阅读说明：本技术 一种玻璃外表面颗粒污染物的激光清洗工艺 (Laser cleaning process for particle pollutants on outer surface of glass ) 是由 汪张煜 戴峰泽 周建忠 于 2019-09-18 设计创作，主要内容包括：本发明涉及表面处理领域,具体涉及一种玻璃外表面颗粒污染物的激光清洗工艺。主要包括脉冲激光束、流动水膜、涂水装置、透镜和沾有颗粒污物的玻璃。涂水装置流出的流动水膜覆盖在沾有颗粒污物的玻璃反面,颗粒污物被流动水膜包裹,脉冲激光经透镜聚焦后从玻璃另一面透过玻璃直接作用于颗粒污物,颗粒污物吸收脉冲激光能量后在流动水膜中引起空化效应,从而产生巨大的冲击爆炸力,当冲击爆炸力大于吸附力时,颗粒污物从表面脱落,脱落颗粒物随着流动的水膜一起流出。本发明可应用于高楼房屋的外墙玻璃清洗。(The invention relates to the field of surface treatment, in particular to a laser cleaning process for particle pollutants on the outer surface of glass. Mainly comprises a pulse laser beam, a flowing water film, a water coating device, a lens and glass stained with particle dirt. Scribble the glass reverse side that the flowing water film that the water installation flows covered being stained with the granule filth, the granule filth is wrapped up by the flowing water film, and pulse laser sees through glass another side behind the lens focus and sees through glass direct action in the granule filth, arouses cavitation effect in the flowing water film behind the granule filth absorption pulse laser energy to produce huge impact explosive force, when impact explosive force is greater than the adsorption affinity, the granule filth drops from the surface, and the particulate matter that drops flows along with the flowing water film together. The invention can be applied to cleaning the glass of the outer wall of a high-rise building.)

1. A laser cleaning process for particle pollutants on the outer surface of glass is characterized in that a flowing water film which flows downwards from a water coating device covers the back surface of the glass which is stained with the particle pollutants, the particle pollutants are wrapped by the flowing water film, pulse laser is focused by a lens and then directly acts on the particle pollutants through the glass from the other surface of the glass, the particle pollutants absorb the energy of the pulse laser and then cause cavitation effect in the flowing water film, so that huge impact explosive force is generated, and when the impact explosive force is greater than adsorption force, the particle pollutants fall off from the surface.

2. The laser cleaning process of claim 1, wherein the pulsed laser beam is applied to a water film, and the particulate contaminants are wetted by the flowing water film.

3. A particulate contamination of an outer surface of glass as described in claim 1The laser cleaning process of the object is characterized in that the range of the pulse width of the pulse laser is 130-150 ns, and the range of the power density is 5.73 multiplied by 106W/cm²～6.69×106W/cm²。

4. The laser cleaning process for particulate contaminants on the outer surface of glass according to claim 1, wherein the flowing water film uniformly flows down along the surface of glass, the flow rate is controlled to be 1cm/s to 10cm/s, and the thickness of the flowing water film is 0.5 mm to 1 mm.

Technical Field

The invention relates to the field of surface treatment, in particular to a laser cleaning process for particle pollutants on the outer surface of glass.

Background

In high-rise buildings, glass curtain walls are used as an excellent decorative material. However, the glass is easy to be adhered with particle pollutants, the cleaning of the particle pollutants is usually completed by manpower, the operation efficiency and the cost are high, and the danger is high. The solvent cleaned in the construction process is easy to remain on the surface of the glass, thereby generating secondary pollution. The laser cleaning is a novel high-efficiency cleaning method, particle pollutants on the surface can be removed, the operation process can be finished indoors, and the labor intensity is greatly reduced.

Disclosure of Invention

The invention aims to provide a process for cleaning particle pollutants on the surface of glass by laser so as to remove the particle pollutants attached to the surface of the glass.

In order to solve the technical problems, the invention adopts the following specific technical scheme:

a process for cleaning particle pollutants on the surface of glass by laser is characterized in that: scribble the glass reverse side that the flowing water film that the device flowed down covered at the granule filth, the granule filth is wrapped up by flowing water film, and pulse laser sees through glass direct action in the granule filth from the glass another side after the lens focus, and the granule filth arouses cavitation effect in flowing water film after absorbing pulse laser energy to produce huge impact explosive force, when impact explosive force is greater than the adsorption affinity, the granule filth drops from the surface.

The pulse laser beam acts on the water film, and the particle dirt is soaked in the flowing water film.

The range of pulse width of the pulse laser is 130-150 ns, and the range of power density is 5.73 multiplied by 10⁶W/cm²～6.69×10⁶W/cm²。

The flowing water film flows down along the surface of the glass uniformly, the flow speed is controlled to be 1-10 cm/s, and the thickness of the flowing water film is 0.5-1 mm.

The working principle of the invention is as follows: the flowing water film that scribbles the water installation and flow out covers at the glass reverse side that is stained with the granule filth, and the granule filth is wrapped up by the flowing water film, and pulse laser sees through glass direct action in granule filth behind the lens focus, and the granule filth arouses cavitation effect in the flowing water film after absorbing pulse laser energy to produce huge impact explosive force, when impact explosive force is greater than the adsorption affinity, the granule filth drops from the surface. The invention is suitable for cleaning the particle dirt on the outer surface of the glass of the high-rise building, and when the pulse width is 130-150 ns, the stripping force of the particles under the action of the laser beam is the largest.

The invention has the following beneficial effects: the invention can be used for cleaning the outer wall glass of a high building, does not need workers to operate outdoors, has high safety and is not influenced by weather; the invention can obtain good cleaning effect by soaking the particle dirt in the flowing water film and generating cavitation effect under the action of laser.

Drawings

FIG. 1 is a schematic view of an apparatus for laser cleaning particulate contaminants from a glass surface;

in the figure: 1 pulse laser beam 2 glass sheet 3 water coating device 4 flowing water film 5 particle dirt 6 lens

Detailed Description

In order to better explain the implementation details of the present invention, the following detailed description of the technical solution of the present invention is made with reference to the accompanying drawings and the specific embodiments

The process for cleaning particle pollutants on the surface of glass by laser comprises a pulse laser beam 1, a glass sheet 2, a water coating device 3, a flowing water film 4, particle pollutants 5 and a lens 6 as shown in figure 1. The flowing water film 4 flows down along the back surface of the glass sheet 2 uniformly, and the particle dirt 5 is in the flowing water film 4.

The first implementation example is as follows:

in this example, the single pulse energy of the pulse laser beam was 0.74mJ, the frequency was 100KHZ, the scanning speed was 800mm/s, and the laser power density was 5.73X 10⁶W/cm²The pulse width of the emitted pulse laser beam 1 was 130ns, and the spot diameter of the pulse laser beam focused to the glass sheet 2 was 20 μm. The thickness of the flowing water film 4 is 0.5-1 mm, and the flowing speed is 1-10 cm/s. The particle dirt 5 is dust with the size of 1-200 mu m.

The efficiency of laser cleaning is 1.8m²The density of the particle dirt on the surface of the glass 2 before laser cleaning is 265 particles/mm²After laser cleaning, the density of the particulate contamination on the surface of the glass sheet 2 was 3.5 particles/mm²。

Example two

In this example, the single pulse energy of the pulse laser beam was 0.89mJ, the frequency was 150KHZ, the scanning speed was 1000mm/s, and the laser power density was 6.36X 10⁶W/cm²The pulse width of the emitted pulse laser beam 1 was 140ns, and the spot diameter of the pulse laser beam focused to the glass sheet 2 was 20 μm. The thickness of the flowing water film 4 is 05-1 mm, and the flow speed is 1-10 cm/s. The particle dirt 5 is dust with the size of 1-200 mu m.

The efficiency of laser cleaning is 3m²The density of the particle dirt on the surface of the glass 2 before laser cleaning is 285 particles/mm through detection²After laser cleaning, the density of the particulate contamination on the surface of the glass sheet 2 was 4.5 particles/mm²。

Example III

In this example, the single pulse energy of the pulse laser beam was 1mJ, the frequency was 100KHZ, the scanning speed was 1000mm/s, and the power density was 6.69X 10⁶W/cm²The pulse width of the emitted pulse laser beam 1 was 150ns, and the spot diameter of the pulse laser beam focused to the glass sheet 2 was 20 μm. The thickness of the flowing water film 4 is 0.5-1 mm, and the flowing speed is 1-10 cm/s. The particle dirt 5 is dust with the size of 1-200 mu m.

The efficiency of laser cleaning is 5m²H, the density of the particle dirt on the surface of the glass 2 before laser cleaning is 398 particles/mm through detection²After laser cleaning, the density of the particulate contamination on the surface of the glass sheet 2 was 10.3 particles/mm²。