JB/T 9792.2-1999 This standard is a revision of NJ 409.2-86 "Technical Requirements for Separate Grain Rice Mills". The main technical content has changed after the revision. This standard specifies the technical requirements, test methods and acceptance rules, marking, packaging, storage, etc. of separate grain rice mills. This standard is applicable to separate grain rice mills. This standard was first issued in 1986. JB/T 9792.2-1999 Technical Requirements for Separate Grain Rice Mills JB/T9792.2-1999 Standard download decompression password: www.bzxz.net

ICS 65.040.20
Machinery Industry Standard of the People's Republic of China
JB/T9792.2-1999
Specifications for separating minor food grains mill1999-08-06 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9792.2-1999
This standard is a revision of NJ409.2-86 "Technical Specifications for Separating Minor Food Grains Mill". Compared with NJ409.2-86, the main technical contents of this standard are as follows: 1. The regulations on paint quality are changed, and the requirements for coating thickness are added; 2. The reliability assessment is changed to the working time before the first failure assessment; 3. Some tolerance grades are changed, and some technical requirements are changed and added. This standard replaces NJ409.2--86 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by the National Technical Committee for Agricultural Machinery Standardization. The responsible drafting units of this standard are: Liaoning Agricultural Mechanization Research Institute, China Agricultural Mechanization Science Research Institute. The main drafters of this standard are: Chen Qidong, Jin Changming, Li Zhiqing. This standard was first issued and implemented in 1986 and revised for the first time in 1999. 1 Scope
Machinery Industry Standard of the People's Republic of China
Technical Conditions
Separating Minor Food Grains Rice Mill
Specifications for separating minor food grains millJB/T9792.2-1999
Replaces NJ409.2-86
This standard specifies the technical requirements, test methods, acceptance rules, marking, packaging and storage of separating minor food grains rice mills. This standard applies to separating minor food grains rice mills (hereinafter referred to as rice mills). 2 Referenced Standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 1184-1996
GB/T1804-1992
GB/T 3943-1983
.GB/T8231-1987
GB/T8232-1987
GB/T9439-1988
GB/T- 11350—1989
GB/T11766—1989
JB/T 5673-1991
JB/T 6083--1992
JB/T9792.3—1999
3 Technical requirements
Tolerances of shape and position without tolerance valueWww.bzxZ.net
General tolerances without tolerance of linear dimensions
Sieve plates with round and long holes
Millet
Gray iron castings
Machining allowance of castings
Painting of agricultural and forestry tractors and implements·General technical conditions Rice milling wheels
Test methods for separate rice milling machines
3.1 It shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 3.2 When the raw grain (sorghum) of the same standard as specified in GB/T8231 is added, and the raw grain (millet) of the same standard as specified in GB/T8232 is added, the performance of the rice milling machine shall comply with the provisions of Table 1. 3.3 The rice milling grinding wheel shall be manufactured in accordance with JM1A or JM1B specified in JB/T6083. 3.4 The rice sieve shall be manufactured in accordance with GB/T3943. 3.5 Gray iron castings shall be made of HT200 gray cast iron with mechanical properties not lower than those specified in GB/T9439. The main parts are not allowed to have defects that affect the strength, such as sand holes, looseness, pores, shrinkage holes and insufficient pouring. 3.6 The tolerance of cast iron parts shall be manufactured in accordance with the 8-level precision specified in GB/T11350. 3.7 The shape and position tolerances of the machined parts shall comply with the provisions of GB1184, and the tolerance values ​​of the straightness, flatness, coaxiality and symmetry shall be L level. The limit deviation of the unfilled tolerance size of the machined parts shall be manufactured in accordance with the level specified in GB/T1804. Approved by the State Bureau of Machinery Industry on August 6, 1999, implemented on January 1, 2000
Rice output rate
Red and white rate
Total impurity rate
Hull rate
Grain rate
Broken rice rate
Power consumption per ton of material
Temperature rise of finished rice
1.Dust concentration in the working area
Life of rice screen
Life of rice screen in months
Life of rice screen
Working time before first failure
kw·ht
JB/T9792.2-1999||tt ||≥250
≥150
≥200
Vegetables (grains
18=Qk, where: S-should rice yield, %; Q-pure grain rate, %; k-rice yield conversion coefficient [can be checked in Appendix A (Appendix to the standard) according to the grain capacity].
2 Broken rice refers to the broken grains that pass through the 1.2mm diameter round hole sieve and remain on the 1.0mm diameter round hole sieve. See GB/T11766--1989. 3.8
All parts must be inspected and qualified, and purchased parts and outsourced parts must have qualified certificates before they can be assembled. Rice milling After the grinding wheel is assembled with the main shaft, the circular runout of the grinding wheel shall not exceed 1.5mm. The fan impeller must be statically balanced, and the allowable unbalanced torque is 0.015N·m. The rotating part should be flexible and light, and there should be no jamming. Devices such as the feed gate, outlet baffle and knife stop should be flexible to adjust and reliably fixed. When the rice mill is working at full load, the temperature rise of the bearing shall not exceed 20℃. 3.14 The quality of the paint on the surface of the whole machine shall not be lower than the requirements of ordinary weather-resistant coatings in JB/T5673, the total thickness of the paint film shall not be less than 45μm, and the adhesion of the paint film shall not be less than level 2.
3.15 In compliance with the installation specified by the manufacturer , use and storage conditions, within 12 months from the date of purchase, if the product is damaged or cannot work properly due to poor manufacturing quality, the factory shall be responsible for repair, replacement and refund. 3.16 When the rice mill is shipped with an electric motor, the rotating part of the machine must be equipped with a safety guard. 2
Test method and acceptance rules
JB/T9792.2—1999
4.1 The factory idle running test time shall not be less than 30min, and shall meet the following requirements: a) The machine runs normally and smoothly, and there shall be no abnormal phenomenon; b) All connecting parts and fasteners shall not be loose. 4.2 Products produced in batches shall be sampled and inspected at least once a year, and performance tests shall be carried out in accordance with the provisions of JB/T9792.3. Its performance shall comply with the provisions of 3.2.
4.3 When the ordering unit samples the product quality, the number of samples and the qualified quality level shall be determined by negotiation between the ordering party and the supplier. 5.1 The label of the rice mill shall be made in accordance with the provisions of GB/T13306 and fixed in a conspicuous position. The label shall include the following contents: a) Product name and model; b) Matching power; c) Spindle speed; d) Pure working hour productivity; e) Machine quality; f) Factory number and date; g) Manufacturer name; h) Manufacturer address. 5.2 Product packaging shall be rainproof and shall comply with transportation requirements and relevant regulations, and shall ensure that the accompanying technical documents, spare parts, accessories and T. tools are not lost.
5.3 Random documents, spare parts and accessories
a) Product instruction manual;
b) Product inspection certificate;
c) Packing list;
d) Spare parts, accessories, tools (supplied according to the instruction manual)5.4 The product should be stored in a well-ventilated room with a flat floor, and should be protected from moisture and corrosion. Grain
Source grain bulk density
JB/T9792.2—1999
Appendix A
(Standard Appendix)
Rice yield conversion coefficient table
Source grain bulk density
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