Scale cleaning device and method suitable for steel rolling laminar cooling lower water spraying pipe
By designing a scale cleaning device suitable for cooling the lower water spray pipe with laminar flow, including flushing, scaling and scale brushing, the problem of uneven cooling caused by accumulation of scale in the lower water spray pipe is solved, and cleaning efficiency and cooling uniformity are improved.
Patent Information
- Application Number
- CN202510472400.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2025-06-27
AI Technical Summary
During the cooling process of rolling laminar flow, the lower water spray pipe is frequently started and stopped and scale accumulation, resulting in uneven distribution of cooling water, resulting in uneven cooling of the slab, which in turn causes problems such as inconsistent strip performance, large deviations in the same plate performance, and unstable plate shape. The existing cleaning methods take a long time and are labor-intensive, and the cleaning cycle is relatively long.
A scale cleaning device including flushing, scaling and scaling parts is designed. The flushing part flushes out the scale through high-pressure water flow. The scaling part uses the combination of rotation and transverse movement mechanism to scrape off the scale on the inner wall of the lower water spray pipe, and the scaling part directly cleans the scale on the inner wall of the spray head through a wire brush.
It improves the efficiency of scale cleaning in the lower water spray pipe, reduces the labor intensity of staff, shortens the cleaning cycle, ensures the uniform distribution of cooling water, and improves the cooling effect of the slab.
Smart Images
Figure CN120205497A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a descaling device and method applicable to the lower spray pipes in laminar cooling of rolling mills, in particular to a device and method capable of cleaning the inner wall of the lower spray pipes in laminar cooling of rolling mills and the scale on the nozzles, belonging to the technical field of descaling equipment. Background Art
[0002] Laminar cooling water is used to cool the slab when it enters and exits the rolling mill; during the process of controlled rolling and controlled cooling using laminar cooling water, the lower spray pipes spray cooling water when the slab passes by, and stop spraying after the slab leaves, which causes the lower spray pipes to start and stop frequently; after using for a period of time, scale inevitably accumulates on the inner wall of the lower spray pipes and at the nozzles. The residual water in the upper spray pipes naturally drains out due to gravity, which results in no residual cooling water in the upper spray pipes, while there is residual cooling water in the lower spray pipes, which causes scale to form in the lower spray pipes; the presence of scale will cause the laminar cooling water sprayed by the lower spray pipes to be unevenly distributed, further leading to uneven cooling of the slab, which will cause defects such as unqualified strip steel performance, large deviation in performance of the same slab, and unstable strip shape; in order to obtain a good and uniform cooling effect, the pipes can only be cleaned during the maintenance time each time, which results in a long cleaning cycle for the lower spray pipes; in addition, when cleaning, the flexible connecting water pipes of the lower laminar spray need to be disconnected, and then each water pipe is cleaned with a high-pressure water gun one by one, which not only takes a long time, but also has a high labor intensity for the staff; therefore, a descaling device and method are needed to improve the cleaning efficiency of the lower laminar spray pipes and reduce the adverse impact of scale on the uniformity of the lower laminar cooling water spray. Summary of the Invention
[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a descaling device and method applicable to the lower spray pipes in laminar cooling of rolling mills, which can not only reduce the labor intensity of the staff, but also improve the cleaning efficiency of the scale in the lower spray pipes.
[0004] The problems of the present invention are solved by the following technical solutions: A descaling device applicable to the lower spray pipes in laminar cooling of rolling mills includes a flushing part, a scale scraping part, and a scale brushing part; the flushing part is arranged on the side walls at both ends of the lower spray pipes; the scale scraping part is arranged on the end face of the lower spray pipes far from the lower spray flexible connecting water pipes; the scale brushing part is arranged on the scale scraping part; the scale scraping part includes a rotating mechanism, a transverse moving mechanism, and a scale scraping mechanism; the transverse moving mechanism is arranged on the end face of the lower spray pipes far from the lower spray flexible connecting water pipes, and the rotating mechanism is arranged on the transverse moving mechanism; the scale scraping mechanism is located inside the lower spray pipes and is connected to the transverse moving mechanism.
[0005] The descaling device applicable to the lower spray pipe of laminar flow cooling in steel rolling, the transverse movement mechanism includes a horizontal long plate, a first motor, a lead screw, a lead screw nut, a vertical plate, a first protective cover and a vertical connection block; one end of the horizontal long plate is arranged on the end face of the lower spray pipe away from the lower spray flexible connection water pipe, and the center line of the horizontal long plate is parallel to the axis line of the lower spray pipe; the first motor is arranged at one end of the upper end face of the horizontal long plate, the vertical plate is arranged at the other end of the upper end face of the horizontal long plate, one end of the lead screw is connected to the output shaft of the first motor, and the other end of the lead screw is axially connected to the vertical plate; the lead screw nut is arranged on the lead screw; a first infrared rangefinder is arranged on the end face of the lead screw nut close to the vertical plate, and the signal output end of the first infrared rangefinder is connected to the signal input end of the CPU; a strip-shaped hole is arranged along the length direction of the horizontal long plate, the vertical connection block passes through the strip-shaped hole of the horizontal long plate, and the top end face of the vertical connection block is connected to the bottom end face of the lead screw nut; the first protective cover is arranged on the horizontal long plate, and the first motor, the lead screw, the lead screw nut and the vertical plate are all inside the first protective cover; the signal input end of the first motor is connected to the signal output end of the CPU.
[0006] The descaling device applicable to the lower spray pipe of laminar flow cooling in steel rolling, the rotation mechanism includes an outer sealing cylinder, an end cover, a second motor, a fixed sealing cylinder and a central shaft; a circular hole is arranged at the center of the end face of the lower spray pipe away from the lower spray flexible connection water pipe, and a sealing ring is arranged on the inner wall of the circular hole, the central shaft passes through the circular hole, and the outer wall of the central shaft is in close contact with the sealing ring on the inner wall of the circular hole; an end cover is arranged at the end of the outer sealing cylinder, and a second motor is arranged at the center of the end face of the end cover away from the outer sealing cylinder, and the output shaft of the second motor passes through the side wall of the end cover and is connected to the end of the central shaft; the bottom end face of the vertical connection block is connected to the circumferential outer wall of the outer sealing cylinder; the axis lines of the outer sealing cylinder, the end cover and the central shaft coincide; the fixed sealing cylinder is arranged at the center of the end face of the lower spray pipe away from the lower spray flexible connection water pipe, and its circumferential outer wall is in close contact with the sealing ring on the circumferential inner wall of the outer sealing cylinder; the axis line of the fixed sealing cylinder coincides with the axis line of the outer sealing cylinder; the signal input end of the second motor is connected to the signal output end of the CPU.
[0007] The descaling device applicable to the lower spray pipe of laminar flow cooling in steel rolling, the descaling mechanism includes a circular ring and a descaling piece; one end of the central shaft located inside the lower spray pipe is connected to the inner wall of the circular ring through a bracket; the axis line of the circular ring coincides with the axis line of the central shaft; the number of the descaling pieces is multiple, and they are evenly arranged on the circumferential outer wall of the circular ring; the descaling piece includes a scraping blade and a spring; a strip-shaped hole is arranged on the circumferential outer wall of the circular ring, and the scraping blade is inserted into the strip-shaped hole on the circumferential outer wall of the circular ring, the spring is arranged at the bottom end of the inner wall of the strip-shaped hole on the circumferential outer wall of the circular ring, and the spring is connected to the scraping blade, and the scraping blade is in contact with the inner wall of the lower spray pipe.
[0008] The descaling device applicable to the lower spray pipe of laminar flow cooling in steel rolling, the descaling part includes a first electric cylinder, a V-shaped long plate, a long fixing plate, a second infrared rangefinder, a second protective cover, a support member and a descaling mechanism; the first electric cylinder is arranged on the top surface of the first protective cover through a bracket, and the axis line of the piston rod of the first electric cylinder is parallel to the axis line of the central axis; the long fixing plate is arranged on the top surface of the first electric cylinder along the length direction of the first electric cylinder; the V-shaped long plate has its tip facing upwards, and its bottom end is slidably arranged on the long fixing plate; the side wall of the second protective cover is connected to the end of the V-shaped long plate, and the side wall of the second protective cover is connected to the end of the piston rod of the first electric cylinder; the second infrared rangefinder is arranged on the end surface of the long fixing plate close to the second protective cover, and the infrared emission end of the second infrared rangefinder points to the second protective cover; the second protective cover is in the shape of a long strip-shaped square tube, and its opening faces vertically downwards; the descaling mechanism is arranged inside the second protective cover; the support member is arranged on the outer wall of the second protective cover; the signal input end of the first electric cylinder is connected to the signal output end of the CPU; the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU.
[0009] The descaling device applicable to the lower spray pipe of laminar flow cooling in steel rolling, the descaling mechanism includes an intermediate plate, a second electric cylinder, a guide plate, a third motor, a turntable, a rotating rod and a wire brush; the intermediate plate is arranged at the middle position of the inner wall of the second protective cover; the second electric cylinder is arranged at the center position of the top surface of the intermediate plate; guide holes are symmetrically arranged at both ends of the intermediate plate, and guide plates are arranged in both of the two guide holes; the output shaft of the third motor faces vertically downwards, and the top surface of its housing is connected to the end of the piston rod of the second electric cylinder, and the top surface of the housing of the third motor is connected to the bottom end surface of the guide plate; the end of the output shaft of the third motor is connected to the top surface of the turntable; the top surface of the rotating rod is connected to the center of the bottom surface of the turntable; the wire brush is arranged on the circumferential outer wall of the rotating rod; the signal input ends of the second electric cylinder and the third motor are both connected to the signal output end of the CPU.
[0010] The descaling device applicable to the lower spray pipe of laminar flow cooling in steel rolling, the support member includes a cross bar and a vertical bar; the number of the vertical bars is two, and they are symmetrically arranged at both ends of the cross bar, and the two vertical bars and one cross bar form a U shape; the center of the cross bar is connected to the second protective cover through a bracket; two guide rails are arranged on the outer wall of the lower spray pipe along its length direction, and the two guide rails are symmetrically arranged on both sides of the nozzle of the lower spray pipe; the bottom ends of the two vertical bars are respectively slidably arranged on the two guide rails.
[0011] The descaling device applicable to the lower spray pipe of laminar cooling in rolling steel, the flushing part includes a water inlet joint, a water outlet joint, a first solenoid valve and a second solenoid valve; the water inlet joint is arranged on the side wall of the lower spray pipe, and it is on the same side wall as the lower spray flexible connecting water pipe, and the water inlet joint communicates with the inside of the lower spray pipe; a first solenoid valve is arranged on the water inlet joint, and the first solenoid valve is communicated with the high-pressure water pipe through a long pipe; the water outlet joint is arranged on the side wall of the lower spray pipe far away from the lower spray flexible connecting water pipe, and it communicates with the inside of the lower spray pipe; a second solenoid valve is arranged on the water outlet joint, and it is communicated with the drain port through a long pipe; the signal input ends of the first solenoid valve and the second solenoid valve are both connected to the signal output end of the CPU.
[0012] A descaling method applicable to the lower spray pipe of laminar cooling in rolling steel, comprising the following steps: In the standby state, the outer sealing cylinder is sleeved outside the fixed sealing cylinder, and one end of the outer sealing cylinder away from the end cover touches the side wall of the lower spray pipe; the piston rods of the first electric cylinder and the second electric cylinder are both in the retracted state; when there is no slab passing by and the lower spray pipe needs to be cleaned, the following operations are carried out: Step 1: Start the first electric cylinder to push the descaling mechanism forward until the descaling mechanism moves directly above the first nozzle. The position of the descaling mechanism is accurately monitored by the second infrared rangefinder to ensure that it can move directly above each nozzle; after the rotating rod moves directly above the first nozzle, the first electric cylinder stops, and the second electric cylinder and the third motor start to drive the rotating rod to descend. The rotating rod extends into the first nozzle, and the rotating wire brush cleans the inner wall of the first nozzle. After the piston rod of the second electric cylinder is fully extended and then retracted, after the piston rod of the second electric cylinder is fully retracted, the first electric cylinder continues to move until the rotating rod moves directly above the second nozzle, then the first electric cylinder stops and the second electric cylinder operates, and so on until all the nozzles are cleaned. After cleaning the last nozzle, the third motor stops operating, and the first electric cylinder resets to drive the rotating rod back to the initial position; Step 2: The second motor operates to drive the central shaft to rotate, thereby driving the ring to rotate. The scraping blades on the outer wall of the rotating ring scrape the scale on the inner wall of the lower water spray pipe during the rotation process. At the same time, the first motor operates to drive the lead screw to rotate, thereby driving the lead screw nut to move. The lead screw nut drives the outer sealing cylinder to move synchronously, thereby driving the central shaft and the scraping blades thereon to move along the axis direction of the lower water spray pipe. This causes the scraping blades on the ring to also move horizontally during rotation. Therefore, the scraping blades move in a spiral on the inner wall of the lower water spray pipe, scraping the scale on the inner wall of the lower water spray pipe along the way until the lead screw nut moves to the end of the lead screw. At this time, the ring also moves to the end of the lower water spray pipe. The position of the lead screw nut can be monitored in real time through the first infrared rangefinder, and thus the position of the outer sealing cylinder is known. After the ring moves to the end, the first motor rotates in reverse to drive the outer sealing cylinder to reset and sleeved on the outer wall of the fixed sealing cylinder again. Step 3: After the outer sealing cylinder is in place, the first motor and the second motor are turned off. The first solenoid valve and the second solenoid valve are activated, and high-pressure water flows into the lower water spray pipe and flushes its interior. The water flow carries the scraped scale and discharges it from the water outlet joint.
[0013] In the present invention, the scale on the inner wall of the lower water spray pipe is scraped by the scale scraping part. Since there is residual cooling water inside the lower water spray pipe, the scraped scale is mixed with the residual cooling water. The scale brushing part effectively cleans the scale on the inner wall of the nozzle. Since the nozzles on the lower water spray pipes in the rolling mill are straight cylinders, the scale brushing part can directly extend into the nozzle for scale cleaning. Finally, the scale mixed in the residual cooling water is flushed out of the lower water spray pipe through the flushing part. Brief Description of the Drawings
[0014] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention; Figure 2 is the partial enlarged structure schematic diagram of A of the present invention; Figure 3 is the three-dimensional structure schematic diagram of the scale brushing mechanism of the present invention; Figure 4 is the internal three-dimensional structure schematic diagram of the first protective cover, the outer sealing cylinder and the fixed sealing cylinder of the present invention; Figure 5 is the three-dimensional structure schematic diagram of the ring of the present invention.
[0015] The list of each label in the figure is as follows: 1. Lower spray water pipe, 2. Horizontal long plate, 3. First motor, 4. Lead screw nut, 5. First protective cover, 6. Outer sealing cylinder, 7. End cover, 8. Second motor, 9. Fixed sealing cylinder, 10. Central shaft, 11. Ring, 12. Scraper, 13. First electric cylinder, 14. V-shaped long plate, 15. Second protective cover, 16. Support member, 17. Intermediate plate, 18. Second electric cylinder, 19. Guide plate, 20. Third motor, 21. Turntable, 22. Rotating rod, 23. Wire brush, 24. Second solenoid valve. Detailed implementation mode
[0016] Refer to Figure 1 、 2 、3, 4 and Figure 5 , the present invention includes a flushing part, a scale scraping part and a scale brushing part; the flushing part is arranged on the side walls at both ends of the lower spray water pipe 1; the flushing part is used to flush the mixture of cooling water and scale in the lower spray water pipe 1 out of the lower spray water pipe 1; the scale scraping part is arranged on the end face of the lower spray water pipe 1 far from the lower spray water soft connection pipe; the scale scraping part is used to scrape the scale on the inner wall of the lower spray water pipe 1 clean; the scale brushing part is arranged on the scale scraping part; the scale brushing part is used to clean the scale on the inner walls of each nozzle, and each nozzle on the lower spray water pipe 1 is arranged equidistantly at the top of the lower spray water pipe 1; the nozzle is a straight cylinder structure, so the rotating rod 22 can easily extend into the nozzle for cleaning.
[0017] The scale scraping part includes a rotating mechanism, a transverse moving mechanism and a scale scraping mechanism; the transverse moving mechanism is arranged on the end face of the lower spray water pipe 1 far from the lower spray water soft connection pipe, and the rotating mechanism is arranged on the transverse moving mechanism; the rotating mechanism can drive the scale scraping mechanism to rotate, and clean the scale on the inner wall of the lower spray water pipe 1 during the rotation of the scale scraping mechanism. The transverse moving mechanism enables the scale scraping mechanism to move along the length direction of the lower spray water pipe 1 during the rotation and scale scraping process, so as to comprehensively clean the inner wall of the lower spray water pipe; the scale scraping mechanism is located inside the lower spray water pipe 1 and is connected to the transverse moving mechanism.
[0018] The transverse movement mechanism includes a horizontal long plate 2, a first motor 3, a lead screw, a lead screw nut 4, a vertical plate, a first protective cover 5, and a vertical connection block; one end of the horizontal long plate 2 is arranged on the end face of the lower water spray pipe 1 far from the lower water spray flexible connection pipe, and the center line of the horizontal long plate 2 is parallel to the axis line of the lower water spray pipe 1; the cooling water sprayed by the lower water spray pipe on the slab in daily use comes from the supply of the lower water spray flexible connection pipe; the first motor 3 is arranged at one end of the upper end face of the horizontal long plate 2, the vertical plate is arranged at the other end of the upper end face of the horizontal long plate 2, one end of the lead screw is connected to the output shaft of the first motor 3, and the other end of the lead screw is pivotally connected to the vertical plate; the lead screw nut 4 is arranged on the lead screw; the first motor 3 can drive the lead screw to rotate, and the lead screw drives the lead screw nut to move along its axis line direction; a first infrared distance measuring instrument is arranged on the end face of the lead screw nut 4 close to the vertical plate, and the signal output end of the first infrared distance measuring instrument is connected to the signal input end of the CPU; the first infrared distance measuring instrument monitors the distance between it and the vertical plate in real time, thereby obtaining the real-time position of the lead screw nut, and finally obtaining the real-time position of the ring 11 in the lower water spray pipe; strip-shaped holes are arranged on the horizontal long plate 2 along its length direction, the vertical connection block passes through the strip-shaped holes of the horizontal long plate 2, and the top end face of the vertical connection block is connected to the bottom end face of the lead screw nut 4; the vertical connection block slides in the strip-shaped holes of the horizontal long plate 2, thereby driving the outer sealing cylinder 6 to slide synchronously; the first protective cover 5 is arranged on the horizontal long plate 2, and the first motor 3, the lead screw, the lead screw nut 4, and the vertical plate are all inside the first protective cover 5; the first protective cover 5 can prevent the first motor 3, the lead screw, and the lead screw nut 4 from contacting the cooling water; the signal input end of the first motor 3 is connected to the signal output end of the CPU.
[0019] The rotating mechanism includes an outer sealing cylinder 6, an end cover 7, a second motor 8, a fixed sealing cylinder 9 and a central axis 10; a circular hole is arranged at the center of the end face of the lower water spray pipe 1 away from the lower water spray soft connection water pipe, and a sealing ring is arranged on the inner wall of the circular hole, the central axis 10 passes through the circular hole, and the outer wall of the central axis 10 is in close contact with the sealing ring on the inner wall of the circular hole; the sealing ring arranged on the inner wall of the circular hole of the lower water spray pipe 1 penetrated by the central axis 10 can prevent the water in the lower water spray pipe 1 from overflowing from the circular hole as much as possible; an end cover 7 is arranged at the end of the outer sealing cylinder 6, and a second motor 8 is arranged at the center of the end face of the end cover 7 away from the outer sealing cylinder 6, and the output shaft of the second motor 8 passes through the side wall of the end cover 7 and is connected to the end of the central axis 10; the second motor 8 is used to drive the central axis 10 to rotate; the bottom end of the vertical connecting block The surface is connected with the circumferential outer wall of the outer sealing cylinder 6; when the vertical connecting block is driven to move by the screw nut, the vertical connecting block drives the outer sealing cylinder 6 to move synchronously; the axis line of the outer sealing cylinder 6, the axis line of the end cover 7, and the axis line of the center axis 10 coincide with each other; the fixed sealing cylinder 9 is arranged at the center of the end surface of the lower water spray pipe 1 away from the lower water spray soft connecting water pipe, and its circumferential outer wall is in close contact with the sealing ring on the circumferential inner wall of the outer sealing cylinder 6; when the sliding outer sealing cylinder 6 is sleeved on the outside of the fixed sealing cylinder 9, it forms a sealed space, which further avoids the overflow of cooling water from the center circular hole of the end surface of the lower water spray pipe 1 away from the lower water spray soft connecting water pipe; the axis line of the fixed sealing cylinder 9 coincides with the axis line of the outer sealing cylinder 6; the signal input end of the second motor 8 is connected to the signal output end of the CPU.
[0020] The scraping mechanism comprises a circular ring 11 and a scraping member; one end of the central axis 10 located inside the lower water spray pipe 1 is connected to the inner wall of the circular ring 11 through a bracket; the axis of the circular ring 11 coincides with the axis of the central axis 10; there are multiple scraping members, and they are evenly arranged on the circumferential outer wall of the circular ring 11; the rotating central axis 10 drives the circular ring 11 to rotate synchronously; the scraping member comprises a scraper 12 and a spring; strip holes are arranged on the circumferential outer wall of the circular ring 11, and the scraper 12 is inserted into the strip holes on the circumferential outer wall of the circular ring 11, the spring is arranged at the bottom end of the inner wall of the strip holes on the circumferential outer wall of the circular ring 11, and the spring is connected to the scraper 12, and the scraper 12 touches and presses on the inner wall of the lower water spray pipe 1; the spring provides a force for the scraper 12 to touch and press on the inner wall of the lower water spray pipe 1, ensuring that when the circular ring 11 rotates, the scraper 12 scrapes the scale on the inner wall of the lower water spray pipe 1.
[0021] The descaling part includes a first electric cylinder 13, a V-shaped long plate 14, a long fixing plate, a second infrared distance measuring instrument, a second protective cover 15, a support member 16 and a descaling mechanism; the first electric cylinder 13 is arranged on the top surface of the first protective cover 5 through a bracket, and the axis line of the piston rod of the first electric cylinder 13 is parallel to the axis line of the central shaft 10; the long fixing plate is arranged on the top surface of the first electric cylinder 13 along the length direction of the first electric cylinder 13; the V-shaped long plate 14 has its pointed part facing upward, and its bottom end is slidably arranged on the long fixing plate; the V-shaped long plate 14 can slide under the support and guidance of the long fixing plate; the function of the V-shaped long plate 14 is that during the daily water spraying and cooling process of the slab, the falling water flow naturally falls after contacting the V-shaped long plate 14, avoiding the cooling water directly contacting the first electric cylinder 13; the side wall of the second protective cover 15 is connected to the end of the V-shaped long plate 14, and the side wall of the second protective cover 15 is connected to the end of the piston rod of the first electric cylinder 13; the first electric cylinder 13 drives the second protective cover 15 and the descaling mechanism inside it to move synchronously; the second protective cover 15 protects the descaling mechanism; when the second protective cover 15 moves, it drives the V-shaped long plate 14 to move synchronously, and when the second protective cover 15 resets, the V-shaped long plate 14 naturally resets; a second infrared distance measuring instrument is arranged on the end surface of the long fixing plate close to the second protective cover 15, and the infrared emission end of the second infrared distance measuring instrument points to the second protective cover 15; the position of the second protective cover 15 can be monitored in real time through the second infrared distance measuring instrument, and then the position of the descaling mechanism can be known, and finally the real-time position of the rotating rod 22 can be known. By precisely controlling the position of the rotating rod 22, it can be accurately moved to the directly above of each nozzle, ensuring that the rotating rod 22 smoothly extends into each nozzle for cleaning; the second protective cover 15 is in the shape of a long strip-shaped square cylinder, and its opening faces vertically downward; the descaling mechanism is arranged inside the second protective cover 15; the support member 16 is arranged on the outer wall of the second protective cover 15; the signal input end of the first electric cylinder 13 is connected to the signal output end of the CPU; the signal output end of the second infrared distance measuring instrument is connected to the signal input end of the CPU.
[0022] The descaling mechanism includes an intermediate plate 17, a second electric cylinder 18, a guide plate 19, a third motor 20, a turntable 21, a rotating rod 22 and a wire brush 23; the intermediate plate 17 is arranged at the middle position on the inner wall of the second protective cover 15; the second electric cylinder 18 is arranged at the center position on the top surface of the intermediate plate 17; two guide holes are symmetrically arranged at both ends of the intermediate plate 17, and guide plates 19 are arranged in both guide holes; the output shaft of the third motor 20 is vertically downward, and the top surface of its housing is connected to the end of the piston rod of the second electric cylinder 18, and the top surface of the housing of the third motor 20 is connected to the bottom surface of the guide plate 19; the second electric cylinder 18 can drive the third motor 20 to vertically descend until the rotating rod 22 completely extends into the nozzle; the end of the output shaft of the third motor 20 is connected to the top surface of the turntable 21; the top surface of the rotating rod 22 is connected to the center of the bottom surface of the turntable 21; the wire brush is arranged on the circumferential outer wall of the rotating rod 22; the third motor 20 can drive the rotating rod 22 to rotate, so that the rotating rod 22 drives the wire brush to rotate after extending into the nozzle, and the wire brush cleans the inner wall of the nozzle; the signal input ends of the second electric cylinder 18 and the third motor 20 are both connected to the signal output end of the CPU.
[0023] The support member 16 includes a cross bar and a vertical bar; the number of the vertical bars is two, and they are symmetrically arranged at both ends of the cross bar, and the two vertical bars and one cross bar form a U shape; the center of the cross bar is connected to the second protective cover 15 through a bracket; two guide rails are arranged on the outer wall of the lower water spray pipe 1 along its length direction, and the two guide rails are symmetrically arranged on both sides of the nozzle of the lower water spray pipe 1; the bottom ends of the two vertical bars are respectively slidably arranged on the two guide rails; the combination of the vertical bar and the cross bar provides support for the front end of the second protective cover 15 to ensure its reliable displacement, and the support on the other side of the second protective cover 15 is provided by the V-shaped long plate 14.
[0024] The flushing part includes a water inlet joint, a water outlet joint, a first solenoid valve and a second solenoid valve 24; the water inlet joint is arranged on the side wall of the lower water spray pipe 1 and is on the same side wall as the lower water spray flexible connecting pipe, and the water inlet joint communicates with the inside of the lower water spray pipe 1; a first solenoid valve is arranged on the water inlet joint, and the first solenoid valve is communicated with the high-pressure water pipe through a long pipe; the water outlet joint is arranged on the side wall of the lower water spray pipe 1 away from the lower water spray flexible connecting pipe, and it communicates with the inside of the lower water spray pipe 1; the second solenoid valve 24 is arranged on the water outlet joint, and it is communicated with the drain port through a long pipe; the signal input ends of the first solenoid valve and the second solenoid valve 24 are both connected to the signal output end of the CPU.
[0025] In the present invention, the model of the CPU module is 87C196KC.
[0026] The present invention includes the following steps: In the standby state, the outer sealing cylinder 6 is sleeved outside the fixed sealing cylinder 9, and one end of the outer sealing cylinder 6 away from the end cover 7 is pressed against the side wall of the lower water spray pipe 1; the piston rods of the first electric cylinder 13 and the second electric cylinder 18 are both in the retracted state; when there is no slab passing by and it is necessary to clean the lower water spray pipe 1, the following operations are carried out: Step 1: Start the first electric cylinder 13 to push the scale scraping mechanism forward until the scale scraping mechanism moves directly above the first nozzle. The position of the scale scraping mechanism is accurately monitored by the second infrared rangefinder to ensure that it can move directly above each nozzle; after the rotating rod 22 moves directly above the first nozzle, the first electric cylinder 13 stops, and the second electric cylinder 18 and the third motor 20 are started to drive the rotating rod 22 to descend. The rotating rod 22 extends into the first nozzle, and the rotating wire brush 23 cleans the inner wall of the first nozzle. After the piston rod of the second electric cylinder 18 is fully extended and then retracted, after the piston rod of the second electric cylinder 18 is fully retracted, the first electric cylinder 13 continues to act until the rotating rod 22 moves directly above the second nozzle, and then the first electric cylinder 13 stops and the second electric cylinder 18 acts, and so on until all the nozzles are cleaned. After cleaning the last nozzle, the third motor 20 stops acting, and the first electric cylinder 13 resets to drive the rotating rod 22 back to the initial position; Step 2: The second motor 8 acts to drive the central shaft 10 to rotate, thereby driving the ring 11 to rotate. The scraping blades 12 on the outer wall of the rotating ring 11 scrape the scale on the inner wall of the lower water spray pipe 1 during rotation; at the same time, the first motor 3 acts to drive the lead screw to rotate, thereby driving the lead screw nut 4 to move. The lead screw nut 4 drives the outer sealing cylinder 6 to move synchronously, thereby driving the central shaft 10 and the scraping blades 12 thereon to move along the axis direction of the lower water spray pipe 1. This enables the scraping blades 12 on the ring 11 to also move laterally during rotation, so the scraping blades 12 move in a spiral on the inner wall of the lower water spray pipe 1 to scrape the scale on the inner wall of the lower water spray pipe 1 passing by along the way until the lead screw nut 4 moves to the end of the lead screw. At this time, the ring 11 also moves to the end of the lower water spray pipe 1; the position of the lead screw nut 4 can be monitored in real time through the first infrared rangefinder, and thus the position of the outer sealing cylinder 6 is known; after the ring 11 moves to the end, the first motor 3 rotates in reverse to drive the outer sealing cylinder 6 to reset and be sleeved outside the fixed sealing cylinder 9 again; Step 3: After the outer sealing cylinder 6 is in place, turn off the first motor 3 and the second motor 8; start the first solenoid valve and the second solenoid valve 24, and high-pressure water flows into the lower water spray pipe 1 and flushes its interior, and the water flow carries the scraped scale and discharges it from the water outlet joint.
Claims
1. A descaling device suitable for the lower spray pipe of laminar cooling of steel rolling, characterized by: The invention comprises a flushing part, a scraping part and a brushing part; the flushing part is arranged on the side walls at both ends of the lower water spray pipe (1); the scraping part is arranged on the end surface of the lower water spray pipe (1) away from the lower water spray flexible connecting water pipe; the brushing part is arranged on the scraping part; the scraping part comprises a rotating mechanism, a transverse movement mechanism and a scraping mechanism; the transverse movement mechanism is arranged on the end surface of the lower water spray pipe (1) away from the lower water spray flexible connecting water pipe, and the rotating mechanism is arranged on the transverse movement mechanism; the scraping mechanism is located inside the lower water spray pipe (1) and is connected to the transverse movement mechanism.
2. The descaling device for the lower water spray pipe of laminar cooling of steel rolling according to claim 1 is characterized in that: The transverse movement mechanism comprises a horizontal long plate (2), a first motor (3), a lead screw, a lead screw nut (4), a vertical plate, a first protective cover (5) and a vertical connection block; one end of the horizontal long plate (2) is arranged on the end surface of the lower water spray pipe (1) away from the lower water spray soft connection water pipe, and the center line of the horizontal long plate (2) is parallel to the axis center line of the lower water spray pipe (1); the first motor (3) is arranged at one end of the upper end surface of the horizontal long plate (2), the vertical plate is arranged at the other end of the upper end surface of the horizontal long plate (2), one end of the lead screw is connected to the output shaft of the first motor (3), and the other end of the lead screw is connected to the vertical plate axis; the lead screw nut (4) is arranged on the lead screw The vertical plate (2) is provided with a first infrared rangefinder on the end surface of the lead screw nut (4) close to the vertical plate, and the signal output end of the first infrared rangefinder is connected to the signal input end of the CPU; the horizontal long plate (2) is provided with strip holes along its length direction, the vertical connecting block passes through the strip holes of the horizontal long plate (2), and the top end surface of the vertical connecting block is connected to the bottom end surface of the lead screw nut (4); the first protective cover (5) is provided on the horizontal long plate (2), and the first motor (3), the lead screw, the lead screw nut (4) and the vertical plate are all located inside the first protective cover (5); the signal input end of the first motor (3) is connected to the signal output end of the CPU.
3. The descaling device for the lower water spray pipe of laminar cooling of steel rolling according to claim 2 is characterized in that: The rotating mechanism comprises an outer sealing cylinder (6), an end cover (7), a second motor (8), a fixed sealing cylinder (9) and a central shaft (10); a circular hole is arranged at the center of the end face of the lower water spray pipe (1) away from the lower water spray flexible connection water pipe, and a sealing ring is arranged on the inner wall of the circular hole, the central shaft (10) passes through the circular hole, and the outer wall of the central shaft (10) is in close contact with the sealing ring on the inner wall of the circular hole; an end cover (7) is arranged at the end of the outer sealing cylinder (6), and a second motor (8) is arranged at the center of the end face of the end cover (7) away from the outer sealing cylinder (6), and the output shaft of the second motor (8) passes through the side wall of the end cover (7). The end of the vertical connection block is connected to the circumferential outer wall of the outer sealing cylinder (6); the axis of the outer sealing cylinder (6), the axis of the end cover (7) and the axis of the central axis (10) coincide with each other; the fixed sealing cylinder (9) is arranged at the end center of the lower water spray pipe (1) away from the lower water spray soft connection water pipe, and its circumferential outer wall is in close contact with the sealing ring on the circumferential inner wall of the outer sealing cylinder (6); the axis of the fixed sealing cylinder (9) coincides with the axis of the outer sealing cylinder (6); the signal input end of the second motor (8) is connected to the signal output end of the CPU.
4. The descaling device for the lower water spray pipe of laminar cooling of steel rolling according to claim 3 is characterized in that: The scraping mechanism comprises a circular ring (11) and a scraping member; one end of the central axis (10) located inside the lower water spray pipe (1) is connected to the inner wall of the circular ring (11) through a bracket; the axis of the circular ring (11) coincides with the axis of the central axis (10); there are a plurality of scraping members, which are evenly arranged on the circumferential outer wall of the circular ring (11); the scraping member comprises a scraper blade (12) and a spring; a strip hole is arranged on the circumferential outer wall of the circular ring (11), and the scraper blade (12) is inserted into the strip hole on the circumferential outer wall of the circular ring (11); the spring is arranged at the bottom end of the inner wall of the strip hole on the circumferential outer wall of the circular ring (11), and the spring is connected to the scraper blade (12), and the scraper blade (12) contacts and presses against the inner wall of the lower water spray pipe (1).
5. The descaling device for the lower water spray pipe of laminar cooling of steel rolling according to claim 4 is characterized in that: The scale-brushing part comprises a first electric cylinder (13), a V-shaped long plate (14), a long fixed plate, a second infrared rangefinder, a second protective cover (15), a support (16) and a scale-brushing mechanism; the first electric cylinder (13) is arranged on the top surface of the first protective cover (5) through a bracket, and the axis of the piston rod of the first electric cylinder (13) is parallel to the axis of the central axis (10); the long fixed plate is arranged on the top surface of the first electric cylinder (13) along the length direction of the first electric cylinder (13); the tip of the V-shaped long plate (14) faces upward, and its bottom end is slidably arranged on the long fixed plate; the side wall of the second protective cover (15) is connected to the end of the V-shaped long plate (14), The side wall of the second protective cover (15) is connected to the end of the piston rod of the first electric cylinder (13); a second infrared rangefinder is arranged on the end surface of the long fixed plate close to the second protective cover (15), and the infrared emitting end of the second infrared rangefinder points to the second protective cover (15); the second protective cover (15) is in the shape of a long square cylinder, and its opening is vertically downward; the scale brushing mechanism is arranged in the second protective cover (15); the support member (16) is arranged on the outer wall of the second protective cover (15); the signal input end of the first electric cylinder (13) is connected to the signal output end of the CPU; and the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU.
6. The descaling device for the lower water spray pipe of laminar cooling of steel rolling according to claim 5 is characterized in that: The scale-brushing mechanism comprises an intermediate plate (17), a second electric cylinder (18), a guide plate (19), a third motor (20), a rotating disk (21), a rotating rod (22) and a wire brush (23); the intermediate plate (17) is arranged at a middle position of an inner wall of the second protective cover (15); the second electric cylinder (18) is arranged at a central position of a top end surface of the intermediate plate (17); guide holes are symmetrically arranged at both ends of the intermediate plate (17), and guide plates (19) are arranged in both guide holes; an output shaft of the third motor (20) is arranged The rotating rod (22) is vertically downward, and the top end surface of its housing is connected to the end of the piston rod of the second electric cylinder (18), and the top end surface of the housing of the third motor (20) is connected to the bottom end surface of the guide plate (19); the end of the output shaft of the third motor (20) is connected to the top end surface of the rotating disk (21); the top end surface of the rotating rod (22) is connected to the center of the bottom end surface of the rotating disk (21); the wire brush is arranged on the circumferential outer wall of the rotating rod (22); the signal input ends of the second electric cylinder (18) and the third motor (20) are both connected to the signal output end of the CPU.
7. The descaling device for the lower water spray pipe of laminar cooling of steel rolling according to claim 6 is characterized by: The support member (16) comprises a cross bar and a vertical bar; the number of the vertical bars is two, and they are symmetrically arranged at both ends of the cross bar, and the two vertical bars and one cross bar form a U shape; the center of the cross bar is connected to the second protective cover (15) through a bracket; the outer wall of the lower water spray pipe (1) is provided with two guide rails along its length direction, and the two guide rails are symmetrically arranged on both sides of the nozzle of the lower water spray pipe (1); the bottom ends of the two vertical bars are respectively slidably arranged on the two guide rails.
8. The descaling device for the lower water spray pipe of laminar cooling of steel rolling according to claim 7 is characterized in that: The flushing part comprises a water inlet joint, a water outlet joint, a first solenoid valve and a second solenoid valve (24); the water inlet joint is arranged on the side wall of the lower water spray pipe (1) and is located on the same side wall as the lower water spray soft connecting water pipe, and the water inlet joint is connected to the interior of the lower water spray pipe (1); the water inlet joint is provided with a first solenoid valve, and the first solenoid valve is connected to the high-pressure water pipe through a long pipe; the water outlet joint is arranged on the side wall of the lower water spray pipe (1) away from the lower water spray soft connecting water pipe, and is connected to the interior of the lower water spray pipe (1); the second solenoid valve (24) is arranged on the water outlet joint, and is connected to the drain outlet through the long pipe; the signal input ends of the first solenoid valve and the second solenoid valve (24) are both connected to the signal output end of the CPU.
9. A method for cleaning scale in a lower water spray pipe for laminar cooling of steel rolling according to any one of claims 1 to 8, characterized in that: The steps include: In the standby state, the outer sealing cylinder (6) is sleeved outside the fixed sealing cylinder (9), and the end of the outer sealing cylinder (6) away from the end cover (7) contacts and presses against the side wall of the lower water spray pipe (1); the piston rods of the first electric cylinder (13) and the second electric cylinder (18) are both in a retracted state; when no slab passes through and the lower water spray pipe (1) needs to be cleaned, the following operations are performed: Step 1: Start the first electric cylinder (13) to push the scale-brushing mechanism forward until it moves to the top of the first nozzle. The position of the scale-brushing mechanism is accurately monitored by a second infrared rangefinder to ensure that it can move to the top of each nozzle. After the rotating rod (22) moves to the top of the first nozzle, the first electric cylinder (13) stops, the second electric cylinder (18) and the third motor (20) start, driving the rotating rotating rod (22) downward, the rotating rod (22) extends into the first nozzle, and the rotating wire brush (23) cleans the inner wall of the first nozzle. After the piston rod of the second electric cylinder (18) is fully extended, it is retracted. After the piston rod of the second electric cylinder (18) is fully retracted, the first electric cylinder (13) continues to move until the rotating rod (22) moves to the top of the second nozzle, and then the first electric cylinder (13) stops and the second electric cylinder (18) moves, and this is repeated until all the nozzles are cleaned. After the last nozzle is cleaned, the third motor (20) stops and the first electric cylinder (13) is reset, driving the rotating rod (22) back to the initial position. Step 2: The second motor (8) is activated to drive the central shaft (10) to rotate, thereby driving the circular ring (11) to rotate, and the scraper (12) on the outer wall of the rotating circular ring (11) scrapes away the scale on the inner wall of the lower water spray pipe (1) during the rotation process; at the same time, the first motor (3) is activated to drive the lead screw to rotate, thereby driving the lead screw nut (4) to move, and the lead screw nut (4) drives the outer sealing cylinder (6) to move synchronously, thereby driving the central shaft (10) and the scraper (12) thereon to move along the axis of the lower water spray pipe (1), so that the scraper on the circular ring (11) (12) is also displaced laterally during the rotation process, so the scraper (12) moves in a spiral on the inner wall of the lower water spray pipe (1) to scrape off the scale on the inner wall of the lower water spray pipe (1) passing along the way, until the lead screw nut (4) moves to the end of the lead screw, at which time the ring (11) also moves to the end of the lower water spray pipe (1); the position of the lead screw nut (4) can be monitored in real time by the first infrared rangefinder, and the position of the outer sealing cylinder (6) can also be known; after the ring (11) moves to the end, the first motor (3) is reversed to drive the outer sealing cylinder (6) to reset and re-sleeve on the outer wall of the fixed sealing cylinder (9); Step 3: After the outer sealing cylinder (6) is in place, the first motor (3) and the second motor (8) are turned off; the first solenoid valve and the second solenoid valve (24) are started, and high-pressure water flows into the lower water spray pipe (1) to flush the interior thereof, and the water flow carries the scraped scale away and is discharged from the water outlet joint.