GB/T 33006-2016 English PDF (GBT33006-2016)

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GB/T 33006-2016: Electrostatic sprayer -- Technical requirements
GB/T 33006-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.060.40
B 91
Electrostatic Sprayer – Technical Requirements
ISSUED ON: OCTOBER 13, 2016
IMPLEMENTED ON: MAY 01, 2017
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Model Marking and Basic Parameters ... 5
5 Technical Requirements ... 6
6 Test Methods ... 12
7 Inspection Rules ... 18
8 Packaging, Transportation and Storage ... 19
Appendix A (Informative) Test Equipment and Measuring Tools ... 21
Appendix B (Informative) Example of Calculation Method of Mist Flow Coverage 22
Electrostatic Sprayer – Technical Requirements
1 Scope
This Standard specifies the model marking, basic parameters, technical requirements, test
methods, inspection rules, packaging, transportation and storage of electrostatic sprayer.
This Standard applies to battery-powered electrostatic sprayer with rated working pressure not
exceeding 1.0MPa, such as backpack, shoulder, and portable electrostatic sprayers operated by
a single person.
2 Normative References
The following documents are essential to the application of this Document. For the dated
documents, only the versions with the dates indicated are applicable to this Document; for the
undated documents, only the latest version (including all the amendments) is applicable to this
Document.
GB/T 191 Packaging – Pictorial marking for handling of goods
GB 4706.18 Household and similar electrical appliances-Safety-Particular requirements
for battery chargers
GB/T 9480 Tractors machinery for agriculture and forestry, powered lawn and garden
equipment - Operators manuals - Content and presentation
GB 10396 Tractors, machinery for agriculture and forestry, powered lawn and garden
equipment - Safety signs and hazard pictorials - General principles
GB/T 19639.1-2014 General purpose valve-regulated lead-acid batteries - Part 1:
Technical conditions
GB/T 20085 Equipment for crop protection - Vocabulary
JB/T 9781-2011 Sprayer - Spray parts
JB/T 9782-2014 Equipment for Crop Protection - General Test Methods
5 Technical Requirements
5.1 Safety requirements
5.1.1 Sealing performance
Sealing performance requirements are as follows:
a) Fill the liquid tank with clean water of rated capacity; cover the lid of the liquid tank; and
tilt the liquid tank forward, backward, left, and right to a position of 45° with the plumb
line. There shall be no leakage at any joint.
b) When the electrostatic sprayer sprays at the highest working pressure that can be achieved,
and when the liquid pump is running and the shut-off valve is in the closed position, all
components and their connections shall be sealed reliably and without leakage.
5.1.2 Liquid pump overload protection device
The liquid pump of the electrostatic sprayer shall take overload protection measures. When the
electrostatic sprayer is working under working pressure, close the water outlet shut-off valve
and the pressure in the liquid pump shall be no higher than 1.2 times the maximum working
pressure.
5.1.3 Pressure resistance performance of spray parts
The spray parts of the electrostatic sprayer shall comply with the provisions of 4.1.3 in JB/T
9781-2011.
5.1.4 Electrical system
The electrical system requirements are as follows:
a) The electrical system of the electrostatic sprayer shall have good insulation properties and
take waterproof measures. The liquid overflowing from the liquid tank shall not flow into
or drip onto the electrical components. All wiring shall not be exposed, and insulating
conduits shall be installed when wires pass through holes. The insulation resistance value
between the battery terminal and the metal parts of the machine shall be no less than
2MΩ.
b) The wiring specifications of the electrical system shall be adapted to the current size;
switches and buttons shall be easy to operate and shall not be turned on or off by
themselves due to vibration.
c) Electrical components shall be installed firmly, have correct polarity, and be marked with
clear polarity symbols. They shall not be loose, damaged, short-circuited or open-
circuited due to vibration or other reasons.
d) The electrical system shall have undervoltage, overload and short-circuit protection
functions.
e) Effective protective measures shall be taken to prevent high-voltage static electricity from
causing harm to the operator.
5.2 Requirements of overall machine performance
5.2.1 Total mass of electrostatic sprayer
After adding the rated capacity of clean water into the liquid tank, the total mass of the
electrostatic sprayer shall not exceed 25kg.
5.2.2 Spray performance
The spray performance requirements are as follows:
a) When the DC motor operates at rated voltage, the spray pressure of the electrostatic
sprayer shall reach the working pressure value specified in the instruction manual;
b) When the electrostatic sprayer sprays at working pressure, the mist flow shall be uniform
and continuous, with a complete mist shape; the atomization shall be good;
c) The droplet volume median diameter (VMD) of the electrostatic sprayer when spraying
at working pressure shall be no greater than 150μm.
5.2.3 Nozzle spray volume deviation
When the electrostatic sprayer sprays at working pressure, the deviation of the actual spray
volume of the nozzle from the manufacturer's expressly rated spray volume shall not exceed
±8%.
5.2.4 Charging performance of electrostatic devices
The electrostatic device of the electrostatic sprayer shall have good charging performance.
When spraying at working pressure, the charge-to-mass ratio of the mist flow shall be no less
than 0.4mC/kg.
5.2.5 Amount of mist droplets deposited on the back of the target
When the electrostatic sprayer sprays at rated voltage and working pressure, the ratio of the
coverage rate of the mist flow deposited on the back of the target to the coverage rate of the
mist flow on the front of the target shall be no less than 0.1.
5.2.6 Continuous working time
The continuous normal spray working time of the standard electrostatic sprayer battery after
one saturated charge shall be no less than 4 h.
a) There shall be a clear liquid level line indicating the rated capacity on the outer surface
of the liquid tank. The deviation of the actual capacity at the liquid level line from the
rated capacity of the liquid tank shall not exceed ±5%;
b) The total capacity of the liquid tank shall be at least 5% larger than the rated capacity;
c) The diameter of the liquid filling port of the liquid tank shall be no less than 100mm;
d) The liquid tank lid shall be reliably connected to the mouth of the liquid tank to ensure
that it does not become loose or open accidentally during use.
5.3.3 Liquid pump
The requirements of liquid pump are as follows:
a) When the liquid pump operates at rated speed and maximum working pressure, there shall
be no abnormal vibration, noise, loose fasteners, etc.
b) The pump body shall have good pressure resistance. When the pressure test is performed
at 2 times the maximum working pressure, there shall be no rupture, leakage, etc.
5.3.4 Electrostatic generator
The requirements of electrostatic generator are as follows:
a) When a DC power supply...