MT/T 779-1998 English PDFUS$319.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. MT/T 779-1998: Drawing hoist Status: Obsolete
Basic dataStandard ID: MT/T 779-1998 (MT/T779-1998)Description (Translated English): Drawing hoist Sector / Industry: Coal Industry Standard (Recommended) Classification of Chinese Standard: D93 Classification of International Standard: 73.100.40 Word Count Estimation: 8,880 Date of Issue: 11/10/1998 Date of Implementation: 4/1/1999 Quoted Standard: GB 3836.1-1983; GB 3836.2-1983; GB 10089-1988; GB 10095-1988; GB/T 13306-1991; GB/T 13384-1992 Summary: This standard specifies the prop grain cars (hereinafter referred to as grain car) classification and nomenclature, requirements, test methods, inspection rules, marking, packaging, transportation and storage. This standard applies to coal dust, or explosive gas environments of grain cars. MT/T 7:---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.Drawing hoist People's Republic of China Coal Industry Standard Back column winch Drawing hoist 1998-11-10 Approved.1999-04-01 Implementation Approved by State Coal Industry Bureau ContentsForeword Ⅱ 1 Scope 1 2 Normative references 1 3 Classification and naming 1 4 Requirement 2 5 Test method 3 6 Inspection rules 3 7 Marking, packaging, transportation and storage 4ForewordIn order to adapt to the development of the design and production of domestic back column winches, and to facilitate the standardization and serialization of such products, this standard is specially formulated. This standard is proposed by the Industry Management Department of the State Coal Industry Bureau. This standard is under the jurisdiction of the Technical Committee for Standardization of Special Equipment for Coal Mines. This standard was drafted. Huainan Coal Mine Machinery Plant. The main drafters of this standard. Liu Zhiyong, Fan Zhengquan, Wang Zhiwei. This standard entrusts the Subsidiary Transport Equipment Branch of the Standardization Technical Committee for Special Equipment of Coal Mine to interpret. Back column winch1 ScopeThis standard specifies a return column winch (hereinafter referred to as the winch) Classification and naming, requirements, test methods, inspection rules, Marking, packaging, shipping Loss and storage. This standard applies to winches used in environments with coal dust or explosive gases.2 Reference standardsThe following standards contain provisions that, through reference in this standard, constitute provisions of this standard. When this standard was published, the editions shown were all Is effective. All standards will be revised, and all parties using this standard should explore the possibility of using the latest versions of the following standards. GB 3836.1-1983 General requirements for explosion-proof electrical equipment for explosive environments GB 3836.2-1983 Explosion-proof electrical equipment for explosive environments "d" GB/T 10089-1988 Cylindrical worm and worm gear accuracy GB/T 10095-1988 involute cylindrical gear accuracy GB/T 13306-1991 Signage GB/T 13384-1992 general technical requirements for packaging of mechanical and electrical products "Coal Mine Safety Regulations" formulated by the Ministry of Energy of the People's Republic of China in.19923 Classification and naming3.1 The type of winch is single-cylinder winding type, which adopts worm reducer and open gear transmission. 3.2 Product Model. winch Back column Wire rope average static tension, unit 10 kN Modify the serial number 3.3 The basic parameters of the winch shall meet the requirements in Table 1. Table 1 Model JH-5 JH-8 JH-14 JH-20 JH-26 (28) Wire rope average static tension, kN 50 80 140.200 260 (280) Wire rope average rope speed, m/s ≤0.2 reel Diameter, mm 260 300 400 440 520 Capacity of rope, m 80 100 130 170.200 Wire rope Diameter, mm 15.5 17 21.5 24.5 28 Structure rope 6 × 19 Nominal tensile strength, MPa 15504 Requirements4.1 Basic requirements The winch shall meet the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.2 Working conditions 4.2.1 Ambient temperature is -10 ~ 40 ℃; 4.2.2 Ambient relative humidity does not exceed 95% (25 ℃); 4.2.3 The methane, coal dust, hydrogen sulfide, carbon dioxide, etc. in the surrounding air must not exceed the safe content specified in the Coal Mine Safety Regulations; 4.2.4 The duty system is a low-speed heavy-duty discontinuous type. 4.3 Performance 4.3.1 The winch operation should be stable and reliable, and the transmission and bearings should not have abnormal vibration and sound during operation. 4.3.2 When the winch is operating under the rated load, the temperature rise of the reducer lubricant must not exceed 600 ℃, the maximum oil temperature should not be greater than 80 ℃. 4.3.3 There shall be no oil leakage in the winch reducer. 4.3.4 The winch base has holes for convenient fixed installation, and is compatible with the tension. 4.3.5 The winches of the same type shall be interchangeable. 4.4 Safety, health and environmental protection 4.4.1 The winch shall comply with the relevant regulations in the Coal Mine Safety Regulations. 4.4.2 The rims of the rope baffles at both ends of the winch drum should be 2.5 times the diameter of the outermost wire rope. 4.4.3 The electrical equipment supporting the winch shall comply with GB 3836.1 and GB 3836.2 and must be approved by the National Product Quality Inspection Center. Explosion-proof inspection, and obtain inspection certificate. 4.4.4 The noise value of the winch in working condition shall not exceed the requirements in Table 2. Table 2 Model JH-5 JH-8 JH-14 JH-20 JH-26 (28) Noise value, dB (A) 88 90 4.4.5 The drive part of the winch shall be provided with safety protection devices. 4.5 Manufacturing and assembly requirements 4.5.1 The accuracy of the spur gear of the winch shall not be less than GB/T Regulations 9-9-8 of 10095-1988; cylindrical and arcuate worms, worms Wheel accuracy should conform to GB/T 10089-1988 level 8 requirements. 4.5.2 The materials and purchased parts of the winch shall comply with the relevant national and industry standards and have a certificate of conformity. Outsourcing documents should conform to the figure The sample requirements can be used after passing the inspection. 4.5.3 The surface roughness of the rims of the rope stoppers at both ends of the drum shall not be greater than 50. 4.5.4 All parts should be cleaned of burrs and flashes before assembly. The sand in the gearbox should be cleaned, and no iron filings, oxide scale, etc. are allowed. Materials should be painted with paint resistance after cleaning. The cleanliness of the reducer shall not exceed the requirements in Table 3. table 3 Model JH-5 JH-8 JH-14 JH-20 JH-26 (28) Cleanliness, mg 600 900 1100 Note. Check with 80 mesh strainer. 4.5.5 The connection of all fasteners shall be reliable and there shall be no looseness. The screws on the roll must not be higher than the circumference of the roll. 4.6 Appearance quality requirements 4.6.1 The burrs and sharp edges on the surface of each component shall be leveled and polished, and iron filings, rust, welding slag, scale and oil shall be cleaned up. 4.6.2 The winch shall be painted in accordance with the following requirements. a) Appearance surface is painted with gray magnetic paint; b) the dark red paint is applied to the space of the roller rope; c) Lubrication points and explosion-proof signs should be painted with red magnetic paint; d) Painting should be uniform, and no defects such as missing coating, pinholes, bubbles, cracks, peeling, sagging, etc. are allowed. 4.7 Complete supply scope of winch (except wire rope and cable) 4.7.1 Finished winches with electric motors. 4.7.2 Electrically controlled equipment that complies with the product maintenance instructions. 4.7.3 Random tools specified in product drawings. 4.7.4 Random technical documents.5 Test method5.1 Dry run test The winch should be carried forward and backward 15 Min dry run test and check the following. a) Stable operation, no abnormal sound, no impact noise; b) all the joints and fasteners are not loose; c) No oil leakage at the seal; d) The screws on the reel meet the requirements of 4.5.5; e) The moving distance on the wire rope is not less than 10 In the case of m, use a stopwatch to detect the maximum and minimum rope speeds of the rope Value, and meet the requirements of Table 1. 5.2 Load test Load test using vertical lifting method. a) 50% of the rated load is used for forward and reverse tests, and the number of times should not be less than 3 times each; b) Use 75% of the rated load for the forward and reverse tests, the number of times should not be less than 3 times each; c) Use the rated load for forward and reverse tests, the number of times should not be less than 5 each; d) Use 120% of the rated load for each of the forward and reverse tests; e) The vertical lifting height should not be less than 5 m.6 Inspection rules6.1 Each winch must pass the inspection of the manufacturer's quality inspection department before passing the factory, and a product certificate should be attached when leaving the factory. 6.2 The types, items, methods and requirements of winch inspection are shown in Table 4. Table 4 Method and requirements of inspection items Inspection type Factory inspection type inspection 1 Manufacturing and assembly requirements 4.5 (except Table 3) △ △ 2 Visual quality of appearance, 4.6 △ △ 3 Dry run test 5.1 △ △ 4 No-load test 5.2-△ 5 Basic parameters 3.3-△ 6 Performance 4.3-△7 NoiseDistance sound level meter to winch 1 m, front, back, left, right, top of the same height as the sound source , Use A-grade slow gear to determine the average value; 4.4.4 -△ 8 Cleanliness weighing method, 4.5.4-△ 9 Electrical equipment 4.4.3-△ 10 Complete supply range visual inspection method, 4.7 △ △ Note. "△" indicates required items. 6.3 Type inspection should be carried out in the following cases. a) When new products are trial-produced or old products are transferred to production; b) when design, process or material changes affect product performance; c) when production is stopped for more than 3 years and then resumed; d) for batch or mass production, every 5 years; e) When the national quality supervision agency checks the quality of products. 6.4 Each winch needs to be inspected by the factory. The number of type inspections is 2 (1 inspection and 1 spare). Extracted from the qualified products of the manufacturer. 6.5 When the winch meets the requirements of this standard, the product is judged to be qualified. If the performance does not meet the requirements of 4.3, a re-inspection shall be carried out. After retesting If the requirements are still not met, the product is judged to be unqualified. 7 Marking, packaging, transportation and storage 7.1 Signs 7.1.1 Product Marking Each winch shall be fixed with the product label at the position specified in the drawing. The type, size and requirements of the product label should meet GB/T Regulations, and marked the following. a) the name and logo of the manufacturer; b) product name and model; c) main technical parameters; d) Manufacturing number and date of manufacture. 7.1.2 Packaging mark The outer wall of the packaging box should have obvious text and symbol signs, as follows. a) the name and address of the manufacturer; b) product name and model; c) the receiving unit and address; d) Net weight and gross weight; e) box number and external dimensions; f) date of delivery and number; g) box center of gravity line and lifting line; h) Text symbols such as "handle down" and "upside down are not allowed". 7.2 Packaging 7.2.1 Winch packaging shall comply with GB/T 13384. 7.2.2 The following technical documents shall be provided with the winch. a) product certification; b) product use and maintenance instructions; c) packing list; d) General drawing of product assembly. 7.3 Transport and storage 7.3.1 The transportation of winches shall meet the requirements of railway, highway, waterway transportation and mechanized loading and unloading. Should not be subjected to severe vibration during transportation And shock and damage. 7.3.2 The winch shall be stored in a dry, ventilated, acid-free, rain- and moisture-proof place. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of MT/T 779-1998_English be delivered?Answer: Upon your order, we will start to translate MT/T 779-1998_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of MT/T 779-1998_English with my colleagues?Answer: Yes. The purchased PDF of MT/T 779-1998_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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