Material transfer and conveying system

Abstract

The present invention belongs to the technical field of rolling steel production, and particularly relates to a material transfer and conveying system, which includes a conveying chain platform, a conveying roller table, and a steel transfer trolley; the conveying roller table includes a plurality of parallel conveying rollers; the conveying chain platform is arranged on one side of the conveying roller table and includes a plurality of mutually parallel conveying chains; the steel transfer trolley moves along the guiding device, thereby driving the lifting mechanism thereon to shuttle between adjacent conveying rollers and between adjacent conveying chains; the lifting mechanism on the steel transfer trolley can extend and retract independently to realize the lifting and moving of the bar; by adopting a C-shaped bracket, the system shutdown caused by the accumulation of bars on the conveying chain platform is avoided. The present invention uses a connecting rod to connect the driving parts on a plurality of steel transfer trolleys, and uses a single hydraulic cylinder to drive the movement of a plurality of lifting mechanisms, ensuring the consistency of the lifting movement, avoiding the deformation of the bars, and also making the structure of the system simpler, reducing the manufacturing and maintenance costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel rolling production, and particularly relates to a material transfer and conveying system. Background Art

[0002] During the production of steel bars, it is necessary to convey the long steel bars on the cooling bed to the cold shear for shearing into national standard scales. Currently, the common practice is to use multiple flat support mechanisms. The support plate of the flat support mechanism is connected to one end of the connecting rod, and the other end of the connecting rod is hinged to a fixed point. The driving device drives the connecting rod to swing around its other end, so that the support plate revolves around the above fixed point (the support plate always remains horizontal), and the long steel bars are supported and moved to the conveying roller table, and are conveyed to the cold shear platform through the conveying roller table for sizing processing. Since the steel bars are long and heavy, the driving device needs to be equipped with a large driving force for supporting and moving, and the friction between the steel bars and the conveying rollers is large during the process of placing them on the conveying roller table after being supported and moved, which affects the service life of the conveying rollers. During the supporting and moving process, because the support plate runs along a circumference, the supported steel bars will accumulate on one side, causing the steel bars placed on the conveying roller table to cross and accumulate, which is not conducive to subsequent cold shear shearing.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above deficiencies in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide a material transfer and conveying system to at least solve the problems that during the current transfer of long steel bars, cross-accumulation is not conducive to subsequent cold shear sizing, and the friction between the steel bars and the conveying roller table during the transfer process affects the service life of the conveying rollers.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A material transfer and conveying system includes a support, a conveying chain platform, a conveying roller table, and a steel bar transfer unit arranged on the support; a guiding device is arranged on the support; the conveying roller table includes a plurality of parallel conveying rollers; the conveying chain platform is arranged on one side of the conveying roller table, and the conveying chain platform includes a plurality of parallel conveying chains; the steel bar transfer unit includes a steel bar transfer driving device and at least two steel bar transfer trolleys arranged along the conveying direction of the conveying roller table. The steel bar transfer trolleys are arranged on the support, and the steel bar transfer driving device drives the steel bar transfer trolleys to move between adjacent two conveying chains and between adjacent two conveying rollers along the guiding device, and all the steel bar transfer trolleys move synchronously; the steel bar transfer trolley includes a vehicle body and a lifting mechanism for supporting the object to be transferred on the conveying chain. The lifting mechanism can expand and contract independently. When the lifting mechanism contracts, the upper surface of the steel bar transfer trolley is lower than the upper surfaces of the conveying chain platform and the conveying roller table, and the steel bar transfer trolley drives the lifting mechanism to move between adjacent conveying rollers and between adjacent conveying chains.

[0007] In the material transfer and conveying system described above, as a preferred embodiment, the lifting mechanism includes a hydraulic cylinder, a lifting lever, an auxiliary lever and a bracket. The hydraulic cylinder moves along with the steel transfer trolley. The lifting lever includes a driving part and a transmission part. One end of the transmission part is hinged to the body of the steel transfer trolley, and the other end of the transmission part is hinged to the bracket. One end of the driving part is connected to the transmission part, and the other end of the driving part is hinged to the piston rod head of the hydraulic cylinder. The auxiliary lever has the same length as the transmission part. Both ends of the auxiliary lever are respectively hinged to the body of the steel transfer trolley and the bracket, and the auxiliary lever is arranged parallel to the transmission part. Preferably, the hydraulic cylinder is arranged at the bottom of the body of the steel transfer trolley.

[0008] In the material transfer and conveying system described above, as a preferred embodiment, the bracket is C-shaped. The bracket includes a supporting part which is located at the upper part of the bracket. The opening direction of the C-shape of the bracket is opposite to the moving direction of the object to be supported and transferred on the conveying chain. Preferably, the width of the supporting part is less than or equal to the length of the conveying roller. Preferably, baffles are arranged on both sides of the supporting part.

[0009] In the material transfer and conveying system described above, as a preferred embodiment, the steel transfer unit further includes a connecting rod. The connecting rod is hinged to the other ends of the driving parts of all the steel transfer trolleys of the steel transfer unit. The hydraulic cylinder is connected to the driving part through the connecting rod. Preferably, the number of the hydraulic cylinders of the steel transfer unit is one.

[0010] In the material transfer and conveying system described above, as a preferred embodiment, the steel transfer driving device includes a driving sprocket, a driven sprocket, a driving chain and a steel transfer driving motor. The driving sprocket and the driven sprocket are respectively located at both ends of the guiding device. Both ends of the driving chain bypass the driving sprocket and the driven sprocket and are respectively connected to both ends of the steel transfer trolley. The steel transfer driving motor is connected to the driving sprocket to drive the driving sprocket to rotate.

[0011] In the material transfer and conveying system described above, as a preferred embodiment, the guiding device is a guide groove. Guide wheels are arranged on the steel transfer trolley, and the guide wheels cooperate with the guide groove. Preferably, an anti-off groove device is arranged on the steel transfer trolley.

[0012] In the material transfer and conveying system described above, as a preferred embodiment, there are two lifting levers and two auxiliary levers. The two lifting levers and the auxiliary levers are arranged in parallel, and are respectively arranged at both ends of the body of the steel transfer trolley and are hinged to both sides of the bracket.

[0013] In the material transfer and conveying system described above, as a preferred solution, a cover plate is provided on the conveying roller. A hole is formed in the cover plate, and the conveying roller is arranged in the hole on the cover plate. The upper surface of the conveying roller is higher than the upper surface of the cover plate. Preferably, retaining edges are provided on both sides of the cover plate.

[0014] In the material transfer and conveying system described above, as a preferred solution, the hydraulic cylinder is connected to the hydraulic valve platform through a high-pressure rubber hose, and the high-pressure rubber hose is arranged inside the chain.

[0015] In the material transfer and conveying system described above, as a preferred solution, the material transfer and conveying system includes a plurality of the steel transfer units, and the steel transfer trolleys of the plurality of steel transfer units are arranged in sequence along the conveying direction of the conveying roller path.

[0016] Compared with the closest prior art, the technical solution provided by the present invention has the following beneficial effects:

[0017] The material transfer and conveying system provided by the present invention realizes the lifting and moving of the bar through the steel transfer trolley arranged between the conveying rollers and between the conveying chains. The present material transfer and conveying system includes a plurality of parallel steel transfer trolleys, realizing the stable lifting and moving of the longer bar. By adopting a C-shaped bracket, when the bars are occasionally stacked on the conveying chain platform, the bracket can be used to lift the bars. After the bracket lifts, it does not affect the continuous transportation of the bars on the conveying chain platform, avoiding the system shutdown caused by the stacking of the bars on the conveying chain platform and not affecting the working efficiency. The steel transfer unit of the present invention connects the driving parts on a plurality of steel transfer trolleys together by adopting a connecting rod, and uses a hydraulic cylinder to drive the lifting mechanism in the steel transfer unit to move, greatly improving the consistency of the lifting and moving, avoiding the deformation of the bar, making the structure of the steel transfer unit simpler, and also reducing the manufacturing and maintenance costs. The material transfer and conveying system of the present invention can set the number of steel transfer units according to the length of the material to be lifted and moved, and synchronously control the pressure, flow rate and commutation of the hydraulic valve group to make a plurality of steel transfer units operate synchronously, greatly increasing the applicable range of the present material transfer and conveying system, which has important significance for the lifting and moving of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specification drawings forming a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. Among them:

[0019] Figure 1 is a schematic structural diagram of the material transfer and conveying system according to an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of the steel transfer unit according to an embodiment of the present invention;

[0021] Figure 3Schematic diagram of the structure of the steel transfer trolley according to the embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the structure of the conveying chain platform and the conveying roller table according to the embodiment of the present invention.

[0023] In the figure: 1, support; 2, conveying chain platform; 201, conveying chain; 202, conveying sprocket; 203, driving device; 3, conveying roller table; 301, conveying roller; 302, cover plate; 4, steel transfer trolley; 5, hydraulic cylinder; 6, lifting lever; 601, driving part; 602, transmission part; 7, auxiliary rod; 8, bracket; 801, supporting part; 9, connecting rod; 10, driving sprocket; 11, driven sprocket; 12, driving chain; 13, guide groove; 14, guide wheel; 15, chain row. Detailed implementation manners

[0024] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0025] In the description of the present invention, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. The terms "connected" and "coupled" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0026] According to an embodiment of the present invention, as Figures 1 to 4 shown, the present invention provides a material transfer and conveying system, which includes a support 1, and a conveying chain platform 2, a conveying roller table 3 and a steel transfer unit provided on the support 1.

[0027] Specifically, the support 1 is provided with a guide device; the conveying roller 3 includes a plurality of parallel conveying rollers 301; the conveying chain platform 2 is provided on one side of the conveying roller 3, and the conveying chain platform 2 includes a plurality of mutually parallel conveying chains 201; the steel moving unit includes a steel moving driving device 203 and at least two (e.g., 5-8) steel moving trolleys 4, the steel moving trolleys 4 are provided on the support 1, the steel moving driving device 203 drives the steel moving trolleys 4 to move along the guide device between two adjacent conveying chains and between two adjacent conveying rollers, and all the steel moving trolleys move synchronously; the steel moving trolley 4 includes a body and a lifting mechanism, the lifting mechanism can be extended and retracted autonomously, when the lifting mechanism is retracted, the upper surface of the steel moving trolley 4 is lower than the upper surface of the conveying chain platform 2 and the conveying roller 3, and the steel moving trolley 4 drives the lifting mechanism to move between adjacent conveying rollers 301 and between adjacent conveying chains 201. Multiple steel moving trolleys 4 are arranged at intervals along the conveying direction of the conveying roller 3.

[0028] In an embodiment of the present invention, when the steel-moving trolley 4 supports the object to be moved on the conveying chain (that is, it moves from bottom to top to make the object to be moved separate from the conveying chain, and then moves it toward the conveying roller), the steel-moving trolley 4 is successively located in the gap between two adjacent conveying chains 201 and in the gap between two adjacent conveying rollers 301, specifically, the upper surface of the steel-moving trolley is located above the plane where the conveying chain 201 is located and above the plane where the conveying roller 301 is located. After the steel-moving trolley 4 has supported the material (that is, it moves from top to bottom to make the object to be moved fall onto the conveying roller), the steel-moving trolley 4 is successively located in the gap between two adjacent conveying rollers 301 and in the gap between two adjacent conveying chains 201, specifically, the upper surface of the steel-moving trolley is located below the plane where the conveying roller 301 is located and below the plane where the conveying chain 201 is located. Preferably, the steel-moving trolley 4 moves in a straight line.

[0029] The following takes steel bars as the transportation object to illustrate the usage process of the material transfer and conveying system of the present invention. It should be noted that the material transfer and conveying system of the present invention is also applicable to the transfer and conveying of other items such as bars and billets, etc., and the present invention does not make any limitations here. When in use, first, the long steel bars transported from the cooling bed are scattered on the conveying chain platform 2, and the conveying chain platform 2 carries the steel bars and moves them towards the conveying roller table 3. When the steel bars approach the conveying roller table 3, the steel bars accumulated on the conveying chain platform reach the preset quantity. At this time, the lifting mechanism is lifted to a position higher than the upper surface of the conveying chain platform 2 to lift the steel bars; secondly, multiple steel transfer carts 4 move synchronously between the corresponding conveying rollers 301 along the guiding device to cross and coincide with the conveying roller table 3. The lifting mechanism contracts to a position below the upper surface of the conveying roller 301, so that the steel bars are placed on the conveying roller table 3. The conveying roller 301 rotates to transfer the steel bars to the next process for sizing and shearing; at the same time, multiple steel transfer carts 4 move synchronously between the corresponding conveying rollers 301 along the guiding device to the lower part of the conveying chain platform 2 to prepare for the next lifting and transfer transportation. The conveying direction of the conveying roller 301 is perpendicular to the conveying direction of the conveying chain platform 2. For example, the conveying direction of the conveying roller 301 is horizontal, and the conveying direction of the conveying chain platform 2 is longitudinal.

[0030] Further, the lifting mechanism includes a hydraulic cylinder 5, a lifting lever 6, an auxiliary rod 7 and a bracket 8. The hydraulic cylinder 5 moves with the steel transfer cart 4. The lifting lever 6 includes a driving part 601 and a transmission part 602. One end of the transmission part 602 is hinged to the body of the steel transfer cart 4, and the other end of the transmission part 602 is hinged to the bracket 8. One end of the driving part 601 is connected (such as welded) to the transmission part 602, and the other end of the driving part 601 is hinged to the piston rod cylinder head of the hydraulic cylinder 5; the auxiliary rod 7 has the same length as the transmission part 602. Both ends of the auxiliary rod 7 are respectively hinged to the body of the steel transfer cart 4 and the bracket 8, and the auxiliary rod 7 is arranged in parallel with the transmission part 602; preferably, the hydraulic cylinder 5 is arranged at the bottom of the body of the steel transfer cart 4. In the embodiment of the present invention, one end of the driving part 601 is fixedly connected to one end of the transmission part 602 at a certain angle, and the lifting lever 6 is in an L shape.

[0031] Further, the bracket 8 is C-shaped. The bracket 8 includes a supporting portion 801 which is located at the upper part of the bracket 8. The opening direction of the C-shape of the bracket 8 is opposite to the moving direction of the object to be supported on the conveying chain 201. During use, when occasionally the steel bars on the conveying roller path 3 have not been completely conveyed, while the steel bars on the conveying chain platform 2 are already approaching the conveying roller path 3, the hydraulic cylinder 5 lifting mechanism can be used to lift and support the steel bars on the conveying chain platform 2. Since the bracket 8 is C-shaped, when the bracket 8 is in the lifted state, the upper surface of the conveying chain platform 2 is within the range of the C-shaped opening, and the conveying chain platform 2 below the supporting portion 801 can continue to carry the steel bars for operation, and there is no phenomenon that the bracket 8 obstructs the steel bars, and the working efficiency is not affected. Preferably, the width of the supporting portion 801 is less than or equal to the length of the conveying roller 301; baffles are provided on both sides of the supporting portion 801.

[0032] Further, the steel bar moving unit further includes a connecting rod 9. The connecting rod 9 is hinged to the other ends of the driving portions 601 of all the steel bar moving trolleys 4 of the steel bar moving unit. The hydraulic cylinder 5 is connected to the driving portion 601 through the connecting rod 9. The number of hydraulic cylinders 5 in the steel bar moving unit is one, that is, all the steel bar moving trolleys in the steel bar moving unit share one hydraulic cylinder 5. By providing the connecting rod 9 in the steel bar moving unit, it is convenient for the synchronous movement of all the lifting mechanisms in the steel bar moving unit, which can greatly save the number of hydraulic cylinders 5, make the structure simpler, and reduce the manufacturing cost and maintenance cost.

[0033] Further, the steel bar moving driving device 203 includes a driving sprocket 10, a driven sprocket 11, a driving chain 12 and a steel bar moving driving motor. The driving sprocket 10 and the driven sprocket 11 are respectively located at both ends of the guiding device. Both ends of the driving chain 12 bypass the driving sprocket 10 and the driven sprocket 11 and are respectively connected to both ends of the steel bar moving trolley 4. The steel bar moving driving motor is connected to the driving sprocket 10 to drive the driving sprocket 10 to rotate. In this embodiment, the steel bar moving driving motor is a servo motor, which can accurately control the rotation direction and rotation speed, and can accurately control the starting and stopping positions of the steel bar moving trolley 4 during use. In specific use, since multiple steel bar moving trolleys 4 need to move synchronously, the driving sprockets 10 of multiple steel bar moving driving devices 203 can be connected through a rotating shaft, and the steel bar moving driving motor is used to drive the rotating shaft to rotate, so as to drive multiple driving devices 203 to operate synchronously. Such a setting not only ensures the synchronous movement of the steel bar moving trolleys 4, but also greatly saves the number of steel bar moving driving motors, simplifies the structure, improves the system stability, and reduces the manufacturing cost and maintenance cost.

[0034] Further, the guiding device is a guide groove 13, and guide wheels 14 are arranged on the steel transfer trolley 4. The guide wheels 14 cooperate with the guide groove 13. Preferably, an anti-off-track device is arranged on the steel transfer trolley 4. In other embodiments of the present invention, when the connection stiffness between the steel transfer trolley 4 and the guide groove 13 is insufficient, a guide block can be additionally arranged on the steel transfer trolley 4, and the guide block cooperates with the guide groove 13, thereby greatly enhancing the connection strength between the steel transfer trolley 4 and the guide groove 13 and greatly enhancing the bearing capacity of the steel transfer trolley 4.

[0035] Further, there are two lifting levers 6 and auxiliary levers 7 respectively. The two lifting levers 6 and auxiliary levers 7 are arranged in parallel, are respectively arranged at both ends of the body of the steel transfer trolley 4, and are hinged to both sides of the bracket 8.

[0036] Further, a cover plate 302 is arranged on the conveying roller 301. A hole is opened in the cover plate 302, and the conveying roller 301 is arranged in the hole on the cover plate 302. The upper surface of the conveying roller 301 is higher than the upper surface of the cover plate 302; the use of the cover plate 302 can enclose the space beside the conveying roller 301 to prevent steel bars or other sundries from falling between the conveying rollers 301 and affecting safe production.

[0037] Preferably, baffles are arranged on both sides of the cover plate 302 to confine the steel bars in the area of the conveying roller 301.

[0038] Further, the hydraulic cylinder 5 is connected to the hydraulic valve platform through a high-pressure rubber hose. By synchronously controlling the flow rate, pressure, and commutation of the control valve group, the movement of all hydraulic cylinders 5 is more unified, facilitating synchronous operation. Since the steel transfer trolley 4 needs to move frequently, in order to prevent the high-pressure rubber hose from being worn due to frequent movement, the present invention also provides a drag chain 15, and the high-pressure rubber hose is arranged inside the drag chain 15. The arrangement of the drag chain 15 makes the movement track of the high-pressure rubber hose more regular when the steel transfer trolley 4 moves and can avoid the wear of the high-pressure rubber hose.

[0039] In this embodiment, since the steel bars transferred by the conveying chain platform 2 are relatively long (about 100 meters), the length of the conveying roller path 3 also needs to correspond to the length of the steel bars. In order to provide stable support for movement, the material transfer system includes a plurality of steel transfer units, and the steel transfer trolleys 4 of the plurality of steel transfer units are arranged in sequence along the conveying direction of the conveying roller path 3.

[0040] Such as Figure 1As shown in the figure, the conveying chain platform 2 of the present invention includes a conveying sprocket 202, a conveying chain 201 and a driving device 203. The conveying chain 201 is connected end to end. A plurality of conveying sprockets 202 are supported inside the conveying chain 201 to tension the conveying chain 201 so that the surface of the conveying chain 201 is a plane that meets the transportation requirements. The driving device 203 drives one of the conveying sprockets 202 to rotate, thereby driving the conveying chain 201 to move. In this embodiment, in order to make the plurality of conveying chains 201 of the conveying chain platform 2 run synchronously, one driving device 203 can be used to drive the conveying sprockets 202 inside the plurality of conveying chains 201 to rotate synchronously.

[0041] In summary, the material transfer and conveying system provided by the present invention realizes the lifting and moving of bars through the steel transfer carts arranged between the conveying rollers and between the conveying chains. The material transfer and conveying system includes a plurality of parallel steel transfer carts, which realizes the stable lifting and transfer of longer bars. By adopting a C-shaped bracket, when the bars are stacked on the conveying chain platform, the bracket can be used to lift the bars, and the transportation of the bars on the conveying chain platform is not affected after the bracket lifts, avoiding the system shutdown caused by the stacking of bars on the conveying chain platform and making the working efficiency unaffected. The steel transfer unit of the present invention connects the driving parts on a plurality of steel transfer carts together by using a connecting rod, and uses one hydraulic cylinder to drive the lifting mechanism in the steel transfer unit to move, greatly improving the consistency of the lifting and moving, avoiding the deformation of the bars, making the structure of the steel transfer unit simpler, and also reducing the manufacturing cost and maintenance cost. The material transfer and conveying system of the present invention can set the number of steel transfer units according to the length of the material to be lifted and moved, make a plurality of steel transfer units run synchronously, greatly increasing the applicable range of the material transfer and conveying system, which has important significance for the lifting and transfer of materials.

[0042] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A material transfer and conveying system, characterized in that, It includes a support, a conveying chain platform, a conveying roller path and a steel transfer unit arranged on the support; A guiding device is arranged on the support; The conveying roller path includes a plurality of conveying rollers arranged in parallel; The conveying chain platform is arranged on one side of the conveying roller path, and the conveying chain platform includes a plurality of conveying chains arranged parallel to each other; The steel transfer unit includes a steel transfer driving device and at least two steel transfer trolleys arranged along the conveying direction of the conveying roller path. The steel transfer trolleys are arranged on the support, and the steel transfer driving device drives the steel transfer trolleys to move between adjacent two of the conveying chains and between adjacent two of the conveying rollers along the guiding device, and all the steel transfer trolleys move synchronously; The steel transfer trolley includes a vehicle body and a lifting mechanism for supporting the object to be transferred on the conveying chain. The lifting mechanism can extend and retract independently. When the lifting mechanism contracts, the upper surface of the steel transfer trolley is lower than the upper surfaces of the conveying chain platform and the conveying roller path, and the steel transfer trolley drives the lifting mechanism to move between adjacent conveying rollers and between adjacent conveying chains; The lifting mechanism includes a hydraulic cylinder, a lifting lever, an auxiliary rod and a bracket. The hydraulic cylinder moves with the steel transfer trolley. The lifting lever includes a driving part and a transmission part. One end of the transmission part is hinged to the vehicle body of the steel transfer trolley, and the other end of the transmission part is hinged to the bracket. One end of the driving part is connected to the transmission part, and the other end of the driving part is hinged to the piston rod head of the hydraulic cylinder; The auxiliary rod has the same length as the transmission part. The two ends of the auxiliary rod are respectively hinged to the vehicle body of the steel transfer trolley and the bracket, and the auxiliary rod is arranged parallel to the transmission part; The bracket is C-shaped. The bracket includes a supporting part. The supporting part is located at the upper part of the bracket. The opening direction of the C-shape of the bracket is opposite to the moving direction of the object to be transferred on the conveying chain; The steel transfer unit further includes a connecting rod, and the connecting rod is hinged to the other ends of the driving parts of all the steel transfer trolleys of the steel transfer unit. The hydraulic cylinder is connected to the driving part through the connecting rod; The material transfer and conveying system includes a plurality of the steel transfer units, and the steel transfer trolleys of the plurality of the steel transfer units are arranged in sequence along the conveying direction of the conveying roller path.

2. The material transfer and conveying system according to claim 1, characterized in that, The hydraulic cylinder is arranged at the bottom of the vehicle body of the steel transfer trolley.

3. The material transfer and conveying system according to claim 1, characterized in that The width of the supporting part is less than or equal to the length of the conveying roller.

4. The material transfer and conveying system according to claim 3, characterized in that, Baffles are arranged on both sides of the supporting part.

5. The material transfer and conveying system according to claim 1, characterized in that, The number of the hydraulic cylinders of the steel transfer unit is one.

6. The material transfer and conveying system according to claim 1, wherein, The steel transfer driving device includes a driving sprocket, a driven sprocket, a driving chain and a steel transfer driving motor. The driving sprocket and the driven sprocket are respectively located at both ends of the guiding device. The two ends of the driving chain bypass the driving sprocket and the driven sprocket and are respectively connected to both ends of the steel transfer trolley. The steel transfer driving motor is connected to the driving sprocket to drive the driving sprocket to rotate.

7. The material transfer and conveying system according to claim 1, wherein The guiding device is a guide groove, and guide wheels are arranged on the steel transfer trolley. The guide wheels are matched with the guide groove.

8. The material transfer and conveying system according to claim 7, wherein, An anti-dropping groove device is arranged on the steel transfer trolley.

9. The material transfer and conveying system according to claim 1, characterized in that There are two lifting levers and two auxiliary levers. The two lifting levers and the auxiliary levers are arranged in parallel, respectively arranged at both ends of the body of the steel transfer car, and hinged to both sides of the bracket.

10. The material transfer and conveying system according to claim 1, wherein, A cover plate is provided on the conveying roller. A hole is opened in the cover plate. The conveying roller is arranged in the hole on the cover plate, and the upper surface of the conveying roller is higher than the upper surface of the cover plate.

11. The material transfer and conveying system according to claim 10, wherein, Edge guards are provided on both sides of the cover plate.

12. The material transfer and conveying system according to claim 1, characterized in that, The hydraulic cylinder is connected to the hydraulic valve platform through a high-pressure rubber hose, and the high-pressure rubber hose is arranged in the chain conveyor.

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