1、 Reference number ISO 8026:2009(E) ISO 2009INTERNATIONAL STANDARD ISO 8026 Third edition 2009-12-15 Agricultural irrigation equipment Sprayers General requirements and test methods Matriel agricole dirrigation Diffuseurs Exigences gnrales et mthodes dessai ISO 8026:2009(E) PDF disclaimer This PDF fi
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6、country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedISO 8026:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv 1 S
7、cope1 2 Normative references1 3 Terms and definitions .1 4 Classification .3 4.1 Classification according to uniformity of coverage 3 4.2 Classification according to water-spray characteristic(s) 3 4.3 Classification according to performance characteristics (flow rate regulation) 4 4.4 Classificatio
8、n according to type of connection .4 4.5 Classification according to additional functions .4 5 General requirements .4 5.1 Materials .4 5.2 Manufacture and assembly 4 5.3 Connections.4 6 Test methods .5 6.1 Measurements .5 6.2 General test conditions.5 6.3 Hydraulic tests.6 6.4 Durability test.16 6.
9、5 Mechanical test16 7 Identification and marking17 8 Data to be supplied by the manufacturer17 ISO 8026:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of pre
10、paring 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 right to be represented on that committee. International organizations, governmental and non-governmental, in
11、 liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task
12、 of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention
13、 is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 8026 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, S
14、ubcommittee SC 18, Irrigation and drainage equipment and systems. This third edition cancels and replaces the second edition (ISO 8026:1995), which has been technically revised. It also incorporates the Amendment ISO 8026:1995/Amd.1:2000. INTERNATIONAL STANDARD ISO 8026:2009(E) ISO 2009 All rights r
15、eserved 1Agricultural irrigation equipment Sprayers General requirements and test methods 1 Scope This International Standard specifies the general requirements and test methods for irrigation sprayers. It is applicable to sprayers intended for installation on a pipe lateral and for operation with i
16、rrigation water. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7-1,
17、Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 15886-3:2004, Agricultural irrigation equipment Sprinklers Part 3: Characterization of distribution and test methods 3 Terms and definitions For the purposes of this document, the foll
18、owing terms and definitions apply. 3.1 ambient temperature temperature of the air surrounding a sprayer 3.2 collector receptacle into which water is deposited during a water distribution test, a diameter of coverage test or a spray coverage pattern 3.3 diameter of coverage distance between the most
19、remote points at which a continuously operating sprayer deposits water at an effective application rate, measured along a straight line through the sprayer, equal numerically to twice the radius of throw 3.4 effective application rate application rate greater than or equal to 0,26 mm/h for sprayers
20、with flow rates exceeding 75 l/h and 0,13 mm/h for sprayers with flow rates equal to or less than 75 l/h ISO 8026:2009(E) 2 ISO 2009 All rights reserved3.5 irrigation lateral branch supply line in an irrigation system on which water distribution devices, such as sprayers, are mounted directly or by
21、means of fittings, risers or tubes 3.6 irrigation sprayer device that discharges water in the form of fine jets or in a fan shape without rotational movement of its parts 3.7 maximum working pressure highest pressure immediately upstream from a sprayer, as specified by this International Standard or
22、 the manufacturer, to ensure continuous operation and functionality specific to the device 3.8 minimum working pressure lowest pressure immediately upstream from a sprayer, as specified by this International Standard or the manufacturer, to ensure continuous operation and functionality specific to t
23、he device 3.9 nominal flow rate volume of water discharged per unit of time from a sprayer under test pressure 3.10 non-regulated sprayer non-pressure-compensating sprayer sprayer with a variable flow rate at varying water pressures at the sprayer inlet 3.11 nozzle aperture or adjutage of the spraye
24、r through which water is discharged 3.12 pop-up sprayer irrigation sprayer designed for installation such that the sprayer nozzle is below ground level when it is not pressurized and above ground when it is pressurized 3.13 radius of throw wetted radius distance measured from a continuously operatin
25、g sprayer to the most remote point at which the sprayer deposits water at a minimum rate of 0,26 mm/h for a sprayer with a discharge exceeding 75 l/h and at a minimum rate of 0,13 mm/h, for a sprayer with a discharge equal to or less than 75 l/h, measured at any arc of coverage, except near the arc
26、extremes for part-circle sprayers 3.14 range of regulation all of the working pressures at the inlet of a regulated sprayer within which the sprayer is declared by the manufacturer to regulate flow within a specified accuracy 3.15 range of working pressures all of the working pressures between the m
27、inimum working pressure and the maximum working pressure 3.16 regulated sprayer sprayer that maintains a relatively constant flow rate at varying water pressures at the sprayer inlet within the limits specified by the manufacturer ISO 8026:2009(E) ISO 2009 All rights reserved 33.17 spray coverage pa
28、ttern area wetted by the sprayer, which operates according to the conditions specified by the manufacturer 3.18 test pressure pressure at the inlet of a sprayer declared by the manufacturer as the pressure to be used for test purposes NOTE In the absence of such a declaration, 200 kPa is used. 3.19
29、trajectory angle angle above the horizontal plane of the water spray discharged from a sprayer nozzle operating at test pressure 3.20 trajectory height maximum height above a sprayer of the trajectory of the water spray discharged from the sprayer nozzle operating at test pressure 3.21 water distrib
30、ution curve distribution curve graphical plot of water application depth as a function of distance from a sprayer along a specified radius 3.22 water outlet height height above ground level of the water outlet of a sprayer when the sprayer is installed as specified by the manufacturer 4 Classificati
31、on 4.1 Classification according to uniformity of coverage 4.1.1 Uniform spray coverage pattern 4.1.2 Non-uniform spray coverage pattern 4.2 Classification according to water-spray characteristic(s) 4.2.1 Area of coverage 4.2.1.1 Circular 4.2.1.1.1 Full-circle 4.2.1.1.2 Part-circle 4.2.1.1.2.1 Fixed-
32、pattern 4.2.1.1.2.2 Adjustable pattern 4.2.1.2 Non-circular (polygonal, rounded non-circular) 4.2.2 Type of spray 4.2.2.1 Sheet spray 4.2.2.2 Jet spray ISO 8026:2009(E) 4 ISO 2009 All rights reserved4.3 Classification according to performance characteristics (flow rate regulation) 4.3.1 Regulated sp
33、rayers 4.3.2 Non-regulated sprayers 4.4 Classification according to type of connection 4.4.1 Threaded 4.4.2 Insert barb 4.4.3 Bayonet 4.4.4 Other 4.5 Classification according to additional functions 4.5.1 Pop-up/fixed 4.5.2 Valve in head 5 General requirements 5.1 Materials The plastics parts of the
34、 sprayers, which conduct water and which are exposed to sunlight, shall be opaque and shall contain an additive to protect against UV radiation. Sprayers may be made from a copper alloy or from other materials, whose mechanical properties and resistance to corrosion when used with irrigation water a
35、re similar to those of copper alloys. On request, the manufacturer shall provide information about the resistance of the sprayer to chemicals used in agriculture. 5.2 Manufacture and assembly The sprayers shall have no manufacturing defects which might be detrimental to their operation. The sprayers
36、 shall incorporate features for easy fitting and assembly. All sprayers equipped with removable parts shall be easy to assemble manually or by using common tools. Should any special tool be required, the manufacturer shall be able to furnish them on request. The removable parts of one sprayer shall
37、be interchangeable with those of other units of the same make and type. 5.3 Connections The sprayer connections shall be specified according to the connection type and the corresponding International Standard. 5.3.1 Threaded connection For sprayers designed for threaded connection to irrigation late
38、rals, the screw threads shall comply with ISO 7-1. Alternatively, other threads may be allowed provided that a suitable adaptor is supplied with each threaded connection, making it comply with ISO 7-1. ISO 8026:2009(E) ISO 2009 All rights reserved 55.3.2 On line connection The manufacturer shall spe
39、cify the type and size of flexible tube for which the connections are suitable. All complementary information shall be supplied by the manufacturer. 6 Test methods 6.1 Measurements The accuracy required for all measurements not specifically addressed in this International Standard shall be 3 %. Appl
40、ication depths within collectors shall be measured to an accuracy of 1 %. The test pressure shall not vary by more than 2 % during the test period. The pressure shall be measured to an accuracy of 1 %. The flow rate through the sprayer shall be measured to an accuracy of 1 %. The temperature shall b
41、e measured to an accuracy of 0,5 C. For indoor testing, the water temperature shall be (23 3) C. Time shall be measured with stopwatches accurate to 0,1 s. 6.2 General test conditions Perform the test on sprayers which have previously been examined visually (without disassembly) for satisfactory wor
42、kmanship and quality. Attach test sprayers to the supply line according to the field assembly recommendations of the manufacturer. Maintain the sprayer within 2 of vertical. There shall be no visually detectable external leakage during the test. Sprayers of the same type, but with different nozzles
43、or different means of attachment, shall be tested separately for each combination of sprayer and nozzle or sprayer and means of attachment. Collectors shall be designed in accordance with ISO 15886-3:2004, 4.1, and shall incorporate the following features. a) They shall be identical. b) The vertical
44、 dimension of each collector shall be at least twice the maximum depth of the water collected during the test, but not less than 150 mm. c) The circular opening with sharp edges shall be free of deformities. d) The diameter shall be from one half to one times the height, but shall not be less than 8
45、5 mm. The opening of all collectors shall be in a common horizontal plane, with a slope not exceeding 2 % in any direction. Sprayer nozzle height above the openings of the collectors shall be 0,20 m or at a height as specified by the manufacturer. ISO 8026:2009(E) 6 ISO 2009 All rights reserved6.3 H
46、ydraulic tests Perform the tests indoors, in drift-free conditions or in an outdoor area under no wind conditions (maximum allowable wind speed less than 0,5 m/s). Relative humidity and ambient temperature shall be measured at the start, midpoint and end of the test. For indoor testing, changes in t
47、emperature and humidity during the test shall not exceed 5 % of the pre-test ambient. In order to take evaporation into account, put three control collectors into the test area, but outside the sprayer range. Place the target depth of water in each collector just prior to the start of the test. At t
48、he conclusion of the test, measure the final water depth and compute the evaporation by subtracting the final from the initial water depth and averaging the three results. Prior to conducting the functional and operational tests, operate each test sprayer for 1 h at test pressure, in order to establ
49、ish stable conditions. 6.3.1 Hydraulic test to be performed for each type of sprayer The minimum tests to be performed for each type of sprayer are shown in Table 1. Table 1 Hydraulic tests Hydraulic test Sprayer type Diameter of coverage Spray coverage pattern Water distribution curve Uniformity of flow rate Flow rate as a function of inlet pressure Trajectory height Uniform spray coverage pattern plus full circle 6.3.2 Method 2 6.3.3 Method 1 6.3.4 Method 2 6.3.5 6.3.6 6.3.7 Uniform spray coverage p
