A slab entry positioning device

Abstract

The utility model relates to conveying positioning device technical field, the utility model provides a kind of billet into stove positioning device, including conveying table and centring subassembly;Conveying table is spaced apart with several conveying rollers along length direction;Centring subassembly is located at the feed end of conveying table, including fixed frame, limiting side plate and correction plate, fixed frame is at the feed end both sides of conveying table;Two limiting side plates are slidably arranged on fixed frame, so that the distance of billet both sides to the end of conveying roller is same;Correction plate is obliquely arranged on the side wall close to the feed end of conveying table towards the outside of limiting side plate, and correction plate is guided to billet by the guiding effect of inclined surface;After billet enters between two limiting side plates, two limiting side plates are synchronously close, so that the side wall of billet is attached to limiting side plate, and the distance of billet both sides to the end of conveying roller is equal.Synchronous centring adjustment of limiting side plate can ensure that billet is in the middle, and improve the stability of short billet conveying.

Description

Technical Field

[0001] This utility model relates to the technical field of conveying and positioning devices, specifically to a slab entry and positioning device for furnace. Background Technology

[0002] In the steel smelting and rolling production process, slabs, as intermediate products, need to be transported to the heating furnace via a conveyor to meet the stringent temperature requirements of subsequent rolling processes. The conveyor, connecting the slab storage area to the heating furnace, typically consists of multiple sets of conveyor rollers spaced apart along the conveying direction. Each set of conveyor rollers contains several horizontally arranged conveyor rollers. The synchronous rotation of these rollers drives the slab to move along a preset path, thus achieving continuous conveying operations.

[0003] However, during loading, when shorter slabs are placed on the conveyor platform, the distance between the two sides of the slab and the two sides of the conveyor platform is usually not equal. Due to the short length of the slab, even a small deviation can cause the slab to shift position during the conveying process, or even fall off the conveyor platform. This not only affects the continuity of production, but may also cause damage to the slab and safety hazards. At present, existing technologies focus more on the conveying of long slabs and lack effective positioning methods specifically for shorter slabs during the conveying process on the furnace loading platform. Utility Model Content

[0004] To overcome the above-mentioned defects, the present invention provides a slab positioning device for furnace entry, which solves the technical problem in the prior art that when a short slab is placed on the conveyor table, the distance between the two sides of the slab and the two sides of the conveyor table is usually not equal, which causes the slab to deviate or even fall during conveying.

[0005] According to one aspect, at least one embodiment of the present invention provides a slab furnace positioning device, comprising:

[0006] A conveyor table, wherein a plurality of conveyor rollers are provided on the conveyor table, and the plurality of conveyor rollers are arranged at intervals along the length direction of the conveyor table;

[0007] A centering assembly, disposed at the feed end of the conveyor table, is used to adjust the distance between the side edge of the slab and the side wall of the conveyor table. The centering assembly includes:

[0008] A fixing frame is located at the feed end of the conveyor table;

[0009] The limiting side plate has two sides, which are slidably disposed on the fixing frame and located on both sides of the fixing frame. The two limiting side plates can move closer to or further away from each other.

[0010] The correction plate has two plates, each corresponding to a limiting side plate. The correction plate is disposed on the side wall of the limiting side plate near the feeding end of the conveyor table and is inclined to the outside of the limiting side plate. The correction plate is used to guide the slab into the space between the two limiting side plates.

[0011] Optionally, the centering component further includes:

[0012] A pressure bar is vertically slidably mounted on the fixed frame and located on the side of the limiting side plate away from the correction plate. The pressure bar is used to limit the upper surface of the slab.

[0013] Optionally, the centering component further includes:

[0014] An electric actuator is mounted on the fixed frame, and a pressure rod is mounted on the movable end of the electric actuator. The electric actuator can drive the pressure rod to slide in the vertical direction so that the pressure rod presses against the slab.

[0015] Optionally, the centering component further includes:

[0016] An electric motor, which is mounted on the fixed frame;

[0017] A bidirectional lead screw is rotatably mounted on the fixed frame. One end of the bidirectional lead screw is located on the power output end of the motor. The bidirectional lead screw is located below the conveyor table. A threaded hole is provided on the limiting side plate. The limiting side plate is threadedly connected to the bidirectional lead screw through the threaded hole. The bidirectional lead screw is used to adjust the distance between the two limiting side plates.

[0018] Optionally, the centering component further includes:

[0019] A limiting slide bar is provided on the fixed frame and located below the conveyor table. The limiting side plate is slidably disposed on the limiting slide bar.

[0020] Optional, also includes:

[0021] A feeding platform is provided near the feeding end of the conveyor platform. The feeding platform is provided with a plurality of feeding rollers, which are arranged horizontally at intervals along the length direction. The conveyor roller and the feeding roller are arranged perpendicular to each other in the same horizontal plane, and the top of the feeding roller is flush with the top of the conveyor roller.

[0022] A pusher is located on the side of the loading platform away from the conveyor platform and directly opposite the feed end of the conveyor platform.

[0023] Optional, also includes:

[0024] A support frame is disposed on the side of the loading platform away from the conveyor platform.

[0025] A line marking instrument, which is mounted on the bracket.

[0026] Optionally, the scribing device is a laser scribing device.

[0027] Optionally, the loading platform and the conveyor platform are arranged in a T-shape.

[0028] Optionally, the pusher includes:

[0029] Base;

[0030] A hydraulic cylinder, which is mounted on the base;

[0031] A pusher plate is disposed at the movable end of the hydraulic cylinder and is used to push the slab from the feeding roller onto the conveying roller.

[0032] The beneficial effects of this utility model are as follows:

[0033] In this invention, when a short slab is moved from the feeding device to the feed end of the conveyor table, it first contacts two outwardly inclined correction plates. If the slab's position before entering the conveyor table is lower on the left and higher on the right, causing the right side of the slab to contact the conveyor roller first, the right correction plate will contact the right side wall of the slab first. Through the guiding effect of the inclined surface, the left and right sides of the slab are made parallel to the side wall of the conveyor table. Similarly, if the slab's position before entering the conveyor table is higher on the left and lower on the right, causing the left side of the slab to contact the conveyor roller first, the left correction plate will contact the left side of the slab first. After the slab enters between the two limiting side plates, according to the actual width of the slab, the driving mechanism drives the two limiting side plates to move closer synchronously until the two side walls of the slab are in contact with the limiting side plates. At this time, the distance from both sides of the slab to the end of the conveyor roller is equal. The synchronous centering adjustment of the limiting side plates can ensure that the slab is centered, which greatly improves the conveying stability of the short slab. The overall structure is simple and can be directly installed on the existing conveyor table, with low modification cost. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0035] Figure 1 This is a schematic diagram of the slab positioning device for furnace entry in one embodiment of the present invention;

[0036] Figure 2 for Figure 1 Top view of the slab furnace positioning device in the embodiment;

[0037] Figure 3 for Figure 1 A schematic diagram of the structure of the central component in the embodiment;

[0038] Figure 4 for Figure 1 The embodiment shows a structural diagram of the central component from another angle.

[0039] In the diagram: 1. Conveyor table; 2. Conveyor roller; 3. Centering assembly; 31. Fixing frame; 32. Limiting side plate; 3201. Threaded hole; 33. Correction plate; 34. Pressure rod; 35. Electric actuator; 36. Motor; 37. Bidirectional lead screw; 38. Limiting slide bar; 4. Loading platform; 5. Loading roller; 6. Pushing component; 61. Base; 62. Hydraulic cylinder; 63. Push plate; 7. Support; 8. Marking device. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0041] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0042] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] like Figures 1-4 As shown, this invention illustrates a slab loading and positioning device according to an embodiment of the present invention, comprising a conveying platform 1 and a centering assembly 3; the conveying platform 1 is provided with a plurality of conveying rollers 2 spaced apart along its length, the conveying rollers 2 being synchronously rotated by a drive motor; the centering assembly 3 is disposed at the feeding end of the conveying platform 1, and is used to adjust the distance between the two side walls of the slab and the two sides of the conveying platform 1, the centering assembly 3 comprising a fixing frame 31, limiting side plates 32 and a correction plate 33, the fixing frame 31 spanning across the two sides of the feeding end of the conveying platform 1; the two limiting side plates 32 and the correction plate 33 are respectively positioned at the feeding end of the conveying platform 1. The two limiting side plates 32 are slidably disposed on the fixed frame 31 and located on both sides of the fixed frame 31. The two limiting side plates 32 can move closer or further away from each other so that the distance from both sides of the slab to the end of the conveying roller 2 is the same. The correction plate 33 corresponds to the limiting side plate 32 one by one. The correction plate 33 is disposed on the side wall of the limiting side plate 32 near the feed end of the conveying table 1. The correction plate 33 is fixedly connected to the limiting side plate 32 by bolts and is inclined to the outside of the limiting side plate 32. The correction plate 33 is used to guide the slab into the space between the two limiting side plates 32.

[0047] It should be noted that when the short slab is transferred from the feeding device to the feeding end of the conveyor table 1, it first contacts the two outwardly inclined correction plates 33. If the slab's position before entering the conveyor table 1 is lower on the left and higher on the right, causing the right side of the slab to contact the conveyor roller 2 first, the right correction plate 33 will contact the right side wall of the slab first. Through the guiding effect of the inclined surface, the left and right sides of the slab will be parallel to the side wall of the conveyor table 1. Similarly, if the slab's position before entering the conveyor table 1 is higher on the left and lower on the right, causing the left side of the slab to contact the conveyor roller 2 first, the left correction plate 33 will contact the left side of the slab first. After the slab enters between the two limiting side plates 32, according to the actual width of the slab, the driving mechanism drives the two limiting side plates 32 to move synchronously closer along the slide rail until the two side walls of the slab are in contact with the limiting side plates 32. At this time, the distance from the two sides of the slab to the end of the conveyor roller 2 is equal. After the alignment is completed, the limiting side plates 32 remain in the same position, and the conveyor roller 2 starts to rotate, driving the slab to move towards the heating furnace along the length of the conveyor table 1.

[0048] The pre-guiding effect of the correction plate 33 can automatically correct the initial placement deviation of the slab; the synchronous centering adjustment of the limiting side plate 32 can ensure that the slab is centered, which greatly improves the stability of short slab conveying; the overall structure is simple and can be directly installed on the existing conveying table 1, with low modification cost.

[0049] For example, such as Figure 3 As shown, the centering assembly 3 also includes a pressure rod 34. The length of the pressure rod 34 is adapted to the width of the conveyor table 1, and it can slide vertically along the fixed frame 31. The pressure rod 34 is located on the side of the limiting side plate 32 away from the correction plate 33, and it presses against the slab after the slab is centered.

[0050] Specifically, after the slab is guided by the straightening plate 33 into the space between the limiting side plates 32 and centered, the pressure rod 34 slides downward under the action of the driving device until its bottom contacts the upper surface of the slab and applies appropriate pressure. During the movement of the slab driven by the conveying roller 2, the pressure rod 34 maintains vertical limitation on the slab, ensuring close contact between the slab and the conveying roller 2. When the front end of the slab is about to leave the range of action of the pressure rod 34, the pressure rod 34 slides upward to reset. Through the vertical limitation of the pressure rod 34, a comprehensive positioning constraint is formed in all directions, effectively suppressing the vertical movement and lateral offset of the slab during the positioning process, thus effectively controlling the positioning accuracy.

[0051] For example, such as Figure 3As shown, in some examples, the centering assembly 3 also includes an electric actuator 35, which drives the pressure rod 34. The electric actuator 35 is fixed to the side wall of the fixed frame 31, and its telescopic rod end is hinged to the connecting seat at the top of the pressure rod 34 via a pin. The electric actuator 35 is equipped with a stroke sensor, which can precisely control the lifting position of the pressure rod 34. The electric actuator 35 is electrically connected to the control system of the conveyor table 1 to achieve linkage control. After the slab completes centering by passing the limiting side plate 32, the control system receives the slab arrival signal and instructs the electric actuator 35 to extend its telescopic rod, causing the pressure rod 34 to descend at a uniform speed. When the bottom of the pressure rod 34 contacts the upper surface of the slab and reaches the preset pressure, the electric actuator 35 stops moving and maintains the pressure. Then, the control system instructs the electric actuator 35 to retract its telescopic rod, and the pressure rod 34 quickly rises to the initial position, waiting for the next slab.

[0052] The electric drive of the electric actuator 35 has higher control precision and response speed, and a wider pressure adjustment range, which can be adapted to slabs of different thicknesses. The addition of the stroke sensor enables precise control of the position of the pressure rod 34, avoiding over-pressing or under-pressing. After being linked with the control system, it realizes fully automatic operation, reduces manual intervention, and improves production efficiency.

[0053] For example, such as Figure 4 As shown, in some examples, the centering assembly 3 also includes a motor 36 and a bidirectional lead screw 37. The motor 36 is connected to the bidirectional lead screw 37 via a reducer and is mounted on a bracket 7 on one side of the fixed frame 31. The two ends of the bidirectional lead screw 37 have opposite threads and are horizontally mounted on the crossbeam at the bottom of the fixed frame 31 via bearing seats, located below the conveyor table 1 and perpendicular to the conveying direction. The bottom of the two limiting side plates 32 has threaded holes 3201, and the limiting side plates 32 are threadedly connected to the bidirectional lead screw 37 through the threaded holes 3201.

[0054] Specifically, based on the width of the slab to be conveyed, the operator adjusts the required spacing between the two limiting side plates 32 by controlling the movement. The motor 36 is started, and it drives the bidirectional lead screw 37 to rotate forward via a reducer. Because the threads at both ends rotate in opposite directions, the two limiting side plates 32 move synchronously towards the center along the lead screw until the preset spacing is reached, at which point the motor 36 stops. If there is still a slight deviation after the slab has entered between the limiting side plates 32, the motor 36 can be fine-tuned to ensure that both sides of the slab are in contact with the limiting side plates 32.

[0055] The bidirectional lead screw 37 transmission features high precision and high synchronization, ensuring that the two limit side plates 32 move completely the same distance, thus solving the problem of skewness caused by unilateral adjustment; the servo motor 36 drive enables digital adjustment of the spacing, adapting to slabs of different widths and significantly improving adjustment efficiency; the lead screw transmission has strong self-locking properties, eliminating the need for additional locking devices, simplifying the structure while ensuring stability after centering.

[0056] For example, such as Figure 4As shown, in some examples, the centering component 3 also includes a limiting slide bar 38. The limiting slide bar 38 is arranged parallel to the bidirectional lead screw 37, located on the side of the bidirectional lead screw 37 away from the conveyor table 1, and its two ends are connected to the fixing frame 31 through fixing seats. Sleeves are welded to one side of the nut seat at the bottom of the two limiting side plates 32, which are clearance-fitted with the limiting slide bar 38 to ensure smooth sliding. It should be noted that when the motor 36 drives the bidirectional lead screw 37 to rotate, the limiting side plates 32 move under the drive of the nut seats, and the bottom sleeves slide synchronously along the limiting slide bar 38. The limiting slide bar 38 constrains the limiting side plates 32, preventing them from deflecting or wobbling during movement due to the axial force of the bidirectional lead screw 37. When the slab contacts the limiting side plates 32, the limiting slide bar 38 can withstand lateral impact forces, preventing the limiting side plates 32 from tilting and ensuring centering accuracy.

[0057] For example, such as Figure 1 As shown, in some examples, the slab loading and positioning device also includes a loading platform 4 and a pusher 6; there is a gap between the loading platform 4 and the feeding end of the conveyor 1. Several loading rollers 5 are arranged at intervals along the length of the loading platform 4, perpendicular to the conveyor rollers 2, with their top height flush with the top of the conveyor rollers 2, and are driven to rotate by an independent motor. The pusher 6 is located on the side of the loading platform 4 away from the conveyor 1, directly opposite the feeding end of the conveyor 1, and its power output direction is perpendicular to the loading rollers 5.

[0058] Specifically, the slab is hoisted to the loading platform 4 by an overhead crane and placed on several loading rollers 5. The position of the slab in the length direction is adjusted by rotating the loading rollers 5. Then, the pusher 6 is activated, pushing the slab to move along the width direction of the loading platform 4. Since the loading rollers 5 are at the same height as the conveying rollers 2 and the spacing is small, the slab can smoothly transition to the feeding end of the conveying platform 1 and enter between the correction plates 33 of the centering assembly 3 for subsequent centering, positioning and conveying.

[0059] The cooperation between the loading platform 4 and the pusher 6 realizes the connection between the unloading and loading of the slab, replacing manual pushing and reducing labor intensity; the setting of the loading roller 5 reduces the frictional resistance when the slab moves, avoids scratches on the bottom of the slab, and facilitates the adjustment of the initial posture of the slab; the precise docking between the loading platform 4 and the conveyor 1 ensures that the slab can enter the centering component 3 smoothly, solving the problem of slab jamming during manual loading and improving loading efficiency.

[0060] For example, such as Figure 1 As shown, in some examples, a support 7 and a marking device 8 are also included. The support 7 is located on the side of the loading platform 4 away from the conveyor platform 1; the marking device 8 is located on the support 7.

[0061] The bracket 7 is fixed on the ground on the side of the loading platform 4 away from the conveyor platform 1, located on the side of the pusher 6. The scribing instrument 8 is installed on the crossbeam of the bracket 7, and its height is adjustable. The scribing instrument 8 projects a baseline line parallel to the length direction of the conveyor platform 1.

[0062] Specifically, after the slab is placed on the loading platform 4, the scribing device 8 is activated to project a straight reference line on one side of the slab. Based on this reference line, the operator or the automated control system adjusts the slab position by rotating the loading roller 5, aligning one side of the slab with the reference line to complete the initial positioning. Then, the pusher 6 pushes the slab towards the conveyor platform 1. Because the initial positioning has been completed, the deviation when the slab enters the centering assembly 3 is smaller, and the adjustment amount of the centering assembly 3 is reduced.

[0063] The scribing instrument 8 provides an intuitive positioning reference, enabling the slab to achieve preliminary centering during the loading stage, controlling the deviation when entering the centering component 3 within a small range, and shortening the centering time of the centering component 3; compared with traditional manual visual positioning, it improves accuracy.

[0064] For example, such as Figure 1 As shown, in some examples, the scribing device 8 is a laser scribing device 8. The laser scribing device 8 projects a narrow laser line with small straightness error, a wide operating temperature range, and is dustproof and waterproof. The laser scribing device 8 can be finely adjusted in the horizontal direction by adjusting the fine-tuning knob on the bracket 7 to ensure that the laser line is parallel to the conveyor table 1 in the same horizontal plane along its length.

[0065] After the slab is placed on the loading platform 4, the laser scribing machine 8 is turned on. Due to the high brightness and clear edges of the laser lines, they are clearly visible even in strong light conditions in the workshop. The operator observes whether the edge of the slab coincides with the laser line and drives the loading roller 5 to adjust the slab until one side of the slab coincides with the laser line.

[0066] The laser line of the laser scribing instrument 8 has high definition and high stability, which solves the problem of blurred baseline in complex workshop environments of traditional optical scribing instruments 8; the narrow laser line width further improves the initial positioning accuracy and optimizes the working efficiency of the centering component 3; its dustproof and waterproof performance is suitable for the harsh environment of steel workshops, with a long service life and low maintenance cost.

[0067] For example, such as Figure 2 As shown, in some examples, the loading platform 4 and the conveyor platform 1 are arranged in a T-shape. The conveyor platform 1 extends longitudinally, and the loading platform 4 is arranged transversely, with its midpoint in the length direction intersecting the center line of the feed end of the conveyor platform 1, forming a T-shaped structure. Baffles are provided at both ends of the loading platform 4 in the length direction to prevent the slab from slipping.

[0068] When the slab is hoisted to the loading platform 4, it can be placed from either end laterally. The rotation of the loading roller 5 moves the slab to the center position where it intersects with the conveyor platform 1. The pusher 6 pushes the slab longitudinally into the centering assembly 3 of the conveyor platform 1.

[0069] For example, such as Figure 1As shown, in some examples, the pusher 6 includes a base 61, a hydraulic cylinder 62, and a pusher plate 63; a steel plate is fixed on the base 61 for mounting the hydraulic cylinder 62. The hydraulic cylinder 62 is a double-acting hydraulic cylinder with large thrust and long stroke. After the slab is initially positioned on the loading platform 4, the piston rod of the hydraulic cylinder 62 extends, pushing the pusher plate 63 towards the conveyor platform 1. After the pusher plate 63 contacts the side of the slab, it pushes the slab along the loading roller 5 at a uniform speed. When the front end of the slab completely enters the centering assembly 3 of the conveyor platform 1, the piston rod of the hydraulic cylinder 62 drives the pusher plate 63 to reset, waiting for the next push.

[0070] The powerful thrust provided by the hydraulic cylinder 62 can easily push the heavy short slab blanks, solving the problem of insufficient thrust of mechanical pusher devices; the large area design of the pusher plate 63 ensures that the slab blank is subjected to uniform force and avoids skewing during the pushing process.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A slab positioning device for furnace entry, characterized in that, include: A conveyor platform (1) is provided with a plurality of conveyor rollers (2), and the plurality of conveyor rollers (2) are arranged at intervals along the length direction of the conveyor platform (1); A centering component (3) is disposed at the feed end of the conveyor table (1). The centering component (3) is used to adjust the distance between the side edge of the slab and the side wall of the conveyor table (1). The centering component (3) includes: A fixed frame (31) is located at the feed end of the conveyor table (1); Limiting side plate (32), there are two limiting side plates (32), the two limiting side plates (32) are respectively slidably disposed on the fixing frame (31) and located on both sides of the fixing frame (31), the two limiting side plates (32) can move closer to each other or further away from each other; The correction plate (33) has two plates, and the correction plate (33) corresponds one-to-one with the limiting side plate (32). The correction plate (33) is set on the side wall of the limiting side plate (32) near the feeding end of the conveying table (1) and is inclined to the outside of the limiting side plate (32). The correction plate (33) is used to guide the slab into the space between the two limiting side plates (32).

2. The slab positioning device for furnace entry according to claim 1, characterized in that, The centering component (3) also includes: The pressure rod (34) is vertically slidably disposed on the fixed frame (31) and located on the side of the limiting side plate (32) away from the correction plate (33). The pressure rod (34) is used to limit the upper surface of the slab.

3. The slab positioning device for furnace entry according to claim 2, characterized in that, The centering component (3) also includes: An electric push rod (35) is mounted on the fixed frame (31), and a pressure rod (34) is mounted on the movable end of the electric push rod (35). The electric push rod (35) can drive the pressure rod (34) to slide in the vertical direction so that the pressure rod (34) presses against the blank.

4. The slab positioning device for furnace entry according to claim 3, characterized in that, The centering component (3) also includes: Motor (36), said motor (36) is mounted on said fixing frame (31); A bidirectional lead screw (37) is rotatably mounted on the fixed frame (31). One end of the bidirectional lead screw (37) is located on the power output end of the motor (36). The bidirectional lead screw (37) is located below the conveyor table (1). A threaded hole (3201) is provided on the limiting side plate (32). The limiting side plate (32) is threadedly connected to the bidirectional lead screw (37) through the threaded hole (3201). The bidirectional lead screw (37) is used to adjust the distance between the two limiting side plates (32).

5. A slab positioning device for furnace entry according to claim 4, characterized in that, The centering component (3) also includes: A limiting slide bar (38) is provided on the fixed frame (31) and the limiting slide bar (38) is located below the conveyor table (1). The limiting side plate (32) is slidably provided on the limiting slide bar (38).

6. The slab positioning device for furnace entry according to claim 1, characterized in that, Also includes: The loading platform (4) is located near the feeding end of the conveyor platform (1). The loading platform (4) is provided with a plurality of loading rollers (5). The plurality of loading rollers (5) are arranged horizontally at intervals along the length direction. The conveyor roller (2) and the loading rollers (5) are arranged perpendicularly to each other in the same horizontal plane, and the top of the loading rollers (5) is flush with the top of the conveyor rollers (2). The pusher (6) is located on the side of the loading platform (4) away from the conveyor platform (1) and is directly opposite the feeding end of the conveyor platform (1).

7. A slab positioning device for furnace entry according to claim 6, characterized in that, Also includes: A support (7) is provided on the side of the loading platform (4) away from the conveyor platform (1); A marking instrument (8) is mounted on the bracket (7).

8. A slab positioning device for furnace entry according to claim 7, characterized in that, The scribing instrument (8) is a laser scribing instrument.

9. A slab positioning device for furnace entry according to claim 8, characterized in that, The loading platform (4) and the conveying platform (1) are arranged in a T-shape.

10. A slab positioning device for furnace entry according to claim 6, characterized in that, The pusher (6) includes: Base (61); A hydraulic cylinder (62) is mounted on the base (61); Push plate (63), which is located at the movable end of the hydraulic cylinder (62), is used to push the slab from the feeding roller (5) onto the conveying roller (2).

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