MT 193-1989 English PDFUS$559.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. MT 193-1989: Mine hydraulic prop Status: Obsolete
Basic dataStandard ID: MT 193-1989 (MT193-1989)Description (Translated English): Mine hydraulic prop Sector / Industry: Coal Industry Standard Classification of Chinese Standard: D97 Word Count Estimation: 14,160 Date of Issue: 3/31/1989 Date of Implementation: 4/1/1989 Summary: This standard specifies the use of hydraulic mining toppers pillar classification, parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage. This standard applies to coal mining face toppers for use by more than 600k N rated working resistance of a single column and single sliding pillar jack composed toppers. MT19:---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.Mine hydraulic prop Ministry of Energy Standards MT/T 193-89 Mine hydraulic cutting roof pillar 1989-03-31 ratified 1989-04-01 implementation Approved by the Ministry of Energy of the People's Republic of China Contents1 Topic content and scope of application 1 2 Normative references 1 3 Terminology 1 4 Product classification, basic parameters 1 5 Technical requirements 3 6 Test method 5 7 Inspection rules 8 8 Marking, packaging, transport and storage 9 Appendix A Position and Size of Pads by Various Loading Methods (Supplementary) 10 Mine hydraulic cutting roof pillar1 Topic content and scopeThis standard specifies the classification, parameters, technical requirements, test methods, inspection rules, signs, packaging, transportation, Storage. This standard applies to single columns and single push-pull rollers with a rated working resistance of 600 kN or more for cutting roofs in coal mining working faces. Cut-top pillar consisting of jacks.2 Reference standardsGB 197 Tolerance and fit of common thread (diameter 1 ~ 355mm) GB 979 carbon steel casting classification and technical conditions GB 1184 shape and position tolerances GB 1804 Limit deviation of tolerances and dimensions without fit tolerance GB 2649 Sampling method for mechanical property test of welded joints GB 2650 Welded joint impact test method GB 2651 Welded joint tensile test method GB 2652 Welding (and surfacing) metal tensile test method GB 2653 Test method for bending and flattening of welded joints JB8 Product Tag JB3338 Technical Conditions of Hydraulic Helical Cylindrical Helical Spring Q/ZB74 general technical conditions for welding parts MT 76 emulsified oil for hydraulic support MT 94 Mine Hydraulic Support, Pillar, Jack Bore Series MT 96 Mine hydraulic support type double telescopic column type test specification MT 97 Mine hydraulic support jack type test specification MT 98 Hydraulic Support Hose Assembly and Intermediate Joint Assembly Type Test Specification MT 112 mining single hydraulic prop MT 119 Mine hydraulic support valve type test specification MT 177 Mine hydraulic support valve pressure and flow series MT 178 Mining hydraulic support valve connection type, size series MT 179 Mining Hydraulic Support Valves General Technical Specifications3 Terminology3.1 Mine hydraulic cutting roof pillars (hereinafter referred to as "pillars"). composed of a single column and a single push-pull jack (hereinafter referred to as "jack") Desk pillar. It relies on the principle of hydraulic transmission to complete the forward movement of the support roof, the push conveyor and the uprights. 3.2 Upright. It consists of a top cover, a base, an oil cylinder, a movable column (including an extension rod), and components mounted on it. 3.3 Jack. It consists of oil cylinder, piston rod, connecting parts and components mounted on it. 4 Product classification, basic parameters 4.1 This standard is divided into three categories according to the structural characteristics and application scope of the product. a. Pillars composed of single telescopic columns; b. a pillar composed of double telescopic columns; c. Pillar with anti-fall and anti-slip mechanism. 4.2 One-way valve, safety valve, control valve and other components can be separately installed on the column or jack. 4.3 The columns and jacks shall have their own parameters and series. 4.4 Modeling method. 4.4.1 Type and feature codes are written in capital letters of Chinese Pinyin. Z means “supporting” products; Q means “cut top pillar”; second feature list Telescopic columns are not marked with the code, S is used for "double telescoping"; anti-fall and anti-skid cut-top pillars, F is used for supplementary features; Arabic numerals are used for the main parameters of the columns The modified serial number is indicated by parenthesized Chinese Pinyin letters (A), (B), (C), which is used to distinguish different products with the same type, main parameter, and feature code. 4.4.2 The product model is not allowed to use the region or unit name as the feature code to distinguish different products. 4.4.3 Model example. ZQ14/1000 cut-top pillar, indicating that the mine hydraulic cut-top pillar is composed of a single telescopic column with a height of 1.4m and a rated working resistance of 1000kN and a corresponding jack. 4.5 Basic parameters. 4.5.1 The inner diameters of the cylinders of the columns and jacks shall comply with the MT 94 regulations. 4.5.2 The maximum height of the columns shall comply with the requirements in Table 1.5 Technical requirements5.1 The product shall meet the requirements of this standard and be manufactured in accordance with the drawings and relevant technical documents approved by the prescribed procedures. 5.2 Raw materials, standard parts, seals, purchased parts, and outsourced parts can be used only after they have passed the inspection of the quality inspection department of the pillar manufacturer. 5.3 General technical requirements. 5.3.1 The materials of main parts shall be consistent with those specified in the design. Without reducing the performance and life of the product, Agree to allow substitution. 5.3.2 The basic parameters of the pillar shall comply with the provisions of Article 4.5 of this standard. The maximum height of the column and the stroke of the jack piston rod allow a deviation of 20mm. 5.3.3 The quality of steel castings shall meet the requirements of GB 979. The material content of the top cover and base of the column is not more than 0.05%. 5.3.4 Forgings shall be free from defects such as interlayers, cracks, folds, and stutters, and non-machined surfaces are allowed to have local defects caused by the removal of oxide scale But its external geometry should meet the design requirements. 5.3.5 Weldments shall comply with Q/ZB74. Weld quality shall meet the following requirements. a. Weld mechanical properties. b. Welds subjected to liquid pressure shall be pressure tested. the test pressure of the weld of the cylinder of the column shall not be less than twice the rated working hydraulic pressure of the column; The test pressure of the remaining welds shall not be less than 1.5 times the rated working hydraulic pressure of the welds. 5.3.6 The high-pressure hose assembly and intermediate joints shall meet the requirements of MT 98. 5.3.7 Cylindrical coil springs for hydraulic parts shall comply with the provisions of JB3338. 5.3.8 6H/6g in GB 197 is used for common thread. 5.3.9 Machining dimensions without tolerances indicated in the drawings, who are inclusive and tolerant, should meet IT14 level in GB 1804; non-inclusive Responsible parties meet the above standards of IT15. 5.3.10 Those who have not machined the position tolerances in the drawings shall meet the tolerances specified in Class C of GB 1184. 5.3.11 The quality of the electroplated coating of parts shall meet the design requirements. Caused by defects in base metals, trachoma, and plating processes The diameter of pits or pinholes should be less than 0.2mm, and the number should be no more than 15 points/dm2. 5.4 Assembly technical requirements. 5.4.1 All parts must pass the inspection before they can be assembled. Do not deform, rust, or bruise caused by storage or transportation. Parts are used for assembly. 5.4.2 Before assembly, the burrs, burrs and iron filings of the parts shall be removed. The inside of the hydraulic components must be cleaned strictly, and the cleanliness in the product cavity should meet The following requirements. a.The average residue of each single telescopic column is no more than 40mg, the highest one is less than 50mg; each residue of the double telescopic column is flat Neither is greater than 60mg, the highest one is less than 70mg; b. The residue of each jack is not more than 30mg; c. Residues of safety valves, check valves, control valves and other valve parts, each not more than 10mg. 5.4.3 All threaded connections and finished surfaces indicated in the drawings that need to be protected should be coated with rust-proof wire degreasing for mining. 5.4.4 Parts and components shall be fully assembled, correctly installed and firmly connected. 5.4.5 All exposed oil holes shall be tightly sealed with plastic caps or plastic plugs after assembly. 5.4.6 After assembly, the anti-falling device of the top cover of the column should be reliable and flexible to adjust, and the adjustment angle should meet the design requirements; The down, left and right swing angles should meet the design requirements. 5.5 Exterior pillar requirements. 5.5.1 The non-machined surface of the casting shall be flat, without flash, without oxide scale, without gates, risers, casting sand, etc. 5.5.2 Exposed surfaces, except those that have been surface treated, should be coated with anti-rust paint (except for the lower surface of the column base). Anti-rust paint should adhere firmly. 5.5.3 The exterior paint layer shall be bright, flat, uniform in color, without cracks, spalling and flow marks, without mechanical impurities, and without trimming marks. 5.5.4 The color of the anti-rust paint should be comfortable and eye-catching, suitable for underground observation. 5.5.5 The plating layer shall be uniform and beautiful. There should be no blistering, peeling, peeling, rusting or dendritic crystals. 5.5.6 The appearance of the weld shall be flat and free of welding slag and welding spatter. Defects such as slag inclusion, discontinuity and cracks are not allowed. 5.5.7 All kinds of instruction signs should be installed correctly, properly positioned, firm and reliable. 5.6 Performance requirements. 5.6.1 Performance requirements of the entire pillar 5.6.1.1 Operating performance. easy to operate, accurate and flexible in various actions, no astringent stagnation, no card and leakage of working fluid. 5.6.1.2 Under the condition of no back pressure, the minimum starting pressure of the piston chamber and jack of the column is not greater than 3.5MPa, and the movable column cavity of the column The minimum starting pressure is not greater than 7.5MPa. 5.6.1.3 The lifting speed of the column and the expansion and contraction speed of the jack shall meet the design requirements. The initial supporting force of the column is not less than 95% of the design value. 5.6.1.4 The push-pull connection mechanism can be adjusted flexibly and in place, and the amount of activity meets the design requirements. When the jack is at 110% of the rated supply pressure, All parts must not be permanently deformed or damaged. 5.6.1.5 Pillars with anti-fall and anti-slip mechanisms shall be able to ensure the support of the columns at an angle not greater than the given angle of the design. Set location and work properly. 5.6.1.6 Sealing performance. The movable column cavity, piston cavity of the column and the piston rod cavity and piston cavity of the jack are in a low-pressure and high-pressure sealed state, respectively. Under the conditions, the pressure must not drop at the same temperature within 5 minutes, and no leakage should occur within 4 hours. 5.6.1.7 Durability a. Make the top cover of the column in the condition of Appendix A1 (see Appendix A) and the base in the condition of Appendix A3, and follow the rated working resistance of the column. Ring loading, the effective stroke of the movable column is not less than 100m, the number of cycles is not less than.2000 times, and the retest of 5.6.1.6 every 50m of the piston cavity should meet the requirements; b. The oil cylinder of the jack is in the extreme condition of being connected to the column on the vertical surface, and the number of push and pull cycles at the rated liquid supply pressure is not less than 3000 times. The parts must not be damaged, and the cumulative residual deformation of the joints, pins and other connecting parts is less than 0.5% of the respective loaded length. 5.6.2 Column Performance Requirements 5.6.2.1 Working characteristics of single telescopic column. at a flow rate of 0.04L/min, its working resistance should not be greater than the rated working resistance. 110%, and not less than 90% of the rated working resistance. 5.6.2.2 Durability of column. In addition to meeting the requirements of 5.6.1.7a, in the case of back pressure in the piston cavity, the live column cavity is rated. The liquid supply pressure is used to lower the column, and then lift the column without load. The number of reciprocations is not less than.2000. The retest 5.6.1.6 should meet the requirements. 5.6.2.3 The strength of single telescopic columns shall meet the following requirements. a.The movable column is fully extended, the piston chamber is given a 125% rated liquid supply pressure, and the limit mechanism must not cause permanent deformation and damage; b. At the maximum height, the axial load is 150% of the rated working resistance, and the parts must not be permanently deformed and damaged; c. When the movable column is extended 2/3, it bears.200% of the rated working resistance in the axial direction, and the permanent deformation of the piston and cylinder is not more than 0.5mm. The base must not be damaged, and the movable column can be raised and lowered freely (only one for type inspection); d. The column is at the maximum height, and the top cover and the base are in the various stress states shown in Appendix A (Supplementary). When the applied load is At 110% of the rated working resistance, all parts must not be permanently deformed or damaged, and the stress at the dangerous section does not exceed the yield limit of the material; e. When the column is at the maximum height and bears the initial support load, it can withstand an impact energy of 15kN · m in the axial direction. Permanent deformation and damage (factory inspection can be omitted). 5.6.2.4 The pillar oil cylinder shall not be broken into pieces under overload conditions. (A structure is tested on only one material). 5.6.2.5 Double telescopic columns shall meet the requirements of MT 96. The eccentric loading method shall be implemented in accordance with Appendix A (Supplement) of this standard. 5.6.3 In addition to the requirements of 5.6.1.7b of this standard, the weight of the jack shall also meet the requirements of MT 97. 5.6.4 Valves shall meet the requirements of MT 119 and MT 177 ~ 179. Where the relief valve relief flow is less than 3L/min, it is implemented as MT 112. 5.7 After the entire pillar has passed the test, the remaining working fluid should be drained and treated for antifreeze. 5.8 Complete supply scope. a. complete pillars; b. special tools; c. Spare parts. 5.9 Three months from the date of shipment, when the user arrives at the acceptance inspection, the opening pressure of the safety valve is allowed to be re-adjusted before testing. 5.10 From the date of shipment of the last pillar of the manufacturer, if the product is damaged or fails to work normally due to poor manufacturing quality within one year, The manufacturer shall be responsible for repairing or returning the product (or parts) for the user free of charge.6 Test method6.1 General requirements 6.1.1 The working fluid used in the test is an emulsion prepared by using the emulsified oil specified by MT 76 and neutral soft water at a weight ratio of 595. (The working fluid when used underground is a weight ratio of emulsified oil to neutral water of 298). 6.1.2 During the whole test, the temperature of the working fluid should be maintained at 10 ~ 50 ℃. 6.1.3 The working fluid should be filtered with a 0.125mm precision filter and equipped with a magnetic filter device. 6.1.4 The liquid supply system and test equipment used in the test shall meet the design requirements of the sample being tested. 6.1.5 Measurement accuracy 6.1.5.1 Measurement accuracy level. C level 6.1.5.2 Error. Any measurement system calibrated or compared according to relevant standards, if their system error does not exceed the limits listed in Table 4 Can only be used for testing. 6.1.5.3 The accuracy of the direct-reading pressure gauge is 1.5, and the pressure measurement range should be 140% ~.200% of the test pressure. 6.1.5.4 The instruments, meters and other measuring tools used for testing must be checked and calibrated regularly, and their performance and errors should meet the requirements of relevant standards. 6.1.5.5 During the test, the test results shall be recorded in a timely manner. 6.2 Appearance quality inspection Visual inspection shall be carried out in accordance with 5.5.1 ~ 5.5.7 of this standard. Forgings shall meet the requirements of 5.3.4. 6.3 Assembly quality inspection Visual inspection shall be carried out in accordance with 5.4.1 to 5.4.6 of this standard. The top cover adjustment angle and jack swing angle are measured with an angle ruler and a ruler. 6.4 Weld quality inspection 6.4.1 Check all welds visually. Its external defects must not exceed the allowable range specified by Q/ZB74, and a 10-time magnifying glass can be used if necessary. 6.4.2 According to the provisions of GB 2649 ~ 2653, a welding process qualification test is performed, and the test results shall meet the requirements of 5.3.5a of this standard. 6.4.3 Carry out a pressure test on welds subjected to liquid pressure in accordance with the provisions of 5.3.5b of this standard, and maintain the pressure when the pressure increases to the specified value 5min, then reduce to the rated pressure, and tap lightly near the weld with a hand hammer to check that there is no leakage. 6.5 Cleanliness inspection Wash the tested parts with oil or emulsion twice, then filter the cleaning solution with a filter equivalent to 0.125mm accuracy, and then clean the net The residue is dried and weighed in accordance with the provisions of 5.4.2 of this standard. 6.6 Coating quality inspection 6.6.1 The appearance quality inspection should be under the natural scattered light or white transmitted light without reflected light, and its illumination is not less than 300lx (that is, equivalent Place the illuminance on the surface to be inspected at 500mm under a 40W fluorescent lamp), 300mm from the surface to be inspected, and perform visual inspection at 45 °. Such as When the observed base point is in dispute, it can be identified with a 3 to 5 times magnifying glass. 6.6.2 Filter paper for porosity test is dipped in chemical reagent, and then the filter paper is affixed to the surface of the coating to be tested, and then the filter paper is removed to calculate the unit The number of holes in the area. 6.7 Performance test items and methods for the entire pillar (see Table 5) 6.8 Performance inspection items and methods for single telescopic columns (see Table 6)7 Endurance test1) The movable column is raised to 2/3 of the hydraulic stroke, and the top cover and the base are in the appendix respectively. A1 and A3 are under stress, and continuously cycled at the rated working load. Set. Loading pressure from 0 to rated working pressure, then unloading, loading speed 20 ~ 25mm/min 2) Add a block under the jack cylinder so that the base of the jack and the column is vertical. The surface is at the extreme height difference, the pillars are tightened, and the The piston rod cavity and the piston cavity are cyclically loaded. Every 500 inspections One-time external connection parts and short-time sealing 3) Ba......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of MT 193-1989_English be delivered?Answer: Upon your order, we will start to translate MT 193-1989_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 193-1989_English with my colleagues?Answer: Yes. The purchased PDF of MT 193-1989_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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