Roller preheating device
By designing a movable roll preheating device, and using structures such as electric heating plates and casters, the problems of large footprint, uneven heating, and poor compatibility of roll preheating equipment have been solved. This has enabled flexible movement and uniform heating of the rolls, improving rolling accuracy and roll service life.
Patent Information
- Application Number
- CN202520341065.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Existing roll preheating equipment occupies a large area, is fixed in place, has uneven heating, and poor compatibility, which affects rolling quality and efficiency.
A movable and retractable roll preheating device was designed. It uses an electric heating plate for heating and combines universal wheels, lifting and clamping mechanisms to achieve flexible movement of the roll, uniform heating and adaptability to rolls of different specifications.
It improves the convenience and stability of roll preheating, ensures heating uniformity, enhances the applicability and automation of the equipment, and improves rolling accuracy and roll service life.
Smart Images
Figure CN223833112U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rolling mill processing technology, specifically relating to a rolling mill preheating device. Background Technology
[0002] Rolls are one of the core components of rolling mills, widely used in metallurgy, machining, and other industries. Their performance directly affects the quality of rolled products and production efficiency. During the rolling process, rolls operate in a harsh environment, enduring high temperatures, high pressures, and frictional wear for extended periods. To improve roll lifespan and optimize rolling results, preheating treatment is typically required to reduce temperature stress and enhance processing stability.
[0003] Currently, preheating of rolls typically employs independent heating equipment, such as heating furnaces or electric heating plates. While these methods achieve the preheating purpose, they present several problems: First, traditional preheating equipment is usually fixed in place, occupying a large area and hindering flexible adjustments on the production site. Second, some heating methods suffer from uneven heating, leading to localized overheating or uneven temperature gradients during the roll heating process, thus affecting subsequent rolling quality. Furthermore, rolls require stable fixing and rotation devices during preheating to ensure uniform heating; however, current technologies offer limited options for roll fixing and rotation, making it difficult to accommodate rolls of different specifications and limiting the applicability. Utility Model Content
[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a roll preheating device that is movable, heats evenly, and is compatible with rolls of different specifications, so as to improve the convenience and effect of roll preheating, optimize the stability of rolls during the heating process, reduce manual intervention, and improve production efficiency.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A roll preheating device includes a frame with a U-shaped top. A lower cover is fixedly installed on the top of the frame. An upper cover is installed on one side of the lower cover via a hinge. A connecting frame is fixedly installed on one side of the frame. An electric heating plate for preheating the roll is fixedly installed on the inner wall of the top of the upper cover. The frame is equipped with casters at the four corners of its bottom for easy movement.
[0007] The frame is equipped with a storage mechanism for storing the casters after the frame has been moved;
[0008] The lower cover is provided with a lifting mechanism for supporting the rolls;
[0009] The lower cover is provided with a clamping mechanism for clamping the rolls;
[0010] The connecting frame is equipped with a pulling mechanism for opening or closing the top cover.
[0011] Furthermore, the storage mechanism includes a third motor, a threaded rod, and a lifting plate. The bottom of the third motor is fixedly connected to the inner wall of the bottom of the frame. A groove is provided at the bottom of the frame. The top of the threaded rod is rotatably connected to the inner wall of the top of the groove. The outer side of the lifting plate is slidably connected to the inner wall of the groove. A threaded hole is provided at the top of the lifting plate. The threaded rod is threadedly connected to the threaded hole. The tops of the four casters are fixedly connected to the four corners of the bottom of the lifting plate. The output end of the third motor passes through the bottom of the frame and is fixedly connected to the top of the threaded rod.
[0012] Furthermore, the lifting mechanism includes a bracket, two arc-shaped plates, and a second hydraulic cylinder. The bracket is U-shaped, and the bottoms of the two arc-shaped plates are welded to the tops of both ends of the bracket. The bracket is located inside the lower cover. The bottom of the second hydraulic cylinder is fixedly connected to the inner wall of the bottom of the frame. The telescopic part of the second hydraulic cylinder passes through the bottom of the lower cover and is fixedly connected to the bottom of the bracket. The two arc-shaped plates are rotatably equipped with the same rotating rod on their adjacent sides, and there are multiple rotating rods.
[0013] Furthermore, the clamping mechanism includes a first hydraulic cylinder, a first clamping plate, and a second clamping plate. One end of the first hydraulic cylinder is fixedly connected to one side of the lower cover. The telescopic part of the first hydraulic cylinder passes through one side of the lower cover and is fixedly provided with a rotating seat. The first clamping plate is rotatably mounted on the rotating seat. One side of the second clamping plate is rotatably connected to one side of the inner wall of the lower cover.
[0014] Furthermore, the pulling mechanism includes a frame, a first motor, a winding wheel, a pull rope, and a bracket. The top of the frame is fixedly connected to the inner top wall of the connecting frame. One side of the first motor is fixedly connected to one side of the frame. The output end of the first motor passes through one side of the frame and is fixedly connected to one side of the winding wheel. The top of the bracket is fixedly connected to the inner top wall of the connecting frame. The same roller is rotatably connected to the inner walls of both sides of the bracket. The pull rope is in contact with the roller. One end of the pull rope is fixedly connected to one side of the winding wheel, and the other end is fixedly connected to one side of the top cover.
[0015] Furthermore, a second motor for rotating the roll in the clamping state is fixedly installed on one side of the lower cover, and the output end of the second motor passes through one side of the lower cover and is fixedly connected to one side of the second clamping plate.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] This invention provides a roll preheating device. Compared with the prior art, this device has advantages such as mobility, strong heating uniformity, high compatibility and convenient operation. It effectively solves the problems of large footprint, fixed installation, uneven heating and poor compatibility of existing roll preheating equipment, and improves the stability and efficiency of roll preheating.
[0018] This invention, by incorporating casters and a storage mechanism, allows the device to move freely and adapt to different production environments. By installing four casters at the bottom of the frame, the device can be flexibly moved to the location where preheating of the rolls is required, improving the ease of use. During preheating, a third motor drives the threaded rod to rotate, causing the lifting plate to rise and retract the casters into the frame, ensuring full contact between the bottom of the frame and the ground, improving the stability of the device and preventing uneven heating caused by equipment shaking during roll rotation.
[0019] This invention uses an electric heating plate as the heating element, improving heating uniformity and efficiency. The electric heating plate is fixedly installed on the inner wall of the upper cover and employs a carbon fiber heating element, capable of providing uniform heat in a short time. In conjunction with a second motor, it causes the rolls to rotate slowly during heating, ensuring uniform heating of the roll surface and avoiding localized overheating or uneven temperature gradients. Compared to traditional fixed heating furnaces or localized heating methods, this device effectively reduces temperature stress, improving roll life and rolling accuracy.
[0020] This invention improves the adaptability of the device to rolls of different specifications through a lifting mechanism and a clamping mechanism. The lifting mechanism drives the bracket and arc plate through a second hydraulic cylinder, enabling the rolls to adapt to different diameter ranges and ensuring stable placement of the rolls; the clamping mechanism drives the clamping plate through a first hydraulic cylinder to clamp the rolls, keeping them stable during rotational preheating, while also being compatible with rolls of different diameters and lengths, thus expanding the applicability of the device.
[0021] This invention improves the automation level of the equipment by using an electric control method for the pulling mechanism. The pulling mechanism uses a first motor to drive the winding wheel, and the opening and closing operation of the top cover is achieved by pulling a rope, reducing manual intervention and improving work efficiency. In addition, all motors and hydraulic cylinders of the device can be precisely controlled by an external controller, which can adjust the clamping force, rotation speed and heating temperature of the rollers according to actual needs, ensuring that the preheating process is safe and controllable, and improving production efficiency.
[0022] In summary, this utility model, through structural optimization, improves the stability and uniformity of roll preheating, enhances the applicability of the equipment, and improves the convenience and automation level of operation. It can meet the roll preheating requirements under different working conditions, improves the preheating quality and service life of the rolls, and has high practical value and promotion significance. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0024] Figure 2 This is a side view of the structure of this utility model;
[0025] Figure 3 This is a schematic diagram of the internal structure of the lower cover of this utility model;
[0026] Figure 4 This is a schematic diagram of the internal structure of the frame of this utility model.
[0027] The attached diagram lists the components represented by each number as follows:
[0028] 1. Frame; 2. Lower cover; 3. Upper cover; 4. Clamping mechanism; 41. Hydraulic cylinder; 42. First clamping plate; 43. Second clamping plate; 5. Connecting frame; 6. Pulling mechanism; 61. Frame body; 62. First motor; 63. Frame body; 64. Pull rope; 7. Second motor; 8. Lifting mechanism; 81. Arc plate; 82. Rotating rod; 83. Bracket; 9. Storage mechanism; 91. Lifting plate; 92. Third motor; 93. Threaded rod; 94. Groove. Detailed Implementation
[0029] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.
[0030] like Figure 1-4 As shown, a roll preheating device includes a frame 1 with a U-shaped top. The frame 1 is made of Q235 carbon steel to ensure structural strength and stability. A lower cover 2 is fixedly installed on the top of the frame 1. The lower cover 2 is made of high-temperature resistant alloy steel to adapt to high-temperature preheating environments and improve durability. An upper cover 3 is installed on one side of the lower cover 2 via a stainless steel hinge. An electric heating plate for preheating the roll is fixedly installed on the inner wall of the top of the upper cover 3. The electric heating plate uses carbon fiber heating elements, operates at 220V, and has a power range of 2-5kW to ensure uniform heating of the roll during the heating process. A connecting frame 5 is fixedly installed on one side of the frame 1. The connecting frame 5 is welded from a 5mm thick steel plate to ensure sufficient mechanical strength and support the operation of the pulling mechanism 6. The four corners of the bottom of the frame 1 are equipped with casters for easy movement. The casters are made of high-load-bearing nylon material, with a single wheel bearing capacity of up to 300kg, and have anti-slip and wear-resistant properties, so that the device can move smoothly and adapt to different production environments.
[0031] The frame 1 is equipped with a storage mechanism 9 for storing the casters after the frame 1 is moved. The storage mechanism 9 can effectively reduce the instability caused by the tires contacting the ground during the heating process, improve the overall stability of the equipment, and prevent the equipment from shifting due to vibration or uneven force. The lower cover 2 is equipped with a lifting mechanism 8 for supporting the rolls. The lifting mechanism 8 is suitable for rolls of different diameters, with a maximum applicable diameter of 600mm, ensuring that the rolls can be stably supported and heated evenly. The lower cover 2 is equipped with a clamping mechanism 4 for clamping the rolls. The clamping mechanism 4 can adapt to rolls of different sizes and is hydraulically driven for clamping. The clamping force is adjustable from 500N to 5000N to meet different processing requirements. The connecting frame 5 is equipped with a pulling mechanism 6 for opening or closing the upper cover 3. The pulling mechanism 6 is driven by a motor and can automatically control the opening and closing of the upper cover 3, reducing manual intervention and improving work efficiency.
[0032] like Figure 4 As shown, the storage mechanism 9 includes a third motor 92, a threaded rod 93, and a lifting plate 91. The third motor 92 is a stepper motor, model 57BYG250, with a rated power of 200W, capable of high-precision lifting control. The bottom of the third motor 92 is fixedly connected to the bottom inner wall of the frame 1 to ensure stability. The bottom of the frame 1 has a groove 94 with a depth of 30mm to ensure that the casters are fully embedded and stored, avoiding external interference. The top of the threaded rod 93 is rotatably connected to the top inner wall of the groove 94. The threaded rod 93 is made of high-strength alloy steel with a pitch of 2mm to ensure lifting stability. The outer side of the lifting plate 91 is slidably connected to the inner wall of the groove 94. A threaded hole is opened at the top of the lifting plate 91, and the threaded hole is threadedly connected to the threaded rod 93. The threaded rod 93 is rotated by the third motor 92, so that the lifting plate 91 can be accurately raised and lowered in the vertical direction. The tops of the four universal wheels are fixedly connected to the four bottom corners of the lifting plate 91. When the lifting plate 91 is raised, the universal wheels are lifted off the ground and stored inside the frame 1, so that the bottom of the frame 1 is completely in contact with the ground, improving the stability of the device during operation. The output end of the third motor 92 passes through the bottom of the frame 1 and is fixedly connected to the top of the threaded rod 93 to ensure accurate and reliable drive transmission.
[0033] like Figure 3As shown, the lifting mechanism 8 includes a bracket 83, two arc-shaped plates 81, and a second hydraulic cylinder. The bracket 83 is U-shaped, made of Q235B steel with a thickness of 6mm to ensure load-bearing capacity. The tops of both ends of the bracket 83 are welded to the bottoms of the two arc-shaped plates 81 respectively. The welding method is CO2 gas shielded welding to improve structural strength and reduce stress concentration. The bracket 83 is located inside the lower cover 2. The bottom of the second hydraulic cylinder is fixedly connected to the bottom inner wall of the frame 1. The telescopic part of the second hydraulic cylinder passes through the bottom of the lower cover 2 and is fixedly connected to the bottom of the bracket 83. The hydraulic cylinder is a φ50×250mm hydraulic cylinder with a rated working pressure of 10MPa to ensure the stability and reliability of the lifting device. The same rotating rod 82 is rotatably set on the side of the two arc-shaped plates 81 that are close to each other. There are multiple rotating rods 82, made of GCr15 bearing steel, with the outer surface hardened to improve wear resistance and load-bearing capacity, ensuring stability and reducing friction when the roll rotates.
[0034] like Figure 1 and Figure 3 As shown, the clamping mechanism 4 includes a first hydraulic cylinder 41, a first clamping plate 42, and a second clamping plate 43. One end of the first hydraulic cylinder 41 is fixedly connected to one side of the lower cover 2. The first hydraulic cylinder 41 is a double-acting hydraulic cylinder with a specification of φ63×200mm and a rated pressure of 12MPa to ensure the reliability of the clamping force. The telescopic part of the first hydraulic cylinder 41 passes through one side of the lower cover 2 and is fixedly provided with a rotating seat. The rotating seat is made of ductile iron to improve wear resistance and stability. The first clamping plate 42 is rotatably mounted on the rotating seat. Both the first clamping plate 42 and the second clamping plate 43 are made of high-strength heat-resistant alloy steel and are chrome-plated to improve corrosion resistance and wear resistance. One side of the second clamping plate 43 is rotatably connected to the inner wall of one side of the lower cover 2. The clamping operation of the roll is completed by the telescopic movement of the hydraulic cylinder, and the clamping is stable and reliable.
[0035] like Figure 1 and Figure 2As shown, the pulling mechanism 6 includes a frame 61, a first motor 62, a winding reel, a pull rope 64, and a frame 63. The top of the frame 61 is fixedly connected to the inner top wall of the connecting frame 5. The frame 61 is made of aluminum alloy to reduce the overall weight. One side of the first motor 62 is fixedly connected to one side of the frame 61. The first motor 62 is a stepper motor, model 42BYGHM809, with a rated voltage of 24V, ensuring precise control of the pulling mechanism. The output end of the first motor 62 passes through one side of the frame 61 and is fixedly connected to one side of the winding reel. The winding reel is made of nylon and has a diameter of [missing information]. The diameter is 80mm to ensure smooth winding and unwinding of the pull rope 64; the top of the frame 63 is fixedly connected to the inner top wall of the connecting frame 5, and the inner walls on both sides of the frame 63 are rotatably connected to the same roller. The roller is made of wear-resistant rubber material to reduce friction; the pull rope 64 is in contact with the roller. The pull rope 64 is made of Kevlar high-strength fiber material, which has high tensile strength and high temperature resistance to ensure stable performance even after long-term use; one end of the pull rope 64 is fixedly connected to one side of the winding wheel, and the other end is fixedly connected to one side of the top cover 3. The automatic opening and closing of the top cover 3 is achieved by driving the first motor 62.
[0036] like Figure 2 As shown, a second motor 7 for rotating the roll in the clamping state is fixedly installed on one side of the lower cover 2. The second motor 7 is a brushless DC motor, model BLDC-750W-24V, with a rated power of 750W, to ensure that the roll can rotate slowly and evenly to ensure the preheating effect. The output end of the second motor 7 passes through one side of the lower cover 2 and is fixedly connected to one side of the second clamping plate 43 to ensure stable power transmission.
[0037] like Figure 4 As shown, the inner walls on both sides of the groove 94 are provided with limiting grooves to limit the lifting plate 91 and prevent it from falling off the frame 1. The limiting grooves are 10mm wide and 15mm deep. Limiting blocks are fixedly installed on both sides of the lifting plate 91. The limiting blocks are made of Q235 steel to ensure that there is no deviation or loosening during the lifting process.
[0038] The working principle of this utility model is as follows: When in use, the entire device is moved to the required position by the casters. After being moved to the appropriate position, the third motor 92 is started. The output end of the third motor 92 rotates, which drives the rotation of the threaded rod 93. The threaded rod 93 rotates in the threaded hole (the threaded hole has a certain depth), which causes the lifting plate 91 to rise and the frame 1 to fall. When the casters are retracted into the frame 1, the bottom of the frame 1 contacts the ground.
[0039] Then, open the top cover 3, start the first motor 62, and the output end of the first motor 62 drives the take-up wheel to rotate, pulling the pull rope 64, causing the top cover 3 to rotate and open around the hinge. Place the roll on multiple rotating rods 82, start the second hydraulic cylinder, extend the telescopic part, push the bracket 83, the arc plate 81, and the roll to rise, lift it to a suitable height, and align the two ends of the roll with the center position of the first clamping plate 42 and the second clamping plate 43. Start the first hydraulic cylinder 41, and the telescopic part of the first hydraulic cylinder 41 extends and retracts, clamping the roll through the first clamping plate 42 and the second clamping plate 43 (it can clamp rolls of different sizes). After clamping, the telescopic part of the second hydraulic cylinder retracts, returning the bracket 83, the arc plate 81, and other components to their initial positions. Of course, they can also not return to their initial positions, but it must be ensured that the two ends of the roll are located at the center of the first clamping plate 42 and the second clamping plate 43. When the roll rotates, the rotating rods 82 will... Simultaneously, the rotation begins, followed by the activation of the first motor 62, which drives the take-up reel to rotate, releasing the pull rope 64 and causing the upper cover 3 to rotate around the hinge and close. Simultaneously, the electric heating plate and the second motor 7 are activated. The electric heating plate preheats the rolls, and the output of the second motor 7 rotates, driving the second clamping plate 43 to slowly rotate the rolls, ensuring uniform heating. After preheating, the power is turned off, and the rolls can be removed. The first motor 62, second motor 7, and third motor 92 can be stepper motors, which can rotate in both directions. The first motor 62, second motor 7, third motor 92, first hydraulic cylinder 41, second hydraulic cylinder, and electric heating plate require an external controller for operation. Power can be supplied by a battery installed on the frame 1. It should be noted that the first hydraulic cylinder 41 and second hydraulic cylinder require connection to an external hydraulic pump station for operation.
[0040] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.
Claims
1. A roll preheating device, comprising a frame (1), characterized in that: The top of the frame (1) is U-shaped. A lower cover (2) is fixedly installed on the top of the frame (1). An upper cover (3) is installed on one side of the lower cover (2) via a hinge. A connecting frame (5) is fixedly installed on one side of the frame (1). An electric heating plate for preheating the rolls is fixedly installed on the inner wall of the top of the upper cover (3). Universal wheels for easy movement are provided at the four corners of the bottom of the frame (1). The frame (1) is provided with a storage mechanism (9) for storing the casters after the frame (1) is moved. The lower cover (2) is provided with a lifting mechanism (8) for lifting the rolls. The lower cover (2) is provided with a clamping mechanism (4) for clamping the rolls. The connecting frame (5) is provided with a pulling mechanism (6) for opening or closing the top cover (3).
2. The roll preheating device according to claim 1, characterized in that: The storage mechanism (9) includes a third motor (92), a threaded rod (93), and a lifting plate (91). The bottom of the third motor (92) is fixedly connected to the bottom inner wall of the frame (1). The bottom of the frame (1) is provided with a groove (94). The top of the threaded rod (93) is rotatably connected to the top inner wall of the groove (94). The outer side of the lifting plate (91) is slidably connected to the inner wall of the groove (94). The top of the lifting plate (91) is provided with a threaded hole. The threaded rod (93) is threadedly connected to the threaded hole. The tops of the four casters are fixedly connected to the four bottom corners of the lifting plate (91). The output end of the third motor (92) passes through the bottom of the frame (1) and is fixedly connected to the top of the threaded rod (93).
3. The roll preheating device according to claim 1, characterized in that: The lifting mechanism (8) includes a bracket (83), two arc plates (81) and a second hydraulic cylinder. The bracket (83) is U-shaped. The bottom of the two arc plates (81) is welded to the top of both ends of the bracket (83). The bracket (83) is located inside the lower cover (2). The bottom of the second hydraulic cylinder is fixedly connected to the bottom inner wall of the frame (1). The telescopic part of the second hydraulic cylinder passes through the bottom of the lower cover (2) and is fixedly connected to the bottom of the bracket (83). The same rotating rod (82) is rotatably provided on the side of the two arc plates (81) that are close to each other. There are multiple rotating rods (82).
4. A roll preheating device according to claim 1, characterized in that: The clamping mechanism (4) includes a first hydraulic cylinder (41), a first clamping plate (42), and a second clamping plate (43). One end of the first hydraulic cylinder (41) is fixedly connected to one side of the lower cover (2). The telescopic part of the first hydraulic cylinder (41) passes through one side of the lower cover (2) and is fixedly provided with a rotating seat. The first clamping plate (42) is rotatably mounted on the rotating seat. One side of the second clamping plate (43) is rotatably connected to one side of the inner wall of the lower cover (2).
5. A roll preheating device according to claim 1, characterized in that: The pulling mechanism (6) includes a frame (61), a first motor (62), a winding wheel, a pull rope (64), and a frame (63). The top of the frame (61) is fixedly connected to the top inner wall of the connecting frame (5). One side of the first motor (62) is fixedly connected to one side of the frame (61). The output end of the first motor (62) passes through one side of the frame (61) and is fixedly connected to one side of the winding wheel. The top of the frame (63) is fixedly connected to the top inner wall of the connecting frame (5). The same roller is rotatably connected to the inner walls on both sides of the frame (63). The pull rope (64) is in contact with the roller. One end of the pull rope (64) is fixedly connected to one side of the winding wheel, and the other end is fixedly connected to one side of the top cover (3).
6. A roll preheating device according to claim 1, characterized in that: A second motor (7) for rotating the roll in the clamping state is fixedly installed on one side of the lower cover (2). The output end of the second motor (7) passes through one side of the lower cover (2) and is fixedly connected to one side of the second clamping plate (43).
7. A roll preheating device according to claim 2, characterized in that: The inner walls of both sides of the groove (94) are provided with limiting grooves for limiting the lifting plate (91) to prevent it from falling off the frame (1). Limiting blocks are fixedly provided on both sides of the lifting plate (91), and one side of the limiting block is slidably connected to the inner wall of the limiting groove.