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带有耐用牙板的КТНД型新式管钳,是改进了结构,用来在修井时上卸油管及其接箍的。在安装与拆卸深井泵时,该管钳也能用于上卸活塞杆和光杆接头。在矿场的各种修理工作中亦可用它。管钳(如图)由两个基本部分组成:用绞链联结起来的手柄1和颚板3。用弹簧力使管钳咬住管子,该弹簧一端固定在颚板3上,一端固定在铰销2上。旋转铰销可以调节弹簧拉力,当调到所需弹簧力时,用螺钉9顶死铰销2。为方便工作,装有手把5,它同时也是防止牙板4窜动的止动螺钉。
The new КТНД pipe wrench with a durable dental plate is an improvement over the structure used to unload tubing and couplings during workover. The pipe wrench can also be used to unload the piston rod and polished rod connector when installing and removing a deep well pump. It is also available for various repairs at the mine. The pipe wrench (pictured) consists of two basic parts: the handle 1 and the jaw 3 joined together by hinges. A pipe clamp is used to bite the pipe by spring force. One end of the spring is fixed on the jaw plate 3 and the other end is fixed on the hinge pin 2. The swivel hinge pin adjusts the spring tension, and when the required spring force is adjusted, the hinge pin 2 is stopped by the screw 9. For the convenience of work, equipped with a handle 5, it is also a stop screw to prevent the disc 4 movement.