GB/T 3684-1983 Specification and test method for conductivity of conveyor belts GB/T3684-1983 standard download decompression password: www.bzxz.net

The National Standard of the People's Republic of China
Conveyor belts- Electrical conductivity--Specification and method of test
Conveyor belts- Electrical conductivity--Specification and method of test The standard specifies the maximum electrical conductivity of the conveyor belt and the corresponding measurement method. UDC 678.4.067
: 622.6-3
: 678.016
GB 3684-83
This standard is used to ensure that the conveyor belt has sufficient conductivity to conduct away the static charge formed during use. This standard is formulated with reference to ISO2841982 "Conveyor belt 1 Specification
Resistance value not more than 3×10\2 (300M2). 2 Test principle www.bzxz.net
Conductivity--Specification and test method". The current flows through the electrodes under the specified voltage between two areas of a certain shape and size on the surface of the conveyor belt sample, and the electrical value is measured.
3 Test apparatus
3.1 Insulating material plate, slightly larger sample.
3.2 Two brass electrodes: - one is cylindrical and flat polished. Each electrode is connected to an insulated wire. - one is annular, and its size and mass are shown in Figure 1. The bottom surface of each electrode should be polished. 3.3 Resistance tester, the range is 103~1012, the maximum error is ±5%, and the voltage range of the DC power supply is 50~1000V. Minimum mass 900 Figure
Minimum weight 15 Starting
Conductive liquid
Figure 2 Apply conductive liquid on the test piece
Figure 1 Electrode
, sample
4.1 Shape and size
Schematic diagram of electro-hydraulic parts
The sample is square, and the door has a full thickness of the conveyor belt, with a covering glue, a side length of not less than 300mm, and a thickness of the belt thickness.
Published by the National Bureau of Standards on May 14, 1983
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Implementation on March 1, 1984
4.2 Quantity
Two samples are used.
4.3 Preparation
GB 3684-88
4.3.1 Use a clean cloth soaked with activated white clay to clean both surfaces of the sample, then remove the powder on the sample, wipe it with a clean cloth moistened with distilled water, and finally wipe it dry with a clean cloth. 4.3.2 Apply polyethylene glycol conductive solution (or other conductive liquid with at least the same conductivity) to one surface of the sample. The two areas coated are the same size as the bottom surfaces of the two electrodes (as shown in Figure 2). Attention must be paid to ensuring the accuracy of the coating area, while the requirements for central symmetry are not strict. 4.3.3 The formula of the conductive solution is as follows:
Anhydrous polyethylene glycol (molecular weight 600): 800 parts by mass, water: 200 parts by mass;
Soft soap (in accordance with the Pharmacopoeia of the People's Republic of China): 1 part by mass. 4.4 Storage
The sample treated as above is stored at a temperature of 23±2℃ and a relative humidity of 60% to 70% for at least 2 hours. 5 Test conditions
The temperature and relative humidity conditions of the test are as specified in 4.4. 6 Test procedure
Place the prepared sample on the insulating material plate with the side coated with the conductive liquid facing up, wipe the bottom surface of the copper electrode clean, and place it on the corresponding part of the sample coated with the conductive liquid. Connect the outer electrode to the ground or to the low-voltage terminal of the measuring instrument, and the inner electrode to the high-voltage terminal of the instrument. After the voltage is passed for 1 minute, the resistance value of the sample is recorded. Then repeat the above test steps on the other side of the sample. Measures must be taken to flatten the bent and deformed sample. The voltage selected should be such that the power consumed by it in the sample is no more than 1W. Be careful not to make the sample surface wet due to breathing close to the sample, because any trace of moisture will make the result inaccurate. Since temperature and condensation have a great influence on the test results, when the test results are not in compliance with the specification, the test should be repeated under the test temperature and temperature upper limit conditions.
When the surface of the cover rubber is uneven, a metal foil can be used to improve the contact between the electrode and the sample. The size of the metal foil is the same as the bottom surface of the two electrodes. Place it on the conductive liquid and press it lightly with your fingers to make it close to the surface of the sample. Then place the brass electrode on the metal foil. 7 Test results
Record the resistance ohm value of the upper and lower surfaces of each sample separately. Take the arithmetic half mean of the two test disc values ​​of the same surface as the resistance of the surface.
8 Test report
The test report should include the following:
The type, specification, batch number and manufacturer name of the test conveyor belt, a.
Test room temperature and relative humidity,
Test results,
Abnormal phenomena during the test,
Test date:
Tester.
Standard control
Additional instructions:
GB 3684-83
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China and issued by Qingdao Rubber Industry Research Institute. This standard was drafted by Qingdao Rubber Industry Research Institute. The main drafter of this standard was Zhang Xiuxiang.
This standard was formulated in reference to ISO284-1982. Biaosou.com.b2s
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