A conveying system and method for a crescent-shaped billet

Abstract

The present invention belongs to the technical field of crescent-shaped billet conveying, and specifically relates to a conveying system and a conveying method for crescent-shaped billets. The conveying system includes: a plurality of charging roller tables; a frame, which includes a plurality of main beams and paired concave guide plates. The plurality of main beams are respectively located on the outer sides of the two sides in the vertical direction of the plurality of charging roller tables, and the paired concave guide plates are located above the charging roller tables and are arranged front and back along the billet conveying direction; two slide rails, which are respectively located on the outer sides of the two sides in the vertical direction of the plurality of charging roller tables and extend along the vertical direction of the plurality of charging roller tables; a chute with an outward opening is formed on the side surface of the slide rail; a plurality of pulleys, which are embedded in the chute and extend outward to be connected to the lower ends of the main beams; a driving device, which is connected to the extended ends of the pulleys and fixed on the main beams. The present invention can prevent the crescent-shaped billets from tipping over while synchronously and stably conveying them.

Description

Technical Field

[0001] The present invention belongs to the technical field of crescent-shaped billet conveying, and particularly relates to a conveying system and a conveying method for crescent-shaped billets. Background Art

[0002] In existing steel production workshops, after red-hot steel at 800 - 900 °C comes out of the steelmaking process, if low-temperature steel is to be sent to the rolling mill workshop, the billets are flipped and cooled on the steelmaking cooling bed to prevent deformation. After the billets are cooled, they are placed together and transported when needed. However, in order to minimize the cost of rolling, enterprises have adopted various methods for heat preservation, striving to send the billets into the heating furnace in the rolling mill workshop with the least temperature loss, which can effectively reduce the consumption of heating energy in the heating furnace. However, no matter how it is controlled, there will be irresistible asynchrony between the upstream and downstream processes, such as steelmaking equipment failures, or rolling mill workshop equipment failures, and the speed of digesting billets in the rolling mill workshop not matching the speed of billets in the steelmaking workshop production workshop, etc. If the high-temperature billets cannot be rolled immediately, due to the principle of cold shrinkage, the cooling speed at both ends of the billets is faster than that in the middle of the billets, resulting in large-angle bending at both ends of the billets to form crescent-shaped billets, and they are side-bent crescent-shaped billets.

[0003] In summary, the disadvantages in the prior art are as follows:

[0004] Firstly: The bending arcs of the billets that become crescent-shaped after cold shrinkage are also different. The maximum width can be bent to 500 mm. The original designed roller table roller surface cannot convey the deformed crescent-shaped billets into the heating furnace. Even if it is reversed into an upward-bent crescent-shaped billet, there is a possibility of tipping during the conveying process, especially during the lateral movement of the billet from the heating furnace cantilever roller to the heating furnace fixed beam, which is extremely easy to tip over.

[0005] Secondly: The existing treatment method for crescent-shaped billets with a large bending degree is to reload them and send them to the splitting area, cut the deformed billets into sections, and then transfer them back to the steelmaking process for re-melting. Although this operation method effectively treats the deformed billets, the cost is extremely high.

[0006] Thirdly: Enterprises can purchase large-scale straightening equipment for this problem, but it requires a large amount of investment, a large site, and there are also multiple transfer operation steps, which is not the optimal treatment method.

[0007] In summary, there is an urgent need in this field for an invention that can digest crescent-shaped or crescent-shaped billets with a small investment, can adapt to the site, prevent billets from tipping over, and even can straighten them. Summary of the Invention

[0008] The object of the present invention is to overcome the defect that the crescent-shaped billets are prone to roll over during the conveying process in the prior art, and to provide a conveying system and a conveying method for crescent-shaped billets. The conveying system can prevent the crescent-shaped billets from rolling over while conveying them synchronously, and can be adapted to the stable conveying of crescent-shaped billets of different specifications.

[0009] To achieve the above object, in the first aspect, the present invention provides a conveying system for crescent-shaped billets, comprising:

[0010] A plurality of charging roller tables, which are located outside the furnace door of the heating furnace and arranged side by side;

[0011] A frame, which comprises a plurality of main beams and a pair of concave guide plates. The plurality of main beams are respectively located on the outer sides of the two vertical sides of the plurality of charging roller tables, and the pair of concave guide plates are located above the charging roller tables and arranged front and back along the billet conveying direction, and are used for limiting the two ends of the tooth-shaped billets and guiding and conveying them synchronously to prevent them from tipping over;

[0012] Two slide rails, which are respectively located on the outer sides of the two vertical sides of the plurality of charging roller tables and extend along the vertical direction of the plurality of charging roller tables; an outwardly opening chute is formed on the side surface of the slide rail;

[0013] A plurality of pulleys, which are embedded in the chute and extend outward to be connected to the lower ends of the main beams;

[0014] A driving device, which is connected to the extended ends of the pulleys and fixed on the main beams, and is used for driving the pulleys to move in the slide rails, and simultaneously driving the frame to move synchronously with the conveying of the charging roller tables.

[0015] In some preferred embodiments, the conveying system further comprises: a pressing mechanism, which is installed on the frame and located above the concave guide plates, and is used for cooperating with the charging roller tables to straighten or limit the billets in the concave guide plates.

[0016] More preferably, the conveying system further comprises: a thermometer, which is arranged on any one of the concave guide plates and is used for measuring the temperature of the billets to judge whether the pressing mechanism performs a straightening operation or a limiting operation.

[0017] More preferably, the pressing mechanism corresponds to the concave guide plates one by one; and the pressing mechanism comprises a lifting rod and a pressing plate connected to the lower end of the lifting rod. The lifting rod is installed on the frame, and the pressing plate is arranged horizontally.

[0018] In some preferred embodiments, the conveying system further comprises: proximity switches, which are at least two and are respectively arranged at the front end and the rear end of the charging roller tables, and are used for sensing whether the main beams reach the corresponding positions, so as to control the stop or movement of the frame.

[0019] Preferably, there are multiple driving devices, which correspond to a number of pulleys one by one.

[0020] Preferably, the inlet end of the concave guide plate is a flared opening.

[0021] Preferably, the concave guide plate is located at the center of the conveying surface of the charging roller table.

[0022] In some preferred embodiments, the conveying system further includes:

[0023] A connecting shaft, one end of which is connected to the outer end of the pulley, and the other end passes through the corresponding main beam on the same side and extends outward to be connected to the driving device;

[0024] A bearing assembly, which rotatably connects the connecting shaft to the corresponding main beam on the same side;

[0025] A coupling, which is installed at the other end of the connecting shaft and is connected to the driving device.

[0026] In some preferred embodiments, the conveying system further includes:

[0027] A cantilever roller, which is located inside the heating furnace, a baffle extending in the vertical direction is provided at its outer end, and the height of its inner end is flush with the height of the fixed beam of the heating furnace inside the heating furnace;

[0028] A pusher, which is located outside the heating furnace and is arranged outside the outer end of the cantilever roller, and is used to push the billet located on the cantilever roller onto the fixed beam of the heating furnace for sufficient heating in the middle of the heating furnace.

[0029] More preferably, the roller surface of the cantilever roller is inclined downward towards the direction close to the baffle, and the inclination angle is 3-7°, so as to induce the billet to move towards the outer end of the cantilever roller to prevent it from tipping over.

[0030] More preferably, the height of the upper end of the baffle is lower than half of the height of the billet located on the cantilever roller;

[0031] More preferably, the pusher includes a push rod, and the outer end of the push rod is inclined downward towards the direction close to the baffle, and the inclination angle is 10-15°, so as to prevent the billet from tipping over during pushing and smoothly push the billet onto the fixed beam of the heating furnace.

[0032] Preferably, the end of the fixed beam of the heating furnace close to the pushing direction is provided with a circular arc angle to eliminate the blockage of the lateral movement of the billet.

[0033] In a second aspect, the present invention provides a method for conveying a crescent-shaped billet, adopting the conveying system described in the first aspect, and the conveying method includes the following steps:

[0034] a: In the state where the furnace inlet roller table stops running, hoist the upwardly curved crescent-shaped billet onto the furnace inlet roller table;

[0035] b: Simultaneously start the driving device and the furnace inlet roller table, drive the pulley to move on the slide rail, the pulley drives the main beam and the frame to move. During the movement, the billet gradually gets stuck between the paired concave guide plates. Thus, during the process of conveying the billet along with the furnace inlet roller table, the concave guide plates limit and guide the billet and cooperate with the furnace inlet roller table for synchronous conveying to prevent it from tipping over, and then send it into the heating furnace.

[0036] Preferably, step b further includes: controlling the frame to stop or move through the driving device by whether the main beam reaches the target position of the proximity switch set.

[0037] In some preferred embodiments, in step b, after the billet gets stuck between the paired concave guide plates, it further includes:

[0038] b1: For billets above the target temperature, simultaneously turn off the driving device and the furnace inlet roller table to stop their movement, and then press down both ends of the billet simultaneously through the pressing mechanism, with the upper surface of the furnace inlet roller table as the force-bearing surface, so as to quickly straighten the billet on the furnace inlet roller table. After straightening, the pressing mechanism retracts so that the billet and the furnace inlet roller table form a non-pressed state; start the driving device and the furnace inlet roller table to make them move, thereby conveying the billet into the heating furnace;

[0039] b2: For billets below the target temperature, simultaneously turn off the driving device and the furnace inlet roller table to stop their movement, and then press down through the pressing mechanism until the shortest vertical distance from the billet is less than 20 mm, which is used to suppress the phenomenon that the two ends of the billet swing a lot and cause severe jumping during the conveying process of the billet on the furnace inlet roller table; start the driving device and the furnace inlet roller table to make them move, thereby conveying the billet into the heating furnace.

[0040] In some preferred embodiments, the conveying method further includes:

[0041] c: After the billet enters the heating furnace, the inclined surface of the cantilever roller induces the billet to move towards the side of the edge of the cantilever roller, preventing the billet from tipping over on the cantilever roller and causing production accidents;

[0042] d: After the cantilever roller stops, the pusher steadily pushes the billet horizontally to the fixed beam of the heating furnace.

[0043] Through the above technical solutions, especially by setting a movable concave guide plate, the invention can prevent the crescent-shaped billet from tipping over due to abnormal jumping during the conveying process on the furnace inlet roller table, and realizes full protection; moreover, the cooperation between the slide rail and the pulley not only improves the stability of linear movement, but also effectively eliminates the abnormal jumping of the crescent-shaped billet. The pulley is fixed on the outside of the slide rail, which can effectively prevent the pulley from derailing due to external forces, making the billet stuck in the concave guide plate more stable and efficient during the conveying process on the furnace inlet roller table, eliminating the need for operators to convey while tracking and adjusting the roller table speed according to the on-site situation to avoid the tipping of the billet.

[0044] In short, the invention can prevent the crescent-shaped billet from tipping over during the conveying process on the furnace inlet roller table, and at the same time can ensure the straightness during the transmission process, and convey it to the heating furnace more stably and efficiently. At the same time, it also has the following advantages:

[0045] First: The method of processing the crescent-shaped billet does not require cutting it back to the furnace for remelting and pouring into a new billet. Without increasing significant costs, it maximally reduces the costs of the enterprise, especially plays a very positive role in energy conservation and environmental protection, and at the same time effectively reduces the production intensity of the steelmaking process;

[0046] Second: Through the preferred proximity switch conveying system of the invention, the intelligence of conveying the crescent-shaped billet can be improved, reducing the problem that operators need to constantly monitor and adjust the roller table speed when conveying the crescent-shaped billet, and improving the universality and application area;

[0047] Third: The invention can also directly straighten the crescent-shaped billet, with diversified functions.

[0048] In the preferred specific structure of the pusher and the cantilever roller of the invention, the technical problems of the crescent-shaped billet tipping over when entering the heating furnace can also be effectively solved, such as the billet tipping over on the cantilever roller and the billet tipping over when the cantilever roller moves to the upper side of the fixed beam of the heating furnace. Among them, the inclination angle of the cantilever roller is set to induce the billet to move in the direction where the cantilever roller is provided with a baffle, so as to guide the billet. Even if there is abnormal jumping, it will not tip over, which can not only meet the conveying of rectangular billets, but also ensure the conveying stability of the crescent-shaped billet on the cantilever roller; the inclination angle of the pusher rod of the pusher is set to be conducive to inducing the billet to tilt in the direction of the pusher rod during the lateral movement, combined with the pushing force of the pusher rod, the billet will not tip over, restraining the billet from tipping over in the reverse direction, and smoothly pushing the billet onto the fixed beam of the heating furnace, thus avoiding the possible occurrence of jumping during the front-end conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0050] Figure 1 It is a schematic structural diagram of the part of the conveying system of the present invention outside the heating furnace.

[0051] Figure 2 is Figure 1 a schematic structural diagram of the cooperation between the slide rail and the pulley and the driving device in

[0052] Figure 3 It is a schematic structural diagram of the flare opening of the concave guide plate.

[0053] Figure 4 It is a schematic structural diagram of the part of the conveying system of the present invention inside the heating furnace.

[0054] Figure 5 is Figure 4 a right view of the part of

[0055] Explanation of reference numerals

[0056] 1 - Cantilever roller, 2 - Moving beam of heating furnace, 3 - Fixed beam of heating furnace, 4 - Heating furnace, 5 - Baffle, 6 - Pusher, 7 - Steel billet, 8 - Pressing mechanism, 9 - Slide rail, 10 - Pulley, 11 - Main beam, 12 - Flat plate, 13 - Concave guide plate, 14 - Connecting shaft, 15 - Driving device, 16 - Coupling, 17 - Bearing assembly, 18 - Inlet roller table, 19 - Driving device base, 20 - Proximity switch; 801 - Lifting rod, 802 - Pressure plate; 1301 - Flare opening. Detailed description of specific embodiments

[0057] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, left, right" usually refer to the orientation understood in combination with the drawings and actual applications. "Inside and outside" refer to the inside and outside of the contour of the component. "Front" refers to the sliding direction of the steel billet, and the opposite is the back.

[0058] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be understood as limiting the present invention.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0060] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. 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.

[0061] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0062] In the ranges disclosed herein, the endpoints and any values are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0063] In a first aspect, the present invention provides a conveying system for a crescent-shaped billet, as Figure 1 and Figure 2 shown, including:

[0064] A plurality of charging roller tables 18, which are located outside the furnace door of the heating furnace 4 and arranged side by side, for conveying the billets 7;

[0065] A frame, which includes several main beams 11 and a pair of concave guide plates 13. The several main beams 11 are respectively located on both sides outside the vertical direction of several charging roller tables 18. The pair of concave guide plates 13 are located above the charging roller tables 18 and are arranged front and back along the conveying direction of the billet 7, and are used for limiting both ends of the tooth-shaped billet 7 and synchronously guiding and conveying it to prevent it from tipping over;

[0066] Two slide rails 9, which are respectively located on both sides outside the vertical direction of several charging roller tables 18 and extend along the vertical direction of several charging roller tables 18; an outwardly opening chute is provided on the side surface of the slide rail 9;

[0067] Several pulleys 10, which are embedded in the chute and extend outward to be connected to the lower ends of the main beams 11;

[0068] A driving device 15, which is connected to the extending end of the pulley 10 and fixed on the main beam 11, and is used for driving the pulley 10 to move in the slide rail 9, and at the same time driving the frame to move synchronously with the conveying of the charging roller table 18.

[0069] In the present invention, those skilled in the art can design the specific structure of the frame according to requirements, as long as the corresponding functions can be realized. Preferably, the frame further includes a flat plate 12. The flat plate 12 is located above several charging roller tables 18, and the several main beams 11 and the pair of concave guide plates 13 are both installed on the flat plate 12. Preferably, there are four main beams 11 and they are arranged at the corresponding four corners of the flat plate 12, and there are also four pulleys 10 and they correspond to the main beams 11 one by one. It can be understood that the concave guide plate 13 has an upward opening and is fixed at both ends of the flat plate 12, and the concave part thereof is used for clamping the billet 7.

[0070] Preferably, the length of the flat plate 12 ≥ the length of the crescent-shaped billet 7, which is more conducive to covering the billet 7, so as to carry out more stable guiding or assistance to it.

[0071] Preferably, there are multiple driving devices 15 and they correspond to several pulleys 10 one by one. It can be understood that on both sides of the frame, the driving devices 15 are symmetrically arranged.

[0072] In the present invention, the driving device 15 is preferably installed on the main beam 11 through a driving device base 19, so that the driving device 15 can stably move synchronously with the main beam 11 driven by the pulley 10, and at the same time, the speed difference value can be further reduced, and the stability of control can be improved.

[0073] Preferably, as Figure 3As shown, the inlet end of the concave guide plate 13 is a flared opening 1301. In this preferred solution, the concave guide plate 13 can automatically guide the billet 7 into the concave guide plate 13 through the flared opening 1301, without the need for operators to adjust the centering, nor the need to add auxiliary equipment for the docking of the billet 7 and the concave guide plate 13.

[0074] Preferably, the concave guide plate 13 is more than 50 mm higher than the roller surface of the furnace inlet roller table 18, and the height of the flat plate 12 of the frame is more than 700 mm higher than the roller surface of the furnace inlet roller table 18; the thickness of the concave guide plate 13 is greater than 20 mm.

[0075] Preferably, the concave guide plate 13 is located at the center of the conveying surface of the furnace inlet roller table 18. It should be understood that only one billet 7 is conveyed at a time during conveying, as two billets 7 will cause blockage.

[0076] Those skilled in the art can select the gap between the pulley 10 and the side of the slide rail 9 according to requirements. In the present invention, preferably, the gap between the pulley 10 and the side of the slide rail 9 in the vertical direction is ≥1 mm, which is more convenient for the pulley 10 to smoothly move along the outside of the slide rail 9, and at the same time can limit the large jump of the billet 7.

[0077] In the present invention, the length of the slide rail 9 is at least the same as the length in the vertical direction in which several furnace inlet roller tables 18 are arranged side by side. Specifically, they can be the same. Of course, they can also be as Figure 1 shown, the length of the slide rail 9 is longer.

[0078] In some preferred embodiments, as Figure 1 shown, the conveying system further includes: a pressing mechanism 8, which is installed on the frame and located above the concave guide plate 13, and is used to cooperate with the furnace inlet roller table 18 to straighten or limit the billet 7 in the concave guide plate 13. In this preferred solution, it can not only quickly correct the bent crescent-shaped billet 7, but also realize stable limiting conveying.

[0079] More preferably, the pressing mechanism 8 corresponds to the concave guide plate 13 one by one.

[0080] More preferably, the pressing mechanism 8 includes a lifting rod 801 and a pressing plate 802 connected to the lower end of the lifting rod 801. The lifting rod 801 is installed on the frame, and the pressing plate 802 is horizontally arranged. The lifting rod 801 can be selected from equipment with large output capacity such as hydraulic cylinders and worm gears.

[0081] Adopting the above technical solution of the pressing mechanism 8 with the preferred settings can not only achieve the straightening function of the high-temperature billet 7. For example, in a specific embodiment, when the temperature of the billet 7 is above the target temperature (e.g., 650°), the pressing mechanism 8 presses down on both the front and rear sides of the billet 7 simultaneously. The pressing plate 802 contacts the billet 7 that bends upward on both sides, and the roller surface of the furnace inlet roller table 18 serves as the force-bearing surface, and the pressing mechanism 8 serves as the straightening surface, realizing rapid straightening of the billet 7 on the roller surface of the furnace inlet roller table 18. After straightening, the pressing mechanism 8 retracts by more than 20 mm, allowing the billet 7 and the furnace inlet roller table 18 to form a non-pressed state, and then starting the furnace inlet roller table 18 and the driving device 15 to convey the billet 7 into the heating furnace 4; for billets below the target temperature (e.g., 650°), the pressing mechanism 8 drives the pressing plate 802 to press down until the shortest vertical distance between the pressing plate and the billet 7 is less than 20 mm, which can inhibit the phenomenon that the two ends of the crescent-shaped billet 7 swing violently and cause severe jumping during the conveying process on the furnace inlet roller table 18.

[0082] More preferably, the conveying system further includes: a thermometer (not shown in the figure), which is arranged on any one of the concave guide plates 13 and is used to measure the temperature of the billet 7 to determine whether the temperature of the billet 7 is within the target temperature range, so as to control the pressing mechanism 8 to perform straightening operation or limiting operation.

[0083] In some preferred embodiments, the conveying system further includes: proximity switches 20, which are at least two and are respectively arranged at the front end and the rear end of the furnace inlet roller table 18 and are used to sense whether the main beam 11 reaches the corresponding position, so as to control the stop or movement of the rack. Under this preferred scheme, it is more conducive to improving the automatic control ability and controlling the start, stop or moving speed of the driving device 15 according to the position of the rack.

[0084] In some preferred embodiments, as Figure 2 shown, the conveying system further includes:

[0085] A connecting shaft 14, one end of which is connected (preferably by interference fit key connection) to the outer end of the pulley 10, and the other end passes through the corresponding main beam 11 on the same side and extends outward to be connected to the driving device 15;

[0086] A bearing assembly 17, which rotatably connects the connecting shaft 14 to the corresponding main beam 11 on the same side;

[0087] A coupling 16, which is installed at the other end of the connecting shaft 14 and is connected to the driving device 15. Adopting the above technical solution can not only achieve the function of stable movement but also improve the service life of the equipment.

[0088] The bearing assembly 17 of the present invention includes a bearing and a bearing seat. The bearing sleeve is arranged outside the connecting shaft 14 and connected to the bearing seat. The bearing seat and the connecting shaft 14 are preferably keyed. The bearing seat is installed on the main beam 11, so that the pulley 10 is stably fixed on the outside of the slide rail 9 through the assembly of the connecting shaft 14 and the bearing assembly 17.

[0089] In some preferred embodiments, Figure 4 and Figure 5 As shown, the conveying system also includes:

[0090] A cantilever roller 1 is located in the heating furnace 4, and a baffle 5 extending in a vertical direction is provided at its outer end, and the height of its inner end is flush with the height of the heating furnace fixed beam 3 in the heating furnace 4;

[0091] The steel pusher 6 is located outside the heating furnace 4 and is arranged outside the outer end of the cantilever roller 1, and is used to push the steel billet 7 located on the cantilever roller 1 onto the fixed beam 3 of the heating furnace so as to be fully heated in the middle of the heating furnace 4.

[0092] It can be understood that the installation height (ie, the conveying surface) of the cantilever roller 1 is consistent with the furnace entry roller 18 , so that the furnace entry roller 18 can convey the steel billet 7 to the cantilever roller 1 .

[0093] More preferably, the roller surface of the cantilever roller 1 is tilted downward toward the direction close to the baffle 5, and the tilt angle is 3-7°, which is used to induce the billet 7 to move toward the outer end of the cantilever roller 1 to prevent it from tipping over. In this preferred solution, the tilt angle can induce the billet 7 to move toward the direction where the baffle 5 is provided on the cantilever roller 1, thereby guiding the billet 7, and even if abnormal jumping occurs, it will not tip over, which can not only meet the conveying requirements of straight billets, but also maintain the conveying stability of the crescent-shaped billet 7 on the cantilever roller 1.

[0094] More preferably, the upper end height of the baffle 5 is lower than half the height of the billet 7 on the cantilever roller 1. Under this preferred solution, it is more conducive for the pusher 6 to contact the billet 7 below the center point of the billet 7, so that the billet 7 can be stably tilted on the pusher 6 to prevent it from tipping forward.

[0095] More preferably, the steel pusher 6 includes a push rod, the outer end of which is tilted downward toward the direction close to the baffle 5, and the tilt angle is 10-15°, which is used to prevent the steel billet 7 from tipping over during pushing so as to steadily push the steel billet onto the fixed beam 3 of the heating furnace. Under this preferred solution, the appropriate tilt angle can help to induce the steel billet 7 to tilt toward the push rod during lateral movement, and combined with the force of the push rod, the steel billet 7 will not tip over, and the reverse tipping of the steel billet 7 is suppressed, and the steel billet 7 is steadily pushed onto the fixed beam 3 of the heating furnace, thereby avoiding the possibility of jumping during front-end transportation.

[0096] Preferably, an arc angle is provided at the end of the fixed beam 3 of the heating furnace close to the billet pushing direction to eliminate the blockage of the lateral movement of the billet 7.

[0097] In a second aspect, the present invention provides a method for conveying a crescent-shaped billet, using the conveying system described in the first aspect, and the conveying method includes the following steps:

[0098] a: When the furnace inlet roller table 18 is in a stopped state, hoist the upwardly curved crescent-shaped billet 7 onto the furnace inlet roller table 18.

[0099] b: Start the driving device 15 and the furnace inlet roller table 18 simultaneously, drive the pulley 10 to move on the slide rail 9, the pulley 10 drives the main beam 11 and the frame to move. During the movement, the billet 7 is gradually clamped between the paired concave guide plates 13. Thus, during the process of conveying the billet 7 by the furnace inlet roller table 18, the concave guide plates 13 limit and guide the billet 7 and cooperate with the furnace inlet roller table 18 for synchronous conveying to prevent it from tipping over, and then send it into the heating furnace 4.

[0100] It can be understood that the output rotation speed of the driving device 15 is consistent with the rotation speed of the furnace inlet roller table 18 and is consistent with the conveying speed of the billet 7.

[0101] Preferably, the pulley 10 is driven to move on the slide rail 9 through the coupling 16.

[0102] Preferably, the billet 7 is guided by the flared opening 1301 of the concave guide plate 13 to quickly and accurately enter the concave guide plate 13. In this preferred solution, even if the center line of the concave guide plate 13 is not aligned with the upwardly curved billet 7, it can ensure that the concave guide plate 13 can be smoothly clamped into the billet 7.

[0103] Preferably, step b further includes: controlling the stop or movement of the frame through the driving device 15 according to whether the main beam 11 reaches the target position of the proximity switch 20 provided. For example, after the main beam moves to the proximity switch 20 located at the rear end of the furnace inlet roller table 18, the driving device 15 stops moving.

[0104] The furnace inlet roller table 18 and the driving device 15 are started synchronously. With the assistance of the concave guide plate 13, the billet 7 can be prevented from tipping over during the conveying process of the furnace inlet roller table 18. The auxiliary devices such as the frame move simultaneously with the billet 7. After the frame moves to the next proximity switch 20 located at the front end, the driving device 15 stops moving, and then the billet 7 is smoothly sent into the heating furnace.

[0105] In some preferred embodiments, in step b, after the billet 7 is clamped between the paired concave guide plates 13, it further includes:

[0106] b1: For the billet 7 above the target temperature, simultaneously shut down the driving device 15 and the furnace inlet roller table 18 to stop their movement, and then press down both ends of the billet 7 through the pressing mechanism 8, with the upper surface of the furnace inlet roller table 18 as the force-bearing surface, so as to quickly straighten the billet 7 on the furnace inlet roller table 18. After the straightening is completed, the pressing mechanism 8 retracts to make the billet 7 and the furnace inlet roller table 18 in a non-pressurized state (preferably retracting to a shortest vertical distance from the billet 7 of more than 20 mm); start the driving device 15 and the furnace inlet roller table 18 to make them move, so as to convey the billet 7 into the heating furnace 4;

[0107] b2: For the billet 7 below the target temperature, simultaneously shut down the driving device 15 and the furnace inlet roller table 18 to stop their movement, and then press down the pressing mechanism 8 to a shortest vertical distance from the billet 7 of less than 20 mm, which is used to inhibit the phenomenon that the two ends of the billet 7 swing a lot and cause severe jumping during the conveying process of the billet 7 on the furnace inlet roller table 18; start the driving device 15 and the furnace inlet roller table 18 to make them move, so as to convey the billet 7 into the heating furnace 4.

[0108] Those skilled in the art can select the above target temperature according to needs, for example, it can be 650 °C.

[0109] In some preferred embodiments, the conveying method further includes:

[0110] c: After the billet 7 enters the heating furnace 4, the inclined surface of the cantilever roller 1 induces the billet 7 to move towards the side of the retaining edge 5 of the cantilever roller 1, preventing the billet 7 from tipping over on the cantilever roller 1 and causing production accidents, especially when the billet 7 tips over and hits the moving beam 2 or the fixed beam 3 of the heating furnace, and the consequences are inestimable;

[0111] d: After the cantilever roller 1 stops, the pusher 6 steadily pushes the billet 7 horizontally to the fixed beam 3 of the heating furnace.

[0112] In order to prevent tipping during the process of pushing the billet 7 to the fixed beam 3 of the heating furnace, combined with the angle of the push rod, the billet 7 can be induced to tilt towards the direction of the push rod during the horizontal movement. Combined with the pushing force of the push rod, the billet 7 will not tip over, preventing the billet 7 from tipping over in the reverse direction, and steadily pushing the billet 7 to the fixed beam 3 of the heating furnace to complete the smooth conveying of the front end with jumping.

[0113] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A conveying system for crescent-shaped billets, characterized in that, it includes: A number of charging roller tables (18), which are located outside the furnace door of the heating furnace (4) and arranged side by side; A frame, which includes a number of main beams (11) and paired concave guide plates (13). The number of main beams (11) are respectively located on both sides outside the vertical direction of the number of charging roller tables (18). The paired concave guide plates (13) are located above the charging roller tables (18) and are arranged front and back along the conveying direction of the billet (7), and are used to limit the two ends of the crescent-shaped billet (7) and synchronously guide and convey it to prevent it from tipping over; Two slide rails (9), which are respectively located on both sides outside the vertical direction of the number of charging roller tables (18), and are arranged along the vertical direction of the number of charging roller tables (18); An outward-opening chute is provided on the side surface of the slide rail (9). A number of pulleys (10), which are installed in the chute and extend outward to be connected to the lower end of the main beam (11); A driving device (15), which is connected to the extended end of the pulley (10) and fixed on the main beam (11), and is used to drive the pulley (10) to move in the slide rail (9), and at the same time drive the frame to move synchronously with the conveying of the charging roller table (18).

2. The conveying system according to claim 1, characterized in that, the conveying system further includes: A pressing mechanism (8), which is installed on the frame and located above the concave guide plate (13), and is used to cooperate with the charging roller table (18) to straighten or limit the billet (7) in the concave guide plate (13).

3. The conveying system according to claim 2, characterized in that, the conveying system further includes: a temperature measuring instrument, which is arranged on any one of the concave guide plates (13) and is used to measure the temperature of the billet (7) to judge whether the pressing mechanism (8) performs a straightening operation or a limiting operation.

4. The conveying system according to claim 2, characterized in that, the pressing mechanism (8) corresponds to the concave guide plate (13) one by one; and the pressing mechanism (8) includes a lifting rod (801) and a pressing plate (802) connected to the lower end of the lifting rod (801). The lifting rod (801) is installed on the frame, and the pressing plate (802) is arranged horizontally.

5. The conveying system according to claim 1, characterized in that, the conveying system further includes: proximity switches (20), which are at least two and are respectively arranged at the front end and the rear end of the charging roller table (18), and are used to sense whether the main beam (11) reaches the corresponding position, so as to control the stop or movement of the frame; and / or, the driving device (15) is multiple and corresponds to the number of pulleys (10) one by one; and / or, the inlet end of the concave guide plate (13) is a flared opening (1301); and / or, the concave guide plate (13) is located at the center of the conveying surface of the charging roller table (18).

6. The conveying system according to claim 1, characterized in that, the conveying system further includes: A connecting shaft (14), one end of which is connected to the outer end of the pulley (10), and the other end passes through the corresponding main beam (11) on the same side and extends outward to be connected to the driving device (15); A bearing assembly (17) that rotatably connects the connecting shaft (14) to the corresponding main beam (11) on the same side; A coupling (16) that is installed at the other end of the connecting shaft (14) and is connected to the driving device (15).

7. The conveying system according to claim 1, characterized in that the conveying system further includes: A cantilever roller (1) located inside the heating furnace (4), with a baffle (5) extending vertically at its outer end, and the height of its inner end being flush with the height of the fixed beam (3) inside the heating furnace (4); A pusher (6) located outside the heating furnace (4) and arranged outside the outer end of the cantilever roller (1) for pushing the billet (7) located on the cantilever roller (1) onto the fixed beam (3) of the heating furnace to be fully heated in the middle of the heating furnace (4).

8. The conveying system according to claim 7, characterized in that the roller surface of the cantilever roller (1) slopes downward towards the direction close to the baffle (5), and the inclination angle is 3 - 7°, for inducing the billet (7) to move towards the outer end of the cantilever roller (1) to prevent it from tipping over; and the upper end of the baffle (5) is lower than half of the height of the billet (7) located on the cantilever roller (1); and the pusher (6) includes a push rod, and the outer end of the push rod slopes downward towards the direction close to the baffle (5), and the inclination angle is 10 - 15°, for preventing the billet (7) from tipping over during pushing to smoothly push the billet onto the fixed beam (3) of the heating furnace.

9. The conveying system according to claim 8, characterized in that the end of the fixed beam (3) of the heating furnace close to the pushing direction is provided with an arc angle to eliminate the blockage of the lateral movement of the billet (7).

10. A conveying method for crescent-shaped billets, characterized in that the conveying system according to any one of claims 1 - 9 is adopted, and the conveying method includes the following steps: a: The furnace inlet roller table (18) is in a stopped operating state, and the upwardly curved crescent-shaped billet (7) is hoisted onto the furnace inlet roller table (18); b: The driving device (15) and the furnace inlet roller table (18) are started simultaneously to drive the pulley (10) to move on the slide rail (9), the pulley (10) drives the main beam (11) and the rack to move. During the movement, the billet (7) gradually gets stuck between the paired concave guide plates (13). Thus, during the process of conveying the billet (7) along with the furnace inlet roller table (18), the concave guide plates (13) limit and guide the billet (7) and cooperate with the furnace inlet roller table (18) for synchronous conveying to prevent it from tipping over, and then it is fed into the heating furnace (4).

11. The conveying method for crescent-shaped billets according to claim 10, characterized in that step b further includes: controlling the rack to stop or move through the driving device (15) according to whether the main beam (11) reaches the target position of the proximity switch (20) set.

12. The conveying method according to claim 10, characterized in that In step b, after the billet (7) is clamped between the paired concave guide plates (13), it further includes: b1: For the billet (7) above the target temperature, simultaneously shut down the driving device (15) and the furnace inlet roller table (18) to stop their movement, and then simultaneously press down the two ends of the billet (7) through the pressing mechanism (8), with the upper surface of the furnace inlet roller table (18) as the force-receiving surface, so as to quickly straighten the billet (7) on the furnace inlet roller table (18). After the straightening is completed, the pressing mechanism (8) retracts so that the billet (7) and the furnace inlet roller table (18) are in a non-pressed state; start the driving device (15) and the furnace inlet roller table (18) to make them move, so as to convey the billet (7) into the heating furnace (4); b2: For the billet (7) below the target temperature, simultaneously shut down the driving device (15) and the furnace inlet roller table (18) to stop their movement, and then press down through the pressing mechanism (8) until the shortest vertical distance from the billet (7) is less than 20 mm, so as to suppress the phenomenon that the two ends of the billet (7) swing a large amount and cause severe jumping during the conveying process of the billet (7) on the furnace inlet roller table (18); start the driving device (15) and the furnace inlet roller table (18) to make them move, so as to convey the billet (7) into the heating furnace (4).

13. The conveying method according to claim 10, characterized in that, the conveying method further includes: c: After the billet (7) enters the heating furnace (4), the inclined surface of the cantilever roller (1) induces the billet (7) to move towards the baffle (5) side of the cantilever roller (1), preventing the billet (7) from tipping over on the upper side of the cantilever roller (1) and causing production accidents; d: After the cantilever roller (1) stops, the pusher (6) steadily pushes the billet (7) horizontally to the heating furnace fixed beam (3).

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