A large-diameter hot-rolled metal pipe blank transportation system and a working method thereof

Abstract

This invention discloses a large-diameter hot-rolled metal billet transportation system and its working method, belonging to the field of large-diameter hot-rolled steel pipe production technology. It includes an X-axis transportation line, a Y-axis transportation line, and an integrated transmission mechanism at their intersection. The X-axis transportation line consists of a transportation roller conveyor, a transverse conveying mechanism, a centralized transmission roller conveyor, a first material feeding assembly, a collection platform, and a lifting baffle assembly, realizing the reception and aggregation of multiple incoming materials. The Y-axis transportation line consists of a loading platform, a loading and feeding assembly, a first conveyor chain, and a second material feeding assembly, realizing the reception of materials from the gantry crane. After the two billet streams converge at the integrated transmission mechanism, they are sequentially fed into a lifting mechanism, a billet transfer mechanism, and a weighing mechanism via the second conveyor chain, completing height lifting, direction adjustment, and weighing before entering the next process. This invention achieves automatic continuous transportation of billets between processes, improving production efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of large-diameter hot-rolled steel pipe production technology, specifically to a large-diameter hot-rolled metal billet transportation system and its working method. Background Technology

[0002] The production process of large-diameter hot-rolled seamless steel pipes typically involves multiple steps. Between these steps, the billet needs to be transferred multiple times. Currently, billet transportation mainly relies on gantry cranes in conjunction with manual labor to complete the hoisting operations between workstations. However, for typical large-diameter hot-rolled seamless steel pipe billets, which are characterized by heavy weight per meter, a small length-to-diameter ratio, and limited cross-sectional roundness, the aforementioned gantry crane-based transportation method has several shortcomings: First, within the narrow, intersecting operating space, the reversing transport and multi-station transfer of tube blanks are difficult to achieve using traditional equipment, necessitating repeated lifting by gantry cranes. However, gantry crane lifting is an intermittent operation with long single lifting cycles, making it difficult to match the rhythm of continuous production and severely restricting the overall efficiency of the production line. Furthermore, due to the large weight and smooth surface of the tube blanks, there are safety hazards such as disengagement and swaying during lifting, threatening the personal safety of operators. In addition, when large-diameter tube blanks roll on the inclined platform under their own weight, they often roll poorly due to insufficient cross-sectional roundness, resulting in huge impact forces when they reach the downstream receiving equipment, easily causing equipment damage. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a large-diameter hot-rolled metal billet transportation system and its working method, aiming to solve the technical problems of low efficiency, high safety risks, large impact, and poor spatial adaptability of the existing gantry crane transportation method, realize the automatic, continuous, and stable transportation of billets between various processes, improve production efficiency and safety, and reduce manual labor intensity.

[0004] The technical solution of the present invention is as follows: In a first aspect of the invention, a large-diameter hot-rolled metal billet transport system is provided, comprising an X-direction transport line, a Y-direction transport line, and an integrated transport mechanism disposed at the intersection of the two lines. The X-direction transport line includes several transport roller conveyors. A transverse conveying mechanism is provided downstream of the several transport roller conveyors. A centralized drive roller conveyor is provided downstream of the transverse conveying mechanism. A first material feeding assembly is provided in the middle of the centralized drive roller conveyor. A collection platform is provided on the side of the centralized drive roller conveyor. The integrated transmission mechanism is provided downstream of the centralized drive roller conveyor. A lifting baffle assembly is provided between the centralized drive roller conveyor and the integrated transmission mechanism. The Y-direction transport line includes a loading platform, a loading and unloading assembly, a first conveyor chain, and a second unloading assembly arranged sequentially along the billet transport direction. The downstream of the second unloading assembly is connected to an integrated transmission mechanism. The downstream of the integrated transmission mechanism is provided with a second conveyor chain. The downstream of the second conveyor chain is provided with a lifting mechanism, a billet transfer mechanism, and a weighing mechanism in sequence. The centralized transmission roller conveyor transports the tube blank to the integrated transmission mechanism in a direction parallel to the tube blank axis, and the second material feeding assembly transports the tube blank to the integrated transmission mechanism in a direction perpendicular to the tube blank axis.

[0005] In some embodiments of the present invention, the plurality of transport rollers are arranged on one side of the transverse conveying mechanism, and a positioning baffle is provided on the other side of the transverse conveying structure; The transport direction of the plurality of transport rollers for the tube blank is set to be parallel to the axis of the tube blank, and the transport direction of the transverse conveying mechanism for the tube blank is set to be perpendicular to the axis of the tube blank. The collecting platform is arranged on the side of the centralized transmission roller conveyor along the direction perpendicular to the axis of the tube blank. The first feeding assembly moves the tube blank to the collecting platform along the direction perpendicular to the axis of the tube blank. The collecting platform is provided with a buffer baffle on the side away from the centralized transmission roller conveyor along the direction perpendicular to the axis of the tube blank.

[0006] In some embodiments of the present invention, the transverse conveying mechanism includes a track base, a transverse distribution vehicle, and a distribution vehicle buffer unit; a track is laid on the track base, the transverse distribution vehicle is disposed on the track and moves back and forth along the track, the distribution vehicle buffer unit is disposed at both ends of the track base, and a roller conveyor for conveying tube blanks is provided on the top of the transverse distribution vehicle.

[0007] In some embodiments of the present invention, the lifting baffle assembly includes a baffle base, a baffle arm, a billet buffer unit, and a baffle driving unit. The base of the baffle driving unit is hinged to the baffle base, and the output end of the baffle driving unit is hinged to the baffle arm. The baffle arm is disposed on the upper part of the baffle base, and the baffle driving unit drives the baffle arm to swing around the hinge point, moving closer to or away from the baffle base. The billet buffer unit is disposed on the side of the baffle arm facing the billet feeding direction.

[0008] In some embodiments of the present invention, the loading platform is provided with a loading platform surface, the receiving surface of the loading platform surface that receives the billet is configured as a V-shaped structure combining a plane and an inclined plane, a first transition inclined platform is provided downstream of the loading platform surface, the first transition inclined platform is inclined downward along the Y direction, and the loading and unloading assembly is provided at the bottom of the loading platform frame. The feeding and feeding assembly includes a first feeding arm, a first synchronous shaft, and a first drive unit. The first feeding arm is mounted on the first synchronous shaft, and the first drive unit drives the first synchronous shaft to rotate. The end of the first feeding arm near the tube blank is provided with multiple rollers. The first feeding arm pushes the tube blank from the feeding table into the first transition ramp. A first conveyor chain is provided downstream of the first transition ramp, and a second feeding assembly is provided downstream of the first conveyor chain.

[0009] In some embodiments of the present invention, the integrated transmission mechanism includes a mounting base, a transmission roller conveyor, a second transition ramp, a second feeding arm, a second synchronous shaft, and a second drive unit. The conveyor roller is mounted on the mounting base. One end of the conveyor roller extends along the X-direction transport line and corresponds to the centralized drive roller. A second transition ramp is provided downstream of the conveyor roller along the Y-direction transport line. The second transition ramp is inclined downward along the Y-direction transport line. The conveyor roller conveyor is provided with a plurality of V-shaped rollers spaced at a predetermined distance along the X-direction transport line. Guide plates are provided at both ends of the plurality of V-shaped rollers spaced at a predetermined distance along the Y-direction transport line. Two of the guide plates are respectively positioned above the ends of the V-shaped rollers. The top surface of the guide plate near the second transition ramp is flush with the top surface of the second transition ramp. The top surface of the guide plate near the Y-direction transport line has a downward slope, which satisfies the rolling of the blank along the Y-direction. Furthermore, the top surface of the guide plate near the Y-direction transport line is higher than the initial position of the roller conveyor bearing seat and the second feeding arm of the conveyor roller conveyor. A second conveyor chain is provided downstream of the second transition ramp, and a third material feeding assembly is provided downstream of the second conveyor chain. The second synchronous shaft is located below the conveyor roller and is rotatably mounted on the mounting base. The second feeding arm is fixed on the second synchronous shaft. The second drive unit drives the second synchronous shaft to rotate. The end of the second feeding arm near the tube blank is provided with multiple rollers.

[0010] In some embodiments of the present invention, the lifting mechanism is disposed at the end of the second conveyor chain, a transition platform is disposed downstream of the lifting mechanism, a fourth material feeding assembly is disposed downstream of the transition platform, and a blank transfer mechanism is disposed downstream of the fourth material feeding assembly. The lifting mechanism includes a receiving platform and lifting claws. The receiving platform is located at the outlet of the second conveyor chain and receives the tube blank sent by the second conveyor chain. The lifting claws are located on the side of the receiving platform and lift the tube blank from the receiving platform to the transition platform.

[0011] In some embodiments of the present invention, the billet transfer mechanism is disposed between the lifting mechanism and the weighing mechanism. The billet transfer mechanism includes a steering conveyor roller conveyor, which is inclined downward. A fifth material feeding assembly is disposed downstream of the steering conveyor roller conveyor, a material storage platform is disposed downstream of the fifth material feeding assembly, and a weighing mechanism is disposed downstream of the material storage platform. The turning conveyor rollers and the lifting mechanism have a preset horizontal angle, which is configured to be set according to the feeding direction of the heating furnace set in the downstream station, so that the billet enters the heating furnace after turning.

[0012] In some embodiments of the present invention, the weighing mechanism includes a weighing base, a weighing component, a buffer receiving platform, and a buffer receiving drive unit. The weighing base is located near the billet transfer mechanism. A third drive unit is provided on the weighing base. The output end of the third drive unit is connected to the claw spindle. The claw spindle is connected to the feeding claw. The feeding claw swings under the drive of the third drive unit. A weighing assembly is provided downstream of the weighing base, a weighing roller conveyor is provided above the weighing assembly, a buffer receiving platform is provided downstream of the weighing roller conveyor, and an upwardly extending arc-shaped receiving surface is provided on the side of the buffer receiving platform facing the tube blank. The output end of the buffer receiving drive unit is connected to the buffer receiving platform and drives the buffer receiving platform to rise and fall. A safety baffle is provided at one end of the weighing roller conveyor along the axial direction of the tube blank.

[0013] In a second aspect of the invention, a method for operating a large-diameter hot-rolled metal billet transport system is provided, comprising: On the X-axis transport line, multiple tube blanks are simultaneously transported to the transverse conveyor mechanism along several transport roller conveyors in a direction parallel to the tube blank axis. The transverse conveyor mechanism collects the tube blanks in a direction perpendicular to the tube blank axis and then transfers the multiple tube blanks to the centralized drive roller conveyor. The centralized drive roller conveyor transports the tube blanks downstream in a direction parallel to the tube blank axis. When the tube blank has no subsequent processing steps, the first material feeding assembly feeds the tube blank into the collection table in a direction perpendicular to the tube blank axis. When the tube blank has subsequent processing steps, it is positioned by the lifting baffle assembly and continues to be transported along the centralized drive roller conveyor to the integrated transmission mechanism. On the Y-axis transport line, the tube blank is placed on the loading platform of the loading platform. The loading and feeding assembly feeds the tube blank from the loading platform into the first transition ramp. The tube blank rolls along the first transition ramp to the first conveyor chain. The first conveyor chain transports the tube blank to the second feeding assembly. The second feeding assembly feeds the tube blank into the conveyor roller conveyor of the integrated conveyor mechanism in a direction perpendicular to the tube blank axis. The tube blank gradually reduces its shaking between the two guide plates of the conveyor roller conveyor and then becomes stable. The integrated conveying mechanism brings together the tube blanks from the X-axis conveyor line and the Y-axis conveyor line on the conveying roller table. The second feeding arm feeds the tube blanks on the conveying roller table into the second transition ramp. The tube blanks enter the second conveying chain along the second transition ramp. The second conveying chain transports the tube blanks downstream. The third feeding assembly feeds the tube blank from the end of the second conveyor chain into the receiving platform of the lifting mechanism, and the lifting claw lifts the tube blank from the receiving platform to the transition platform; the fourth feeding assembly feeds the tube blank from the transition platform into the billet transfer mechanism, and the billet transfer mechanism makes the tube blank roll on the turning conveyor roller to adjust the conveying direction; the fifth feeding assembly feeds the tube blank from the billet transfer mechanism into the storage platform. The feeding claw of the weighing mechanism picks up a single piece of material from the storage platform, causing the tube blank to roll into the weighing mechanism. The buffer receiving platform rises, causing the arc-shaped receiving surface to come into contact with the tube blank for buffering. The tube blank then moves onto the weighing roller conveyor, where the weighing assembly weighs the tube blank. After weighing, the buffer receiving platform descends, and the weighing roller conveyor outputs the tube blank to the next process.

[0014] One or more technical solutions of the present invention have the following beneficial effects: By employing an integrated transmission mechanism in conjunction with X-axis and Y-axis transport lines, the traditional intermittent hoisting mode of gantry cranes has been replaced. The X-axis transport line automatically receives and aggregates multiple incoming materials through transport roller conveyors, lateral conveyor mechanisms, and centralized drive roller conveyors. The Y-axis transport line automatically receives materials from gantry cranes through a loading platform, loading and unloading components, and a first conveyor chain. The two streams of billets converge at the integrated transmission mechanism and are then continuously transported downstream via a second conveyor chain. The entire process requires no intervention from gantry cranes, solving the problems of long hoisting cycles and inability to match continuous production rhythms, and significantly improving the overall efficiency of the production line.

[0015] Multiple buffer and impact-reducing structures eliminate safety hazards during hoisting operations. The loading platform adopts a zigzag design combining flat and inclined sections. After the billet is stably lowered into the flat section, it is then guided into the inclined section by the first feeding arm, preventing the billet from falling directly from a height. The front end of the first feeding arm is equipped with a roller structure, which creates rolling friction with the billet during the feeding process. Combined with the adjustable speed of the first drive unit, the billet enters the downstream equipment at an appropriate speed. Multiple sets of first feeding arms along the billet axis act simultaneously, correcting the material position during the pushing process and effectively reducing the impact on the first conveyor chain. The lifting baffle assembly has a billet buffer unit on its baffle arm, which absorbs and transfers the impact force of the billet collision to the baffle base. In the weighing mechanism, the buffer receiving platform first receives the billet and then the buffer receiving drive unit slowly lowers it onto the weighing roller conveyor. A safety baffle is installed at the end of the weighing roller conveyor, completely eliminating the risk of impact damage to the weighing sensor caused by the billet.

[0016] The integrated transmission mechanism solves the problem of reversing transport in narrow, intersecting spaces. The integrated transmission mechanism mounts the second feeding arm and the second synchronous shaft on a base below the transmission roller conveyor. A second drive unit drives the second feeding arm to swing, merging the tube blanks from the X-axis centralized transmission roller conveyor and the Y-axis second feeding assembly on the transmission roller conveyor and feeding them into the second transition ramp, thus achieving reversing in narrow spaces. Furthermore, this integrated transmission mechanism extends the Y-axis receiving length of the transmission roller conveyor with guide plates and installs multiple sets of second feeding arms in the gap between the transmission roller conveyor and the base, making efficient use of three-dimensional space to complete X and Y-axis material feeding on a single device.

[0017] The turning conveyor roller of the billet turning mechanism is equipped with a V-shaped groove. The billet automatically adjusts its axial direction during the rolling process to match the feeding angle of the downstream heating furnace, without requiring additional operating space. Attached Figure Description

[0018] Figure 1 This is a plan view of a large-diameter hot-rolled metal billet transportation system provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the transverse conveying mechanism provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the lifting baffle assembly provided in Embodiment 1 of the present invention; Figure 4 This is a side view of the Y-direction transportation line provided in Embodiment 1 of the present invention; Figure 5 The present invention provided in Embodiment 1 Figure 4 Enlarged schematic diagram of the feeding and feeding assembly; Figure 6 The present invention provided in Embodiment 1 Figure 4 Enlarged schematic diagram of the lifting mechanism section; Figure 7 The present invention provided in Embodiment 1 Figure 4 An enlarged schematic diagram of the weighing mechanism.

[0019] In the diagram: 1. Transport roller conveyor; 2. Lateral conveyor mechanism; 3. Centralized drive roller conveyor; 4. First material feeding assembly; 5. Collection platform; 6. Buffer baffle; 7. Positioning baffle; 8. Loading platform; 9. Loading and feeding assembly; 10. First conveyor chain; 11. Second material feeding assembly; 12. Integrated transmission mechanism; 13. Second conveyor chain; 14. Third material feeding assembly; 15. Lifting mechanism; 16. Transition platform; 17. Fourth material feeding assembly; 18. Billet transfer mechanism; 19. Fifth material feeding assembly; 20. Storage platform; 21. Weighing mechanism; 22. Safety baffle; 23. Lateral distribution vehicle; 24. Distribution vehicle buffer unit; 25. Track base; 26. Lifting baffle assembly; 27. Baffle arm; 28. Billet buffer unit; 29. ​​Baffle base; 30. Baffle drive unit. 31. Feeding platform; 32. First feeding arm; 33. First synchronous shaft; 34. First drive unit; 35. First transition ramp; 36. Second feeding arm; 37. Second synchronous shaft; 38. Mounting base; 39. Second drive unit; 40. Guide plate; 41. Conveyor roller conveyor; 42. Second transition ramp; 43. Feeding claw; 44. Third drive unit; 45. Weighing base; 46. Claw spindle; 47. Weighing roller conveyor; 48. Weighing assembly; 49. Buffer receiving drive unit; 50. Buffer receiving platform. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Example 1 In a typical embodiment of the present invention, such as Figure 1 As shown, this embodiment provides a large-diameter hot-rolled metal tube billet transportation system for automatically and continuously transporting large-diameter metal tube billets with a diameter greater than 800 mm and a single meter weight of more than 5 tons between various production processes.

[0022] The system includes an X-axis transport line, a Y-axis transport line, and an integrated transmission mechanism 12 at the intersection of the two lines. The X-axis transport line is used to receive multiple streams of material from the front sawing process, and the Y-axis transport line is used to receive single batches of tube blanks transferred from other workstations by a gantry crane. The two transport lines merge at the integrated transmission mechanism 12 and then enter the subsequent process.

[0023] The X-axis transport line includes several transport roller conveyors 1, which are arranged side by side to receive multi-stream tube blanks from the preceding production process. Each transport roller conveyor 1 can independently transport tube blanks, and multiple tube blanks move synchronously on their respective roller conveyors in a direction parallel to the tube blank axis, realizing the simultaneous reception of multiple streams of material.

[0024] Downstream of several transport roller conveyors 1, a transverse conveyor mechanism 2 is provided. The transverse conveyor mechanism 2 is arranged perpendicular to the axis of the tube blank. Its function is to collect and aggregate the tube blanks from multiple parallel roller conveyors and transfer them laterally to the downstream centralized drive roller conveyor 3. The transverse conveyor mechanism 2 solves the problem that multiple streams of incoming material cannot be directly merged into a single main roller conveyor in a narrow space.

[0025] Downstream of the transverse conveyor mechanism 2, a centralized drive roller conveyor 3 is provided. The centralized drive roller conveyor 3 extends in a direction parallel to the axis of the tube blank, continuing to transport the tube blank from the transverse conveyor mechanism 2 downstream. The centralized drive roller conveyor 3 is the main channel of the X-axis transport line, and its length is determined according to the production line layout.

[0026] The central drive roller conveyor 3 is provided with a first material feeding component 4 in the middle. The first material feeding component 4 is arranged in the roller gap of the central drive roller conveyor 3. Its claws can swing upward under the drive of the drive mechanism to push the tube blank on the roller conveyor away from the main roller conveyor in a direction perpendicular to the tube blank axis.

[0027] A collection platform 5 is provided on the side of the centralized transmission roller conveyor 3. The collection platform 5 is located on the side of the first material feeding assembly 4 in the feeding direction and is used to receive and stack tube blanks that do not have subsequent processing steps. When the tube blank fails the inspection or does not need to enter the next process, the first material feeding assembly 4 feeds it into the collection platform 5 for temporary storage.

[0028] A buffer baffle 6 is provided on the side of the collecting platform 5 away from the centralized drive roller conveyor 3 along the direction perpendicular to the tube blank axis. The buffer baffle 6 is equipped with an elastic buffer element. When the tube blank is pushed into the collecting platform 5 and rolls to this side, the buffer baffle 6 decelerates and limits it to prevent the tube blank from rushing out of the collecting platform 5 and causing a safety accident, and to meet the requirement of stable material stopping for large tube blanks.

[0029] A positioning baffle 7 is provided on the opposite side of the transverse conveying mechanism 2. The positioning baffle 7 is located on one side of the transverse conveying mechanism 2, at the end position of the transport roller 1. When the transport roller 1 drives the tube blank to the position, the end of the tube blank touches the positioning baffle 7 to achieve axial positioning, ensuring that the starting position of the tube blank on the transverse conveying mechanism 2 of the centralized drive roller 3 is accurate.

[0030] The transverse conveying mechanism 2 includes a track base 25, a transverse distribution car 23, and a distribution car buffer unit 24. The track base 25 is fixed to the ground foundation, and a track is laid on top of it. The track extends in a direction perpendicular to the axis of the tube blank, and the length of the track covers the travel range from multiple transport roller conveyors 1 to the centralized drive roller conveyor 3.

[0031] The transverse distribution car 23 is mounted on a track and moves back and forth along the track. A roller conveyor for transporting the tube blank is located on the top of the transverse distribution car 23. When the transverse distribution car 23 moves to a position where it connects with a certain transport roller conveyor 1, the transport roller conveyor 1 transports the tube blank onto the roller conveyor of the transverse distribution car 23. After the tube blank stops, the transverse distribution car 23 moves along the track to a position where it connects with the centralized drive roller conveyor 3. The roller conveyor on the top of the transverse distribution car 23 then starts, transporting the tube blank onto the centralized drive roller conveyor 3.

[0032] The distribution car buffer unit 24 is disposed at both ends of the track base 25. The distribution car buffer unit 24 includes a hydraulic buffer and a limit block. When the lateral distribution car 23 moves to the end of the track, the buffer absorbs the inertial impact of the lateral distribution car 23 and prevents the lateral distribution car 23 from rushing off the track. The limit block acts as a mechanical limit to ensure that the stopping position of the lateral distribution car 23 is accurate.

[0033] The transverse conveyor mechanism 2 enables centralized collection and unified transfer of multiple incoming materials within the same time period. Multiple tube blanks can enter the transverse distribution car 23 from different transport rollers 1. The transverse distribution car 23 moves between multiple docking positions, receiving tube blanks from each roller one by one, and then centrally transfers them to the centralized drive roller 3, thus meeting the matching requirements of multi-line production rhythm.

[0034] Downstream of the centralized drive roller conveyor 3, an integrated transmission mechanism 12 is provided. The centralized drive roller conveyor 3 transports the tube blank to the transmission roller conveyor 41 of the integrated transmission mechanism 12 along a direction parallel to the tube blank axis. The integrated transmission mechanism 12 is the junction of the X-direction transport line and the Y-direction transport line.

[0035] A lifting baffle assembly 26 is provided between the centralized drive roller conveyor 3 and the integrated transmission mechanism 12. The lifting baffle assembly 26 is used to accurately position the tube blank on the centralized drive roller conveyor 3 and control the tube blank to stop at a preset working position before entering the integrated transmission mechanism 12, in coordination with the subsequent material feeding sequence.

[0036] The lifting baffle assembly 26 includes a baffle base 29, a baffle arm 27, a billet buffer unit 28, and a baffle drive unit 30. The base of the baffle drive unit 30 is hinged to the baffle base 29, and the output end of the baffle drive unit 30 is hinged to the baffle arm 27, which is located on the upper part of the baffle base 29. The baffle drive unit 30 drives the baffle arm 27 to swing around the hinge point, causing the baffle arm 27 to move closer to or further away from the baffle base 29. The billet buffer unit 28 is located on the side of the baffle arm 27 facing the billet infeed direction. When the billet collides with the billet buffer unit 28, the impact force is buffered and absorbed, while the baffle arm 27 transmits the mechanical impact to the ground foundation through the baffle base 29. The billet buffer unit 28 utilizes the extended buffer time to achieve safe stopping and accurate positioning of large billets.

[0037] The Y-direction transport line includes a loading platform 8, a loading and unloading assembly 9, a first conveyor chain 10, and a second unloading assembly 11, arranged sequentially along the billet transport direction. The Y-direction transport line is used to receive billets hoisted from other workstations or storage areas by a gantry crane.

[0038] The loading platform 8 is equipped with a loading platform 31, the receiving surface of which is a V-shaped structure combining a flat surface and an inclined surface. The flat section is used to receive the tube blank placed by the gantry, keeping the tube blank stable during unloading. The inclined section smoothly connects with the flat section, and the tube blank rolls downwards under its own weight after entering the inclined section under the action of the feeding assembly. This folded surface design of the loading platform 31 avoids the violent impact and rolling loss of control caused by the tube blank falling directly from the gantry onto the inclined surface.

[0039] Downstream of the loading platform 31, a first transition ramp 35 is provided. The first transition ramp 35 is inclined downward along the Y direction, and its slope angle is determined according to the diameter and weight per meter of the tube blank to ensure that the tube blank can roll smoothly under its own weight without jamming. The upper end of the first transition ramp 35 is connected to the end of the inclined section of the loading platform 31, and the lower end is smoothly connected to the chain surface of the first conveyor chain 10.

[0040] The feeding and feeding assembly 9 is located at the bottom of the feeding platform 8. The assembly includes a first feeding arm 32, a first synchronous shaft 33, and a first drive unit 34. The first feeding arm 32 is mounted on the first synchronous shaft 33, and the first drive unit 34 drives the first synchronous shaft 33 to rotate. Multiple rollers are provided at the end of the first feeding arm 32 near the tube blank, and these rollers form rolling contact with the surface of the tube blank. The first feeding arm 32 swings upward through the gap between the feeding platform 8 and the first conveyor chain 10, propelling the tube blank from the flat section of the feeding platform 31 into the inclined section. The roller structure transforms the sliding friction between the feeding arm and the tube blank into rolling friction, reducing energy loss and scratches on the tube blank surface during the feeding process.

[0041] Downstream of the first transition ramp 35, there is a first conveyor chain 10. The first conveyor chain 10 is a transverse chain bed structure with its chain surface arranged horizontally. It is used to receive the tube blank rolling down from the first transition ramp 35 and convey it forward. The width of the chain surface of the first conveyor chain 10 is adapted to the length of the tube blank to ensure that the tube blank remains stable during the conveying process.

[0042] A second feeding assembly 11 is located downstream of the first conveyor chain 10. The second feeding assembly 11 is positioned at the end of the first conveyor chain 10 and is arranged perpendicular to the tube blank axis. The structure of the second feeding assembly 11 is similar to that of the feeding assembly 9, including a feeding arm, a synchronous shaft, and a drive unit. A roller is provided at the front end of the feeding arm. The second feeding assembly 11 feeds the tube blank into the uphill section of the guide plate 40 of the integrated transmission mechanism 12 along a direction perpendicular to the tube blank axis.

[0043] Downstream of the integrated conveying mechanism 12, a second conveying chain 13 is provided. The second conveying chain 13 receives the tube blank from the integrated conveying mechanism 12 and continues to transport it downstream. The second conveying chain 13 is a transverse chain bed structure, and its transport direction is parallel to that of the first conveying chain 10.

[0044] Downstream of the second conveyor chain 13 are a lifting mechanism 15, a billet transfer mechanism 18, and a weighing mechanism 21, which respectively complete the height lifting, direction adjustment, and weighing of the billet to prepare it for entering the heating furnace.

[0045] The centralized drive roller conveyor 3 transports the tube blank to the integrated transmission mechanism 12 along a direction parallel to the tube blank axis, while the second material feeding assembly 11 transports the tube blank to the integrated transmission mechanism 12 along a direction perpendicular to the tube blank axis. The tube blanks from the two lines cross and merge at the integrated transmission mechanism 12, solving the problem of reversing the transport of large-diameter tube blanks in narrow spaces with cross-sectional and cross-sectional directions.

[0046] The loading platform 31 of the loading platform 8 adopts a V-shaped structure combining a flat surface and an inclined surface. When the tube blank is placed on the flat section of the loading platform 31 by the gantry crane, it is in a stable and stationary state. After the loading and unloading assembly 9 is started, the first drive unit 34 drives the first unloading arm 32 to swing through the first synchronous shaft 33. The roller at the front end of the first unloading arm 32 abuts against the lower surface of the tube blank, pushing the tube blank from the flat section to the inclined section. After the tube blank crosses the junction of the flat section and the inclined section, it accelerates and rolls down the inclined section under its own weight. The swing speed of the first drive unit 34 controls the initial rolling speed of the tube blank, so that the tube blank enters the first transition inclined platform 35 at a set speed. The tube blank continues to roll along the first transition inclined platform 35 to the chain surface of the first conveyor chain 10, where the first conveyor chain 10 picks up the tube blank and conveys it forward.

[0047] Due to the large diameter, heavy weight per meter, and limited cross-sectional roundness of the tube blank, it is prone to skewing or jamming when rolling on the inclined surface. The inclined section of the loading platform 31 smoothly transitions to the first transition inclined platform 35, ensuring the tube blank maintains point contact with the inclined surface throughout the rolling process. This minimizes the contact area and reduces rolling resistance, preventing the tube blank from stalling on the inclined surface. Simultaneously, the feeding speed of the first feeding arm 32 is adjustable. Operators can set a suitable feeding speed based on the different cross-sectional dimensions and weights of the tube blanks, allowing them to enter the downstream equipment at an appropriate speed and reducing the impact on the first conveyor chain 10.

[0048] The integrated transmission mechanism 12 includes a mounting base 38, a transmission roller conveyor 41, a second transition ramp 42, a second feeding arm 36, a second synchronous shaft 37, and a second drive unit 39. The mounting base 38 is fixed to the ground foundation, providing stable support for the integrated transmission mechanism 12.

[0049] The conveyor roller 41 is mounted on the mounting base 38. One end of the conveyor roller 41 extends along the X-direction transport line, corresponding to the centralized drive roller 3, to receive the tube blank from the X-direction. A second transition ramp 42 is provided downstream of the conveyor roller 41 along the Y-direction transport line. The second transition ramp 42 is inclined downward along the Y-direction transport line, and its slope angle ensures that the tube blank can roll smoothly downward under its own weight.

[0050] The conveyor roller conveyor 41 is equipped with multiple V-shaped rollers spaced at preset intervals along the X-axis transport line. The V-shaped grooves of the V-shaped rollers are adapted to the cylindrical surface of the tube blank, and the tube blank is automatically centered on the V-shaped rollers to prevent axial swaying on the roller conveyor. The multiple V-shaped rollers are arranged at intervals along the X-axis, and the distance between adjacent V-shaped rollers is determined according to the shortest length of the tube blank, ensuring that the tube blank is in contact with at least two V-shaped rollers at any time, maintaining stable support.

[0051] Multiple V-shaped rollers are equipped with guide plates 40 at predetermined intervals at both ends along the Y-axis transport line. Two guide plates 40 are positioned higher than the ends of the V-shaped rollers, forming an axial limit for the tube blank. The top surface of the guide plate 40 near the second transition ramp 42 is flush with the top surface of the second transition ramp 42. After the tube blank is moved away from the transport roller track 41, it can smoothly roll along the top surface of the guide plate 40 onto the second transition ramp 42. The distance between the two guide plates 40 is slightly greater than the length of the tube blank. After entering the multiple V-shaped rollers, the tube blank will roll back and forth due to inertia. During the rolling process, it is guided and limited by the two guide plates 40, reducing the rolling of the tube blank until it maintains a stable posture.

[0052] The top surface of the guide plate 40 near the Y-direction transport line has a downward slope, which satisfies the rolling of the blank and is higher than the roller bearing seat of the V-shaped roller and the initial feeding position of the third feeding assembly 14. This setting can extend the receiving length of the roller V-shaped surface.

[0053] Downstream of the second transition ramp 42, a second conveyor chain 13 is provided, which receives the tube blank rolling off the second transition ramp 42 and conveys it downstream. Downstream of the second conveyor chain 13, a third feeding assembly 14 is provided, which feeds the tube blank from the end of the second conveyor chain 13 into the next station.

[0054] The second synchronous shaft 37 is located below the conveyor roller conveyor 41 and rotatably mounted on the mounting base 38. The second feeding arm 36 is fixed to the second synchronous shaft 37, and the second drive unit 39 drives the second synchronous shaft 37 to rotate. The second feeding arm 36 has multiple rollers at one end near the tube blank. When the rollers contact the tube blank, rolling friction is generated, which reduces the resistance and wear during the feeding process. The feeding speed of the second feeding arm 36 can be adjusted according to the size and weight of the tube blank.

[0055] The billet coming from the X direction can directly pass along the axis between the two guide plates 40 and stop on the V-shaped roller of the conveyor roller table 41. The billet coming from the Y direction is stopped on the conveyor roller table 41 after being limited by the two guide plates 40. The second drive unit 39 is activated, driving the second feeding arm 36 to swing through the second synchronous shaft 37. The second feeding arm 36 is raised upward, and the roller at the front end abuts against the lower surface of the billet, picking up the billet from the V-shaped roller and pushing it towards the guide plate 40 near the second transition ramp 42. After passing the guide plate 40, the billet rolls along the top surface of the guide plate 40 to the second transition ramp 42, and then rolls down the slope of the second transition ramp 42 onto the second conveyor chain 13. The compact structure of the integrated conveyor mechanism 12 makes full use of the space under the roller table to install the feeding device, completing the reversing transport of the billet in the narrow operating space with cross-flow.

[0056] The second conveyor chain 13 transports the tube blank downstream to the lifting mechanism 15. The lifting mechanism 15 is located at the end of the second conveyor chain 13 and is used to lift the tube blank from a lower position to a higher position to adapt to the feed inlet height of the downstream heating furnace.

[0057] A transition platform 16 is provided downstream of the lifting mechanism 15. The transition platform 16 is a fixed inclined platform, with its starting end flush with the highest position of the lifting mechanism 15, to receive the tube blank delivered by the lifting mechanism 15. A baffle structure is provided at the end of the transition platform 16 to prevent the tube blank from continuing to roll under its own weight.

[0058] Downstream of the transition platform 16 is a fourth material feeding assembly 17, and downstream of the fourth material feeding assembly 17 is a billet transfer mechanism 18. The fourth material feeding assembly 17 feeds the billet from the transition platform 16 into the billet transfer mechanism 18, and its structure is the same as that of the first material feeding assembly 4.

[0059] The lifting mechanism 15 includes a receiving platform and lifting claws. The receiving platform is located at the outlet of the second conveyor chain 13 and receives the tube blanks fed by the second conveyor chain 13. The receiving surface of the receiving platform has a V-shaped structure, and the tube blanks are automatically centered after entering the receiving platform. The lifting claws are located on the side of the receiving platform. Driven by the drive device, the lifting claws swing upwards, lifting the tube blanks from the receiving platform and raising them to the height of the transition platform 16. After the lifting claws reach the highest position, they flip over, and the tube blanks roll off the lifting claws onto the transition platform 16 under their own weight, rolling along the inclined surface of the transition platform 16 until their ends are blocked by the retaining structure.

[0060] The billet transfer mechanism 18 is located between the lifting mechanism 15 and the weighing mechanism 21. The billet transfer mechanism 18 is used to adjust the transport direction of the billet so that the axis of the billet is consistent with the feeding direction of the heating furnace.

[0061] The billet transfer mechanism 18 includes a turning conveyor roller conveyor, which is inclined downwards, and the billet rolls on the turning conveyor roller conveyor by its own weight.

[0062] Due to the large weight of the billet, and to facilitate its smooth entry into the downstream heating furnace, a preset horizontal angle is established between the deflecting conveyor rollers and the lifting mechanism 15. This horizontal angle is set according to the feeding direction of the heating furnace at the downstream station. After entering the deflecting conveyor rollers, the billet is guided and constrained to roll downwards. When the billet rolls to the end of the deflecting conveyor rollers, its transport direction has been adjusted to be consistent with the feeding direction of the heating furnace, thus maintaining efficient transport of the billet.

[0063] Downstream of the steering conveyor rollers is a fifth feeding assembly 19, which feeds the billet from the end of the steering conveyor rollers. Downstream of the fifth feeding assembly 19 is a storage platform 20, which is a buffer storage platform used to temporarily store the billet that has completed directional adjustment, in order to balance the difference between the upstream feeding rhythm and the downstream heating furnace feeding rhythm. Downstream of the storage platform 20 is a weighing mechanism 21.

[0064] The weighing mechanism 21 is used to perform a final weighing of the tube blank before it enters the heating furnace and to record the accurate weight data of each tube blank.

[0065] The weighing mechanism 21 includes a weighing base 45, a weighing component 48, a buffer receiving platform 50, and a buffer receiving drive unit 49. The weighing base 45 is located near the billet transfer mechanism 18, providing basic support for the weighing mechanism 21.

[0066] A third drive unit 44 is provided on the weighing base 45. The output end of the third drive unit 44 is connected to the claw spindle 46, and the claw spindle 46 is connected to the feeding claw 43. The feeding claw 43 swings under the drive of the third drive unit 44. A roller is provided at the end of the feeding claw 43 near the tube blank. The feeding claw 43 picks up material from the storage platform 20 one by one and pushes the tube blank toward the buffer receiving platform 50.

[0067] Downstream of the weighing base 45 is a weighing assembly 48, which is an electronic weighing device containing a weighing sensor. Above the weighing assembly 48 is a weighing roller conveyor 47, which carries the tube blank and outputs it to the next process. The weighing roller conveyor 47 is arranged parallel to the axis of the tube blank. After weighing is completed, the weighing roller conveyor 47 is activated to transport the tube blank forward.

[0068] Downstream of the weighing roller conveyor 47 is a buffer receiving platform 50, with an upwardly extending arc-shaped receiving surface on the side facing the tube blank. The radius of the arc-shaped receiving surface is adapted to the outer diameter of the tube blank. After being propelled by the feeding claw 43, the tube blank rolls along the arc-shaped receiving surface onto the buffer receiving platform 50. The arc-shaped receiving surface buffers and decelerates the tube blank, stably supporting it at the bottom of its V-shaped groove. Because the tube blank is heavy per meter, directly falling onto the weighing roller conveyor 47 would cause a severe impact, damaging the weighing sensor. The buffer receiving platform 50 first supports the tube blank, avoiding the impact load on the weighing sensor.

[0069] The output of the buffer receiving drive unit 49 is connected to the buffer receiving platform 50 and drives the buffer receiving platform 50 to rise and fall. The buffer receiving drive unit 49 is hydraulically driven. The compressibility of the hydraulic system plays a buffering role during the receiving process, further absorbing the impact energy of the tube blank. When the buffer receiving drive unit 49 rises, the buffer receiving platform 50 rises to the receiving position. After the tube blank is buffered on the arc-shaped receiving surface, it is guided to a preset position above the roller surface of the weighing roller conveyor 47. After the tube blank contacts the weighing roller conveyor 47, the buffer receiving drive unit 49 continues to descend, causing the buffer receiving platform 50 to detach from the tube blank. The tube blank is completely supported by the weighing roller conveyor 47, and the weighing component 48 weighs the tube blank and reads the weight data.

[0070] A safety baffle 22 is provided at one end of the weighing roller conveyor 47 along the axial direction of the tube blank. The safety baffle 22 is located on the side of the weighing roller conveyor 47 to prevent the tube blank from being pushed out of the roller conveyor due to accidental circumstances during weighing.

[0071] After weighing is completed, the buffer receiving drive unit 49 drives the buffer receiving platform 50 to rise and reset to the receiving position, waiting for the next tube blank. The weighing roller conveyor 47 starts and outputs the tube blank along its axial direction to the heating furnace feeding device of the next process.

[0072] The control logic for each transmission device in this system is built on a PLC. Position sensors are installed at key locations in each workstation to detect whether the billet is in position. Encoders are installed on the drive motors of the roller conveyor and conveyor chain to detect the conveying speed and stroke. Proximity switches are set at the extreme positions of each feeding component to detect whether the feeding arm has moved to the correct position. All signals from sensors and actuators are connected to the PLC control system. The PLC controls the start-stop sequence and action timing of each device according to a preset logic program, realizing automatic start-stop, fault interlock protection, and remote monitoring of the system.

[0073] When multiple tube blanks arrive simultaneously from multiple transport roller conveyors 1 in the current process, the transverse conveyor mechanism 2 sequentially connects with each transport roller conveyor 1, receiving the tube blanks one by one and transferring them to the centralized drive roller conveyor 3. The centralized drive roller conveyor 3 transports the tube blanks downstream. If the tube blanks have no subsequent processing steps, the centralized drive roller conveyor 3 stops transporting, and the first material feeding assembly 4 is activated to feed the tube blanks into the collection platform 5. The tube blanks on the collection platform 5 are temporarily stacked after being limited by the buffer baffle 6, pending subsequent unified processing.

[0074] If the billet requires further processing, the centralized transmission roller conveyor 3 continues to transport it. When the billet reaches the lifting baffle assembly 26, the baffle drive unit 30 drives the baffle arm 27 to swing down to the working position, and the billet buffer unit 28 faces the billet infeed direction. After colliding with the billet buffer unit 28, the billet stops at the set metal wire position, completing the positioning. After positioning, the baffle drive unit 30 drives the baffle arm 27 to rise, and the billet continues to advance along the centralized transmission roller conveyor 3 into the transmission roller conveyor 41 of the integrated transmission mechanism 12.

[0075] Simultaneously, on the Y-axis transport line, the gantry crane places the tube blank on the flat section of the loading platform 31 of the loading platform 8. The loading and unloading assembly 9 is activated, and the first drive unit 34 drives the first unloading arm 32 to swing via the first synchronous shaft 33. The roller at the front end of the first unloading arm 32 unloads the tube blank from the flat section into the inclined section. The tube blank rolls along the inclined section to the first transition ramp 35 and continues to roll onto the first conveyor chain 10. The first conveyor chain 10 transports the tube blank to the second unloading assembly 11, which feeds the tube blank into the uphill section of the guide plate 40 of the integrated transmission mechanism 12 in a direction perpendicular to the tube blank axis. The tube blank rolls along the uphill section of the guide plate 40 between the V-shaped rollers on the transmission roller conveyor 41 and stops after being limited by the two guide plates 40.

[0076] The tube blanks in the X and Y directions converge on the conveyor rollers 41. The second drive unit 39 is activated, and the second feeding arm 36 feeds the tube blank from the conveyor rollers 41 onto the second transition ramp 42. The tube blank rolls down the second transition ramp 42 onto the second conveyor chain 13. The second conveyor chain 13 transports the tube blank downstream.

[0077] The third feeding assembly 14 feeds the billet from the end of the second conveyor chain 13 into the receiving platform of the lifting mechanism 15. The lifting claws raise the billet from the receiving platform to the height of the transition platform 16, and the billet rolls down onto the transition platform 16. The fourth feeding assembly 17 feeds the billet from the transition platform 16 into the turning conveyor roller conveyor of the billet transfer mechanism 18. The billet rolls in the V-groove of the turning conveyor roller conveyor, and its axis gradually rotates to be consistent with the feeding direction of the heating furnace. The fifth feeding assembly 19 feeds the billet from the end of the turning conveyor roller conveyor into the storage platform 20 for temporary storage.

[0078] The feeding claw 43 picks up a single billet from the storage platform 20 and pushes it toward the buffer receiving platform 50. The buffer receiving platform 50 rises to the receiving position, and its arc-shaped receiving surface receives the billet and brings it to a stop within the V-groove. The buffer receiving drive unit 49 drives the buffer receiving platform 50 to descend, slowly placing the billet onto the weighing roller conveyor 47. The weighing component 48 reads the weight data of the billet. After weighing, the buffer receiving platform 50 continues to descend to the position where it is detached from the billet, and the weighing roller conveyor 47 starts, outputting the billet along its axial direction to the feed inlet of the heating furnace for the next process. The entire process is automatic and continuous, requiring no manual intervention.

[0079] It should be noted that this invention protects not only the individual functional mechanisms, but also the complete transportation connection architecture consisting of the X-direction transport line, Y-direction transport line, integrated transmission mechanism, second conveyor chain, lifting mechanism, billet transfer mechanism, and weighing mechanism connected in sequence. This connection architecture constitutes a fully automated transportation system from gantry crane loading, multi-flow branching transport, finished product collection, multi-line integrated convergence transport, reversing transport to weighing output.

[0080] Considering that there is currently no precedent in China for continuous line transportation of large-diameter metal tube blanks with a single weight of more than 5 tons and a diameter of more than 800 mm, and existing technologies all use gantry cranes for point-to-point lifting, the whole-line connection mode of the present invention itself constitutes an important breakthrough of the existing technology.

[0081] It should be understood that the scope of protection of this invention is not limited to the specific equipment configuration disclosed in this embodiment. Any addition of straightening machines, sawing equipment, flaw detection devices, or other process equipment to the transport line to adapt to different process requirements based on the connection architecture of this invention, or extension, cutting, or recombination of a part of the connection of this invention to form a new transport line, as long as its core still includes the connection structure layout described in this invention where the X-direction transport line and the Y-direction transport line intersect at the integrated transmission mechanism and are sequentially connected to the lifting mechanism, the billet transfer mechanism, and the weighing mechanism via the second conveyor chain, all fall within the scope of protection of this invention.

[0082] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A large-diameter hot-rolled metal billet transport system, characterized in that, This includes an X-axis transport line, a Y-axis transport line, and an integrated transmission mechanism located at the intersection of the two lines; The X-direction transport line includes several transport roller conveyors. A transverse conveying mechanism is provided downstream of the several transport roller conveyors. A centralized drive roller conveyor is provided downstream of the transverse conveying mechanism. A first material feeding assembly is provided in the middle of the centralized drive roller conveyor. A collection platform is provided on the side of the centralized drive roller conveyor. The integrated transmission mechanism is provided downstream of the centralized drive roller conveyor. A lifting baffle assembly is provided between the centralized drive roller conveyor and the integrated transmission mechanism. The Y-direction transport line includes a loading platform, a loading and unloading assembly, a first conveyor chain, and a second unloading assembly arranged sequentially along the billet transport direction. The downstream of the second unloading assembly is connected to an integrated transmission mechanism. The downstream of the integrated transmission mechanism is provided with a second conveyor chain. The downstream of the second conveyor chain is provided with a lifting mechanism, a billet transfer mechanism, and a weighing mechanism in sequence. The centralized transmission roller conveyor transports the tube blank to the integrated transmission mechanism in a direction parallel to the tube blank axis, and the second material feeding assembly transports the tube blank to the integrated transmission mechanism in a direction perpendicular to the tube blank axis.

2. The large-diameter hot-rolled metal billet transport system as described in claim 1, characterized in that, The plurality of transport rollers are arranged on one side of the transverse conveying mechanism, and a positioning baffle is provided on the other side of the transverse conveying structure; The transport direction of the plurality of transport rollers for the tube blank is set to be parallel to the axis of the tube blank, and the transport direction of the transverse conveying mechanism for the tube blank is set to be perpendicular to the axis of the tube blank. The collecting platform is arranged on the side of the centralized transmission roller conveyor along the direction perpendicular to the axis of the tube blank. The first feeding assembly moves the tube blank to the collecting platform along the direction perpendicular to the axis of the tube blank. The collecting platform is provided with a buffer baffle on the side away from the centralized transmission roller conveyor along the direction perpendicular to the axis of the tube blank.

3. The large-diameter hot-rolled metal billet transport system as described in claim 1, characterized in that, The transverse conveying mechanism includes a track base, a transverse distribution vehicle, and a distribution vehicle buffer unit; a track is laid on the track base, the transverse distribution vehicle is set on the track and moves back and forth along the track, the distribution vehicle buffer unit is set at both ends of the track base, and a roller conveyor for conveying tube blanks is provided on the top of the transverse distribution vehicle.

4. The large-diameter hot-rolled metal billet transport system as described in claim 1, characterized in that, The lifting baffle assembly includes a baffle base, a baffle arm, a billet buffer unit, and a baffle drive unit. The base of the baffle drive unit is hinged to the baffle base, and the output end of the baffle drive unit is hinged to the baffle arm. The baffle arm is located on the upper part of the baffle base. The baffle drive unit drives the baffle arm to swing around the hinge point, moving closer to or away from the baffle base. The billet buffer unit is located on the side of the baffle arm facing the billet infeed direction.

5. A large-diameter hot-rolled metal billet transport system as described in claim 1, characterized in that, The loading platform is provided with a loading platform surface. The receiving surface of the loading platform surface that receives the billet is set as a V-shaped structure combining a plane and an inclined plane. A first transition inclined platform is provided downstream of the loading platform surface. The first transition inclined platform is inclined downward along the Y direction. The loading and unloading assembly is located at the bottom of the loading platform frame. The feeding and feeding assembly includes a first feeding arm, a first synchronous shaft, and a first drive unit. The first feeding arm is mounted on the first synchronous shaft, and the first drive unit drives the first synchronous shaft to rotate. The end of the first feeding arm near the tube blank is provided with multiple rollers. The first feeding arm pushes the tube blank from the feeding table into the first transition ramp. A first conveyor chain is provided downstream of the first transition ramp, and a second feeding assembly is provided downstream of the first conveyor chain.

6. A large-diameter hot-rolled metal billet transport system as described in claim 1, characterized in that, The integrated transmission mechanism includes a mounting base, a transmission roller conveyor, a second transition ramp, a second feeding arm, a second synchronous shaft, and a second drive unit. The conveyor roller is mounted on the mounting base. One end of the conveyor roller extends along the X-direction transport line and corresponds to the centralized drive roller. A second transition ramp is provided downstream of the conveyor roller along the Y-direction transport line. The second transition ramp is inclined downward along the Y-direction transport line. The conveyor roller conveyor is provided with a plurality of V-shaped rollers spaced at a predetermined distance along the X-direction transport line. Guide plates are provided at both ends of the plurality of V-shaped rollers spaced at a predetermined distance along the Y-direction transport line. Two of the guide plates are respectively positioned above the ends of the V-shaped rollers. The top surface of the guide plate near the second transition ramp is flush with the top surface of the second transition ramp. The top surface of the guide plate near the Y-direction transport line has a downward slope, which satisfies the rolling of the blank along the Y-direction. Furthermore, the top surface of the guide plate near the Y-direction transport line is higher than the initial position of the roller conveyor bearing seat and the second feeding arm of the conveyor roller conveyor. A second conveyor chain is provided downstream of the second transition ramp, and a third material feeding assembly is provided downstream of the second conveyor chain. The second synchronous shaft is located below the conveyor roller and is rotatably mounted on the mounting base. The second feeding arm is fixed on the second synchronous shaft. The second drive unit drives the second synchronous shaft to rotate. The end of the second feeding arm near the tube blank is provided with multiple rollers.

7. A large-diameter hot-rolled metal billet transport system as described in claim 1, characterized in that, The lifting mechanism is located at the end of the second conveyor chain. A transition platform is located downstream of the lifting mechanism. A fourth material feeding assembly is located downstream of the transition platform. A blank transfer mechanism is located downstream of the fourth material feeding assembly. The lifting mechanism includes a receiving platform and lifting claws. The receiving platform is located at the outlet of the second conveyor chain and receives the tube blank sent by the second conveyor chain. The lifting claws are located on the side of the receiving platform and lift the tube blank from the receiving platform to the transition platform.

8. A large-diameter hot-rolled metal billet transport system as described in claim 1, characterized in that, The billet transfer mechanism is located between the lifting mechanism and the weighing mechanism. The billet transfer mechanism includes a steering conveyor roller conveyor, which is inclined downward. A fifth material feeding assembly is located downstream of the steering conveyor roller conveyor. A material storage platform is located downstream of the fifth material feeding assembly. A weighing mechanism is located downstream of the material storage platform. The turning conveyor rollers and the lifting mechanism have a preset horizontal angle, which is configured to be set according to the feeding direction of the heating furnace set in the downstream station, so that the billet enters the heating furnace after turning.

9. A large-diameter hot-rolled metal billet transport system as described in claim 1, characterized in that, The weighing mechanism includes a weighing base, a weighing component, a buffer receiving platform, and a buffer receiving drive unit; The weighing base is located near the billet transfer mechanism. A third drive unit is provided on the weighing base. The output end of the third drive unit is connected to the claw spindle. The claw spindle is connected to the feeding claw. The feeding claw swings under the drive of the third drive unit. A weighing assembly is provided downstream of the weighing base, a weighing roller conveyor is provided above the weighing assembly, a buffer receiving platform is provided downstream of the weighing roller conveyor, and an upwardly extending arc-shaped receiving surface is provided on the side of the buffer receiving platform facing the tube blank. The output end of the buffer receiving drive unit is connected to the buffer receiving platform and drives the buffer receiving platform to rise and fall. A safety baffle is provided at one end of the weighing roller conveyor along the axial direction of the tube blank.

10. The working method of a large-diameter hot-rolled metal billet transport system as described in any one of claims 1-9, characterized in that, include: On the X-axis transport line, multiple tube blanks are simultaneously transported to the transverse transport mechanism along several transport rollers in a direction parallel to the tube blank axis. After collecting tube blanks in a direction perpendicular to the tube blank axis, the transverse conveyor mechanism transfers multiple tube blanks to a centralized drive roller conveyor. The centralized drive roller conveyor conveys the tube blanks downstream in a direction parallel to the tube blank axis. When the tube blank has no subsequent processing steps, the first material feeding assembly feeds the tube blank into the collection table in a direction perpendicular to the tube blank axis. When the tube blank has subsequent processing steps, the tube blank is positioned by the lifting baffle assembly and continues to be conveyed along the centralized drive roller conveyor to the integrated transmission mechanism. On the Y-axis transport line, the tube blank is placed on the loading platform of the loading platform. The loading and feeding assembly feeds the tube blank from the loading platform into the first transition ramp. The tube blank rolls along the first transition ramp to the first conveyor chain. The first conveyor chain transports the tube blank to the second feeding assembly. The second feeding assembly feeds the tube blank into the conveyor roller conveyor of the integrated conveyor mechanism in a direction perpendicular to the tube blank axis. The tube blank gradually reduces its shaking between the two guide plates of the conveyor roller conveyor and then becomes stable. The integrated conveying mechanism brings together the tube blanks from the X-axis conveyor line and the Y-axis conveyor line on the conveying roller table. The second feeding arm feeds the tube blanks on the conveying roller table into the second transition ramp. The tube blanks enter the second conveying chain along the second transition ramp. The second conveying chain transports the tube blanks downstream. The third feeding component feeds the tube blank from the end of the second conveyor chain into the receiving platform of the lifting mechanism, and the lifting claw lifts the tube blank from the receiving platform to the transition platform. The fourth feeding assembly feeds the tube blank from the transition table into the transfer mechanism, which causes the tube blank to roll on the turning conveyor rollers to adjust the conveying direction; the fifth feeding assembly feeds the tube blank from the transfer mechanism into the storage table. The feeding claw of the weighing mechanism picks up a single piece of material from the storage platform, causing the tube blank to roll into the weighing mechanism. The buffer receiving platform rises, causing the arc-shaped receiving surface to come into contact with the tube blank for buffering. The tube blank then moves onto the weighing roller conveyor, where the weighing assembly weighs the tube blank. After weighing, the buffer receiving platform descends, and the weighing roller conveyor outputs the tube blank to the next process.

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