Wide and thick casting blank lifting mechanism and using method

Abstract

The invention discloses a wide and thick casting blank lifting mechanism and a using method, and belongs to the technical field of casting blank hot delivery. In order to solve the casting blank conveying problem caused by inconsistent elevation of a continuous casting roller way and a steel rolling roller way, a driving mechanism, a chain, a lifting roller way, a counterweight, a guide mechanism and a control system are adopted, and rapid and stable conveying of casting blanks is achieved through lifting transition of the lifting roller way. According to the technical scheme, the driving mechanism drives the chain to control the lifting roller way to move, the guide mechanism ensures stable operation, the laser detector and the encoder are matched with the control system to achieve accurate positioning and synchronous operation, and the heat preservation cover reduces casting blank temperature drop. The using method comprises the steps of initialization, blank feeding, ascending, blank discharging, descending and circulation, and the automation degree is high. The production efficiency is remarkably improved, the energy consumption and the casting blank temperature drop are reduced, and the device is simple and reliable in structure, suitable for a single-flow or multi-flow continuous casting machine and high in adaptability and application value.

Description

Technical Field

[0001] The present invention belongs to the technical field of hot charging of continuous casting billets, and relates to a lifting mechanism for wide and thick continuous casting billets and a using method thereof. Background Art

[0002] The hot charging technology of continuous casting billets is to directly send the high-temperature continuous casting billets produced by a continuous casting machine into the rolling process for rolling, eliminating the processes of cooling and reheating, thereby significantly reducing energy consumption, improving production efficiency, reducing the loss of scale, and improving the quality of steel. This technology requires efficient connection between the continuous casting machine and the rolling equipment in terms of production rhythm and spatial layout. However, in actual production, there is often a significant elevation difference between the roll surfaces of the continuous casting roller table and the rolling mill roller table, sometimes up to 20 meters, which poses a great challenge to the rapid and stable transportation of continuous casting billets.

[0003] Traditional methods for transporting continuous casting billets mostly rely on overhead crane lifting, that is, the continuous casting billets are clamped from the continuous casting roller table to the rolling mill roller table by an overhead crane. However, this method has various deficiencies. First, the overhead crane lifting takes a long time, and the continuous casting billets are exposed to the air during the lifting process, resulting in a large temperature drop, usually more than 100 °C, which seriously affects the hot charging effect and the quality of steel. Second, the production rhythm of overhead crane lifting is difficult to control, and the lifting time of different continuous casting billets varies, making it difficult to coordinate the production plan of the subsequent rolling process, and the overall production efficiency is low. In addition, the overhead crane lifting equipment is complex, the maintenance cost is high, and there are certain safety hazards during the operation process, making it difficult to meet the requirements of modern steel enterprises for high-efficiency and automated production.

[0004] In recent years, in view of the elevation difference problem in the hot charging process of continuous casting billets, some improvement schemes have been proposed in the industry. For example, some production lines adopt a fixed roller table combined with manual adjustment method, by setting multiple sections of transition roller tables between the continuous casting roller table and the rolling mill roller table, and relying on manual operation or simple mechanical adjustment to position the continuous casting billets. However, this method has low efficiency and high technical requirements for operators, and it is difficult to achieve automated production. In addition, some production lines have tried to use hydraulic lifting platforms to solve the elevation difference problem, but the hydraulic system has poor stability in high-temperature environments, high maintenance difficulty, and the load-bearing capacity of the lifting platform is limited, making it difficult to meet the transportation requirements of wide and thick continuous casting billets. There are also some schemes to avoid the elevation difference by adding long-distance conveying roller tables between the continuous casting machine and the rolling mill, but this not only increases equipment investment and floor area, but also prolongs the transportation time of continuous casting billets, further exacerbating the temperature drop problem.

[0005] The above solution alleviates the conveying problem caused by the elevation difference to a certain extent, but there are still problems such as low efficiency, large temperature drop, and low automation level. Therefore, it has become an urgent technical problem in the field of hot delivery technology of continuous casting billets to develop a lifting mechanism that can convey continuous casting billets quickly and stably, while reducing temperature drop and realizing automatic operation. In view of the above problems, the present invention designs a wide and thick continuous casting billet lifting mechanism with a simple structure and reliable operation, and realizes the efficient conveying of continuous casting billets through an automatic lifting roller table and a precise control system, meeting the requirements of modern steel production for high-efficiency, energy-saving, and automatic processes. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to solve the problem of continuous casting billet conveying caused by the inconsistent elevation of the continuous casting roll surface and the rolling mill roll surface, and to provide a wide and thick continuous casting billet lifting mechanism and a using method, which not only convey continuous casting billets quickly and stably, but also have a simple and reliable lifting mechanism equipment and can realize automatic operation.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A wide and thick continuous casting billet lifting mechanism includes a driving mechanism, a chain, a lifting roller table, a counterweight, a guiding mechanism, and a control system;

[0009] The lifting roller table is arranged between the continuous casting roller table and the rolling mill roller table. The continuous casting roller table and the rolling mill roller table have different roller surface elevations, and the continuous casting billet is conveyed from the continuous casting roller table to the rolling mill roller table through the lifting and moving of the lifting roller table;

[0010] On both sides of the lifting roller table, there are gantries. The driving mechanism is arranged at the top of the gantry, and the guiding mechanism is arranged on the side of the gantry. Both sides of the lifting roller table are slidably matched with the corresponding guiding mechanisms on both sides; the driving mechanism is connected to the chain through a sprocket. One end of the chain is connected to the lifting roller table, and the other end is connected to the counterweight; the driving mechanism drives the lifting roller table to lift along the guiding mechanism, so as to convey the continuous casting billet from the continuous casting roller table to the rolling mill roller table;

[0011] One or multiple lifting roller tables are arranged side by side, corresponding to single-strand or multi-strand continuous casting machines respectively; when there is only one lifting roller table, the driving mechanisms are symmetrically arranged on both sides along the casting flow direction; when there are multiple lifting roller tables, the two driving mechanisms of each lifting roller table are arranged diagonally.

[0012] On the bench, at the roll surface elevation of the continuous casting roller table, two first laser detectors and a fourth laser detector are respectively provided on the outer sides of the front and rear ends of the lifting roller table; on the lifting roller table, a second laser detector and a third laser detector are respectively fixed at its front and rear ends; on the bench, at the roll surface elevation of the rolling mill roller table, a fifth laser detector is provided, and the position of the billet is tracked by the first laser detector, the second laser detector, the third laser detector, the fourth laser detector, and the fifth laser detector;

[0013] The first laser detector, the second laser detector, the third laser detector, the fourth laser detector, the fifth laser detector, and the driving mechanism are all connected to the control system, and the control system controls the lifting according to the billet position.

[0014] Furthermore, the driving mechanism includes a driving motor and a transmission shaft. The driving motor is fixedly arranged on the bench and is connected to the transmission shaft. A sprocket is provided on the transmission shaft and is connected to the chain in a transmission manner; the driving motor is equipped with an incremental encoder for controlling the lifting speed of the lifting roller table and the synchronous lifting on both sides, and the end of the transmission shaft is equipped with an absolute encoder for controlling the up and down movement position of the lifting roller table.

[0015] Furthermore, driving mechanisms are provided on both sides of the lifting roller table. The two driving motors are respectively equipped with a first incremental encoder and a second incremental encoder, and the ends of the two transmission shafts are respectively equipped with a first absolute encoder and a second absolute encoder.

[0016] Furthermore, there are 2 laser rangefinders at the diagonal of the lifting roller table at the top of the bench, namely a first laser rangefinder and a second laser rangefinder, which are used to monitor the height position of the lifting roller table in real time and compare with the data of the absolute encoder configured at the end of the transmission shaft for controlling the height of the lifting roller table.

[0017] Furthermore, guide wheels are provided on the lifting roller table. The guiding mechanism is of a U-shaped groove structure or a channel steel and is arranged at the four corners of the lifting roller table. The lifting roller table moves up and down along the guiding mechanism through the guide wheels.

[0018] Furthermore, the guide wheel is of a combined bearing type structure, and the guide wheel slides in the U-shaped groove or the channel steel.

[0019] Furthermore, a heat preservation cover is provided on the lifting roller table. The heat preservation cover is fixed above the frame of the lifting roller table and covers the area above the billet, which is used to reduce the temperature drop of the billet and isolate the heat radiation of the billet.

[0020] A usage method of a wide and thick billet lifting mechanism as described above includes the following steps:

[0021] (1) Initialization: The lifting roller table is located at the roller surface position of the continuous casting roller table. The first laser detector, the second laser detector, the third laser detector, the fourth laser detector, and the fifth laser detector are all in the light-passing state. The parameters of the first incremental encoder and the second incremental encoder respectively configured on the two drive motors of the drive mechanisms on both sides of the lifting roller table, the first absolute encoder and the second absolute encoder respectively configured at the ends of the transmission shafts connected to the two drive motors, and the first laser rangefinder and the second laser rangefinder configured at the diagonal of the lifting roller table at the top of the bench are set to the initial values;

[0022] (2) Incoming billet: The billet is conveyed from the continuous casting roller table to the lifting roller table. The first laser detector and the second laser detector are blocked by light successively. When the head of the billet reaches the end of the lifting roller table, the third laser detector is blocked by light, and the billet stops advancing. At this time, the fourth laser detector, the first laser detector, and the second laser detector are in the light-passing state;

[0023] (3) Ascending: When the fourth laser detector and the first laser detector are in the light-passing state, the control system starts the drive mechanism to pull the lifting roller table up. The control system controls the lifting speed and the synchronization of the drive mechanisms on both sides according to the feedback of the first incremental encoder and the second incremental encoder. At the same time, it controls the lifting roller table to pass through the continuous casting roller surface position, the continuous casting roller surface acceleration and deceleration position, and the rolling mill roller surface acceleration and deceleration position in sequence according to the feedback of the first absolute encoder and the second absolute encoder, and finally stops at the roller surface position of the rolling mill roller table; The first laser rangefinder and the second laser rangefinder monitor the height of the lifting roller table in real time;

[0024] (4) Outgoing billet: The lifting roller table is located at the roller surface of the rolling mill roller table. The billet is conveyed from the lifting roller table to the rolling mill roller table. The fifth laser detector is blocked by light first and then in the light-passing state. When the billet is completely sent out, both the fourth laser detector and the fifth laser detector are in the light-passing state;

[0025] (5) Descending: When the second laser detector, the third laser detector, and the fifth laser detector are all in the light-passing state, the control system starts the drive mechanism to lower the lifting roller table, and controls the descending speed and the synchronization of both sides according to the feedback of the first incremental encoder and the second incremental encoder. It controls the lifting roller table to pass through the rolling mill roller surface position, the rolling mill roller surface acceleration and deceleration position, and the continuous casting roller surface acceleration and deceleration position in sequence according to the feedback of the first absolute encoder and the second absolute encoder, and finally stops at the continuous casting roller surface position;

[0026] (6) Circulation: The lifting roller table returns to the roller surface position of the continuous casting roller table to prepare for the hot delivery of the next billet.

[0027] Furthermore, during the lifting process of the lifting roller table, the first laser rangefinder and the second laser rangefinder are used to monitor the height position of the lifting roller table in real time, and the data of controlling the height of the lifting roller table by the first absolute encoder and the second absolute encoder are compared respectively. When the difference between the height data of the two is greater than 10 mm, it indicates that there is a problem with the synchronization of the lifting mechanism and timely maintenance is required.

[0028] The beneficial effects of the present invention are as follows:

[0029] The wide and thick slab lifting mechanism and its using method of the present invention provide an efficient, stable and automated solution for the problem of the elevation difference between the continuous casting roller table and the rolling mill roller table during the hot charging process of continuous casting slabs, bringing the following remarkable beneficial effects:

[0030] 1. Rapid and stable transportation, significantly improving production efficiency

[0031] The present invention realizes the rapid vertical transportation of slabs from the continuous casting roller table to the rolling mill roller table through the lifting roller table, replacing the traditional overhead crane lifting method. The traditional lifting takes a long time and the rhythm is unstable, while the lifting roller table of the present invention cooperates with the driving mechanism and chain drive to quickly complete the lifting and transportation of slabs, shortening the transportation time and maintaining the balance of the production rhythm. The stable transportation rhythm ensures the efficient connection between the continuous casting machine and the rolling process, avoiding production bottlenecks caused by uneven rhythm, thus significantly improving the overall production efficiency.

[0032] 2. Reducing the temperature drop of slabs and improving the hot charging effect

[0033] The hot charging of slabs requires minimizing the temperature drop of high-temperature slabs to reduce energy consumption and ensure the quality of steel. The traditional overhead crane lifting takes a long time and the temperature drop of slabs is large, affecting the hot charging effect. The lifting roller table of the present invention significantly shortens the time for slabs to be exposed to the air through rapid lifting and lowering, effectively reducing the temperature drop. In addition, the heat insulation cover equipped on the lifting roller table covers the area above the slabs to isolate heat radiation and further slow down the heat dissipation. This design not only improves the hot charging efficiency, reduces the reheating energy consumption in the rolling process, but also improves the surface quality of steel and reduces the generation of scale.

[0034] 3. Automated operation, reducing manual intervention and safety risks

[0035] The present invention integrates a laser detector, an incremental encoder, an absolute encoder and a laser rangefinder, and works together with the control system to realize the real-time tracking of the slab position, the precise control of the lifting speed and the synchronous operation of the two-side driving mechanisms. The whole process is automatically operated without manual intervention, reducing the technical requirements and working intensity of the operators. Compared with the high-altitude operation and heavy object lifting of the traditional overhead crane lifting, the present invention eliminates the relevant safety hazards and significantly improves the safety of the production process.

[0036] 4. The equipment has a simple structure, reliable operation, and low maintenance cost.

[0037] The lifting mechanism of the present invention adopts conventional mechanical components such as a driving motor, a chain, a lifting roller table, a counterweight, and a guiding mechanism, with a simple structure and low manufacturing and installation costs. The guiding mechanism uses a U-shaped groove or a channel steel in cooperation with guiding wheels to ensure a stable lifting process and reduce mechanical wear. The dual monitoring mechanism of the laser rangefinder and the encoder can detect synchronization problems in real time (such as prompting for maintenance when the height data difference is greater than 10 mm), facilitating timely maintenance and extending the service life of the equipment. Compared with complex systems such as hydraulic lifting platforms, the mechanical structure of the present invention has higher stability in high-temperature environments, and the maintenance difficulty and cost are significantly reduced.

[0038] 5. Strong adaptability, suitable for a variety of production scenarios

[0039] The present invention is flexibly designed. The lifting roller table can be configured in a single or multiple side-by-side forms, corresponding to a single-strand or multi-strand continuous casting machine respectively. The single-strand continuous casting machine adopts a symmetrically arranged driving mechanism, and the multi-strand continuous casting machine adopts a diagonally arranged driving mechanism, both of which can ensure the synchronization and stability of lifting. The load-bearing capacity and size of the lifting roller table can be adapted to various specifications of wide and thick casting billets to meet the requirements of different production lines. This versatility gives the present invention a wide range of application scenarios and popularization value.

[0040] 6. Energy-saving and environmental protection, reducing production costs

[0041] By reducing the temperature drop of the casting billet, the present invention reduces the reheating energy consumption in the rolling process, meeting the green production requirements of energy conservation and emission reduction. The fast and stable conveying rhythm improves the equipment utilization rate, reduces the downtime of the production line, and further reduces the energy consumption and production costs per unit product. The application of the heat preservation cover also reduces the negative impact of heat radiation on surrounding equipment and the environment, improves the working environment, and reflects the environmental protection benefits.

[0042] In summary, the wide and thick casting billet lifting mechanism and its use method of the present invention solve the problem of the elevation difference between the continuous casting roller table and the rolling roller table through a fast, stable, and automated conveying method, significantly improving the production efficiency and hot charging effect, and reducing energy consumption, costs, and safety risks. The equipment has a simple and reliable structure, strong adaptability, and is suitable for single-strand or multi-strand continuous casting machines, with significant economic benefits and popularization and application value, providing important support for the efficient and green development of the modern steel industry.

[0043] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail preferably below in conjunction with the accompanying drawings, where:

[0045] Figure 1 This is the front view of the wide and thick slab lifting mechanism in the present invention.

[0046] Figure 2 This is the schematic plan view of the wide and thick slab lifting mechanism in the twin-strand continuous casting of the present invention.

[0047] Figure 3 This is the side schematic view of the wide and thick slab lifting mechanism in the present invention.

[0048] Figure 4 For Figure 2 the overall layout schematic view of the twin-strand continuous casting conveying line in

[0049] Figure 5 This is the schematic view of the guide wheel and the U-shaped groove.

[0050] Reference numerals: 1 - driving mechanism; 2 - chain; 3 - sprocket; 4 - lifting roller table; 5 - counterweight; 6 - U-shaped groove; 7 - guide wheel; 8 - continuous casting roller table; 9 - rolling mill roller table 1; 10 - bench; 11 - first laser detector; 12 - second laser detector; 13 - third laser detector; 14 - fourth laser detector; 15 - fifth laser detector; 16 - first incremental encoder; 17 - second incremental encoder; 18 - first absolute encoder; 19 - second absolute encoder; 20 - first laser rangefinder; 21 - second laser rangefinder; 22 - slab transverse transfer trolley; 23 - rolling mill roller table 2; 24 - heat preservation cover; 25 - driving motor. Specific embodiments

[0051] The following illustrates the embodiments of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0052] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0053] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0054] See also Figures 1 to 5 , which is a wide and thick billet lifting mechanism installed in the conveying line of a double-strand continuous casting machine. The lifting mechanism includes a driving mechanism 1, a chain 2, a lifting roller table 4, a counterweight 5, a guide mechanism, and a control system;

[0055] The lifting roller table 4 is arranged between the continuous casting roller table 8 and the steel rolling roller table. The continuous casting roller table 8 and the steel rolling roller table have different roller surface elevations. The casting billet is transported from the continuous casting roller table 8 to the steel rolling roller table by the lifting and lowering movement of the lifting roller table 4.

[0056] A stand 10 is arranged on both sides of the lifting roller 4, a driving mechanism 1 is arranged at the top of the stand 10, a guide mechanism is arranged on the side of the stand 10, and both sides of the lifting roller 4 are respectively slidably matched with the guide mechanisms on the corresponding sides; the driving mechanism 1 is connected to the chain 2 through the sprocket 3, one end of the chain 2 is connected to the lifting roller 4, and the other end is connected to the counterweight 5; the driving mechanism 1 drives the lifting roller 4 to rise and fall along the guide mechanism, so as to realize the conveyance of the casting from the continuous casting roller 8 to the steel rolling roller;

[0057] Two first laser detectors 11 and a fourth laser detector 14 are respectively arranged at the roller surface elevation of the continuous casting roller 8 on the stand 10, which are located outside the front and rear ends of the lifting roller 4, that is, the two laser detectors are respectively located at the entrance and the end of the low position; the lifting roller 4 is fixedly provided with a second laser detector 12 and a third laser detector 13 respectively located at the front and rear ends thereof; the stand 10 is provided with a fifth laser detector 15 at the roller surface elevation of the steel rolling roller, that is, the high exit end, and the first laser detector 11, the second laser detector 12, the third laser detector 13, the fourth laser detector 14, and the fifth laser detector 15 are used to track the position of the casting billet;

[0058] The first laser detector 11, the second laser detector 12, the third laser detector 13, the fourth laser detector 14, the fifth laser detector 15, and the driving mechanism 1 are all connected to the control system, and the control system controls the lifting according to the position of the continuous casting billet.

[0059] The driving mechanism 1 includes a driving motor 25 and a transmission shaft. The driving motor 25 is fixedly arranged on the bench 10 and is connected to the transmission shaft. A sprocket 3 is arranged on the transmission shaft and is in transmission connection with the chain 2; The driving motor 25 is equipped with an incremental encoder for controlling the lifting speed of the lifting roller table 4 and the synchronous lifting on both sides. The end of the transmission shaft is equipped with an absolute encoder for controlling the up and down movement position of the lifting roller table 4.

[0060] Driving mechanisms 1 are arranged on both sides of the lifting roller table 4. The first incremental encoder 16 and the second incremental encoder 17 are respectively configured on the two driving motors 25, and the first absolute encoder 18 and the second absolute encoder 19 are respectively configured at the ends of the two transmission shafts.

[0061] There are 2 laser rangefinders at the top of the bench 10 at the diagonal of the lifting roller table 4, namely the first laser rangefinder 20 and the second laser rangefinder 21, which are used to monitor the height position of the lifting roller table 4 in real time and compare with the data of the absolute encoder configured at the end of the transmission shaft to control the height of the lifting roller table 4.

[0062] Guide wheels 7 are arranged on both sides of the lifting roller table 4. The guiding mechanism is of a U-shaped groove 6 structure and is arranged at the four corners of the lifting roller table 4. The lifting roller table 4 moves up and down along the guiding mechanism through the guide wheels 7. When the guide wheels 7 move up and down along the U-shaped groove 6, there are constraints both in the casting flow direction and perpendicular to the casting flow direction, ensuring the stability of the lifting roller table 4.

[0063] The guide wheel 7 is of a combined bearing type structure and is slidably arranged in the U-shaped groove 6.

[0064] According to the actual situation, one or multiple lifting roller tables 4 can be arranged side by side, corresponding to a single-strand or multi-strand continuous caster respectively; When there is only one lifting roller table 4, the driving mechanisms 1 are symmetrically arranged on both sides along the casting flow direction; When there are multiple lifting roller tables 4, the two driving mechanisms 1 of each lifting roller table 4 are arranged diagonally.

[0065] In this embodiment, two lifting roller tables 4 are arranged side by side corresponding to a twin-strand continuous caster, and the continuous casting billets in the first strand and the second strand are alternately conveyed to the rolling roller table two 23 through the continuous casting billet transverse transfer trolley 22.

[0066] In this embodiment, a heat preservation cover 24 is installed on the lifting roller table 4. The heat preservation cover 24 is fixed above the frame of the lifting roller table 4 and covers the area above the continuous casting billet, which is used to reduce the temperature drop of the continuous casting billet and isolate the heat radiation of the continuous casting billet.

[0067] A method for using a wide and thick billet lifting mechanism as above, comprising the following steps:

[0068] (1) Initialization: The lifting roller table 4 is located at the roller surface position of the continuous casting roller table 8. The first laser detector 11, the second laser detector 12, the third laser detector 13, the fourth laser detector 14, and the fifth laser detector 15 are all in the light-passing state. The first incremental encoder 16 and the second incremental encoder 17 respectively configured on the two drive motors 25 on the drive mechanisms 1 on both sides of the lifting roller table 4, the first absolute encoder 18 and the second absolute encoder 19 respectively configured on the ends of the transmission shafts connected to the two drive motors 25, and the parameters of the first laser rangefinder 20 and the second laser rangefinder 21 configured at the diagonal of the lifting roller table 4 at the top of the bench 10 are set to initial values;

[0069] (2) Billet feeding: The billet is conveyed from the continuous casting roller table 8 to the lifting roller table 4. The first laser detector 11 and the second laser detector 12 are successively blocked by light. When the head of the billet reaches the end of the lifting roller table 4, the third laser detector 13 is blocked by light, and the billet stops advancing. At this time, the fourth laser detector 14, the first laser detector 11, and the second laser detector 12 are in the light-passing state;

[0070] (3) Lifting: When the fourth laser detector 14 and the first laser detector 11 are in the light-passing state, the control system starts the drive mechanism 1 to pull the lifting roller table 4 to rise. The control system controls the lifting speed and the synchronization of the drive mechanisms 1 on both sides according to the feedback of the first incremental encoder 16 and the second incremental encoder 17, and at the same time controls the lifting roller table 4 to pass through the continuous casting roller surface position, the continuous casting roller surface acceleration and deceleration position, and the rolling mill roller surface acceleration and deceleration position in sequence according to the feedback of the first absolute encoder 18 and the second absolute encoder 19, and finally stops at the roller surface position of the rolling mill roller table; The first laser rangefinder 20 and the second laser rangefinder 21 monitor the height of the lifting roller table 4 in real time;

[0071] (4) Billet discharging: The lifting roller table 4 is located at the roller surface of the rolling mill roller table. The billet is conveyed from the lifting roller table 4 to the rolling mill roller table 9. The fifth laser detector 15 is blocked by light first and then in the light-passing state. When the billet is completely discharged, both the fourth laser detector 14 and the fifth laser detector 15 are in the light-passing state;

[0072] (5) Lowering: When the second laser detector 12, the third laser detector 13, and the fifth laser detector 15 are all in the light-passing state, the control system starts the drive mechanism 1 to lower the lifting roller table 4, and controls the lowering speed and the synchronization of both sides according to the feedback of the first incremental encoder 16 and the second incremental encoder 17, and controls the lifting roller table 4 to pass through the rolling mill roller surface position, the rolling mill roller surface acceleration and deceleration position, and the continuous casting roller surface acceleration and deceleration position in sequence according to the feedback of the first absolute encoder 18 and the second absolute encoder 19, and finally stops at the continuous casting roller surface position;

[0073] (6) Circulation: The lifting roller table 4 returns to the roller surface position of the continuous casting roller table 8 to start the hot delivery of the next billet.

[0074] Among them, during the lifting process of the lifting roller table 4, the height position of the lifting roller table 4 is monitored in real time through the first laser rangefinder 20 and the second laser rangefinder 21, and is respectively compared with the data for controlling the height of the lifting roller table 4 by the first absolute encoder 18 and the second absolute encoder 19. When the difference between the two height data is greater than 10 mm, it indicates that there is a problem with the synchronization of the lifting mechanism and timely maintenance is required.

[0075] In some embodiments, the continuous casting roller surface can be lower than the rolling mill roller surface or higher than the rolling mill roller surface. The lifting mechanism can send the billet from a low position to a high position or from a high position to a low position.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A wide and thick billet lifting mechanism, characterized in that: It includes driving mechanism, chain, lifting roller, counterweight, guiding mechanism and control system; The lifting roller is arranged between the continuous casting roller and the steel rolling roller. The continuous casting roller and the steel rolling roller have different roller surface elevations. The casting billet is transported from the continuous casting roller to the steel rolling roller by the lifting movement of the lifting roller. The two sides of the lifting roller are provided with a platform, the driving mechanism is arranged at the top of the platform, the guiding mechanism is arranged at the side of the platform, and the two sides of the lifting roller are respectively slidably matched with the guiding mechanisms on the corresponding sides; the driving mechanism is connected to the chain through a sprocket transmission, one end of the chain is connected to the lifting roller, and the other end is connected to the counterweight; the lifting roller is driven by the driving mechanism to rise and fall along the guiding mechanism, so as to realize the conveyance of the casting from the continuous casting roller to the steel rolling roller; The lifting roller is provided with one or multiple lifting rollers are provided side by side, corresponding to a single-strand or multi-strand continuous casting machine respectively; when there is only one lifting roller, the driving mechanism is arranged symmetrically on both sides of the casting strand direction; when there are multiple lifting rollers, the two driving mechanisms of each lifting roller are arranged diagonally; The said platform is provided with two first laser detectors and a fourth laser detector located at the roller surface elevation of the continuous casting roller respectively, which are located outside the front and rear ends of the lifting roller; the said lifting roller is fixedly provided with a second laser detector and a third laser detector located at the front and rear ends thereof respectively; the said platform is provided with a fifth laser detector at the roller surface elevation of the rolling roller, and the position of the casting billet is tracked by the first laser detector, the second laser detector, the third laser detector, the fourth laser detector and the fifth laser detector; The first laser detector, the second laser detector, the third laser detector, the fourth laser detector, the fifth laser detector and the driving mechanism are all connected to a control system, and the control system controls the lifting and lowering according to the position of the casting.

2. The wide and thick casting billet lifting mechanism according to claim 1 is characterized in that: The driving mechanism includes a driving motor and a transmission shaft. The driving motor is fixed on the platform and connected to the transmission shaft. A sprocket is provided on the transmission shaft and is connected to the chain transmission. The driving motor is equipped with an incremental encoder for controlling the lifting speed of the lifting roller and the synchronous lifting of both sides. The end of the transmission shaft is equipped with an absolute encoder for controlling the up and down movement position of the lifting roller.

3. The wide and thick casting billet lifting mechanism according to claim 2 is characterized in that: Both sides of the lifting roller are provided with driving mechanisms, the two driving motors are respectively provided with a first incremental encoder and a second incremental encoder, and the ends of the two transmission shafts are respectively provided with a first absolute encoder and a second absolute encoder.

4. The wide and thick billet lifting mechanism according to claim 2 is characterized in that: There are two laser rangefinders at the top of the platform located at the diagonal of the lifting roller, namely the first laser rangefinder and the second laser rangefinder, which are used to monitor the height position of the lifting roller in real time and compare with the data of the absolute encoder configured at the end of the transmission shaft to control the height of the lifting roller.

5. The wide and thick slab lifting mechanism according to claim 1 is characterized in that: The lifting roller is provided with guide wheels, and the guide mechanism is a U-shaped groove structure or channel steel, which is arranged at the four corners of the lifting roller. The lifting roller moves up and down along the guide mechanism through the guide wheels.

6. The wide and thick billet lifting mechanism according to claim 4 is characterized in that: The guide wheel is a combined bearing type structure, and the guide wheel is slidably arranged in the U-shaped groove or the channel steel.

7. The wide and thick casting billet lifting mechanism according to claim 1 is characterized in that: The lifting roller is provided with a heat-insulating cover, which is fixed above the frame of the lifting roller and covers the area above the ingot, so as to reduce the temperature drop of the ingot and isolate the heat radiation of the ingot.

8. A method for using the wide and thick billet lifting mechanism according to any one of claims 1 to 7, characterized in that: The following steps are involved: (1) Initialization: The lifting roller is located at the roller surface position of the continuous casting roller, the first laser detector, the second laser detector, the third laser detector, the fourth laser detector, and the fifth laser detector are all in the light-transmitting state, the first incremental encoder and the second incremental encoder are respectively configured on the two driving motors on the driving mechanism on both sides of the lifting roller, the first absolute encoder and the second absolute encoder are respectively configured on the ends of the transmission shafts connected to the two driving motors, and the first laser rangefinder and the second laser rangefinder configured at the top of the stand at the diagonal line of the lifting roller are set to the initial values; (2) Billet feeding: The billet is transported from the continuous casting roller to the lifting roller, and the first laser detector and the second laser detector are shielded successively. When the billet head reaches the end of the lifting roller, the third laser detector is shielded and the billet stops moving forward. At this time, the fourth laser detector, the first laser detector and the second laser detector are in the light-transmitting state; (3) Ascending: When the fourth laser detector and the first laser detector are in the light-transmitting state, the control system starts the driving mechanism to pull the lifting roller to ascend. The control system controls the lifting speed and the synchronization of the driving mechanisms on both sides according to the feedback of the first incremental encoder and the second incremental encoder. At the same time, according to the feedback of the first absolute encoder and the second absolute encoder, the lifting roller is controlled to pass through the continuous casting roller surface position, the continuous casting roller surface acceleration and deceleration position, and the steel rolling roller surface acceleration and deceleration position in sequence, and finally stops at the roller surface position of the steel rolling roller; the first laser rangefinder and the second laser rangefinder monitor the height of the lifting roller in real time; (4) Billet discharge: The lifting roller is located on the roller surface of the rolling roller. The billet is transported from the lifting roller to the rolling roller. The fifth laser detector is first shielded and then allowed to light. When the billet is completely discharged, the fourth laser detector and the fifth laser detector are both in the light-transmitting state. (5) Descending: When the second laser detector, the third laser detector and the fifth laser detector are all in the light-transmitting state, the control system starts the driving mechanism to lower the lifting roller, and controls the descending speed and the synchronization of both sides according to the feedback of the first incremental encoder and the second incremental encoder, and controls the lifting roller from the rolling roller surface position to the rolling roller surface acceleration and deceleration position and the continuous casting roller surface acceleration and deceleration position according to the feedback of the first absolute encoder and the second absolute encoder, and finally stops at the continuous casting roller surface position; (6) Cycle: The lifting roller returns to the roller surface position of the continuous casting roller to prepare for the hot delivery of the next ingot.

9. The method of use according to claim 8, characterized in that: During the lifting process of the lifting roller, the height position of the lifting roller is monitored in real time by the first laser rangefinder and the second laser rangefinder, and compared with the data of the first absolute encoder and the second absolute encoder controlling the height of the lifting roller. When the difference between the height data of the two is greater than 10mm, it indicates that there is a problem with the synchronization of the lifting mechanism and timely maintenance is required.

Images