SU475646A1 - Device for automatic control of smoke removal system - Google Patents

Description

I

The invention relates to the automation of smoke removal systems and fire alarms in buildings, mainly of high-rise.

The device provides: automatic and remote activation of the smoke exhaust system; fire alarm and various types of malfunctions with its possible transfer to the central fire alarm station.

The known device for automatic control of the smoke removal system, comprising parallelly connected beam kits with series-connected sensors, diodes, control relays and an actuator. Relay, is not convenient enough in operation and leads to a false response of the device to Iozhar with faults (open circuit 1, its wires to which the control relays are connected) due to the lack of control of the power supply line relays and the possibility of remote activation of the smoke exhaust system and enable testing and with the floors.

The purpose of the invention is to increase the reliability and simplify the device.

This is achieved by the fact that the proposed device is equipped with closing and opening .1 buttons, with closing buttons

connected in series with control relays, disconnecting buttons in series with sensors, and control relays and actuating relays connected to the same supply line.

FIG. 1 the beam scheme is presented (the first and the sixteenth beam set); in fig. 2 is a signaling diagram of the proposed device.

The device contains fuses 1 and 2, sensors 3, diodes 4, shunt sensors 3, diode 5 of the control relay, disconnecting button 6, closing button 7, warning light 8 of the beam, electromagnets 9, relay

control 10, the executive relay 11, the closing contacts 12 of the relay control 10, the disconnecting contacts 13 of the relay 10, the switch 14 of the power supply of the beams and alarms, the disconnecting contacts 15 of the executive relay 11, the closing contacts 16 of the executive relay 11, bell 17, button 18, the signal 19 starting the system from the device, contact 20 of the relay for switching on the control room alarm, relay 21 for switching on the fan, intermediate relay 22 for switching off the power of electromagnets, switch for 23 operating modes, relay 24 for switching on the control room alarm system and pulse-pair , The warning lamp 25 triggered beam razmykayusch first contact 26 relay

time, the diodes 27 of the signaling circuit and, the disconnecting contact 28 of the relay 22, the closing contact 29 of the relay 22. The number of rays is determined by the number of controlled floors of the building. The device operates as follows (the operation of the circuit is considered on the example of the first beam set). b the control mode of the rays is transferred using button 7 and switch 14. Previously, all the first relays of the 10 radiation sets are energized, which are activated along the circuit: plus, fuse 1, relay 10, diode 5, button 7, fuse -2, minus . Then the switch 14 is transferred to the on position, the button 7 is released, the relay 10 is set to self-feed through the circuit: plus, fuse 1, relay 10, closing contact 12, sensor contacts 3, button contact 6, second contact 12 of relay 10, switch 14 fuse 2 minus. The circuit goes into control mode and is ready to receive signals, indicated by signal lamp 8. Exceeding the set value of the ambient temperature in the controlled room triggers the sensor (opening the contact, the power supply circuit of the relay 10 is broken, the latter is de-energized and the opening contacts 13 turn on the relay 11 circuits: plus, fuse 1, relay 11, disconnecting contact 13 of relay 10, button 6, diode 4 of the activated sensor, second contact 13 of relay 10, switch 14, fuse 2, minus Relay 11 with its contacts closes the power supply circuit of the electromagnet of the 9-storey valve, turns on the relay 21 (Fig. 2), the relay 24 and the signal lamp 25 of the actuated beam along the circuit: plus, button 18 contact, time relay contact 26, closing relay of the executive relay 11, lamp -25, minus or diode 27, relay 24: minus. Relay 21 issues a command to turn on the fans of the smoke removal system, to shut off the building's external ventilation, to operate the pulse pair. Pulse pair, short-circuit and opening contact 26 in the alarm circuit, allows intermittent fire alarm on the device itself through alternately opens and closes the relay contact 20, 24 duplicates a fire signal to the central fire alarm Lost. Simultaneously with the relay for switching on the fans, through the intermediate relay 22, the power supply to the electromagnets of the floor valves is switched off in order to ensure the calculated operation mode of the ventilation of the smoke removal system. ,: 4 In addition, in order to reduce the inrush currents that occur during the simultaneous start of several electric motors of systems, the relay 22 by means of the delay from the time relay allows the start of the smoke removal fans to be shifted in time. When remotely turning on the smoke removal system from buttons 6 on the floors, the scheme works as in a fire. Breakage of any of the supply wires or beam causes simultaneous disconnection of all control relays 10 and actuating relays I, whose contacts are closed in the circuit of signal lamps 25. The lamps are illuminated with a steady light, indicating a fault, relay 24 and an audible signal are triggered. The open contact 20 of the relay 24 in the dispatch signaling circuit indicates a fault. The device allows the button 19 to remotely turn on smoke exhaust fans from the operator’s workplace through the relay 21 and turn off the general exchange ventilation. When translating switch 23 to position And "Checking by switch 14, the operability of the whole beam circuit and the signaling circuit in the Fire or Fault modes is simultaneously checked. During the testing of the floor plan, the buttons 6 simultaneously check the operation of the smoke removal valves. In this case, the switch 23 is moved to the position 111 "Check. When you press button 7, power is supplied to the control relay 10, and the circuit returns to standby mode. The subject of the invention is a device for automatic control of a smoke exhaust system, comprising parallelly connected beam sets with series-connected sensors, bridged data points, control relays and actuation relays, characterized in that, to simplify the device, it is equipped with closing and opening buttons, with closing buttons connected in series with control relays, disconnecting buttons - in series with sensors, and control relays and executive relays are connected to the same power supply nii.

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