GB/T 26475-2021 in English
VALIDBridge type grab ship unloader
- Issued on:2021-12-31
- Implemented on:2022-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD)：
$430.00
$418.00
$418.00
| Standard No: | GB/T 26475-2021 |
| Document status: | VALID |
| Title in English: | Bridge type grab ship unloader |
| Title in Chinese: | 桥式抓斗卸船机 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2021-12-31 |
| Implemented on: | 2022-07-01 |
| Superseding: |
GB/T 26475-2011 Bridge type grab ship unloader
|
| ICS Classification: | 53.020.99-Other lifting equipment |
| Chinese Classification: | J80-Hoisting machinery |
| Professional Classification: | GB-National Standard |
| Related Keywords: | safety protection system bridge grab ship unloader
bridge type grab ship port ship unloader added ship unloader monitoring |
| Related Topics: | gb t26475 2011
bridge gb/t26475 gbt 26475-2011 GB/T26475-2011 GB/T 26475-2011 gb26475 GB/t+26475 Grab harrier fighter Grab strength GBT26475 GB/T 26475-2011 GB/T 26475-2021 Ship unloader swings Underwater grab |
《GB/T 26475-2021桥式抓斗卸船机》由TC227（全国起重机械标准化技术委员会）归口，TC227SC3（全国起重机械标准化技术委员会桥式和门式起重机分会）执行，主管部门为中国机械工业联合会。
Introduction
Analysis of the key points of standard revision
Main technical changes of GB/T26475-2021 compared with the 2011 version:
- New definitions: Net average productivity (3.3) and average productivity (3.4) and their test methods (6.8)
- Safety enhancement: Added lifting weight limiter alarm interlock (5.4.2.2), double protection of pitch mechanism (5.4.6.2), typhoon prevention measures (5.4.10), etc.
- Intelligent requirements: Added ship unloader monitoring and management system (5.9.2.10) and industrial video surveillance system (5.9.2.13)
Comparison of key technical parameters
| Item | 2011 Edition | 2021 Edition | Description of changes |
|---|---|---|---|
| Definition of rated lifting capacity | Not clearly distinguished | Grab bucket deadweight + material mass (3.2) | More precise definition |
| Anti-wind and anti-slip device | 6.3.9 | 5.4.2.5 | Add typhoon defense requirements |
| Grounding and lightning protection | 6.9.6 | 5.9.6 | Refine the resistance value requirements |
Detailed explanation of core technical requirements
5.4 Safety protection system
Bridge grab ship unloader must be equipped with:
- Triple limit protection: end point deceleration, end point, emergency limit (5.4.2.1)
- Weight monitoring system: 95% alarm, 110% power cut off (5.4.2.2)
- Wind-resistant device: The anchoring device must withstand a wind speed of 55m/s (5.1.4f)
5.9 Electrical equipment innovation
Actual application case: The monitoring and management system configured after the transformation of a port ship unloader achieved the following:
- The tracing time of fault history records was shortened by 80%
- The harmonic interference was reduced to within the GB/T10236 standard
Implementation suggestions
Equipment selection reference
| Productivity (t/h) | Recommended lifting capacity (t) | Applicable ship type |
|---|---|---|
| 400-1000 | 100-250,000 | 30,000 tons or less |
| 1500-3000 | 32-63 | 50,000-100,000 ton level |
Maintenance points
- Wire rope inspection: Measure the diameter reduction every month (5.5.1)
- Coating maintenance: Paint film thickness ≥ 260μm (5.10.2.2)
Sample only — not a preview of GB/T 26475-2021
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