GB/T 25338.1-2019 English PDFUS$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 25338.1-2019: Switch machines for railways -- Part 1: General specification Status: Valid GB/T 25338.1: Historical versions
Basic dataStandard ID: GB/T 25338.1-2019 (GB/T25338.1-2019)Description (Translated English): Switch machines for railways -- Part 1: General specification Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: S61 Classification of International Standard: 45.020 Word Count Estimation: 14,111 Date of Issue: 2019-08-30 Date of Implementation: 2020-03-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 25338.1-2019: Switch machines for railways -- Part 1: General specification---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.Switch machines for railways - Part 1.General specification ICS 45.020 S61 National Standards of People's Republic of China Replace GB/T 25338.1-2010 Railway turnout switch machine Part 1.General technical conditions 2019-08-30 released 2020-03-01 Implementation State Administration for Market Regulation Issued by China National Standardization Administration Table of contentsPreface Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Category 2 5 Technical requirements 3 6 Inspection rules 8 7 Marking, packaging, transportation and storage 9ForewordGB/T 25338 "Railway Switch Point Machine" is divided into 2 parts. ---Part 1.General technical conditions; ---Part 2.Test method. This part is Part 1 of GB/T 25338. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 25338.1-2010 "Railway Turnout Switch Machine Part 1.General Technical Conditions", and GB/T 25338.1- Compared with.2010, the main technical changes except for editorial changes are as follows. ---Modified the classification of point machines (see Chapter 4, Chapter 4 of the.2010 edition); ---Modified the technical requirements of "friction coupling" (see 5.8,.2010 edition of 5.8); ---Added the vibration resistance requirements for the superposition of two or more resonance peaks (see 5.19); ---Added "two resonance peaks" vibration frequency requirements (see 5.19). This part is proposed and managed by the National Railway Administration. Drafting organizations of this section. Xi'an Lutong No. Equipment Research Co., Ltd., Xi'an Railway Signal Co., Ltd., Tianjin Railway Signal Co., Ltd. The main drafters of this section. Zhang Hui, Hao Lina, Ding Zhaorong, Guo Jingui, Xie Mingjun. The previous versions of the standards replaced by this part are as follows. ---GB/T 25338.1-2010. Railway turnout switch machine Part 1.General technical conditions1 ScopeThis part of GB/T 25338 specifies the terms and classification of electric, electro-hydraulic and electro-pneumatic switch machines (hereinafter referred to as "point machines") for railway turnouts. Types, technical requirements, inspection rules, signs, packaging, transportation and storage. This section applies to the design, manufacture and inspection of switch machines.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 references, the latest version (including all amendments) applies to this document. GB/T 191 Packaging, Storage and Transportation Graphic Mark (GB/T 191-2008, ISO 780.1997, MOD) GB/T 755-2008 Rotating electrical machine rating and performance (IEC 60034-1.2004, IDT) GB/T 2408-2008 Determination of the flammability of plastics horizontal method and vertical method (IEC 60695-11-10.1999, IDT) GB/T 2423.16-2008 Environmental testing of electrical and electronic products Part 2.Test method Test J and guidelines. Mold growth (IEC 60068-2-10.2005, IDT) GB/T 2828.1-2012 Sampling inspection procedure by attributes Part 1.Batch inspection sampling plan retrieved by acceptance quality limit (AQL) (ISO 2859-1.1999, IDT) GB/T 4208-2017 Enclosure protection class (IP code) (IEC 60529.2013, IDT) GB/T 4942.1-2006 Protection level (IP code) classification of the overall structure of rotating electrical machines (IEC 60034-5.2000, IDT) GB/T 5171.1-2014 Low-power motors Part 1.General technical conditions3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Lockout The switch machine action lever or indicating lever is locked in the terminal position through the mechanism. 3.2 External locking device A mechanical device that is converted by a switch machine and directly locks the switch rail and the basic rail, the heart rail and the wing rail. 3.3 Squeeze the pole The rods in the switch machine that can check the status of the switch. Note. When squeezing the switch, the rod can disconnect the indicating contact of the point machine. 3.4 Locking lever The switch machine can check the close contact state of the switch and has a rod with a second locking function for the movable part of the switch. 3.5 Lock the lever The switch has a second locking function and can check the status of the rod. Note. When squeezing the switch, the rod can disconnect the indicating contact of the point machine. 3.6 Number of actions The number of times the switch machine switches from one end position of the stroke to another end position. 3.7 Rated conversion force The specified output force when the switch machine action rod or piston rod extends or pulls in. 3.8 Rated voltage The lowest voltage at the motor terminal when the DC switch machine is switched under the condition of given rated switching force. 3.9 voltage The voltage output from the power screen to the switch machine. 3.10 Action time The switch machine starts when the electric motor (electric, electro-hydraulic) or electromagnetic directional valve (electro-pneumatic) is energized, and switches from one terminal position to another terminal position Set and indicate the time when the contact is connected.4 categories4.1 Classification of switch machines by operating time The switch machines are classified according to the action time in Table 1. 4.2 Classification of switch machines according to rated conversion force The point machine is classified according to the rated conversion force in Table 2. 4.3 Classification of switch machines by power source According to the rated voltage, the DC switch machine is divided into two types. DC 160V and 180V, and the power supply voltage of the AC switch machine is three-phase 50Hz. 380V, the voltage of the electromagnetic directional valve of the electric empty switch machine is DC 24V. 4.4 Classification of switch machines by transmission mode Switch machines can be divided into electric switch machines, electro-hydraulic switch machines and electro-pneumatic switch machines according to the transmission mode. 4.5 Meaning of switch machine model5 Technical requirements5.1 Working environment of the point machine The point machine should work normally under the following environmental conditions. a) Air pressure. not less than 70.1kPa (equivalent to an altitude below 3000m); b) Ambient air temperature. -40℃~ 70℃; c) Relative air humidity. not more than 90% (at 25°C); d) There is no harmful gas or corrosive gas that can cause explosion hazard. 5.2 Action sequence of switch machine The switch machine should act accurately in the following order after the power is turned on. a) Disconnect the original contact; b) The switch machine is unlocked; c) Switch machine conversion; d) The switch machine is locked; e) Connect the new display contact. The quick switch machine and the switch machine of the traction external locking device allow d) and e) to be realized simultaneously. 5.3 Parts of the switch machine All parts of the switch machine should be inspected and qualified, and the standard parts and purchased parts should meet the relevant technical standards. 5.4 Appearance 5.4.1 The surface of metal parts and parts with electroplating and coating should be smooth and free of burrs. The coating should be free of spots, protrusions and unplated ground. There should be no burn marks on the edges and corners. The coating layer should have the same color, and there should be no defects such as wrinkles, flow marks, pinholes, and bubbles. 5.4.2 Plastic parts should have good gloss, and there should be no defects such as bubbles, cracks, lack of material, swelling, obvious deformation, scratches and burrs. 5.4.3 There should be no looseness and automatic loosening at the threaded connection and riveting. 5.4.4 The welding should be firm, and there should be no defects such as slag inclusion, bubbles, cracks, etc. 5.4.5 The surface of the casting should be smooth and free of harmful deformation, defects, protrusions, burrs, sand sticking and cracks. 5.4.6 Forgings should not have defects such as interlayers, cracks and overburning. 5.4.7 Fasteners should have anti-loosening measures. 5.5 General requirements 5.5.1 The switch machine structure should be equipped with a device that absorbs the moment of inertia and protects the motor, and the device should have a capacity greater than 1.5 times the rated switching force. 5.5.2 The switch machine should be equipped with a manual safety mechanism. Before manual operation, the safety contact should be disconnected reliably, and the circuit should not be connected without manual restoration. 5.5.3 When the switch machine is installed outside the line, it should be suitable for right-side installation or left-side installation (viewed from the head of the switch to the root of the switch), and the structure should be convenient for site modification. 5.5.4 The switch machine should meet the requirements of the protection level IP54 in GB/T 4208-2017, and the structure of oil drainage and sewage should be installed in the machine; none Maintain the protection level of the sealed switch machine should not be lower than the IP66 level. 5.5.5 The rods (moving parts that extend outside the machine) should have anti-corrosion and waterproof measures, and measures should be taken to prevent water on the moving rods from entering the machine. 5.5.6 The parts of the point machine of the same model should be interchangeable; the parts of the point machine that need maintenance should be easy to observe, disassemble and assemble. 5.5.7 The inner and sliding friction surfaces of the bearings of the switch machine (including the bearings of the electric motor), and the parts that are darkened and not surface-treated in the switch machine should be Apply grease that meets the ambient air temperature conditions specified in 5.1. 5.5.8 Electro-air point machine and electro-hydraulic point machine should be purified before the medium enters. 5.5.9 The machine cover and the machine case adopt shaft pin connection. 5.5.10 The switch machine may reserve the installation position of the monitoring device. 5.6 Motor 5.6.1 When the motor is located outside the machine and there is no other equipment protection, it should meet the requirements of the protection class IP55 in GB/T 4942.1-2006. 5.6.2 The motor adopts a short-time work system and runs for 15 minutes under the condition of 1.5 times the rated conversion force, and its temperature rise should not exceed GB/T 5171.1- The temperature rise of the insulation class specified in.2014, the fast type operation time is not less than 6min. When the ambient temperature of the test site and the operating site are designated When the maximum ambient temperature is different, the correction of the temperature rise limit should be carried out in accordance with the relevant regulations of GB/T 5171.1-2014. 5.6.3 The stator coils of DC motors should be separated by fixed and reverse windings. 5.6.4 The commutator DC motor should be able to withstand 1.5 times the rated current under the rated voltage for 60s. During operation, the commutator should not produce Harmful sparks should be generated and should not cause permanent damage to the commutator or brush surface. 5.6.5 The insulation class of the motor shall not be lower than the requirements of Class B insulation in GB/T 755-2008, and the test life is 1×106 switches. The motor of the machine should meet the regulations of Class F insulation. 5.7 Reducer and oil pump 5.7.1 The reducer should be an integral sealed structure, and there should be a protective cover when the gear is exposed in special circumstances. 5.7.2 The mounting base of the oil pump and the motor should have sufficient rigidity to ensure that it is always coaxial during operation. The exposed rotating shaft and coupling should There is a protective cover. The oil inlet pipe and oil filter should not suck in air. Air should not enter the system after pipelines such as oil and air venting are assembled. In the external leakage test of the oil pump, the static seal should not leak oil, and the dynamic seal should not drip oil within 4 hours. 5.8 Friction coupling and hydraulic relief valve 5.8.1 When the friction coupler is friction in the forward and reverse directions, the friction current difference of the DC type switch machine should be less than 0.3A (except for the fast type). The difference between the friction conversion force of the switch machine should not be greater than 15% of the rated conversion force, the first friction conversion force of the friction coupling and the stable friction conversion The force difference should not be greater than 20% of the stable friction conversion force. 5.8.2 The hydraulic relief valve should have the ability to convert more than 1.5 times the rated conversion force. 5.9 Shutter 5.9.1 The contact part of the switch should be protected by a flame-retardant transparent cover, and the flame-retardant grade should meet the V-2 level of GB/T 2408-2008. 5.9.2 The contact pressure and contact resistance between the moving contact and the static contact should meet the requirements of the product standard. 5.9.3 The allowable current through the contact and the arc breaking capacity of the contact gap should meet the requirements of the respective circuit and life, and the contact should have Sweep (except for fully sealed contacts that meet IP65). 5.10 Test life of switch machine 5.10.1 The operating times of the test life of the switch machine are divided into 3 levels. 3×105 times, 5×105 times, and 1×106 times. 5.10.2 During the life test period, all parts and components should not be damaged, and the electrical characteristics of the friction part of each force should still meet the requirements of production after wear. According to product standards or technical conditions, the contact pressure of the switch should not be less than 90% of the original specified value. Moving contact of switch after life test The contact resistance between the static contact and the fixed contact should not be greater than 3Ω. In the life test, the wearing parts and normal maintenance requirements are in accordance with the product standards. 5.11 Lock, display and squeeze 5.11.1 The non-squeezing type point machine shall be double-locked by the actuating rod and the locking rod to lock the tip of the switch rail at the end position. Action lever lock It should be able to withstand an axial locking force above 90kN, and the locking rod should be able to withstand an axial locking force above 20kN when locked. 5.11.2 The action rod of the squeezing switch machine should have a squeezing constant force mechanism above 26kN, and the S700K-C squeezing switch with external locking can be 24kN. 5.11.3 The quick switch machine used for the hump allows only the action rod to be locked, and it can also use the mechanism of elastic force to keep the tip rail tightly attached. 5.11.4 After the switch machine is switched to the terminal position and locked, when the position of the indicating lever or the locking lever is correct, the indicating contact of that position can be connected. The quick switch machine may not be equipped with an indicating rod. 5.11.5 For the switch machine used for the locking device outside the first traction point of the switch rail and the heart rail, the sum of the gaps on both sides of the gap of the indicating rod or the locking rod should not be Larger than 4mm (except for quick switch machines). 5.12 Insulation resistance 5.12.1 The normal insulation resistance between the conductive parts and between the housing should be greater than 25MΩ. 5.12.2 The moisture insulation resistance between the conductive parts and between the housing and the humid heat test should be greater than 1.5MΩ, and the motor should meet the requirements of GB/T 5171.1-2014. 5.13 Insulation withstand voltage The test power supply for switch machine insulation withstand voltage test should be 50Hz single-phase alternating current, and the test voltage value is shown in Table 3.The applied voltage time is 1min, the leakage current is 5mA. Insulation withstand voltage test is generally only performed once. When repeated tests are required, the voltage should be the original test value 80%. Among them, the motor should meet the requirements of GB/T 5171.1-2014. 5.14 Surface corrosion protection of steel and iron products Steel and iron products should be treated with surface anticorrosion. 5.15 Humidity and heat resistance The protective layer and plastic parts of the switch machine shall meet the following requirements after the alternating damp heat test. a) The total area of the corrosion area of the plating layer accounts for 5% to 15% of the main surface area of the part, and the number of parts should not exceed the part of the product. 1/10 of the total, but allow. 1) The area of the plating corrosion area of individual parts is greater than 15%; 2) Individual rust spots appear on the base metal of individual parts. b) The paint layer should meet the following requirements. 1) It is allowed to have defects such as darkening of color and a small amount of wrinkles; 2) There should be no more than 5 bubbles with a diameter of 0.5mm~3mm in any square decimeter square area on the main surface of the sample. Among them, there should be no more than 2 bubbles with a diameter greater than 1mm, and no more than 1 bubbles with a diameter greater than 2mm. Bubbles with a diameter greater than 3mm; 3) Allow individual rust spots on the main surface. c) Plastic parts should not have defects such as deformation, stickiness, or cracking. d) Before the test, the blackened, non-plated and coated parts in the switch machine should be coated with grease that meets the ambient air temperature conditions specified in 5.1. 5.16 Mold resistance After the mold growth test of the insulating parts of the switch machine, the mold growth degree should reach the level 2b specified in 12.3 of GB/T 2423.16-2008. 5.17 Salt spray resistance After the salt spray test, the galvanized and nickel-plated parts of the switch machine should meet the following requirements. a) There is no white or gray-black corrosion on the main surface of the galvanized layer; b) The main surface of the nickel-plated layer has no gray or light green corrosion products. When other anti-corrosion treatments are used, they should meet the requirements of no less than zinc plating and nickel plating. 5.18 High and low temperature resistance After the switch machine undergoes high and low temperature tests and recovers for 2 hours, the operating time and operating current should meet the requirements of the product standard. The operating time and operating current tested in the high and low temperature test can be increased by 5% compared to the rated value. 5.19 Vibration resistance The low-frequency sweep range of the switch machine is 10Hz~38Hz, the full amplitude of displacement is 2.5mm; the high-frequency sweep range is 38Hz~1000Hz, and the vibration acceleration is 73.5m/s2 (equivalent to 7.5g). The frequency range of the conversion equipment that is not directly connected to the rails and sleepers is 10Hz~500Hz, and the vibration acceleration is 4.90m/s2 (equivalent to......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 25338.1-2019_English be delivered?Answer: Upon your order, we will start to translate GB/T 25338.1-2019_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 GB/T 25338.1-2019_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 25338.1-2019_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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