Multi-stage descaling treatment device for surface of steel strip in finish rolling area of hot rolling line

Abstract

The utility model discloses a multi-stage descaling treatment device for the surface of a steel strip in a finish rolling area of a hot rolling line. The multi-stage descaling treatment device comprises a rack, a conveying roller, a high-pressure water descaling mechanism, a steam descaling mechanism, a suction mechanism, a finish rolling unit and a runner, the plurality of finishing mill groups are uniformly distributed, and the rack is mounted between the adjacent finishing mill groups; the conveying roller is rotationally connected to the rack, the high-pressure water descaling mechanism and the steam descaling mechanism are installed on the upper side and the lower side of a steel belt, and the high-pressure water descaling mechanism is located on one side of the steam descaling mechanism; the suction mechanisms are positioned at two ends of the steel belt; the runner is fixed at the bottom of the rack; according to the utility model, the steel belt is impacted by high-pressure water, so that oxide skin on the steel belt can be washed away; the steam can quickly blow off water staying on the surface of the steel strip, so that the influence of large flow of the high-pressure water on the temperature reduction of the steel strip is reduced, and meanwhile, residual oxide skin can be blown off to improve the descaling effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of descaling for hot-rolled steel strip lines, and particularly relates to a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot-rolling line. Background Art

[0002] During the finishing rolling process of the steel strip, scale will be generated on the surface. If the scale is not removed, it will affect the service life of the rolling rolls and is also easily pressed into the surface of the strip during rolling, affecting its quality. It is necessary to remove the scale on the upper and lower surfaces of the steel billet by high-pressure water.

[0003] After retrieval, the prior art publication number CN219025416U discloses a combined high-pressure water descaling device, which includes a header mechanism. The header mechanism is assembled on the finishing descaling machine through a frame. It also includes an installation mechanism for providing adjustable installation for the header mechanism, a lifting mechanism for providing lifting support for the installation mechanism and the header mechanism, and a positioning mechanism for combining and connecting the installation mechanism and the lifting mechanism. The installation mechanism is located below the header mechanism, the lifting mechanism is located below the installation mechanism, and the positioning mechanism is located at the upper end of the lifting mechanism and at the end of the installation mechanism; its treatment process has the following disadvantages: when descaling the steel strip through the header mechanism, the scale in the middle of the steel strip will remain on the surface of the steel strip. During the finishing rolling of the steel strip, the remaining scale will be pressed into the surface of the steel strip, affecting the quality of the steel strip.

[0004] After retrieval, the prior art publication number CN114378122A discloses a descaling device, which includes at least one set of spray units arranged along the width direction of the hot-rolled slab. The spray unit includes spray components oppositely arranged on the upper and lower sides of the hot-rolled slab. The spray component includes a rotating shaft arranged along the width direction of the hot-rolled slab and extending out of the hot-rolled slab at both ends and rotatably connected to the support. The position of the rotating shaft corresponding to the hot-rolled slab is provided with a 360° rotating groove and a water inlet hole communicated with the rotating groove. A sleeve fixedly connected to the support is sleeved on the rotating shaft corresponding to the rotating groove. Seals are provided between both ends of the sleeve and the rotating shaft to form a dynamic seal; a plurality of water passing holes capable of communicating with the rotating groove are evenly spaced on the side of the sleeve facing the hot-rolled slab, and the water passing holes are connected with nozzles; its treatment process has the following disadvantages: during the high-pressure water descaling of the hot-rolled slab by the nozzles, the nozzles vertically spray on the surface of the hot-rolled slab, which will make the scale on the surface of some hot-rolled slabs tighter, resulting in poor descaling effect and affecting the quality of the hot-rolled slab. Summary of the Utility Model

[0005] The purpose of the present utility model is to overcome the deficiencies in the prior art and provide a multi-stage descaling treatment device for the surface of the steel strip in the finishing area of the hot rolling line. By impacting the steel strip with high-pressure water, the scale on the steel strip can be washed off; the steam can quickly blow off the water staying on the surface of the steel strip, thereby reducing the influence of the large flow rate of high-pressure water on the temperature reduction of the steel strip. At the same time, it can also blow off the remaining scale to improve the descaling effect.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is:

[0007] A multi-stage descaling treatment device for the surface of the steel strip in the finishing area of the hot rolling line includes a frame, conveying rollers, a high-pressure water descaling mechanism, a steam descaling mechanism, a suction mechanism, a finishing mill unit, and a flow channel; several finishing mill units are provided and evenly distributed, and the frame is installed between adjacent finishing mill units; the conveying rollers are rotatably connected to the frame, and the high-pressure water descaling mechanism and the steam descaling mechanism are both installed on the upper and lower sides of the steel strip, and the high-pressure water descaling mechanism is located on one side of the steam descaling mechanism; the suction mechanism is located at both ends of the steel strip, and the flow channel is fixed to the bottom of the frame; the steel strip is transported to the finishing mill unit through the conveying rollers for finishing, and the finished steel strip enters the high-pressure water descaling mechanism, and descaling is carried out by impacting with high-pressure water, and then the high-pressure water and scale on the steel strip are blown out of the steel strip by the steam descaling mechanism to prevent defects from occurring on the surface of the steel strip.

[0008] The high-pressure water descaling mechanism includes a support frame I, a water inlet pipe, a high-pressure water pipe, a nozzle I, a side conduit, and a side spray pipe; the support frame I is fixed to the frame and spans above the steel strip; the water inlet pipe is connected to the support frame I, and several high-pressure water pipes are evenly distributed on the water inlet pipe; the nozzle I is installed at the end of the high-pressure water pipe away from the water inlet pipe; both ends of the side conduit are connected to the water inlet pipes on the upper and lower sides of the steel strip, and side spray pipes are provided on the side conduit. The side spray pipes are flexible hoses, and side nozzles are provided at the ends of the side spray pipes away from the side conduit, and the side nozzles are located on one side of the steel strip; high-pressure water enters the high-pressure water pipe through the water inlet pipe, and then is sprayed onto the steel strip through the nozzle I, thereby washing off the scale on the steel strip; the high-pressure water in the water inlet pipe enters the side conduit and the side spray pipe, and then is sprayed onto the side wall of the steel strip through the side nozzles, thereby being able to wash off the scale on the side wall of the steel strip.

[0009] The nozzle I internally is provided with a housing, an electric push rod I, and a baffle; the housing is fixed to the inner side wall of the nozzle I, the electric push rod I is installed inside the housing, and the output end is provided with a baffle, and one end of the baffle is attached to the inner side wall of the nozzle I; the electric push rod I provides power to drive the baffle to move, and the baffle can control the opening of the nozzle I and further control the water spray amount.

[0010] The angle adjustment mechanism includes a fixed plate, an electric push rod II, a hoisting plate, and a connecting plate. The fixed plate is connected to the support frame I, and the electric push rod II is fixed on the fixed plate. The hoisting plate is fixedly connected to the output end of the electric push rod II. There are several connecting plates. One end of the connecting plate is fixed on the side wall of the hoisting plate, and the other end is connected to the high-pressure water pipe. The electric push rod II provides power to drive the hoisting plate and the connecting plate to move, and the connecting plate drives the high-pressure water pipe and the nozzle I to move, thereby adjusting the height of the nozzle I to further adapt to steel strips of different thicknesses.

[0011] A shielding plate is rotatably connected to the connecting plate through a rotating shaft. The shielding plate is inclined above the nozzle I. An electric push rod III is rotatably connected between the shielding plate and the hoisting plate. The electric push rod III provides power to drive the shielding plate to rotate around the rotating shaft, thereby adjusting the angle of the shielding plate so that the shielding plate can block the high-pressure water and prevent the high-pressure water from splashing after contacting the steel strip; reducing the influence of the high-pressure water flow on the surface temperature of the steel strip.

[0012] The suction mechanism includes a suction pipe, a suction box, a cross plate, and an electric push rod IV. There are a pair of electric push rods IV fixed on the support frame I and the support frame II respectively. The cross plate is fixed to the output end of the electric push rod IV. The suction box is installed on the side wall of the cross plate away from the electric push rod IV. One end of the suction pipe passes through the cross plate and is connected to the suction box, and the other end is connected to an external vacuum cleaner. The electric push rod IV provides power to drive the cross plate to move, and the cross plate drives the suction box to move, so as to adapt to steel strips of different widths. The vacuum cleaner provides power through the suction pipe and the suction box to suck the water flow and scale on the side of the steel strip, which can keep the residual scale away from the steel strip and prevent the subsequent finishing mill from pressing the residual scale into the steel strip, affecting the quality of the steel strip; at the same time, it can accelerate the flow rate of the water on the surface of the steel strip, prevent the high-pressure water from remaining on the steel strip and forming dirty marks, affecting the quality of the steel strip.

[0013] The steam descaling mechanism includes a support frame II, a bidirectional threaded rod, a moving plate, a motor I, a guide plate, a mounting plate, a conduit, a steam nozzle, and a nozzle II. The support frame II is fixed on the frame on one side of the support frame I. The two ends of the bidirectional threaded rod are rotatably connected to the side wall of the support frame II through bearings. The motor I is fixed on the support frame II, and the output end is connected to one end of the bidirectional threaded rod. The moving plate is threadedly connected to the bidirectional threaded rod. A connecting seat is provided on the moving plate, and a rotating shaft I is provided on the connecting seat. The guide plate is fixed on the support frame I, and a guide groove is provided on the guide plate. The mounting plate is in an I shape, and the top of the mounting plate is slidably connected in the guide groove of the guide plate. A placement plate and a rotating shaft II are provided on the mounting plate. The rotating shaft II is rotatably connected to the mounting plate and the placement plate. The two ends of the conduit are respectively rotatably connected to the rotating shaft I and the rotating shaft II, and a plurality of rotary joints are connected to the conduit. A plurality of steam nozzles are provided and are respectively connected to the corresponding rotary joints. A plurality of nozzles II are provided and are respectively connected to the corresponding steam nozzles. The motor I provides power to drive the bidirectional threaded rod to rotate, and the bidirectional threaded rod drives the moving plate to move through the thread. The moving plate drives one end of the conduit to move and simultaneously rotates the conduit. The conduit drives the mounting plate to move along the guide groove, thereby adjusting the angle between the conduit and the side of the steel strip, facilitating the nozzle to blow off the scale on the steel strip. Steam enters the steam nozzle through the conduit, and the nozzle II at one end of the steam nozzle sprays the steam onto the steel strip. The steam can quickly blow off the water staying on the surface of the steel strip, thereby reducing the influence of the large flow rate of high-pressure water on the temperature reduction of the steel strip. At the same time, it can also blow off the remaining scale to improve the descaling effect.

[0014] The rotating mechanism includes a motor II, a rack, a gear, and a support plate. The support plate is fixed on the rotating shaft I and the rotating shaft II. A pair of motor II is provided and symmetrically fixed at the bottom of the support plate. The output shaft passes through the support plate. A plurality of gears are provided and are respectively installed on the corresponding steam nozzles. The two ends of the rack are respectively connected to the corresponding motor output shafts, and the rack and the gear are meshed and connected. The motor II provides power to drive the rack to move, the rack drives the gear to rotate, and the gear drives the steam nozzle and the nozzle II to rotate, thereby adjusting the angles of the steam nozzle and the nozzle II, further ensuring that the jet direction of the nozzle II is perpendicular to the running direction of the steel strip. It is convenient for the high-pressure gas sprayed by the nozzle II to blow off the scale on the surface of the steel strip.

[0015] The adjusting mechanism includes a fixed frame, a lead screw, a central shaft, adjusting arms, a movable plate, a lead screw sleeve, and a motor III. The fixed frame is fixed on the steam spray pipe. The lead screw is rotatably connected to the fixed frame through bearings. The central shaft is connected to the side wall of the fixed frame. There are a pair of adjusting arms, symmetrically located on both sides of the fixed frame. One end of each adjusting arm is rotatably connected to both ends of the central shaft, and the other end is connected to both ends of the nozzle II through a rotating shaft. An activity groove is provided on the adjusting arm, and the movable plate is installed inside the activity groove. Both ends of the lead screw sleeve are rotatably connected to the corresponding movable plates and are threadedly connected to the lead screw. The motor III is fixed inside the fixed frame, and its output shaft is connected to one end of the lead screw. The motor III provides power to drive the lead screw to rotate. The lead screw drives the lead screw sleeve to move through the thread. The lead screw sleeve drives the adjusting arm to rotate around the central shaft through the movable plate, so that the adjusting arm drives the nozzle II to rotate, thereby adjusting the angle between the nozzle II and the steel strip, and further being able to adjust the impact force of the nozzle II on the residual high-pressure water and scale on the steel strip, so as to blow the scale on the surface of the steel strip into the flow channel.

[0016] The beneficial effects of the present utility model compared with the prior art are as follows:

[0017] 1) High-pressure water enters the high-pressure water pipe through the water inlet pipe and then is sprayed onto the steel strip through the nozzle I, thereby washing off the scale on the steel strip. The high-pressure water in the water inlet pipe enters the side conduit and the side spray pipe and then is sprayed onto the side wall of the steel strip through the side nozzle, thereby being able to wash off the scale on the side wall of the steel strip. The electric push rod I provides power to drive the baffle to move, and the baffle can control the opening of the nozzle I, and further can control the water spray volume. The electric push rod II provides power to drive the lifting plate and the connecting plate to move, and the connecting plate drives the high-pressure water pipe and the nozzle I to move, thereby adjusting the height of the nozzle I to further adapt to steel strips of different thicknesses.

[0018] 2) The motor I provides power to drive the bidirectional threaded rod to rotate. The bidirectional threaded rod drives the moving plate to move through the thread. The moving plate drives one end of the conduit to move and at the same time rotates the conduit. The conduit drives the mounting plate to move along the guiding groove, thereby adjusting the angle between the conduit and the side of the steel strip to facilitate the nozzle to blow off the scale on the steel strip. Steam enters the steam spray pipe through the conduit and is sprayed onto the steel strip by the nozzle II at one end of the steam spray pipe. The steam can quickly blow off the water staying on the surface of the steel strip, thereby reducing the influence of the large flow rate of high-pressure water on the temperature reduction of the steel strip. At the same time, it can also blow off the residual scale to improve the descaling effect.

[0019] 3) The motor II provides power to drive the rack to move. The rack drives the gear to rotate, and the gear drives the steam spray pipe and the nozzle II to rotate, thereby adjusting the angle of the steam spray pipe and the nozzle II to further ensure that the jet direction of the nozzle II is perpendicular to the running direction of the steel strip. It is convenient for the high-pressure gas sprayed by the nozzle II to blow off the scale on the surface of the steel strip.

[0020] 4) The motor Ⅲ provides power to drive the lead screw to rotate. The lead screw drives the nut sleeve to move through the thread. The nut sleeve drives the adjusting arm to rotate around the central axis through the movable plate, so that the adjusting arm drives the spray head Ⅱ to rotate, thereby adjusting the angle between the spray head Ⅱ and the steel strip. Further, the impact force of the spray head Ⅱ on the residual high-pressure water and scale on the steel strip can be adjusted, so that the scale on the surface of the steel strip can be blown into the flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. Figure 1 is a schematic structural view of a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model; Figure 1 ;

[0022] FIG. Figure 2 is a schematic structural view of a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model; Figure 2 ;

[0023] FIG. Figure 3 is a schematic structural view of a high-pressure water descaling mechanism in a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model;

[0024] FIG. Figure 4 is a schematic structural view of the spray head Ⅰ in a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model;

[0025] FIG. Figure 5 is a schematic structural view of a steam descaling mechanism in a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model;

[0026] FIG. Figure 6 is a schematic structural view of a rotating mechanism in a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model;

[0027] FIG. Figure 7 is a schematic structural view of an adjusting mechanism in a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model;

[0028] FIG. Figure 8 is a schematic structural view of a fixing frame in a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model;

[0029] FIG. Figure 9 is a schematic structural view of a mounting plate in a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model;

[0030] FIG. Figure 10 is a schematic structural view of a suction mechanism in a multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line of the present utility model;

[0031] In the figure: 1. Frame; 2. Conveyor roller; 3. High-pressure water descaling mechanism; 301. Support frame I; 302. Water inlet pipe; 303. High-pressure water pipe; 304. Nozzle I; 3041. Shell; 3042. Electric push rod I; 3043. Baffle; 305. Angle adjustment mechanism; 3051. Fixed plate; 3052. Electric push rod II; 3053. Hoisting plate; 3054. Connecting plate; 3055. Electric push rod III; 3056. Shield; 306. Side conduit; 307. Side spray pipe; 3071. Side nozzle; 4. Steam descaling mechanism; 401. Support frame II; 402. Bidirectional threaded rod; 403. Moving plate; 4031. Connecting seat; 4032. Rotating shaft I; 404. Motor I; 405. Guide plate; 4051. Guide groove; 406. Mounting plate; 4061. Placing plate; 4062. Rotating shaft II; 407. Rotating mechanism; 4071. Motor II; 4072. Rack; 4073. Gear; 4074. Support plate; 408. Adjusting mechanism; 4081. Fixed frame; 4082. Lead screw; 4083. Central shaft; 4084. Adjusting arm; 40841. Activity groove; 4085. Movable plate; 4086. Threaded sleeve; 4087. Motor III; 409. Conduit; 4091. Rotary joint; 410. Steam spray pipe; 411. Nozzle II; 5. Suction mechanism; 501. Suction pipe; 502. Suction box; 503. Cross plate; 504. Electric push rod IV; 6. Finishing mill unit; 7. Runner; 8. Steel strip. Detailed implementation mode

[0032] For the convenience of understanding by those skilled in the art, the technical solutions of the present invention will be further specifically described below in conjunction with the attached Figures 1 - 10 , and the technical solutions of the present utility model will be further specifically described.

[0033] A multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line performs multi-stage descaling on the steel strip in the finishing area through a descaling device. The specific method steps are as follows:

[0034] 1) Finishing: The steel strip is subjected to finishing treatment through a finishing mill unit;

[0035] 2) High-pressure water descaling: The steel strip after finishing is descaled through a high-pressure water descaling mechanism. High-pressure water enters the high-pressure water pipes on both sides of the steel strip through the water inlet pipe, and then is sprayed onto the steel strip through nozzle I. The high-pressure water sprayed by nozzle I impacts the scale on the surface of the steel strip, thereby achieving the effect of descaling; The high-pressure water in the water inlet pipe enters the side conduit and the side spray pipe, and then is sprayed onto the side wall of the steel strip through the side nozzle, so as to be able to wash away the scale on the side wall of the steel strip;

[0036] 3) Steam descaling: A steam descaling mechanism is provided. Steam enters the steam spray pipe through the conduit and is sprayed onto the steel strip by nozzle II at one end of the steam spray pipe. The steam can quickly blow off the water staying on the surface of the steel strip, and at the same time can also blow off the remaining scale;

[0037] 4) Suction descaling: Through the suction mechanism, the high-pressure water and scale on the side of the steel strip are sucked to accelerate the flow of the high-pressure water on the surface of the steel strip, further weakening the influence of the temperature of the high-pressure water flow on the surface of the steel strip on the finish rolling of the steel strip;

[0038] 5) Finish rolling: The steel strip is subjected to finish rolling treatment again by the finish rolling mill.

[0039] The descaling device includes a frame 1, a conveying roller 2, a high-pressure water descaling mechanism 3, a steam descaling mechanism 4, a suction mechanism 5, a finish rolling mill 6, and a flow channel 7; several finish rolling mills 6 are provided and evenly distributed, and the frame 1 is installed between adjacent finish rolling mills 6; the conveying roller 2 is rotatably connected to the frame 1, and both the high-pressure water descaling mechanism 3 and the steam descaling mechanism 4 are installed on the upper and lower sides of the steel strip 8, and the high-pressure water descaling mechanism 3 is located on one side of the steam descaling mechanism 4; the suction mechanism 5 is located at both ends of the steel strip 8, and the flow channel 7 is fixed to the bottom of the frame 1; the steel strip 8 is transported to the finish rolling mill 6 by the conveying roller 2 for finish rolling, and the finish-rolled steel strip 8 enters the high-pressure water descaling mechanism 3, and descaling is carried out by the impact of high-pressure water, and then the high-pressure water and scale on the steel strip 8 are blown out of the steel strip 8 by the steam descaling mechanism 4 to prevent defects from occurring on the surface of the steel strip 8.

[0040] The high-pressure water descaling mechanism 3 includes a support frame I 301, a water inlet pipe 302, a high-pressure water pipe 303, a nozzle I 304, a side conduit 306, and a side spray pipe 307; the support frame I 301 is fixed to the frame 1 and spans above the steel strip 8; the water inlet pipe 302 is connected to the support frame I 301, and several high-pressure water pipes 303 are evenly distributed on the water inlet pipe 302; the nozzle I 304 is installed at the end of the high-pressure water pipe 303 away from the water inlet pipe 302; both ends of the side conduit 306 are respectively connected to the water inlet pipes 302 on the upper and lower sides of the steel strip 8, and the side spray pipe 307 is provided on the side conduit 306. The side spray pipe 307 is a flexible pipe, and a side nozzle 3071 is provided at the end of the side spray pipe 307 away from the side conduit 306, and the side nozzle 3071 is located on one side of the steel strip 8; high-pressure water enters the high-pressure water pipe 303 through the water inlet pipe 302, and then is sprayed onto the steel strip 8 through the nozzle I 304, so as to wash away the scale on the steel strip 8; the high-pressure water in the water inlet pipe 302 enters the side conduit 306 and the side spray pipe 307, and then is sprayed onto the side wall of the steel strip 8 through the side nozzle 3071, so as to be able to wash away the scale on the side wall of the steel strip 8.

[0041] Inside the spray head Ⅰ 304, there are a housing 3041, an electric push rod Ⅰ 3042, and a baffle 3043. The housing 3041 is fixed on the inner side wall of the spray head Ⅰ 304. The electric push rod Ⅰ 3042 is installed inside the housing 3041, and the output end is provided with the baffle 3043. One end of the baffle 3043 is attached to the inner side wall of the spray head Ⅰ 304. The electric push rod Ⅰ 3042 provides power to drive the baffle 3043 to move, and the baffle 3043 can control the opening of the spray head Ⅰ 304, and further can control the water spray volume.

[0042] The angle adjustment mechanism 305 includes a fixed plate 3051, an electric push rod Ⅱ 3052, a hoisting plate 3053, and a connecting plate 3054. The fixed plate 3051 is connected to the support frame Ⅰ 301, and the electric push rod Ⅱ 3052 is fixed on the fixed plate 3051. The hoisting plate 3053 is fixedly connected to the output end of the electric push rod Ⅱ 3052. There are several connecting plates 3054. One end of the connecting plate 3054 is fixed on the side wall of the hoisting plate 3053, and the other end is connected to the high-pressure water pipe 303. The electric push rod Ⅱ 3052 provides power to drive the hoisting plate 3053 and the connecting plate 3054 to move, and the connecting plate 3054 drives the high-pressure water pipe 303 and the spray head Ⅰ 304 to move, so as to adjust the height of the spray head Ⅰ 304 and further adapt to steel strips 8 of different thicknesses.

[0043] A shielding plate 3056 is rotatably connected to the connecting plate 3054 through a rotating shaft. The shielding plate 3056 is obliquely arranged above the spray head Ⅰ 304. An electric push rod Ⅲ 3055 is rotatably connected between the shielding plate 3056 and the hoisting plate 3053. The electric push rod Ⅲ 3055 provides power to drive the shielding plate 3056 to rotate around the rotating shaft, so as to adjust the angle of the shielding plate 3056, so that the shielding plate 3056 can block the high-pressure water and prevent the high-pressure water from splashing after contacting the steel strip 8; reduce the influence of the high-pressure water flow on the surface temperature of the steel strip 8.

[0044] The suction mechanism 5 includes a suction pipe 501, a suction box 502, a horizontal plate 503, and an electric push rod IV 504. A pair of electric push rods IV 504 are fixed on the support frame I 301 and the support frame II 401 respectively. The horizontal plate 503 is fixed to the output end of the electric push rod IV 504. The suction box 502 is installed on the side wall of the horizontal plate 503 away from the electric push rod IV 504. One end of the suction pipe 501 passes through the horizontal plate 503 and is connected to the suction box 502, and the other end is connected to an external vacuum cleaner. The electric push rod IV 504 provides power to drive the horizontal plate 503 to move, and the horizontal plate 503 drives the suction box 502 to move, so as to adapt to steel strips 8 of different widths. The vacuum cleaner provides power through the suction pipe 501 and the suction box 502 to suck the water flow and scale on the side of the steel strip 8, which can keep the remaining scale away from the steel strip 8 and prevent the subsequent finishing mill 6 from pressing the remaining scale into the steel strip 8, affecting the quality of the steel strip 8. At the same time, it can accelerate the flow rate of the water flow on the surface of the steel strip 8, prevent the high-pressure water from remaining on the steel strip 8 to form dirty marks, and affect the quality of the steel strip 8.

[0045] The steam descaling mechanism 4 includes a support frame II 401, a bidirectional threaded rod 402, a moving plate 403, a motor I 404, a guide plate 405, a mounting plate 406, a conduit 409, a steam nozzle 410, and a nozzle II 411; the support frame II 401 is fixed on the frame 1 on one side of the support frame I 301, the two ends of the bidirectional threaded rod 402 are rotatably connected to the side wall of the support frame II 401 through bearings, the motor I 404 is fixed on the support frame II 401, and the output end is connected to one end of the bidirectional threaded rod 402; the moving plate 403 is threadedly connected to the bidirectional threaded rod 402, a connecting seat 4031 is provided on the moving plate 403, and a rotating shaft I 4032 is provided on the connecting seat 4031; the guide plate 405 is fixed on the support frame I 301, and a guide groove 4051 is provided on the guide plate 405; the mounting plate 406 is in an I shape, the top of the mounting plate 406 is slidably connected in the guide groove 4051 of the guide plate 405, a placing plate 4061 and a rotating shaft II 4062 are provided on the mounting plate 406; the rotating shaft II 4062 is rotatably connected to the mounting plate 406 and the placing plate 4061; the two ends of the conduit 409 are respectively rotatably connected to the rotating shaft I 4032 and the rotating shaft II 4062, and a plurality of rotary joints 4091 are connected to the conduit 409; a plurality of steam nozzles 410 are provided and are respectively connected to the corresponding rotary joints 4091; a plurality of nozzles II 411 are provided and are respectively connected to the corresponding steam nozzles 410; the motor I 404 provides power to drive the bidirectional threaded rod 402 to rotate, and the bidirectional threaded rod 402 drives the moving plate 403 to move through the thread; the moving plate 403 drives one end of the conduit 409 to move and simultaneously rotates the conduit 409; the conduit 409 drives the mounting plate 406 to move along the guide groove 4051, thereby adjusting the angle between the conduit 409 and the side of the steel strip 8, facilitating the nozzle II 411 to blow off the scale on the steel strip 8, and at the same time being able to adapt to steel strips of different widths; steam enters the steam nozzle 410 through the conduit 409 and is sprayed from the nozzle II 411 at one end of the steam nozzle 410 onto the steel strip 8, and the steam can quickly blow off the water staying on the surface of the steel strip 8, thereby reducing the influence of the large flow rate of high-pressure water on the temperature reduction of the steel strip 8, and at the same time being able to blow off the remaining scale to improve the descaling effect.

[0046] The rotation mechanism 407 includes a motor II 4071, a rack 4072, a gear 4073, and a support plate 4074. The support plate 4074 is fixed on the rotation shaft I 4032 and the rotation shaft II 4062. There are a pair of motors II 4071, symmetrically fixed at the bottom of the support plate 4074, and the output shafts pass through the support plate 4074. A number of gears 4073 are respectively installed on the corresponding steam nozzles 410. Both ends of the rack 4072 are respectively connected to the output shafts of the corresponding motors II 4071, and the rack 4072 is in meshing connection with the gear 4073. The motor II 4071 provides power to drive the rack 4072 to move, the rack 4072 drives the gear 4073 to rotate, and the gear 4073 drives the steam nozzle 410 and the nozzle II 411 to rotate, so as to adjust the angles of the steam nozzle 410 and the nozzle II 411, and further ensure that the jet direction of the nozzle II 411 is perpendicular to the running direction of the steel strip 8. It is convenient for the high-pressure gas ejected by the nozzle II 411 to blow off the scale on the surface of the steel strip 8.

[0047] The adjustment mechanism 408 includes a fixing frame 4081, a lead screw 4082, a central shaft 4083, an adjustment arm 4084, a movable plate 4085, a lead screw sleeve 4086, and a motor III 4087. The fixing frame 4081 is fixed on the steam nozzle 410. The lead screw 4082 is rotatably connected to the fixing frame 4081 through a bearing. The central shaft 4083 is connected to the side wall of the fixing frame 4081. There are a pair of adjustment arms 4084, symmetrically located on both sides of the fixing frame 4081. One end of the adjustment arm 4084 is rotatably connected to both ends of the central shaft 4083, and the other end is connected to both ends of the nozzle II 411 through a rotating shaft. An activity groove 40841 is provided on the adjustment arm 4084, and the movable plate 4085 is installed inside the activity groove 40841. Both ends of the lead screw sleeve 4086 are rotatably connected to the corresponding movable plates 4085 and are threadedly connected to the lead screw 4082. The motor III 4087 is fixed inside the fixing frame 4081, and the output shaft is connected to one end of the lead screw 4082. The motor III 4087 provides power to drive the lead screw 4082 to rotate. The lead screw 4082 drives the lead screw sleeve 4086 to move through the thread. The lead screw sleeve 4086 drives the adjustment arm 4084 to rotate around the central shaft 4083 through the movable plate 4085, so that the adjustment arm 4084 drives the nozzle II 411 to rotate, thereby adjusting the angle between the nozzle II 411 and the steel strip 8. Further, the impact force of the nozzle II 411 on the residual high-pressure water and scale on the steel strip 8 can be adjusted, so that the scale on the surface of the steel strip 8 can be blown into the flow channel.

[0048] A multi-stage descaling treatment device for the surface of a steel strip in the finishing area of a hot rolling line has the following working process: The steel strip 8 is transported to the finishing mill 6 by the transport rollers 2 for finishing. After finishing, the steel strip 8 enters the high-pressure water descaling mechanism 3. The high-pressure water enters the high-pressure water pipe 303 through the water inlet pipe 302, and then is sprayed onto the steel strip 8 through the nozzle I 304, so as to wash off the scale on the steel strip 8; The high-pressure water in the water inlet pipe 302 enters the side conduit 306 and the side spray pipe 307, and then is sprayed onto the side wall of the steel strip 8 through the side nozzle 3071, so as to be able to wash off the scale on the side wall of the steel strip 8; Then the steam in the steam descaling mechanism 4 enters the steam spray pipe 410 through the conduit 409, and is sprayed onto the steel strip 8 by the nozzle II 411 at one end of the steam spray pipe 410. The steam can quickly blow off the water staying on the surface of the steel strip 8, so as to reduce the influence of the large flow rate of the high-pressure water on the temperature reduction of the steel strip 8. At the same time, it can also blow off the remaining scale to improve the descaling effect; Prevent defects from occurring on the surface of the steel strip 8.

[0049] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention.

Claims

1. A multi-stage descaling treatment device for the surface of a steel strip in a finishing rolling zone of a hot rolling line, comprising a frame, a transport roller, a high-pressure water descaling mechanism, a steam descaling mechanism, a suction mechanism, a finishing rolling unit, and a flow channel; the finishing rolling unit is provided with a plurality of evenly distributed ones, and the frame is installed between adjacent finishing rolling units; the transport roller is rotatably connected to the frame, characterized in that The high-pressure water descaling mechanism and the steam descaling mechanism are both installed on the upper and lower sides of the steel belt, and the high-pressure water descaling mechanism is located on one side of the steam descaling mechanism; the suction mechanism is located at both ends of the steel belt, and the flow channel is fixed at the bottom of the frame; The high-pressure water descaling mechanism includes a support frame I, a water inlet pipe, a high-pressure water pipe, a nozzle I, a side guide tube, and a side spray pipe; the support frame I is fixed on the frame and spans above the steel belt; the water inlet pipe is connected to the support frame I, and the high-pressure water pipe is provided with a plurality of nozzles evenly distributed on the water inlet pipe; the nozzle I is installed at the end of the high-pressure water pipe away from the water inlet pipe; the two ends of the side guide tube are respectively connected to the water inlet pipes on the upper and lower sides of the steel belt, and the side guide tube is provided with a side spray pipe, which is a hose, and the end of the side spray pipe away from the side guide tube is provided with a side spray head, and the side spray head is located on one side of the steel belt; The steam descaling mechanism includes a support frame II, a bidirectional threaded rod, a moving plate, a motor I, a guide plate, a mounting plate, a conduit, a steam spray pipe, and a spray head II; Support frame II is fixed on the frame on one side of support frame I, and both ends of the two-way threaded rod are rotatably connected to the side wall of support frame II through bearings. Motor I is fixed on support frame II, and the output end is connected to one end of the two-way threaded rod; the movable plate is connected to the two-way threaded rod through threads, and a connecting seat is provided on the movable plate, and a rotating shaft I is provided on the connecting seat; the guide plate is fixed on support frame I, and a guide groove is provided on the guide plate; the mounting plate is in an I-shape, and the top of the mounting plate is slidably connected in the guide groove of the guide plate, and a placement plate and a rotating shaft II are provided on the mounting plate; the rotating shaft II is rotatably connected to the mounting plate and the placement plate; both ends of the conduit are respectively rotatably connected to the rotating shaft I and the rotating shaft II, and the conduit is connected to a number of rotary joints; a number of steam nozzles are provided, which are respectively connected to the corresponding rotary joints; a number of nozzles II are provided, which are respectively connected to the corresponding steam nozzles.

2. The multi-stage descaling treatment device for the surface of a steel strip in a finishing rolling zone of a hot rolling line according to claim 1, characterized in that The nozzle I is provided with a shell, an electric push rod I and a baffle inside; the shell is fixed on the inner wall of the nozzle I, the electric push rod I is installed inside the shell, and a baffle is provided at the output end, and one end of the baffle is attached to the inner wall of the nozzle I.

3. The multi-stage descaling treatment device for the surface of a steel strip in a finishing rolling zone of a hot rolling line according to claim 1, characterized in that The angle adjustment mechanism includes a fixed plate, an electric push rod II, a hanging plate, and a connecting plate; the fixed plate is connected to the support frame I, and the electric push rod II is fixed to the fixed plate; the hanging plate is fixedly connected to the output end of the electric push rod II, and the connecting plate is provided with a plurality of connecting plates, one end of the connecting plate is fixed to the side wall of the hanging plate, and the other end is connected to the high-pressure water pipe.

4. The multi-stage descaling treatment device for the surface of a steel strip in a finishing rolling zone of a hot rolling line according to claim 1, characterized in that A shield plate is rotatably connected to the connecting plate through a rotating shaft, and the shield plate is tiltedly arranged above the nozzle I; an electric push rod III is rotatably connected between the shield plate and the hanging plate.

5. The multi-stage descaling treatment device for the surface of steel strip in the finishing zone of a hot rolling line according to claim 1, characterized in that The rotating mechanism includes a motor II, a rack, a gear, and a support plate; the support plate is fixed on the rotating shaft I and the rotating shaft II, a pair of motors II are symmetrically fixed on the bottom of the support plate, the output shaft passes through the support plate, a number of gears are respectively installed on the corresponding steam nozzles, the two ends of the rack are respectively connected to the corresponding motor output shaft, and the rack and the gear are meshed.

6. The multi-stage descaling treatment device for the surface of steel strip in the finishing zone of a hot rolling line according to claim 1, characterized in that The adjusting mechanism comprises a fixed frame, a lead screw, a central axis, an adjusting arm, a movable plate, a threaded sleeve and a motor III; the fixed frame is fixed on the steam nozzle, the lead screw is rotatably connected to the fixed frame through a bearing, the central axis is connected to the side wall of the fixed frame, a pair of adjusting arms are provided, symmetrically located on both sides of the fixed frame, one end of the adjusting arm is rotatably connected to both ends of the central axis, and the other end is connected to both ends of the nozzle II through a rotating shaft; a movable groove is provided on the adjusting arm, the movable plate is installed inside the movable groove, both ends of the threaded sleeve are rotatably connected to the corresponding movable plates, and are connected to the lead screw through threads; the motor III is fixed inside the fixed frame, and the output shaft is connected to one end of the lead screw.

7. The multi-stage descaling treatment device for the surface of steel strip in the finishing zone of a hot rolling line according to claim 1, characterized in that The suction mechanism includes a suction pipe, a suction box, a horizontal plate, and an electric push rod IV; the electric push rod IV is fixed with a pair, which are respectively fixed on a support frame I and a support frame II; the horizontal plate is fixed at the output end of the electric push rod IV, the suction box is installed on the side wall of the horizontal plate away from the electric push rod IV, one end of the suction pipe passes through the horizontal plate to be connected to the suction box, and the other end is connected to an external vacuum cleaner.

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