PH type extension ring is a commonly used connecting fitting in power fittings, mainly used to extend the length of insulator strings or fitting strings and transmit mechanical loads.

Its product usage can be summarized as:

1. Extend the length of the insulator string in transmission lines. When the length of the insulator string is insufficient, use a PH type extension ring to extend it to meet the insulation distance or installation space requirements.  

2. The connecting hardware string is used to connect different hardware (such as bowl head hanging plates, ball head hanging rings, tension clamps, etc.), so that the hardware string forms a complete mechanical connection system.  

3. Adjust the installation distance between the tower cross arm and the insulator string, and adjust the installation position by extending the ring to ensure that the wire suspension point meets the design requirements.  

4. The tension string and suspension string of transmission lines are widely used in the tension string, suspension string, and jumper string of 110kV, 220kV, 500kV and other transmission lines.  

5. Improve the flexibility and versatility of hardware strings. The structure is simple and the connection is reliable, and different lengths of hardware strings can be combined according to engineering needs.