MODEL XQ140/20 HYDRAULIC POWER TONG OPERATION MANUAL
YANCHENG TEDA DRILLING & PRODUCTION EQUIPMENT CO.,LTD
3.2.3 Reset Mechanism (Fig.3-2)
The initial working position of hydraulic power tong refers to the jaw plate frame
and the open gear face the opening of the shell body of the master tong, the jaw plate
frame of the back-up tong faces the opening of backup tong main body. The openings
of master and backup tongs should be in alignment. After one making-up and
breaking-out operation ends, operate the hand control valve in the opposite direction
to return the hydraulic power tong to its initial working position, allowing the pipe
string in or out through the tong opening smoothly. During making-up and
breaking-out, reset knobs on the master and backup tongs should be in the same
direction.
1.jaw plate frame 2.die seat 3.dies 4.ramp
plate 5.jaw plate 6.roller axle 7.roller 8.cone
point fastening screw 9.cylindrical pin
10.screw stopper11.hexagon socket head screw
12.positioning screw
Fig.3-3 A-A Cutaway View of Tong Head
Assembly
3.2. Centralizing Mechanism (Fig.2 and Fig.4)
The centralizing mechanism centralizes from up and down, inside and outside. It
consists of roller support frame, centralizing roller, centralizing roller axle and roller,
which are respectively installed on the shell body and the cover of the tong head.
They match the open gear and the groove on the cover of the open gear to guarantee
the open gear turns along the original axle central line to avoid deflection and axial
running-out, thus the tong head is centralized.
Fig.3-4 Tong Head Assembly C-Side View
1.pin shaft
2.roller
3.cotter pin
To Next Page
Loading...