Safety device for construction elevator
Many 1, 2, upper and lower limit for safety device 3 TDD, extreme limit 4, buffer spring 5, has threshold position switch, single threshold position switch 7, 6 top and limit switch 8 TDD, enclosure door lock 9, lock line 10, has locks There are a lot of electrical safety protection
When the cage is in an emergency for various reasons during the operation, the driver can press the stop switch at any time, making the cage stop running. The fast stop must be a non-self-restoring safety device, usually installed in the top of the cageConstruction lifter lifting door, protective enclosure door are equipped with electric interlock switch, which can effectively prevent because of hoisting cage or protective enclosure door open it up and running and materials caused by falling, only when the hoisting cage door and protective enclosure fully closed to start running.
1. The governor To prevent the hanging basket construction elevator overspeed or fall and set up a safety device, is divided into a unidirectional and bidirectional type two kinds, the one-way speed limiter can only along the direction hoisting cage falling within the speed limit, two-way speed limiter can up and down along the hoisting cage speed effect on two directions. The speed limit shall be tested for performance in accordance with the prescribed time limit. 2. The buffer spring Buffer spring in spring seat connected to the base frame, so that when hanging cage fall accidents, reduce the impact of the hanging basket, at the same time ensure crane cage and weight drops landed into flexible contact, slow down the hoisting cage and the impact of weight landing. The buffer spring has a cone winding spring and a cylindrical spiral spring. Usually, there are two or three cone coiled springs or four cylindrical coils on the base of each cage.
