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Railway Ntses Daim Hlau: Cov Khoom Siv Khoom Qhia
| Parameter | Txheem Ntses Phaj | Compromise Ntses Phaj | Insulated Ntses Phaj |
|---|---|---|---|
| Rail Joint Hom | Tib seem rail sib koom | Sib txawv seem rail sib koom | Insulated thaiv kev sib koom ua ke |
| Khoom Qib | 900A hlau (EN 10025) | 700MC Steel (EN 10149) | S355J2 + Polyamide Insulator |
| Txheem Length | 600mm (4-qhov) / 800mm (6-qhov) | 900 hli (6-qhov tapered) | 600 hli (4-qhov insulated) |
| Bolt Qhov Diameter | 26 hli ± 0.5 hli | 26mm (kawg kawg) / 24mm (tsawg kawg) | 26 hli (steel) / 28 hli (insulated) |
| Nto tiav | Tua blasted + primer xim | Kub-dip galvanized (Ntau dua lossis sib npaug rau 85μm) | Epoxy txheej + insulated lub tes tsho |
| Yield zog | Ntau dua lossis sib npaug li 690 MPa | Ntau dua lossis sib npaug li 550 MPa | Ntau dua lossis sib npaug li 355 MPa |
| Impact Toughness | 27 J @ -20℃(Charpy V) | 40 J @ -40℃(Charpy V) | 27 J @ -20℃(steel seem) |
| Nyhav ib Teeb | 22 kg (600 hli) / 29 kg (800 mm) | 34 kg (900 hli tapered) | 25 kg (600 hli insulated) |
| Txuj kev ua raws cai | UIC 864, EN 13674-4 | AREMA Ch.4, IRCA Spec. | IEC 61373, EN 50122 |
Railway Fish Phaj: Engineering Application & Inspection Standards
| Cov ntsiab lus thov | Installation Specification | Kev tshuaj xyuas & Kev tu | Failure Criteria |
|---|---|---|---|
| Joint Bar Alignment | Qhov sib txawv tsawg dua los yog sib npaug li 1 mm ntawm qhov kawg ntawm txoj kev tsheb ciav hlau | Feeler gauge check txhua hli | Gap> 3 mm lossis ntsug misalignment |
| Bolt Torque Sequence | Hla - nruj qauv, 300-350 N·m | Ultrasonic bolt nro kuaj txhua xyoo | Torque poob> 15% ntawm thawj zaug |
| Thermal Expansion Zone | Tso cai ± 15 hli rail txav | Kev ntsuas qhov sib txawv raws caij nyoog | Ntses phaj khi rau ntawm rail web |
| Electrified Track Joint | Bonding cable Ntau dua lossis sib npaug li 70 mm² tooj liab | Resistance <0.05 Ω ib leeg | Voltage poob> 5% hla kev sib koom ua ke |
| Welded Rail Breathing Zone | Lubricated contact nto | Kev sib txhuam coefficient xyuas biannally | Galling lossis qaug dab peg pom |
| Fatigue Monitoring | Dye penetrant test txhua 2 xyoos | Crack nrhiav tau ntawm qhov bolts | Kev tawg ntev> 5 mm los ntawm qhov |
| Insulated Joint Integrity | 1000 V megger kuaj tom qab kev teeb tsa | Peb lub hlis twg insulation kuj check | Tsis kam <1 MΩ nyob rau hauv ntub dej |
| Kev tiv thaiv corrosion | Re- roj txhua xyoo (cov cheeb tsam ntug dej hiav txwv) | Txheej adhesion xeem ISO 2409 | Base hlau corrosion> 10% cheeb tsam |
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