119results about How to "Play a driving role" patented technology

Maintenance-friendly, compact valve having a simple design for essentially gastight closing of a flow path between two ports arranged at an angle. A valve part which is arranged in a valve housing so as to be displaceable along an axis and whose closing surface can be brought into contact with a valve seat of the first port for closing the flow path and can be brought out of contact for opening the flow path is in the form of a cylindrical piston having an end face forming the closing surface and a piston outer surface. The valve housing has a cylindrical passage which extends opposite the valve seat along the axis and through which the piston is passed and can be displaced and inside which a sealing or guide element is arranged. The piston and the passage are dimensioned so that the piston outer surface is closely enclosed along the adjustment distance by the sealing or guide element of the passage. It is thus possible for essentially only a single adjustable component of the valve, namely the easily cleanable piston consisting in particular of a single material, to be guided in the flow space so that the maintenance of the valve is substantially simplified and few different materials bound the flow space. In a further development, the drive mechanism of the piston is formed at least partly by an outer piston space between a piston step and the passage, so that the piston forms a component of the drive mechanism, permitting a compact design of the valve.

The invention discloses a cable wear tractioned cavity cleaning device comprising a main shaft. The two ends of the main shaft are respectively provided with a cable connector and a traction connecting head. The main shaft is provided with a support plate, and the circumference of the support plate is provided with rolling wheels. The main shaft is also provided with a cavity cleaning plate which is connected with the main shaft in a sliding manner. The cavity cleaning plate is provided with a driving arm; the driving arm is provided with a driving wheel; the driving wheel is arranged on the side with the exterior edge located outside of the cylindrical face formed during the rotation of the cavity cleaning plate. The invention is mainly used for laying underground power cables. It can not only be applied in large areas but it is also convenient to construct. With the functions of thorough cleaning, it is not easy to be jammed and can run smoothly. At the same time, for different cable pipes, all that needs to do is replace the cavity cleaning plate according to specific requirement, without the need to be equipped with a number of cavity cleaning plates, thus saving construction costs.