GB/T 4056-2019 in English
VALIDDimensions of ball and socket couplings of string insulator units
- Issued on:2019-12-10
- Implemented on:2020-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
$534.00
| Standard No: | GB/T 4056-2019 |
| Document status: | VALID |
| Title in English: | Dimensions of ball and socket couplings of string insulator units |
| Title in Chinese: | 绝缘子串元件的球窝联接尺寸 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2019-12-10 |
| Implemented on: | 2020-07-01 |
| Superseding: |
GB/T 4056-2008 Ball and socket coupling dimensions of string insulator units
|
| ICS Classification: | 29.080.10-Insulators |
| Chinese Classification: | K48-Insulator |
| Professional Classification: | GB-National Standard |
| Related Keywords: | ball diameter stop gauge
ball diameter key technical parameters connection mark foot ball diameter d2 double-foot ball 28-type foot ball |
| Related Topics: | Molecular size of pyrene
insulator chemical tandem sphere size Nitrogen series linear series tandem peaking pixel size GBT4056 GB/T 4056-1994 GB/T 4056-2008 GB/T 4056-2019 Polymer spherulite size Composite insulator string naming hinge ball gb/t4056 gb/t 4056 gb 4056 |
《GB/T 4056-2019绝缘子串元件的球窝联接尺寸》由TC80（全国绝缘子标准化技术委员会）归口，主管部门为中国电器工业协会。
Introduction
Interpretation of the core content of the standard
This standard replaces GB/T 4056-2008 and adopts the IEC 60120:1984 international standard. It mainly regulates the ball and socket connection dimension system of disc-shaped and long-rod insulator string components. The 36/40 connection mark is added, and the locking pin matching requirements are strengthened.
Comparison of key technical parameters
| Connection mark | Foot ball diameter d2(mm) | Cap socket entrance D1(mm) | Allowable inclination angle β(°) | Locking pin type |
|---|---|---|---|---|
| 16A | 33.3-34.5 | 19.2+1.6 | 9.5 | W/R type |
| 28 | 57.0-1.9 | 32.0+2.9 | 9.0 | R type |
| 40(new) | 81.0-2.1 | 44.0+3.3 | 7.0 | R type |
Key points for key dimension control
Football inspection specifications
Five major gauges are required:
- Ball height-rod diameter-rod length through gauge (Table B.1)
- Ball diameter go gauge (Table B.2)
- Ball height stop gauge (Table B.3)
- Ball diameter stop gauge (Table B.4)
- Rod diameter stop gauge (Table B.5)
Example: The rod diameter d1 of a 28-type foot ball must meet the 27.5mm stop gauge test and fails (tolerance 29.0-1.5mm)
Implementation suggestions
Gauge management requirements
- The wear limit value of the go gauge can be found in the "Wear Limit" column of each table (e.g., if the 11-type connection go gauge D1≤12.500mm, it will be scrapped)
- It is recommended to use HRC62-63 hardness steel to manufacture gauges, with a surface roughness of Ra＜4μm
Assembly gap control
According to the requirements of Table 5:
- The Dd1 gap of type 20 connection should be controlled within 2.0-5.4mm
- The minimum Q value is 1.8mm when the W-type pin is matched (1.5mm for the R-type pin)
Technology evolution analysis
Main improvements compared to the 2008 version:
- Add 36/40 large-size connection marks to meet the needs of UHV lines
- Refine the matching dimensions of the locking pin (refer to GB/T 25318-2019)
- Supplement the h4 size requirements of the double-foot ball (Table 4)
- Improve the gauge wear limit marking system
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