HG/T 2648-1994 Technical Specifications for Conveyor Belt Roller Friction Tester HG/T2648-1994 Standard Download Decompression Password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T2648-94
Technical Conditions for Friction Tester for Conveyor Belt Roller Issued on 1994-10-26
Ministry of Chemical Industry of the People's Republic of China
Implementation on 1995-03-01
Chemical Industry Standard of the People's Republic of ChinawwW.bzxz.Net
Technical Conditions for Friction Tester for Conveyor Belt Roller Subject Content and Applicable Scope
HG/T264894
This standard specifies the basic structure, technical requirements, inspection methods, inspection rules and marking, packaging, transportation, Storage, etc. This standard applies to the conveyor belt roller friction tester that determines the flame retardancy of the conveyor belt by rubbing the conveyor belt sample on the roller. 2 Reference standards
GB2611 General technical conditions for testing machines
HG/T2382, General technical conditions for rubber testing instruments and equipment 3 Structure
Conveyor belt roller friction tester is shown in Figure 1. The tester includes the following main parts, 3.1 Roller
Approved by the Ministry of Chemical Industry of the People's Republic of China on October 26, 1994 and implemented on March 1, 1995
HG/T2648--94
The dimensions of the steel roller are shown in Figure 2. The roller is installed on the horizontal axis of the testing machine and can rotate in the direction indicated by the arrow in Figure 1 at a specified speed. During the test, the sample wraps around the roller at a 180-degree wrap angle and rubs against the roller. 2
Figure 1 Rolling rod friction tester
1-rolling rod; 2-test partner; 3-clamp; 4-clamp adjustment device 5-tensioning system; 6-air duct; 7-electrical induction device 3.2
Temperature measurement system
HG/T2648-94
The temperature measurement system consists of a thermocouple, an electric induction device and a temperature recorder. The installation method of the thermocouple is shown in Figure 2. 015
Thermocouple room magnification
355±1
Figure 3 Lever of the tensioning system
1-Ear hole (used to connect with the tensioning chain); 2-Fulcrum; 3-Fixed pin; 4-Slider 3.3 Tensioning system
The tensioning system is used to apply tension to the specimen during the test. It mainly includes a lever with a slider and two clamps. By adjusting the position of the slider on the lever, the tensioning system can apply the tension specified in Article 4.3 to the specimen. The lever of the tensioning system is shown in Figure 3. If the specified tension can be applied to the specimen in the same way as HG/T2648-94
, other force-applying methods are allowed. 3.4 Blowing system
The blowing system consists of an air source and a blowing pipe. The blowing pipe is installed on the side of the roller that is not covered by the sample. Its axis is at the same height, parallel and 600mm apart from the roller axis. A row of evenly distributed blowing holes is drilled on the side of the blowing pipe facing the roller. The inner diameter of the blowing pipe and the diameter of the blowing holes depend on the wind source.
3.5 Exhaust system
The exhaust system consists of a fan and a wind hood
4 Technical requirements
4.1 The normal working conditions of the testing machine shall comply with the provisions of HG/T2382. 4.2 The outer diameter of the roller is 210±imm, the cylindricality error is not more than 1mm, the roller wall thickness is 6.50t023mm, and the load speed of the roller is 200±5r/min.
4.3 The measuring device of the roller temperature includes a mineral insulation layer and a stainless steel sleeve. The outer diameter of the nickel-chromium-aluminum armored thermocouple is 2mm, and it is fixed to the thermocouple chamber on the drum shell with a ferrule thread. It is installed in the middle of the length of the drum, and the distance between its working end and the drum surface is not more than 0.5mm.
Note: 3 thermocouples can be installed to prevent accidental accidents. 4.4 The tensile force required for the sample is:
343±3.5N686±7N1029±10.5N1372±14N1715±I7N. When the test machine is equipped with a sample, the wind speed measured at 200mm from the drum surface is 2.0±0.1m/s.- 4.5
The exhaust wind speed measured in the wind hood shall not be greater than 0.5m/s4.6
The basic requirements, appearance quality and electrical performance of the testing machine shall comply with the provisions of GB2611, and the transportation bumpy performance of the testing machine shall comply with the provisions of HG/T23824.8
5 Test method
Test conditions
The testing machine shall be tested under the conditions specified in Article 4.1 of this standard5.2
Test tools and instruments
Vernier caliper
b.Digital indicator
c.Tachometer
d. Force measuring device
e. Anemometer
f. First-class thermocouple
Minimum graduation value 0.02mm;
Minimum graduation value 0.01mm;
Measurement accuracy ±lr/min;
Measurement accuracy 0.5%;
Measurement accuracy 0.05m/s;
Allowable deviation is ±1.5℃
5.3 The outer diameter and wall thickness of the roller are checked with a vernier caliper. The average value of the three points measured shall comply with the provisions of Article 4.2. The cylindrical errors of the three sections measured at both ends and the middle of the roller with a dial indicator shall comply with the provisions of Article 4.2. The speed of the roller can be measured with a tachometer. The minimum load is measured 3 times and the maximum load is measured 3 times. The average value shall comply with the provisions of Article 4.2. 5.4 The test of the accuracy of thermocouple measurement shall refer to the method specified in JG351-84 "Verification Procedure for Working Nickel-Chromium-Nickel-Silicon, Nickel-Chromium-Copper Thermocouples". The test results shall comply with the provisions of Article 4.3. 5.5 The tensile force applied to the sample can be tested with a force measuring device. First, the force sensor of the force measuring device is installed on the testing machine as shown in Figure 4. 2
HG/T2648--94
Figure 4 Tension measurement method
1Simplified: 2- Sample: 3-Clamp: 4-Force measuring device: 5-Chain or wire rope: 6-Lever: 7-Slider. Clamp the sample with the clamp, adjust the basic level of the force lever, make the slider in each position corresponding to different tensions, and display the tension measured by the slider at each position. The measurement results shall comply with the provisions of Article 4.4. 5.6 The wind speed at 200mm from the drum surface can be measured with an anemometer: The measurement results shall comply with the provisions of Article 4.5. The wind speed in the wind hood can be measured with an anemometer. The measurement results shall comply with the provisions of Article 4.6. 5.7
Basic requirements for testing machines. The appearance quality and electrical performance shall be carried out in accordance with the relevant provisions of GB2611, and the requirements shall comply with the provisions of Article 4.7. The transportation sieve performance test of the testing machine shall be carried out in accordance with the relevant provisions of HG/T2382, and its performance shall comply with the provisions of Article 4.8. 6 Inspection rules
6.1 Each test machine must be inspected and qualified by the quality inspection department of the manufacturer, and can only leave the factory with a product certificate. 6.2 Product inspection is divided into factory inspection and type inspection. Factory inspection is carried out one by one according to Articles 4.2 to 4.6, and type inspection is carried out by sampling according to Articles 4.2 to 4.8.
6.3. The test machine should be type inspected under the relevant circumstances specified in HG/T2382. 6.4 The sampling and judgment rules of type inspection should be carried out in accordance with the relevant provisions of HG/T2382. 7 Marking, packaging, transportation and storage
The marking, packaging, transportation and storage of the test machine shall comply with the relevant provisions of HG/T2382. Machine documents
The types and storage of the documents accompanying the test machine shall comply with the relevant provisions of HG/T2382. Additional notes:
This standard is proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the Rubber Testing Instruments and Equipment Standardization Technical Committee of the Ministry of Chemical Industry. This standard was drafted by Qingdao Rubber Industry Research Institute. The main drafters of this standard are Han Deshen, Qi Bin, Yao Jianli, People's Republic of China
Chemical Industry Standard
Technical Conditions for Conveyor Belt Roller Friction Tester HG/T2648-94
China National Chemical Equipment Corporation
Postal Code
100011
Printed by Beijing Institute of Chemical Technology Printing Factory
Copyright reserved
880×1230
First edition in June 1995
No reproduction
9,000 words
First printing in June 1995
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.