3results about How to "Fast stretching" patented technology

The application discloses a tunneling machine and a propelling hydraulic system thereof, comprising a first oil cylinder, a second oil cylinder and a third oil cylinder, and further comprising: a propelling oil supply system for oil supply in a propelling operation mode; an assembling oil supply system for oil supply in an assembling operation mode; and an operation mode switching valve group connected with each oil cylinder and the propelling oil supply system and the assembling oil supply system respectively and used for switching between the propelling operation mode and the assembling operation mode, wherein in the propelling operation mode, the propelling oil supply system supplies oil to all the oil cylinders to obtain greater propelling force, and in the assembling operation mode, the assembling mode oil supply system supplies oil to only two oil cylinders distributed on both sides of a group of oil cylinders, and an oil cylinder arranged in the middle follows to obtain a faster oil cylinder extension and retraction speed. The application improves the oil cylinder extension and retraction speed in the assembling mode without increasing the specification of the hydraulic pump, thereby improving the economy and operation efficiency of the system and making the force on the shoe bottom more balanced.

The utility model discloses an inclined shaft car catching device, including the lifting frame and be used for lifting the first steel wire rope of lifting frame, still include support, telescopic cylinder, baffle, angle steel stand and second steel wire rope. Lifting frame is walked up and down along angle steel stand through gyro wheel. The cylinder body of telescopic cylinder is fixed on the support, and its piston rod end installs the movable pulley, still is installed with the trolley wheel between located telescopic cylinder and lifting frame on the support. One end of first steel wire rope is fixedly connected with the support, and the other end is fixedly connected with lifting frame after passing movable pulley and trolley wheel in proper order. The utility model discloses using telescopic cylinder, trolley wheel and movable pulley cooperation, and the actual moving speed of lifting frame is two times of telescopic cylinder speed, and has improved work efficiency, and still has little impact and other advantages.