RU49321U1 - FIRE DETECTOR HOUSING WITH PROTECTIVE SCREEN - Google Patents

Abstract

The utility model relates to fire fighting equipment and is designed to detect scattered radiation due to smoke in enclosed spaces. The technical result of the claimed utility model is to increase the manufacturability of production, reduce costs and increase productivity. The case of the firefighter detector with a protective screen is made with smoke intake windows, delimited by partitions, and holes for control elements, a smoke detector with an optoelectronic pair, a board with electronic elements, an indicator, pin contacts are installed inside it, and the protective screen installed inside the case is made in the form of flat jumpers between two parallel rings, one of which is elastically connected to the plate of the pusher lever for testing the fire detector, and the pin contacts are fixed they board a board with electronic elements to the base inside the case and protrude on the other side of the base to connect a mating outlet.

Description

The utility model relates to fire fighting equipment, namely, fire alarm, and is designed to detect scattered radiation due to smoke in enclosed spaces.

Known smoke detector and insect screen, described in US patent 6,522,254, (publ. February 18, 2003), and comprising a body made in the form of a body of revolution limited by a rounded end surface and a side surface with smoke-sampling windows delimited by partitions, inside of which a board with electronic elements and a smoke detector with an optoelectronic pair is installed, and the protective shield is located around the smoke detector with an optoelectronic pair and is formed of soft fiber having a mesh structure, with the possibility of bev- erages repellent against insects.

However, the placement of such a protective screen requires cutting, molding, connecting the protective screen (for example, a metal mesh) and fastening around the smoke detector with an optoelectronic pair, which reduces the manufacturability of production, increases the cost of operation, due to more frequent maintenance (for example, applying repellent impregnation from insects) and reduces the service life in a metrologically sound condition, since when insect repellent is impregnated, repellent particles may enter the smoke detector with optoelectronic pair.

Known fire detector housing "Aurora", produced by JSC "Argust-Spectrum" (Russia, 197342, St. Petersburg, St. Serdobolskaya, 65), comprising a fire detector housing, made in the form of a body of revolution, limited to the end surface and side surface with smoke sampling windows, delimited by partitions, inside of which there is a base with a board with electronic elements fixed to it by pin contacts, in which a smoke detector with an optoelectronic pair is made with labyrinth cavities for dust collection with Szczytno screen.

However, the implementation of a smoke detector with an optoelectronic pair and labyrinth cavities for dust collection with a protective screen complicates the design of the fire detector, and placing a protective screen between the labyrinth cavities for dust collection outside the smoke intake windows requires more frequent and careful maintenance (for example, removing accumulated dust and insects from dust collectors). In addition, a protective screen mounted at a certain angle to the horizontally ventilated

a smoke detector with an optoelectronic pair, prevents the optimal distribution of smoke flows within the body of the fire detector, which reduces its reliability.

The authors were faced with the task of developing a technological body of a fire detector with an optimal distribution of smoke fluxes inside it and a protective screen that prevents the penetration of foreign bodies, such as insects, into the smoke sensor and ensures free penetration of smoke, as well as reducing the cost of the fire detector's product.

The problem is solved by the fact that the proposed fire detector housing with a protective screen, made in the form of a body of revolution, bounded by the end surface and the side surface with smoke sampling windows, delimited by partitions, and holes for control elements, inside of which a smoke detector with optoelectronic pair is mounted on the base, board with electronic elements, indicator, pin contacts.

New is that the protective screen installed inside the housing is made in the form of flat jumpers between two parallel rings, one of which is made with an external chamfer for interfacing with the sides of the smoke intake windows at the end surface, and the other ring, mating with the opposite sides of the smoke intake windows, - flat with slots corresponding to the width of the partitions, in which the jumpers with latches are not connected to the flat ring, the flat ring being elastically connected to the lever plate for protruding above the housing with On the other side, through one of the openings for the pusher control elements, which contacts the return contact plate electrically connected on the circuit board with electronic elements and pin contacts, which fix the circuit with electronic elements to the base inside the case and protrude on the other side of the base for connecting the response socket .

The technical result of the claimed utility model is to increase the manufacturability of the fire detector housing with a protective shield by improving the quality and increasing its service life in a metrologically sound condition by optimizing the distribution of smoke fluxes inside the housing, as well as reducing costs and increasing labor productivity by eliminating operations cutting, molding and joining a protective shield (for example, a metal mesh or soft fiber having a mesh structure). In addition, the molding of the protective shield made of plastic and its design features ensured the replacement of the test button installed in the detector housing

firefighter with a protective screen, on the pusher, which allowed to simplify the installation technology, reduce costs. With minor modifications, it is possible to modernize the existing protective screens for other modifications of the body of fire detectors, optimizing the distribution of smoke fluxes inside the body and simplifying the existing production technology of the product.

Figure 1 presents a General view of the body of the fire detector with a protective screen in section; figure 2 is a view of the body of the fire detector from the inside without a protective screen; figure 3 is a General view of the protective screen; figure 4 is a cross-sectional view of a jumper with a latch of a protective screen; figure 5 is a board for installing electronic elements, an indicator, a reciprocal contact plate, a smoke detector with an optoelectronic pair; 6 is a bottom view of the base of the fire detector with a protective screen.

The device comprises: a housing 1 of a fire detector (Fig. 1), molded from plastic, for example, of impact-resistant polystyrene, and made in the form of a body of revolution, limited by an end surface 2 and a side surface 3 with smoke-sampling windows 4, delimited by partitions 5, and holes 6 , 7 (FIG. 2) for control elements, on the inner surface of which there are elastic latches 8 and diametrically located guides 9, 10 directed at right angles to the base 11 fixed by them. Inside the housing 1 (FIG. 1), the base 11 is installed a horizontally ventilated smoke detector 12 with an optoelectronic pair (respectively, an optical transmitter 13 and an optical receiver 14), a board 15c with electronic elements (not shown in Fig.), an indicator 16, pin contacts 17 made of an electrically conductive material, with threads for fastening with nuts (not shown in Fig.) boards 15 with electronic elements to the base 11. The protective screen 18 (Figs. 1, 3, 4) installed inside the housing 1 is made in the form of flat jumpers 19 (Fig. 3) between two parallel rings 20 , 21, one of which is to the face 20 is made with an external chamfer 22 for interfacing with the sides of the smoke intake windows 4 (FIGS. 1, 2) at the end surface 2 of the housing 1 (FIG. 1), and the other ring 21 (FIG. 3), mating with the opposite sides of the smoke intake windows 4 (figure 1, 2), flat with the corresponding width of the partitions 5 slots 23 (figure 3), in which the jumpers with latches 24 (figure 3, 4) are not connected with a flat ring 21 (figure 3), and flat the ring 21 is elastically connected to the lever plate 25 for protruding above the housing 1 from the outside (in FIG. not shown) through the hole 6 (figure 2) of the pusher 26, which is in reverse contact with the reciprocal contact normally open plate 27 (figure 5), placed on the board 15 and electrically connected to the electronic elements and pin contacts 17 (figure 1 ),

fixing the circuit board 15c with electronic elements to the base 11 inside the housing 1 through the holes 28 (Fig. 5), and protruding from the other side of the base 11 for connecting a mating outlet (not shown in Fig.). At the same time, on the basis of 11 (FIG. 6), holes 29 are made for elastic latches 8, through holes associated with struts (not shown in FIG.) For mounting and fastening with pin contacts 17 that provide electrical connection, boards 15 with electronic elements, an indicator 16 and electrically connected with it by the optical transmitter 13 and the optical receiver 14 located in the smoke detector 12, and on the side surface guide grooves 30, 31 (FIG. 6) corresponding to the guides 9, 10 (FIG. 2) on the inner side surface housing 1.

The assembly of the fire detector is a sequence of operations in which a plastic protective shield 18 is inserted inside the housing 1, so that the pusher 26 enters the hole 6 of the housing 1, while the jumpers with latches 24, located in pairs corresponding to each partition 5 of the smoke intake windows 4, uniformly pressing the flat ring 21, bend to the center of the housing 1, and then snap on the outside of the housing 1 in close proximity on both sides of the partitions 5, pressing the flat ring 21 to the inside the surface of the housing 1, while the outer chamfer 22 of the ring 20 is aligned with the sides of the smoke windows 4 at the end surface 2 of the housing 1. On the basis of 11 pin contacts 17 passing through it with nuts, a board 15 with electronic elements, an indicator 16, a contact plate 27 is installed and latches fixed to it (not shown in FIG.) by a smoke detector 12 (with an optoelectronic pair 13, 14). The housing 1 with the installed protective screen 18 is combined with guides 9, 10 on its inner side surface with the guide grooves 30, 31 of the base 11 and by pressing the elastic latches 8 of the housing 1 are fixed into the holes 29 of the base 11. When pressing the pusher 26 through the lever plate 25, the force is transmitted on the response contact plate 27, which lowers, closing the contact on the board 15 with electronic elements, initiating a test program, the end of which is indicated by the light of the indicator 16, and then pressing the pusher 26 aschaetsya and it returns to its original position.

The proposed utility model is technologically advanced in production, its assembly does not require much time and high qualification of the employee and guarantees high quality of the product.

Claims (1)

The body of the fire detector with a protective screen, made in the form of a body of revolution, bounded by the end surface and the side surface with smoke sampling windows, delimited by partitions, and openings for control elements, inside of which a smoke detector with an optoelectronic pair, a board with electronic elements, an indicator board are installed, pin contacts, characterized in that the protective shield mounted inside the housing is made in the form of flat jumpers between two parallel rings, one of which is flush with an external chamfer for interfacing with the sides of the smoke sampling windows at the end surface, and another ring mating with the opposite sides of the smoke sampling windows is flat with slots corresponding to the width of the partitions, in which the jumpers with latches are not connected to the flat ring, and the flat ring is elastically connected with a lever plate for protruding above the housing from the outside through one of the openings for the pusher control elements, which is in reverse contact with the counter contact plate, electrically with knitted on a circuit board with electronic elements and pin contacts, fixing the circuit board with electronic elements to the base inside the case and protruding on the other side of the base for connecting a mating outlet.