A guided hinged door arrangement for preventing beveling of a steel sheet
By setting a machining pre-reserved area and transition slope on the main body of the hinged door, and adopting a double-door structure and rotating connecting lugs, the problem of steel plate bevel defects caused by scraping between ultra-wide steel plate blanks and hinged doors was solved, thereby improving the stability and safety of production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING IRON & STEEL CO LTD
- Filing Date
- 2025-04-22
- Publication Date
- 2026-06-09
AI Technical Summary
In the hinged door structure of the steel mill frame roll box, the scraping of the ultra-wide steel plate billet with the hinged door causes the steel plate to form a bevel defect, which affects the production rhythm and increases the risk of failure and downtime.
A guide hinged door device is designed to prevent steel plate bevels. By setting a machining allowance and a transition bevel on the hinged door body, a width margin is provided to avoid the extra-wide steel plate from scratching the hinged door. A double-door structure and a rotating connecting lug to connect the door shaft are adopted to reduce the bevel defects at the end of the steel plate blank.
This effectively prevents ultra-wide steel plate blanks from rubbing against hinged doors, reduces the bevel defects at the ends of steel plate blanks, lowers the risk of downtime due to malfunctions, and maintains a normal production rhythm.
Smart Images
Figure CN224333090U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of guide hinged door technology, and in particular to a guide hinged door device for preventing steel plates from tilting at an angle. Background Technology
[0002] Currently, most steel mill roll boxes use hinged door structures for guidance. In actual production, it has been found that when the mill inlet and outlet opening is set to 2800mm and the rolling width is ≥2710mm, the excessive width caused by poor billet shape can easily lead to the billet rubbing against the hinged door, resulting in a bevel defect at the end of the billet.
[0003] In most cases, steel billets with angled edges can only be recycled, which not only increases the risk of unplanned steel production but also the risk of downtime and disruption to normal production. Therefore, this application improves the hinged door by proposing a guide hinged door device to prevent angled steel plates. Utility Model Content
[0004] To solve the above technical problems, this utility model provides a guide hinged door device to prevent steel plate bevels. After setting the opening degree of the rolling mill inlet and outlet according to the width of the steel plate, it can provide a width margin for extra-wide steel plate billets, and minimize the scraping between extra-wide steel plate billets and the hinged door, thereby reducing the occurrence of bevel defects at the ends of the steel plate billets.
[0005] The guide hinged door device for preventing the steel plate from tilting in this solution includes a hinged door body with a near-steel plate surface close to the steel plate side. The lower area of the near-steel plate surface is machined with a machining reserved area, and a transition slope is provided between the machining reserved area and the unmachined area near the steel plate surface. The hinged door body is also connected to at least one connecting ear, and the connecting ear is rotatably connected to the door hinge.
[0006] The further defined technical solution of this utility model is:
[0007] Furthermore, there are two connecting ears, and the two connecting ears are parallel to each other and are rotatably connected to the door hinge.
[0008] Furthermore, a slot is provided on the side of the hinged door body away from the near-steel plate surface.
[0009] Furthermore, there are two hinged door bodies, which are arranged in a double-leaf configuration with their near-steel plate surfaces facing each other.
[0010] Furthermore, the main body of the hinged door has a thickness of 120mm, and the machining pre-reserved area has a thickness of 70mm.
[0011] The beneficial effects of this utility model are: the guide hinged door device provided by this utility model, through the preset turning reserved area, after setting the opening degree of the rolling mill inlet and outlet according to the width of the steel plate, can provide width margin for extra-wide steel plate blanks, and try to avoid the extra-wide steel plate blanks from rubbing against the hinged door, and reduce the situation of forming bevel defects at the end of the steel plate blank. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the guide hinged door device in a specific embodiment of this utility model;
[0013] Figure 2 This is a side view of the guide hinged door device in a specific embodiment of this utility model;
[0014] Figure 3 This is a side view of the hinged door body in a specific embodiment of the present utility model;
[0015] Figure 4 This is a structural schematic diagram of the guide hinged door device near the steel plate surface in a specific embodiment of this utility model;
[0016] Figure 5 This is a schematic diagram illustrating the application of the guide hinged door device in a specific embodiment of this utility model;
[0017] Among them: 10. Hinged door body; 11. Near steel plate surface; 12. Machining reserved area; 13. Transition slope; 14. Connecting ear; 15. Door hinge; 16. Groove. Detailed Implementation
[0018] like Figure 1 , Figure 2 and Figure 4 As shown, this embodiment provides a guide hinged door device for preventing the angle of a steel plate, including a hinged door body 10 with a steel plate surface 11 near the steel plate. The lower area of the steel plate surface 11 is machined with a machining reserved area 12, and a transition slope 13 is provided between the machining reserved area 12 and the unmachined area of the steel plate surface 11. Two parallel connecting ears 14 are also connected to the hinged door body 10, and both connecting ears 14 are rotatably connected to a door hinge 15.
[0019] See Figure 3 The hinged door body 10 has a slot 16 on the side away from the steel plate surface 11, and the slot 16 is located on the other side, which can reduce the overall weight of the hinged door.
[0020] like Figure 4 The diagram shown is a structural schematic of the guide hinged door device near the steel plate surface 11. (See attached diagram.) Figure 5In the middle, there are two hinged door bodies 10. The two hinged door bodies 10 are set in a double-leaf style and are set opposite each other near the steel plate surface 11. The thickness of the hinged door body 10 is 120mm, and the thickness of the machining reserved area 12 is 70mm.
[0021] It is understandable that the double-leaf guide hinged door device provided by this utility model has a machining reserved area 12 machined in the lower area near the steel plate surface 11. The reserved area 12 is thinner than the unmachined area near the steel plate surface 11 (i.e. above the machining reserved area 12). For example, if the original design of the rolling mill system allows the width of the steel plate billet to pass through to be 2800mm, the design of the machining reserved area 12 allows the width to pass through to be greater than 2800mm. This avoids the scraping of the hinged door by the ultra-wide steel plate billet due to poor billet shape and reduces the occurrence of bevel defects at the end of the steel plate billet.
[0022] In addition to the above embodiments, this utility model may have other implementation methods; all technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.
Claims
1. A guide hinged door device for preventing steel plate angles, comprising a hinged door body (10) having a near-steel plate surface (11) close to the steel plate side, characterized in that, The lower area of the near steel plate surface (11) is machined with a machining reserved area (12), and a transition slope (13) is provided between the machining reserved area (12) and the unmachined area of the near steel plate surface (11). At least one connecting ear (14) is also connected to the hinged door body (10), and the connecting ear (14) is rotatably connected to the door hinge (15).
2. The guide hinged door device according to claim 1, characterized in that, Two connecting ears (14) are provided, and the two connecting ears (14) are parallel to each other and are rotatably connected to the door hinge (15).
3. The guide hinged door device according to claim 1, characterized in that, The hinged door body (10) has a slot (16) on the side away from the near steel plate surface (11).
4. The guide hinged door device according to claim 1, characterized in that, There are two hinged door bodies (10), which are arranged in a double-leaf configuration and are positioned opposite each other near the steel plate surface (11).
5. The guide hinged door device according to claim 1, characterized in that, The hinged door body (10) has a thickness of 120mm, and the machining reserved area (12) has a thickness of 70mm.