Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T 7284-1994
Stretcher-type motorized sprayer
Issued on July 18, 1994
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1995
Machinery Industry Standard of the People's Republic of China
Stretcher-type motorized sprayer
Subject content and scope of application
JB/T7284-1994
This standard specifies the type, model and basic parameters, technical requirements, test methods, inspection rules and requirements for marking, packaging, transportation and storage of stretcher-type motorized sprayers equipped with piston pumps, plunger pumps and piston diaphragm pumps with a working pressure of 1.5~2.5MPa and a flow rate of 30~40L/min.
This standard applies to stretcher-type motorized sprayers (hereinafter referred to as sprayers), and other frame-type sprayers can refer to it for implementation. Reference standards
GB2828
GB/T13306
ZBB91024
ZB B91034
Counting sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) Labels
Technical conditions for three-cylinder piston pumps for sprayers
ZMB series medium-pressure piston diaphragm pumps
Types, structures and basic dimensions of spray parts for motorized sprayers Technical conditions for spray parts and components for spray powder sprayers Test methods
Painting of agricultural machinery
Types, models and basic parameters
3.1 Type
Stretcher type.
3.2 Model
The model of the sprayer consists of three parts: category code, characteristic code and main parameters. The model marking examples are as follows: 3WH-36 type 3WZ-40 type 3WM-40 type
3.3 Basic parameters
Rated flow (main parameter), L/min
Characteristic code H-piston pump; Z-plunger cold pump; M-diaphragm pump sprayer (category code group number)
Plant protection machinery (category code classification number)
The power matching of the sprayer should meet the requirements of Table 1. Table 1
Matching power
Diesel engine, gasoline engine, motor
Approved by the Ministry of Machinery Industry on July 18, 1994
2.2~3.0kW
Implemented on July 1, 1995
JB/T72841994
The performance of the sprayer product should meet the requirements of Table 2. Table 2
Performance parameters
Working pressure
Maximum pressure
Rated speed
Volumetric efficiency
Total efficiency
Oil temperature
Oil temperature rise
Long-range spray gun (spray hole diameter
Horizontal range
Spray volume
Spray angle
Technical requirements
Adjustable spray gun (spray hole diameter||tt ||Long-range spray gun (spray hole diameter
Adjustable spray gun (spray hole diameter
93.0mm）
Double-head spray head (spray hole diameter 1.3
Four-head spray head (spray hole diameter 1.3
Adjustable spray gun maximum spray angle
Single spray head in multi-head spray head
Piston pump
Piston pump piston diaphragm pump
600~900
37.6 ±10%
18.3±10%
2.42 ±10%
4.72±10%
Measured at rated speed and average working pressure
Measured after the pump has been running continuously for 30 minutes at rated speed and maximum working pressure
Injection pressure 1.0MPa
Injection pressure 1.5MPa
Injection pressure 1.0MPa
Injection pressure 1.5MPa
Maximum opening
Injection Pressure 1.5MPa
Spray pressure 1.5MPa
Sprayers should be manufactured according to drawings and technical documents approved by the prescribed procedures and meet the requirements of this standard. The performance indicators of the liquid pump used in the sprayer should meet the requirements of the relevant liquid pump in Article 3.3.2 of this standard. 4.2
4.3 The performance indicators of the supporting power should meet the requirements of the corresponding standards. 4.4 The structure of the spray hose, nozzle, spray gun and the connection dimensions of the corresponding parts and components should meet the requirements of NJ194. 4.5 The starting performance of the sprayer should be carried out under the state of pump pressure relief. The number of starts should be less than or equal to 3 times. Each start can be operated twice, and the starting time of each start should not exceed 30s, with an interval of 2min each time. 4.6 The assembled sprayer should be tested for 0.5h at the maximum working pressure. There should be no abnormal vibration, noise, loose fasteners, water or oil leakage during operation (the dripping of the plunger seal of the plunger pump should not exceed 1mL/min). 2
JB/T7284—1994| |tt||4.7 The pressure regulating valve of the sprayer should be sensitive and reliable when spraying. When the sprayer is running at rated speed, close the stop valve and pull the pressure reducing handle. The pressure should drop quickly to below 0.5MPa. When the pressure regulating hand wheel is completely loosened, the pressure shall not exceed 1.0MPa. 4.8 The pressure resistance performance index of the pump parts shall meet the requirements of ZBB91024 and ZBB91034. 4.9 The long-range spray gun and adjustable spray gun shall be tested for water pressure tightness at a pressure of 3.0MPa, and there shall be no leakage within 30s. 4.10 The spray rod parts (shutoff valve, filter sleeve, spray rod, multi-head nozzle) shall be tested for water pressure tightness at a pressure of 1.5MPa, and there shall be no leakage or sweating within 30s.
4.11 The spray hose shall be tested for water pressure tightness at a pressure of 4.0MPa, and there shall be no cracking, delamination or local bulging within 1min. Exposed rotating parts must have safety protection devices. 4.12
The appearance of the sprayer should be neat and tidy, without rust stains, oil stains, obvious paint peeling, bumps, scratches and other defects. The paint of the sprayer should comply with the relevant provisions of NJ/Z3. 4.14
The mean time to first failure (MTTFF) of the sprayer shall not be less than 50h, and the effectiveness shall not be less than 96%. 5 The sprayer shall be subjected to a 500h durability test. During the test, it is allowed to replace wearing parts, but other parts and components shall not be replaced. 4.16
The test pressure is the average value of the working pressure. After the test, the volumetric efficiency and total efficiency are allowed to drop to 95% of the values specified in the standard. 7 When the product leaves the factory, the required spare parts (wearing parts), accessories and tools shall be prepared according to the provisions of the manual. 4.17
4.18 If the provisions in the referenced standards are inconsistent with this standard, the provisions of this standard shall prevail. 5 Test methods
5.1 The performance of the whole machine of the sprayer shall be carried out in accordance with NJ204 and this standard. 5.2 The operation test of the sprayer shall be equipped with a spray hose and sprayed with a spray gun. The test medium is clean water at room temperature. At rated speed and maximum working pressure, it shall be operated continuously for 0.5h.
5.3 The pump performance test and the durability test of the sprayer shall be carried out on a bench. The electric motor shall be used as the power and clean water at room temperature shall be used as the test medium. The calculation table of the pump performance test is shown in Appendix A (reference). 5.4 The starting performance test of the sprayer shall be carried out under the state of pressure relief with the pump. The sprayer equipped with a gasoline engine shall be tested at an ambient temperature not lower than -5℃, and the sprayer equipped with a diesel engine shall be tested at an ambient temperature not lower than 5℃. 5.5 Reliability test
5.5.1 Mean time to first failure (MTTFF) At rated speed and average working pressure, use a spray gun to spray and measure the average working time (h) before the first failure of the sprayer, and calculate the average value. The test medium is clean water, and the timing cut-off time is 100h. The average working time before the first failure is calculated according to formula (1): MTTFF=2_1
Where: T total working time, h;
n number of sample test units;
r number of failure units;
t—accumulated working time when the i-th sprayer has the first failure, h; fo—timing cut-off test time, h.
5.5.2 Effectiveness
..... ()
Under the conditions of rated speed and average working pressure, use the spray gun to carry out a 300h bench test to determine its effectiveness. The test medium is clean water. During the test, except for the wearing parts, no other parts are allowed to be replaced. The effectiveness is calculated according to formula (2):
Wherein: K—effectiveness;
T. —fault elimination time, h;
T—pure working time, h.
Testing rules
6.1 Before the sprayer leaves the factory, each sprayer shall be subjected to factory tests according to the items and requirements specified in Table 3. The test method shall comply with the provisions of NJ204 and this standard. The product certificate can only be issued after the manufacturer's quality management department verifies that the test results meet the requirements of this standard. When the product quality is stable, on the basis of strict inspection of parts and components, the factory inspection of the whole machine can be spot-checked once a month, with no less than two units each time. When the production is transferred to another factory or stopped for more than one year, or when there are major changes in design, process, materials, etc., the type 6.2
test of the whole machine should be carried out. In addition to the comprehensive test of Table 3 of this standard, the type test shall also be carried out according to the provisions of Article 4.15 of this standard for the average working time before the first failure and the effectiveness measurement, and the 500h endurance test shall be carried out according to the provisions of Article 4.16 of this standard. Table 3
Appearance of the whole machine
Starting performance
Operating performance
Sensitivity and reliability of pressure regulating valve
Pump oil temperature rise
Pump volumetric efficiency
Pump total efficiency
Hydrostatic test
Spray volume
Horizontal range
Packaging integrity inspection
Type test is carried out every three years during normal production. To
Meet the requirements of Article 4.13 of this standard
Meet the requirements of Article 4.5 of this standard
Meet the requirements of Article 4.6 of this standard
Meet the requirements of Article 4.7 of this standard
Meet the requirements of Article 3.3.2 of this standard
Meet the requirements of Article 3.3.2 of this standard
Meet the requirements of Article 3.3.2 of this standard
Meet the requirements of Articles 4.8 to 4.11 of this standard
Meet the requirements of Article 3.3.2 of this standard
Meet the requirements of Article 3.3.2 of this standard
Meet the requirements of Articles 7.2 to 7.4 of this standard
The ordering unit may re-inspect the product quality according to this standard. The sampling method and AQL value shall be determined by negotiation between the supplier and the buyer in accordance with the requirements of GB2828. 6.4
7 Marking, packaging, transportation and storage
Each sprayer shall be equipped with a product label at the specified location. The type of product label shall comply with the provisions of GB/T13306. The product label includes the following:
Sprayer model and name;
JB/T7284-1994
. Main technical parameters: speed, flow, working pressure, maximum pressure; b.
Manufacturer name;
Factory date (or number).
The sprayer shall be packed firmly and reliably when leaving the factory, meet the transportation requirements, and have moisture-proof and pressure-proof measures. The outside of the packaging box should be marked with:
Product name, model;
Gross weight, kg;
Volume of the packaging box (length × width × height), mm; Manufacturer's name;
"Handle with care", "Do not invert", "Moisture-proof", "Pressure-proof" and other precautions or signs. When the sprayer leaves the factory, the packaging box should be equipped with product certificates, product instructions, packing lists and spare parts (wearing parts), accessories and random tools.
7.5 The sprayer should be stored in a ventilated and dry warehouse and should not be mixed with corrosive substances. 5
Manufacturer:
Pump model:
Pump number:
Piston diameter x stroke (dxS):
Rated speed:
Test location:
Additional notes:
Measured value
Measurement time
JB/T7284—1994
Appendix A
Pump performance test calculation table
(reference)
Inlet pipe diameter D:
Outlet pipe diameter D:
Theoretical flow rate Qt:
Working medium:
Test personnel:
This standard is proposed and managed by the Chinese Academy of Agricultural Mechanization Sciences. Pressure
Atmospheric pressure:
Ambient temperature:
Relative humidity:
Oil temperature rise:
Test date:
Convert to the calculated values under rated speed
Record:
Proofreading:
This standard was drafted by the Chinese Academy of Agricultural Mechanization Sciences and Nanjing Agricultural Mechanization Research Institute. The main drafters of this standard are Fan Lianying and Fu Ximin. 6
Year Month Date
People's Republic of China
Mechanical Industry Standard
Stretcher-type Motorized Sprayer
JB/T 72841994
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Format 880×1230
Postal Code 100044)
1/16 Printing Sheet 5/8
Word Count 12,000
First Edition April 1995
First Printing April 1995
Print Quantity 1-500
Price 8.00 Yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn6：
Outlet pipe diameter D:
Theoretical flow rate Qt:
Working medium:
Test personnel:
This standard is proposed and managed by the China Agricultural Mechanization Science Research Institute. Pressure
Atmospheric pressure:
Ambient temperature:
Relative humidity:
Oil temperature rise:
Test date:
Converted to the calculated values under rated speed
Record:
Proofreading:
This standard was drafted by the China Agricultural Mechanization Science Research Institute and Nanjing Agricultural Mechanization Research Institute. The main drafters of this standard are Fan Lianying and Fu Ximin. 6
Year Month Date
People's Republic of China
Mechanical Industry Standard
Stretcher-type Motorized Sprayer
JB/T 72841994
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Format 880×1230
Postal Code 100044)bzxz.net
1/16 Printing Sheet 5/8
Word Count 12,000
First Edition April 1995
First Printing April 1995
Print Quantity 1-500
Price 8.00 Yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn6：
Outlet pipe diameter D:
Theoretical flow rate Qt:
Working medium:
Test personnel:
This standard is proposed and managed by the China Agricultural Mechanization Science Research Institute. Pressure
Atmospheric pressure:
Ambient temperature:
Relative humidity:
Oil temperature rise:
Test date:
Converted to the calculated values under rated speed
Record:
Proofreading:
This standard was drafted by the China Agricultural Mechanization Science Research Institute and Nanjing Agricultural Mechanization Research Institute. The main drafters of this standard are Fan Lianying and Fu Ximin. 6
Year Month Date
People's Republic of China
Mechanical Industry Standard
Stretcher-type Motorized Sprayer
JB/T 72841994
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Format 880×1230
Postal Code 100044)
1/16 Printing Sheet 5/8
Word Count 12,000
First Edition April 1995
First Printing April 1995
Print Quantity 1-500
Price 8.00 Yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn6
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