This standard specifies the quality indicators, testing methods and inspection rules for rice combine harvesters. This standard is applicable to the evaluation of the quality of rice combine harvesters. NY/T 498-2002 Quality of rice combine harvesters NY/T498-2002 Standard download decompression password: www.bzxz.net

Agricultural Industry Standard of the People's Republic of China NY/T 498-2002 Operating quality for rice combine harvesters Issued on January 4, 2002 Implementation on February 1, 2002 Issued by the Ministry of Agriculture of the People's Republic of China NY/T 498-2002 Agricultural Industry Standard is issued by the Ministry of Agriculture's Agricultural Machinery Management Bureau This standard is issued by the National Agricultural Machinery Standardization Technical Committee Agricultural Machinery Sub-Technical Committee. The drafting units of this standard are: Agricultural Machinery Testing and Certification Center of the Ministry of Agriculture, Agricultural Machinery Certification Station of Yunnan Province, and Agricultural Machinery Application Research Institute of Longjiang Province.
Main contributors to this standard: Li Boqiang, Liu Jiu, Meng Jingpin, Xian Jin, Zhang Liming 1 Scope
Agricultural Industry Standard of the People's Republic of China
Operatiny quality for rtte combine hurvestersNY/T49B—2002
This standard specifies the quality criteria, test methods and inspection plan for harvesting operation of water-cooled combine harvesters. This standard is applicable to the assessment of the harvesting operation quality of water-cooled combine harvesters. 2 Reference standards
The texts contained in the following standards are used in this standard and constitute the provisions of this standard. When this standard is published, the versions shown are valid. All standards will be revised and the parties who use the standards should explore the possibility of using the latest versions of the following standards. GB/T28251987 Sampling sequence and sample description table for batch inspection (applicable to inspection of continuous batches) 3 Definitions
This standard adopts the following definitions.
3.1 Tip rate
The percentage of grain quality lost due to mechanical damage in rice harvesting. 3.2 Broken rate
The percentage of grain quality lost due to mechanical damage in rice harvesting. 3.3
The percentage of impurities in harvested grains in total quality. 3.4 Height
The degree of lodging of crops on the ground after harvest. 3.5 Crop condition
Expressed by no lodging, moderate lodging and severe lodging, with the angle between the root and the stem and the ground as an example. -3\ is an excellent example. 506C is a moderate example, and above is a severe lodging. 3.6 Distance from the highest point of the crop to the ground under natural conditions. 3.7 Ear width difference
Ground height and the lowest plant base (ground height > ear tip length. 3.8 Pollution
Pollution caused by oil leakage from machinery and equipment to seed, stem and upper reaches. 4 Operation quality index
4.1 The operation quality precision values ​​specified in this standard are determined under the following general operation conditions: Harvesting should be carried out during the waxy or mature stage of the sugar cane: There should be basically no natural grains in the plot, no waterlogging, and the grain moisture content is 15% to 30%. The Ministry of Agriculture of the People's Republic of China approved the implementation of the semi-feeding combine harvester in January 2002 and the NY/T498-2002 in February 2002. The operation quality assessment requires that the natural height of the grains should be 350mm~1100mm, and the width should be ≤25umm. 4. 2. Under the working conditions, the quality of rice combine harvester's loading and unloading operation shall meet the requirements of Table 1. The working quality standard includes the interception rate, surplus rate, special combination rate, non-receiving and receiving equipment, and the pollution-free environment. Item
Scrape the burial height 51B\; The top and edge of the land are treated with the agent. There is no obvious pollution in the seed. 1) It is suitable for the combined harvester with no sieve marks and the combined harvester with the stem cutting machine. 3) The standard height of the full-scale water combined harvester can be determined according to the requirements. 5 Testing methods
The operation quality assessment is carried out in the harvesting state:Www.bzxZ.net
5. 1 Sampling method
Along the midpoint of the length and width of the plot, connect the cross and turn the plot into one piece, and randomly select two pieces as the test sample. 5.2 Determination of the location of the test points
Use the diagonal lines of the four corners of the sample plot, select a ratio within the range of one quarter to one eighth of the diagonal length, and then determine the location of the four test points by consultation, plus the midpoint of the diagonal line. 5.3 Testing method
5.3.1 Accurate height
According to 5.3, five points are selected. Each point is located on the working width. There are 5-point difference heights. The average is the accurate height of the point. Find the average value of the five points.
5.3.2 Estimated loss rate
At each sampling point, a sampling area with a length of 1 meter and a width of the machine's working width is drawn along the forward direction of the harvester. In the sampling area, all the stems and heads are inspected. After the grains are cleaned, the number of grains per square meter is calculated. According to the harvested grains and the corresponding harvested area, the grain yield per square meter is calculated, and the loss rate is calculated by the formula. Find the average value of the five points. S
In the formula, S is the maximum value, and the grain loss amount per square meter is 1 meter. The grain loss amount per square meter is recorded as 1 meter. 5.3.3 Randomly select 5 samples from the grains harvested by the combined harvester under normal operation. Each sample contains no less than 30 ml of granules. Mix them thoroughly. Take out 5 samples from the mixture and grind them. Remove the straw, stalks and other impurities. The difference between the samples before and after treatment is the mass of impurities in the sample. Calculate the impurity content according to formula (2). Take the average impurity content of the 5 samples, or the impurity content, and get the mass of impurities in the sample. 5.3.4 NY/T498—2002, (%) =
After combining the quality grains, divide them into 5 groups by quartering method, name them as the mother group, pick out the broken grains for analysis, calculate the acid breakage rate according to the formula (?), take the 5 samples and compare the average value of broken grains (%)
Where:
Acid breakage rate,
The quality of broken grains in the sample
The quality of the sample
5.3.5 Set aside
At each sampling point, collect all the broken grains within the area of ​​m, and then select the ones with a broken length of 15 m is not qualified, according to formula (4), calculate the crushing quality of the parts, find the average value of 5 points ()
-m×100
, F
crushing quality%,
net:-measuring point total quality
measuring point unqualified quality analysis 18.
5-3.6 After harvesting: surface condition and pollution situation Use the monthly measurement method to observe whether there is pollution caused by the combine harvester in the kernels, whether there is sun pollution caused by the combine harvester in the stems and plots; observe whether there are leaks in the plots and the head of the field, Whether the location of the site is reasonable, 6.1.1.1. Any item that does not meet the requirements of this standard is considered unqualified. 6.1.2. The unqualified items are divided into two categories, A and B, according to the degree of influence on the quality of the work. The unqualified items are classified in Table 2: Table 2 Unqualified items and classification Unqualified items and classification 6.2. Judgment principles Loss rate Grain pollution condition Contains miscellaneous materials Stem broken rate
Surface condition and height of the system after obtaining the quality
Stem Xuan. Technical pollution
According to the relevant provisions of Articles 4.4 and 4.8 of GB/12823-1987, the oil sample is judged by the following items: Table 3, in which AQL is the qualified quality level, A is the qualified judgment number, K is the complete unqualified classification without qualification judgment
and the number of local blocks
Exemplary sample
Jing Gu Cheng Ping
Sample word Ma
Qualified quality level
Numbilical agent constant A.
Unqualified demarcation R
NY/T 498--2002
Table 3 Determination
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