HG/T 3646-1999 General purpose tear-resistant steel cord conveyor belt
Some standard content:
Record number: 4065-1999
HG/T 3646-1999
Appendix A and Appendix B of this standard are both informative appendices. Introduction
This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Ministry of Chemical Industry's adhesive tape standardization technical centralized unit. The drafting unit of this standard: Fuxin Rubber Co., Ltd. The main drafters of this standard: Jin Guiju, Han Deshen, Xing Lei, Qi Zongtong, Song Jingfang. 436
1 Scope
Chemical Industry Standard of the People's Republic of China
Anti-tear steel cord conveyor belt for general useHG/T 36461999
This standard specifies the product classification, technical requirements, test methods and inspection rules of anti-tear steel cord conveyor belt for general use (hereinafter referred to as "anti-tear belt" or "belt"). This standard applies to tear-resistant belts with working temperatures of -30 to +50°C. This standard does not apply to conveyor belts for special purposes such as oil resistance, heat resistance, acid and alkali resistance, flame retardancy, and food conveying. 2 Reference 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/T 528—1992 Determination of tensile properties of vulcanized rubber and thermoplastic rubber GB/T2941--1991 Standard temperature, humidity and time for environmental conditioning and testing of rubber specimens (eqvISO471:1983eqvISO 1826:1981)
GB/T35121983（1989）Test method for hot air aging of rubber (neqISO188：1976) GB/T4490--1994 Conveyor belt dimensions (eqvISO251:1987ISO583:1990) GB/T 5752—-1992
Conveyor belt marking (neqISO4331991)
GB/T 57531994
GB/T 5754—-1986
GB/T 5755—1986
GB/T 6759---1986
Steel cord conveyor belts-Determination of cover thickness (eqvISO7590:1990)Determination of longitudinal tensile strength of steel cord conveyor belts (neqISO7622/2:1984)Steel cord conveyor belts-Determination of bond strength of steel cords (neqISO7623:1984)Method for determination of interlayer bond strength of conveyor beltsTest method for troughing of conveyor belts
GB/T 7983—1987
GB/T 9770—-1988
GB/T 9867—1988
HG/T 2410--1992
HG/T 3056--1986
3 Definitions
Steel cord conveyor belts
Determination of the wear resistance of vulcanized rubber (rotating roller simple abrasion machine method) (neqISO4649:1985) Conveyor belt sampling
General rules for storage and handling of conveyor belts (egISO5285:1978) The following definitions are used in this standard.
3.1 Breaker
A transverse reinforcement in tear-proof belts, generally composed of fabric. Embedded in the upper cover layer and (or) lower cover layer. 3.2 Transverse weft
A transverse reinforcement in tear-proof belts, generally composed of transverse ropes, embedded above and (or) below the longitudinal steel wire ropes, or woven together with the longitudinal steel wire ropes to form a net.
Approved by the State Administration of Petroleum and Chemical Industry on August 12, 1999, and implemented on October 1, 2000
4 Classification
4.1 Structural form
HG/T 3646-1999
The structure of tear-resistant tape is divided into two types: adding a buffer layer as a transverse reinforcement and adding a transverse member as a transverse reinforcement. 4.1.1 The buffer layer tear-resistant tape uses the buffer layer (mainly the cord) as the transverse reinforcement. 4.1.2 The transverse member tear-resistant tape uses the transverse rope as the transverse reinforcement. 4.2 Product specifications
The product specifications of tear-resistant tape are classified according to its longitudinal tensile strength, width, cover layer performance and tear-resistant performance. 4.2.1 Strength specifications are indicated by the letter "\St" and the nominal value of longitudinal tensile strength (N/mm). The series values are shown in Table 1. Table 1
St2000
St3500
St2250
St4000
The width specification series of anti-tear tape is shown in Table 2.500
St1000
St2500
St4500
St1250
St2800
St5000
4.2.3 The number of steel wire ropes corresponding to various strength specifications and width specifications shall comply with the provisions of GB/T9770.4. 2. 4 The covering layer performance of the tear-resistant belt is divided into three types: scratch-resistant type (H), wear-resistant type (D) and general type (L). 4.2.5 The tear-resistant performance is divided into two types: type A and type B. 4.3 Product marking
St1600
St3150wwW.bzxz.Net
St5400
The buffer layer is indicated by the letter S (steel) or T (chemical fiber) after the thickness of the upper covering layer or the thickness of the lower covering layer according to the specific situation. The transverse member is indicated by the letter S (steel) or T (chemical fiber) after the "St\", and the A or B in the lower right corner indicates the tear-resistant performance type. Marking example:
Tear-resistant steel cord conveyor belt: 1200St1600/8.0 TA +6.0 H
Type of performance of the covering layer
Thickness of the lower covering layer
Buffer layer in the upper covering layer
Thickness of the upper covering layer
Strength specification
Width specification
Tear-resistant steel cord conveyor belt, 1200StSA/SA1600/8.0+6.0D has transverse members on both sides of the core layer
5 Requirements
5.1 Structure and size of tear-resistant belt
The structure and size of the tear-resistant belt are shown in Figure 1, Figure 2, Figure 3 and Table 1, Table 2. 438
HG/T3646—1 999
b—width of the belt; b,—distance between the longitudinal ropes at the two ends; b2—width of the edge glue, bs—distance between the transverse reinforcement and the belt edge; d—diameter of the longitudinal rope e—eccentricity of the longitudinal rope in the thickness direction, f—reference line for eccentricity determination: p—distance between the longitudinal rope Figure 1 Structure and size of tear-proof belt
Buffer layer
——Belt thickness—Thickness of the overlying blue layer 2—Thickness of the underlying benefit layer: t3-Distance from the edge of the punching layer to the longitudinal steel wire rope s—Thickness of the belt core layer (ts=d) Figure 2 Sectional structure of belt with buffer layer
Transverse member
t4 --Height of the transverse member to the longitudinal steel wire rope st5 —Thickness of the belt core layer Figure 3 Sectional structure of belt with transverse member
5.2 Configuration and joints of longitudinal steel wire ropes
The configuration and joints of longitudinal steel wire ropes shall comply with the provisions of GB/T9770. 5.3 Transverse reinforcement configuration and size
5.3.1 Buffer layer
5.3.1.1 The distance from the buffer layer to the longitudinal steel wire rope should be 1~2mm, and the distance from the buffer layer to the belt edge should be 10~50mm. 5.3.1.2 The maximum nominal diameter of the buffer layer cord rope should be 2.5mm, and the ratio of its center distance to diameter should be 2~6. 5.3.2 Transverse member
HG/T3646—1999
5.3.2.1 The distance from the transverse member to the longitudinal steel wire rope should not be greater than 1mm, and the distance to the belt edge should be 5~25mm. 5.3.2.2 When the transverse member is a steel wire rope, its maximum nominal diameter is 2.5mm, its center distance should be 8120mm, and left-twisted and right-twisted steel wire ropes are arranged alternately.
5.4 Dimensional deviation
5.4.1 The length and width deviation of the belt shall comply with the requirements of GB/T4490; the deviation of the center distance and the upper and lower eccentricity of the wire rope shall comply with the requirements of GB/T 9770.
5.4.2 The thickness deviation of the belt only stipulates the lower limit: the nominal thickness is -1.0mm for those below 20mm, and 1.5mm for those exceeding 20mm. The maximum difference in belt thickness (i.e. the difference between the maximum thickness and the minimum thickness) shall not exceed 10% of the average thickness. Note: The nominal thickness is the sum of the thickness of the upper cover layer, the thickness of the lower cover layer and the thickness of the belt core layer. 5.5 Covering layer properties
The physical properties of the covering layer shall comply with the provisions of Table 3. Table 3
Tensile strength/MPa
Elongation at break/%
Aging test (70℃, 7d)
Change rate of tensile strength/%
Change rate of elongation at break/%
Abrasion loss/mm2
5.6 Interlayer bonding strength
Not less than
Not less than
Not greater than
The bonding strength between the transverse reinforcement and the adjacent rubber layer shall not be less than 10 N/mm. D
Note: If the transverse member is woven together with the longitudinal steel wire rope, the bonding strength test between the two shall not be carried out. 5.7 Tear resistance
The tear resistance test items include cracking resistance and puncture impact strength, and its performance shall comply with the provisions of Table 4. Table 4
Cracking resistance/kN
Breakdown impact strength/(N·m）
5.8 Grooving
Not less than
Not less than
Grooving should comply with the provisions of Table 5. The data in the table are the minimum values of the grooving index when three equal-length rollers are used. Table 5
Side roller inclination
Grooving index (F/L)
HG/T 3646--1999
5.9Tensile strength, bonding strength and bonding strength after aging of steel wire ropes The tensile strength, bonding strength and bonding strength after aging of steel wire ropes shall comply with the provisions of GB/T9770. 5.10 Appearance quality
The appearance quality of the belt shall comply with the provisions of Appendix A of GB/T9770. 6 Test methods
6.1 Measurement of belt length and width
Perform according to GB/T4490.
6.2 Test of tensile properties of cover layer
Perform according to GB/T528.
Note: The sample size is cut by dumbbell cutter of type 2 (narrow parallel part width 4.0mm±0.1mm). 6.3 Test of wear resistance of cover layer
Perform according to GB/T9867.
6.4 Test of aging resistance of cover layer
Perform according to GB/T 3512.
6.5 Test of bonding strength between transverse reinforcement and adjacent rubber layer
Perform according to GB/T6759.
6.6 Test of longitudinal tensile strength of steel wire rope
Perform according to GB/T5754.
6.7 The groove test of the belt
shall be carried out in accordance with GB/T7983.
6.8 The bond strength test of the steel wire rope
shall be carried out in accordance with GB/T5755.
6.9 The measurement of the maximum difference of the belt thickness and the thickness of the cover layer shall be carried out in accordance with GB/T5753.
6. 10 The determination of the distance between the steel wire ropes and the upper and lower eccentricity values shall be carried out in accordance with Appendix B and Appendix C of GB/T 9770. 6.11 The impact strength test of the belt
shall be carried out in accordance with Appendix A of this standard.
6.12 The cracking resistance test of the belt
shall be carried out in accordance with Appendix B of this standard.
7 Inspection rules
7.1 Inspect the appearance quality, length, width, thickness and edge glue width of each belt. 7.2 The sampling of the belt shall be carried out in accordance with HG/T 2410. 7.3 The number of factory inspection batches shall be implemented in accordance with HG/T2410. During the factory inspection, the physical properties of the covering layer (except for the hot air aging test), the center distance and upper and lower eccentricity of the wire rope, and the tensile strength, bonding strength and interlayer bonding strength of the wire rope shall be tested. 7.4 The type inspection shall be carried out once a year, and all technical requirements specified in this standard shall be inspected. 7.5 If one of the test results does not meet the standard, double samples shall be taken from the same batch of tapes, and the unqualified items shall be retested. If one test result still does not meet the standard after the retest, the batch of products shall be judged to be unqualified. 8 Marking, packaging, transportation and storage
8.1 The marking of the tape shall be implemented in accordance with GB/T5752.
HG/T3646-1999
8.2 The tape shall be wound on the core shaft and tied firmly with a covering. The product name, mark, specification, tape length, production serial number and manufacturer name (or registered trademark) shall be marked on the packaging.
8.3 The product is accompanied by a quality inspection certificate when it leaves the factory. 8.4 The transportation and storage of the belt shall be carried out in accordance with HG/T3056. 442
A1 Scope
HG/T3646—1999
Appendix A
(Suggestive Appendix)
Conveyor belt impact strength test method
This appendix specifies the test method for determining the impact strength of tear-resistant belts. A2
Method Summary
Subject the tensioned belt sample to the impact generated by a falling hammer with different kinetic energy. Measure the energy required to destroy or puncture the belt core. This is the impact strength of the belt.
A3 Apparatus
A3.1 The test apparatus is an impact strength tester. The testing machine includes a hydraulic device for providing clamping force and tensioning force, a measuring device for impact force and tensioning force and a device for recording their changing curves, a drop hammer with a punch and a certain mass, a drop hammer fixing and releasing device, and a drop hammer height measuring device.
Spherical surface R12.5
Grade directional example silk marriage
Transverse ketone silk absolute
Figure A1 Schematic diagram of the test device
A3.2 The effective test length after the sample is clamped is 400mm (see Figure A1). Figure A2 Punch
A3.3 The mass and height of the drop hammer should ensure that the impact energy is 100~3000N·m. There is no standardized regulation on the shape of the drop rust, and the mass of the drop hammer is calibrated by an authoritative organization. The punch installed on the drop hammer is shown in Figure A2. Its diameter is 36mm, the front end is a 60° cone, and the front end of the cone is a spherical surface of R12.5mm.
A force sensor with a sufficiently high response frequency is installed between the drop weight and the punch to measure the impact force (i.e. the reaction force on the punch) and the size and change of the sample tension. A3.4 The recording device (storage-type mobile recorder or spot-type continuous line recorder) should be able to record the reaction force and tension changes measured by the force measuring device when the sample is impacted (sometimes penetrated). 443
A4 Specimen
HG/T3646-1999
Specimen size: 700 mm long and 400 mm wide. Number of specimens: 2. A5 Procedure
A5.1 Preparation
Clamp the specimen in the clamp with a length of 400 mm between the two clamps. Tension the specimen with a force F equivalent to 10% of the tensile strength of the belt.
Determine the impact point and adjust the specimen to ensure that the drop hammer punch falls exactly on the transverse reinforcement during the test and does not fall on the longitudinal wire rope.
A5.2 Test procedure
A5.2.1 Fix the drop hammer at an appropriate height so that the product of the height and the mass of the drop hammer (i.e., the impact energy) is equal to a certain value. The impact energy value (N·m) of the first impact is equal to 1/2 of the nominal tensile strength value (N/mm) of the tested belt. A5.2.2 Release the drop hammer to impact the specimen, measure and record the impact force and specimen tension. A5.2.3 Increase the impact energy by 20% each time (the mass of the drop hammer remains unchanged and the height is increased: or the height remains unchanged and the mass of the drop hammer is increased), and impact is repeated until the belt core is first damaged or punctured. Whether to use the first damage or puncture as the termination indicator shall be agreed upon by the relevant parties. The impact strength is calculated based on the falling height and mass of the drop hammer when the belt core is punctured or damaged, and the result is corrected to 0.1N·m. E 9.81 XWXH
W—mass of falling hammer, kg;
H—falling height, kgm.
A6 Explanation of results
It can be determined by observation whether the belt core is damaged or punctured on the specimen. The change in the reaction force recorded by the recording device during the elastic impact is shown in Figure A3. When there is no visible damage on the belt but the belt core is damaged, this can be confirmed by the severe discontinuity and sharp drop in the force-time curve (see Figures A4 and A5). Grain
Figure A3 Changes in force during elastic impact
A7 Test report
The test report should include the following:
HG/T 3646-1999
Figure A4 Changes in force during impact when the belt core is damagedFigure A5 Changes in force during impact when the belt core is punctureda) Product name, specification, manufacturer name, b) Sample size;
c) Tensioning force,
d) Drop weight mass,
e) Impact strength,
First damage impact strength;
Puncture impact strength;
f) Test date;
g) Tester,
B1 Scope
HG/T3646—1999
Appendix B
(Indicative Appendix)
Test method for crack resistance of conveyor belts
This appendix specifies the test method for crack resistance of tear-resistant belts. B2 Method Summary
The specimen is cut with a standard knife. The average force required to cut the sample is the cracking resistance. B3 Sample
B3.1 Cut three samples at a normal position not less than 150mm from the edge of the belt. The sample size is 700mm long and 400mm wide. B3.2 Cut a prefabricated opening of about 150mm long in the center of the end of the sample along the longitudinal wire rope direction (see Figure B1). 400
Figure B1 Schematic diagram of sample cutting
B4 Device
The test device is a cracking resistance tester, which is equipped with a standard tool. The tool shape is divided into type A and type B, and its size is shown in Figure B2. =0. 5
Figure B2 Tool
For belts with transverse reinforcement made of metal materials, it is recommended to use type A tools, and for belts with transverse reinforcement made of chemical fiber materials, it is recommended to use type B tools.
B5 Procedure
B5.1 Fix the sample on the test motorized clamp. B5.2 Insert the cutter into the pre-cutting opening (with the blade facing the uncut part) and fix it on the cutter holder. B5.3 The cutter holder and the clamp move at a relative speed of (2.5±0.5) m/s to make the cutter cut the sample. 446
HG/T 3646—1999
B5.4 Record the tensile force (i.e. cracking resistance) curve applied by the testing machine to the sample during the test. B6 Explanation of results
B6.1 Remove the unstable area of the tearing start and end sections on the recorded curve. The average cracking resistance F (kN) of the normal section in the middle of the curve is calculated by the line drawing method, that is, draw a straight line parallel to the horizontal axis on the curve so that the area of the figure formed by the part of the normal section curve above the straight line and the straight line is equal to the area of the figure formed by the part below the straight line and the straight line. The force value represented by the straight line is the average cracking resistance. See Figure B3.
Starting section
Normal section
Sample cutting process
Figure B3 Determination of cracking resistance
Ending section
B6.2 Calculate the average value of the cracking resistance of the three samples and correct the value to 0.1kN as the test result. Test report
The test report should include the following contents:
a) product name, specification, manufacturer name; b) sample size;
c) tool model;
d) speed,
e) cracking resistance test results,
f) test date,
g) tester.
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