Safety buffering and positioning device for arm retracting of double-rocker-arm derrick

• Main Authors: ZHANG PENG, FU XINGWANG, ZHANG QITONG, WEN SHUO, AN HAILIN, LIU TAO, ZHAO YANG
• Format: Patent
• Language: Chinese; English
• Published: 10.06.2022
• Subjects: BLASTING; CRANES; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HAULING; HEATING; HOISTING; LIFTING; LIGHTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SHOCK-ABSORBERS; SPRINGS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

The utility model relates to a safety buffering and positioning device for arm retraction of a double-rocker-arm derrick, which is characterized in that a left polish rod mounting seat and a right polish rod mounting seat are symmetrically mounted on a first mounting plate, polish rods are sleeved on the left polish rod mounting seat and the right polish rod mounting seat, and springs are sleeved on the polish rods; contacts of the starting travel switch and the ending travel switch extend into grooves formed in the polish rod side walls of the left polish rod installation base and the right polish rod, the top ends of the polish rods are jointly connected with a second installation plate, and a starting indicator lamp and an ending indicator lamp are installed at the lower end of the first installation plate. And the starting indicator lamp and the ending indicator lamp are respectively connected with the starting travel switch and the ending travel switch. The device is scientific and reasonable in design,