JB/T 51210-1999 Tea Dryer Product Quality Classification JB/T51210-1999 Standard Download Decompression Password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T51210-1999
Grading of Tea Dryer Product Quality
(Internal Use)
Published on 1999-12-30
National Machinery Industry Bureau
Implementation on 2000-06-01
JB/T51210—1999
This standard is a revision of JB/T51210.1~51210.3-94 "Grading of Tea Dryer Product Quality". Compared with JB/T51210.1~51210.3-94, the main technical content of this standard has been changed as follows: Adjusted the indicators such as unit effective leaf area productivity and drying intensity: - Classified the reliability indicators:
- Adjusted the non-conforming classification and sampling judgment table. This standard replaces JB/T51210.1~51210.3-94 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: Anhui Agricultural Machinery Research Institute. The main drafter of this standard: Jiang Quanyao.
1 Scope
Machinery Industry Standards of the People's Republic of China
Quality Grading of Tea Dryer Products
(Internal Use)
JB/T512101999
Replaces JB/T51210.1~512103-94
This standard specifies the quality grade indicators, test methods and inspection rules of box chain drying plate tea dryer (hereinafter referred to as tea dryer) products.
This standard applies to the quality grading of flat tea dryer products. 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 are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2828—1987
JB/T5673—1991
JB/T66741993
JB/T6675—1993
3 Quality indicators
Manufacturing requirements
Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) General technical conditions for painting of agricultural and forestry tractors and machinery Technical conditions for tea dryers
Test methods for tea dryers
Tea dryer products are manufactured according to product drawings and technical documents approved by the prescribed procedures and comply with the provisions of JB/T6674. Product quality classification
According to the technical level and quality level of tea drying machine products, it is divided into qualified products, first-class products and superior products. 3.3 Machine performance
3.4 ​​Tea drying machine products are divided into four types according to the total effective leaf spreading area (㎡): <10, ≥10~16, >16-25, >25-50.
4 When the tea drying machine uses the third-grade fresh leaves as raw materials to make black broken tea or black and green tea, the moisture content of the fermented leaves or rolled leaves is 58%~62% and the moisture content of the raw tea is not more than 6%. The classification of the performance quality indicators of the whole machine shall comply with the provisions of Table 1. Approved by the State Bureau of Machinery Industry on December 30, 1999 and implemented on June 1, 2000
Tea-making performance
Unit effective leaf spreading area
Productivity
kg/(m·h)
Drying intensity
kg.water/(m2.h)
Heat consumption
Tea volume ratio at the bottom of drying chamber
Drying process time ratiobZxz.net
Noise dB(A)
JB/T51210-1999
Machine performance Quality index classification table
Quality classification index
Qualified products
≥62/5.6
≥7.4/6.7
≥62/5.6
≤119/132
≤13.5/15.1
≤16.6/185
Meet the requirements of tea making process
≥5.4/45
≥6.0/5.4
≥6.0/5.4
≥5.0/4.5
≥6.6/5.9
≥7.9/7.1
≥6.6/5.9
≤10.7/11.9
12.2/13.6
≤15.0/16.7
Premium product
≥7.1/6.4
≥8.57 .7
≥7.16.4
≤10.1/11.5
≤11.5/12.8
≤14.1 /15.7
The left and right of the slash are the index values ​​of drying red broken tea and red and green stripe tea respectively
drying board working
except the sound of hitting
1In the table, CH1/CH2CH3.CH4 respectively represent the products with the total effective leaf spreading area of ​​the drying board of <10, ≥10~16, 16~25, >25~50 (m)
2In the drying process time ratio of T/T, T is the longest drying time and T is the shortest drying time. Reliability
The effectiveness of tea drying machine products shall comply with the provisions of Table 2. The trouble-free working time of tea drying machine products shall comply with the provisions of Table 2. Table 2 Reliability Index Grading Table
Effectiveness
Working time before first failure
Assembly quality
Qualified products
≥150
Quality grading index
First-class products
≥200
1The assembly quality of tea dryer products shall comply with the relevant provisions of JB/T6674. 4.2.1
Superior products
≥250
2The welds of the left and right wall panels on the leaf conveyor and the left and right wall panels on the drying box of the tea dryer products shall be firm and reliable, and there shall be no defects such as leakage welding and cracks.
JB/T51210-1999
The tea dryer shall run smoothly after assembly, and the drying plate shall run reliably. 4.2.3
The assembly quality classification of tea drying machine products shall comply with the provisions of Table 3. Table 3 Assembly quality index classification table
Qualified products
Observation door and wall panel joint surface leakiness Bearing seat, adjustable seat and wall panel joint surface: upper leaf conveyor belt and wall joint surface; unreliability of bolt fastening of box wall panel segment joint surface Leakage
Related parts working
Temperature or temperature rise
Paint quality and appearance quality
Temperature rise of rolling bearing
Temperature rise of sliding bearing
Working temperature of reducer
Electric motor
Quality grading index
First-class product
≤10 in width direction
No looseness
No obvious leakage
Superior product
No leakage
Meet the requirements of motor products
The paint quality of the tea dryer surface shall meet the quality index of "ordinary weather-resistant layer" in JB/T5673. Decorative surface of tea dryer: The paint quality index classification of the front and left and right sides of the machine shall meet the requirements of Table 4. 4.3.2
The product appearance of the tea dryer should be neat and tidy, without rust and oil stains. The random technical documents and spare parts of the tea dryer should be complete, and the packaging mark content should be complete and accurate, with clear words. Table 4 Paint quality index classification table
Number of paint leakage defects
Number of paint peeling defects
Number of wrinkling and sagging defects
Paint film adhesion
Test method
Preparation before test
Qualified products
3 points not lower than Grade II
Quality classification index
No paint leakage on the paint surface
Number of defects not larger than 4cm≤2
Number of defects not larger than 16cm2≤2
2 points are not lower than Grade II,
Points reach Grade II
Preparation before test According to JB/ T6675-1993 Chapter 3. 5.2 Whole machine performance test
The whole machine performance test is carried out in accordance with the provisions of JB/T6675-1993 Chapter 4. 5.3 Reliability test
5.3.1 The reliability test is carried out in accordance with the provisions of JB/T6675-1993 Chapter 5. Superior product
3-point reaching grade
5.3.2 When testing the working time before the first failure, if ordinary triangular tape or other material transmission belt is used for stepless speed change, if it is damaged, it does not need to be treated as a whole machine failure, but it must comply with the current relevant standards and have a product certificate. 5.4 Assembly quality inspection
JB/T51210-1999
5.4.1 For bearing seats, adjustable seats and related joint surfaces fastened with bolts and nuts, use the corresponding fixed wrench to tighten the bolts and nuts. If they can be rotated less than or equal to 1/2 circle, the tightening requirements are met. 5.4.2 For joint surfaces fastened with more than three bolts and nuts, three bolts and nuts must meet the tightening requirements; for joint surfaces fastened with less than three bolts and nuts, all must meet the tightening requirements. 5.4.3 After the tea dryer has been running for 1 hour, use a semiconductor point thermometer or thermometer to measure the bearing temperature rise on the bearing shell close to the shaft neck, and measure its working temperature in the detector oil pool.
5.4.4 Detect oil leakage after the tea dryer has been running for 0.5 hours. 5.5 Appearance quality
5.5.1 The appearance quality and welding quality are checked by observation. 5.5.2 The quality of paint shall be tested in accordance with the provisions of JB/T5673. Three points shall be randomly inspected and the percentage of the peeling area to the specified area shall be calculated. 6 Inspection rules
6.1 Sampling method
6.1.1 The sampling method shall be in accordance with the provisions of GB/T2828. 6.1.2 Random sampling shall be adopted, and random sampling shall be conducted among the products produced in the factory within the past six months. When sampling in the factory, the inventory of complete machines shall be no less than 16 to 25 units; when sampling in the sales department, this limit may not apply. 6.1.3 The number of complete machine samples shall be 2 units.
6.2 Classification of unqualified items
6.2.1 Any item that does not meet the relevant requirements of the quality indicators in Chapter 3 shall be considered unqualified. 6.2.2 According to the impact of the inspected items on product quality, they are divided into Class A, Class B and Class C non-conformities. The non-conformity classification is shown in Table 5. 6.3 Judgment rules
Evaluate each item one by one, and determine the grade based on the lowest grade reached by each group in the non-conformity classification table. 6.3.1
See Table 6 for the sampling judgment table. In the table, AQL is the qualified quality level, Ac is the qualified judgment number, and Re is the unqualified judgment number. 6.3.2
Table 5 Unqualified classification of tea drying machine
Unqualified classification
Tea making performance
Tea output per effective leaf spreading area per hour
Drying intensity
Heat consumption
Effectiveness
Drying process time ratio
Tea accumulation at the bottom of drying chamber
Working temperature or temperature rise of relevant parts
Working time before first failure
Smooth operation and reliability
Unqualified classification
Sampling plan|| tt||Qualified products
First-class products
Superior products
Wrinkling, sagging
Paint film adhesion
Product appearance
JB/T51210-1999
Table 5 (end)
Bearing seat, adjustable seat and wall panel joint surface: upper blade conveyor belt and wall joint surface: Unreliability of bolt fastening of box wall panel segment joint surface
Completeness of random technical documents and spare parts: Completeness and accuracy of packaging mark content Table 6
Number of items||tt ||Inspection level
Sample code
Sample size
Tea dryer sampling judgment table
Note: When the sample size changes,
AQL remains unchanged, Ac, Re are selected according to Table 3 of GB/T2828
1987
Mechanical industry standard
Tea dryer product quality classification
(internal use)
JB/T51210-1999
Published by the Mechanical Science Research Institute
Machine Printed by China Academy of Mechanical Engineering
(No. 2, Shouti South Road, Beijing, Postal Code: 100044)*
Format: 880×12301/16 Printing Sheet: 1/2
2 Word Count: 12000
First Edition: April 2000
First Printing: April 2000
Print Quantity: 1-500
Price: RMB 1000
No.: 99-1663
Mechanical Industry Standard Service Network: http:/hvwwJB.ac.cn666
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.