Some standard content:
J78
JB
Machinery Industry Standard of the People's Republic of China
JB/T5280.2---91
Vacuum vibration flow dryer
General technical conditions
Released on 1991-01-01
Released by the Ministry of Mechanical and Electronics Industry of the People's Republic of China
Implemented on 1991-07-01
Machinery Industry Standards of the People's Republic of China||tt| |Vacuum vibration flow dryer
General technical conditions
1 Subject content and scope of application
JB/T 5280.2-91
This standard specifies the vacuum vibration flow dryer Technical requirements, test methods, inspection rules and marking, packaging, transportation, storage and other requirements.
This standard applies to horizontal vacuum vibration flow dryers (hereinafter referred to as dryers). 2 Reference standards
GB3768
GB191
JB8
SJ2573
JB/T 5280.1
3 Terminology
Noise source Simple method for measuring sound power level
Packaging, storage and transportation indication mark
Product label
General technical conditions for coating coating
Vacuum vibration flow dryer type and basic parameters Volumetric drying intensity (symbol Pv):
The weight of moisture removed by the dryer per unit time and unit real volume of the drying chamber for specific materials under given working conditions, unit is kg/h·m2||tt ||4 Technical Requirements
4.1 The dryer should comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.2 Requirements for environmental conditions
a. The ambient temperature is not higher than 40℃,
b. When the altitude of the use area is less than 1000m, the surface temperature rise of the motor is not higher than 65°C; when the altitude of the use area is between 1000~4000m, every 100m increase , the surface temperature rise of the motor should be reduced by 0.5°C. 4.3 Structural requirements
The dryer should have good thermal insulation measures. 4.4 Appearance quality
The appearance quality of the coating shall comply with the requirements for level 1 coating appearance quality in SJ2573 Article 1.3.1. 4.5·No-load technical performance
4.5.1 The amplitude should comply with the requirements in Table 1 of JB/T5280.1. 4.5.2 The vibration frequency deviation is ±0.3Hz. 4.5.3 When the dryer is located in a location where the altitude is lower than 1000m and the ambient temperature is no higher than 40°C, the temperature rise on the motor surface should not exceed 20°C after running for 2 hours without load. | |tt | When the amplitude is 2.8±0.5mm, the noise value during no-load operation should comply with the requirements in Table 1 of JB/T5280.1. 4.5.5 The ultimate pressure in the drying chamber should comply with the requirements in Table 1 of JB/T5280.1. 4.5.6. The air leakage rate of the drying room should comply with the requirements in Table 1 of JB/T5280.1. 4.6 Load technical performance
4.6.1 When drying performance testing is conducted with quartz sand with a particle size of 0.18~0.35mm and a moisture content of 9%~11%, the volumetric drying intensity of the dryer should comply with JB/T5280. 1 as specified in Table 1. 4.6.2 The dryer should be able to meet the drying requirements of other materials within the applicable scope. 4.7 Reliability
The working time of the dryer before the first overhaul should be no less than 10000h. 5 Test methods
5.1 The appearance quality of the coating shall be tested according to the provisions of Articles 2.4.2, 2.5 and 2.6 of SJ2573, and the results shall comply with the requirements of Article 4.4 of this standard. 5.2 The amplitude is measured at the top of the feeding port with a vibration measuring instrument with a measurement error of less than 10%. The result should meet the requirements of Article 4.5.1. 5.3 Vibration frequency: Use a speed meter with an accuracy of ±1min-1 to measure the motor spindle speed, and calculate the frequency difference according to the following formula. The result should meet the requirements of Article 4.5.2.
f nnobzxZ.net
60
where: f-
frequency difference, Hz;
n——measured value of motor revolution, min- ;
no——motor revolution calibration value, min-!. 5.4 The surface temperature rise of the motor is measured with a semiconductor thermometer with an allowable error of ±1°C. The result shall comply with the requirements of Article 4.5.3. 5.5 The noise shall be tested according to the estimation method specified in GB3768, and the results shall meet the requirements of Article 4.5.4. 5.6 The ultimate pressure in the drying chamber is measured with a single-tube mercury manometer with an accuracy of not less than ±5%. The results should meet the requirements of 4.5.5. 5.7 The air leakage rate of the drying room shall be tested in accordance with the provisions of Appendix A (Supplement) of this standard, and the results shall comply with the requirements of Article 4.5.6. 5.8 The volumetric drying strength shall be tested in accordance with the provisions of Appendix B (Supplement) of this standard, and the results shall comply with the requirements of Article 4.6.1. 5.9 The dryer shall meet the drying requirements of other materials within the applicable scope. On-site operation shall be carried out according to the process conditions and requirements of material drying operations in actual production, and the extent to which the dryer meets the user's requirements for the drying effect of the material shall be inspected. 5.10 The dryer reliability test shall be conducted by the manufacturer through the laboratory or at an experimental point established by the user, and a test report shall be submitted. The results shall comply with the requirements of Article 4.7.
6 Inspection Rules
6.1 The dryer must pass the inspection by the technical inspection department of the manufacturer and be accompanied by a product quality certificate before it can leave the factory. 6.2 Dryer inspection is divided into factory inspection and type inspection. 6.2.1 Factory inspection
6.2.1.1 Each dryer must undergo factory inspection, that is, a no-load operation test lasting not less than 2 hours, and 4.4, 4.5.1, 4.5.2, 4.5.4 Requirements for inspection. 6.2.1.2 If any of the inspection items of the company is unqualified, the product will be deemed unqualified. 6.2.2 Type inspection
6.2.2.1 Type inspection shall be carried out when the following conditions exist: shift. Trial new products;
b. When the product is produced again after 2 years of discontinuation,
c. During normal production, 100 units are produced (referring to the same specifications). 2
JB/T 5280.2-91
6.2.2.2 In addition to the contents of outbound inspection, the type inspection shall also be carried out according to the requirements of 4.5.3, 4.5.5, 4.5.6 and 4.6.1 test. 6.2.2.3 When the requirements of 4.6.1 cannot be inspected due to objective reasons, the inspection of 4.6.2 can be used instead. 6.2.2.4 One prototype for type inspection is randomly selected from the finished product warehouse of the manufacturer. When inspecting Article 4.6.2, materials and prototypes can be selected at any time through consultation with relevant personnel.
6.2.2.5 During the type inspection, if any item is unqualified according to the requirements of Articles 4.5.3~4.5.6, the sampling shall be doubled to re-inspect the item. If there is still one unqualified item, it shall not be accepted.
7 quality guarantee period
Under the condition that the user abides by the provisions of the dryer instruction manual, within 18 months from the date of shipment from the manufacturer, it does not work properly due to poor manufacturing quality. When the product is damaged, the manufacturer shall replace or repair it (except wearing parts) free of charge for the user. 8 Logo, packaging, transportation, storage
8.1 Logo
8.1.1 Product mark
Each product should have a product label fixed in a conspicuous place, and its type, size and technical requirements should comply with According to the provisions of JB8, the content should include: manufacturer name;
a.
b.
product name;
e. Trademark;
d.
Product model:
&
f.
g.
Manufacturing date,
Product factory number or production batch number:
Main parameters of the product.
8.1.2 Packaging marks
When packaging products, there should be signs such as receipt and delivery, packaging, storage and transportation illustrations on the material surface. The packaging marks should comply with the regulations of GB6388 and GB191.
8.2 Packaging
8.2.1 The product should be packed in a box, the product should be fixed reliably in the box, and the packaging box should be rainproof. 8.2.2 The documents accompanying the product should include:
a. Product Certificate
b. Product instruction manual (including product installation diagram), c.
packing list (including random spare parts and tool list). 8.3 Transportation
When transporting, it should be covered with canopies or other rain-proof measures should be taken. 8.4 Storage
8.4.1 The storage area should be flat.
8.4.2 When stored in the open air, there should be a canopy or other rain-proof measures. 8.4.3. Maintenance should be performed once if the storage time exceeds 18 months. 3
A1 terminology, symbols
JB/T5280.2-91
Appendix A
Test method for air leakage rate of drying chamber of vacuum vibration flow dryer (supplementary part )
Drying room air leakage rate (symbol is Q):
Under the specified test conditions, the amount of gas leaked from the drying room per unit time, the unit is Pa·m\/s. A2 Test Instrument
A single-tube mercury manometer with an accuracy of not less than ±5% is used for pressure measurement. A3 Test conditions and test methods
When the drying chamber reaches the ultimate pressure, continue to pump for 1 hour, close each vacuum valve, and stop the vacuum pump. Wait until the pressure in the drying chamber rises to p: value (take p=11325Pa) , measure the pressure (p2) in the drying chamber over time t (take t=1800s). Calculation of the air leakage rate of A4 drying room
The air leakage rate of the drying room is calculated according to the formula (A1):
p2 )V
Q
t
In the formula: Q-drying room air leakage rate, Pa m\/s: Pl - the value to which the pressure in the drying room recorded initially rises after closing the valve, taken as 11425Pa, p2 - starting from p, elapsed time is the pressure in the drying chamber after t, Pa; t is the time for the pressure in the drying chamber to rise from p2 to p2, which is taken as 1800s; V - the full volume of the drying chamber, m\.
(Al)
B1 Test instruments
JB/T 5280.2—91
Appendix B
Test of volumetric drying strength of vacuum vibration flow dryer Method (supplement)
To measure the moisture content of materials, use a rapid moisture analyzer with an accuracy of not less than 0.05%. B2 test conditions
B2.1 The material selection is quartz sand with a particle size of 0.18~0.35mm and an original moisture content of 9%~11%. B2.2 The amount of material input for each test should be a lot based on the actual volume of the drying room. At 660kg/m2. B2.3 The working conditions of the dryer should meet the following requirements: a.
b.
c.
amplitude is 2.8±0.5mm;
steam pressure is 98kPa ;
The ultimate pressure in the drying chamber should not be higher than 1000Pa. B3 test method
When the dryer reaches the working conditions specified in Article B2.3, it will stop and discharge the material after 0.5h. The first sampling will be taken 1 minute after the discharge starts, and then every 2 minutes. , a total of three samples were taken, and the samples should be taken near the discharge port. Find the arithmetic mean of the moisture content of the three samples. | |tt | Strength, kg/h·m2, m—weight of input material, kg
Wl—moisture content of material before drying (wet basis), %, m(Wr - Wz)
tw(l -w2 )
W2——-The average moisture content of the material after drying (wet basis), %, the actual volume of the drying chamber of the dryer, m\;
t drying time, h.
Additional notes:
This standard is proposed and centralized by the National Technical Committee for Standardization of Vacuum Technology. This standard is drafted by Liaoning Tieling Drying Technology Research Institute. The main drafters of this standard are Zhao Jian, Xu Luji and Zhang Yujie. (B1)
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