SU54355A1 - Fire Alarm Device - Google Patents

Description

The present invention relates to a fire alarm and is intended to simplify existing devices. As is well known, in existing loop systems, controllers, perforators and the like devices are used in the receiving apparatus for receiving signals, while in ray systems in which optical signaling by lamps is used, beam relays are used. According to the invention, in order to eliminate these devices and to perform a receiving device with optical signaling and lines through the loop system, the electromagnetic switchboard switches (registers) with manual return of the contacts to the initial position are included in the receiver.

Application of these registers as. it was indicated that it allows the GERI detector switching system to remove expensive and critical equipment, such as rotary hammers and controllers, from the receiver. Receiving a signal of a fire is noted at the receiving device by general optical and acoustic signals. The number of the fire alarm signal registers

with optical indicators (two lamps in parallel). Damage to the line is marked on the receiving device with optical signals characterizing the damage, as well as an acoustic signal - RING. Damage.

The invention is explained in the drawing: com., Depicting a schematic diagram of the apparatus.

The receiver operates on a constant current. In the drawing, the diagram is shown in the normal state.

All devices in the diagram are shown in the position corresponding to the presence of the apparatus under current in the good condition of the loop. In the linear circuit, the control current passes from-), milliammeter Lr linear relay I, fuse, loop with detectors, fuse, linear relay II, milliammeter A,., Closed contact 5, -LB. With contacts G and P of linear relays I and II, the auxiliary relays a and b are closed. With contact a and b of the latter, the control relay 2 is disconnected from the loop. All other circuits of the apparatus in this position are crushed. The normal state of the loop is fixed

the indication of -milliamperers And n Lz presence of current in the loop.

The operation of the device in various cases is as follows.

1. Control of damage in the loop. 1. Open loop.

At. the break in the loop is linear; the device remains without current, and, consequently, linear relays I and II release their measles. In this case, the auxiliary relays open and release their measles, which leads to the opening of the control relay 2, which by its contact 2 disconnects the earth relay 5 from the midpoint of the battery and connects the ground to it. The contacts a, a and v-relays a and s include the optical signal lamps of the CCTV, VOZ) ASC and the relay contact on - the emergency alarm tap. The circuit signal l.mp and call receives power through the contacts 4, 5 relays 4 p 5,

Turns off the emergency call by switching the switch / Cj. When the damage is corrected, the circuit is automatically restored to its normal position. The presence of a break in the loop does not prevent the reception of an alarm.

2. Grounding.

Grounding in the loop can be different in magnitude of the leakage current:

a) at a leakage current of no more than 20 / lA, except for a linear circuit closed in the normal position of the circuit, it closes from the grounding of the loop ground second circuit from the midpoint of the battery LB, through a milliammeter A, ground relay 3, a closed key contact ground, grounding in the loop and in parallel along two branches of the loop through the linear relays I and I}. and - LB. The leakage can be judged by the reading of a milliammeter Lz,

b) when the leakage current exceeds 20 / lA, the earth relay 5 is triggered. At the same time, it switches its winding from the middle point of the battery to its - LB with its own contact -3; the right branch of the loop due to the opening of contact 3 is disconnected from the LB and through the closed

pin 5 is connected parallel to the left branch of the loop.

Contacts 5 and 5 of relay 3 thus turn on the optical signaling lamps of the CPP and WAL and the emergency alarm signaling signal. After correcting the damage, the circuit is automatically restored to its normal position.

The presence of zagugeny in the loop does not prevent the alarm.

3. Breakage with grounding plume of the right branch.

When the loop is broken, as mentioned above, the relay .2 opens - and in pin 2 it disconnects the earth relay 5 from the midpoint of the battery and connects the earth to it. In this case, the relay I will be without current, and the relay II under current. As a result, the auxiliary relay a circuit is opened at the contact / and through the terminals a- and a will be switched on the warning lamps of the VOS WODI the bell of the ACM. When repairing the damage, the circuit automatically returns to its normal position. The presence of this damage in the loop does not prevent the alarm from being received.

4. Break the grounding of the loop of the left branch.

This type of damage is no different from the previous type of damage, only then instead of the signal lamp of the CCL, the CCR warning lamp turns on. 5. Short circuit

plume.

A short circuit in the line of the loop does not cause any switchings in the circuit of the device, it is noted by some increase in the linear current strength (read by milliammeters AI and L.,) k does not affect the correctness of the fire signal reception. A short-circuited detector is detected when a fire signal is sent from it (see below).

6. Breakage and grounding at both ends.

There may be two cases:

a) when the ground resistance between the two broken ends is too small; this case equates to grounding (see clause 2);

b) when the grounding resistance is too high; this case equates to a break (see clause I). II. Receive a signal about the fire.

When a fire signal is sent from any detector, the typical wheel of this detector produces a series of trips and subsequent short-circuits with simultaneous grounding of the linear circuit. The number of trips and closures corresponds for each detector to its serial number and is set by the number of insulating gaps of a typical wheel. As soon as the typical wheel of the fire alarm signaling element begins to rotate, the ground conductor is connected to the loopback with the first conductive plate. In this case, the earth relay 3 triggers the switching of the loop from - L5 to .-} - L B. A further rotation of the typical wheel will alternately open, then close and simultaneously ground the loop.

At each opening of the loop, the linear relays I and II will release their measles and open the circuits of the auxiliary quince relays, which, in turn, turn off relay 2 at contacts a to v, and contacts a. v3 turn on relays 4 and 5. Relays 2, - and 5 are slow to release, so that during the opening time of the linear relays, they do not have time to release their measles.

Thus, the measles of these relays will be attracted during the sending of signals from the detectors. In this case, the electromagnets and Yao registers will receive impulses through contacts 6, 7 of relay 5 and /, closed as a result of closing contacts 4, 5 and c, b, and will move their brushes according to the number of impulses received from the detector. Thus, after giving the signal, the brushes of the registers will turn out to be one of twenty five lamellas, in accordance with the sent signal.

When the signal is sent, the contacts in the detector will return to the initial alarm (that is, the line will be closed and the ground will be disconnected from the loop). At the same time, the linear relays I and II and the auxiliary relays a and 5 will be energized, the earth relay 5 and the relay 6 and 7 will be without current, the relay 2 will be energized.

The grounded 4 to 5 relays release their measles and power the signal lamp indicating the number from which the signal was received. At the same time, the general warning lamp, fire FAT and alarm signaling of the ATL (via contacts 4, 5 relays 4, 5) are turned on. After receiving the signal, the register brushes are manually set to zero lamellae, and the device circuit comes to normal co. stand as shown in. drawing.

The reception of signals during the above damage is mainly the same as the previous case, but with some differences for each type of line damage. Reception of signals for each case of damage to sen from the circuit and the detailed description does not need.

The subject matter of the invention.

A fire alarm device, characterized in that, in order to perform a receiving apparatus with optical signaling when performing a line through a stub system, without the use of rotary hammers, controllers, beam relays, etc., the following are included in the receiving apparatus: registers) with manual return of contacts in. initial position.

to the author's testimony of L. N. Pesikov

No. 54355