At a heat exchanger maintenance site, when the tube bundle first starts to move, the operator needs a clear view of the relative movement between the tube sheet and the shell. As the bundle is gradually withdrawn, more of its weight is supported by the extractor, and the loading at the front and rear of the equipment changes accordingly. Jingchen’s diesel tube bundle extractor brings pulling, clamping, hanger lifting and front-to-rear balance adjustment together on a single wireless remote controller. This allows the operator to choose a position with a clear line of sight within the designated work area while monitoring the movement of both the bundle and the equipment.
Fast and slow pulling are controlled separately.
The fast-winch and slow-winch toggles on the left side of the panel are each marked for front and rear movement. As the tube bundle approaches its final position during reinsertion, the gap between the tube sheet and the shell flange becomes progressively smaller, so the operator needs to pay closer attention to each increment of travel. Slow-speed control makes it easier to observe changes in this gap and fine-tune the axial position of the tube bundle.
The left and right sides can be adjusted independently.
In the middle of the panel, separate toggles are provided for the left and right clamping mechanisms and for the left and right slings. The clamping controls are marked “Out” and “In,” while the sling controls are marked “Front” and “Rear.” When aligning the equipment with the heat exchanger, the operator can adjust the relevant side independently according to the actual position on each side.
Hanger lifting and front-to-rear leveling serve different purposes.
The two toggles on the right side of the panel control frame lifting and front-to-rear balance. The first adjusts the hanger height, while the second adjusts the longitudinal attitude of the machine. As the tube bundle moves onto the main beam, the combined center of gravity of the equipment and bundle shifts. Even when the lifting height remains unchanged, a height difference may develop between the front and rear ends of the main beam. The dedicated front-to-rear balance control is designed specifically to address these changes in load position during extraction and reinsertion.
