Uniform cross distribution of double flat spray nozzles may be affected by the design of the sprayer

Transcription

1 Uniform cross distribution of double flat spray nozzles may be affected by the design of the sprayer 4 th European workshop on Standardized Procedure for the inspection of Sprayers in Europe Spise 4 R. Heinkel, E. Herbst

2 Uniform cross distribution of double flat spray nozzles may be affected by the design of the sprayer Outline Introduction Problematic areas Approval Measurements and results Scanner patternator Conclusion

3 Introduction Directive According to EU Directive 2009/128/EC pesticide equipment must function reliably and be used properly for its intended purpose ensuring that pesticides can be accurately dosed and distributed. Problem Double flat fan air induction nozzles are popular and in the meantime well accepted by farmers. Their main characteristic is based on a second spray level with mainly symmetric set up. DF IDKT TwinSpray Cap

4 Introduction EN Inspection of sprayers in use Part Regardless of the distance of the boom above the ground, no liquid shall be sprayed on the sprayer itself.

5 Problematic areas Kind of mounting of the boom on a tower compared to a parallelogram With low and mid boom height it s ok!

6 Problematic areas Sprayer frame of mounted sprayer Holder AS-4, 10 m boom equipped with IDKT C

7 Problematic areas Sprayer frame of mounted sprayer Holder AS-4, 10 m boom equipped with IDKT C

8 Problematic areas Sprayer frame of mounted sprayer Holder AS-4, 10 m boom equipped with IDKT C

9 Problematic areas Tyres of trailed sprayer Schmotzer sprayer, boom equipped with IDKT C

10 Problematic areas Tyres of trailed sprayer Schmotzer sprayer, boom equipped with IDKT C

11 Problematic areas Standard EN Part Regardless of the distance of the boom above the ground, no liquid shall be sprayed on to the sprayer itself. This does not apply if needed by function and if dripping is minimised Source: JKI

12 Approval EN Inspection of sprayers in use Part All nozzles shall be identical (type, size, material and origin) all along the boom, except where they are intended for a special function for example the end nozzles for border spraying. JKI approval (20 th of March 2012) Boom same pressure setting same drift reduction (Germany) Boom middle section G 1932 IDKT POM 6 x IDKN POM G 1933 IDKT POM 6 x IDKN POM G 1934 IDKT POM 6 x IDK POM

13 Approval Advantages Mixed mounting in the middle section: no negative effect on cross distribution easy to do cheap

14 Cross distribution IDKT and IDKN nozzles in the middle section Cross distribution (cv) of new nozzles IDKT C IDKN New nozzles (Lechler patternator) CV % 2,0 bar 4,0 bar Spray height IDKT IDKN IDKT IDKN 500 mm 2,1 2,7 1,7 3,0

15 Cross distribution IDKT and IDKN nozzles in the middle section Holder ES-4, 12m boom (nozzles in use) Boom: IDKT C, 3,0 bar cv 8,86%

16 Cross distribution IDKT and IDKN nozzles in the middle section IDKN in the middle segment of the boom

17 Cross distribution IDKT and IDKN nozzles in the middle section Holder ES-4, 12m boom (nozzles in use) Lateral boom: IDKT C, 3,0 bar Middle segment of the boom: 4 x IDKN , 3,0 bar Improved cross distribtuion cv 2,6% better cv 6,26%

18 Measurement of cross distribution with Scanner Actual situation Most scanner patternators in use are 1,50 m in depth At 0,5m spray height opening in-between the spray jets is around 0,6 m Exact reverse to bring boom into parallel position along the track is necessary

19 Measurement of cross distribution with Scanner New scanner patternator with 2,00 m in depth Upgrade on current Herbst model of 1,50 m patternator Modification takes 2 min Handling with big booms is much easier Spray of both jets is catched easily

20 Uniform cross distribution of double flat spray nozzles may be affected by the design of the sprayer Summary According to EU Directive 2009/128/EC and EN no liquid shall be sprayed on the sprayer itself. Double flat fan nozzles may splash on sprayer frame Mixed mounting of IDKT and IDK / IDKN is favourable when technical modifications on the sprayer are not possible or causes high expenses easy to do cheap no negative effect on cross distribution Herbst scanner patternator with 2m depth is available for refitting in order to catch complete spray jets of double flat fan nozzles Standards in revision, such as ISO and 16122, are amended with respect to enable mixed mounting of nozzles in special situations

21 Uniform cross distribution of double flat spray nozzles may be affected by the design of the sprayer Thank you very much for your attention 4 th European workshop on Standardized Procedure for the inspection of Sprayers in Europe Spise 4 R. Heinkel, E. Herbst