Flat looper for bar hot rolling

Abstract

The invention relates to the technical field of steel rolling equipment, and particularly discloses a flat looper for hot rolling of bars, which comprises a looper main body, a protective cover device, a movable wheel looping device, two sets of fixed wheel devices, a material supporting wheel device and a steel guide device with a reversible outlet, a light detection signal detection visit hole is formed in the top, a plurality of hollow observation windows are formed in the front side wall and the rear side wall, a movable protection door is movably connected to the front side through a fixing pin, stable forming of large-specification rolled pieces under horizontal arrangement is guaranteed through the synergistic effect of movable wheel sleeving and fixed wheel pressing, and steel running faults and product size fluctuation are effectively reduced. The turnover steel guide device is combined with the rapid maintenance design of the protective cover, the fault processing time is greatly shortened, the continuous operation efficiency of a production line is improved, the service life of key components is prolonged, the maintenance cost is reduced, and reliable hardware support is provided for optimization of the rolling technology through modular anti-loosening and wear-resisting design of the overall structure.

Description

Technical Field

[0001] The invention relates to the technical field of steel rolling equipment, and in particular discloses a flat looper for hot rolling of bars. Background Art

[0002] In the general bar production line, vertical loopers are installed between adjacent frames of the finishing mill to adjust the rolling speed for proper tension control. The rolling hole system adopted is an elliptical-circular hole system, which is arranged alternately horizontally and vertically. When the size of the rolled piece is small, the horizontal and vertical alternating arrangement can be changed to a horizontal arrangement through torsion rolling, so as to reduce the rolling mill replacement time and improve efficiency. However, when the size of the rolled piece is large, the deformation resistance increases, torsion rolling is difficult, and the failure rate is high. Therefore, when the elliptical hole type is a vertical ellipse, the vertical looper cannot be used, resulting in a high steel running failure rate after replacing the finished product rolls, and manual adjustment of the tension is required close to the red steel. Not only is the adjustment accuracy poor, resulting in large deviations in the size of the finished steel bars, but also high operational safety risks. Summary of the Invention

[0003] The present invention proposes a flat looper for hot rolling of bars, which ensures the stable forming of large-sized rolled pieces in a horizontal arrangement through the coordinated effect of the moving wheel lifting and the fixed wheel pressing, effectively reducing steel leakage failures and product size fluctuations.

[0004] The present invention is achieved by providing a flat looper for hot rolling of bars, comprising:

[0005] Looper body, protective cover device, moving wheel lifting device, two sets of fixed wheel devices, supporting wheel device and outlet reversible guide steel device;

[0006] The protective cover device is made of welded steel plates and has an open bottom end, a light detection signal detection hole on the top, multiple hollow observation windows on the front and rear side walls, and a movable protective door movably connected to the front through a fixed pin;

[0007] The moving wheel lifting device is installed on the inlet side of the looper body, and includes a crank arm pin and a cylinder. One end of the crank arm pin is fixedly connected to the base of the looper body, and the other end of the crank arm pin is rotatably connected to the crank arm. One end of the cylinder is rotatably connected to the base through the cylinder fixed pin, and the other end is rotatably connected to the crank arm. The other end of the crank arm is rotatably connected to the moving wheel through the moving wheel shaft. The moving wheel passes through the moving wheel shaft and is locked by the moving wheel shaft fixing pin. A crank arm pin pressure cover is provided at the end of the crank arm pin away from the crank arm.

[0008] The fixed wheel device is provided with two sets and is symmetrically arranged on both sides of the red steel running path of the looper body. The fixed wheel device includes a fixed wheel shaft and a fixed wheel rotatably connected to the outer wall of the fixed wheel shaft;

[0009] The supporting wheel device includes a supporting wheel shaft and a supporting wheel rotatably connected to the outer wall of the supporting wheel shaft, and the supporting wheel device is installed in a slot on the bottom plate of the looper body;

[0010] The outlet reversible steel guide device comprises an outlet steel guide box, a rotating pin shaft and a fixed pin shaft, and the outlet steel guide box body can be reversed around the rotating pin shaft.

[0011] As a preferred flat looper for hot rolling of bars of the present invention, the outer wall of the moving wheel is provided with an anti-loosening washer and a first anti-loosening nut, and the outer side between the fixed wheel shaft and the fixed wheel is provided with a second anti-loosening nut.

[0012] As a preferred flat looper for hot rolling of bars according to the present invention, a copper sleeve is sleeved on the inner side of the connection between the crank arm pin and the crank arm.

[0013] As a preferred embodiment of the flat looper for hot rolling of bars of the present invention, a third anti-loosening nut is provided on the outer side between the supporting wheel and the supporting wheel shaft.

[0014] As a preferred embodiment of the flat looper for hot rolling of bars according to the present invention, the inner wall of the outlet steel guide box is a wear-resistant alloy liner.

[0015] As a preferred embodiment of the flat looper for hot rolling of bars of the present invention, the surfaces of the moving wheel, the fixed wheel and the supporting wheel are sprayed with a tungsten carbide wear-resistant coating.

[0016] The beneficial effects of the present invention are:

[0017] This invention achieves automated tension control during the hot-rolling process of bars, replacing the high-risk manual handling of hot steel and significantly improving operational safety. The synergistic effect of the moving wheel sheathing and the fixed wheel holding system ensures stable forming of large-sized rolled products in a horizontal arrangement, effectively reducing steel slippage and product dimensional fluctuations. The reversible steel guide combined with the quick-access design of the protective cover significantly shortens troubleshooting time and improves the continuous operation efficiency of the production line. The overall structure's modular anti-loosening and wear-resistant design extends the life of key components, reduces maintenance costs, and provides reliable hardware support for rolling process optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0019] Figure 1 It is the overall structural diagram of the present invention;

[0020] Figure 2This is a structural diagram of the protective cover device of the present invention;

[0021] Figure 3 This is a structural diagram of the driving wheel lifting device of the present invention;

[0022] Figure 4 This is a structural diagram of the fixed wheel device of the present invention;

[0023] Figure 5 This is a structural diagram of the supporting wheel device of the present invention;

[0024] Figure 6 This is a structural diagram of the outlet reversible steel guide device of the present invention.

[0025] Markings in the figure: 1. Optical signal detection viewing hole; 2. Hollow observation window; 3. Fixing pin; 4. Movable protective door; 5. Moving wheel; 6. Moving wheel shaft; 7. Moving wheel shaft fixing pin; 8. Crank arm; 9. Cylinder fixing pin; 10. Cylinder; 11. Anti-loosening washer; 12. First anti-loosening nut; 13. Rotating pin; 14. Crank arm pin pressure cover; 15. Crank arm pin; 16. Copper sleeve; 17. Fixed wheel; 18. Fixed wheel shaft; 19. Second anti-loosening nut; 20. Fixing pin; 21. Supporting wheel; 22. Supporting wheel shaft; 23. Third anti-loosening nut; 24. Export guide steel box. DETAILED DESCRIPTION

[0026] The present invention is further described below with reference to the accompanying drawings and specific examples to facilitate understanding of the present invention. The methods used in the present invention are conventional methods unless otherwise specified; the raw materials and devices used are conventional commercially available products unless otherwise specified.

[0027] See also Figure 1-6 , a flat looper for hot rolling of bars, comprising:

[0028] Looper body, protective cover device, moving wheel lifting device, two sets of fixed wheel devices, supporting wheel device and outlet reversible guide steel device;

[0029] The protective cover device is made of welded steel plates with an open bottom end, a light detection signal detection hole 1 on the top, multiple hollow observation windows 2 on the front and rear side walls, and a movable protective door 4 movably connected to the front through a fixed pin 3;

[0030] The driving wheel lifting device is installed on the inlet side of the loop mill body, and comprises a curved arm pin shaft 15 and a cylinder 10, one end of the curved arm pin shaft 15 is fixedly connected to the base of the loop mill body, the other end of the curved arm pin shaft 15 is rotatably connected with a curved arm 8, one end of the cylinder 10 is rotatably connected with the base through a cylinder fixing pin shaft 9, the other end of the cylinder 10 is rotatably connected with the curved arm 8, the other end of the curved arm 8 is rotatably connected with a driving wheel 5 through a driving wheel shaft 6, the driving wheel 5 penetrates through the driving wheel shaft 6 and is locked by a driving wheel shaft fixing pin 7, and the end of the curved arm pin shaft 15, which is away from the curved arm 8, is provided with a curved arm pin shaft pressing cover 14.

[0031] The fixed wheel device is provided with two sets and is symmetrically arranged on both sides of the red steel running path of the loop mill body, and comprises a fixed wheel shaft 18 and a fixed wheel 17 rotatably connected to the outer wall of the fixed wheel shaft 18.

[0032] The material supporting wheel device comprises a material supporting wheel shaft 22 and a material supporting wheel 21 rotatably connected to the outer wall of the material supporting wheel shaft 22, and is installed in the clamping groove of the bottom plate of the loop mill body.

[0033] The outlet reversible guide device comprises an outlet guide box 24, a rotating pin shaft 13 and a fixing pin shaft 20, and the outlet guide box 24 can be reversed around the rotating pin shaft 13.

[0034] In the embodiment, when the red steel enters the loop mill body, the cylinder 10 pushes the curved arm 8 to rotate around the curved arm pin shaft 15, drives the driving wheel 5 to rise through the driving wheel shaft 6, and makes the red steel form a stable arc loop; the light detection signal detection viewing hole 1 of the protective cover device monitors the loop amount in real time, the hollow observation window 2 is convenient for observing the state of the red steel, the movable protective door 4 is quickly opened and closed through the fixing pin 3 to ensure safety; the two sets of fixed wheel devices apply a pressing force to the red steel through the fixed wheel 17, and cooperate with the material supporting wheel 21 to reduce the friction between the red steel and the bottom plate; the outlet guide box 24 reverses and adjusts the angle through the rotating pin shaft 13, guides the red steel to accurately enter the next rack, realizes automatic tension control, eliminates the risk of manual intervention, improves the size stability of the product, realizes the automatic tension control of the bar hot rolling process, replaces the high-risk operation of manual contact with the red steel, significantly improves the operation safety, through the synergistic effect of the driving wheel 5 lifting and the fixed wheel 17 pressing, the stable forming of large-scale rolled pieces under horizontal arrangement is ensured, the red steel running fault and the product size fluctuation are effectively reduced. The reversible guide device combined with the quick maintenance design of the protective cover greatly shortens the fault processing time, improves the continuous operation efficiency of the production line, the overall structure is designed through modular anti-loose and wear-resistant design, prolongs the service life of the key components, reduces the maintenance cost, and provides reliable hardware support for the rolling process optimization.

[0035] As a technical optimization scheme of the present application, the outer wall of the driving wheel 5 is provided with an anti-loose washer 11 and a first anti-loose nut 12, and the outer side between the fixed wheel shaft 18 and the fixed wheel 17 is provided with a second anti-loose nut 19.

[0036] In this embodiment, the first anti-loosening nut 12 prevents the moving wheel 5 from vibrating and deviating, and the second anti-loosening nut 19 locks the fixed wheel shaft 18 to ensure that the holding force of the fixed wheel 17 is stable and reduce steel running failure.

[0037] As a technical optimization solution of the present invention, a copper sleeve 16 is sleeved on the inner side of the connection between the crank arm pin 15 and the crank arm 8.

[0038] In this embodiment, the copper sleeve 16 reduces the friction loss between the crank arm pin 15 and the crank arm 8, thereby extending the service life of the crank arm mechanism.

[0039] As a technical optimization solution of the present invention, a third anti-loosening nut 23 is provided on the outer side between the supporting wheel 21 and the supporting wheel shaft 22 .

[0040] In this embodiment, the third anti-loosening nut 23 fixes the supporting wheel shaft 22 to prevent the supporting wheel 21 from tilting due to vibration, thereby maintaining the smooth transmission of red steel.

[0041] As a technical optimization solution of the present invention, the inner wall of the outlet guide steel box 24 is a wear-resistant alloy lining.

[0042] In this embodiment, the wear-resistant alloy lining plate on the inner wall of the outlet guide steel box 24 resists high-temperature erosion of red steel, thereby extending the service life of the guide device.

[0043] As a technical optimization solution of the present invention, the surfaces of the moving wheel 5, the fixed wheel 17 and the supporting wheel 21 are sprayed with a tungsten carbide wear-resistant coating.

[0044] In this embodiment, the tungsten carbide coating on the surfaces of the moving wheel 5, the fixed wheel 17, and the supporting wheel 21 enhances wear resistance and reduces wear and deformation caused by high-temperature red steel.

[0045] The working principle and usage process of the present invention are as follows: red steel enters the main body of the looper from the entrance, and the cylinder 10 drives the crank arm 8 to rotate around the crank arm pin 15 through the cylinder fixed pin 9, and the moving wheel shaft 6 at the end of the crank arm 8 drives the moving wheel 5 to rise and support the red steel to form an arc-shaped storage sleeve; the fixed wheels 17 on both sides of the red steel apply a downward force through the fixed wheel shaft 18 to stabilize the path, and the supporting wheel 21 supports the red steel through the supporting wheel shaft 22 to reduce friction; the optical detection signal detection viewing hole 1 monitors the sleeve amount and controls the lifting amount of the cylinder 10; the red steel is guided into the next frame through the outlet guide steel box 27, and the outlet guide steel box 24 can be flipped around the rotating pin 13 for quick maintenance; the hollow observation window 2 of the protective cover device assists in manual monitoring, and the movable protective door 4 can intervene in abnormal conditions in an emergency through the fixed pin 3.

[0046] In the description of the present application, it should be understood that the terms "left", "right", "upper", "lower", "top", "bottom", "front", "back", "inner", "outer", "back", "middle" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0047] The above is only a specific embodiment of the present application, and cannot limit the scope of the present application. Therefore, the replacement of equivalent components or equivalent changes and modifications made within the scope of the patent protection of the present application shall still fall within the scope of the claims of the present application.

Claims

1. A flat looper for hot rolling of bars, characterized by: include: Looper body, protective cover device, moving wheel lifting device, two sets of fixed wheel devices, supporting wheel device and outlet reversible guide steel device; The protective cover device is formed by welding steel plates and has an open bottom end, a light detection signal detection hole (1) is provided on the top, a plurality of hollow observation windows (2) are provided on the front and rear side walls, and a movable protective door (4) is movably connected to the front through a fixing pin (3); The moving wheel lifting device is installed on the inlet side of the looper body, and includes a crank arm pin (15) and a cylinder (10). One end of the crank arm pin (15) is fixedly connected to the base of the looper body, and the other end of the crank arm pin (15) is rotatably connected to the crank arm (8). One end of the cylinder (10) is rotatably connected to the base through the cylinder fixed pin (9), and the other end is rotatably connected to the crank arm (8). The other end of the crank arm (8) is rotatably connected to the moving wheel (5) through the moving wheel shaft (6). The moving wheel (5) passes through the moving wheel shaft (6) and is locked by the moving wheel shaft fixed pin (7). The end of the crank arm pin (15) away from the crank arm (8) is provided with a crank arm pin cover (14); The fixed wheel device is provided with two sets and is symmetrically arranged on both sides of the red steel running path of the looper body. The fixed wheel device includes a fixed wheel shaft (18) and a fixed wheel (17) rotatably connected to the outer wall of the fixed wheel shaft (18); The supporting wheel device comprises a supporting wheel shaft (22) and a supporting wheel (21) rotatably connected to the outer wall of the supporting wheel shaft (22), and the supporting wheel device is installed in a slot on the bottom plate of the looper body; The outlet reversible steel guide device comprises an outlet steel guide box (24), a rotating pin (13) and a fixed pin (20), and the outlet steel guide box (24) can be reversed around the rotating pin (13).

2. A flat looper for hot rolling of bars according to claim 1, characterized in that: An anti-loosening washer (11) and a first anti-loosening nut (12) are provided on the outer wall of the moving wheel (5), and a second anti-loosening nut (19) is provided on the outer side between the fixed wheel shaft (18) and the fixed wheel (17).

3. The flat looper for hot rolling of bars according to claim 1, characterized in that: A copper sleeve (16) is sleeved on the inner side of the connection between the crank arm pin (15) and the crank arm (8).

4. The flat looper for hot rolling of bars according to claim 1, characterized in that: A third anti-loosening nut (23) is provided on the outer side between the supporting wheel (21) and the supporting wheel shaft (22).

5. The flat looper for hot rolling of bars according to claim 1, characterized in that: The inner wall of the outlet guide steel box (24) is a wear-resistant alloy lining.

6. The flat looper for hot rolling of bars according to claim 1, characterized in that: The surfaces of the moving wheel (5), the fixed wheel (17) and the supporting wheel (21) are all sprayed with a tungsten carbide wear-resistant coating.

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