GB/T 28267.1-2021 English PDFUS$339.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 28267.1-2021: Steel cord conveyor belts - Part 1: Design, dimensions and mechanical requirements for conveyor belts for general use Status: Valid GB/T 28267.1: Historical versions
Basic dataStandard ID: GB/T 28267.1-2021 (GB/T28267.1-2021)Description (Translated English): Steel cord conveyor belts - Part 1: Design, dimensions and mechanical requirements for conveyor belts for general use Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G42 Word Count Estimation: 18,134 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 28267.1-2021: Steel cord conveyor belts - Part 1: Design, dimensions and mechanical requirements for conveyor belts for general use---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Steel cord conveyor belts - Part 1.Design, dimensions and mechanical requirements for conveyor belts for general use ICS 53.040.20 G42 National Standards of People's Republic of China Replace GB/T 28267.1-2012 Steel Cord Conveyor Belt Part 1. General purpose conveyor belt design, size and mechanical requirements (ISO 15236-1.2016,MOD) Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee Steel Cord Conveyor Belt Part 1. General purpose conveyor belt design, size and mechanical requirements 1 ScopeThis part of GB/T 28267 specifies the performance and structural requirements of conveyor belts with longitudinal steel ropes as reinforcements. Chapter 6 Provisions The structural requirements are applicable to the design of a single belt and the design of all model series in GB/T 28267.2. This section applies to steel cord conveyor belts.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 528 Determination of tensile stress and strain properties of vulcanized rubber or thermoplastic rubber (GB/T 528-2009, ISO 37.2005, IDT) GB/T 3512 Hot air accelerated aging and heat resistance test of vulcanized rubber or thermoplastic rubber (GB/T 3512-2014, ISO 188. 2011, IDT) GB/T 3684 Conveyor belt conductivity specification and test method (GB/T 3684-2021, ISO 284.2012, MOD) GB/T 3685 Laboratory-scale test method for combustion characteristics of conveyor belts (GB/T 3685-2017, ISO 340.2013, MOD) GB/T 5753 Steel cord conveyor belt total thickness and covering layer thickness determination method (GB/T 5753-2013, ISO 7590. 2009, IDT) GB/T 5754.2 Steel cord conveyor belt longitudinal tensile test Part 2.Determination of tensile strength (GB/T 5754.2- 2017, ISO 7622-2.2015, IDT) GB/T 5755 Steel wire core conveyor belt rope and coating glue adhesion test under the original state and after heat aging test (GB/T 5755-2021, ISO 7623.2015, IDT) GB/T 7983 Conveyor belt transverse flexibility (grooving) test method (GB/T 7983-2013, ISO 703.2007, MOD) GB/T 9867 Determination of abrasion resistance of vulcanized rubber or thermoplastic rubber (rotating roller abrasion machine method) (GB/T 9867-2008, ISO 4649.2002, IDT) GB/T 17044 Steel wire rope core conveyor belt cover layer and belt core layer adhesion strength test (GB/T 17044-2020, GB/T 8094.2013, IDT) GB/T 28267.2 Steel cord conveyor belt Part 2.Preferred belt type (GB/T 28267.2-2015, ISO 15236-2. 2004, MOD) GB/T 33514 Determination of the transverse and vertical displacement of the steel wire rope of the steel wire rope core conveyor belt GB/T 33525 conveyor belt cover performance category (GB/T 33525-2017, ISO 10247..1990, MOD) GB/T 39795 General Purpose Conveyor Belt Conductivity and Flammability Safety Requirements3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Edgewidth bk The width of the adhesive layer between the outer wire rope and the belt edge. see picture 1. 3.2 Buffer layer breaker A type of transverse reinforcement in the conveyor belt, generally composed of fabric, buried in the upper cover layer and (or) lower cover layer, the distance from the longitudinal rope to 1mm less, as part of the covering layer. See Figure 2. Note. Rewrite GB/T 5753-2008, definition 2.1. 3.3 Cross piece weft A type of transverse reinforcement in the conveyor belt, generally composed of steel wires, buried above and (or) below the longitudinal steel wire ropes. The 1mm area is used as a part of the belt core. See Figure 3. Note. Rewrite GB/T 5753-2008, definition 2.2.4 Symbols and unitsThe symbols and units listed in Table 1 apply to this document. Table 1 Symbols and units 6.2 Band width The width and limit deviation of the belt are shown in Table 3.They refer to the width of the belt at the time of manufacture, not the width of the belt under tension after installation. 6.3 The width of the tape edge and the reinforced width of the tape 6.3.1 Edge rubber width The width (bk) of the tape edge should not be less than 15mm and not more than 40mm. The approximate value is calculated by the following formula. bk≈5×S6 6.3.2 Reinforced width of belt The enhanced width (bt) of the belt is calculated as follows. bt=B-2bk-d (See 7.2.2) 6.4 Number of steel wire ropes The minimum breaking force (Fbs) of the wire rope (see 7.1), the minimum breaking strength of the belt (KN) and the belt width (B) can be used to obtain the belt The minimum number of wire ropes. 6.6 Cover thickness The minimum thickness (S2 or S3) of the upper and lower covering layers of the standard belt (see 5.1) should not be less than 0.7d. When 0.7d≤4mm, the upper and lower covering The minimum thickness of the cover layer should not be less than 4mm. Belts with transverse reinforcement (see 5.2). The minimum cover thickness of the belt with a buffer layer can be greater than the specified value (depending on the buffer layer Design); the minimum covering layer of the belt with transverse members can be less than the specified value. The actual cover layer thickness should be determined according to the performance type of the cover layer and the conveying working conditions. 6.7 Tape thickness The belt thickness (S1) is the sum of the belt core layer thickness (S6) and the cover layer thickness (S2 and S3). When the tape thickness is measured according to GB/T 5753, its maximum value (S1max) should be equal to 1.1S1, and its minimum value (S1min) is specified as follows. When S1≤20mm, S1min= (S1-1)mm; When S1 >20mm, S1min= (S1-1.5)mm. The two surfaces of the belt should be flat and parallel, and the difference between the thickness of the belt at any two points (for example, along the bandwidth) shall not exceed 0.05S1. 6.8 Belt length The length limit deviation of the conveyor belt provided by the manufacturer to the user is shown in Table 4. The length of the order provided by the user should include the length required for the production of the belt joint and the external test.7 Mechanical performance requirements7.1 Wire rope breaking force The wire rope breaking force shall be based on the test report of the wire rope manufacturer. If the user requests to take out the steel wire rope from the conveyor belt as a test The sample is tested, and the test should be carried out in accordance with GB/T 5754.2. The wire rope breaking force (Fbs) should be at least equal to the value obtained by the following calculation. multiply the minimum breaking strength of the belt (KN) by the bandwidth (B), and then Divide by the number of wire ropes (n), namely. 7.2 The position of the wire rope in the belt 7.2.1 General The position of the wire rope in the belt is determined according to GB/T 33514. 7.2.2 Lateral position The wire rope should stretch in a straight line in the belt. When measured in accordance with GB/T 33514, the value of the wire rope spacing deviation from the nominal spacing is greater than The number of steel wire ropes of ±1.5mm shall not be greater than 5% of the total number of steel wire ropes. The deviation between the actual value of the belt reinforcement width (bt) and the calculated value [(n-1)×t] should not be more than 1%. Example 2.A steel cord conveyor belt (ST), length 900m, width 1400mm, minimum tensile strength 2500N/mm, upper cover layer thickness 10mm, lower cover The thickness of the cover layer is 6mm, and the rubber performance type code of the cover layer is D. Both the upper and lower cover layers contain a transverse reinforcement (buffer layer) composed of fabric materials. The marks are as follows. 900m steel cord conveyor belt, GB/T 28267.1-1400ST2500/10T 6TD A2 Example 3.A steel cord conveyor belt (ST), length 1000m, width 1000mm, minimum tensile strength 800N/mm, upper cover layer thickness 6mm, lower cover The thickness of the cover layer is 3mm, and the rubber performance type code of the cover layer is L. Both sides of the core layer contain steel transverse reinforcements (transverse parts). The belt type B1 is marked as follows. 1000m steel cord conveyor belt, GB/T 28267.1-1000STS/S800/6 3L B1 10 Ordering information The minimum requirements that the user should provide when ordering include. belt length, belt width, tensile strength, covering layer thickness, and covering layer performance. Users who order or purchase replacement belts from multiple conveyor belt manufacturers should also provide information on the number of steel ropes in order to ensure the interchangeability of the conveyor belts. And spacing information (if possible, the diameter of the wire rope needs to be informed), and whether the conveyor belt is required to be a standard type or with a buffer layer or transverse parts, Refer to GB/T 28267.2 "Preferred Belt Type". For other useful information that the buyer needs to provide, see Appendix A. 11 logo 11.1 The steel cord conveyor belt is a product that has been used for a long time, and its logo should be durable and should be made by moulding. But this method may lead to When the conveyor belt passes the idler roller, the noise increases, and the manufacturer and the purchaser need to negotiate and agree before using this marking method. 11.2 The sign of steel cord conveyor belt shall contain at least the following information. a) The name and number of this section; b) With the name of the manufacturer; c) The letter ST should be preceded by the tensile strength, in units of cattle per millimeter (N/mm), such as ST2500 (see 6.1 and Chapter 9); d) The type of belt is in accordance with GB/T 28267.2, such as A1 or B2; e) The thickness of the cover layer, in millimeters, including the type of buffer layer or transverse member; f) The last two digits of the production year; g) No more than 5 digits with number. 11.3 The height of the mark should be between 20mm ~ 80mm. If the logo is made by moulding, the cover layer thickness is not more than 6mm, The depth of the characters should be at least 1mm; for tapes with a thickness greater than 6mm, the depth of the characters should be at least 3mm. 11.4 The belt mark should be located on the upper covering layer, and the width of the conveyor belt is not greater than 800mm. The mark should be located about 50mm away from the belt edge; For conveyor belts with a degree greater than 800mm, the mark should be located about 100mm away from the belt edge. The distance between two adjacent signs should not be greater than 15m. Conveyor belts with a width not greater than 1400mm can be marked on only one side of the belt. 11.5 The information given in 11.2 should also be marked on the outside of the conveyor belt roll. In addition, some other information can be produced at the request of the buyer. symbols of.Appendix A(Informative appendix) Useful information that the buyer needs to provide A.1 Applicability When ordering, the buyer should confirm according to Chapter 10 (Ordering Information) and provide the seller with useful information for belt design and selection. A.2 Replacement belt When ordering to replace the conveyor with a new belt, the following information should be provided. a) The detailed characteristics of the belt to be replaced, that is, the diameter of the wire rope, the spacing, the number of wire ropes, the thickness of the covering layer, the transverse reinforcement, and the covering layer Types of; b) Bandwidth, in millimeters; c) Belt speed in meters per second; d) The diameter of the roller, in millimeters, mark the position of the convex roller; e) Tensioning method and number of tensioning devices; f) Type of driving device, including its arrangement and connection method; g) Whether the driving roller is insulated or conductive; h) The spacing, length and angle of the rollers; i) Contour sketch, indicating the position of the transmission device, tensioning device, unloader, etc., and the curvature of the vertical/horizontal bend of the running line Line radius; j) Belt length, in meters; k) With joint type; l) Motor power installed; m) Start type; n) The safety category required by GB/T 39795, i.e. 1, 2A, 2B, 3A, 3B, 4, 5A, 5B or 5C; o) The transition distance between the head and the tail; p) Crack prevention/detection system. A.3 Additional information for new devices Where appropriate and possible, the following additional information should be provided. a) The material being transported; b) Material condition. wet, dry, sticky, greasy or abrasive, if it is hot or cold, the temperature can be known Under the circumstances, state the temperature or describe the situation, whether a cleaner is needed; c) The bulk density of the material; d) The size (three-dimensional) of the bulk material, in millimeters; e) The average value of the material size, in millimeters; f) Approximate screening analysis of materials (see GB/T 10061[1] and GB/T 15602[2]); g) The material handling method before placing the material on the conveyor belt; h) Whether it needs to be adjusted during the feeding process, the preferred feeder type; i) The daily workload and hourly workload of the conveyor, and the number of daily working hours; j) Conveyor discharge method; k) The height of ascent and descent, in meters; l) The initial conveying distance (the center distance between the head roller and the tail roller), in meters; m) Drive position; n) Power supply information, that is, whether the voltage is AC or DC; o) Contour sketch of the conveyor device; p) The preferred roller layout and groove angle; q) Environmental conditions; r) Other characteristic requirements or test requirements. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 28267.1-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 28267.1-2021_English as soon as possible, and keep you informed of the progress. 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