SU1229788A1 - Fire detector - Google Patents

Abstract

FIELD: fire fighting equipment. The purpose of the invention is to increase the speed of the sensor. When the temperature in the room rises to 72, the low-melting alloy of the sensing elements melts, their plastics are separated and the traverse under the influence of the spring moves together with the permanent magnet towards the adapter to an adjustable stop, against the sensing element. As a result, the contacts of the reed switch under the action of the magnetic field opens, which indicates a fire situation. 4 silt, to from 00 00

Description

The invention relates to fire fighting equipment, in particular to elements of fire-fighting automation used in explosive rooms.

The purpose of the invention is to increase the speed of the sensor for explosion-hazardous premises by reducing its material consumption and, accordingly, the heat capacity.

FIG. 1 shows a fire sensor overall view; in fig. 2-4 - traverses and other parts of the fire sensor.

The fire detector includes a housing 1 and a cover 2 made of plastic. The casing 1 is screwed through the pipe 3, the nut 4 and the adapter 5, and the copper tube 6 is screwed on the opposite side with the plug 7 with the rod 8 attached to it with the nut 9 at the end. On the copper tube 6 and on the rod 8, spring-loaded respectively by springs 10 and 11, two identical crossbars 12 and 13 are worn, made on the sides with a slot 14 and a hole 15. Two sensitive elements 16, each made in the form of a pair of spring-loaded plates brazed on one ends, the other T-ends, are fixed in the holes 15. A permanent magnet 17 is attached to the crosspiece 13. A adapter 18, mounted on the reed switch, abutting the spring 19, is mounted into the adapter 5 and simultaneously into the axial hole of the copper tube 6. Limited Teleconference and magnitude regulator crosshead 13, with open-loop sensor 16 serves as an adjustable stop 20, HA vinchenny a copper tube 6. The permanent magnet 17 fastened by a nut 21.

The sensor works as follows.

In case the temperature in the room rises to 72 ° C, the low-melting alloy of the sensitive elements 16 melt

their plates are disconnected and the yoke 13 under the action of the spring 10 moves together with the permanent magnet 17 towards the adapter 5 to the adjustable stop 20, facing the sensing element 18. As a result, the contacts of the reed switch 18 under the action of a magnetic field the magnet 17 is damped and a fire signal is output from the sensor output.

Claims (1)

Formula iso rete n i A fire detector containing the first sensing element, a housing with a lid, a copper tube, one end of which is fixed in the housing and located coaxially with the housing and a clamp, at the other end of the copper tube is placed one End of the stub, characterized in that in order to boost the speed of the sensor by reduce its material consumption, an adjustable stop, a permanent magnet, the first and second cross bar of the dielectric, the second and third sensitive elements, a spring, the first sensitive element is made on the reed switch, the plug is inserted into it. an end stop is provided between its ends, an adjustable stop is placed on the copper tube in outer diameter, the first crosshead is fixed at the other end of the plug, and the second crosshead is fixed on the outer side of the copper tube, a spring is installed between one end of the second crosshead and the annular ledge of the end cap and the second crosshead is interconnected by the second and third sensitive elements, on the other hand the second crosshead is placed a magnet, with the second crossbar and magnet made with the possibility of moving along the copper tube along its longitudinal axis. № 13 r-JT3 Fkg TTTr - / f figs fig4 Editor I. Derbak Compiled by O. Bogomolov Tehred L.Oleynik Corrector Corrector V. But ha Order 2452/50 Circulation 515 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Razpska emb, d, 4/5 Production and printing company, Uzhgorod, st. Project, 4