RU16077U1 - INSTALLING AUTOMATIC FIRE EXTINGUISHING - Google Patents

Description

automatic fire fighting

The utility model relates to fire fighting equipment, namely, automatic installations for extinguishing a fire with liquid, and can be used in the coal industry, as well as in other sectors of the national economy.

A known installation of water fire extinguishing UVK, containing a pressure cavity connected to a pressure pipe, deluge cavity connected by a pipeline to sprinklers, and a membrane valve with a starting device (J.-Coal of Ukraine, 1992, No. 11, p. 38-40).

The main disadvantages of the known installation are:

low reliability of the starting device based on a fire detector and an electric circuit;

frequent failure of the membrane valve due to destruction of the membrane;

the complexity of the design and the high complexity of manufacturing.

An automatic fire extinguishing installation is also known, comprising a locking and starting device, a supply pipe, a starting unit connected to the induction line, and a distribution pipe with irrigators (USSR patent No. 1831346, KL.A62C 35/00, 1991).

The locking-starting device contains a valve, in the cavity of which a locking membrane with a central and additional holes is located, dividing the device into a pressure, stimulating and deluge chamber.

a -a about about i. g, dd2s 35/00

INSTALLATION

membrane, liquid is drained from the induction cavity into the deluge, under pressure of the liquid, the membrane moves away from the valve seat and the liquid from the pressure cavity enters the deluge and then through the distribution pipe to the sprinklers.

The main disadvantage of the known device is the low reliability of the membrane valve due to the presence in the membrane in addition to the central row of additional holes, which reduces its strength, and the constant impact on the flexible part of the membrane fluid under pressure.

An automatic fire extinguishing installation comprising a pressure line, a distribution pipe with sprinklers, an induction hydraulic line and a shut-off device including a pressure and deluge chamber and a membrane valve mounted on these chambers, the membrane of which is provided with a central hole of small diameter, is proposed.

The difference between the utility model and the prototype is that the pressure chamber is made in communication with the motive cavity of the valve through the central hole in the membrane, and the bottom cover of the valve is provided with through channels extending under the membrane and into the deluge chamber.

This embodiment of the locking and starting device of the automatic fire extinguishing installation increases its reliability and its service life by increasing the service life of the valve membrane, reducing loads on it during operation of the installation in standby mode, and increasing speed in case of fire.

figure 2 - locking-starting device, in fig.Z - section 1-1 of figure 2.

The automatic fire extinguishing installation includes a shut-off device 1 connected to the pressure line 2, a distribution pipe 3 with sprinklers 4 and a hydraulic induction line 5 with sprinklers 6.

The locking-starting device includes a pressure chamber 7 and a deluge chamber 8, arranged coaxially, and a membrane valve mounted on them, comprising a top cover 9, a bottom cover 10, a membrane 11 with a support plate 12, fixed between the covers and a spring 13, by which the membrane spring loaded relative to the top cover. The membrane is equipped with a central hole 14 of small diameter, through which the motive cavity 15 kpapan communicates with the pressure chamber. The bottom cap 10 of the valve covers the deluge chamber 8 and through channels 16 are made in it, extending from one side under the membrane 11, and on the other hand into the deluge chamber. The pressure chamber 7 is connected to the pressure line 2, the deluge chamber 8 - through a distribution pipe 3 with sprinklers 4, the stimulation cavity 16 of the valve - with a hydraulic stimulation line 5.

The installation is as follows. In standby mode, the hydraulic induction line 5 is sealed, through a hole 14 in the membrane, liquid under pressure from the pressure chamber 7 fills the induction cavity 15 of the valve and under the action of the difference of forces and the spring 13, the membrane 11 is located in the valve seat and the through channels 16 in the lower canopy 10 are closed.

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When a fire occurs, any of the sprinklers 6 is destroyed and the hydraulic motive line 5 is depressurized, which leads to the discharge of fluid from the motive cavity 15 of the valve. Due to the force acting on the membrane 11 from the pressure chamber 7, the membrane exits the seat and opens the outlet from the pressure chamber and through channels 16 in the bottom cover 10. Liquid under pressure passes under the membrane, through channels 16 it enters the deluge chamber and then through the distribution chamber pipeline 3 to irrigators 4 for extinguishing a fire and creating water curtains. After the fire is extinguished, the hydraulic induction line is restored to airtightness, after which, due to the flow of liquid under pressure through the hole 14 in the membrane, the pressure in the valve stimulus is restored and under the action of the spring 13, the membrane blocks the outlet from the pressure chamber.

Due to the entry into the deuterium cavity in the form of symmetrically located through channels, the valve membrane is unloaded in standby mode, because the pressure on it from the induction cavity is perceived by the lower cover, which increases the life of the membrane by 3-4 times. In known installations, through the central hole in the membrane, liquid is discharged from the stimulating cavity of the valve, and liquid is supplied under pressure through peripheral holes, which reduces the strength of the membrane and leads to a quick failure of the valve. In the proposed installation, the hole is located in the center of the membrane and through it the liquid enters the valve under pressure, which ensures uniform distribution of loads.

Thus, the advantage of the proposed fire extinguishing installation is to increase the reliability of its operation and reduce the likelihood of false positives.

Deputy Director of KEZSB х1 - / / Smirnov A.F. / V / $, (1.

Claims (1)

An automatic fire extinguishing installation comprising a pressure line, a distribution pipe with sprinklers, a hydraulic induction line and a locking and starting device including a pressure and deluge chamber and a membrane valve mounted on these chambers, the membrane of which is provided with a central hole of small diameter, characterized in that the pressure chamber made communicating with the motive cavity of the valve through a Central hole of small diameter in the membrane, and the bottom cover of the valve is provided with SLE ozny channels that go under the membrane and into the deluge chamber.