A device for preventing strip steel from being scratched during production of a hot-rolling and casting rack

Abstract

The utility model discloses a kind of anti-strip steel scratch device for hot rolling casting frame production, including work roll and transmission shaft;Work roll is arranged in the inside of rack, transmission shaft is arranged at the both ends of work roll, and the surface of work roll is provided with mounting portion;The utility model constructs the physical isolation barrier between strip steel and work roll by anti-scratch lining plate, avoids the direct contact of strip steel and work roll metal surface, and anti-scratch lining plate uses high wear resistance, low friction coefficient material, can effectively resist the friction effect in strip steel conveying process, reduce the friction damage on the surface of strip steel;By the existence of anti-scratch lining plate, work roll avoids direct friction with strip steel and impurity, prolongs the service life of work roll, reduces equipment investment cost;By detachable connection mode between anti-scratch lining plate and work roll, when anti-scratch lining plate appears abrasion, damage due to long-term use, only need to carry out individual replacement by disassembling bolt, shorten maintenance time.

Description

Technical Field

[0001] This utility model relates to the field of hot rolling mill stand production technology, specifically a device for preventing strip steel scratches during hot rolling mill stand production. Background Technology

[0002] When the transmission and power units of a single stand in a hot-rolled sheet metal mill malfunction, the industry typically employs two methods: First, shut down the mill and wait for repairs or replacements before resuming production. However, repairing or replacing these transmission and power units takes a considerable amount of time, resulting in significant production losses. Second, discard the faulty mill and wrap wool felt or similar materials around the lower work rolls to prevent scratches. The disadvantage of this method is that the wool felt has a short lifespan under the high-temperature baking and friction of the strip, and carbonized wool felt can also cause scratches and abrasions to the strip. Frequent shutdowns are necessary to remove and replace the wool felt, which is time-consuming, material-intensive, and labor-intensive.

[0003] In view of this, we have introduced a device to prevent strip steel from being scratched during hot rolling mill production. Utility Model Content

[0004] The purpose of this utility model is to provide a device for preventing strip steel from being scratched during hot rolling mill production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for preventing strip steel scratching during hot rolling mill production, comprising: a work roll and a drive shaft; The work roll is located inside the frame, the drive shaft is located at both ends of the work roll, and the surface of the work roll is provided with mounting parts; The working roll has an internal placement groove, and a metal flexible tube is installed inside the placement groove, with both ends of the metal flexible tube extending to the outside of the working roll. The top of the mounting section is equipped with an anti-scratch mechanism. The anti-scratch liner of the anti-scratch mechanism works in conjunction with the water pipe pressure plate connected to the bottom of the anti-scratch liner to protect the working roller from scratches.

[0006] Preferably, the anti-scratch mechanism includes bolt holes A on the surface of the anti-scratch liner, bolt holes B equally spaced on the surface of the placement groove, bolt holes A and bolt holes B aligned, a water pipe pressure plate positioned on top of the metal hose, the water pipe pressure plate located at the bottom of the anti-scratch liner, and the anti-scratch liner detachably connected to the surface of the mounting part. Bolts are connected to the surface of the anti-scratch liner, and the bolts penetrate bolt holes A and enter into bolt holes B. The bolts used for connection are made of high-strength alloy steel and have undergone heat treatment, possessing excellent fatigue resistance and capable of withstanding the vibration and impact generated during the rotation of the work roller. The detachable design of the anti-scratch liner allows for replacement without disassembling the entire work roller after wear occurs, greatly shortening maintenance time and reducing production downtime costs.

[0007] Preferably, the working roller has a positioning part located above the placement groove inside, and a water pipe pressure plate is installed on the surface of the positioning part. The surface of the water pipe pressure plate has screw holes A, and the surface of the positioning part has screw holes B at equal intervals. Screw holes A and B are aligned, and screws connect them. The threads of screw holes A and B are of the same specification and use a fine-pitch thread design, which has better self-locking performance than coarse-pitch threads, effectively preventing the screws from loosening during the vibration of the working roller. The screws connecting the two are also equipped with spring washers to further enhance the anti-loosening effect of the threaded connection, ensuring that the water pipe pressure plate is stably fixed on the positioning part for a long time.

[0008] Preferably, the surface of the metal hose is provided with a water outlet, and the surface of the water pipe pressure plate is provided with water outlet holes A at equal intervals at the center position. The surface of the anti-scratch liner is provided with water outlet holes B corresponding to the water outlets. The positions of water outlet holes A and water outlet holes B are one-to-one, and the diameter of the two holes gradually increases slightly from the inside to the outside. This ensures that the water flow will not be blocked when passing through, and at the same time, the water flow is evenly distributed on the surface of the anti-scratch liner, achieving comprehensive cooling and cleaning, and avoiding the impact of excessive temperature or impurity accumulation in local areas on the anti-scratch effect.

[0009] Preferably, the working roller has mounting grooves at both ends of its surface for placing the metal hose; the mounting grooves at both ends of the working roller surface are arc-shaped, and their curvature is perfectly matched with the outer curvature of the metal hose, so that the end of the metal hose fits tightly in the mounting groove, preventing the metal hose from shaking or shifting when the working roller rotates.

[0010] Preferably, the bottom of the water pipe pressure plate is provided with an arc-shaped groove for fixing the metal hose; the arc-shaped groove at the bottom of the water pipe pressure plate is processed by precision stamping process to ensure that the groove wall is smooth and the curvature is consistent, so that it can fit tightly with the surface of the metal hose and form a reliable fixing effect.

[0011] Preferably, an anti-rotation fixing block is provided on the side of the drive shaft; the contact surface between the anti-rotation fixing block and the drive shaft is polished to reduce friction between them.

[0012] Compared with the prior art, the beneficial effects of this utility model are: (1) By designing the anti-scratch liner, a physical isolation barrier is constructed between the strip and the work roll, avoiding direct contact between the metal surface of the strip and the work roll. The anti-scratch liner is made of a high wear-resistant and low friction coefficient material, which can effectively resist the friction during the strip conveying process and reduce friction damage to the strip surface. At the same time, with the lubrication of the cooling medium, the frictional resistance between the strip and the liner is further reduced, avoiding defects such as scratches and indentations on the strip surface caused by excessive friction. (2) The presence of anti-scratch liner prevents the working roll from directly rubbing against the strip and impurities, reducing wear, scratches and other damage on the surface of the working roll, and extending the service life of the working roll. As the core component of the hot rolling mill stand, the working roll has a high replacement cost. Extending its service life can significantly reduce the replacement frequency of the equipment and reduce the equipment investment cost. (3) By adopting a detachable connection between the anti-scratch liner and the working roller, when the anti-scratch liner is worn or damaged due to long-term use, it can be replaced by simply removing the bolts, without having to replace the entire working roller, which simplifies the maintenance operation process and shortens the maintenance time. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention during an overall explosion; Figure 2 This is a schematic diagram of the overall installation of this utility model; Figure 3 This is a three-dimensional structural diagram of the working roller of this utility model; Figure 4 This is a top view of the working roller of this utility model. Figure 5 This is a three-dimensional structural diagram of the anti-scratch lining plate of this utility model; Figure 6 This is a side sectional view of the anti-scratch liner of this utility model; Figure 7 This is a schematic diagram of the structure of the metal flexible hose of this utility model; Figure 8 This is a schematic diagram of the structure of the water pipe pressure plate of this utility model.

[0014] In the diagram: 1. Working roller; 2. Drive shaft; 3. Mounting groove; 4. Mounting part; 5. Bolt hole B; 6. Placement groove; 7. Positioning part; 8. Screw hole B; 9. Water outlet; 10. Metal hose; 11. Water pipe pressure plate; 12. Anti-scratch liner; 13. Bolt hole A; 14. Water outlet B; 15. Anti-rotation fixing block; 16. Screw hole A; 17. Water outlet A; 18. Arc groove. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved with", "connected", etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0017] Please see Figure 1-8 This utility model provides a technical solution: a strip steel anti-scratching device for hot rolling mill stand production, comprising: a work roll 1 and a drive shaft 2, wherein the work roll 1, as a key support and guide component in the strip steel transmission process, is horizontally arranged inside the stand and can rotate stably around its own axis; the drive shaft 2 is used to transmit power to drive the work roll 1 to rotate, and is symmetrically arranged at both ends of the work roll 1, and is fixedly connected to the work roll 1 to ensure the stability of power transmission. On the surface of the work roll 1, along its length, there is a mounting part 4 for installing anti-scratching related components. This mounting part 4 has a groove structure, which can accurately position the subsequently installed anti-scratching mechanism, ensuring the firmness and consistency of the connection between the anti-scratching mechanism and the work roll 1. The working roller 1 has a placement groove 6 inside, and a metal hose 10 is installed inside the placement groove 6. The two ends of the metal hose 10 extend to the outside of the working roller 1. The top of the mounting part 4 is provided with an anti-scratch mechanism. The anti-scratch liner 12 of the anti-scratch mechanism works in conjunction with the water pipe pressure plate 11 connected to the bottom of the anti-scratch liner 12 to protect the working roller 1 from being scratched.

[0018] The anti-scratch mechanism specifically includes: multiple bolt holes A13 for connection and fixing are equally spaced along the length of the surface of the anti-scratch liner 12. The number of bolt holes A13 is consistent with the number of bolt holes B5 on the surface of the subsequent placement groove 6, and the hole diameters match. Correspondingly, multiple bolt holes B5 are also equally spaced along the length of the surface of the placement groove 6. When installing the anti-scratch liner 12, it is necessary to ensure that the bolt holes A13 and B5 are precisely aligned so that they can be fixed by bolts. The water pipe pressure plate 11 is set on the top of the metal hose 10, and its length is adapted to the length of the metal hose 10. The top area of ​​the metal hose 10 is completely covered, and the water pipe pressure plate 11 is located at the bottom of the anti-scratch liner 12. The two fit tightly together, and the anti-scratch liner 12 is installed on the surface of the mounting part 4 by means of a detachable connection. This detachable design facilitates the replacement and maintenance of the anti-scratch liner 12 in the future. On the surface of the anti-scratch liner 12, a high-strength bolt is connected at the position corresponding to the bolt hole A13. The bolt passes through the bolt hole A13 and enters the bolt hole B5 in sequence, and tightly engages with the thread on the inner wall of the bolt hole B5, thereby firmly connecting the anti-scratch liner 12, the water pipe pressure plate 11 and the working roller 1 into a whole.

[0019] Inside the working roller 1, above the placement groove 6, there is a positioning part 7 for positioning the water pipe pressure plate 11. The positioning part 7 is a planar structure that matches the shape of the water pipe pressure plate 11, which can ensure the accurate positioning of the water pipe pressure plate 11 during installation and avoid misalignment. The water pipe pressure plate 11 is fixedly installed on the surface of the positioning part 7 by screws. On the surface of the water pipe pressure plate 11, there are multiple screw holes A16 at equal intervals along its length. Correspondingly, on the surface of the positioning part 7, there are also multiple screw holes B8 at equal intervals along its length. The number and diameter of screw holes A16 and screw holes B8 are the same. When installing the water pipe pressure plate 11, the screw holes A16 and screw holes B8 must be precisely aligned. A special fixing screw connects the screw holes A16 and screw holes B8. The screw passes through the screw hole A16 and is threaded into the screw hole B8, which further enhances the firmness of the installation of the water pipe pressure plate 11 and prevents it from loosening during the rotation of the working roller 1.

[0020] The surface of the metal hose 10 is provided with a water outlet 9, and the surface of the water pipe pressure plate 11 is provided with water outlet holes A17 at equal intervals at the center position. The surface of the anti-scratch liner 12 is provided with water outlet holes B14 corresponding to the water outlet 9. The position of the water outlet holes B14 corresponds one-to-one with the water outlet holes A17, and the hole diameters are matched, so that the water flowing out of the water outlet holes A17 can further flow through the water outlet holes B14 to the surface of the anti-scratch liner 12, cool the anti-scratch liner 12 and the strip steel in contact with it, and clean the surface impurities, thereby improving the anti-scratch effect.

[0021] The working roller 1 has mounting grooves 3 at both ends for placing the metal hose 10; the mounting groove 3 is an arc-shaped groove structure, the size of which matches the outer diameter of the metal hose 10, and both ends of the metal hose 10 can be placed in the mounting groove 3.

[0022] The bottom of the water pipe pressure plate 11 is provided with an arc-shaped groove 18 for fixing the metal hose 10; the arc of the arc-shaped groove 18 is completely consistent with the outer arc of the metal hose 10, which firmly fixes the metal hose 10 in the placement groove 6, preventing the metal hose 10 from shaking or shifting during the rotation of the working roller 1, ensuring that the water outlet 9 and the water outlet hole A17 are always aligned, and ensuring stable water output.

[0023] An anti-rotation fixing block 15 is provided on the side of the drive shaft 2. The anti-rotation fixing block 15 is made of high-strength metal material. One end is fixedly connected to the frame, and the other end is tightly fitted to the side of the drive shaft 2. When the device needs to be maintained or repaired and the rotation of the working roller 1 needs to be stopped, the anti-rotation fixing block 15 can restrict the rotation of the drive shaft 2 to avoid safety accidents or equipment damage caused by accidental rotation, and improve the safety of the device during use.

[0024] Specifically, before the device is put into use, the precise assembly of each core component must be completed to lay the foundation for the subsequent anti-scratch function. First, the work roll 1 is installed in the preset position inside the hot rolling mill frame to ensure that the axis of the work roll 1 is coaxial with the transmission system of the frame to avoid extra friction caused by eccentricity during operation. Then, the drive shaft 2 is fixed at both ends of the work roll 1. As a power transmission component, the connection between the drive shaft 2 and the work roll 1 must be rigid. At the same time, anti-rotation fixing blocks 15 are installed on the side of the drive shaft 2. Through the cooperation of the anti-rotation fixing blocks 15 and the frame, the circumferential rotation offset of the drive shaft 2 during operation is limited to ensure that the work roll 1 always rotates stably at the preset speed, and to avoid irregular friction between the strip and the work roll 1 caused by the unstable rotation of the drive shaft 2, which would lead to strip scratches. Next, the installation of the metal hose 10 is handled. Mounting grooves 3 are pre-cut at both ends of the surface of the work roller 1 for placing the metal hose 10. The two ends of the metal hose 10 are respectively embedded into the mounting grooves 3, so that the main body of the metal hose 10 is laid in the placement groove 6 inside the work roller 1. The main function of the metal hose 10 is to transport cooling medium (such as cooling water). Its two ends extend to the outside of the work roller 1 for easy connection to an external cooling medium supply system. To ensure the stability of the metal hose 10 within the placement groove 6 and to prevent displacement or shaking of the metal hose 10 when the work roller 1 rotates, a positioning part 7 is also provided inside the work roller 1 above the placement groove 6. The water pipe pressure plate 11 is installed on the surface of the positioning part 7. The bottom of the water pipe pressure plate 11 is provided with an arc-shaped groove 18 for fixing the metal hose 10. The shape of the arc-shaped groove 18 matches the outer contour of the metal hose 10. When the water pipe pressure plate 11 is installed in place, the arc-shaped groove 18 can fit tightly against the surface of the metal hose 10, effectively clamping and fixing the metal hose 10 to prevent the metal hose 10 from moving during the operation of the working roller 1. At the same time, screw holes A16 are provided on the surface of the water pipe pressure plate 11, and screw holes B8 are provided at equal intervals on the surface of the positioning part 7. The screws are passed through the screw holes A16 and screwed into the screw holes B8 to achieve a rigid connection between the water pipe pressure plate 11 and the positioning part 7, further enhancing the stability of the metal hose 10 and ensuring that the cooling medium can be stably delivered. Finally, the anti-scratch mechanism is assembled. The core component of the anti-scratch mechanism is the anti-scratch liner 12, which has bolt holes A13 on its surface. Bolt holes B5 are equally spaced on the surface of the placement groove 6. When installing the anti-scratch liner 12, it should be placed on top of the mounting part 4, and the bottom of the anti-scratch liner 12 should be in contact with the top of the water pipe pressure plate 11. At the same time, ensure that the bolt holes A13 and B5 are precisely aligned. Then, the bolts are passed through the bolt holes A13 and screwed into the bolt holes B5 to achieve a detachable connection between the anti-scratch liner 12 and the work roll 1. The anti-scratch liner 12 is made of a high wear-resistant and low friction coefficient material. Its top surface is the working surface that directly contacts the strip steel. It can form a protective barrier between the strip steel and the work roll 1, avoiding direct contact between the strip steel and the metal surface of the work roll 1, and fundamentally reducing the risk of strip steel scratches. After the device is pre-installed and started, the external power system drives the work roll 1 to rotate at a preset speed through the drive shaft 2. Under the action of the conveying mechanism of the hot rolling mill stand, the strip steel maintains close contact with the anti-scratch liner 12 on the surface of the work roll 1 and is conveyed forward as the work roll 1 rotates. In this process, the anti-scratch liner 12 plays a core anti-scratch role: on the one hand, its high wear resistance can withstand the friction during the conveying process of the strip steel, and prevent itself from losing its protective effect due to excessive wear; on the other hand, the low friction coefficient surface can reduce the frictional resistance between the strip steel and the anti-scratch liner 12, reduce the surface damage of the strip steel during the conveying process, and at the same time prevent the strip steel from stretching or deviating due to excessive friction, ensuring that the strip steel can maintain a flat and stable conveying state. The anti-scratch lining 12 is assembled in sets. If a set of anti-scratch lining 12 is damaged, only the damaged anti-scratch lining 12 needs to be replaced, making it more convenient to use. Simultaneously, the cooling system is activated, and external cooling medium (cooling water) enters the metal hose 10 through its inlet. Since the metal hose 10 has an outlet 9 on its surface, and the water pipe pressure plate 11 has evenly spaced outlet holes A17 at its center, and the anti-scratch liner 12 has outlet holes B14 corresponding to the outlet 9, when the cooling medium flows within the metal hose 10, it flows out through the outlet 9, passes through outlet holes A17 and B14 in sequence, and is finally sprayed onto the contact surface between the anti-scratch liner 12 and the strip steel. The cooling medium's function is mainly twofold: firstly, to cool the anti-scratch liner 12 and the strip steel. During hot rolling, the strip steel itself carries a high temperature, and heat transfer occurs when it comes into contact with the anti-scratch liner 12. If the temperature is too high, it will not only affect the material properties of the anti-scratch liner 12 (such as reducing wear resistance and increasing brittleness), but may also cause oxidation of the strip surface or generate thermal stress, leading to surface quality problems. By spraying the cooling medium, the heat in the contact area can be removed in time, and the temperature of the anti-scratch liner 12 and the strip can be controlled within a reasonable range to ensure the stability of their performance. Secondly, it plays a lubricating and cleaning role. The cooling medium forms a thin film on the contact surface, which can further reduce the coefficient of friction between the strip and the anti-scratch liner 12 and reduce friction damage. At the same time, the cooling medium can also wash away any iron oxide scale, dust and other impurities that may exist on the surface of the strip, preventing impurities from being trapped between the strip and the anti-scratch liner 12, causing scratches on the surface of the strip or aggravating local wear of the anti-scratch liner 12. Throughout the operation, the various components work together to form a complete anti-scratch and cooling system: the anti-rotation fixing block 15 ensures the stable rotation of the work roller 1, providing a foundation for the smooth conveying of the strip steel; the metal hose 10, fixed by the water pipe pressure plate 11, stably conveys the cooling medium; the water pipe pressure plate 11 not only fixes the metal hose 10 but also provides installation support for the anti-scratch liner 12; the anti-scratch liner 12 is in direct contact with the strip steel, playing a core role in anti-scratch; the cooling medium is precisely sprayed through the channels of each component to achieve cooling, lubrication, and cleaning functions, jointly ensuring the surface quality of the strip steel during the hot rolling mill stand production process.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing strip steel scratching during hot rolling mill stand production, characterized in that, include: The working roller (1) and the drive shaft (2) are provided. The working roller (1) is located inside the frame, and the drive shaft (2) is located at both ends of the working roller (1). The surface of the working roller (1) is provided with mounting parts (4). The working roller (1) has a placement groove (6) inside, and a metal hose (10) is installed inside the placement groove (6). The two ends of the metal hose (10) extend to the outside of the working roller (1); The top of the mounting part (4) is provided with an anti-scratch mechanism. The anti-scratch liner (12) of the anti-scratch mechanism is used in conjunction with the water pipe pressure plate (11) connected to the bottom of the anti-scratch liner (12) to protect the working roller (1) from being scratched.

2. The anti-scratching device for hot rolling mill stand production according to claim 1, characterized in that, The anti-scratch mechanism includes bolt holes A (13) on the surface of the anti-scratch liner (12), bolt holes B (5) are equally spaced on the surface of the placement groove (6), bolt holes A (13) and bolt holes B (5) are aligned, water pipe pressure plate (11) is set on the top of the metal hose (10), water pipe pressure plate (11) is located at the bottom of the anti-scratch liner (12), and the anti-scratch liner (12) is detachably connected to the surface of the mounting part (4), the surface of the anti-scratch liner (12) is connected with bolts, and the bolts penetrate through bolt holes A (13) and enter into the bolt holes B (5).

3. The anti-scratching device for hot rolling mill stand production according to claim 2, characterized in that, The working roller (1) has a positioning part (7) located above the placement groove (6) inside, and a water pipe pressure plate (11) is installed on the surface of the positioning part (7). The surface of the water pipe pressure plate (11) has a screw hole A (16), and the surface of the positioning part (7) has screw holes B (8) at equal intervals. The screw holes A (16) and B (8) are aligned, and a screw is connected between the screw holes A (16) and B (8).

4. The anti-scratching device for hot rolling mill stand production according to claim 2, characterized in that, The surface of the metal hose (10) is provided with a water outlet (9), the surface of the water pipe pressure plate (11) is provided with water outlet holes A (17) at equal intervals in the center, and the surface of the anti-scratch liner (12) is provided with water outlet holes B (14) corresponding to the water outlet (9).

5. The anti-scratching device for hot rolling mill stand production according to claim 1, characterized in that, The working roller (1) has mounting grooves (3) at both ends of its surface for placing metal hoses (10).

6. The anti-scratching device for hot rolling mill stand production according to claim 1, characterized in that, The bottom of the water pipe pressure plate (11) is provided with an arc-shaped groove (18) for fixing the metal hose (10).

7. The anti-scratching device for hot rolling mill stand production according to claim 1, characterized in that, The transmission shaft (2) is provided with an anti-rotation fixing block (15) on its side.

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