CN202270708U - Water mist flattening suction dedusting system in cold rolling wet flattening production - Google Patents

Abstract

The utility model relates to a system for processing mist and dust produced in flattening production. A water mist flattening suction dedusting system in cold rolling wet flattening production comprises an anti-twist guide plate which is located on an outlet side of a wet flattening machine; the system is characterized in that: a hollow channel is arranged in the anti-twist guide plate; the lower port of the anti-twist guide plate is a first air suction opening; the first air suction opening is located above a strip steel passing line; the upper port of the anti-twist guide plate is communicated with one end of an air suction pipe on the outlet side; the other end of the air suction pipe on the outlet side is communicated with a main air suction pipe; the main air suction pipe is connected with an air suction fan; an inlet side of the wet flattening machine is provided with an inlet-side air suction pipe; the inlet-side air suction pipe is fixedly connected with a rack through a fixing beam; the lower port of the inlet-side air suction pipe is a second air suction opening; the second air suction opening is located on a working roller surface and a strip steel surface; and the upper port of the inlet-side air suction pipe is communicated with the main air suction pipe. The system can improve the suction effect and reduce the suction energy consumption.

Description

Water mist leveling suction dust removal system 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 system for processing mist and dust generated in the leveling production by adopting a suction dust removal method, and is applied to various cold-rolling and leveling units.

Background technique

Traditional leveling production includes dry leveling and wet leveling. The dry skinning process will generate a lot of dust during the skinning process. During the wet skinning production process, a large amount of mist will be generated due to the spraying of the wet skinning. If the dust and fog cannot be discharged in time, it will pollute the surface of the strip and affect the surface roughness of the roll. . Traditionally, a suction tuyere is arranged on the inlet and outlet sides above the enclosure to suck the dust inside the frame, and the dry leveling also arranges the first tuyere 15 at the lower end of the anti-winding guide plate to suck the dust on the surface of the work roll.

As shown in Figure 1, in the traditional dry skin-passing production process, the first air outlet 15 arranged at the lower end of the anti-winding guide plate sucks the dust from the roll gap of the rolled work roll and the surface of the strip, and the inlet and outlet sides above the closed cover are respectively arranged The third air outlet 17 and the fourth air outlet 18 suck the dust in the frame.

As shown in Figure 2, in the traditional wet leveling production process, the leveling liquid is sprayed on the inlet side to wash the dust on the surface of the work roll and the strip, and the air inlets (the third air outlet 17, the fourth air outlet) arranged on the inlet and outlet sides above the closed cover are respectively arranged. Port 18) to suck the dust and mist in the frame. Although the traditional leveling suction dust removal process can suck and discharge part of the dust and mist, but because the suction tuyere arranged above the closed cover is too high, it cannot achieve a good effect, and there are still a lot of mist and dust in the production process. Bring defects to the strip surface and affect product quality. And because the tuyere arranged on the closed cover is too high, the power requirement of the suction fan is relatively high, which consumes a large amount of electric energy.

Contents of the invention

The purpose of the utility model is to provide a water mist leveling suction and dust removal system in cold rolling wet leveling production, which can improve the suction effect.

In order to achieve the above purpose, the technical solution of the utility model is: the water mist leveling suction and dust removal system in the cold rolling wet leveling production, which includes an anti-winding guide plate, which is located at the outlet side of the wet leveling machine, and two movable hydraulic cylinders The piston rods are respectively hinged to the anti-winding guide plate, and the cylinder body of the movable hydraulic cylinder is connected with the frame by the hydraulic cylinder seat; The exhaust port is located above the strip passing line, the upper port of the anti-winding guide plate is connected to one end of the exhaust pipe on the outlet side, the other end of the exhaust pipe on the outlet side is connected to the main exhaust pipe, and the main exhaust pipe is connected to the exhaust fan. Connected; the entrance side of the wet tempering machine is provided with an inlet side exhaust pipe, which is fixedly connected with the frame by a fixed beam, and the lower port of the inlet side exhaust pipe is the second air outlet, which is located at At the surface of the work roll and the steel strip, the second air outlet is 100-200mm away from the work roll surface, the second air outlet is 50-200mm away from the strip surface, and the upper port of the air inlet pipe is connected to the main air pipe.

The first air outlet is 50-200mm away from the strip steel passing line.

Remove the third air outlet 17 on the entrance side and the fourth air outlet 18 on the outlet side above the closed cover of the wet tempering machine, and use the first air outlet at the lower end of the anti-winding guide plate on the outlet side to suck the surface of the rolled strip and the rolls. Dust at the seam, redesign the suction device on the inlet side (inlet side exhaust pipe), extend the second air outlet 16 of the suction device to the surface of the work roll and the surface of the strip, 100-200mm away from the surface of the work roll (from The closest distance to the working roll surface is 100-200mm), and 50-200mm away from the strip steel surface. It is used to suck the mist surrounded by dust and the surface dust of the incoming strip steel by spraying water mist to solve the dust pollution on the entrance side and ensure the belt Clean steel surfaces.

The beneficial effects of the utility model: by changing the suction tuyere and redesigning the suction position (moving the suction tuyere to the vicinity of the roll and the surface of the strip, and sucking the mist and dust at the surface of the roll where the dust is directly generated), it is not only guaranteed to remove The strip steel surface and roll dust generated after rolling at the exit side also solves the suction of the raw material strip steel surface dust at the entrance side, and the discharge of dust particles surrounded by mist after water mist spraying, fully ensuring the strip steel and roll surface during the smoothing process clean. This can not only improve the suction effect and ensure the cleanness of the strip steel surface during the smooth production process, but also reduce the power of the suction fan and save power consumption.

Description of drawings

Figure 1 is a schematic diagram of a traditional dry leveling ventilation and dust removal system.

Figure 2 is a schematic diagram of a traditional wet leveling ventilation and dust removal system.

Fig. 3 is a schematic diagram of the water mist leveling suction dust removal system of the present invention.

Fig. 4 is a top view of the water mist leveling suction and dust removal system of the utility model.

In the figure: 1-temper body; 2-support roll; 3-work roll; 4-strip steel; 5-anti-winding guide plate; 6-wet leveling spray beam; 7-active hydraulic cylinder; Tube; 9-water mist leveling spray beam; 10-inlet side exhaust pipe; 11-fixed beam; 12-frame; 13-anti-wrinkle roller; 14-anti-vibration roller; Two air outlets; 17-the third air outlet; 18-the fourth air outlet. Arrows in the figure indicate rolling directions.

Detailed ways

As shown in Figure 3 and Figure 4, the water mist leveling suction and dust removal system in cold rolling wet leveling production includes anti-wrapping guide plate 5, inlet side exhaust pipe 10 (suction device), anti-wrapping guide plate 5 is located in wet leveling On the outlet side of the machine (the left side of the work roll in Fig. 3), the piston rods of the two movable hydraulic cylinders 7 are respectively hinged to the anti-winding guide plate 5, and the cylinder body of the movable hydraulic cylinder 7 is connected with the frame 12 by the hydraulic cylinder seat; Wrap guide plate 5 is a hollow passage, the lower port of anti-wrap guide plate 5 is the first air intake 15, the first air intake 15 is positioned at the top of the strip passing line (the position of the horizontal strip in the figure is the strip passing line ; Promptly close to the surface of the strip steel 4), the first air outlet 15 is 50-200mm away from the strip steel passing line (that is, the distance between the first air outlet and the surface of the strip steel is 50-200mm), the upper port and the outlet side of the anti-winding guide plate 5 are drawn One end of the air duct 8 is connected, and the other end of the outlet side exhaust duct 8 is communicated with the main exhaust duct, and the main exhaust duct is connected with the exhaust fan; Dust on the steel surface, when the work roll is changed, the anti-winding guide plate 5 is withdrawn by the movable hydraulic cylinder 7, and then stretched out during rolling production; The inlet side exhaust pipe 10 is fixedly connected with the frame 12 by the fixed beam 11, the lower port of the inlet side exhaust pipe 10 is the second air outlet 16, and the second air outlet 16 is located on the working roll surface and At the strip surface, the second air outlet 16 is 100-200mm away from the work roll surface (the closest distance from the work roll surface is 100-200mm), the second air outlet 16 is 50-200mm away from the strip surface, and the inlet side air duct 10 The upper port is connected with the main exhaust pipe.

The water mist spray beam 9 sprays flat mist to catch the dust, and then it is sucked by the second air outlet 16 of the air exhaust pipe 10, and the air suction pipe on the inlet side also sucks the dust brought by the raw material on the surface of the strip steel on the anti-wrinkle roller 13 , to ensure the cleanliness of the raw material strip. Outlet side exhaust duct 8 and inlet side exhaust duct 10 are merged into total exhaust duct behind the enclosing cover of top leveler, and total exhaust duct is connected with exhaust fan.

The water mist leveling suction and dust removal method in cold rolling wet leveling production includes the following steps: 1) The anti-wrapping guide plate on the outlet side of the wet leveling machine is used as a hollow channel inside, and the lower port of the anti-wrapping guide plate is the first air outlet, The first air outlet is 50-200mm away from the strip passing line, the upper port of the anti-winding guide plate is connected with one end of the exhaust pipe on the outlet side, and the other end of the air pipe on the outlet side is connected with the main air pipe, and the main air pipe It is connected with the exhaust fan; the inlet side of the wet temper machine is provided with an inlet side exhaust pipe, and the lower port of the inlet side exhaust pipe is the second air outlet, the second air outlet is located at the surface of the work roll and the strip steel surface, the The air outlet is 100-200mm away from the work roll surface, the second air outlet is 50-200mm away from the strip steel surface, and the upper port of the air inlet pipe is connected to the main air pipe;

2) When the temper rolling of the wet temper mill starts, the exhaust fan (exhaust fan) is started, the first air outlet sucks the dust on the surface of the rolled strip and the gap between the rolls, and the second air outlet sucks the water mist leveling spray device The nozzle sprays mist-like leveling liquid (leveling mist) to surround the dust and the surface dust of the strip incoming material; when the leveling rolling is completed, the exhaust fan is stopped.

During the skinning production process, the nozzle of the water mist leveling spraying device (including the water mist spraying beam) sprays the leveling mist to the gap between the backup roll and the working roll, and uses the sprayed mist to catch the dust diffused during the leveling process. The suction tuyere is redesigned on the inlet side. The tuyere is close to the surface of the roll and close to the strip. It can not only suck the dust near the surface of the roll, but also suck the dust brought by the raw material on the surface of the strip to prevent the dust on the surface of the raw material from entering the rolling area and contaminating the roll. On the outlet side, use the opening at the lower end of the anti-winding guide plate as the suction air outlet, close to the surface of the strip, to suck the dust on the surface of the rolled strip and the surface of the roll. In this way, the new suction process method not only ensures the cleanness of the strip and roll surfaces after rolling, but also prevents the dust on the surface of the raw strip steel from entering the rolling and contaminating the rolls, thereby ensuring the cleanliness of the strip steel surface during the temper rolling process.

Experiment: 10 hours of continuous temper rolling for comparison experiment. By adopting the method of the utility model, the dust and mist in the wet tempering machine are sucked away, no chaotic phenomenon of dust and mist occurs, and the surface of the rolled strip steel is clean. However, in the traditional wet leveling and exhaust dust removal, dust and mist are scattered, and there is dust on the surface of the rolled strip, and a small amount of residual leveling spots appear. It shows that the utility model can improve the suction effect, and the effect is remarkable.

The wet leveling spray beam is a part of the water mist leveling spray device, and the generation of leveling fog:

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); the number of the nozzles is 7～11;

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 5.2-13m3/h (the air pressure is 1.5-5.5 bar), the leveling liquid and compressed air are mixed at the nozzle, and sprayed out as aerosol through the nozzle opening; when the leveling rolling is completed, the delivery of compressed air and leveling liquid is stopped, and the mixing valve is closed.

Claims (2)

1. the smooth suction dust pelletizing system of water smoke in the cold rolling wet smooth production, it comprises the anti-guide plate that twines, and prevents twining the outlet side that guide plate is positioned at wet planisher, and it is hinged that the piston rod of 2 movable hydraulic cylinders prevents twining guide plate respectively, and the cylinder body of movable hydraulic cylinder is linked to each other with frame by the hydraulic cylinder seat; It is characterized in that: anti-twining is hollow passageway in the guide plate; The anti-lower port that twines guide plate is first suction opeing; First suction opeing is positioned at the top of band steel through line; The anti-port that twines guide plate is connected with an end of outlet side exhaust column, and the other end of outlet side exhaust column is connected with total exhaust column, and total exhaust column links to each other with the exhausting blower fan; The entrance side of wet planisher is provided with the entrance side exhaust column; The entrance side exhaust column is fixedly connected with frame by fixed cross beam; The lower port of entrance side exhaust column is second suction opeing, and second suction opeing is positioned at work roll surface and belt steel surface place, and second suction opeing is from work roll surface 100～200mm; Second suction opeing is from belt steel surface 50～200mm, and the port of entrance side exhaust column is connected with total exhaust column.

2. the smooth suction dust pelletizing system of water smoke in the cold rolling wet smooth production according to claim 1, it is characterized in that: first suction opeing passes through line 50-200mm apart from the band steel.

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