Chain type electromagnetic iron oxide scale adsorption device and method

Abstract

The invention discloses a chained electromagnetic iron oxide scale adsorption device and a chained electromagnetic iron oxide scale adsorption method. The device comprises two electromagnet chains which are mounted on a stepped rubber wheel, and the rubber wheel is driven by a motor to rotate; each electromagnet chain is composed of a wear-resistant rubber belt, an electrified electric brush and a plurality of electromagnets. When the electromagnet chain moves, the upper half circle of electromagnet makes contact with the electrified electric brush to generate electromagnetism, and oxide scales on the surface of strip steel are attracted. And when rotating to the lower half circle, the electromagnet is not in contact with the electric brush, so that the electromagnet is powered off and demagnetized, the oxide scale automatically falls off, and finally, the oxide scale is recovered by the collecting device. The device has the beneficial effects that scales on the upper and lower surfaces of strip steel are effectively removed, and the steel surface quality is improved; dust pollution is reduced; and the scale can be continuously adsorbed and collected, so that the cleaning efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of waste recovery in the steel industry, and in particular relates to a chain-type electromagnetic adsorption device and method for oxidized iron scale. Background Art

[0002] In the steel production process, especially in the process of hot rolling to cold rolling and heat treatment, scale will inevitably appear on the surface of steel. Scale will not only affect the surface quality of steel, but also bring dust pollution. For example, in the pickling cold rolling production line, the scale on the surface of the strip is destroyed by the straightening machine to prepare for pickling. However, during the descaling process of the straightening machine, the scale is broken and crushed by the rollers, causing the scale to splash everywhere. Even if multiple sets of purge devices are used, the scale will accumulate and crush the surface of the strip to produce pits during the straightening process, and it will also bring dust pollution.

[0003] Chinese patent CN109570246A discloses a device and method for removing iron oxide from the surface of cold-straightened steel plates. The laser rangefinder located above the outlet of the cold-straightening machine detects the thickness of the steel plate straightened by the cold-straightening machine and sends the detection signal to the PLC. According to the measured thickness, the PLC controls the servo motor to operate and lower the electromagnet to the corresponding height. When the head of the running strip triggers the front grating, the PLC controls the electromagnet to be energized, and the iron oxide on the surface of the steel plate is adsorbed on the electromagnet. When the tail of the running strip triggers the rear grating, the PLC controls the electromagnet to lose power and start demagnetization, and the iron oxide adsorbed on the electromagnet falls into the collection box. This patent eliminates the scratch defects on the surface of the steel plate after cold straightening, and does not require blowing, no noise, no dust, and is green and environmentally friendly. However, this patent can only absorb the iron oxide scale on the upper surface of the steel plate, but not the iron oxide scale on the lower surface of the steel plate. In actual production, a part of the iron oxide scale will be absorbed to the lower surface of the strip, causing the surface quality of the strip to deteriorate. In addition, a steel plate can only be demagnetized and the iron oxide scale can be dropped once. For a strip of hundreds of meters long, there may be a problem of too much iron oxide scale accumulation and no time to dump it. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to propose a new chain-type electromagnetic adsorption device and method for iron oxide scale. The present invention can effectively remove iron oxide scale from the upper and lower surfaces of the strip, improve the surface quality of the steel, reduce dust pollution, and the iron oxide scale can be continuously adsorbed and collected, thereby improving its cleaning efficiency.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme.

[0006] The present invention provides a chain-type electromagnetic adsorption device for oxidized iron sheets, which comprises two rubber wheels, the rubber wheels being stepped. The invention relates to a rubber wheel having a plurality of rubber wheels and a plurality of rubber wheels having a plurality of rubber wheels. The rubber wheel has a plurality of rubber wheels and a plurality of rubber wheels having a plurality of rubber wheels. The rubber wheel has a plurality of rubber wheels and a plurality of rubber wheels having a plurality of rubber wheels. The rubber wheel has a plurality of rubber wheels and a plurality of rubber wheels having a plurality of rubber wheels. The rubber wheel has a plurality of rubber wheels and a plurality of rubber wheels having a plurality of rubber wheels. The rubber wheel has a plurality of rubber wheels and a plurality of rubber wheels having a plurality of rubber wheels.

[0007] In the present invention, the rubber wheel is connected to the motor, and the motor drives the rubber wheel to rotate.

[0008] In the present invention, a scraper is arranged near the lower wear-resistant rubber belt installed on the large-diameter wheel, and the scraper is arranged on a supporting structure near the lower wear-resistant rubber belt.

[0009] The present invention also provides a method for using the above-mentioned chain-type electromagnetic adsorption oxidized iron scale device, comprising the following steps: (1) When the rubber wheel rotates, the electromagnet on the wear-resistant rubber belt contacts the energized brush to generate electromagnetic force, which absorbs the oxidized iron scale on the surface of the strip steel. The electromagnet on the wear-resistant rubber belt installed on the large-diameter wheel absorbs the oxidized iron scale on the upper surface of the strip steel, and the electromagnet on the wear-resistant rubber belt installed on the small-diameter wheel absorbs the oxidized iron scale on the lower surface of the strip steel. (2) When the electromagnet that absorbs the oxidized iron scale rotates to the lower half of the circle along with the wear-resistant rubber belt, the electromagnet is de-energized and demagnetized because it is not in contact with the brush, and the oxidized iron scale automatically falls to the bottom collection device. The oxidized iron scale on the wear-resistant rubber belt installed on the large diameter wheel is scraped off to the bottom collection device by two scrapers; (3) Finally, the iron oxide scale is recovered by a collection device.

[0010] In the present invention, the rotation speed of the rubber wheel matches the running speed of the strip steel, which is adjusted by changing the rotation speed of the motor.

[0011] In the present invention, the magnetic strength of the electromagnet is adjusted by changing the current in the brush.

[0012] In the present invention, in step (3), the recovery of the iron oxide scale is performed by sucking the iron oxide scale in the collecting device into a container outside the factory building through an external suction device.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The device can absorb the iron oxide scale on the upper and lower surfaces of the strip at the same time, avoiding indentation during the strip straightening process and improving the surface quality of the steel; 2. No need for purge device, no dust, safe and environmentally friendly; 3. Iron oxide scale can be continuously adsorbed and collected to improve cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the chain-type electromagnetic adsorption device for oxidized iron scale of the present invention.

[0015] Figure 2 It is a top view schematic diagram of the chain-type electromagnetic adsorption device for oxidized iron scale of the present invention.

[0016] Figure 3 It is a schematic diagram of the application of the present invention in a tensioning and straightening machine. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

[0018] The chain type electromagnetic adsorption device for oxidized iron scale of the present invention is as follows Figure 1 and Figure 2 As shown, it includes two electromagnet chains installed on rubber wheels 1 and 9, and the rubber wheels 1 and 9 are driven to rotate by motor 13; the large electromagnet chain is composed of a wear-resistant rubber belt 3, a powered brush 4 and a number of electromagnets 2; the small electromagnet chain is composed of a wear-resistant rubber belt 6, a powered brush 7 and a number of electromagnets 8. The wear-resistant rubber belt 3 and the wear-resistant rubber belt 6 are installed on the rubber wheel 1 and the rubber wheel 9. The rubber wheels 1 and 9 are stepped and consist of two wheels with different diameters, similar to a stepped shaft. The electromagnet 2 and the electromagnet 8 are respectively arranged on the wear-resistant rubber belt 3 and the wear-resistant rubber belt 6; the electromagnets 2 and 8 include a magnetic core and a conductive coil, and the electromagnets 2 and 8 are regarded as a whole here. The power brushes 4 and 7 are respectively arranged on the supporting structures near the two sides of the rubber wheels 1 and 9, and the two ends thereof are respectively arranged near the outer sides of the two rubber wheels 1 and 9. The power brush 4 is about half the length of the entire chain. During the rotation of the rubber wheels 1 and 9, the power brushes 4 and 7 are stationary, and one end face of the electromagnet 2 and 8 can contact the power brush 4 and 7 to conduct electricity, thereby generating magnetism; when the two are not in contact, the electromagnet 2 and 8 are powered off and demagnetized.

[0019] A support structure is arranged near the wear-resistant rubber belt 3 installed on the large diameter wheel, and scrapers 10 and 11 are arranged on the support structure. The scrapers 10 and 11 are not connected to the wear-resistant rubber belt 3 and are used to scrape off the iron oxide scale adsorbed on the large chain to collect the iron oxide scale.

[0020] Further, the method of using the chain type electromagnetic adsorption oxidized iron scale device is as follows: (1) When the rubber wheel rotates, the electromagnets 2 and 8 on the wear-resistant rubber belts 3 and 6 come into contact with the energized brushes 4 and 7 to generate electromagnetic force, which absorbs the oxidized iron scale on the surface of the strip steel. The electromagnet 2 on the wear-resistant rubber belt 3 installed on the large-diameter wheel absorbs the oxidized iron scale on the upper surface of the strip steel, and the electromagnet 8 on the wear-resistant rubber belt 6 installed on the small-diameter wheel absorbs the oxidized iron scale on the lower surface of the strip steel. (2) When the electromagnets 2 and 8 that absorb the oxidized iron scale rotate to the lower half of the circle along with the wear-resistant rubber belt, the electromagnets 2 and 8 are de-energized and demagnetized because they are no longer in contact with the energized brushes 4 and 7, and the oxidized iron scale automatically falls to the bottom collection device, and the oxidized iron scale on the wear-resistant rubber belt 3 installed on the large-diameter wheel is scraped off to the bottom collection device by two scrapers; (3) Finally, the iron oxide scale is recovered by a collection device.

[0021] As mentioned above, the electromagnetic chain rotates with the rubber wheels 1 and 9, and its rotation speed needs to match the running speed of the strip steel, which can be adjusted by changing the motor speed. The strength of the magnetism of the electromagnet can be adjusted by changing the current in the brush.

[0022] like Figure 3 As shown, the chain electromagnetic adsorption scale oxide device (hereinafter referred to as the chain device) of the present invention is applied to the drawing and leveling machine on the strip pickling and cold rolling line. The strip 5 passes through the chain device 14, the drawing and leveling machine 1# unit 15, the chain device 16, the drawing and leveling machine 2# unit 17, the chain device 18, the drawing and leveling machine 3# unit 19, and the chain device 20 in sequence. The scale oxide on the surface of the strip is broken and crushed under the drawing and leveling action of the drawing and leveling machine 1# unit, the 2# unit and the 3# unit. The scale oxide is adsorbed by the chain devices 14, 16, 18 and 20 and falls into the collecting device 12. Therefore, after the strip passes through the drawing and leveling machine, the scale oxide scattered on the surface is cleaned up, and the probability of pit defects on the surface of the strip is 6.7%. After the chain device is put into use, the pit defect rate is reduced to 0.06%, and the surface quality is greatly improved.

Claims

1. A chain type electromagnetic adsorption device for oxidized iron scale, characterized in that: It includes two rubber wheels, which are stepped and include two wheels with different diameters: a large diameter wheel and a small diameter wheel. A wear-resistant rubber belt is installed on each of the two rubber wheels, and an electromagnet is installed on the wear-resistant rubber belt. The energized brush is arranged on the supporting structure near the two sides of the rubber wheel, and its two ends are arranged near the outer sides of the two rubber wheels respectively.

2. The chain-type electromagnetic adsorption device for oxidized iron scale according to claim 1 is characterized in that: The rubber wheel is connected to the motor, and the motor drives the rubber wheel to rotate.

3. The chain type electromagnetic adsorption device for oxidized iron scale according to claim 1 is characterized in that: A scraper is arranged near the lower wear-resistant rubber belt installed on the large-diameter wheel, and the scraper is arranged on a supporting structure near the lower wear-resistant rubber belt.

4. A method for using the chain-type electromagnetic adsorption oxidized iron scale device according to any one of claims 1 to 3, characterized in that: The steps include: (1) When the rubber wheel rotates, the electromagnet on the wear-resistant rubber belt contacts the energized brush to generate electromagnetic force, which absorbs the oxidized iron scale on the surface of the strip steel. The electromagnet on the wear-resistant rubber belt installed on the large-diameter wheel absorbs the oxidized iron scale on the upper surface of the strip steel, and the electromagnet on the wear-resistant rubber belt installed on the small-diameter wheel absorbs the oxidized iron scale on the lower surface of the strip steel. (2) When the electromagnet that absorbs the oxidized iron scale rotates to the lower half of the circle along with the wear-resistant rubber belt, the electromagnet is de-energized and demagnetized because it is not in contact with the brush, and the oxidized iron scale automatically falls to the bottom collection device. The oxidized iron scale on the wear-resistant rubber belt installed on the large diameter wheel is scraped off to the bottom collection device by two scrapers; (3) Finally, the iron oxide scale is recovered by a collection device.

5. The method for using the chain-type electromagnetic adsorption device for oxidized iron scale according to claim 4, characterized in that: The speed at which the rubber wheel rotates matches the running speed of the strip, which is adjusted by changing the motor speed.

6. The method for using the chain-type electromagnetic adsorption device for oxidized iron scale according to claim 4, characterized in that: The magnetic strength of the electromagnet is adjusted by changing the current in the brush.

7. The method for using the chain-type electromagnetic adsorption device for oxidized iron scale according to claim 4, characterized in that: In step (3), the recovery of the iron oxide scale is performed by sucking the iron oxide scale in the collecting device into a container outside the factory through an external suction device.

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