CN202270739U - Water mist temper rolling spraying device in cold rolling wet temper rolling production - Google Patents

Abstract

The utility model relates to a water mist temper rolling spraying device in a cold rolling wet temper rolling production. The water mist temper rolling spraying device in the cold rolling wet temper rolling production is characterized by comprising a water mist spraying beam, a telescoping mechanism, and a temper rolling mist spraying device; wherein the temper rolling mist spraying device is fixed on the water mist spraying beam, the water mist spraying beam is connected with a connecting crossbeam through the telescoping mechanism, two ends of the connecting crossbeam are respectively fixed on a frame of a wet temper mill; the temper rolling mist spraying device comprises 7 to 11 nozzles, an air header pipe, and a temper rolling liquid header pipe; spouts of the all nozzles are towards a gap between a working roll and a supporting roller; air input ends of the nozzles are communicated with the air header pipe through air branch pipes, temper rolling liquid input ends of the nozzles are communicated with the temper rolling liquid header pipe through temper rolling liquid branch pipes; and the nozzles are provided with mixing valves. The water mist temper rolling spraying device of the utility model can solves the quality defect of temper rolling liquid residue caused by channeling of the temper rolling liquid.

Description

Water mist leveling injection device in cold rolling wet leveling production

technical field

The utility model belongs to the technical field of cold-rolling and leveling, in particular to a water mist leveling injection device in cold-rolling wet-leveling production, which is applied to various cold-rolling and leveling units.

Background technique

The traditional wet leveling process is to spray leveling liquid to the entrance roll gap of the work roll of the tempering machine through the leveling liquid injection beam, and then blow a large amount of compressed air through the air purge beam at the exit of the tempering machine, and use the purge compression Air to remove the remaining leveling liquid on the surface of the strip (as shown in Figure 1).

As shown in Figure 1, in the wet skinning production process of the traditional wet skinning process, in the body 1 of the four-roller skin skinning machine, the pressing cylinder 2 presses against the support roll 3, the support roll 3 presses the work roll 4, and the work roll 4 drives The back-up rollers 3 are driven to rotate together and the strip steel 6 is tempered and rolled. During the temper rolling process, the leveling liquid injection beam 5 fixed on the welding bracket 8 sprays the leveling liquid between the work roll 4 and the strip 6 at the entrance of the temper machine, washes the dust on the surface of the work roll and the strip, and provides work roll lubrication and Keep the surface of the strip steel clean, and then spray high-flow compressed air through the compressed air at the exit of the temper machine to purge the injection beam 7 to remove the residual leveling liquid on the surface of the strip steel.

Although the traditional wet tempering process can solve most of the tempering dust problems, in the tempering production, since the width of the rolled strip is often smaller than the designed maximum strip width, the tempering liquid flows through the two sides of the strip to the surface of the finished strip , causing strip surface contamination. For example, the designed work roll length is 1510mm, and the maximum rollable strip width is 1380mm, but 90% of the actual rolled strip width is 1200mm or less. During the rolling process, the leveling liquid can easily flow to the surface of the finished strip through the gap on both sides of the strip, and the channeling leveling liquid will cause surface quality defects of the product. Moreover, during the temper rolling process, a large amount of temper liquid is sprayed onto the strip surface, requiring a large amount of compressed air blowing to remove water stains and oil stains on the finished strip surface, and the compressed air blowing consumes a large amount of electric energy.

Therefore, there are technical defects in the wet skinning process in the traditional cold rolling skinning process.

Contents of the invention

The purpose of the utility model is to provide a water mist leveling spraying device in cold rolling wet leveling production, which can solve the residual quality defects of leveling liquid caused by channeling of leveling liquid.

In order to achieve the above object, the technical solution of the utility model is: a water mist leveling spray device in cold rolling wet leveling production, which is characterized in that it includes a water mist spray beam, a telescopic mechanism, and a leveling mist spraying device; the leveling mist spraying device is fixed on On the water mist spraying beam, the water mist spraying beam is connected with the connecting beam by a telescopic mechanism, and the two ends of the beam are respectively fixed on the frame of the wet tempering machine;

The leveling mist spraying device includes a nozzle, an air main pipe, and a leveling liquid main pipe; the air main pipe and the leveling liquid main pipe are arranged along the axis of the work roll, and the air main pipe and the leveling liquid main pipe are fixed on the water mist spraying beam, and one end of the air main pipe is closed , the other end of the air main pipe is connected with the air delivery hose, one end of the leveling liquid main pipe is closed, and the other end of the leveling liquid main pipe is connected with the leveling liquid delivery hose; the number of the nozzles is 7 to 11, all The nozzle of the nozzle faces the roll gap between the work roll and the back-up roll; the air input end of the nozzle is connected with the air main pipe through the air branch pipe, and the leveling liquid input end of the nozzle is connected with the leveling liquid main pipe through the leveling liquid branch pipe. mixing valve;

Described telescopic mechanism comprises hydraulic cylinder, base plate, slide bar, chute plate, and the bottom of base plate is fixed on the connecting crossbeam, and base plate is provided with chute plate, and one end of slide bar passes through the chute on chute plate and connects with The water mist spraying beam is hinged; the cylinder body of the hydraulic cylinder is connected with the base plate by the hydraulic cylinder seat, and the piston rod of the hydraulic cylinder is hinged with the water spraying beam.

The nozzle is located 200-400 mm away from the roll gap between the work roll and the backup roll.

Beneficial effects of the utility model: due to the use of water mist spraying beams, and the spraying position is moved from the roll gap where the work rolls contact the strip to the roll gap where the work rolls contact the backup rolls, the mist leveling liquid directly faces the work rolls Spraying at the gap between the backup roll and the back-up roll (not spraying at the gap between the work roll and the strip steel), will not cause the problem of leveling liquid channeling, and solve the residual quality defect of the leveling liquid caused by the channeling of the leveling liquid (the problem of leveling liquid residue) , effectively avoiding the quality defect caused by channeling of the pass-through liquid from both sides of the strip to the surface of the finished strip, and creating conditions for reducing or even canceling high-energy-consuming compressed air blowing. At the same time, mist leveling liquid is sprayed between the work roll and the back-up roll, which can fully lubricate the work roll and back-up roll surface and protect the surface roughness of the roll.

Description of drawings

Figure 1 is a schematic diagram of traditional wet leveling.

Fig. 2 is a structural schematic diagram of the water mist leveling spraying device of the present invention (position in the wet leveling machine).

Fig. 3 is a top view of the water mist leveling spraying device of the present invention.

Fig. 4 is a structural schematic diagram of the nozzle of the present invention.

In the figure: 1- four-roll skin pass mill body; 2- pressing cylinder; 3- support roll; 4- work roll; 5- wet leveling spray beam; 6- strip steel; -welding bracket; 9-anti-vibration roller; 10-water spray beam; 11-hydraulic cylinder; 12-bottom plate; 13-sliding rod; 14-chute plate; Wrinkle roller, 18-nozzle, 19-mixing valve, 20-air main pipe, 21-leveling liquid main pipe, 22-air delivery hose, 23-leveling liquid delivery hose. Arrows in the figure indicate rolling directions.

Detailed ways

As shown in Figure 2, the water mist leveling spraying device in the wet leveling production of cold rolling includes a water mist spraying beam 10, a telescopic mechanism, and a leveling mist spraying device; the leveling mist spraying device is fixed on the water mist spraying beam 10, and the water mist The spray beam 10 is connected to the connecting beam 15 by a telescopic mechanism, and the two ends of the beam 15 are respectively fixed on the frame 16 of the wet tempering machine;

As shown in Fig. 3 and Fig. 4, described leveling mist injection device comprises nozzle 18, air main pipe 20, leveling liquid main pipe 21; Consistent with the length direction of the work roll), the air main pipe 20 and the leveling liquid main pipe 21 are all fixed on the water spray beam 10, and one end of the air main pipe 20 is closed, and the other end of the air main pipe 20 is connected with the air delivery hose 22 (air delivery hose provides air source), one end of the leveling liquid main pipe 21 is closed, and the other end of the leveling liquid main pipe 21 is connected with the leveling liquid delivery hose 22 (the leveling liquid delivery hose provides leveling liquid); the individual nozzles 18 The number is 7 to 11 (the specific number is determined according to the needs, and the nozzles are evenly distributed), and the nozzles of all nozzles 18 are facing the roll gap between the work roll 4 and the back-up roll 3; The leveling liquid input end of the nozzle 18 is connected with the leveling liquid main pipe 21 by the leveling liquid branch pipe, and the nozzle 18 is provided with a mixing valve 19 (the mixing valve is used to adjust the flow of air and leveling liquid flowing into the nozzle 18, and can also be called regulating valve);

Described telescopic mechanism comprises hydraulic cylinder 11, base plate 12, slide bar 13, chute plate 14, and the bottom of base plate 12 is fixed (welded) on connecting beam 15, and base plate 12 is provided with chute plate 14, and the bottom of slide bar 13 One end passes through the chute (or slide hole) on the chute plate 14 and is hinged with the water mist spray beam 10 (for stability, each slide bar passes through 2 chute plates; 2 slide bars are set, respectively located in the hydraulic cylinder The cylinder body of the hydraulic cylinder 11 is connected with the base plate 12 by the hydraulic cylinder seat, and the piston rod of the hydraulic cylinder 11 is hinged with the water spray beam 10. The piston rod of hydraulic cylinder 11 expands and contracts, drives water mist injection beam 10, nozzle 18 expansion and contraction, when support roll changes roll, water mist injection beam 10 is retracted, and during rolling production, water mist injection beam 10 is stretched out.

A water mist leveling method in cold rolling wet leveling production, it comprises the following steps:

1) Install a water mist leveling injection device on the entrance side of the wet tempering machine. The nozzle of the nozzle of the water mist leveling injection device faces the roll gap between the work roll and the backup roll, and the nozzle is located 200 meters away from the roll gap between the work roll and the backup roll. ~400mm (the distance from the nozzle to the roll gap is 200~400mm);

2) When the temper rolling of the wet temper machine starts, the nozzle sprays misty leveling liquid (leveling mist); when the temper rolling ends, the nozzle stops spraying.

The nozzle is provided with an air input port and a leveling liquid input port, and a mixing valve for adjusting the flow rate of the air and the leveling liquid is provided on the nozzle; when the wet leveling machine starts rolling, input compressed air and leveling liquid into the nozzle, open And adjust the mixing valve so that the flow rate of the leveling liquid flowing into each nozzle is 10-44.7L/h (the leveling liquid is existing), and the air flow rate flowing into each nozzle is 5.2-13m ³ /h (the air pressure is 1.5- 5.5bar), the leveling liquid and compressed air are mixed at the nozzle, and sprayed out as aerosol through the nozzle nozzle; when the leveling rolling is finished, stop the delivery of compressed air and leveling liquid, and close the mixing valve.

During the leveling production process, the leveling mist is sprayed to the gap between the entrance work roll and the back-up roll through the nozzles arranged on the water mist spraying beam 10, and the leveling mist captures the dust on the surface of the strip above the anti-wrinkle roller 17 and the dust generated during the production process. Leveling dust prevents dripping onto the surface of the strip to pollute the surface of the strip and rolls; the leveling liquid sprayed between the roll gaps can lubricate the work rolls and backup rolls at the same time, and ensure the surface roughness of the rolls during the leveling production process. Since the leveling mist will not fall on the surface of the strip to cause pollution, the strip purging can be canceled between the work roll 4 and the anti-vibration roll 9 on the exit side.

Experiment: 10 hours of continuous temper rolling for comparison experiment. By adopting the device (method) of the present invention, no residual smooth spots appear on the surface of the steel strip. However, in the traditional wet leveling spraying method, a small amount of residual leveling spots appear on the surface of the strip. It shows that by changing the leveling liquid injection beam and the leveling liquid injection position, the leveling liquid residual quality defect (leveling liquid residual problem) caused by the leveling liquid channeling is solved, the pollution is reduced, and the surface quality of the leveled product is improved.

Claims (2)

1. The water mist leveling spraying device in cold rolling wet leveling production is characterized in that it includes a water mist spraying beam, a telescopic mechanism, and a leveling mist spraying device; the leveling mist spraying device is fixed on the water mist spraying beam, and the water mist spraying beam is formed by a The mechanism is connected with the connecting beam, and the two ends of the beam are respectively fixed on the frame of the wet tempering machine; The leveling mist spraying device includes a nozzle, an air main pipe, and a leveling liquid main pipe; the air main pipe and the leveling liquid main pipe are arranged along the axis of the work roll, and the air main pipe and the leveling liquid main pipe are fixed on the water mist spraying beam, and one end of the air main pipe is closed , the other end of the air main pipe is connected with the air delivery hose, one end of the leveling liquid main pipe is closed, and the other end of the leveling liquid main pipe is connected with the leveling liquid delivery hose; the number of the nozzles is 7 to 11, all The nozzle of the nozzle faces the roll gap between the work roll and the back-up roll; the air input end of the nozzle is connected with the air main pipe through the air branch pipe, and the leveling liquid input end of the nozzle is connected with the leveling liquid main pipe through the leveling liquid branch pipe. mixing valve; Described telescopic mechanism comprises hydraulic cylinder, base plate, slide bar, chute plate, and the bottom of base plate is fixed on the connecting crossbeam, and base plate is provided with chute plate, and one end of slide bar passes through the chute on chute plate and connects with The water mist spraying beam is hinged; the cylinder body of the hydraulic cylinder is connected with the base plate by the hydraulic cylinder seat, and the piston rod of the hydraulic cylinder is hinged with the water mist spraying beam. 2. The water mist tempering spraying device in cold rolling wet tempering production according to claim 1, characterized in that: the nozzle is located 200-400 mm away from the gap between the work roll and the back-up roll.

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