Winch on-off machine used for starting vertical lifting civil defense door

Abstract

The invention relates to a winch on-off machine used for starting a vertical lifting civil defense door, and belongs to the field of hoisting equipment. The winch on-off machine used for starting the vertical lifting civil defense door comprises a left roll device, a right roll device, a manual clutch protecting device, a lifting motor, an alternating current brake, a speed regulator, a speed reducer, transmission shafts, a rigid coupler, a combined type stroke measurement and controlling device, pinions, low-speed end safe protecting devices, big gears and a hand rocking device, wherein one end of the speed reducer is provided with the transmission shafts in a penetrating mode; the multiple transmission shafts are connected into a whole axially through the rigid coupler; the pinions are arranged at the two ends of each transmission shaft and are engaged with the big gears; the big gears are connected with the left roll device and the right roll device respectively; one sides of the big gears are provided with the low-speed end safe protecting devices; and the manual clutch protecting device, the lifting motor, the alternating current brake, the speed regulator and the hand rocking device are axially arranged at the other end of the speed reducer. The winch on-off machine used for starting the vertical lifting civil defense door is safe in operation, free of a desynchrony problem and applicable to a large-span and large-size structure.

Description

technical field [0001] The invention relates to a hoist opening and closing mechanism, in particular to a hoist opening and closing device for starting vertically lifting air defense doors, belonging to the field of hoisting equipment. Background technique [0002] The existing anti-flood doors have the following requirements for the lifting mechanism: in an emergency, the anti-flood door can be reliably closed or opened through remote or on-site control; The anti-flood door is reliably closed or opened. Therefore, the safety and reliability of the lifting mechanism of the anti-flooding door is the key technical requirement of the lifting mechanism. The existing opening and closing mechanism is usually lifted by two hoists, and the synchronous shaft is used in the middle to realize rigid synchronization. The local and remote control can be realized through electrical control. The characteristics of this scheme are as follows: it can realize emergency opening and closing whe...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is: when starting, there are brake motors on both sides, and the brakes cannot be opened at the same time. When starting, because one side has released the brake and the load is started, while the other side has not opened the brake in time, the overload will cause the motor to burn out or synchronously twist off. In some cases, there are potential safety hazards, so that the anti-flood door cannot be opened or closed in an emergency; in the case of power failure, the anti-flood door cannot be opened manually on site; even if the anti-flood door needs to be closed urgently in the case of power failure, On site, the braking motor brakes on both sides can be opened manually, but after the release, the anti-flood door will fall in a state of free fall, which will smash the bottom sill of the gate; after the anti-flood door is lifted, it may take a long time to lock the anti-flood door The door lock is braked by the lifting motor, and there is only one safety locking protection, and there is no redundant safety protection device in case of special circumstances; it is difficult to install a rotary encoder, and it is difficult to realize arbitrary preset of lifting height, local and remote Dynamically observe the lifting height of the anti-flood door; it cannot meet the requirements of the large-span and large-size lifting mechanism for the anti-flood door

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