RU218529U1 - Suspended gas extinguishing device - Google Patents

Abstract

The utility model relates to automatic devices for volumetric extinguishing of fires of class A and B and electrical equipment by means of a gaseous fire extinguishing agent located in a pressure vessel of a propellant gas. Suspended gas fire extinguishing device contains a cylindrical vessel made of stainless steel from a thin-walled metal shell, equipped with two thin-walled metal bottoms. The shell with the bottoms can be made of stainless steel or aluminum and are interconnected, for example, by welding. The vessel is equipped with an outer load-bearing shell made of carbon fiber (see Fig. 1, 2). The carbon fiber power shell is made by winding it on the shell and bottom, followed by heat treatment. Carbon fiber threads are used as the reinforcing material of the load-bearing shell. The winding of the power shell is formed by successive laying of spiral and annular layers of impregnated reinforcing material according to a given program. Spiral and annular fiberglass layers can additionally be stacked sequentially on the carbon fiber load-bearing shell (see Fig. 4). The technical result of using the claimed utility model is to reduce the weight and metal consumption of the device. At the same time, it is possible to protect a large room from fires with one device.

Description

The utility model relates to automatic devices for volumetric extinguishing of fires of class A and B and electrical equipment by means of a gaseous fire extinguishing agent located in a pressure vessel of a propellant gas.

Known outdoor cylinders up to 100 l, made of steel with a thickness of at least 6 mm and weighing more than 100 kg (100 l - 104 kg, 60 l - 70 kg) without filling with a gas extinguishing agent. To protect the premises, these cylinders are equipped with a mounting rack and an exhaust system consisting of a pipeline and nozzles, which adds at least 20 kg (see https://afes.pro/mpa-60-75-32, https://firepro. ru/products/gazovoe-pozharotushenie/gazovoe-pozharotushenie.-xladonyi-125-i-227e/).

The disadvantage of these fire extinguishing systems is their heavy weight and complexity of maintenance.

A dual-direction gas fire extinguishing module is known, which contains a container, hinged brackets, two locking and distributing devices with pressure gauges, actuators, struts with shutoff valves, which are held in the closed position with the help of a heat-sensitive shell. The latter are destroyed when a signal is applied to the electric drives or when the temperature exceeds the set value. As a result, the shut-off valves open. The utility model is characterized by a short response time and high fire extinguishing capacity (see patent UA 35270, IPC A62C 99/00, A62C 17/00, A62C 37/00, 2008.09.10).

The disadvantage of the module is its heavy weight and the need to mount several modules with a significant volume of the protected room.

Known module gas fire extinguishing, including a housing filled with a fire extinguishing agent, a shut-off device and a housing mount. The module is equipped with a safety valve with a rupture disc and a case pressure sensor. The housing fastening unit consists of a cylindrical rod for interaction with a mounting bracket with a latch, which is mounted on the housing with one end opposite the locking and starting device. From the side of the opposite end on the cylindrical surface of the rod, an annular groove and two flats parallel to each other are made. A bypass channel is made in the safety valve to communicate the body cavity with the atmosphere, while the bursting disc is installed with the possibility of closing the bypass channel and is made in the form of a part of a sphere with its convex part facing the atmospheric outlet (RF patent No. 166375, IPC A62S 35/02 (2015.01) , .2016).

The disadvantage of the module is its heavy weight and the need to mount several modules with a significant volume of the protected room.

From the Internet, the Zarya gas fire extinguishing module is known, consisting of a gas cylinder, a shut-off and starting device, a boss and a mount. In the neck of the cylinder there is a LSD with a starting device (an electromechanical stimulator or a solenoid valve). The balloon is mounted on the ceiling or wall. (https://zarya.one/catalog/).

The disadvantage of the module is its heavy weight, since the cylinder is made with a large wall thickness due to the high internal overpressure, and the need, with a significant volume of the protected room, to mount several modules.

A fire extinguishing module is known, including a housing filled with a pressurized fire extinguishing agent with a mount in the upper part, located in the lower part of the housing, a shut-off and starting device made in the form of a vertically oriented fitting with outlets for a safety valve and a pressure sensor in the housing. The housing has a spherical shape, the fire extinguishing agent is in the liquid state in the housing with the formation of a gas zone above it. Each outlet is made in the form of a channel in the wall of the fitting, the inlet section of which is located on the side of the upper end of the fitting (see RF patent No. 2739388, IPC A62C 35/02 (2006.01), 2020).

The disadvantage of the module is its large weight, since the cylinder is made with a large wall thickness due to the high internal overpressure and the need, with a significant volume of the protected room, to mount several modules.

Hanging modules up to 25 liters are known (see publications https://bontel.ru/files/upload/production/5/letters-1_podves_2020_s.pdf, https://woolkan.ru/amodul-gazovogo-pozharotusheniya-mgp-vu /, https://woolkan.ru/file/Binder1.pdf).

The disadvantage of these modules is their large weight and small volume, therefore, if it is necessary to protect large premises, it is necessary to install several modules, which complicates the maintenance and control system.

Known module gas fire extinguishing (MGP) "Uranus". The design of the MGP provides for its installation both on the wall in a horizontal or vertical position, and on the ceiling. MGP consists of a sealed cylindrical steel body (1) filled with a gas fire extinguishing agent (GOTV). On the side of the housing there is a bracket (2) for mounting the module on the mounting surface using the mounting bracket (8). A shut-off and starting device (LPU) with a temperature-sensitive bulb (3) and an electromechanical activator (4) is screwed onto the lower fitting of the module, providing automatic and remote start-up of the MGP. The LPU is equipped with a pressure gauge (5) to control the pressure inside the tank and a fitting for pumping GOTV (6). A safety valve (7) is located on the side of the housing. A mounting box (9) is fixed on the bracket (2), which includes a terminal block for connecting the MGP to the cable line of the fire extinguishing system and protective earth (see the Product Data Sheet and publication on the website https://npksp.ru/directions/gas /suspended-type/). This decision was taken as a prototype.

The disadvantage of the module is its heavy weight (see the product data sheet - 12 kg without fire extinguishing agent with a filling volume of 20 l) and the need to mount several modules with a significant volume of the protected room, which leads to more complicated maintenance.

The technical problem is to reduce the weight of the device with the possibility of increasing the volume of the protected object and at the same time ensuring the operability of the device, reducing the complexity of the installation and operation of the device.

The technical result of using the claimed utility model is to reduce the weight and metal consumption of the device. At the same time, it is possible to protect a large room from fires with one device.

The technical result is achieved due to the fact that in a suspended gas fire extinguishing device containing a mount with a cylindrical vessel installed in it, equipped with a shut-off and starting device with a spray, according to the utility model, the vessel is made of stainless steel from a thin-walled metal shell equipped with two thin-walled metal bottoms and outer power shell made of carbon fiber.

The shell with bottoms can be made of stainless steel.

The shell with bottoms can be made of aluminium.

The power shell may include an outer fiberglass layer.

The device contains from one to three sprayers.

The execution of the vessel of the device is stainless from a thin-walled metal shell, equipped with two thin-walled metal bottoms and an outer power shell made of carbon fiber, which makes it possible to significantly reduce the weight of the device without a fire extinguishing agent and the metal consumption of the device with a filling volume of GFEA equal to 60 liters (up to 25 kg, which is about two times lighter conventional steel case according to the prototype). This is achieved due to the fact that the vessel of the device, made of stainless steel from a thin-walled metal shell, equipped with two thin-walled metal bottoms and an outer load-bearing shell made of carbon fiber, makes up the bulk of the weight of the device. At the same time, the low weight of the vessel makes it possible to reduce the size and weight of the mount, which also affects the reduction in weight and metal consumption of the device as a whole.

To ensure the operability of the device, it is necessary that the vessel, which is light in weight and made of stainless steel from a thin-walled metal shell, equipped with two thin-walled metal bottoms and an outer power shell made of carbon fiber, has the required strength under pressure of the GFEA located in the vessel under the pressure of the propellant gas. This condition is met due to the fact that the vessel is equipped with a power shell made of carbon fiber. The specified shell has a low weight, which reduces the weight of the device and at the same time increases the strength of the vessel when exposed to internal pressure created by the gas pumped into it. The most important characteristic of carbon fiber is its exceptional thermal stability. Even if the substance is heated to 1600-2000 degrees, then in the absence of oxygen in the environment, its parameters will not change. The density of this material, along with the usual one, can also be linear (measured in so-called texes). With a linear density of 600 tex, the mass of 1 km of the fabric will be 600 g. Thus, the presence of a carbon fiber load-bearing shell on a vessel made of stainless steel from a thin-walled metal shell equipped with two thin-walled metal bottoms can significantly reduce the weight of the vessel without a fire extinguishing agent (up to 25 kg). ) and reduce the metal consumption of the device with a filling volume of 60 liters and at the same time ensure the required strength of the pressure vessel.

In addition, reducing the weight of the vessel can significantly reduce the weight of the mount, which also entails a reduction in the weight and metal consumption of the device as a whole. This also facilitates the installation and relocation processes, and the placement of several sprayers on it with a large volume of the vessel makes it possible to reduce the number of gas fire extinguishing modules at the protected object, making it possible to protect a larger volume of the room with one device, which also reduces the complexity of the installation and operation of the device.

The device is shown in the diagrams:

Fig.1 - General view of the device;

fig. 2 - cross section of the device;

fig. 3 – longitudinal section of the shell;

fig. 4 - view A of Fig. 3.

Suspended gas extinguishing device contains a cylindrical vessel 1, made of stainless steel from a thin-walled metal shell 2, equipped with two thin-walled metal bottoms 3, 4. The shell 2 with the bottoms 3, 4 can be made of stainless steel or aluminum and are interconnected, for example, by welding .

Vessel 1 is equipped with an outer load-bearing shell 5 made of carbon fiber (see Fig. 1, 2). The power shell 5 of carbon fiber is made by winding it on the shell 2 and the bottom 3, 4, followed by heat treatment. Carbon fiber threads are used as the reinforcing material of the load-bearing shell. The winding of the power shell is formed by successive laying of spiral and annular layers of impregnated reinforcing material according to a given program. Spiral and annular layers 6 of fiberglass can additionally be stacked sequentially on the power shell 5 of carbon fiber (see Fig. 4).

The wall thickness of the thin-walled metal shell 2 and thin-walled metal bottoms 3, 4 made of stainless steel, from which the vessel of the device can be made, is 1 mm, the wall thickness of the carbon fiber power shell 5 is about 2 mm. When manufacturing a thin-walled metal shell 2, with two thin-walled metal bottoms 3, 4 made of aluminum, the wall thickness can be the same. The vessel 1 is equipped with a shut-off and starting device 7 with an electromagnetic valve (EMC). To install the shut-off and starting device 7, a fitting 8 is welded to the thin-walled metal shell 2. The connection of the shut-off and starting device 7 with the fitting 8 is carried out by means of a threaded connection (see Fig. 3).

When a signal is received at the EMC, the shut-off and starting device opens and the gas fire extinguishing agent (GOTV) enters through the pipeline 9, made of refractory plastic pipes, and sprayers 10, installed at the ends of the pipes, into the protected volume. Mounting sprayers 10, installed at the ends of the pipeline 9, is carried out by means of a threaded connection.

The diagram shows three nozzles 10, however, the shut-off device can be made with either one nozzle 10 or two nozzles 10. and attached to the ceiling. Vessel 1 is removably mounted in attachment point 11. The weight of the vessel without fire extinguishing agent is approximately 25 kg with its filling volume equal to 60 liters.

The device is equipped with a membrane safety device 12 (MPU). The current visual control of the pressure in the vessel of the device is carried out by the pressure indicator 13. In this case, the pressure drop in the vessel of the device is critical, which may indicate a depressurization of the vessel. Visual control, even periodic, is very laborious, therefore, the design provides for the use of a signaling pressure indicator 13, when the pressure in the vessel drops below the set value, a signal is generated that is sent to a remote control point. The communication means provides wireless transmission of the readings of the pressure indicator 13 in the form of CMC messages with the necessary comments.

The design scheme of the proposed suspended gas fire extinguishing device maximizes its reliability under conditions of long-term use. The device is recommended for use in any premises, its convenience and reliability are confirmed by tests.

The vessel of the device can withstand operating pressure up to 3 MPa and a test pressure of 4.5 MPa, which is confirmed by strength calculations that are performed during design, mandatory hydraulic tests and is confirmed before the start of production by the mandatory declaration of the vessel of the device for compliance with TR TS 032/2013.

The suspended gas fire extinguishing device functions as follows.

The device is permanently mounted in a known manner on the object to be protected, preferably on the ceiling or on the wall above the most probable fire location.

During the entire process of being at the object to be protected, the pressure indicator 13 measures the pressure level in the vessel 1. At the same time, the readings of the pressure indicator 13 in the form of an electrical signal are sent to the electronic wireless data transmission unit (not shown conventionally).

The vessel 1 of the device is under the pressure of saturated vapors of the gas extinguishing agent and the pressure of the propellant gas (nitrogen). The pressure value depends on the ambient temperature. The device is equipped with a membrane safety device 8 (MPU). In the event of an increase in pressure in vessel 1 above the response pressure, the propellant gas is released through the MPU 12, which prevents the vessel from bursting.

At the signal of a fire detector, in the event of signs of a fire, a gas fire extinguishing device is launched. Because vessel 1 of the device can be equipped with at least three nozzles 10, guaranteed coverage of the entire volume of the protected object is achieved. By making the vessel 1 stainless from a thin-walled metal shell 2, equipped with two thin-walled metal bottoms 3, 4 and a covered load-bearing shell 5 made of carbon fiber, the weight is reduced, so the length of the vessel 1 can be increased to provide the possibility of exposure to one device to protect the premises of a large volume . If necessary, the length of the vessel of the device can be from one to three meters or more, and an appropriate number of sprayers can be installed on it. That is, the proposed device can replace 5-6 known suspension modules.

The claimed device can be manufactured on modern equipment using known technologies and materials.

The claimed utility model can be used in any premises for volumetric extinguishing of class A and B fires and electrical equipment by means of a gaseous fire extinguishing agent located in a vessel under constant pressure.

Claims (4)

1. Suspended gas fire extinguishing device, containing a mount with a cylindrical vessel installed in it, equipped with a shut-off and starting device with a spray, characterized in that the vessel is made of stainless steel from a thin-walled metal shell, equipped with two thin-walled metal bottoms and an outer power shell made of carbon fiber. 2. The gas fire extinguishing device according to claim 1, characterized in that the shell with the bottoms is made of stainless steel. 3. The gas fire extinguishing device according to claim 1, characterized in that the shell with the bottoms is made of aluminum. 4. The gas fire extinguishing device according to claim 1, characterized in that the power shell additionally includes an outer fiberglass layer.

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