Dustproof system of positive pressure type laser nicking equipment

Abstract

The utility model provides a dustproof system of positive pressure type laser nicking equipment. The dustproof system comprises an external air supply system of a laser nicking equipment cavity and an internal air supply system of the laser nicking equipment cavity, an external air supply system of a laser nicking equipment cavity comprises a compressed air main pipe network access point, a first-stage coarse filter and a third-stage fine filter, the first-stage coarse filter adopts a large-flow automatic drainage type air filter and is arranged behind a main pipe network access point valve, and the third-stage fine filter adopts a triple precision filter and is arranged in front of the laser nicking equipment cavity. Hand valves are arranged in front of the first-stage coarse filter and the third-stage fine filter, and all the parts are connected through stainless steel pipelines. Compressed air subjected to four-stage filtration and purification is uniformly introduced into a cavity of the laser nicking equipment through a spray pipe, so that positive pressure of 20 pa is formed in the cavity, dust generated by laser nicking on strip steel and oxide scale falling off from an adjusting material are prevented from entering the laser nicking cavity, and therefore, the laser nicking equipment can normally, continuously and stably run, and the service life of the laser nicking equipment is prolonged. And the maintenance cost of the equipment is saved, and meanwhile, great economic benefits are created.

Description

Technical Field

[0001] The invention belongs to the technical field of dust prevention for precision equipment, and relates to dust prevention for laser scoring equipment, in particular to a positive pressure type dust prevention system for laser scoring equipment. Background Art

[0002] The main function of the FCL unit of the Silicon Steel Division is to clean the residual magnesium oxide powder on the surface of the steel strip, apply a stress coating after pickling and surface activation, and then obtain a stable performance oriented silicon steel product through hot stretching and laser scoring in an annealing furnace.

[0003] In this FCL unit, the laser scoring equipment plays a vital role in improving product performance and efficiency. During the operation of the equipment, the laser scoring on the steel strip will produce coating dust. At the same time, the surface of the adjustment material used in the process transition has a large amount of oxides and coating dust that are very easy to fall off. The dust and oxides generated under the two working conditions will enter the laser scoring cavity through the laser beam outlet of the laser scoring equipment on the upper part of the strip, and adhere to the key optical path components such as the shaping mirror, reflector, and focusing mirror in the cavity, causing damage to the lens surface. After 2-3 days in the production process, it cannot continue to be used normally, that is, it is necessary to clean the dust pollutants on the lens surface and in the cavity, and each time takes about 1 hour. Utility Model Content

[0004] The purpose of the utility model is to provide a positive pressure laser scoring equipment dust prevention system to prevent the dust generated by laser scoring on the strip steel and the oxide and coating dust shed by the adjustment material from entering the cavity of the laser scoring equipment, thereby ensuring that key optical path components are not contaminated.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0006] A positive pressure laser scoring equipment dust prevention system, comprising an air supply system outside the laser scoring equipment cavity and an air supply system inside the laser scoring equipment cavity;

[0007] The laser scoring equipment cavity external air supply system includes a compressed air main network access point, a primary coarse filter and a third-stage fine filter. The primary coarse filter adopts a large-flow automatic drainage air filter and is arranged behind the main network access point valve. The third-stage fine filter adopts a triple precision filter and is arranged in front of the laser scoring equipment cavity. Hand valves are arranged in front of the primary coarse filter and the third-stage fine filter, and each component is connected by a stainless steel pipe.

[0008] The air supply system inside the cavity of the laser scoring equipment includes a compressed air blowing device and a cavity pressure detection device inside the laser scoring equipment; the compressed air blowing device is made of PPR material, and a plurality of spray holes are evenly arranged along the effective length of the nozzle, and the spray direction of the spray holes is upward. A joint is provided on the inner wall of the cavity to connect to the micro-pressure gauge outside the cavity, and the pressure inside the cavity is controlled by adjusting the manual valve outside the cavity.

[0009] The beneficial effects of the utility model are:

[0010] This dust prevention system can prevent the dust generated by laser scoring on the strip and the oxides and dust shed by the adjustment material from entering the laser scoring cavity through the laser beam outlet of the laser scoring equipment on the upper part of the strip for a long time. The key optical path components such as the shaping mirror, reflecting mirror, focusing mirror, etc. in the cavity will not be easily contaminated, ensuring the efficient application of the laser scoring equipment and saving the spare parts cost of the key optical path components. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] In the figure, 1. access point of compressed air main network; 2. primary coarse filter; 3. tertiary fine filter; 4. cavity of laser scoring equipment; 5. manual valve 1; 6. manual valve 2; 7. nozzle; 8. nozzle hole; 9. micro pressure gauge; 10. laser pipe partition; 11. laser scanning box. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with the embodiments and drawings: Example

[0014] The laser scoring equipment of the 2# FCL unit of the Silicon Steel Division has successfully used this positive pressure laser scoring equipment dust prevention system, such as Figure 1 As shown, it includes an air supply system outside the laser scoring equipment cavity and an air supply system inside the laser scoring cavity;

[0015] The laser scoring equipment cavity external air supply system includes a compressed air main network access point 1, a primary coarse filter 2 and a third-level fine filter 3. The primary coarse filter 2 adopts a large-flow automatic drainage air filter with a filtration accuracy of 5μm and is arranged 1 meter behind the main network access point 1 valve. The third-level fine filter 3 adopts a triple precision filter with filtration accuracies of 3μm, 1μm and 0.01μm respectively, and an airflow processing capacity of 3.5m³ / min. The third-level fine filter 3 is arranged 1.5m in front of the laser scoring cavity 4. A hand valve 1 5 is arranged in front of the primary coarse filter 2, and a hand valve 2 6 is arranged in front of the third-level fine filter 3, which is convenient for system gas supply and filter maintenance and replacement. DN25 stainless steel pipes are used to connect the components, and the system pressure is 0.4-0.6Mpa.

[0016] The air supply system in the laser scoring equipment cavity includes a compressed air blowing device and a laser scoring cavity pressure detection device, which are used to pass the purified compressed air into the laser scoring cavity 4 to form a positive pressure, ensuring that the dust generated by the laser scoring on the strip and the oxides and dust shed by the adjustment material cannot enter the laser scoring equipment cavity 4; the compressed air blowing device includes a nozzle 7 made of PPR material, which is arranged in the laser scanning box 11 above the laser pipe partition 10. The nozzle 7 has 13 nozzle holes 8 with an aperture of 10 mm evenly arranged along the effective length of 1260 mm. The nozzle hole 8 is sprayed in an upward direction, and the airflow is reflected by the top of the laser scoring cavity. And then fill the whole cavity, thus avoiding the formation of vortex and cyclone of compressed air at the laser beam outlet of the laser scoring equipment just below the nozzle, effectively preventing pollutants from entering from there; the inner wall of the cavity is provided with a joint connected to the micro-pressure gauge 9 outside the cavity. When in use, the pressure in the laser scoring cavity 4 is adjusted to 20pa by adjusting the hand valve on the pipeline. This pressure is the optimal pressure of the laser scoring cavity 4. It will not cause poor dust prevention effect due to insufficient pressure, nor will it waste compressed air due to high pressure. The compressed air at the laser beam outlet of the laser scoring equipment will generate harmful vortex and cyclone at the laser beam outlet after being reflected by the surface of the strip, causing pollutants to enter the cavity.

Claims

1. A positive pressure laser scoring equipment dust prevention system, characterized in that: It includes an air supply system outside the laser scoring equipment cavity and an air supply system inside the laser scoring equipment cavity. The air supply system outside the laser scoring equipment cavity includes a compressed air main network access point, a primary coarse filter and a third-stage fine filter. The primary coarse filter is arranged behind the valve of the main network access point, and the third-stage fine filter is arranged in front of the laser scoring equipment cavity. Hand valves are arranged in front of the primary coarse filter and the third-stage fine filter, and each component is connected by a stainless steel pipe; the air supply system inside the laser scoring equipment cavity includes a compressed air blowing device and a laser scoring equipment cavity pressure detection device. The compressed air blowing device adopts a PPR material nozzle to evenly arrange a plurality of spray holes along the effective length, and the spraying direction of the spray holes is upward.

2. A positive pressure laser scoring equipment dust prevention system according to claim 1, characterized in that: The primary coarse filter adopts a large-flow automatic drainage type air filter.

3. The dust prevention system for positive pressure laser scoring equipment according to claim 1, characterized in that: The three-stage fine filter adopts a triple precision filter.

4. The dust prevention system for positive pressure laser scoring equipment according to claim 1, characterized in that: The cavity pressure detection device of the laser scoring device is a micro-pressure gauge connected from a joint provided on the inner wall of the cavity to the outside of the cavity, and the pressure in the cavity is controlled by adjusting a manual valve outside the cavity.

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