BS 6356-1-1997 Spraying equipment for crop protection Method of test for sprayer nozzles《农作物防护用喷雾设备 喷嘴试验方法》.pdf

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1、BRITISH STANDARD BS 6356-1: 1997 ISO 5682-1: 1996 Spraying equipment for crop protection Part 1: Method of test for sprayer nozzles ICS 65.060.40BS6356-1:1997 This British Standard, having been prepared underthe directionof the Engineering SectorBoard, was published underthe authority of the Standar

2、ds Board and comes intoeffect on 15May1997 BSI 09-1999 ISBN 0 580 27520 5 National foreword This British Standard reproduces verbatim ISO5682-1:1996 and implements it as the UK national standard. It supersedes BS6356-1:1983 which is withdrawn. The UK participation in its preparation was entrusted to

3、 Technical Committee AGE/15, Equipment for crop protection, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor rel

4、ated international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document ma

5、y be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Sta

6、ndards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, pages ii to iv, pages 1 to 14 and abac

7、kcover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS6356-1:1997 BSI 09-1999 i Contents Page National foreword Inside

8、front cover Foreword iii Text of ISO 5682-1 1ii blankBS6356-1:1997 ii BSI 09-1999 Contents Page Foreword iii 1 Scope 1 2 Normative reference 1 3 Definitions 1 4 Test liquids 1 5 Apparatus 1 6 General test conditions 3 7 Determination of the characteristics of the sprayer nozzles 3 8 Test report 8 An

9、nex A (normative) Specification of the aluminium oxide 9 Annex B (informative) Model test report for hydraulic energy nozzles inaccordancewith ISO 5682-1:1996 10 Figure 1 Example of a distribution bench 2 Figure 2 Groove characteristics 3 Figure 3 Configuration for testing cone nozzles 5 Figure 4 Di

10、agram of the principle of measuring spray angle 7 Descriptors: Agricultural equipment, crop protection, crops treatement equipment, agricultural sprayers, nozzles, sprayer nozzles, tests, performance tests, test equipment.BS6356-1:1997 BSI 09-1999 iii Foreword ISO (the International Organization for

11、 Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the

12、right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft Inte

13、rnational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an InternationalStandard requires approval by at least75% of the member bodies casting a vote. International Standard ISO5682-1 was prepared by Technical Committee ISO/TC 23, Tracto

14、rs and machinery for agriculture and forestry, Subcommittee SC6, Equipment for crop protection. This second edition cancels and replaces the first edition (ISO5682-1:1981), which has been technically revised. ISO5682 consists of the following parts, under the general title Equipment for crop protect

15、ion Spraying equipment: Part 1: Test methods for sprayer nozzles; Part 2: Test methods for hydraulic sprayers; Part 3: Test method for volume/hectare adjustment systems of agricultural hydraulic pressure sprayers. Annex A forms an integral part of this part of ISO5682. Annex B is for information onl

16、y.iv blankBS6356-1:1997 BSI 09-1999 1 1 Scope This part of ISO5682 specifies methods for estimating the accuracy of hydraulic sprayer nozzles for hydraulic spraying. It applies only to hydraulic energy nozzles of mounted, towed and self-propelled agricultural sprayers used for crop protection and fe

17、rtilization. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this part of ISO5682. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on t

18、his part of ISO 5682 are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 5681:1992, Equipment for crop protection Vocabulary. 3 Definitions For the

19、 purposes of this part of ISO5682, the definitions given in ISO5681 apply. 4 Test liquids 4.1 Clean water, free from solids in suspension. 4.2 Clean water with20g/l of micro grains of aluminium oxide (according toAnnex A), renewed after50 passages. 4.3 Clean water with the addition, if necessary, of

20、 a soluble colouring agent, such as dark coloured aniline dye or a similar product. The surface tension of the mixture shall be(35 5)mN/m at20 C and the agent and concentration necessary for achieving this shall be stated in the test report. 5 Apparatus 5.1 Equipment 5.1.1 Pressure gauge, with an ac

21、curacy of 1% at the effective working pressure. 5.1.2 Rubber or plastics hose for each nozzle. 5.1.3 Collecting vessel for each nozzle. 5.1.4 Measuring tube with dimensions compatible with the requirements of7.1.3, or balance, for measuring the quantity of liquid collected. 5.1.5 Watch, with an accu

22、racy of 0,5s. 5.1.6 Scale, with an accuracy of 1mm. 5.1.7 Angle meter, with an accuracy of 0,5 . 5.1.8 Device enabling the nozzles to be moved at a given speed. 5.1.9 Petri dishes, of diameter50mm. 5.1.10 Microscope, with a measuring accuracy of104m. 5.1.11 Photographic device with electronic flash.

23、 5.1.12 Liquid or solid suitable for collecting the drops. 5.2 Distribution bench, equipped with a device allowing collection of the liquid when the test pressure is stabilized and the sprayer nozzles are supplied normally (seeFigure 1 for an example). Components of the bench shall conform to the re

24、quirements given in5.2.1 and5.2.2. 5.2.1 Groove characteristics The walls of the grooves shall be vertical. The upper edges of the walls shall form a plane with, in the longitudinal direction (perpendicular to the grooves), a tolerance of1%(10mm/1m) on the horizontal and, in the lateral direction (p

25、arallel with the grooves), a tolerance of2% (seeFigure 2). The maximum thickness of the groove walls shall be4mm.BS6356-1:1997 2 BSI 09-1999 The distance between two consecutive ridges shall be(50 0,5)mm. The minimum height of the vertical walls of the grooves shall be at least equal to twice the wi

26、dth of the grooves. In the case of a distribution bench composed of grooves spaced at25mm intervals, these conditions apply by comparing two adjacent grooves with one50mm groove. The total width of the distribution bench shall not be affected by the sum of the tolerances permitted for the upper part

27、 of each ridge. Figure 1 Example of a distribution benchBS6356-1:1997 BSI 09-1999 3 5.2.2 Upper part of the walls The upper part of the walls is formed by a symmetrical chamfered edge with may be rounded off and shall have the following characteristics: a) the height of the chamfered edge shall be a

28、t least equal to three times the thickness of the wall; b) the thickness of the chamfered edge at its upper part shall be not greater than1mm; c) the rounding-off radius shall be not greater than0,5mm; d) no point of the ridges shall be more than2mm above or below the mean plane of the ridges. 6 Gen

29、eral test conditions All the operational data and test parameters shall be stated in the test report, of which an example is given inAnnex B. 6.1 Temperature and relative humidity The temperature of the test liquid and the air temperature of the test premises shall be between10 C and25 C during the

30、test. The relative humidity of the test premises shall be normally not less than50%. The temperature and the relative humidity shall be stated in the test report. 6.2 Pressures During the test period, the pressure shall not vary by more than 2,5% of the test pressure. The test pressures shall be sta

31、ted in the test report. The pressure shall be taken downstream of the anti-drip device, the measurement being taken without the nozzle filter. 7 Determination of the characteristics of the sprayer nozzles For each test, the general test conditions shall be in conformity with those specified in claus

32、e6. 7.1 Uniformity of discharge rate of the nozzles 7.1.1 Sampling Take20 complete nozzles of the same type at random. State the sampling conditions in the test report and note, in particular, the size of the stock, the place of sampling, etc. In addition, state in the test report the complete desig

33、nation of the nozzles, including the discs and tips for the cone spray nozzles. The sample shall be taken by a person authorised by the test centre. This person shall also take a second sample, in the same conditions, which will be kept in the test centre in case of control. The two samples shall be

34、 taken out of a lot of at least200 nozzles. 7.1.2 Test liquid Use the test liquid described in4.1. Figure 2 Groove characteristicsBS6356-1:1997 4 BSI 09-1999 7.1.3 Measurements Measure, for each complete nozzle, the volume discharged at the test pressure of0,3MPa(3 bar) with an error of less than1%.

35、 The measuring time, measured with a watch(5.1.5) and with an error of less than1s, shall be greater than or equal to60s. 7.1.4 Results The results shall be presented in the test report in the form of a graph or table in which the discharge rate of each nozzle is expressed as a percentage of the mea

36、n discharge rate of20 complete nozzles. 7.2 Variations in discharge rate according to pressure Perform this test with a nozzle for which the discharge rate is closest to the mean value determined in7.1. 7.2.1 Test liquid Use the test liquid described in4.1. 7.2.2 Pressure Perform the tests at the ma

37、ximum and minimum pressures indicated by the manufacturer and at least two intermediate pressures. The differences between two consecutive pressures shall be less than or equal to0,5MPa(5bar). 7.2.3 Measurements Measure the discharge rate, in litres per minute, at each of the pressures indicated in7

38、.2.2, with an error of less than1%. The measuring time, measured with a watch(5.1.5) and with an error of less than1s, shall be greater than or equal to60s. 7.2.4 Results The results shall be presented in the test report in the form of either a graph in which the discharge rate is indicated on the y

39、-axis and the pressure on the x-axis, or a table. 7.3 Distribution of the spray Perform this test with a nozzle for which the discharge rate is closest to the mean value determined in7.1. 7.3.1 Test liquid Use the test liquid described in4.1. 7.3.2 Pressure Perform the test at the maximum and minimu

40、m pressures stated by the manufacturer and at least two intermediate pressures. 7.3.3 Position of the nozzle During the test, the nozzle shall be positioned vertically above a ridge of the distribution bench and in its normal working attitude in order to direct its spray onto the bench. If the manuf

41、acturer indicated one particular position, the test shall be made in this position. If the manufacturer states an optimum height for use, carry out the test at the height stated and150mm above and below this height. If the manufacturer does not indicate any heights, carry out the tests at the follow

42、ing heights:400mm,500mm,600mm,700mm and, if necessary, at300mm and800mm. The height shall be measured between the edge of the ridge and the orifice of the nozzle. Flat spray nozzles shall be positioned for the test so that the longest dimension of the spray pattern is perpendicular to the grooves. C

43、one nozzles shall be tested in the following configurations (seeFigure 3): a) in their initial configuration; b) in a second configuration resulting from a 90 rotation of the nozzle disc or nut in its assembly; c) when the spiral can turn in relation to the disc with the nozzle reassembled with the

44、swirl plate turned through90 in relation to configurationb).BS6356-1:1997 BSI 09-1999 5 7.3.4 Measurements Stop the test as soon as the amount of liquid collected in one of the tubes has reached90% of its capacity. Record the quantities collected in each tube. 7.3.5 Results Represent the distributio

45、n of the spray by a graph or a table indicating the values as percentages of the mean quantity of liquid collected in all the grooves. 7.4 Variations in flow rate and spray distribution due to abrasion (accelerated wear test) This test does not prejudge the life of the nozzle in the actual condition

46、s of use, but is used to compare the resistance of the nozzles to wear and the resulting deterioration in their distribution. It shall be carried out on five nozzles, for which the discharge rate is closest to the mean value determined in7.1. 7.4.1 Test liquid Use the test liquid described in4.2. Th

47、e temperature of the liquid shall be(20 3) C throughout the test. Ensure that the abrasive material is always well dispersed throughout the liquid (for example, by means of a controlled escape of compressed air with a pressure such that after5min of operation, there is no longer any deposit at the b

48、ottom of the tank). Ascertain, if need be by a preliminary test, that the test liquid retains its abrasiveness in relation to the material of the nozzles throughout the duration of the test defined in7.4.3. If it does not, replace the abrasive liquid as often as necessary. NOTEA preliminary test can

49、 be carried out using identical metering orifices from the same batch and manufactured from a suitable material for the nozzles being tested, measuring the increase in discharge rate after passing through a given volume of the test liquid at the specified pressure. 7.4.2 Test pressure The test pressure, p t , shall be chosen as follows, according to the maximum pressure, p s , recommended by the supplier: a) 0,05 MPa p s u 0,3 MPa: p t= 0,1 MPa b) 0,3 MPa p s u 0,5 MPa: p t= 0,3 MPa c) 0,5 MPa p s u 1 MPa: p t= 0,5 MPa For nozzle