Emulsion spraying device for cold rolling unit and spraying pipeline design method of emulsion spraying device
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A spray device and pipeline design technology, which is applied in workpiece lubrication devices, metal rolling, metal rolling, etc., can solve the waste of emulsion at the edge, defects in the shape and surface quality of secondary cold-rolled products, and cannot be precisely controlled Strip steel and other problems to achieve the effect of improving the lubrication performance
Active Publication Date: 2020-04-03
BAOSHAN IRON & STEEL CO LTD
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[0011] The object of the present invention is to provide a kind of emulsion spray device and its spray pipe design method, the present invention can flexibly adjust the diameter of the spray pipe, the distance between the nozzles, and the spray direction angle, so that the strip in the secondary cold rolling mill When the width range changes, the distribution of the emulsion flow on the strip surface is pre
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[0061] Example 1:
[0062] (1) Pipeline length selection, such as Figure 5 As shown, the specific process of pipeline length selection is as follows:
[0063] (a) Collect and calculate the required rolling lubrication process parameters, including: collect the equipment process parameters required for the design of spliced spray racks, including: nozzle spray height H = 150mm, nozzle spray direction angle α = 68°, nozzle spray angle θ = 50°.
[0064] (b) The maximum value S of the nozzle superposition area length max =50mm and minimum value S min =30mm, given the initial value of pipeline length L 0 =90mm and optimized step size ΔL=2mm. given l 1 = 10mm, l 2 = 40mm.
[0065] (c) Define the pipeline length search parameter i, and initialize i=1, the result record process parameter k, and initialize k=1, define the pipeline length L that meets the rolling lubrication requirements i , and its group number N, and initialize N=0.
[0066] (d) Calculate the spray width ...
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[0087] Example 2:
[0088] (1) Pipeline length selection, such as Figure 5 :
[0089](a) Collect and calculate the required rolling lubrication process parameters, including: collect the equipment process parameters required for the design of spliced spray racks, including: nozzle spray height H = 200mm, nozzle spray direction angle α = 72°, nozzle spray angle θ = 58°.
[0090] (b) The maximum value S of the nozzle superposition area length max = 60mm and minimum S min =30mm, given the initial value of pipeline length L 0 = 150mm and optimized step size ΔL = 5mm. given l 1 = 15mm, l 2 = 60mm.
[0091] (c) Define the pipeline length search parameter i and initialize i=1, the result record process parameter k and initialize k=1, define the parameter L that satisfies the requirement of the length of the superposition area i and its group number N and initialize N=0.
[0092] (d) Calculate the spray width of a single nozzle:
[0093] (e) Calculate the pipeline leng...
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Abstract
The invention relates to an emulsion spraying device for a cold rolling unit and a spraying pipeline design method of the emulsion spraying device. The emulsion spraying device comprises a plurality of spraying units; each spraying unit comprises a three-way valve, a spraying pipeline and a nozzle device; the inlet of the three-way valve is an emulsion inlet; the first outlet of the three-way valve is communicated with the spraying pipeline; and the second outlet of the three-way valve is communicated with the nozzle device. Every two adjacent spraying units are communicated through the corresponding spraying pipeline. According to the emulsion spraying device for the cold rolling unit and the spraying pipeline design method of the emulsion spraying device of the invention, the pipe diameters of the spraying pipelines, nozzle spacing and injection direction angles can be flexibly adjusted, so that the flow distribution of emulsion on the surface of the strip steel of a secondary cold rolling unit can be accurately controlled when the width range of the strip steel of the secondary cold rolling unit is changed. According to an existing emulsion spraying rack, the distribution of theemulsion flow on the surface of the strip steel cannot be accurately controlled when the width range of the strip steel of the secondary cold rolling unit is changed, and as a result, the plate shapeand surface quality defects of a secondary cold-rolled product are likely to be brought about, and more emulsion is wasted on the edge of a narrow strip steel during the production of the narrow strip steel. However, with the emulsion spraying device and the spraying pipeline design method thereof of the invention adopted, the above problems can be solved.
Description
technical field [0001] The invention relates to the technical field of cold-rolled strip steel, in particular to an emulsion spraying device and a spraying pipeline design method for a cold-rolling unit. Background technique [0002] For the production of cold-rolled sheet and strip steel, in order to ensure the stability of the rolling process, improve the shape and surface quality of cold-rolled sheet and strip steel products, and increase the service life of the rolls, emulsion is generally used for rolling process lubrication. The conventional cold-rolled strip steel emulsion spraying system includes an emulsion circulation system and an emulsion direct injection system. The emulsion circulation system sprays a large amount of emulsion on the roll gap for lubrication and recycles the emulsion. The emulsion direct injection system sprays a small amount of emulsion on the surface of the steel strip at a certain position away from the roll gap. Before the emulsion enters t...
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