CN203507360U - Automatic superfine dry powder extinguishing device - Google Patents

Abstract

The utility model is an automatic superfine dry powder fire extinguishing device, the pressure tank is provided with an inverted conical bottom, the bottom of the pressure tank is provided with a supporting base, and the pressure tank is filled with superfine dry powder fire extinguishing agent and driving gas; the bottle head The valve is provided with a ball valve and a polymer hose filled with driving gas connected to the outlet of the ball valve. The tail end of the polymer hose is provided with an inflation check valve and an air pressure gauge connected to the outlet of the valve. The bottle head valve is provided with The air charging interface, the air gauge interface and its air gauge, the detection interface and its pressure sensor, the electrical signal output by the pressure sensor is connected to the alarm display. The device uses a polymer hose to directly transport and spray the superfine dry powder fire extinguishing agent to the place where the early fire occurs, which significantly enhances the detection and fire fighting effects of the fire, especially the early fire. The design of the pressure tank at the conical bottom and the siphon method solve the practical problem that the residual rate of the fire extinguishing agent is too large and affects the fire extinguishing effect.

Description

Ultrafine dry powder automatic fire extinguishing device

technical field

The utility model belongs to fire-fighting and fire-extinguishing equipment, in particular to an ultra-fine dry powder automatic fire-extinguishing device for extinguishing early fires.

Background technique

Ultrafine dry powder fire extinguishing agent has small particle size, large specific surface area per unit mass, high activity, and has the characteristics of fast fire extinguishing speed and high efficiency. After the ultrafine dry powder fire extinguishing agent is released, most of its fine particles can be quickly dispersed and suspended in the air. A relatively stable fire extinguishing aerosol is formed in the air, so the ultra-fine dry powder fire extinguishing agent can be used not only for full flood fire protection for confined spaces, but also for local fire protection for specific protected objects, and has broad application prospects.

The existing superfine dry powder fire extinguishing equipment mainly includes: pipe network fire extinguishing system, cabinet fire extinguishing device, temperature-sensitive self-starting dry powder fire extinguishing device, portable and cart-type fire extinguishers, etc. Among them, the pipe network dry powder fire extinguishing system includes fire source detectors installed in each partition of the protected area, temperature detectors and controllers in the protected area, air supply devices, mist mixing tanks, and nozzles controlled by electric valves in each partition. The pipe network dry powder fire extinguishing system and the cabinet ultrafine dry powder fire extinguishing system are designed to detect and extinguish fires in the entire protected area or room. There are large and complex systems, a large amount of fire extinguishing agent design, and point-to-point fire protection against major hazards. question.

Temperature-sensitive self-starting dry powder fire extinguishing devices usually use temperature-sensing elements such as glass bubbles and fusible alloys as fire detection elements. Since the fire detection range of temperature-sensing elements such as glass bubbles and fusible alloys is limited, it is often used when the fire is relatively large. Start the fire extinguishing device, thereby missing the best fire extinguishing period. Compared with implementing fire extinguishing in the initial stage of the fire, it is much more difficult to implement fire extinguishing when the fire is large.

Portable and cart-type dry powder fire extinguishers are not automatic fire extinguishing devices and must be used in places where people are on duty, but they cannot function in places where no one is on duty or people are not often present.

At present, the direct fire detection tube type automatic fire extinguishing device in the field of gas fire extinguishing technology uses a polymer hose with a diameter of 6mm as the fire detection element. When a fire or abnormally high temperature occurs and the hose rupture temperature is reached, the device will start, and the gas fire extinguishing agent will spray out from the hose rupture and directly act on the fire source or heat source to extinguish the fire in the bud stage, which can realize real The purpose of fighting early fires.

However, due to the elimination of Halon1301 and Halon1211 gas fire extinguishing agents, the gas fire extinguishing agents currently used for direct fire detection tube type automatic fire extinguishing devices are mainly heptafluoropropane and carbon dioxide. Among them, the fire extinguishing efficiency of heptafluoropropane is low, so the fire extinguishing design concentration requirement is 0.7kg/m ³ in the case of total flooding, while the ultrafine dry powder fire extinguishing agent only needs to be within 0.15kg/m ³ , and some ultrafine dry powder fire extinguishing agents can reach 0.06 kg/m ³ . Heptafluoropropane itself is a powerful greenhouse gas (GWP is 2900), and a large amount of toxic hydrogen fluoride gas will be produced during the fire extinguishing process, and the price of heptafluoropropane is relatively high. In addition, heptafluoropropane fire extinguishing agent is rarely used for local fire extinguishing. Carbon dioxide only has the effect of physical fire extinguishing, and its fire extinguishing efficiency is lower. The fire extinguishing design concentration needs to be 1.5kg/m ³ in total flooding fire extinguishing, and the system pressure in actual application is relatively high.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art, and disclose a superfine dry powder automatic fire extinguishing device for quickly and efficiently extinguishing early fires.

The utility model adopts the following technical schemes to achieve the above object: an ultrafine dry powder automatic fire extinguishing device, including a pressure tank, a bottle head valve and a siphon pipe connected to the bottle head valve, characterized in that the pressure tank is provided with an inverted cone At the bottom, the inverted conical bottom of the pressure tank is provided with a supporting base, and the pressure tank is filled with ultra-fine dry powder fire extinguishing agent and driving gas; the bottle head valve is provided with a ball valve and a polymer hose filled with driving gas connected to the outlet of the ball valve , the tail end of the polymer hose is provided with an inflation check valve and an air pressure gauge connected to the outlet of the valve, and the bottle head valve is provided with an inflation interface, an air gauge interface, an air pressure gauge, a detection interface, and a pressure sensor thereof. The electrical signal output by the pressure sensor is connected to the alarm display.

The utility model can also take the following technical measures:

The bottle head valve is provided with a safety relief valve.

The top and side of the bottle head valve are respectively provided with ball valves, the outlets of each ball valve are respectively provided with polymer hoses filled with driving gas, and the tail ends of each polymer hose are respectively provided with inflatable one-way valves and connected to the valves. Exit barometer.

The distance from the bottom end of the siphon tube to the inverted cone-shaped bottom of the pressure tank is 1-10 mm, the bottom port of the siphon tube has a bevel angle of 30°, and the upper part of the siphon tube corresponds to the position of the driving gas in the pressure tank at least with a diameter of 0.05 mm-1 mm. air intake micropores.

The driving gas pressure range of the pressure tank and the polymer hose is 0.8-2.5Mpa.

The polymer hose is a temperature-sensitive fire extinguishing pipe or a fire detection pipe for a fire extinguishing system.

The ultrafine dry powder fire extinguishing agent is BC type, ABC type or D type ultrafine dry powder powder fire extinguishing agent, with an average particle size of 3 microns to 75 microns.

Beneficial effect and advantage of the utility model are:

(1) The device uses a polymer hose that can detect early fires in time and can directly spray ultra-fine dry powder fire extinguishing agent, which has significantly enhanced the detection and extinguishing effect of fires, especially early fires. This device can realize all-round and all-weather fire detection and fire extinguishing protection for key hazard sources or dangerous areas in enclosed and semi-enclosed spaces; (2) The device has a simple structure, is safe and reliable, and is easy to install, use and maintain without requiring a huge pipe network System and complex electrical control system; (3) The device adopts a conical bottom pressure tank design and siphon method, which can spray ultra-fine dry powder fire extinguishing agent through the polymer hose, which solves the problem of excessive fire extinguishing agent injection remaining rate The practical problem of fire extinguishing effect; (4) The device can detect the internal pressure by itself, and give an alarm when the pressure drops to a certain value, which completely solves the problem that the existing pressure storage type dry powder fire extinguishing device delays the fire extinguishing time due to the pressure drop.

The remaining amount of fire extinguishing agent injection and the remaining rate of fire extinguishing agent injection of the device will be described below through comparative experiments.

Table I

Table of experimental results using ordinary portable fire extinguishers (spraying from a 10m long fire probe)

Table II

Table of experimental results using the device of the present invention (spraying from a 10m long fire probe)

As can be seen from the above comparative experiments, the remaining amount of fire extinguishing agent injection and the remaining rate of fire extinguishing agent injection of the ultrafine dry powder automatic fire extinguishing device are significantly better than ordinary dry powder fire extinguishing tanks.

Description of drawings

Accompanying drawing 1 is the partial sectional schematic diagram of embodiment 1 structure.

Accompanying drawing 2 is another structural representation of bottle head valve.

Accompanying drawing 3 is the structural representation of embodiment 2.

Accompanying drawing 4 is the structural representation of embodiment 3.

Marks in the picture: 1 pressure tank, 2 bottle head valve, 3 inflation port, 4 ball valve, 5 polymer hose, 6 air pressure gauge, 7 inflation check valve, 8 tank body air pressure gauge, 9 pressure sensor, 10 safety pressure relief Valve, 11 siphon pipes, 11-1 air intake microhole, 11-2 bottom port, 12 fire extinguishing agent, 13 base, 14 protected objects, 15 alarm display.

Detailed ways

Below in conjunction with embodiment and accompanying drawing thereof further illustrate the utility model.

As shown in Fig. 1, the ultra-fine dry powder automatic fire extinguishing device is shown in Example 1 of the automatic fire extinguishing device, the barrel of the pressure tank 1 is provided with an inverted conical bottom, and the inverted conical bottom of the pressure tank is provided with a support base 13 . A ball valve 4 and a polymer hose 5 filled with driving gas connected to the outlet of the ball valve are provided on the top of the bottle head valve 2 connected to the mouth of the pressure tank. The tail end of the polymer hose is provided with an inflation check valve 7 And the air pressure gauge 6 connected to the outlet of the valve. The polymer hose 5 is arranged within the area of the protected object 14 . The pressure tank is filled with superfine dry powder fire extinguishing agent and driving gas. The superfine dry powder fire extinguishing agent is BC or ABC or D superfine dry powder powder fire extinguishing agent, with an average particle size of 3 microns to 75 microns. The driving gas is nitrogen or carbon dioxide or other inert gases.

The bottle head valve 2 shown in Figure 1 is provided with an inflation interface 3, an air pressure gauge interface and its tank body air pressure gauge 8, a detection interface and its pressure sensor 9, and a safety pressure relief valve 10. The pressure range of the pressure sensor is 0 to 2.5 The electrical signal output by the MPa pressure sensor is connected to the alarm display 15, and each interface provided by the bottle head valve 2 communicates with the spool channel of the bottle head valve 2.

The bottom port of the bottle head valve 2 spool channel shown in Fig. 1 is connected to the siphon tube 11, the distance from the bottom port 11-2 of the siphon tube to the inverted conical bottom of the pressure tank is 1-10 mm, and the bottom port of the siphon tube has a 30° oblique angle, On the upper part of the siphon tube 11 corresponding to the position of the driving gas in the pressure tank, there is an air inlet microhole 11-1 with a diameter of 0.05 mm to 1 mm. , to ensure the continuity of the delivery of the fire extinguishing agent 12 in the tank. The number and diameter of the air intake microholes can be adjusted according to the fire extinguishing agent delivery concentration, delivery rate and continuous injection time required by the protected object.

The driving gas pressure range of the pressure tank 1 and the polymer hose 5 in Example 1 shown in Figure 1 can be 0.8-2.5Mpa, and the polymer hose 5 is a temperature-sensitive fire extinguishing tube or a fire detection tube for a fire extinguishing system.

The pressure sensor 9 and alarm display 15 shown in FIG. 1 can detect the internal pressure of the pressure tank in real time when used in actual application sites, and give an alarm prompt when the pressure drops to a certain value due to long-term chronic leakage. When the device encounters a fire and starts normally and sprays out the fire extinguishing agent, if the pressure inside the pressure tank is lower than the set pressure value, it will also give an alarm in time to remind relevant personnel to inflate and pressurize and fill the ultrafine dry powder fire extinguishing agent.

The bottle head valve 2 shown in Figure 2 is another structural form of the bottle head valve of the ultrafine dry powder automatic fire extinguishing device of the device, and the difference from the bottle head valve shown in Figure 1 is that the valve body is provided with a plurality of ball valves 4 , Others such as the inflation interface 3, the air gauge interface and its tank body pressure gauge 8 and the detection interface and its pressure sensor 9, safety relief valve 10 are the same as the bottle head valve shown in Figure 1.

The bottle head valve 2 shown in Figure 2 is suitable for occasions where there are many protected objects or a large range. It not only expands the fire extinguishing protection range of the device, but also ensures the fire extinguishing effect, avoiding the need to extend the length of the polymer hose to increase the Unreliable use of guard ranges.

The bottle head valve of the device can also adopt a similar existing container valve, as long as the surface interface of the container valve or the composite valve can be used to meet the needs of the device.

Example 2 as shown in Figure 3, the polymer hose 5 connected to the ball valve at the top of the bottle head valve 2 of the pressure tank 1 with a base 13 is arranged in a top-to-bottom rotation within the scope of the protected object 14, and it can also be arranged Arranged in the same manner around the main hazard, the end of the polymer hose is provided with an inflation check valve 7 and an air pressure gauge 6 connected to the valve outlet.

The electrical signal output by the pressure sensor provided on the bottle head valve 2 shown in FIG. 3 is connected to the alarm display 15 . The specific structures of the pressure tank 1 and the bottle head valve 2 of embodiment 2, such as the tank body pressure gauge 8, etc., are the same as those of the embodiment 1 in Fig. 1, and the bottle head valve 2 can also adopt a similar container valve.

The driving gas pressure range of the pressure tank 1 and the polymer hose 5 in Example 2 shown in Fig. 3 can be 0.8-2.5Mpa, and the polymer hose 5 is a temperature-sensitive fire extinguishing tube or a fire detection tube for a fire extinguishing system.

Example 3 as shown in Figure 4, the polymer hoses 5 connected to the three ball valves on the top of the bottle head valve 2 of the pressure tank 1 with the base 13 are rotated from top to bottom within the scope of the respective protected objects 14. It can also be arranged in the same way around the main danger sources in the respective protected objects 14. The tail end of the polymer hose is provided with an inflatable check valve and an air pressure gauge connected to the outlet of the valve. The bottle head valve 2 is provided The electrical signal output by the pressure sensor is connected to the alarm display 15 . The specific structures of the pressure tank 1 and the bottle head valve 2 in Embodiment 3 are the same as those of Embodiment 1 in FIG. 1 , and the bottle head valve 2 can also adopt a similar container valve.

The driving gas pressure range of the pressure tank 1 and the polymer hose 5 of the embodiment 3 shown in Fig. 4 can be 0.8～2.5Mpa, and the polymer hose 5 is a temperature-sensitive fire extinguishing tube or a fire detection tube for a fire extinguishing system, so The inner diameter of the hose is 3-8mm.

The canning method of this device: first fill a certain amount of fire extinguishing agent into the pressure tank, then seal and install the bottle head valve, etc., connect a certain length of polymer hose, and in the closed state of the ball valve, through the inflation valve on the bottle head valve The interface fills the pressure tank with the driving gas of the specified pressure value, and fills the tube with the driving gas of the specified pressure value through the inflation check valve at the end of the polymer hose, and the ball valve can also be opened to allow the driving gas of the pressure tank to enter the polymer. hose.

How to use this device: transport the device to the range of the protected object, fix the pressure tank vertically; arrange the polymer hose inside the protected object or around the main danger source, and fix the hose with clamps; connect the pressure sensor signal line Connect to the alarm display, set the alarm pressure value, and the unit is installed.

Claims (7)

1. super fine dry powder fire extinguisher, comprise pressurized tank, bottle valve and be connected in the siphon pipe of bottle valve, it is characterized in that: described pressurized tank is provided with the bottom of back taper, pressurized tank back taper bottom is provided with base for supporting, and pressurized tank is filled with ultra-fine dry powder extinguishing agent and driving gas; Described bottle valve is provided with ball valve and is connected in the polymer flexible pipe that is filled with driving gas of ball valve outlet, the tail end of polymer flexible pipe is provided with inflation check valve and is connected in the air gauge of this valve outlet port, described bottle valve is provided with inflatable interface, air gauge interface and air gauge thereof and detection interface and pressure sensor thereof, and the signal of telecommunication of described pressure sensor output is connected in attention display.

2. super fine dry powder fire extinguisher according to claim 1, is characterized in that: described bottle valve is provided with safety relief valve.

3. super fine dry powder fire extinguisher according to claim 1, it is characterized in that: top and the side of described bottle valve are respectively equipped with ball valve, each ball valve outlet is respectively equipped with the polymer flexible pipe that is filled with driving gas, and the tail end of each polymer flexible pipe is respectively equipped with inflation check valve and is connected in the air gauge of this valve outlet port.

4. super fine dry powder fire extinguisher according to claim 1, it is characterized in that: described siphon pipe bottom to the distance of pressurized tank cylindrical shell back taper bottom is 1～10mm, siphon pipe bottom nozzle has 30 ° of oblique angles, and in the corresponding pressure tank of siphon pipe top, the position of driving gas is at least provided with the air inlet micropore that a diameter is 0.05mm～1mm.

5. according to super fine dry powder fire extinguisher described in claim 1 or 3 or 4, it is characterized in that: the driving gas pressure limit of described pressurized tank and polymer flexible pipe is 0.8～2.5Mpa.

6. super fine dry powder fire extinguisher according to claim 1, is characterized in that: described polymer flexible pipe is that fire-fighting system is with warming fire extinguishing tube or visit fire tube.

7. super fine dry powder fire extinguisher according to claim 1, is characterized in that: described ultra-fine dry powder extinguishing agent is BC class or ABC class or D class ultra-fine dry powder powder extinguishing chemical, and particle mean size is 3 microns～75 microns.

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