove steel slag of various sizes adhering to the billet surface, ensuring the cleanliness of the billet surface, avoiding interference with the rolling equipment during the billet rolling process, preventing steel slag from being pressed into the steel surface and forming defects, and preventing inclusions from being generated inside the rolled product, thereby affecting the billet surface quality and product quality.

[0013] This device can be used independently to remove slag from the billet head and remove iron oxide scale from the billet surface. It can also be used in conjunction with a descaling agent in a steel rolling mill. When the descaling machine malfunctions, the operating cylinder causes the cutting blade to contact the billet surface, removing the iron oxide scale and ensuring the quality of the finished product. This device can be installed at the outlet roller conveyor of the steel rolling mill's heating furnace (after descaling) for slag removal from the rolled billets. It can also be installed at the hot billet inlet roller conveyor of the steel rolling mill's heating furnace for slag removal from the hot billets.

[0014] This device can also be integrated with the production of high-quality steel. In special product orders, it can serve as a pre-treatment step in the manual billet trimming and grinding process, reducing the workload of manual grinding and improving production efficiency. This device can be installed at the cooling bed conveyor roller table in a steel plant to perform slag removal before hot billet delivery or stacking. Attached Figure Description

[0015] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the device for cleaning steel slag from the surface of steel billets according to the present invention in the state of steel slag cleaning; Figure 2 This is a schematic diagram of the overall structure of the device for cleaning steel slag from the surface of steel billets according to the present invention during the steel billet conveying process.

[0017] In the figure, 1. Steel billet; 2. Drive cylinder; 3. First clamping arm; 4. Third clamping arm; 5. Second clamping arm; 6. Second connecting rod assembly; 7. First connecting rod assembly; 8. Rectangular blade frame; 9. Water mist dust removal hood; 10. Slag collection trough. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. These embodiments do not constitute a limitation of the present invention. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0019] A device for cleaning steel slag from the surface of steel billets, such as Figure 1 and Figure 2 As shown, it is installed on the continuous casting billet conveying roller table, including a mounting plate. The mounting plate has a billet through hole for the billet 1 to pass through. The mounting plate has three mounting hinge points, which are respectively hinged to the first clamping arm 3 (lower side), the second clamping arm 5 (right side) and the third clamping arm 4 (left side). The other end of the first clamping arm 3 is hinged to the drive cylinder 2 (the drive cylinder 2 is a pneumatic cylinder), and the other end of the drive cylinder 2 is hinged to the mounting plate. The first blade is detachably connected above the first clamping arm 3. The first clamping arm 3 and the second clamping arm 5 are connected by the first connecting rod assembly 7. The second blade is connected to the inner side of the second clamping arm 5. The first blade and the second blade are brought close to each other until they are perpendicular to each other or far apart from each other until they form an obtuse angle through the first connecting rod assembly 7. The first clamping arm 3 and the third clamping arm 4 are connected by the second link assembly 6. The inner side of the third clamping arm 4 is connected to the third blade and the fourth blade, which are perpendicular to each other. The third blade and the fourth blade are close to or away from the first blade through the second link assembly 6. The first blade (lower), the second blade (right), the third blade (upper) and the fourth blade (left) are close to each other to form a rectangular blade frame 8, which removes the steel slag from the surface of the billet 1 when it passes through.

[0020] like Figure 1 and Figure 2 As shown, in this embodiment, the first linkage assembly 7 includes a fixed linkage, which is hinged between the first clamping arm 3 and the second clamping arm 5; the mounting hinge point on the first clamping arm 3 is located between its hinge point with the drive cylinder 2 and the fixed linkage, the mounting hinge point of the second clamping arm 5 is located on the far right, and the hinge point of the second clamping arm 5 with the fixed linkage is located between the second blade and its mounting hinge point.

[0021] The second link assembly 6 includes a spring buffer link, which can also be replaced by a regular fixed link. The first link assembly 7 can also be replaced by this spring buffer link structure to make its rotation process smoother and reduce impact. The spring buffer link is hinged between the first clamping arm 3 and the third clamping arm 4 (lowest end). The mounting hinge point of the third clamping arm 4 is located between the upper third blade and the lower spring buffer link. The spring-loaded buffer rod can be replaced with other buffer rod elements. In this embodiment, it includes an outer cylinder and two piston rods. The two piston rods are inserted into both ends of the outer cylinder. One or both piston rods are slidably connected to the outer cylinder. The two piston rods are connected by a buffer spring, which achieves the buffering effect of the connecting rod. Corresponding grooves can be opened on the outer cylinder. Screws pass through the grooves and are radially threaded into the corresponding slidable piston rods to limit the sliding stroke of the piston rods through the grooves. An adjustment device can also be provided at one end of the spring buffer link to adjust the distance between the hinge points at both ends. For example, a waist-shaped groove can be opened at one end of the spring buffer link, and a rotating shaft at the corresponding hinge point can pass through the waist-shaped groove. Two nuts can be connected to the rotating shaft and pressed against the two sides of the waist-shaped groove respectively. The rotating shaft is rotatably connected to the corresponding first clamping arm 3 or third clamping arm 4. The position of the hinge point at that point can be adjusted by adjusting the waist-shaped groove, thereby adjusting the distance between the two hinge points. The two nuts can also be replaced with other fixed adjustment structures, such as a screw rod that passes through the waist-shaped groove and is threaded to the rotating shaft. The screw rod is only rotatably connected to the spring buffer link to adjust the position of the hinge point rotating shaft in the waist-shaped groove.

[0022] like Figure 1As shown, a water mist dust removal hood 9 is also connected to the top of the mounting plate. The water mist dust removal hood 9 is equipped with compressed air pipes and water pipes to remove dust from the rectangular blade frame 8. A slag collection trough 10 for collecting slag and wastewater is placed below the mounting plate. The slag collection trough 10 can be replaced by a forklift or other device, and its bottom can also be equipped with casters for easy removal and replacement.

[0023] Working principle: 1. When the steel billet 1 passes through the roller conveyor, the piston rod of the cylinder (drive cylinder 2) of the steel slag cleaning device extends and pushes the first clamping arm 3 below to move (when the first clamping arm 3 moves, the left end rises through the drive cylinder 2, and the right end descends around the mounting hinge point until the first blade on it is horizontal below the billet through hole). 2. The lower first clamping arm 3 drives the connected second clamping arm 5 and third clamping arm 4 through the spring buffer link (second link assembly 6) and the fixed link (first link assembly 7). (The descent of the upper right side of the first clamping arm 3 drives the second clamping arm 5 connected to it to descend around the mounting hinge point through the fixed connecting rod, until the second blade on the second clamping arm 5 is vertically on the right side of the blank through hole.) The lower right side of the first clamping arm 3 descends to the lower left, and the spring buffer rod drives the third clamping arm 4 connected to it to move, so that it moves to the left at the lower end and to the right at the upper end around the mounting hinge point, until the third blade on it is horizontal above the blank through hole and the fourth blade is vertical to the left side of the blank through hole.

[0024] 3. The first clamping arm 3, the second clamping arm 5, and the third clamping arm 4 are respectively hinged to the outer shell (mounting plate) of the cleaning device by pins, and a square hole slightly larger than the steel billet 1 is formed on the mounting plate.

[0025] 4. Each clamping arm is equipped with a blade. After the drive cylinder 2 extends to the position, the four blades make corresponding contact with the four sides of the billet 1. The four sides of the billet 1 can also be set with gaps between the corresponding blades (so that various types of billets 1 with different end faces can be removed).

[0026] 5. During the forward conveying of billet 1 via the roller conveyor, the blades can effectively remove steel slag from the surface of billet 1. During the removal process, the compressed air pipeline and water pipeline inside the water mist dust removal hood 9 can open the solenoid valve through the heat detection signal, and the compressed air and water can be used to flush in time, sweep away the debris at the blades, and perform water mist dust removal.

[0027] 6. After billet 1 passes through, the piston rod of drive cylinder 2 retracts, the water and air solenoid valves close, and each clamping arm opens, waiting for the next billet 1 to pass through, and then the steel slag is cleaned.

[0028] 7. After processing one batch of steel billets, the slag collection trough 10 at the bottom of the slag removal device can be replaced online.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within the scope of its essence and protection. Such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A device for cleaning steel slag from the surface of steel billets, characterized in that: Installed on the continuous casting billet conveying roller, including a mounting plate, the mounting plate has a billet through hole for the billet (1) to pass through; the mounting plate has three mounting hinge points, which are respectively hinged to the first clamping arm (3), the second clamping arm (5) and the third clamping arm (4). The other end of the first clamping arm (3) is hinged to the drive cylinder (2), the other end of the drive cylinder (2) is hinged to the mounting plate, and the first blade is connected to the first clamping arm (3); The first clamping arm (3) and the second clamping arm (5) are connected by a first link assembly (7). The second clamping arm (5) is connected to a second blade. The first blade and the second blade are brought close to each other or perpendicular to each other or far apart from each other to form an obtuse angle through the first link assembly (7). The first clamping arm (3) and the third clamping arm (4) are connected by a second link assembly (6). The third clamping arm (4) is connected with a third blade and a fourth blade that are perpendicular to each other. The third blade and the fourth blade are close to or away from the first blade through the second link assembly (6). The first blade, the second blade, the third blade and the fourth blade are close to each other to form a rectangular blade frame (8) to remove steel slag from the surface of the billet (1) when it passes through.

2. The apparatus for cleaning steel slag from the surface of steel billets according to claim 1, characterized in that: The first linkage assembly (7) includes a fixed link hinged between the first clamping arm (3) and the second clamping arm (5).

3. The apparatus for cleaning steel slag from the surface of steel billets according to claim 2, characterized in that: The mounting hinge point on the first clamping arm (3) is located between its hinge point with the drive cylinder (2) and the fixed connecting rod, and the hinge point of the second clamping arm (5) with the fixed connecting rod is located between the second blade and its mounting hinge point.

4. The apparatus for cleaning steel slag from the surface of steel billets according to claim 1 or 3, characterized in that: The second linkage assembly (6) includes a spring-loaded link hinged between the first clamping arm (3) and the third clamping arm (4).

5. The apparatus for cleaning steel slag from the surface of steel billets according to claim 4, characterized in that: The mounting hinge point of the third clamping arm (4) is located between the third blade and the spring buffer link.

6. The apparatus for cleaning steel slag from the surface of steel billets according to claim 1, characterized in that: The drive cylinder (2) is a pneumatic cylinder.

7. The apparatus for cleaning steel slag from the surface of steel billets according to claim 1, characterized in that: The top of the mounting plate is also connected to a water mist dust removal hood (9), which is equipped with compressed air pipes and water pipes to remove dust from the rectangular blade frame (8).

8. The apparatus for cleaning steel slag from the surface of a steel billet according to claim 1 or 7, characterized in that: The bottom of the mounting plate is provided with a debris collection trough (10) for collecting debris and / or wastewater.

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