JB/T 51213-1999 Feed mill product quality classification JB/T51213-1999 standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T51213-1999
Product Quality Classification of Feed Grinders
(Internal Use)
Published on 1999-12-30
National Bureau of Machinery Industry
Implemented on 2000-06-01
JB/T51213—1999
This standard is a revision of JB/T51213.1~51213.3—94 "Product Quality Classification of Feed Grinders". During the revision, editorial changes were made to the original standard, and the main technical content remained unchanged. This standard replaces JB/T51213.1~51213.3—94 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Agricultural Machinery Standardization. The responsible drafting unit of this standard is the Animal Husbandry Machinery Research Institute of the Chinese Academy of Agricultural Mechanization Sciences. The main drafters of this standard are Huang Xiguo, Chen Boshuang, Jiang Jianqun, Wang Weilan and Wu Jianmin. 1 Scope
Machinery Industry Standard of the People's Republic of China
Quality Grading of Feed Grinders
(Internal Use)
JB/T51213—1999
Replaces JB/T51213.1~512133—94
This standard specifies the quality grade indicators, test methods and inspection rules for feed grinders. This standard applies to the quality grading of feed grinders. 2 Referenced 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/T5667—1985
GB/T5917—1986
GB/T6971—1986
GB 10395.1—1989
JB/T5673—1991
JB/T9822.1—1999
3 Quality indicators
Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) Agricultural machinery production test methods
Method for determining the particle size of compound feed crushing
Test methods for feed crushers
Safety technical requirements for agricultural and forestry tractors and machinery Part 1: General General technical conditions for painting agricultural and forestry tractors and machinery Technical conditions for hammer-type feed crushers
Feed crusher products should be manufactured according to drawings and technical documents approved through prescribed procedures and comply with the provisions of relevant standards. The quality of feed crusher products is divided into qualified products, first-class products and superior products according to their technical level and quality level. 3.3 Quality Grade Index
3.3.1 When the feed crusher is crushing the second-grade corn for feed with a moisture content of 12%~14% and the straw with a moisture content of 8%14%, the performance index shall meet the requirements of Table 1.
Table 1 Quality Grading Index
Power Consumption per Ton of Feed13
kw·ht
Feed Temperature Rise
Bearing Temperature Rise
Straw
Approved by the State Machinery Industry Bureau on December 30, 1999I
Qualified Products
Grading Index
Superior Products
Implemented on June 1, 2000||tt ||Dust concentration
Effectiveness (reliability in use)
Average working time before first failure
Hammer (flat teeth, hammer) life
Sieve life
Rotor balance
Paint film adhesion
Appearance quality of paint
Safety devices and markings
JB/T51213-1999
Table 1 (Complete )
Qualified products
Grading index
Superior products
All crushed materials pass the standard round hole powder test sieve corresponding to the sieve aperture ≥94
≥400
Check 3 points and all reach
≥450
≥100
Check 3 points and 2 points reach
I level,
1 point reachesⅡ Grade
≥110
Check 3 points, all meet 1
Bright color, smooth,
No leaking bottom, spot,
flow mark,
bubble, wrinkle
Application of one-way rotation The arrow indicates the direction of the main shaft, and the complete set should be sold with belts and pulleys.
When testing various types of crushers, the following sieve apertures are used (see Table 2). Table 2
2 Safety requirements
Crushing grains
Crushing grains and straw
Crushing straw
Feed crushers should be able to reliably cut off the transmission of power. Sieve aperture
Each exposed rotating part should have a reliable safety protection device, such as a safety protection cover with pulleys. The protection methods of the motor shaft and the pulley shaft and the pulley shall comply with the relevant provisions of Chapter 6 of GB10395.1-1989. 4 Test methods
4.1 Sampling methods
4.1.1 According to GB/T2828, samples shall be taken at any time from the products produced by the enterprise in the past 6 months. The sample size is 2 units. When sampling in the enterprise, the inventory of complete machines shall not be less than 25 units; this limit does not apply when sampling in the market. Performance test
4.2.1 Test methods
4.2.1.1 The instruments, meters and measuring tools used in the test 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 indeed necessary, the inspected items must be re-inspected. 2 Product test and determination shall be carried out in accordance with the relevant provisions of GB/T6971. See Table 3 for specific methods. 4.2.1.2
Test and inspection items
Power consumption per ton of material
Feed temperature rise
Bearing temperature rise
Dust concentration
Service reliability
JB/T51213-1999
Test method
According to 15.1 in GBT69711986
According to GBT6971198 6 in 15.5
According to GBT69711986 in 15.4
According to GBT69711986 in 15.6
According to GBT69711986 in 15.7
Refer to GB/T59171986
According to GBT69711986 in 24.2
Average working time before first failure
Hammer (flat teeth, hammer ）Life
Sieve life
Rotor balance
Paint film adhesion
Paint film appearance quality
Safety devices and markings
According to 2.1.3 of GBT5667-1985
According to 23.1.2 of GBT6971-1986
According to 23.1.2 of GBT6971-1986
According to JB/T98 22.1
According to JB/T5673—1991
According to JBT5673—1991
According to Table 1 No. 14
3 Reliability assessment: The average operating time before the first failure should generally be undertaken by the quality inspection department recognized by the state, or it can be entrusted to the production enterprise for self-test. Each item shall not be less than 2 units, and the test results must be reported to the quality inspection department. It will be effective only after being approved and stamped by the quality inspection department.
4.2.1.4 During the test, the working conditions of each prototype shall be recorded in detail according to the shift. 5 All failures occurring during the test shall be recorded in detail, including the time, situation, cause analysis, and repair work time. Take photos when necessary.
5 Inspection rules
1 Inspection level
Use special inspection level S-1.
Classification of non-conforming items
Any item that is lower than the qualified product requirements specified in Chapter 3 is considered non-conforming. It is divided into three categories: A, B, and C according to the degree of impact on the use of the product, see Table 4.
5.3 Determination principles
Evaluate each item one by one and determine by category. The lowest grade that can be achieved in each category is determined as the quality grade of the batch of products. See Table 5 for the determination array.
Unqualified classificationWww.bzxZ.net
Qualified products
First-class products
Superior products
Number of items
Number of samples n
Inspection level
Sample code
JB/T51213-1999
Power consumption per ton of material
Rotor balance
Safety devices and markings
Effectiveness (reliability in use)
Bearing temperature rise
Dust concentration
Hammer life
Sieve life
Unqualified items
Average working time before first failure
Feed temperature rise
Paint film adhesion
Paint appearance quality
5 Sampling determination plan|| tt||Mechanical Industry Standard
Feed Crusher Product Quality Classification
(Internal Use)
JB/T51213-1999
Published and Distributed 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
Sheet 1/2
Word Count 10000
First Edition in April 200
First Printing in April 2000
Print Quantity 1-500 Pricing 1000 Yuan
No. 99-1666
Mechanical Industry Standard Service Network: http/hvwwJB.ac.cn666
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