On-line automatic detection and automatic paper blowing device of stainless steel finished product annealing and pickling unit

Abstract

The utility model relates to the field of on-line automatic detection of stainless steel continuous annealing and pickling units, in particular to an on-line automatic detection and automatic paper blowing device of a stainless steel finished product annealing and pickling unit, which comprises a turning roller, a blowing device, a broken paper detection device and a PLC (programmable logic controller), the valve and the broken paper detection device are connected with the PLC through electric signals, the blowing device 3 and the broken paper detection device are located on the two sides of the steel belt which is steered through the steering roller respectively, the portion, at the blowing device, of the steel belt is vertical, and the portion, at the broken paper detection device, of the steel belt is horizontal. After the steel belt leaves the steel coil, the PLC firstly detects whether craft paper exists on the steel belt or not through the broken paper detection device, if yes, the PLC controls the valve to be opened, and high-pressure gas enters the purging device through the high-pressure gas inlet pipe to purge and strip the craft paper.

Description

TECHNICAL FIELD

[0001] The utility model relates to stainless steel continuous annealing pickling unit online automatic detection field especially, it is a kind of online automatic detection automatic paper blowing device. BACKGROUND

[0002] Because the tension requirement of steel coil is different for different production processes in cold rolling mill, process paper is required to be inserted into the steel coil to prevent the rubbing between steel plates caused by tension matching problem, so as to ensure the surface quality of steel plate. For example, the patent with publication number CN101658880A discloses a wide steel coil slitting paper padding method, the width of the process paper is selected according to the width of the slitting finished steel coil, the width of the process paper is equal to the width of the slitting steel coil or within 5mm less than the width of the slitting steel coil; two paper padding machines are used to pad the process paper simultaneously; the process paper rolls are respectively threaded on the shafts of the two paper padding machines, the process paper rolls on the shafts of the two paper padding machines are placed divergently, the distance between the two paper rolls on the same shaft is equal to the width of the corresponding paper roll on the other shaft; the process paper rolls are respectively fixed on the shafts of the two paper padding machines by flanges; the shafts of the paper padding machines are in a necked state, when the coiler winds the steel strip, the process paper rolls can rotate freely on the shafts of the paper padding machines under the pulling of the process paper; then the process paper is padded into the steel coil, and then the winding is started.

[0003] However, the process paper is prone to aging and brittleness after the steel strip is rolled due to high temperature, and the process paper is easy to break, which may cause the paper breaking problem during the production of the finished annealing pickling unit, and the unit needs to be slowed down to re-perform the paper winding operation after the paper is broken. When the process paper is broken in the continuous annealing pickling unit, a series of problems such as quality defects, safety hazards and abnormal operation may be caused by the deceleration, shutdown or untimely disposal of the process section and the process paper being carried into the process section with the steel plate. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is how to realize the automatic detection of the broken paper of the steel coil, issue an alarm, and automatically control the broken paper and the separation of the steel plate.

[0005] The technical solution adopted by the utility model is as follows: a stainless steel finished annealing pickling unit online automatic detection automatic paper blowing device, which comprises a deflector 2, a blowing device 3, a broken paper detection device and a PLC controller 7, the blowing device 3 is connected with a high-pressure gas inlet pipe 6 provided with a valve, the valve and the broken paper detection device are electrically connected with the PLC controller 7, the blowing device 3 and the broken paper detection device are respectively arranged on the two sides of the steel strip 1 deflected by the deflector 2, the steel strip 1 at the blowing device 3 is vertical, and the steel strip 1 at the broken paper detection device is horizontal. After the steel strip leaves the steel coil, the PLC controller 7 first detects whether there is process paper on the steel strip through the broken paper detection device, if there is process paper, the PLC controller 7 controls the valve to be opened, high-pressure gas enters the blowing device 3 through the high-pressure gas inlet pipe 6 to blow and peel the process paper.

[0006] The paper breakage detection device includes a steel strip upper surface detection device 4 and a steel strip lower surface detection device 5. Both the steel strip upper surface detection device 4 and the steel strip lower surface detection device 5 are background suppression photoelectric sensors, and both consist of multiple background suppression photoelectric sensors arranged in parallel.

[0007] The purger 3 consists of two parallel pipes connected in a sealed manner. Each of the two parallel pipes corresponds to one side of the steel strip. A nozzle 8 is installed on each of the two parallel pipes. The nozzle 8 sprays air at an angle of 40°-45° downwards to the steel strip. During operation, the steel strip is conveyed vertically upwards through the purger 3.

[0008] The beneficial effects of this utility model are as follows: This utility model solves the problem of low accuracy in automatic paper break detection by the unit. In the existing technology, detection is performed by the infrared photoelectric sensor built into the unit. When the photoelectric sensor is blocked, the high-pressure nozzle cannot be opened in time. If the broken paper is brought under the steel plate, it is powerless to detect it. Therefore, the original infrared photoelectric sensor for detecting paper breaks has low accuracy. The stainless steel metallic color on the steel plate surface and the white of the craft paper form a very sharp contrast. Therefore, we searched for color classification and image recognition photoelectric sensors. After a long period of comparison and experimentation, we found that color mark photoelectric sensors and background suppression photoelectric sensors were more suitable. However, the detection distance of both is relatively short (within 10mm), which is not suitable for use on stainless steel strips (cold-rolled strips have various shapes such as large-belly plates, single-sided corrugations, and double-sided corrugations, with a maximum height exceeding 10mm). In order to utilize the performance of these photoelectric sensors, we finally selected a background suppression photoelectric sensor and increased its power, achieving a detection distance of over 30cm to meet the actual needs.

[0009] This invention solves the problem of the optimal paper-blowing angle for high-pressure air nozzles. Through long-term observation and research, it was found that while a 60° angle between the high-pressure air nozzle and the steel plate can quickly separate the paper from the plate, the separation area is limited, only separating paper within a certain range of the nozzle. At a 30° angle, some airflow fails to reach the steel plate, resulting in energy waste. Only when the angle is between 40° and 45° can the high-pressure air nozzle not only quickly separate and blow away the paper from the plate, but also provide a pre-peeling effect on paper that has not yet reached the nozzle's range.

[0010] This invention enables the unit to automatically detect paper breaks and automatically reduce and blow away paper during operation without stopping, ensuring stable operation of the process speed, reducing human-machine contact, and improving operational safety. Attached Figure Description

[0011] Fig. 1 This is a schematic diagram of the installation position of this utility model;

[0012] Fig. 2 It is high pressure nozzle structure schematic diagram of the utility model;

[0013] Among them, 1, steel belt, 2, deflection roller, 3, purger, 4, steel belt upper surface detection device, 5, steel belt lower surface detection device, 6, high pressure gas inlet pipe, 7, PLC controller, 8, nozzle. DETAILED DESCRIPTION

[0014] The stainless steel finished annealing pickling unit of a certain enterprise, after the steel coil is uncoiled, paper breakage needs to be monitored by an uncoiling worker, after paper breakage, the speed is reduced and the high pressure air is manually removed, and the human-machine contact is frequent, because the uncoiling speed is relatively fast, paper breakage cannot be found in the first time, and the process paper is often brought into the degreasing section and the upper loop, the process paper brought into the degreasing is mixed with water together, a paper paddle is formed, the nozzle is blocked, the degreasing is stopped, and the process paper brought into the loop is rolled on the rubber roller to form a bulge, which causes a press mark on the steel plate to form a surface defect. In order to solve the above problems, the equipment must be stopped, personnel enter the equipment, there is a great safety hazard, and the operation efficiency of the unit is affected.

[0015] As shown in Figs. 1-2 The utility model discloses a stainless steel finished annealing pickling unit online automatic detection automatic paper blowing device, including deflection roller 2 (prior art), purger 3, paper breakage detection device, PLC controller 7, the purger 3 is connected with the high pressure gas inlet pipe 6 of valve, the valve (air valve) and paper breakage detection device electric signal connection PLC controller 7. High pressure gas enters purger 3 in the blowing of high pressure gas inlet pipe 6.

[0016] The purger 3 is two parallel pipes that are connected together in a pipeline sealing mode, the two parallel pipes of the purger 3 correspond to two surfaces of the steel belt respectively, nozzles 8 are installed on the two parallel pipes of the purger 3, and the jet direction of the nozzles 8 is inclined downward and forms an angle of 40°-45° with the steel belt. During work, the steel belt runs and is conveyed in an upward vertical mode through the position of the purger 3.

[0017] The paper breakage detection device includes a steel belt upper surface detection device 4 and a steel belt lower surface detection device 5, the steel belt upper surface detection device 4 and the steel belt lower surface detection device 5 are background suppression photoelectric sensors, and the steel belt upper surface detection device 4 and the steel belt lower surface detection device 5 are a plurality of background suppression photoelectric sensors arranged side by side.

[0018] In the prior art, the paper breakage is detected by infrared light emission and photoelectricity, and when the photoelectricity is blocked, the high-pressure nozzle cannot be opened in time, and if the paper breakage enters the lower surface of the steel plate, it is helpless, so the accuracy of the original infrared light emission and photoelectricity detection device for detecting the paper breakage is low.

[0019] In one embodiment, the purger 3 is a runway-shaped annular pipe, two parallel long edge pipes of the purger 3 correspond to two surfaces of the steel strip respectively, nozzles 8 are installed on the two parallel long edge pipes of the purger 3, and the jet directions of the nozzles 8 are inclined downward and form an angle of 40°-45° with the steel strip.

[0020] The purger 3 and the paper breakage detection device are respectively located on two sides of the steel strip 1 turned by the turning roller 2, the steel strip 1 at the purger 3 is vertical, and the steel strip 1 at the paper breakage detection device is horizontal.

[0021] After the present application is used, the paper breakage can be immediately identified after passing through the detector, and a specific air blowing device is opened in linkage to remove the process paper, without speed reduction and stop, reducing human-machine contact, improving safety and operation efficiency.

[0022] A stainless steel finished annealing and pickling unit of an enterprise is provided with a high-pressure air blowing device after a uncoiler, and the high-pressure air blowing device blows paper, but cannot automatically identify whether the paper exists, so the high-pressure air blowing device needs to be opened for a long time to prevent the process paper from entering a subsequent process, but the high noise of the high-pressure air blowing device greatly affects the occupational health of workers and cannot completely blow away the paper breakage, and the long-time opening of the high-pressure air blowing device greatly consumes energy consumption.

[0023] The utility model discloses a kind of stainless steel finished annealing and pickling unit online automatic detection automatic paper blowing device, including turning roller 2, purger 3, paper breakage detection device, PLC controller 7, the purger 3 is connected with valve high-pressure gas import pipe 6, the valve and paper breakage detection device electric signal connection PLC controller 7.

[0024] The paper breakage detection device comprises a steel belt upper surface detection device 4 and a steel belt lower surface detection device 5, both of which are background suppression photoelectric sensors and are a plurality of background suppression photoelectric sensors arranged in parallel.

[0025] The purger 3 is two parallel pipes which are sealedly connected together by pipes, the two parallel pipes of the purger 3 correspond to two sides of the steel belt respectively, nozzles 8 are installed on the two parallel pipes of the purger 3, the jet directions of the nozzles 8 are inclined downward and the included angle with the steel belt is 40-45°. During working, the position of the steel belt passing through the purger 3 is vertical upward running.

[0026] The purger 3 and the paper breakage detection device are respectively arranged on two sides of the steel belt 1 which is turned by the turning roller 2, the steel belt 1 at the purger 3 is vertical, and the steel belt 1 at the paper breakage detection device is horizontal. After the steel belt leaves the steel roll, the PLC controller 7 firstly detects whether there is process paper on the steel belt through the paper breakage detection device, if there is, the PLC controller 7 controls the valve to be opened, high-pressure gas enters the purger 3 through the high-pressure gas inlet pipe 6 to blow the process paper and peel off the process paper.

[0027] After the paper breakage detection device is used, the high-pressure wind does not need to be opened for a long time, and is only opened when the paper is broken, and is automatically closed after the paper is cleaned, so that the energy consumption is saved, and the harm caused by the noise is reduced.

Claims

1. A stainless steel finished annealing pickling unit on-line automatic detection automatic paper blowing device, characterized in that: It includes a deflection roller (2), a purger (3), a paper break detection device, a PLC controller (7), the purger (3) is connected with a high-pressure gas inlet pipe (6) with a valve, the valve and the paper break detection device are electrically connected with the PLC controller (7), the purger (3) and the paper break detection device are respectively located at two sides of a steel belt (1) deflected by the deflection roller (2), the steel belt (1) at the purger (3) is vertical, and the steel belt (1) at the paper break detection device is horizontal; the paper break detection device includes a steel belt upper surface detection device (4) and a steel belt lower surface detection device (5), the steel belt upper surface detection device (4) and the steel belt lower surface detection device (5) are both background suppression photoelectric sensors, and are both multiple background suppression photoelectric sensors arranged in parallel.

2. The online automatic detection and automatic paper blowing device for stainless steel finished product annealing and pickling unit according to claim 1, characterized in that: The purger (3) is two parallel pipes which are sealed and connected together, the two parallel pipes of the purger (3) correspond to two surfaces of the steel belt respectively, nozzles (8) are installed on the two parallel pipes of the purger (3), and the jet directions of the nozzles (8) are inclined downward and form an angle of 40°-45° with the steel belt.

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