CN109423552B - Method for rapidly extracting continuous annealing strip steel - Google Patents

Abstract

The invention relates to a method for rapidly extracting and continuously withdrawing strip steel. The leash is attached to the string. The inlet and outlet loopers are used to build the sheet. After the tension is established, the two loopers are used as buffers. The water quenching tank to the outlet looper is penetrated with a traction belt to ensure the normal construction of the outlet looper and provide a guarantee for the subsequent linkage operation. From the exit looper to the coiling linkage operation, until all the strips are drawn out, the exit looper to the coiling keeps the traction belt running through. On the basis of the existing unit equipment, the invention utilizes the traction belt to connect the strip steel, makes full use of the tension rollers in each section of the continuous unloading furnace, and uses methods such as electrical signals to stably and quickly pull out the strip steel in the continuous unloading furnace, thereby creating favorable conditions for maintenance. condition. Through this method, the stripping operation of the whole line in the continuous unloading area can be completed within 8 hours.

Description

A method of quickly drawing out continuous strip steel

technical field

The invention relates to the field of iron and steel metallurgy, in particular to a method for rapidly drawing out continuous strip steel.

Background technique

When the continuous withdrawal unit is overhauled, in order to replace the furnace wall asbestos and white steel plates, as well as the roller change and other operations in the furnace, it is necessary to pull out the entire strip of the continuous withdrawal unit. Above 20 meters, the strip steel in the whole furnace reaches 2000-2400 meters. Quickly complete the stripping out of the whole line is the key work in the maintenance schedule.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a method for rapidly drawing out the continuous strip steel, making full use of the tension rollers in each section of the continuous stripping furnace, and using methods such as electrical signals to stably and rapidly extract the strip steel in the continuous stripping furnace, so that the Overhaul to create favorable conditions.

To achieve the above object, the present invention adopts the following technical solutions to realize:

A method for quickly drawing out continuous strip steel, which is completed according to the following steps:

1) The tail of the strip steel is used as a standard lead, and the strip is connected to one end of the traction belt, and the other end of the traction belt is connected to the string, and the string is wound on the fixed winch;

2) Manually laying the rope at the entrance section of the continuous and retreating unit, establishing tension in the cleaning section and the entrance looper, lifting the entrance looper, and threading the strip steel, traction belt and string into the entrance looper;

3) After the belt is drawn in the cleaning section, thread all the strings in the cleaning section, untie the string and the traction belt, cut the string after the 2#S roller in the cleaning section, keep the string in the cleaning section, and activate it at the entrance. Reconnect the remaining string on the hoist to the traction belt at the 3# rectifying roller;

4) Open the 3#S roller holding brake at the exit of the inlet looper, and the 3#S roller pressing roller adopts the maintenance mode. The machine is linked together, the strip runs at a speed of 30m-35/min, the strip is drawn in the furnace area, and at the same time, the rope is put at the 3# deflection roller at the entrance of the entrance looper, and the string is passed through the entrance looper;

5) When the belt drawing operation reaches the exit of the final cooling section, untie the traction belt and the string, leave the string at the inlet looper to the final cooling outlet of the furnace area, and use a U-shaped screw ring to connect the traction belt to another section of the traction belt. Connect, continue to link the outlet looper to the tail crimper, so that the traction belt goes through the water quenching tank to the outlet looper;

6) Continue the linkage operation from the exit looper to the coiling until all the strips are drawn out, and the traction belt runs through the exit looper to the coiling.

In step 5, if the traction belt deviates, a person needs to enter the furnace, and manually push the traction belt through the bottom of the furnace to correct the deviation manually, and always ensure that the traction belt and the string are in the middle of the furnace roller. The deviation of the string is too serious, so manually cut off the connection between the string and the traction belt, and then continue to connect the string after re-righting the traction belt.

Compared with the prior art, the beneficial effects of the present invention are:

On the basis of the existing unit equipment, use the traction belt to connect the strip steel, make full use of the tension rollers in each section of the continuous unwinding furnace, use electrical signals and other methods, and use the inlet and outlet loopers to build sheets. After the tension is established, two loopers are used as Buffer, through the lifting and lowering of the two loopers, the strip steel in the furnace area continuously penetrates the outlet looper. Stable and rapid extraction of the strip in the continuous unloading furnace creates favorable conditions for maintenance. Through this method, the stripping operation of the whole line in the continuous unloading area can be completed within 8 hours.

Detailed ways

Below in conjunction with embodiment, the present invention is further described:

The following examples illustrate the invention in detail. These examples merely describe the best embodiments of the present invention and do not limit the scope of the present invention.

Example

A method for quickly drawing out continuous strip steel, which is completed according to the following steps:

1. Prepare 3 400-meter traction belts and 3,000-meter thin ropes, wrap the traction belts and thin ropes on the hoist in advance, and use the fixed hoist to release the rope. The strip tail is used as a standard lead, connecting the strip with a 400-meter traction belt. The other end of the leash is connected to the string.

2. Before the strip drawing operation, ensure that the strip steel is in the center of the roll body, and all rectifying rollers are selected as "automatic". When the strip steel is drawn through a certain section of rectifying rolls, the rectifying roll is manually selected to be in the "neutral" state to ensure subsequent rectification. The roller no longer moves, preventing the traction belt and the string from being in the center of the roller body due to automatic deviation correction.

3. Manually laying the rope at the entrance section of the continuous and retreating unit, establishes tension in the cleaning section and the entrance looper, lifts the entrance looper, and thread the strip steel, traction belt and string into the entrance looper.

4. After the belt is drawn in the cleaning section, all the strings are inserted into the cleaning section. The rollers in the cleaning section are all rubber rollers, which have a large frictional force with the string. The spraying amount is distributed in each spray tank in the cleaning section. There are 8 electrode plates, the string is easy to hang on the spray beam and the electrode plate, and the roller system in the cleaning section causes the string to be stretched. Therefore, untie the string from the traction belt, cut the string after the 2#S roller in the cleaning section, keep the string in the cleaning section, and reconnect the remaining string on the hoist at the 3# rectifying roller of the inlet loop. towing belt connection;

5. Open the 3#S roller brake at the exit of the inlet looper, and open the 3#S roller pressing roller in maintenance mode. The outlet looper is set up to the tail coiler, and the furnace area is powered on to the tail coiler. The electrical personnel make the conditions so that the furnace area and the coiler are linked together, and the strip runs at a speed of 30m/min. At the same time, put the rope at the 3# deflection roller at the entrance of the entrance looper, and thread the string through the entrance looper. During the process of belt drawing in the furnace area, if the traction belt deviates, it is necessary to enter the furnace, and manually push the traction belt through the bottom of the furnace to correct the deviation manually, and always ensure that the traction belt and the string are in the middle of the furnace roller. If a certain section of the leash and the string deviates too seriously, you can manually cut the connection between the section of the string and the leash, and then re-center the leash and continue to connect the string.

6. When the belt drawing operation reaches the exit of the final cooling section, untie the 400-meter traction belt and the string here, leave the string at the inlet looper to the final cooling outlet of the furnace area, and connect the 400-meter traction belt with the remaining 800 meters. The belts are connected by a U-shaped screw iron ring, and the exit looper continues to be linked to the tail coiler, so that the water quenching tank to the exit looper is penetrated with a traction belt. Due to the narrow channel in the water quenching tank, for the convenience of wearing the belt, the traction belt is directly used to stay in the water quenching tank. Leaving the traction belt inside the export looper can ensure the normal construction of the export looper and provide guarantee for the subsequent linkage operation.

7. Continue the linkage operation from the exit looper to the coiling until all the strips are drawn out, and the traction belt runs through from the exit looper to the coiling.

Claims (2)

1. A method for rapidly extracting continuous annealing strip steel is characterized by comprising the following steps:

1) the method comprises the following steps that a strip steel tail is made into a standard strip head, strip steel is connected with one end of a traction belt, the other end of the traction belt is connected with a thin rope, and the thin rope is wound on a fixed winch;

2) manually releasing the rope at the inlet section of the continuous annealing unit, establishing tension between the cleaning section and the inlet loop, lifting the inlet loop, and penetrating the strip steel, the traction belt and the thin rope into the inlet loop;

3) after the cleaning section is drawn out, all the strings penetrate through the cleaning section, the strings and the traction belt are untied, the strings are cut off after the 2 nd group of S rollers of the cleaning section, the strings are reserved in the cleaning section, and the remaining strings on the winch are connected with the traction belt again at the 3 rd group of deviation correction rollers at the inlet of the inlet loop;

4) opening a band-type brake of a 3 rd group S roller at an outlet of the inlet loop, wherein the 3 rd group S roller adopts a maintenance mode, the outlet loop is connected to a tail coiling machine to establish tension, a furnace area is connected to the tail coiling machine to supply power, the furnace area is linked with the coiling machine, strip steel runs at the speed of 30m-35/min to draw strip in the furnace area, meanwhile, a rope is released at a 3 rd group deviation rectifying roller at the inlet of the inlet loop, and a thin rope penetrates into the inlet loop;

5) when the belt drawing operation is carried out to the outlet of the final cooling section, the traction belt and the thin rope are untied, the inlet loop is sleeved to the final cooling outlet of the furnace area, the thin rope is reserved, the traction belt is connected with the other traction belt by using a U-shaped screw buckle iron ring, the outlet loop is continuously sleeved to the tail part crimper for linkage, and the traction belt penetrates through the water quenching tank to reach the outlet loop;

6) and continuing to perform the linkage operation from the outlet loop to the coiling until the strip steel is completely drawn out, and keeping the traction belt to penetrate all the time from the outlet loop to the coiling.

2. The method for rapidly extracting the continuously-annealing steel strip according to claim 1, wherein in the step 5, the traction belt deviates, the traction belt is manually fed into the hearth, the furnace bottom roller is pushed and pulled to pass through the hearth for manual deviation correction, the traction belt and the string are always kept in the middle position of the furnace roller, if the string deviates seriously, the connection part of the string and the traction belt is manually cut off, the traction belt is righted again, and then the string is continuously connected.