SU91784A1 - Control device for flatbed cargo hoist - Google Patents

Description

The known devices of the electrical control circuit without a cargo hoist for vertical transport of materials (mainly in the construction of multi-storey buildings), when operating with a loading platform and with signaling between the platform and floors, are complex and do not provide adequate safety of work.

The described electrical control circuit helps eliminate these drawbacks by using only one relay to control, the coil of which is connected in parallel to the lamp, giving the operator on the site a signal to perform the working operation on the floor, and the relay contacts are included in the control circuit: by lowering the movable part of the elevator, auxiliary mechanism, installed on this part and carrying out the working operation, as well as into the power supply circuit of the relay and the signal lamp.

The drawing shows the proposed basic scheme for controlling a lifting device (for one floor), in relation to the particular case of a construction hoist that delivers concrete to the floors. Some control circuits that have an auxiliary value are not shown in the diagram.

Lifting device for the proposed scheme works as follows.

On the floor, which needs to be delivered, by pressing the / button on the alarm station, the call lamp 2 of the corresponding floor on the control post at the unloading platform is switched on. The operator of the control station, receiving a signal, establishes a connection with this floor by switching the corresponding switch 5, after which the lamp 4 lights up on the floor. This lamp will light up all the time of communication of this floor with the loading platform. Then the operator, by pressing button 5, turns on contactor 6 and, turning the controller 7 in the direction of lifting, raises the lift to the destination floor, where it automatically stops.

The worker who receives the material on the floor again has button 2, dyuchuk) and now the signal to the operator by the lamp 8 - “overturn,

No. 91784

At the same time, the call lamp 2 lights up. The signal "tilt is possible only on the platform of the elevator on the floor. For this purpose, the power supply circuit of the lamp is A.§1 through the contact of the floor travel switches 9. After the lamp 8 is ignited, the operator presses the button 0, energizes the coil of the magnetic actuator} 1 and the bucket starts to tilt and stop in the limit position.

After unloading the bucket. the worker on the floor presses the J2 button, signaling to the operator by the lamp 13 and giving them permission to install the bucket in a vertical position and lower the elevator. When this happens, the relay 14 is turned on, the coil of which is connected parallel to the lamp 13.

The contacts 15 of the relay 14 are included in the descent control circuit of the magnetic starter 1.6 circuit, drying, setting the bucket to a vertical position, and the circuit supplying the relay 14 and the lamp 13, regardless of the position of the floor button 12. Due to this, the operator can to turn on the engines for lowering and turning the bucket only to the losle of the relay actuation, i.e. obtaining permission from the worker on the floor.

After turning on the lamp 13, i.e. obtaining the permission, the operator presses button 17 and 5, returns the bucket to the normal (vertical) position and lowers the lift.

The lamp 13 is on until the lift occupies the lowermost column. At the same time, the relay 14 is turned off.

After that, the controller tilts the bucket to load the material by pressing button 10, and then using button 17 returns the bucket to the vertical position. An open contact 15 of the relay 14 is shunted in the lower position of the elevator by the section of the switch switch 18.

Further, the above operations are repeated.

When the button 19 on the floors or buttons 20 and 21 is pressed in an emergency way, the line contactor 6 is turned off at the control station and in the engine room, and the elevator stops. At the same time, while the button is pressed, bell 22 rings at the control station.

When re-raising, the bell chain 22 closes with the re-lift switch 23, and the bell rings until the elevator is lowered below the maximum limit.

The control circuit is powered from transformer 24. The circuit provides for maximum relays 25, a series of path and limit switches 26, which limit the movement of the lift, turn the bucket, button 27 "stop and so on.

Subject invention

Claims (2)

1. Scheme of a control unit without a cargo lift for vertical transport, mainly in the construction of multi-storey buildings, when operating from a loading platform and with signaling between the platform and floors, characterized in that, in order to simplify the electrical circuit and ensure safe operation, to control approximately only one relay, the coil of which is connected parallel to the lamp, giving the operator on the site a signal to perform a working operation on the floor (for example, unloading the bucket, etc.), and the contacts are relaying included in the control circuit: descent of the movable part of the lift support mechanism mounted on the movable part of the hoist and carried yuschim said working operation, and also in the chain moiety is carried power relays and Lumley regardless of positions condominium knotski consisting lamp and a relay, in order to enable the operator to control the auxiliary mechanism and the descent of the movable part, only after the relay has been activated. 2. The device according to claim 1, characterized in that the lamp power supply circuit, which serves to signal the operator to perform the operation, is conducted through the contacts of the floor limit switches, in order to provide a signal from the destination floor to the site. movable part of the lift. L- t Mill ± fe ..