RU16079U1 - START-UP DEVICE FOR AUTOMATIC FIRE-FIGHTING INSTALLATIONS - Google Patents

Description

Lock-starting device for automatic fire extinguishing installations

The utility model relates to fire fighting equipment, namely, locking and starting devices, and is designed to hold the extinguishing fluid in the pipeline under overpressure and quickly automatically start it in emergency situations to the spray guns. The utility model can be used in various industries, in particular, in the mining industry to extinguish fires in mining.

A device for remote selective inclusion of fire extinguishing means in mine workings, comprising a main pipeline, stationary fire extinguishing means, control valves, a control panel located in a mine with a fresh air stream, an overhead crane and a bypass pipe with a three-way valve (J. Mine construction, 1989, No. 12, p.21-23), The disadvantages of the known devices include the complexity of the design and control.

Known locking and starting device for fire extinguishing installations, containing inlet and outlet nozzles separated by a baffle and forming a seat, a membrane valve including upper and lower covers, a membrane with a locking element and a drive mechanism made in the form of a cylinder mounted on the cover with a spool, discharge and radial openings and channels for connecting the motive system. (USSR author's certificate No. 1708366, class A62C 37/08, 1990)

The principle of operation of the known device is. that when the drive mechanism is triggered, pressure is released from the induction cavity above the spool and the latter rises and opens radial openings to relieve fluid pressure from the valve cavity under the action of fluid pressure. In this case, the membrane with the locking element exits the saddle, blocks the inlet to the cylinder and the liquid through the space above the baffle comes under pressure from the inlet to the outlet pipe and then to the sprinklers.

The main disadvantages of the known device are:

the use of a spool for controlling the valve complicates the design of the device, since requires an additional fluid supply system to move the spool;

low reliability due to asymmetric loads on the membrane.

A locking and starting device for automatic fire extinguishing installations is proposed, comprising a diaphragm valve with a lower and upper cover and a membrane installed between them, an inlet and an outlet pipe separated by a partition and forming a valve seat with a lower cover, and a hydraulic induction line connected through a fitting in the upper cover with valve cavity.

The essence of the utility model is that the partition between the inlet and outlet nozzles is installed in the plane of their connection and separates the valve seat into two parts that are equal in area, and the membrane is spring-loaded relative to the valve top cover and is equipped with

Gm

; (

-2 a small diameter hole located above the inlet pipe.

Compared with the known devices, this device has a simple design and provides reliable automatic activation of fire extinguishing means when the temperature rises above the permissible level. Separation of the membrane area of the membrane valve seat into two equal parts reduces the negative impact on the membrane of the loads from the fluid flow when the valve is opened, which increases reliability and durability of the membrane.

The essence of the utility model is illustrated by drawings, where in Fig.1 shows a locking and starting device in section, in Fig.2 also, in the open position.

The locking and starting device for automatic fire extinguishing installations includes a membrane valve containing a bottom cover 1, a top cover 2, a membrane 3 with a support plate 4, installed with the indicated covers, and a spring 5 for pressing the membrane to the seat 6. The device also includes an input 7 and outlet 8 nozzles, interconnected by means of a partition 9 and forming a saddle 6 kpapan. The partition 9 is installed so that it divides the saddle into two parts equal in size to the area. The membrane is rigidly connected to the support plate and they are provided with a through hole 10 with a diameter of 3 mm located above the inlet pipe /. The inlet pipe is connected to the pressure line using the connecting link 11, and the output pipe using the connecting link 12 with an irrigation pipe, a water curtain or other

extinguishing media (not shown). A fitting 13 is integrated in the top cover of the diaphragm valve to connect the device to a hydraulic induction line or to a thermal lock (not shown).

The device operates as follows. In standby mode, the membrane J is pressed against the seat 6 kpapan. Liquid under pressure from the inlet pipe 7 through the hole of small diameter 10 fills the valve cavity and the hydraulic motive line, the membrane is pressed against the valve seat due to the spring 5 and the pressure difference acting on the membrane from both sides.

When a fire occurs in the mine, the induction line is depressurized or the thermal lock is destroyed, while the pressure in the cavity in the valve drops to atmospheric pressure. Due to the fact that the diameter of the hole 10 is very small, the liquid from the inlet pipe overcomes the resistance of the spring 5, raises the membrane 3 and rushes into the outlet pipe 8 and further to the nozzles. Due to the areas of the saddle 6 .., which are equally large in area, through which liquid enters and is discharged from the valve, the membrane has approximately the same loads over the entire area, which increases its service life and increases the reliability of the device as a whole.

After extinguishing the fire, replace the thermal lock or restore the tightness of the induction line. Due to the flow of fluid from the inlet pipe 7 through the hole 10 in the cavity of the membrane valve, the pressure is trapped and under the action of the spring 5, the membrane 3 enters the seat 6 and blocks the flow of fluid from the inlet pipe 7 to the outlet pipe 8

those. the device goes into standby mode.

Compared with the prototype, the proposed locking and starting device provides reliable operation of automatic fire extinguishing systems and has a simple design

Deputy Director of KEZSB f СО / Smirnov A.F. /

Claims (1)

A locking and starting device for automatic fire extinguishing installations, comprising a diaphragm valve with a lower and upper cover and a membrane installed between them, an inlet and an outlet pipe separated by a partition and forming a valve seat with a lower cover, and a hydraulic induction line connected through a fitting in the upper cover to the cavity of the valve, characterized in that the partition between the inlet and outlet nozzles is installed in the plane of their connection and divides the valve seat into two parts equal in area, p By the way, the membrane is spring-loaded relative to the upper valve cover and is provided with a small diameter hole located above the inlet pipe.