A descaling and scale splash prevention device and a hot rolling rough descaling device

Abstract

The present invention provides a descaling and scale splash prevention device and a hot rolling rough descaling device. Among them, the descaling and scale splash prevention device includes a rod shaft, and both ends of the rod shaft are respectively connected to the descaling box body of the hot rolling rough descaling device, so that the rod shaft is located above the descaling roller table of the rough descaling device and at the inlet of the descaling box body; several descaling members, each descaling member having a hanging part and a descaling part provided at at least one end in the length direction of the descaling member; wherein, along the length direction of the rod shaft, several descaling members are sequentially hung on the rod shaft through the hanging parts, so that several descaling members are arranged in a row like a fence to cover the inlet of the descaling box body; the descaling part droops under the action of gravity and rests on the billet on the descaling roller table. The technical solution proposed by the present invention can pre-descale the billet by the self-weight of the descaling member, improve the surface quality of the billet, prevent the scale in the descaling box from splashing out, meet the requirements in the production process, and the equipment structure is simple, which is conducive to popularization.

Description

Technical Field

[0001] The present invention belongs to the technical field of rolling equipment, and particularly relates to a descaling and scale splash prevention device and a hot rolling rough descaling device. Background Art

[0002] In the hot rolling wide strip production line of metallurgical enterprises, during the heating process of steel billets in the heating furnace, scale is extremely likely to be generated on the surface of the steel billets. If the scale is not removed, it will be pressed into the surface of the strip after the steel billets pass through the rolling mill, affecting the surface quality of the strip. Therefore, the rough descaling box is a key descaling device for removing the scale on the surface of steel billets and plays a crucial role in the production process. As Figure 1 shown, the rough descaling box equipment includes a descaling roller table 32, a descaling box body 30, high-pressure nozzles 33, etc. Its working principle: The steel billet 40 after being heated by the heating furnace enters the descaling box body 30 through the descaling roller table 32 before entering the rough rolling mill. During the transportation of the steel billet 40, high-pressure water columns are ejected from the high-pressure nozzles 33 in the descaling box body 30 to break and wash away the scale on the surface of the steel billet 40, ensuring the surface quality of the steel billet 40 before entering the rough rolling mill.

[0003] In the existing rough descaling box, due to high temperature, corrosion, and long-term heavy-duty operation, the box body is severely corroded. Coupled with the accelerated rolling rhythm of the rolling line, the current descaling box has incomplete descaling, which not only severely restricts the daily production of hot-rolled strips but also affects the product quality. At the same time, in the original design of the descaling box, high-pressure spraying during descaling causes scale to splash, and the splashing of scale and high-temperature descaling water can easily cause burns to the surrounding inspection and operating personnel.

[0004] Currently, there is no good solution to solve the problems existing in the steel billet rough descaling box, so as to ensure complete descaling of the steel billet and reduce the occurrence of splash burn accidents at the same time. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0006] In view of this, one object of the present invention is to provide a descaling and scale splash prevention device.

[0007] Another object of the present invention is to provide a hot rolling rough descaling device.

[0008] To achieve the above object, the technical solution of the present invention provides a descaling and scale splash prevention device, including: a rod shaft, both ends of the rod shaft are respectively connected to the descaling box body of the hot rolling rough descaling device, so that the rod shaft is located above the descaling roller table of the rough descaling device and at the inlet of the descaling box body; a plurality of descaling members, each descaling member having a hanging portion and a descaling portion provided at at least one end in the length direction of the descaling member; wherein, along the length direction of the rod shaft, a plurality of descaling members are sequentially hung on the rod shaft through the hanging portions, so that the plurality of descaling members are arranged in a row to form a fence-like shape to cover the inlet of the descaling box body; the descaling portion droops under the action of gravity and rests on the billet on the descaling roller table.

[0009] Further, the hanging portion is a through hole provided on the descaling member for the rod shaft to pass through so that the descaling member is hung on the rod shaft.

[0010] Further, a plurality of hanging plate grooves are provided on the rod shaft, and the hanging plate grooves are annular grooves provided on the outer peripheral surface of the rod shaft along the radial direction of the rod shaft; the through hole includes an oblong hole extending along the length direction of the descaling member and a mounting hole communicating with the oblong hole, the aperture of the mounting hole is larger than the diameter of the rod shaft, the width of the oblong hole is smaller than the diameter of the rod shaft and larger than the diameter of the bottom surface of the hanging plate groove; wherein, the descaling member is hung in the hanging plate groove, and a plurality of hanging plate grooves are evenly distributed on the rod shaft.

[0011] Further, the descaling member is in the shape of a rectangular plate, and at least one end of the descaling member is formed with a pointed descaling portion by the intersection of two inclined sides; the descaling member is inclined and rests on the billet, and along the conveying direction of the billet, the descaling portion is in front of the hanging portion.

[0012] Further, the mounting hole is located at one end in the length direction of the oblong hole, and the descaling portion is provided at one end of the descaling member close to the mounting hole.

[0013] Further, the mounting hole is located at the middle position of the oblong hole, and descaling portions are provided at both ends in the length direction of the descaling member.

[0014] Further, the descaling member includes a connecting plate, a wing plate and a scraping plate, the connecting plate and the scraping plate are respectively connected to both ends of the wing plate, the through hole is provided on the connecting plate, and the descaling portion is provided at one end of the scraping plate far from the wing plate; wherein, the axis of the through hole is parallel to the plate surface of the wing plate.

[0015] Further, the distance between any two adjacent hanging plate grooves is A, and the width of the wing plate is B, wherein, B = A to 2A.

[0016] Further, both ends of the rod shaft have mounting portions for connecting with the descaling box body, and positioning grooves are provided on the mounting portions; the number of rod shafts is at least two, any two rod shafts are arranged in parallel, and a plurality of descaling members are hung on each rod shaft.

[0017] A hot rolling rough descaling device includes: a descaling box, which has a descaling box body and high-pressure nozzles, and the high-pressure nozzles are installed on the descaling box body; a scale breaking and scale splash prevention device, in which a rod shaft is connected to the descaling box body, and along the conveying direction of the billet, the scale breaking and scale splash prevention device is located behind the high-pressure nozzles.

[0018] The beneficial effects brought by the technical solution provided by the embodiment of the present invention are: through the technical solution proposed by the present invention, the scale of the billet can be broken in advance by the self-weight of the descaling part, the surface quality of the billet can be improved, the scale in the descaling box can be prevented from splashing out, the requirements in the production process can be met, the equipment structure is simple, and it is conducive to popularization. Description of the Drawings

[0019] Figure 1 Shows the structural schematic diagram of the hot rolling rough descaling device in the prior art;

[0020] Figure 2 Shows the structural schematic diagram of the hot rolling rough descaling device of an embodiment of the present invention;

[0021] Figure 3 Shows the structural schematic diagram of the scale breaking and scale splash prevention device of an embodiment of the present invention;

[0022] Figure 4 Shows the structural schematic diagram of the descaling part of an embodiment of the present invention;

[0023] Figure 5 Shows the structural schematic diagram of the descaling part of another embodiment of the present invention;

[0024] Figure 6 Shows the structural schematic diagram of the rod shaft of an embodiment of the present invention;

[0025] Figure 7 Shows the partial enlarged structural schematic diagram of the rod shaft of an embodiment of the present invention;

[0026] Figure 8 Shows the structural schematic diagram of the scale breaking and scale splash prevention device of another embodiment of the present invention.

[0027] The symbols in the figure are explained as follows:

[0028] 10 rod shaft, 101 hanging plate groove, 102 installation part, 103 positioning groove, 20 descaling part, 21 connecting plate,

[0029] 22 wing plate, 23 scraper, 201 suspension part, 202 through hole, 2021 oblong hole, 2022 installation hole, 203 descaling part, 30 descaling box body, 32 descaling roller table, 33 high-pressure nozzle, 40 billet. Detailed Embodiments

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention and their beneficial effects will be further described in detail below with reference to the accompanying drawings.

[0031] As Figure 2 and Figure 3 shown, an embodiment of the present invention provides a descaling and scale splash prevention device for a hot rolling rough descaling device.

[0032] The descaling and scale splash prevention device includes: a rod shaft 10 and a plurality of descaling members 20. Generally, the rough descaling box equipment includes equipment such as a descaling roller table 32, a descaling box body 30, and a high-pressure nozzle 33. The descaling roller table 32 is used to convey the steel billet 40 heated in the heating furnace into the descaling box body 30. The high-pressure nozzle 33 provided in the descaling box body 30 breaks and washes away the scale on the surface of the steel billet 40 by spraying a water column to achieve descaling. Both ends of the rod shaft 10 are respectively connected to the descaling box body 30 of the rough descaling device, so that the rod shaft 10 is located above the descaling roller table 32 of the rough descaling device and at the inlet of the descaling box body 30; the descaling member 20 has a hanging portion 201 and a descaling portion 203 provided at at least one end in the length direction of the descaling member 20. The hanging portion 201 is used to hang the descaling member 20 on the rod shaft 10. Since the descaling member 20 is in a hanging state, the descaling member 20 has a certain degree of freedom of movement relative to the rod shaft 10. Therefore, the descaling member 20 freely hangs down under the action of gravity. Among them, a plurality of descaling members 20 are sequentially hung on the rod shaft 10 along the length direction of the rod shaft 10, so that the plurality of descaling members 20 are arranged in a row to cover the inlet of the descaling box body 30 in a fence shape. The descaling portion 203 hangs down on the steel billet 40 on the descaling roller table 32 under the action of gravity. A single descaling member breaks the large-scale scale flakes on the upper surface of the steel billet 40 through the descaling portion 203 by its own weight, descales the steel billet 40 in advance, breaks the large-scale scale on the surface of the steel billet 40, and makes it easier to be washed away by high-pressure water. Then, secondary descaling is performed by a high-pressure water gun provided in the descaling box body 30, so that the descaling of the steel billet 40 is more thorough; in addition, a plurality of descaling members 20 and the rod shaft 10 form a fence-shaped structure at the inlet of the descaling box body 30, which can block the scale and high-temperature descaling water impacted by the high-pressure water gun, prevent the scale and high-temperature descaling water from splashing out at high speed from the inlet, reduce the force when the scale and high-temperature descaling water are ejected, prevent the splashing objects from affecting too far and causing danger to personnel, enhance the safety of the descaling box operation, and have a simple structure, convenient installation and manufacture, and low cost.

[0033] Among them, after the descaling member 20 reduces the force when the scale and descaling water are ejected, the scale and high-temperature descaling water can be discharged through the gaps between the descaling members 20 to ensure the surface quality of the steel billet 40 to be rolled. The descaling portion 20 is set in a triangular shape to break the large-scale scale flakes on the surface of the steel billet through the sharp corners of the descaling portion 20.

[0034] It should be noted that by using the method of hanging a number of descaling members 20 on the rod shaft 10, a plurality of contact points are formed between the descaling parts 203 of the plurality of descaling members 20 and the billet 40. Each descaling member 20 is an independent individual, and each descaling member 20 has the freedom to move independently relative to the rod shaft 10. The use of the descaling and scale splash prevention device is not limited by the thickness and shape of the billet 40, so that the plurality of contact points will never be separated from the contact state. For example, the surface of the billet 40 may be uneven. During the movement of the billet 40, each descaling member 20 can move or rotate relative to the rod shaft 10, causing the height of the descaling part 203 of each descaling member 20 to change continuously. Under the action of gravity, the descaling part 203 of the descaling member 20 droops, while the billet 40 provides a supporting force by contacting the descaling part 203 to prevent the downward displacement of the descaling part 203. Therefore, each descaling member 20 can adapt to the change in the surface shape of the billet 40, so that the descaling part 203 of each descaling member 20 can always slide on the surface of the billet 40, thereby improving the descaling quality.

[0035] In one embodiment, as Figure 3 shown, the hanging part 201 is a through hole 202 provided on the descaling member 20, and the descaling member 20 is hung on the rod shaft 10 by passing the rod shaft 10 through the through hole 202. It can be understood that the aperture of the through hole 202 is larger than the diameter of the rod shaft 10 to ensure that the descaling member 20 can rotate around the rod shaft 10 and the descaling part 203 droops under the action of gravity.

[0036] It can be understood that the hanging part 201 can also be in other forms, such as a hook-shaped structure or even a rope-shaped structure connected to the descaling member 20. Various ways of hanging the descaling member 20 on the rod shaft 10 are within the protection scope of this application.

[0037] Furthermore, as Figure 4 、 Figure 5 and Figure 6As shown in the figure, a plurality of hanging plate grooves 101 are provided on the rod shaft 10. The hanging plate grooves 101 are annular grooves arranged along the radial direction of the rod shaft 10 on the outer peripheral surface of the rod shaft 10. The through hole 202 includes an oblong hole 2021 extending along the length direction of the descaling member 20 and a mounting hole 2022 communicating with the oblong hole 2021. The oblong hole 2021 is used for the radial positioning of the descaling member 20 on the rod shaft 10. The aperture of the mounting hole 2022 is larger than the diameter of the rod shaft 10, so that the rod shaft 10 can pass through the mounting hole 2022 to hang a plurality of descaling members 20 on the rod shaft 10. The width of the oblong hole 2021 is smaller than the diameter of the rod shaft 10 and larger than the diameter of the bottom surface of the hanging plate groove 101, so that the descaling member 20 is hung in the hanging plate groove 101 through the oblong hole 2021. Among them, since the width of the oblong hole 2021 is smaller than the diameter of the rod shaft 10, the hanging plate groove 101 can limit the moving range of the descaling member 20 in the axial direction of the rod shaft 10, and the width of the oblong hole 2021 is larger than the diameter of the bottom surface of the hanging plate groove 101, which enables the descaling member 20 to rotate around the rod shaft 10. The dry hanging plate grooves 101 are evenly distributed on the rod shaft 10, so that a plurality of descaling members 20 are evenly distributed on the rod shaft 10.

[0038] Specific Embodiment 1: As Figure 3 and Figure 4 shown, the descaling member 20 is in the shape of a rectangular plate. The plate surface of the descaling member 20 is used to block the scale and high-temperature descaling water from splashing out at high speed at the inlet of the descaling box body 30. At least one end of the descaling member 20 is formed with a descaling portion 203 with a sharp angle formed by the intersection of two bevel edges for descaling the billet 40. The mounting hole 2022 is located at one end of the oblong hole 2021 in the length direction. After the rod shaft 10 passes through the descaling member 20 through the mounting hole 2022, the descaling member 20 is moved to the position of the hanging plate groove 101 of the rod shaft 10. The descaling member 20 is moved so that the rod shaft 10 abuts against the other end of the oblong hole 2021. The descaling portion 203 is arranged at one end of the descaling member 20 close to the mounting hole 2022, so that the descaling portion 203 can droop under the action of gravity. Both ends of the rod shaft 10 have mounting portions 102 for connecting with the descaling box body 30, and the mounting portions 102 are provided with positioning grooves 103 to realize the installation and positioning of the rod shaft 10.

[0039] In another specific embodiment, as Figure 5 shown, the mounting hole 2022 is located at the middle position of the oblong hole 2021. Descaling portions 203 are arranged at both ends of the descaling member 20 in the length direction. When the descaling portion 203 arranged at one end of the descaling member 20 is severely worn, the descaling member 20 can be reversed and the descaling portion 203 arranged at the other end of the descaling member 20 can be used again for descaling, improving the utilization rate of the descaling member 20 and saving costs.

[0040] In a specific embodiment, as Figure 4As shown, one end of the descaling member 20 is provided with a descaling portion 203, and the other end is provided with two chamfers so that the end of the descaling member 20 is trapezoidal. The chamfering treatment prevents the descaling member 20 from interfering with other components in the box during rotation, reduces the weight of the upper part, and moves the center of gravity of the descaling member 20 downward as much as possible, which is beneficial to the scale-breaking effect of the descaling member 20 and is more convenient for designing angles to distinguish the two ends.

[0041] To further improve the splash-proof effect, the number of rod shafts 10 is at least two, and any two rod shafts 10 are arranged in parallel. A number of descaling members 20 are hung on each rod shaft 10, so that at the inlet of the descaling box body 30, at least two rows of parallel fence-like structures are formed, and the adjacent two rows of descaling members 20 are arranged staggeredly. Therefore, when the scale and high-temperature descaling water splash out of the inlet, they need to pass through at least two rows of descaling members 20, and the force of the scale splashing out is weakened twice, thereby further improving the splash-proof effect.

[0042] Specific Embodiment 2: As Figure 8 shown, the descaling member 20 includes a connecting plate 21, a wing plate 22, and a scraping plate 23. The connecting plate 21 and the scraping plate 23 are respectively connected to both ends of the wing plate 22. A through hole 202 is provided on the connecting plate 21, and the descaling portion 203 is provided at one end of the scraping plate 23 away from the wing plate 22. The axis of the through hole 202 is parallel to the plate surface of the wing plate 22, that is, the plate surface of the wing plate 22 is parallel to the rod shaft 10, so that the plate surface of the wing plate 22 directly faces the inlet of the descaling box body 30 and covers the inlet of the descaling box body 30, realizing the shielding of the scale and high-temperature descaling water and preventing them from splashing out of the inlet of the descaling box body 30 at high speed.

[0043] The distance between any two adjacent hanging plate grooves 101 is A, and the width of the wing plate 22 is B, where B = A to 2A, so that the adjacent two wing plates 22 are in a contact or partially overlapping state, thereby greatly reducing the intensity of the scale and high-temperature descaling water splashing out from the gap between the adjacent two descaling members 20.

[0044] Another embodiment of the present invention provides a hot rolling rough descaling device, including: a descaling box body and the scale-breaking and scale splash-proof device in any of the above embodiments, and the rod shaft in the scale-breaking and scale splash-proof device is connected to the descaling box body.

[0045] Installation method: Install the descaling members 20 one by one into the hanging plate grooves 101 of the rod shaft 10 through the installation holes. After the scale-breaking and scale splash-proof device for the front of the hot rolling rough descaling box is assembled, it is fixed on the descaling box body 30 through the installation methods at both ends of the rod shaft 10.

[0046] It should be noted that after the descaling members 20 are installed, they naturally swing downward and are in a vertical state. After the billet 40 enters, the descaling members 20 can rotate around the rod shaft 10 or slide up and down along the long circular hole 2021 to avoid jamming after the billet 40 enters.

[0047] The beneficial effects of the present invention are as follows: Through the technical solution proposed by the present invention, it is possible to scale the steel billet in advance by the self-weight of the descaling member, improve the surface quality of the steel billet, prevent the scale from splashing out in the descaling box, meet the requirements in the production process, the equipment structure is simple, and it is conducive to popularization.

[0048] In the present invention, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

[0050] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A descaling and scale splash prevention device, which is used for the hot rolling rough descaling device, characterized in that, it includes: a rod shaft, both ends of the rod shaft are respectively connected to the descaling box body of the hot rolling rough descaling device, so that the rod shaft is located above the descaling roller table of the rough descaling device and at the inlet of the descaling box body; a plurality of descaling parts, the descaling parts have hanging parts and descaling parts provided at at least one end in the length direction of the descaling parts; wherein, along the length direction of the rod shaft, a plurality of the descaling parts are sequentially hung on the rod shaft through the hanging parts, so that a plurality of the descaling parts are arranged in a row to form a fence-like shape to cover the inlet of the descaling box body; the descaling part hangs down under the action of gravity and rests on the billet on the descaling roller table; the hanging part is a through hole provided on the descaling part for the rod shaft to pass through so that the descaling part is hung on the rod shaft; a plurality of hanging plate grooves are provided on the rod shaft, and the hanging plate grooves are annular grooves arranged along the radial direction of the rod shaft on the outer peripheral surface of the rod shaft; the through hole includes an oblong hole extending along the length direction of the descaling part and a mounting hole communicated with the oblong hole, the aperture of the mounting hole is larger than the diameter of the rod shaft, the width of the oblong hole is smaller than the diameter of the rod shaft and larger than the diameter of the groove bottom surface of the hanging plate groove; wherein, the descaling part is hung in the hanging plate groove, and a plurality of hanging plate grooves are evenly distributed on the rod shaft; the descaling part is in the shape of a rectangular plate, and a descaling part in the shape of a sharp angle formed by the intersection of two hypotenuses is formed at at least one end of the descaling part; the descaling part is inclined and rests on the billet, and along the conveying direction of the billet, the descaling part is in front of the hanging part; the descaling part includes a connecting plate, a wing plate and a scraping plate, the connecting plate and the scraping plate are respectively connected to both ends of the wing plate, the through hole is provided on the connecting plate, and the descaling part is provided at one end of the scraping plate away from the wing plate; wherein, the axis of the through hole is parallel to the plate surface of the wing plate.

2. The descaling and scale splash prevention device according to claim 1, characterized in that, the mounting hole is located at one end in the length direction of the oblong hole, and the descaling part is provided at one end of the descaling part close to the mounting hole.

3. The descaling and scale splash prevention device according to claim 1, characterized in that, the mounting hole is located at the middle position of the oblong hole, and descaling parts are provided at both ends in the length direction of the descaling part.

4. The descaling and scale splash prevention device according to claim 1, characterized in that, the distance between any two adjacent hanging plate grooves is A, and the width of the wing plate is B, wherein, B = A to 2A.

5. The descaling and scale splash prevention device according to claim 1, characterized in that, both ends of the rod shaft have mounting parts for connecting with the descaling box body, and positioning grooves are provided on the mounting parts; the number of the rod shafts is at least two, any two rod shafts are arranged in parallel, and a plurality of the descaling parts are hung on each rod shaft.

6. A hot rolling rough descaling device, characterized in that, it includes: Descaling box, the descaling box having a dephosphorization box body and high-pressure nozzles, the high-pressure nozzles being mounted on the descaling box body; The descaling and scale splash prevention device according to any one of claims 1 to 5, wherein the rod shaft in the descaling and scale splash prevention device is connected to the descaling box body, and along the conveying direction of the billet, the descaling and scale splash prevention device is located behind the high-pressure nozzles.

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