JB/T 51215-1999 Feed processing unit product quality classification JB/T51215-1999 standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T51215-1999
【Product Quality Grading
Feed Processing Unit
(Internal Use)
Published on December 30, 1999
National Machinery Industry Bureau
Implementation on June 1, 2000
JB/T51215—1999
This standard is a revision of JB/T51215.1~51215.394 "Product Quality Grading of Feed Processing Unit".
Compared with JB/T51215.1~51215.394, the main technical content changes of this standard are as follows: some reliability indicators have been adjusted;
- Safety requirements have been clarified;
The classification of unqualified items has been adjusted. This standard replaces JB/T51215.1~51215.3-94 from the date of implementation. This standard is proposed and managed by the National Agricultural Machinery Standardization Technical Committee. The responsible drafting unit of this standard: Animal Husbandry Machinery Research Institute of China Academy of Agricultural Mechanization Sciences. The main drafters of this standard: Huang Xiguo, Wang Chunxi, Liu Chengjun, Chang Hezhang. 1 Scope
Machinery Industry Standard of the People's Republic of China
Feed processing unit, product quality classification
(Internal use)
JB/T51215-1999
Replaces JB/T512151~51215.3-94
This standard specifies the quality grade indicators, test methods and inspection rules of feed processing unit products. This standard is applicable to the detection and classification of product quality of feed processing units below 2500kg/h. 2 Reference Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2828—1987
GB/T3768——1996
GB/T5918—1997
GB/T6971——1986
JB/T5673—1991
3 Product quality grade
3.1 General requirements
Counting sampling procedure and sampling table for batch inspection (applicable to inspection of continuous batches by hand)Acoustic sound pressure method for determining sound power level of noise sourceSimple method of measuring surface above reflecting surface using envelopeDetermination of mixed uniformity of compound feed
Test method of feed grinder
General technical conditions for painting of agricultural and forestry tractors and implementsFeed processing units shall be manufactured according to product drawings and technical documents approved through prescribed procedures, and comply with the provisions of relevant standards.Grade categories
According to the technical level and quality level of feed processing unit products, they are divided into qualified products, first-class products and superior products. 3.3 Grading index
3.3.1 The performance of feed processing unit shall meet the requirements of Table 1. 3.3.2 The reliability of feed processing unit and the life of main wearing parts shall meet the requirements of Table 2. 3.3.3 The assembly, appearance packaging, marking and safety of feed processing unit shall meet the requirements of Table 3. Approved by the State Machinery Industry Bureau on December 30, 1999, implemented on June 1, 2000
Productivity kg/h
Electricity consumption per ton of material
Granular material
Powdered materialMixed uniformity of finished product
JB/T51215-1999
Qualified products
500-2500kg/h unit
50-300k g/h unit
50-2500kg/h unit
500-2500kg/h unitMoisture content of granular materialDust in operation area
Noise in operation area
Effectiveness
Average working time before first failure
Qualified products
Paint film adhesion
Marking and packaging
4Test methods||tt| |Check 3 points, all reach IⅡI level
Quality grading index
First-class products
Not lower than the design value
Quality grading index
Quality products
Quality grading index
Superior products
Superior products
Check 3 points, 2 points reach level 1,
1 point reaches level Ⅱ
Meet technical requirements
Meet technical requirements
Each exposed rotating part should have a protective device
Inspection items and indicators According to the product quality grade requirements in Chapter 3, check 3 points, all reach level
Meet technical requirements
Testing instruments, meters and measuring tools must have a valid inspection certificate issued by the metrology department and shall not be replaced at will during the inspection process. If replacement is really necessary, the inspected items must be re-inspected. 4.3 Test material requirements
Test with a ratio of 70% secondary corn (granules) and 30% auxiliary materials (powder). Material moisture content: ≤14%4.4 Test cycle
Productivity and power consumption are measured according to the cycle of continuous production of three batches of materials, for a total of 3 times. 4.5 Determination of productivity and power consumption per ton of material (fill in Tables 4 to 5)4.5.1 Granular materials are measured with a die hole diameter not greater than Φ4.5mm2
4.5.2 Productivity is calculated according to formula (1):
Where: E
Hourly productivity, kg/h;
9—Workload, kg:
T—Working time, h.
4.5.3 The power consumption per ton of material is calculated according to formula (2): JB/T51215-1999
Wherein: G-power consumption for producing 1 ton of material, kw·h/t; Gnz-power consumption for unit working time, kW·h. 4.6
The crusher is uniformly tested with a sieve with a sieve hole, and a sieve with a Φ2 sieve hole is used to check whether there is any leakage. If there is any leakage, the test data will be invalid and another measurement will be carried out.
4.7 The determination of the uniformity of the finished product mixture shall be carried out in accordance with the method specified in GB/T5918 (recorded in Table 6). 4.8 The determination of noise shall be carried out in accordance with GB/T3768 (recorded in Table 7). The determination of dust concentration shall be carried out in accordance with the provisions of 1.5.7 of GB/T6971-1986 (recorded in Table 8). 4.9
The average working time before the first failure and reliability test shall be carried out by the testing department or enterprise at the user or their respective test base. No less than 2 units shall be tested for each item, and the test report shall be approved by the appraisal or testing department. 4.11
The effectiveness shall be assessed throughout the entire process of production testing and calculated according to formula (3): t
×100%
Where: K-
-effectiveness:
T,—shift operation time, h;
T—shift troubleshooting time, h.
4.12 Paint film adhesion shall comply with the provisions of JB/T5673. (3)
Test location:
Test number
Finished product type
Test voltage
Measurement time
Finished product weight
Electricity meter reading
Electricity consumption per ton of material
Productivity
Recorder:
Measurement location:
Test number
Pellet material type
Test voltage
Measurement time
Measured finished product weight
Watt-hour meter
Pure power consumption
Power consumption per ton of material
Productivity
Finished product moisture content
Finished product temperature
Recorder:
kw·h/t
JB/T51215-1999
Table 4 Processing powder performance test record
Measurer:
Table 5 Processing granule performance test record
Test date:
Measurement date:
Measurer ：
Measurement location:
Carrier material name and batch:
Tracer name and proportion:
Optical density value
Recorder:
Average value
JB/T51215-1999
Table 6 Calculation table for determination of mixing uniformity
Sample standard deviation
Coefficient of variation
CV=S,
×100%
Measurer:
Determination date Period:
Mixing time:
Mixed uniformity
M=（1-CV）×100%
Machine name and model:
Test location:
Average sound pressure level dB（A）
Simplified layout of prototype measuring points
Measurer:
Measured A sound level
JB/T51215-1999
Table 7 Noise measurement record
Background noise level
dB (A)
Recorder:
Manufacturer:
Measurement date:
Correction value
Measurement A sound level
Raw material name:www.bzxz.net
Measurement location:
Measurement date:
Dust concentration
Measurer:
5 Inspection rules
5.1 Sampling method
Before sampling
JB/T51215 -1999
Table 8 Dust concentration measurement record
After sampling
5.1.1 Sampling method According to the provisions of GB/T2828, when sampling
When sampling
Atmospheric pressure
Manufacturing unit:
Raw material moisture content:
Recorder:
2 Randomly select from the products produced by the enterprise in the past 6 months, which can be selected from users, sales departments or factory finished product warehouses. 5.1.2
2 units are selected for the whole machine.
5.2 Evaluation principles
5.2.1 According to the degree of influence of the inspected items on the product, determine its unqualified classification as shown in Table 9. 5.2.2
Sampling judgment is shown in Table 10, AQL is the qualified quality level, Ac is the qualified judgment number, and Re is the unqualified judgment number. 3. Adopt item-by-item assessment and class-by-class determination, and determine the product quality grade by the lowest grade reached in the non-conforming classification. 5.2.3
Non-conforming classification
Sampling plan
Conforming products
First-class products
Superior products
Number of items
Inspection level
Sample code
Sample size
JB/T51215-1999
Non-conforming classification table
Number of non-conforming items||tt ||Mixing uniformity
Productivity
Electricity consumption per ton of material
Noise in operation area
Dust in operation area
Effectiveness
Average working time before first failure
Moisture content of granular material
Adhesion of paint film
Marking and installation
Sampling judgment table
Note: When the sample size changes, the AQL remains unchanged. Ac, Re are selected according to Table 3 of GBT282819871
Mechanical Industry Standard
Quality Classification of Feed Processing Units
(For internal use)
JB/T51215-1999
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Book size 880×12301/16 Printing sheet 3/4 Number of characters 18000First edition in April 2000
First printing in April 2000
Number of copies 1-500
Price 1500 yuan
No. 99-1578
Mechanical Industry Standard Service Network: http:/hvwwJB.ac.cn6661ss /
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