Guide roller way for square billet induction heating equipment

Abstract

The utility model discloses a guide roller way for square billet induction heating equipment, which comprises a mounting rack, a gear motor and four rollers, each roller comprises a roller shaft and a roller wheel sleeved in the middle of the roller shaft, the four rollers are divided into two horizontal rollers and two vertical rollers, and the two horizontal rollers are arranged in the mounting rack up and down; the two vertical rollers are arranged in the mounting frame left and right and are positioned on the rear sides of the two horizontal rollers; a window with a square-shaped section is formed between the two horizontal rollers and the two vertical rollers, and the window with the square-shaped section is used for a blank to pass through. According to the guide and guard roller way, the structure that a group of horizontal rollers and a group of vertical rollers are arranged in a combined mode is adopted, blanks passing through a coil are limited in the horizontal direction and the vertical direction, and therefore the effect of protecting the induction heating coil is achieved, the blanks can be effectively prevented from colliding with the induction heating coil in the advancing process, safety of induction heating equipment is guaranteed, and the service life of the induction heating equipment is prolonged. And the equipment use and maintenance cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to a guide roller for billet induction heating equipment. Background Art

[0002] With the development of the economy and society, bars and wires of various materials and specifications have become indispensable basic materials in industrial production, especially alloy tool steels and high-temperature alloys with excellent performance and high added value. Under current process conditions, bars and wires are continuously rolled and formed through multiple rolling mills. To increase production capacity, ensure product specification accuracy, and enhance mechanical properties, continuous and stable delivery of hot billets to the rolling mills that meet the start rolling temperature and maintain uniform temperature is crucial. Induction heating equipment is essential for supplementing and equalizing the heat of the billets before they enter the rolling mill. It provides gradient heating of the billets as they travel. The billets pass through a series of induction coils and guide rollers, achieving the target temperature and required temperature uniformity before entering the rolling mill. Continuous and reliable operation of the induction heating equipment is crucial. The billets pass through the inner bore of the coil assembly, making no contact with the induction coils. Guide rollers, spaced between the coils, play a key role in conveying the billets and protecting the coils.

[0003] See also Figure 1 Typically, the equipment in a bar and wire rod rolling line is arranged sequentially. The induction heating system typically utilizes multiple coils connected in series for continuous heating, gradually heating the billet from ambient or a lower temperature to the target temperature required by the mill as it travels. In the induction heating system, conveyor rollers 2' and induction heating coils 3' are arranged alternately. A guide device 4' is installed at the induction heating system entrance to ensure smooth entry of the upstream billet into the first set of guide rollers 2'.

[0004] The blanks 1' travel on the conveyor roller 2' and pass through the feeding holes of the induction heating coils 3' one by one. When the coils are supplied with alternating current of a specific frequency after rectification and inversion, an alternating magnetic field is generated, in which eddy currents are generated in the blanks, thereby being heated.

[0005] The induction heating coil 3' is non-contact with the blank 1'. To achieve higher heating efficiency, the cross-sectional dimensions of the coil feed hole are generally designed according to the cross-sectional specifications of the blank 1', and the coil cross-sectional dimensions are considered to be as close as possible to the cross-sectional specifications of the blank.

[0006] On rod and wire production lines, the billet 1' is typically a continuous cast billet produced by the upstream continuous casting machine, with some special steel lines using forged billets. These billets vary in straightness, and residual potholes and burrs are common on the surface and head of the forged billets. These defects can cause the billet to collide with the induction heating coil during its travel, causing mechanical damage to the equipment and impacting normal production. On rod and wire production lines, the upstream incoming material is typically over 10 meters long and has poor straightness. Furthermore, when the billet's head is engaged by the rolling mill while the tail of the billet remains in the heating equipment, rolling can cause the tail of the billet to vibrate, seriously impacting the safety of the induction heating coil.

[0007] Therefore, ensuring equipment safety and effectively preventing the billet from colliding with the coil during its travel has become a pressing issue. Furthermore, in actual production, in addition to protecting the induction heating coil from mechanical impact by the billet, the billet should be kept as close to the geometric center of the coil passage hole as possible. This is because when the billet passes through the coil center, heating efficiency is effectively improved, energy consumption is reduced, and temperature uniformity is enhanced, thereby improving the microstructural properties and product quality of the rolled product. Utility Model Content

[0008] The purpose of the utility model is to overcome the defects of the prior art and provide a guide roller for square billet induction heating equipment, which can effectively prevent the billet from colliding with the induction heating coil during its movement, ensure the safety of the induction heating equipment, effectively reduce the cost of equipment use and maintenance, and can limit the billet to be basically in the center position of the coil, which can effectively improve the heating efficiency, reduce the energy consumption of the equipment, and improve the temperature uniformity of the billet, thereby improving the microstructure performance and product quality of the rolled product.

[0009] The technical solution to achieve the above object is: a guide roller for billet induction heating equipment, comprising a mounting frame, a gear motor and four rollers, each roller comprising a roller shaft and a roller wheel sleeved in the middle thereof, the four rollers being divided into two horizontal rollers and two vertical rollers, wherein:

[0010] The two horizontal rollers are arranged one above and one below in the mounting frame;

[0011] The two vertical rollers are arranged in the mounting frame, one on the left and one on the right, and are located behind the two horizontal rollers;

[0012] A "mouth" shaped cross-sectional window is formed between the two horizontal rollers and the two vertical rollers, and the "mouth" shaped cross-sectional window is used for the blank to pass through;

[0013] The gear motor is arranged outside the mounting frame, and the output end of the gear motor is connected to the roller shaft of the lower horizontal roller and provides power for the advance of the blank. The remaining three rollers are all idle rollers.

[0014] In the above-mentioned guide roller for billet induction heating equipment, the size of the "mouth"-shaped cross-section window is adapted to the size of the billet to be processed.

[0015] The above-mentioned guide roller for billet induction heating equipment, wherein the "mouth"-shaped cross-sectional window of the guide roller limits the billet to be located at the geometric center position of the feed hole of the induction heating coil.

[0016] The above-mentioned guide roller for billet induction heating equipment, wherein the roller shaft adopts a hollow design and is water-cooled.

[0017] Compared with the conventional conveying roller with a single roller, the guide roller for billet induction heating equipment of the utility model has the following advantages:

[0018] (1) A set of horizontal rollers and a set of vertical rollers are designed. The four rollers form a "mouth"-shaped cross-sectional window, which can limit the swing of the billet in the horizontal and vertical directions, thereby protecting the induction heating coil and effectively preventing the billet from colliding with the induction heating coil during its movement, ensuring the safety of the induction heating equipment; and can limit the billet to be basically in the center of the coil, which can effectively improve the heating efficiency, reduce the energy consumption of the equipment, and improve the temperature uniformity of the billet, thereby improving the microstructure performance and product quality of the rolled product;

[0019] (2) The opening of the "mouth"-shaped cross-section window formed by the four rollers can be flexibly designed according to the specifications of the incoming materials, taking into account the passability of incoming materials of different specifications and the protection of the coil;

[0020] (3) The roller structure adopts a combined design of roller shaft and roller wheel. After the equipment has been used for a period of time, the roller surface is bound to wear out. The roller wheel can be removed and replaced separately, effectively reducing the equipment use and maintenance costs;

[0021] (4) Considering the safety and operational reliability of the entire roller conveyor, the roller shaft adopts a hollow design and is water-cooled to prevent the roller from being in contact with the hot blank for a long time and causing its own temperature to rise, thereby reducing its mechanical strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the induction heating equipment;

[0023] Figure 2 This is a structural schematic diagram of the guide roller for billet induction heating equipment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of a single roller of a guide roller table;

[0025] Figure 4 This is the position relationship diagram between the guide roller and the blank;

[0026] Figure 5 This is a diagram showing the positional relationship among the guide roller, coil and blank. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the specific implementation methods are described in detail below with reference to the accompanying drawings:

[0028] See also Figures 2 to 5 The preferred embodiment of the present invention is a guide roller conveyor for billet induction heating equipment, comprising a mounting frame 1, a gear motor 2, and four rollers, each of which comprises a roller shaft 31 and a roller wheel 32 sleeved therein. The four rollers are divided into two horizontal rollers 4 and two vertical rollers 5.

[0029] Two horizontal rollers 4 are arranged one above and one below in the mounting frame 1; two vertical rollers 5 are arranged one left and one right in the mounting frame 1, and are located on the rear side of the two horizontal rollers 4; a "mouth"-shaped cross-sectional window 6 is formed between the roller wheels 32 of the two horizontal rollers 4 and the two vertical rollers 5, and the "mouth"-shaped cross-sectional window 6 is used for the blank 7 to pass through.

[0030] The gear motor 2 is arranged outside the mounting frame 1, and the output end of the gear motor 2 is connected to the roller shaft 31 of the lower horizontal roller and provides power for the advance of the blank 7. The other three rollers are all idle rollers.

[0031] The opening of the "mouth"-shaped window formed by the four rollers can be flexibly designed based on billet specifications, balancing the passage of different sizes of incoming materials with the protection of the induction heating coils. The size of the "mouth"-shaped window 6 is adapted to the size of the billet 7 to be processed. The "mouth"-shaped window 6 of the guide roller conveyor restricts the billet to the geometric center of the feed hole of the induction heating coil 8, effectively improving heating efficiency, reducing equipment energy consumption, and enhancing the temperature uniformity of the billet, thereby improving the microstructure and quality of the rolled product.

[0032] The roller structure utilizes a combined shaft and roller wheel design. While the roller surface will inevitably wear out over time, the roller wheel can be removed and replaced individually, effectively reducing equipment operation and maintenance costs. The roller shaft is hollow and water-cooled. The equipment's onboard cooling water system provides continuous cooling, preventing the roller wheel from heating up due to prolonged contact with hot material, which could lead to a decrease in mechanical strength.

[0033] To sum up, the guide roller for the billet induction heating equipment of the utility model adopts a structure in which a group of horizontal rollers and a group of vertical rollers are jointly arranged, which can limit the swing of the billet in the horizontal and vertical directions, thereby protecting the induction heating coil, and can effectively prevent the billet from colliding with the induction heating coil during the movement, ensuring the safety of the induction heating equipment, effectively reducing the equipment use and maintenance costs, and improving the temperature uniformity of the billet, thereby improving the microstructure properties and product quality of the rolled products.

[0034] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A guide roller for billet induction heating equipment, characterized in that: The machine comprises a mounting frame, a gear motor and four rollers, each roller comprising a roller shaft and a roller wheel sleeved in the middle thereof, and the four rollers are divided into two horizontal rollers and two vertical rollers, wherein: The two horizontal rollers are arranged one above and one below in the mounting frame; The two vertical rollers are arranged in the mounting frame, one on the left and one on the right, and are located behind the two horizontal rollers; A "mouth" shaped cross-sectional window is formed between the two horizontal rollers and the two vertical rollers, and the "mouth" shaped cross-sectional window is used for the blank to pass through; The gear motor is arranged outside the mounting frame, and the output end of the gear motor is connected to the roller shaft of the lower horizontal roller and provides power for the advance of the blank. The remaining three rollers are all idle rollers.

2. The guide roller for billet induction heating equipment according to claim 1, characterized in that: The size of the "mouth"-shaped cross-sectional window is adapted to the size of the blank to be processed.

3. The guide roller for billet induction heating equipment according to claim 1, characterized in that: The "mouth"-shaped cross-sectional window of the guide roller conveyor restricts the blank to be located at the geometric center position of the feed hole of the induction heating coil.

4. The guide roller for billet induction heating equipment according to claim 1, characterized in that: The roller shaft adopts a hollow design and is water-cooled.

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