Protection device for continuous casting

Abstract

The invention discloses a protection device for continuous casting, which relates to the technical field of continuous casting equipment, solves the problems of temperature control or improper operation and casting blank deformation or rushing-out slippage, and comprises a crystallizer, a guide roller group and a support roller group, and blank induction mechanisms are distributed on the guide roller group and the support roller group. Comprising a blank temperature sensing module and a blank position sensing module, the blank temperature sensing module comprises a temperature probe, monitoring points are arranged on the periphery of a casting blank, the temperature probe is arranged on the monitoring points, a guide roller set is provided with a quenching assembly and comprises a strengthened spraying head, the strengthened spraying head is provided with a moving platform, and the monitoring points coincide with the moving track of the strengthened spraying head. A controller is additionally arranged, and a buffering anti-falling assembly is arranged on the supporting roller set. The temperature abnormal area is recognized, the controller collects data and controls the moving platform to move together with the strengthened spraying head, the overall temperature of the casting blank is controlled, the overall temperature distribution interval of the casting blank is conveniently established, cooling is uniform, and the accident rate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of continuous casting equipment. Background Art

[0002] Continuous casting equipment is a key equipment in the steel industry, which is used to continuously cast high-temperature molten steel into billets of various shapes. Common continuous casting equipment includes the following parts: molten steel carrier, tundish and its replacement device, crystallizer and its vibration device, ingot guide device, secondary cooling zone clamping roller and cooling water system, cutting equipment, and pulling straightening machine. The molten steel carrier includes molten steel ladle, turntable, etc. The tundish and its replacement device play the role of buffering and purifying molten steel. Water is forced to cool evenly through the outer wall of the crystallizer; the ingot guide device includes an ingot guide head. Before the continuous casting starts, the ingot guide head is used to block the lower mouth of the crystallizer, and the billet is pulled out of the casting machine after the molten steel solidifies. The clamping roller of the secondary cooling zone is installed at the outlet of the crystallizer to accelerate the solidification of the billet and control the temperature of the billet. The pulling straightening machine provides billet drawing power and straightens the bent billet. The cutting equipment cuts the billet in continuous motion into fixed lengths. In the entire continuous casting process, the support roller group used to support and guide the billet plays a very important role. When the ingot is pulled out from the lower mouth of the crystallizer, only a 10-25 mm in thickness shell is condensed on the surface, and the center is still unsolidified molten steel. In order to smoothly pull the ingot and accelerate the solidification and straightening of the molten steel, it is necessary to set up guiding, cooling and straightening devices for the ingot.

[0003] Due to improper temperature control or improper operation, the billet is prone to deformation or punching out or slipping from the roller group. The billet falls from the roller stand during the transmission process. Especially now that the continuous casting process has been improved and the billet drawing speed has been greatly increased, when leakage occurs, it will cause serious safety risks. The billet impact damages the roller group and other equipment, and also poses a huge hidden danger to the staff. Due to technical, process, management and operational reasons, leakage problems occur from time to time in local steel companies, and each leakage causes huge losses. Therefore, full monitoring and continuous guidance of the billet during continuous casting are necessary conditions for safe production. Summary of the invention

[0004] The purpose of the present invention is: in order to solve the above-mentioned technical problems, the present invention provides a continuous casting protection device, which can monitor the continuous casting process throughout, collect the temperature and position data of the billet, ensure the temperature control of the billet, and reduce the occurrence of billet deformation and falling accidents.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A protective device for continuous casting, comprising a crystallizer and an arc-shaped guide roller group located below the crystallizer, and also comprising a support roller group horizontally arranged at the end of the guide roller group, wherein a billet sensing mechanism is distributed on the guide roller group and the support roller group, wherein the billet position sensing mechanism comprises a billet temperature sensing module and a billet position sensing module, wherein the billet temperature sensing module comprises a plurality of temperature probes arranged around the ingot, and a plurality of monitoring points are arranged around the ingot, wherein the monitoring points are evenly distributed above and on both sides of the ingot, wherein the temperature probes are arranged on the monitoring points, wherein a quenching assembly is arranged on the guide roller group, wherein the quenching assembly comprises a plurality of strengthening spray heads arranged on both sides of the guide roller group, wherein the strengthening spray heads are connected to an external water source, wherein a moving platform is arranged on the strengthening spray heads, wherein the monitoring points coincide with the moving trajectory of the strengthening spray heads, wherein a controller is further provided, wherein the billet sensing mechanism and the quenching assembly are both electrically connected to the controller, and wherein a buffer anti-falling assembly is arranged on the support roller group.

[0007] Through the above scheme, that is, by setting the billet sensing mechanism on the guide roller group and the support roller group, the position of the billet is monitored throughout the production process, and monitoring points are set to monitor the position of the billet on the guide roller group and the support roller group, that is, the middle and side positions of the billet are detected by temperature probes at various locations, and the temperature of each point of the billet is collected. At the same time, the billet position is fed back by the billet position sensing module, and the temperature abnormality area is timely identified. The controller collects data and controls the movement of the mobile platform together with the enhanced spray head to control the overall temperature of the billet, so as to establish the overall temperature distribution range of the billet, cool down evenly, avoid excessive temperature differences in various locations, keep the billet in a stable shape, and help maintain stable and efficient production. The whole process quickly and accurately cools the billet, effectively reduces the incidence of accidents, and has high safety and good protection for the overall equipment and personnel.

[0008] Furthermore, the controller sets target temperatures for the center and edge of the ingot surface respectively, and controls the movement and spraying trajectory of the strengthening spray head according to the actual temperature feedback from the temperature probe.

[0009] Through the above scheme, by setting the target temperature for the center and edge of the ingot surface respectively, the controller can simultaneously control the movement and spraying trajectory of the enhanced spray head according to the actual temperature feedback from the temperature probe, thereby realizing rapid identification and cooling of abnormal areas.

[0010] Furthermore, the installation positions of the monitoring points include the top and left and right sides below the crystallizer, the middle of the guide roller group on the top and left and right sides of the billet, and the tail of the guide roller group connected to the drawing and straightening machine on the top and left and right sides of the billet.

[0011] Through the above scheme, the installation positions of the monitoring points include the top and left and right sides below the crystallizer, the middle part of the guide roller group on the top and left and right sides of the billet, and the tail of the guide roller group connected to the drawing and straightening machine on the top and left and right sides of the billet. The entire trajectory of the billet on the guide roller group is detected, which is convenient for establishing the overall temperature data of the billet and strengthening the control of the production process.

[0012] Furthermore, the billet position sensing module includes an image acquisition module arranged on both sides of the guide roller group and the support roller group, and the image acquisition module includes a camera and an image processing unit for identifying the billet body, billet head and billet tail.

[0013] Through the above scheme, the image acquisition module is set to collect the image of the ingot, and the image processing unit is used to identify the ingot body, the ingot head and the ingot tail, so as to collect the position data of the ingot on the roller group, control the position relationship of the ingot, and facilitate rapid detection of abnormalities and daily maintenance.

[0014] Furthermore, the image processing unit combines the temperature probe data to output a billet image with temperature distribution marks, and the image processing unit is electrically connected to the controller.

[0015] Through the above scheme, by combining the collected temperature probe data and image acquisition data, a billet graph with temperature distribution marks can be output, which is convenient for the staff to intuitively record the billet temperature distribution on a daily basis, and further intuitively enhances the data collection and recording capabilities of the continuous casting process.

[0016] Furthermore, each group of enhanced spray heads has two symmetrically distributed ones, and each enhanced spray head is connected to a water source via an independent pipeline.

[0017] Through the above scheme, two sets of independent pipelines and enhanced spray heads are set up, which is convenient for increasing the spray cooling capacity and improving the cooling speed. At the same time, when the enhanced spray head at one end fails, the other end continues to be used, thereby improving the fault tolerance of the device.

[0018] Furthermore, the end of the enhanced spray head is provided with heat-insulating tiles around the water outlet.

[0019] Through the above scheme, the provision of heat insulation tiles can reduce the heat radiation of the ingot and extend the service life of the strengthening spray head.

[0020] Furthermore, the buffer anti-fall component includes a buffer plate arranged at the terminal end of the support roller group roller conveyor, the end surface of the buffer plate facing the support roller group roller conveyor is made of cork, and the buffer plate is surrounded by a mounting frame, the mounting frame is mounted on both sides of the support roller group, and an annular spring member is provided between the buffer plate and the mounting frame.

[0021] Through the above scheme, a buffer plate is set at the terminal of the supporting roller group roller table to buffer and slow down the ingot, which is convenient for stopping and transporting the ingot. The buffer plate is connected to the installation frame through an annular spring member, and deceleration is achieved through the spring. The buffer plate is made of cork material to reduce the rigid collision between the ingot and the buffer plate.

[0022] Furthermore, the annular spring member and the buffer plate are connected at the connection point by a shear pin, and the impact load of the shear pin shearing off due to overload is greater than the load of the daily casting billet impacting the buffer plate.

[0023] Through the above scheme, a shear pin is provided to connect the annular spring part and the buffer plate. Under normal use, the daily load of the billet impacting the buffer plate is much lower than the shearing load of the shear pin. When an accident occurs and the billet impacts the buffer plate at high speed, the shear pin is overloaded and sheared. The buffer plate is separated from the mounting frame after a certain deceleration of the billet, thereby preventing the billet from damaging the buffer plate and the mounting frame due to high-speed impact. At the same time, the billet is appropriately decelerated to reduce accident damage.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention discloses a protective device for continuous casting. By setting a billet sensing mechanism on a guide roller group and a support roller group, the position of the billet is monitored throughout the production process. Monitoring points are set to monitor the position of the billet on the guide roller group and the support roller group, that is, the temperature probes at various locations are used to detect various locations such as the middle and side of the billet, and the temperature of each point of the billet is collected. At the same time, the billet position is fed back in combination with the billet position sensing module, and the temperature abnormality area is timely identified. The controller collects data and controls the movement of the mobile platform together with the enhanced spray head to control the overall temperature of the billet, so as to facilitate the establishment of the overall temperature distribution range of the billet, evenly cool down, avoid excessive temperature differences at various locations, keep the billet in a stable shape, and help maintain stable and efficient production. The billet is cooled quickly and accurately during the whole process, effectively reducing the incidence of accidents, and having high safety and good protection for the overall device and personnel.

[0026] 2. By combining the collected temperature probe data and image acquisition data, a billet graph with temperature distribution marks can be output, which is convenient for the staff to intuitively record the billet temperature distribution on a daily basis, and further intuitively enhances the data collection and recording capabilities of the continuous casting process;

[0027] 3. Buffer plates are set to buffer and slow down the ingots, so as to facilitate the interception and transportation of the ingots. When an accident occurs and the ingots hit the buffer plates at high speed, the shear pins are overloaded and cut off. The buffer plates are separated from the mounting frame after slowing down the ingots to a certain extent, so as to avoid damage to the buffer plates and mounting frame by high-speed impact of the ingots. At the same time, the ingots are appropriately slowed down to reduce accident damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a partial structural schematic diagram of the temperature probe of the present invention;

[0030] Figure 3 It is a partial structural schematic diagram of the buffer anti-falling assembly of the present invention;

[0031] Figure 4 It is a system schematic diagram of the present invention.

[0032] Figure numerals: 11, crystallizer; 12, guide roller group; 13, support roller group; 14, temperature probe; 15, monitoring point; 16, enhanced spray head; 17, mobile platform; 18, camera; 19, insulation tile; 20, buffer plate; 21, mounting frame; 22, annular spring member; 23, shear pin; 24, ladle turntable. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1

[0036] like Figure 1 and Figure 2 and Figure 3 and Figure 4As shown, this embodiment provides a continuous casting protection device, including a ladle turntable 24, a crystallizer 11 and an arc-shaped guide roller group 12 located below the crystallizer 11, and also including a support roller group 13 arranged horizontally at the end of the guide roller group 12, and a billet sensing mechanism is distributed on the guide roller group 12 and the support roller group 13. The billet position sensing mechanism includes a billet temperature sensing module and a billet position sensing module. The billet temperature sensing module includes a plurality of temperature probes 14 arranged around the billet, and a plurality of monitoring points 15 are arranged around the billet. The monitoring points 15 are evenly distributed above and on both sides of the billet. The temperature probes 14 are arranged on the monitoring points 15. A quenching component is arranged on the guide roller group 12, and the quenching component includes a Several strengthening spray heads 16 are provided on both sides of the guide roller group 12. The strengthening spray heads 16 are connected to an external water source. A mobile platform 17 is provided on the strengthening spray head 16. The mobile platform 17 is fixed to the basic frame. The strengthening spray head 16 can move along the mobile platform 17. The moving mode can adopt the common driving moving mode. The monitoring point 15 coincides with the moving track of the strengthening spray head 16. A controller is also provided. The controller is a common PLC controller, and computer control can also be adopted. The billet sensing mechanism and the quenching component are electrically connected to the controller. The controller sets the target temperature for the center and edge of the casting surface respectively, and controls the moving spray track of the strengthening spray head 16 according to the actual temperature feedback from the temperature probe 14. The support roller group 13 is provided with a buffer anti-falling component.

[0037] Therefore, the billet sensing mechanism is set on the guide roller group 12 and the support roller group 13 to monitor the position of the billet throughout the production process, and the monitoring point 15 is set to monitor the position of the billet on the guide roller group 12 and the support roller group 13, that is, the temperature probes 14 at various locations are used to detect various positions such as the middle and side of the billet, collect the temperature of each point of the billet, and at the same time, the billet position sensing module is combined to feedback the billet position, and the temperature abnormal area is timely identified. The controller collects data and controls the mobile platform 17 together with the strengthening spray head 16 to move, and the overall temperature of the billet is monitored. The temperature distribution range of the entire ingot can be established by controlling the degree of temperature control. By setting the target temperatures for the center and edge of the ingot surface respectively, the controller can control the movement and spraying trajectory of the intensified spray head 16 according to the actual temperature feedback from the temperature probe 14, so as to realize rapid identification and cooling of abnormal areas. The cooling is uniform, and excessive temperature differences in various places are avoided, so as to keep the ingot in a stable shape, which is conducive to maintaining stable and efficient production. The ingot is cooled quickly and accurately during the whole process, which effectively reduces the occurrence rate of accidents, and has high safety and good protection for the overall device and personnel.

[0038] Reference Figure 1 and Figure 2In order to enhance the monitoring of the ingot, the monitoring points 15 are installed at the positions below the crystallizer 11, above the ingot and on the left and right sides, and at the middle of the guide roller group 12, above the ingot and on the left and right sides, and at the tail of the guide roller group 12, which is connected to the drawing and straightening machine and is located on the ingot and on the left and right sides. The ingot position sensing module includes an image acquisition module arranged on both sides of the guide roller group 12 and the support roller group 13. The image acquisition module includes a camera 18 and an image processing unit for identifying the ingot body, the ingot head and the ingot tail. Multiple monitoring points 15 are set to detect the entire trajectory of the ingot on the guide roller group 12, so as to facilitate the establishment of the overall temperature data of the ingot and strengthen the control of the production links. By setting the image acquisition module to collect the ingot image, and at the same time identifying the ingot body, the ingot head and the ingot tail through the image processing unit, it is convenient to collect the position data of the ingot on the roller group, control the position relationship of the ingot, and facilitate the rapid discovery of abnormalities and daily maintenance.

[0039] Reference Figure 1 and Figure 2 Each group of strengthening spray heads 16 has two symmetrically distributed ones, each strengthening spray head 16 is connected to the water source by an independent pipeline, and the end of the strengthening spray head 16 is provided with a heat insulation tile 19 around the water outlet. The heat insulation tile 19 can reduce the heat radiation of the casting and extend the service life of the strengthening spray head 16. Two sets of independent pipelines and strengthening spray heads 16 are provided to increase the spray cooling amount and improve the cooling speed. At the same time, when one end of the strengthening spray head 16 fails, the other end continues to be used, thereby improving the fault tolerance rate of the device.

[0040] Reference Figure 1 and Figure 2 In order to further improve the observation of the ingot and facilitate the operation of the staff, the image processing unit combines the data of the temperature probe 14 to output the ingot graphics with temperature distribution marks. The image processing unit is electrically connected to the controller. By combining the collected temperature probe 14 data and the image acquisition data, a ingot graphics with temperature distribution marks can be output, which is convenient for the staff to intuitively record the temperature distribution of the ingot on a daily basis, and further intuitively enhances the data collection and recording capabilities of the continuous casting process.

[0041] Reference Figure 1 and Figure 3 In order to reduce the impact of the ingot, the buffer anti-fall assembly includes a buffer plate 20 arranged at the end of the roller table of the support roller group 13. The end surface of the buffer plate 20 facing the roller table of the support roller group 13 is made of cork. The buffer plate 20 is surrounded by a mounting frame 21, which is erected on both sides of the support roller group 13. An annular spring member 22 is arranged between the buffer plate 20 and the mounting frame 21. The annular spring member 22 is connected to the buffer plate 20 by a shear pin 23. The impact load of the shear pin 23 shearing off due to overload is greater than the daily impact load of the ingot on the buffer plate 20.

[0042] The shear pin 23 is provided to connect the annular spring member 22 and the buffer plate 20. Under normal use, the load of the daily billet impacting the buffer plate 20 is much lower than the shearing load of the shear pin 23. When an accident occurs and the billet impacts the buffer plate 20 at high speed, the shear pin 23 is overloaded and sheared. The buffer plate 20 is separated from the mounting frame 21 after a certain deceleration of the billet, so as to avoid the billet from damaging the buffer plate 20 and the mounting frame 21 due to the high-speed impact. At the same time, the billet is appropriately decelerated to reduce accident damage. The buffer plate 20 is provided at the roller table terminal of the support roller group 13 to buffer and decelerate the billet, so as to facilitate the interception and transportation of the billet. The buffer plate 20 is connected to the mounting frame 21 through the annular spring member 22, and the deceleration is achieved through the spring. The buffer plate 20 is made of cork to reduce the rigid collision between the billet and the buffer plate 20.

[0043] Implementation principle: by setting up the billet sensing mechanism on the guide roller group 12 and the support roller group 13, the position of the billet is monitored throughout the production process, and the monitoring point 15 is set to monitor the position of the billet on the guide roller group 12 and the support roller group 13, that is, the temperature probes 14 at various locations are used to detect various positions such as the middle and side of the billet, and the temperature of each point of the billet is collected. At the same time, the billet position is fed back by the billet position sensing module to timely identify the temperature abnormal area. The controller collects data and controls the movement of the mobile platform 17 together with the enhanced spray head 16 to control the overall temperature of the billet, so as to establish the overall temperature distribution range of the billet, cool down evenly, avoid excessive temperature differences in various locations, keep the billet in a stable shape, and help maintain stable and efficient production. The whole process quickly and accurately cools the billet, effectively reduces the incidence of accidents, and has high safety and good protection for the overall device and personnel.

Claims

1. A continuous casting protection device, comprising a crystallizer (11) and an arc-shaped guide roller group (12) located below the crystallizer (11), and also comprising a support roller group (13) arranged horizontally at the end of the guide roller group (12), characterized in that: A billet sensing mechanism is distributed on the guide roller group (12) and the support roller group (13). The billet position sensing mechanism includes a billet temperature sensing module and a billet position sensing module. The billet temperature sensing module includes a plurality of temperature probes (14) arranged around the billet. A plurality of monitoring points (15) are arranged around the billet. The monitoring points (15) are evenly distributed above and on both sides of the billet. The temperature probes (14) are arranged on the monitoring points (15). A quenching assembly is provided on the guide roller group (12). The quenching assembly includes a plurality of enhanced spray heads (16) arranged on both sides of the guide roller group (12). The enhanced spray heads (16) are connected to an external water source. A moving platform (17) is provided on the enhanced spray heads (16). The moving tracks of the monitoring points (15) and the enhanced spray heads (16) coincide. A controller is also provided. The billet sensing mechanism and the quenching assembly are both electrically connected to the controller. A buffer anti-falling assembly is provided on the support roller group (13).

2. A continuous casting protection device according to claim 1, characterized in that: The controller sets target temperatures for the center and edge of the surface of the ingot respectively, and controls the movement and spraying trajectory of the strengthening spray head (16) according to the actual temperature feedback from the temperature probe (14).

3. A continuous casting protection device according to claim 2, characterized in that: The installation positions of the monitoring points (15) include the top and left and right sides below the crystallizer (11), the middle of the guide roller group (12) on the top and left and right sides of the blank, and the tail of the guide roller group (12) connected to the drawing and straightening machine on the top and left and right sides of the blank.

4. A continuous casting protection device according to claim 2, characterized in that: The billet position sensing module comprises an image acquisition module arranged on both sides of the guide roller group (12) and the support roller group (13), and the image acquisition module comprises a camera (18) and an image processing unit for identifying the billet body and the billet head and billet tail.

5. A continuous casting protection device according to claim 4, characterized in that: The image processing unit combines the data of the temperature probe (14) to output a casting image with temperature distribution marks, and the image processing unit is electrically connected to the controller.

6. A continuous casting protection device according to claim 1, characterized in that: Each group of enhanced spray heads (16) has two symmetrically distributed ones, and each enhanced spray head (16) is connected to a water source via an independent pipeline.

7. A continuous casting protection device according to claim 6, characterized in that: The end of the enhanced spray head (16) is provided with heat insulation tiles (19) around the water outlet.

8. A continuous casting protection device according to claim 1, characterized in that: The buffer anti-falling component comprises a buffer plate (20) arranged at the end of the roller conveyor of the support roller group (13); the end surface of the buffer plate (20) facing the roller conveyor of the support roller group (13) is made of cork; a mounting frame (21) is arranged around the buffer plate (20); the mounting frame (21) is mounted on both sides of the support roller group (13); and an annular spring member (22) is arranged between the buffer plate (20) and the mounting frame (21).

9. A continuous casting protection device according to claim 8, characterized in that: The annular spring member (22) and the buffer plate (20) are connected at a connection point by a shear pin (23), and the impact load of the shear pin (23) shearing off due to overload is greater than the load of the ordinary casting billet impacting the buffer plate (20).

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