SU1391665A1 - Sprinkler head - Google Patents

Description

(21) 4023742 / 28-12

(22) 02/14/86

(46) 04.30.88.BY. (from 16

(71) Karacharovsky Mechanical Plant

(72) I.A. Naturin

(53) 681.37 (088.8)

(56) USSR Author's Certificate No. 1025435, cl. A 62 C 37/08, 1982.

(54) SPRINKLER HEAD

(57) The invention relates to sprinkler heads (SG), can be used as a fire extinguishing agent and allows for increased operational reliability by reducing the number of false alarms. This is ensured by the fact that when the current source is turned on by means of a contact using a step finder, the circuits of each SG are successively closed through the metal graphite paste in the zone of overlap of the plates. Indicators of the indicator in this case will indicate the integrity of the specified layer and the absence of displacement of the lock plates. The absence of current in the circuit will indicate the possibility of violating the integrity of the metallographic paste layer caused by mixing the plates of the heat-sensitive lock and the need to replace the lock or the entire sprinkler head. 4 il.

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The invention relates to sprinkler heads and can be used as a fire extinguishing agent.

The aim of the invention is to increase operational reliability by reducing the number of false readings.

Figure 1 schematically shows a sprinkler head, a general view; FIG. 2 is a view A of FIG. 1; on fig.Z - section bb In fig, 2; Fig. 4 shows a scheme for connecting several sprinkler heads to a measuring instrument or indicator.

The sprinkler head contains a fitting 1 blocked by a valve 2, a spray socket 3 supported by frame A and a locking system for holding the valve consisting of a support 5, an upper 6 and a lower 7 levers fastened with a thermosensitive lock 8. The lock is two layers1 - 9 and 10 (fng.2 and 3), overlapped with the help of a fusible 1I alloy (Fig. 3). A spontaneous displacement control unit containing plates located between the layers of the insulator 12 and 13 (fig. 3) metallograph Paste 1A, having a U-shaped form, one of the ends of which is placed on plate 10, and the other is connected to switching wire 16 with foil 15, which, to form a small overlap, is fixed to frame 4 by a clamp 17 and is equipped with a microtecker at the end 18 for connection to the socket 19 of the station1 of the one-sided wiring 20 (FIG. 4). Thus, each sprinkler head can be connected to an indicator or an instrumentation device 21 containing, for example, a stepping finder 22, a milliammeter 23, a pushing pin 24 and a current source 25.

The device works as follows

. When current source 25 is turned on by contact 24 by means of a step finder 22, the circuits of each sprinkler head are successively closed through metal graphite paste 14 in the overlap area of plates 9 and 10. The readings of milliammeter 23 in this case indicate the integrity of this layer and, therefore, no mixing lock plates.

The absence of current in the circuit of milliammeter 23 indicates a violation of the integrity of the layer of metal graphite paste 14 caused by the relative displacement of the plates 9 and 10 of the heat-sensitive lock 8 and the necessary

replacement of the last or all sprinkler head,

The sprinkler head with thermal lock is designed for automatic fire extinguishing. The head (or some of which is their number) by the fitting 1 is inserted into a water pipe, which is carried out specifically for fire fighting in a room protected from a fire. Finding where with under pressure

In the pipe 0, water is held by the valve 2 and the locking system consisting of the support post 5, BepxHei o 6 and the lower 7 levers, the adjusting screw located in the center of the socket

5 (not shown) and holding the whole mechanical system in a steady, as if in a watchful state of the lock 8.

The lock is the most important

Q TOM to keep the system; s in equilibrium and in case of fire. The lock consists of two plates 9 and 10 (Figures 2 and 3), which are lap-welded with a low-melting Wood alloy. In the event of a fire in a protected room and from an increase in the air temperature 15 or directly from the flame of the lock plate, when heated to a temperature of 72 ° C, it disperses and disintegrates, since the solder joining them melts at the specified temperature. The loosened lock plates violate the previously mechanically stable valve holding system 2 in the closed state. The levers, the lock plates, the valve come out of interconnection, fall to the floor, and the tap water through the open hole begins to flow into the room, but not in a jet, but striking the diffusing socket, disperses by spraying a large area,

In the device, the main role of the controlling body is a thin layer

5 metal graphite conductive paste 14, applied by a thin strip on both plates of the lock and necessarily passing through the border of their spa. For

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Isolating the paste from the metal plates to the plates are also pre-coated as a strip with a thin layer of insulating varnish, then paste, then again a layer of varnish to protect the paste from external exposure. To solder the wires to the paste track, the ends of the paste are applied to strips of brass foil.

The application of metal graphite paste, which overlaps both locking plates in the area of their overlap, makes it possible to obtain a conductive element that is very sensitive to the slightest reciprocal displacement of the plates, which is connected to an indicator or measuring instrument. In this case, since the paste forms in general a figure, the ends of which intersect the overlap zone of the lock plates in two places, the system becomes very sensitive to even the slightest one-sided displacement of the plates. In operation, it is from such one-sided spontaneous displacement of the plates that the emergency disintegration of the lock begins.

Before installing the sprinkler head, an insulating layer of varnish (for example, furniture nitrolak, Tsapon varnish) is applied to the fire protection system on the surface of the lock with a double overlap of the overlap area of the plates, followed by a figure in general form, followed by metal-graphite paste the manufacture of conventional radioresistors of the type MPT and BC), also forming a figure, which after height to protect against external influences, is painted on top with another layer of varnish. At the same time, one end of the paste is placed on the metal plate of the lock, and the other is connected to the switching wire, which with the help of the micro-plug allows you to connect it to the control and measuring device-microammeter or idler. The conductive layer obtained on the surface of the lock is extremely sensitive to the force factors arising from the slightest relative displacement of the plates. So, stretching or breaking

metal graphite paste, coated on both sides with varnish and having a cross section of the order of 0.05-0.02 mm, occurs with the slightest tensile force.

During operation, the locking force from the side of the locking system levers is equal to 650-800 g.

The present invention, without reducing the thermal sensitivity of the lock, allows timely detection of the spontaneous displacement of its plates, usually preceding the emergency disintegration of the lock.

The slightest relative displacement of the lock plates leads to the destruction of the metal graphite paste layer on its surface, as a result of which there is no current in the circuit of the connected measuring device or indicator, which indicates a violation of the relative position of the lock plates and the need to replace the sprinkler head.

The use of the invention makes it possible to work reliably by jTHeH: - the number of false runs.

Formulas

the invention

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A sprinkler head containing a fitting, in the distribution opening of which a valve is located, a sprayer) 1st socket fixed to the fitting, and a locking system for holding the valve, including levers fastened with a thermosensitive lock made in the form of metal plates connected overlaid by a fusible alloy, so that, in order to increase the reliability of work by reducing the number of false attempts, it is equipped with a control unit for the spontaneous displacement of the plates of the heat-sensitive substitute In addition, the junction of metal plates is covered with insulating layers, inside which is placed a sensitive element made in the form of a layer of metallographite paste with terminals for connection with an indicator.

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Claims (1)

Claim A sprinkler head containing a nozzle in the distribution hole of which a valve is located, a spray outlet mounted on the nozzle, and a locking system for holding the valve, including levers fastened by a heat-sensitive lock made in the form of metal plates overlapped by a low-melting alloy, without t and h but with the fact that, in order to increase the reliability of work by reducing the number of false positives, it is equipped with a control unit for spontaneous displacement of the plates of the heat-sensitive lock, this position the joint metal plates covered with insulating layers, inside which is placed a layer formed metal- lografitovoy paste sensor with leads for connection with an indicator. FIG. 4