Elevator crash preventing device

Abstract

The invention discloses an elevator crash preventing device. The elevator crash preventing device comprises a car, a guide rail and a car frame; a car emergency button is arranged on the inner wall of the car; the car frame is provided with a collision bow; limit switches are arranged on the guide rail; a powerful magnet is arranged at the bottom of the car; an iron core is arranged rightly below the powerful magnet; a coil is wound around the iron core; one end of the coil is connected with a power supply, and the other end of the coil is connected with a resistor; the power supply is provided with a power failure signal wireless emitter; one end of the power supply is connected with a resistor; a magnetic pole below the powerful magnet and the iron core are repulsive from a magnetic pole on the upper side under the electrifying condition; the car emergency button or the collision bow touches the limit switches to form a closed circuit; three limit switches are provided; the limit switches and the resistors form parallel circuits; and the power supply is connected with the power failure signal wireless emitter in parallel. The elevator crash preventing device has the following characteristics: when an elevator is broken down, and a safety brake device cannot be started to cause stall of the elevator or lifting equipment, the elevator cannot be crashed due to high-speed fall, and the safety of the elevator and passengers is guaranteed.

Description

technical field [0001] The invention relates to an elevator device, in particular to an elevator crash prevention device. Background technique [0002] When the elevator car or counterweight squats due to control failure, insufficient traction force or brake failure, etc., the buffer will absorb the kinetic energy of the car or counterweight to provide the final protection to ensure the safety of personnel and the elevator structure. Polyurethane buffer is an energy storage type buffer. Because the polyurethane buffer converts the kinetic energy and potential energy of the car or counterweight into elastic potential energy after being impacted. Due to the reaction force of polyurethane, the car or counterweight is buffered and decelerated. Therefore, the characteristic of the polyurethane buffer is that there is a rebound phenomenon after buffering, but there is a disadvantage of the rated speed, so the polyurethane buffer is only suitable for the rated speed below lm / s, a...

AI Technical Summary

Problems solved by technology

The above two kinds of buffers cause the car or the counterweight to stop running downward through contact work, so as to achieve the purpose of stopping; the elevator is a lifting device, so the weight is relatively heavy. When the elevator stalls, the gravity generated is extremely large. Contact interception will cause serious damage to personnel or equipment, or even crash

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