In the construction of long-distance pipe jacking by horizontal directional drilling rigs, the relay room assembly is placed at regular intervals to reduce the long-distance and large-tonnage jacking force in stages, and reduce the jacking force of the main jacking cylinder and the bearing force of the backrest of the working well. The oil cylinder seals are sealed with high polyurethane, which has high pressure resistance, excellent wear resistance and good sealing performance. Multi-interface, and can realize linkage with the machine head.
The horizontal directional drilling rig is controlled by a single pump to realize two different speeds of cylinder expansion and contraction. The pumping station adopts the form of double pumps and double motors, with high pressure, large flow and convenient maintenance. To realize the mutual integration work in the pipe jacking construction process, it is completely controlled by the operator of the pipe jacking machine on the control console of the horizontal directional drilling rig. The control console has a display screen to display the work progress of the drill bit. The main jack pump station and the main jack cylinder of the horizontal directional drilling rig are an indispensable part of the pipe jacking construction, which provides sufficient propulsion for the nose and the pipeline.
Before running the horizontal directional drilling rig, you should read the instructions provided by the manufacturer to make sure that the layout, performance and purpose of the main components are clear. It is necessary to carefully check the large cutter head of the reducer, the reducer oil and the gear of the screw machine. Gear oil, and add lubricating oil in strict accordance with the specifications and models required by the manual, and replace it regularly.
Precautions for the use of horizontal directional drilling rigs
The horizontal directional drilling rig should control the position of the pile according to the data given by the design when measuring and laying out the line. When the pipe jacking line pile is set, the center line should be released, and a mark should be made after the setting is completed. In order to lay the construction line, the exact position and size of the sending pit and receiving pit should be carefully inspected.
After the horizontal directional drilling rig arrives at the construction site, check the hydraulic oil in the oil tank first. If the hydraulic oil is not enough, use an electric oil filter to add oil and add it to the specified scale as required. After refueling, the hydraulic oil in the oil tank must be repeatedly filtered through the oil filter. Generally, the filtering time of hydraulic oil in the entire tank should not be less than 24 hours. In addition, after each section of the pipeline is completed, it is also required to carry out at least 12 hours of circulating filtration on the hydraulic oil tank.
