Elevator counterweight frame clamping and releasing device

Abstract

The invention discloses an elevator counterweight frame clamping and releasing device. The elevator counterweight frame clamping and releasing device comprises a storage battery, a hydraulic power unit, a clamping and releasing mechanism and a remote operation unit. The hydraulic power unit comprises a direct-current motor, a gear pump, a filter, an overflow valve, a one-way valve, an unloading valve, a pressure relay, an energy accumulator, a magnetic exchange valve, a two-way hydraulic lock, a movement oil cylinder and an oil tank; the clamping and releasing mechanism comprises clamping arms, middle rods, a machine frame, machine frame and clamping arm connecting hinge pins, clamping arm and middle rod connecting hinge pins, middle rod and movement oil cylinder connecting hinge pins and movement oil cylinder piston rod guide sliding blocks; the remote operation unit comprises a remote control transmitter and a remote control receiver. The elevator counterweight frame clamping and releasing device can accomplish self-locking clamping and rapid release of an elevator counterweight frame in an elevator testing tower and meet diversified requirements for the release height of the counterweight frame, and has the advantages that remote operation and rapid release are achieved, the structure is compact, the functions are complete, and safety is high.

Description

technical field [0001] The invention relates to the field of elevator safety device testing, in particular to an elevator counterweight frame clamping and releasing device. Background technique [0002] With the increasing number of elevators produced and used in our country, the safety of elevators has been paid more and more attention. Elevator safety gear, buffers, safety protection circuits and other safety devices are key equipment for safe and reliable operation of elevators, and an important guarantee for the safety of elevator users' lives and property. At present, countries or industries have issued relevant test standards or methods for different elevator safety devices. The elevator safety device test must be carried out in the elevator test tower. For each test, the elevator counterweight frame is lifted to a different specified height and then released, so that the elevator counterweight frame moves freely to test the performance and reliability of the elevator...

AI Technical Summary

Problems solved by technology

[0003] Various types of releasable devices currently available cannot meet the test requirements for the elevator counterweight frame, specifically as follows:

[0004] (1) The electromagnetic adsorption release device can lift objects weighing tens of tons to different heights, and the operation is simple and the release is fast; but in order to generate sufficient adsorption force, a bulky electromagnet and a device for installing the electromagnet are required. Space, the space of the elevator test tower is small, it is impossible to install a huge electromagnet, and it takes a long time for the electromagnet to establish a magnetic field strength sufficient to absorb heavy objects, which is not conducive to multiple tests

[0005] (2) The manually operated releasable device has a simple mechanical structure and occupies a small space; but it cannot clamp and release heavy objects. When the elevator counterweight frame is fully loaded, it weighs more than ten tons. The manually operated releasable device Type devices cannot meet the requirements, and manual operation has problems such as limited operating force and must be operated at close range, which cannot meet the requirements of long-distance remote control operation

[0006] (3) Some other releasable devices can lift heavy objects, but they can only be released through the limit plate at a specified height. If you want to achieve different release heights, you must adjust and install the limit plate each time. It will increase the preparation cycle of each test and reduce the test efficiency

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