Patent RU-2056952-C1 (RU)
Inventor: KARPENKO MIKHAIL B
IPC: B05B7/28
Filed: 1993-04-05
Granted: 1996-03-27
Abstract: FIELD: agriculture; spraying of farm crops. SUBSTANCE: liquid for spraying device is supplied with viscosity within 0,87•10 -3 ≅ μ ≅ 1,5 Pa•s and content C of undissolved particles relative to liquid amount C 2  passed through spraying device per time unit within 1 ≅ (C 1 + C 2 )/C 2  ≅ 1,9 and maximum sizes d of undissolved particles within 0 ≅ d ≅ 5 mm at pressure P 1  of liquid supply within 0,02 ≅ P 1 ≅ 150 atm. Ratio between liquid pressure and gas flow pressure is maintained within 1,2 ≅ P 1 /P 2 ≅ 1,5•10 3 . Splitting of liquid is effected by liquid passing through hole with subsequent multistage splitting, including mechanical splitting at the first stage by jet impact against fixed obstacle to form particles with volume V 1  selected with respect to volume V 2  of supplied for splitting per time unit of liquid within 10 -9 ≅ V 1 /V 2 ≅ 1. At the second stage, interaction is effected between produced particles of liquid with n jets of gas flow whose number is selected within 1 ≅ n ≅ 10 9 . In this case, inertial separation of fine particles is effected, and coarse are split by intersection jets of gas flow to form particles with volume V 3  whose relation to volume V 1  is selected within the limits of 10 -9 ≅ V 3 /V 1 ≅ 1. At the last stage of splitting, separation of the largest particles with volume V 4  is carried out with subsequent splitting to volumes V 5  whose relation to volume V 4  is maintained within 10 -6 ≅ V 5 /V 4 ≅ 1. When liquid particles are split by gas flow, they are saturated with gas volume V 6  which are selected with respect to volume V 3  by maintaining the total gas flow rate q g  relative to liquid flow rate q l  within 10 -3 ≅ q g /q l ≅ 10 3 . Device output part of branch pipe 3 supplying liquid is located in liquid chamber 2 and has holes 4 in is side wall. Branch pipe supplying gas flow is made in form of changeable air intake 5 in hollow of body 1. Air intake 5 has end wall 6 facing liquid chamber 3. Air intake 5 has holes 7 and 8 for supply of gas flow in end and side walls ob body hollow. Discharge means for liquid supply to hollow of body 1 is made in form of slotted holes 10 in wall 11 of liquid chamber facing end wall 6 of air intake to form chamber 12 of preliminary splitting in body hollow. Ratio between area S 1  of slotted hole 10 and area S 2  of end wall of air intake 5 is selected within 0,011 ≅ S 1 /S 2 ≅ 1,2•10 3 . Ratio of value S of width of slotted gap and distance l between wall 11 of liquid chamber and end wall of air intake is selected within 1,3•10 -2 ≅ S/l≅ 1,4•10 3 . Formed between external surface of side wall of branch pipe 5 and internal body surface is chamber 13 of main splitting of elongated shape. Holes on side wall of air intake are made with varying and decreasing in spacing in direction of flow motion and minimal size of cross-section and at angle α between perpendicular to output planes of holes and tangents to generating line of air intake wall selected within 10 °  ≅ α ≅ 170 ° . Ratio between area S 3  of inlet hole of main splitting chamber and area S 4  of its outlet hole is taken within 2,1•10 -2 ≅ S 3 /S 4 ≅ 3,2•10 2 . Ratio between volume V 7  of main splitting chamber 13 and volume V 8/   of chamber 12 of preliminary splitting is selected within 5,2•10 -2 ≅ V 7 /V 8 ≅ 4,6•10 2 . Air intake 5 in zone of outlet nozzle 16 has bent off wall 17 with sharp edge 18 forming together with output end of body a zone of separation and final splitting in form of curved channel 20. Angle β of taper of sharp edge is taken within 10 °  ≅ α ≅ 170 ° . Ratio between area S 5  of bent side wall 17 and area S 4  of outlet hole of main splitting chamber is taken within 0,48•10 -2 ≅ S 5 /S 4 ≅ 6,1•10 2 . Ratio between area S 6  of outlet hole of zone of final splitting and variable area of inlet hole 21 of air intake is taken within 0,1 ≅ S 6 /S 7 ≅ 3,1 and relation between summary area S 8  of holes of end wall of air intake and area S 9  of holes of side wall of air intake and area S 7  of inlet hole of air intake is elected within 10 -3 ≅ (S 8 + S 9 )/S 7 ≅ 10. EFFECT: higher efficiency. 2 cl, 2 dwg