Discussion on the inspection method of the upward

Discussion on the inspection method of the upward overspeed protection device of the elevator car

discussion on the inspection method of the upward overspeed protection device of the elevator car

safety code for elevator manufacturing and installation GB7588-2003 (hereinafter referred to as the code) stipulates that the upward overspeed protection device of the elevator car should be installed on the traction drive elevator; At the same time, the specific technical requirements of the device are also made. At present, the car up overspeed protection device has been widely used in traction elevators. It has a wide variety and different structures, and everyone has different understanding of the requirements of standard technical terms and inspection methods, which brings a lot of inconvenience to the inspectors in the field inspection. Combined with the working practice, the author gives some views on the technical requirements and inspection methods of the device

1 configuration of uplink overspeed protection device

and enjoys independent intellectual property rights. The uplink overspeed protection device includes speed monitoring elements and deceleration elements. So remember to be careful when choosing. Speed monitoring elements can be speed limiters or equivalent devices, such as photoelectric encoders installed at the shaft end of motors. The deceleration elements can be safety gear, rope gripper, brake acting on the traction wheel or the traction axle closest to the traction wheel, and the printed structure also has micro holes that are difficult to obtain by conventional 3D printing (commonly used in traction elevators without gears to start the experiment). At the same time, an electrical safety device complying with the provisions of article 14.1.2 of the specification shall also be configured. When the deceleration element acts, the electrical safety device shall act

2 requirements for the action speed of the uplink overspeed protection device

the specification requires that the lower limit of the action speed of the uplink overspeed protection is 1.15% of the rated speed of the elevator, and the upper limit of the action speed should be greater than the action speed of the speed governor of the car safety gear, but not more than 10%. Therefore, check the action speed commissioning report of the uplink overspeed protection device and compare it with the action speed of the speed governor of the car safety gear. At the same time, the type test copy of the uplink overspeed protection device should also be checked