CN1810326B - Pulse dual fluid water mist fire extinguisher - Google Patents

Abstract

The pulse dual-fluid water mist fire extinguishing gun is a fast and efficient fire extinguishing equipment, belonging to the technical field of public safety emergency rescue equipment. Including nozzle casing 1, nozzle 2, nozzle pipe 3, inner core 4, gun body 5, central shaft 6, sealing ring 7, bearing 8, air intake pipe 9, airflow switch 10, rotary valve 11, stop block 12, water inlet pipe 13. Water flow switch 14, rear seat 15, connection block 16, fixed nut 17, spring 18, button switch 19, retaining ring 20, air inlet 21, water inlet 22 and groove 23; retaining ring 20 will be equipped with a rotary valve The bearing 8 of 11 is fixed on the central shaft 6 and connected with the back seat 15 and fixed on the gun body 5; the present invention has strong fire extinguishing impact force, good pulse effect, small water mist particle size, small water flow loss, strong fire control ability, and fire extinguishing The effect is good, it is a new type of efficient and clean fire extinguishing equipment, suitable for rapid extinguishing of solid fires, oil fires and their composite fires, and electrical fires in civil buildings and industrial and mining enterprises.

Description

Pulse dual fluid water mist fire extinguisher

technical field

The invention relates to a pulse dual-fluid water mist fire extinguishing gun, which belongs to a kind of fast and efficient fire extinguishing equipment and belongs to the technical field of public safety emergency rescue equipment.

Background technique

Water is a clean and efficient fire extinguishing agent with convenient sources and no pollution. However, in common water sprinkler systems, the water particles are large in size, small in surface area, and slow in vaporization speed. They can easily fall to the ground under the action of gravity and become ineffective. The running water has a low water utilization rate, and a large amount of water loss may also cause secondary water pollution. According to statistics, about 90% of the direct current water used for fire extinguishing flows during fire extinguishing, and only a small part of it really works on fire extinguishing; Difficulty; in addition, DC water is not suitable for extinguishing electrical fires. Therefore, the fire extinguishing efficiency of the common water sprinkler system is low, and the loss of water flow is serious. The water mist obtained by the water atomization technology has a small particle size and a fast heat absorption speed. After vaporization in the flame area, a large amount of water vapor will be generated, reducing the oxygen concentration around the flame, thus greatly improving the fire extinguishing efficiency.

However, common water mist fire extinguishing equipment usually adopts the method of increasing water pressure to break water particles. Although the particle size of water particles can be reduced within a certain range, the system often requires high water supply pressure, and the water pressure is lost during the nozzle atomization process. Large, so the impact force is not strong when extinguishing fire, the spray distance is short, the protection range is small, and the fire extinguishing effect is not ideal. However, the pulse dual-fluid water mist fire extinguishing gun of the present invention uses compressed air to directly atomize direct-flow water, which not only greatly reduces the particle size of water particles , and form a two-fluid fire extinguishing medium with a large impact force mixed with water and air, especially the inner and outer water flow structure to further improve the fire extinguishing efficiency. The vaporization speed is fast, which can quickly reduce the temperature of the flame area. At the same time, a large amount of water vapor is generated after the vaporization of the water mist, which quickly reduces the oxygen content around the flame and improves the fire extinguishing efficiency; because the compressed air in the outer ring has a large impact force, it can directly cut off the root of the flame. At the same time, the compressed air of the outer ring can protect the water mist of the inner ring, which can reduce the friction loss of the fine water mist particles in the inner ring in the air, transport them to the combustion area over a long distance, reduce the temperature of the flame area, and greatly improve the fire extinguishing effect. efficiency.

Although continuous water mist has a good fire extinguishing effect on high-power fire sources, it is often not effective in extinguishing "little sparks" that are covered, and often takes longer, and these "little sparks" can easily cause "resurrection". Phenomena, and the pulse fire extinguishing method can produce greater air disturbance to the combustion airflow, and has a better extinguishing effect on "little sparks".

Therefore, the present invention proceeds from the fire extinguishing mechanism, adopts a two-fluid fire extinguishing medium mixed with water and gas, designs an internal and external two-circle water flow structure, and adopts a mechanical pulse mode, which has better effects on solid fires, oil fires, composite fires, and electrical fires. The fire extinguishing efficiency of the present invention can be widely used in civil buildings or industrial places because of its simple structure and convenient use.

Contents of the invention

The pulse dual-fluid water mist fire extinguishing gun of the present invention can quickly cut off the fire source at a certain distance, and quickly extinguish the sheltered "small sparks" through the pulse action. It has a simple structure and is easy to use. It has strong fire extinguishing ability, and is also suitable for rapid extinguishing of electrical fires;

A pulse two-fluid water mist fire extinguishing gun, comprising a nozzle sleeve 1, a nozzle 2, a nozzle 3, an inner core 4, a gun body 5, a central axis 6, a sealing ring 7, a bearing 8, an air intake pipe 9, an air flow switch 10, Rotary valve 11, stop block 12, water inlet pipe 13, water flow switch 14, rear seat 15, connection block 16, fixed nut 17, spring 18, button switch 19, retaining ring 20, air inlet 21, water inlet 22 and concave slot 23;

The nozzle sleeve 1 refers to a cylindrical sleeve, which is installed at the front end of the gun body 5; Connected with the inner core 4; the nozzle 3 refers to a cylindrical casing, which is installed at the front end of the inner core 4 and fixed on the nozzle 2; the inner core 4 refers to a cylinder with four holes body, which is installed on the shower head 2; the gun body 5 is a shell part of the present invention, and it is connected with a plurality of parts such as the sleeve pipe 1, the shower head 2, the air intake pipe 9, the rotary valve 11, the back seat 15, the connecting block 16, etc. The components are connected; the central axis 6 refers to the tapered water flow channel, which is connected with the nozzle 2 and the water inlet pipe 13; the sealing ring 7 refers to the O-ring, which is fixed in the groove of the rotary valve 11 23; the bearing 8 refers to a rolling bearing, which is fixed on the central axis 6; the air inlet pipe 9 refers to a pipe joint connected with the gun body 5, which is connected with an external air source, and the airflow switch 10 is fixed on the inlet On the trachea 9; the air flow switch 10 refers to the air flow control valve of compressed air, which is fixed on the intake pipe 9; the rotary valve 11 refers to an annular sleeve, which is fixed on the central axis 6 through a bearing 8 above; the air inlet 21 refers to the elliptical air hole on the rotary valve 11, which communicates with the air intake pipe 9; The hole is connected; the groove 23 refers to the semicircular slot hole on the rotary valve 11, which is the fixed part of the sealing ring 7; the stop block 12 refers to a slender cylinder, which is fixed on the rotary valve 11 Described water inlet pipe 13 refers to the connecting pipe of fire-fighting water, and it links with rear seat 15; Described water flow switch 14 refers to the control valve that connects or cuts off the external water source, and it is fixed on the water inlet pipe 13; The back seat 15 refers to a cylinder with a boss, which is fixed on the gun body 5 and is connected with the water inlet pipe; the connecting block 16 refers to an annular casing, which is fixed on the gun body 5, And connect with fixed nut 17 and spring 18; Described button switch 19 refers to the cylindrical body of band protrusion, and it is used together with block 12, and is installed on gun body 5 by connecting block 16, fixed nut 17, spring 18 On; the retaining ring 20 refers to a metal ring, which is fixed on the shaft and connected with the bearing 8.

Installation sequence: the inner core 4 is fixed on the nozzle 2 through the nozzle 3 to form the outlet end part; the sealing ring 7 and the block 12 are fixed on the rotary valve 11, the rotary valve 11 is installed on the bearing 8, and the retaining ring 20 connects the bearing 8 is fixed on the central axis 6, and the central axis 6 is connected with the back seat 15 to form an inlet end part; after the nozzle 2 in the outlet end part is connected with the central axis 6 in the inlet end part, it forms the inner core part of the gun body, and then Be fixed on the gun body 5 by the back seat 15; The button switch 19 is connected with the connection block 16 by the fixed nut 17 and the spring 18, and the connection block 16 is fixed on the gun body 5; Link; water inlet pipe 13 is linked with water flow switch 14, backseat 15; nozzle casing 1 is linked with gun body 5.

The pulse dual-fluid water mist fire extinguishing gun of the present invention proceeds from the basic principle of fire extinguishing, improves various deficiencies of existing products such as low water utilization rate and low fire extinguishing efficiency, and has the following advantages:

①. Due to the use of compressed air to directly atomize direct-flow water, a dual-fluid water mist fire extinguishing medium with a suitable particle size is formed, which not only greatly reduces the particle size of water particles, but also has a greater impact force, which improves the fire extinguishing efficiency;

②. Since the compressed air has a large impact force, the fire extinguishing kinetic energy is large and the impact force is strong, and the flame is directly cut off from the root of the fire source in the horizontal direction to achieve the purpose of rapid fire extinguishing;

③.Using mechanical means to achieve airflow pulse effect, low cost, convenient and reliable;

④. Due to the compressibility of air, short-time pulse compression can further increase the instantaneous pressure of air, increase the impact of fire extinguishing, and improve the efficiency of extinguishing "little sparks";

⑤. Because only the compressed air is pulse-controlled, the water flow is always in a spray state, which suppresses the phenomenon of "re-ignition" that may occur in a high-temperature environment;

⑥. The inner and outer water flow structures are adopted, which greatly improves the fire extinguishing efficiency; the inner water mist particle size is small, and the vaporization speed in the flame area is fast, which can quickly reduce the temperature of the flame area, and because the water mist vaporizes a large amount of Water vapor quickly reduces the oxygen content around the flame and improves the fire extinguishing efficiency; the compressed air in the outer ring has a greater impact force, which can directly cut off the root of the flame, and the fire extinguishing speed is fast, and it also reduces the fine water mist particles in the inner ring in the air. friction loss, transport it to the combustion area over a long distance, reduce the temperature of the flame area, and greatly improve the fire extinguishing efficiency;

⑦. It has strong fire extinguishing ability for solid fire, oil fire and AB compound fire. This rapid water mist fire extinguishing method is also suitable for electrical fire fighting;

⑧.Manual control, easy operation and wide application;

Therefore, the pulse dual-fluid water mist fire extinguishing gun has the advantages of strong fire extinguishing impact, small water mist particle size, small water flow loss, good pulse effect, strong fire control ability, and good fire extinguishing effect. It is a new type of efficient and clean fire extinguishing equipment. It is used for quick fighting of solid fire, oil fire and its compound fire and electrical fire in civil buildings and industrial and mining enterprises.

Description of drawings

Fig. 1 is the mechanical structure schematic diagram of pulse two-fluid water mist fire extinguishing gun;

Fig. 2 is the outlet end component figure of pulse two-fluid water mist fire extinguishing gun;

Fig. 3 is the inlet end component diagram of pulse two-fluid water mist fire extinguishing gun;

Fig. 4 is a longitudinal sectional view of the gun body 5;

Fig. 5 is the front view of rotary valve 11;

FIG. 6 is a cross-sectional view of the rotary valve 11 along the line A-A.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of the mechanical structure of a pulsed two-fluid water mist fire extinguisher, in which, 1 is the nozzle sleeve, 2 is the nozzle, 3 is the nozzle, 4 is the inner core, 5 is the gun body, 6 is the shaft, and 7 is the seal ring, 8 is the bearing, 9 is the intake pipe, 10 is the air flow switch, 11 is the rotary valve, 12 is the block, 13 is the water inlet pipe, 14 is the water flow switch, 15 is the back seat, 16 is the connection block, 17 is the fixed nut , 18 are springs, 19 are button switches, and 20 are retaining rings. Nozzle casing 1 is installed on the front end of the gun body 5; Nozzle 2 is installed on the front end of the central axis 6, and is connected with the nozzle 3 and the inner core 4; the nozzle 3 is installed on the front end of the inner core 4 and fixed on the nozzle 2; the inner core 4 With four circular holes, the inner core 4 is installed on the shower head 2; the gun body 5 is the shell part of the present invention, and it is connected with the sleeve pipe 1, the shower head 2, the air intake pipe 9, the rotary valve 11, the back seat 15, the connection block 16 The central axis 6 is connected with the nozzle 2, the water inlet pipe 13 and the back seat 15; the sealing ring 7 is an O-shaped sealing ring, which is fixed on the groove 23 of the rotary valve 11; the bearing 8 is a rolling bearing, which is fixed in the middle On the shaft 6; the air intake pipe 9 refers to a pipe joint connected with the gun body 5, which is connected with an external air source, and the air flow switch 10 is fixed on the air intake pipe 9; the air flow switch 10 refers to the air flow control valve of compressed air, which is fixed On the intake pipe 9; the rotary valve 11 is installed on the bearing 8, and is fixed on the central axis 6 by the bearing 8; the rotary valve 11 also has an air inlet 21 and a water inlet 22; the air inlet 21 is communicated with the inlet pipe 9; The water hole 22 communicates with the round hole of the center shaft 6; the stop block 12 is fixed on the rotary valve 11; the water inlet pipe 13 is the connecting pipe of the fire-fighting water, which is connected with the rear seat 15; the water flow switch 14 is the control for turning on or cutting off the external water source Valve, which is fixed on the water inlet pipe 13; the back seat 15 is fixed on the gun body 5, and is connected with the water inlet pipe; the connecting block 16 is fixed on the gun body 5, and is connected with the fixed nut 17 and the spring 18; the button switch 19 passes through The fixed nut 17 and the spring 18 are connected with the connecting block 16, and the connecting block 16 is fixed on the gun body 5; the button switch 19 is used with the stop block 12; the retaining ring 20 is fixed on the central shaft 6, and the bearing 8 is fixed on the central shaft 6 on. Button switch 19 is connected with connection block 16 by fixed nut 17 and spring 18, and connection block 16 is fixed on the gun body 5; Air intake pipe 9 and airflow switch 10 are connected with gun body 5; The seat 15 is connected; the nozzle casing 1 is connected with the gun body 5 .

Fig. 2 is the component diagram of the outlet end of the pulse two-fluid water mist fire extinguishing gun, wherein, 2 is a spray nozzle, 3 is a nozzle pipe, and 4 is an inner core. The inner core 4 is fixed on the nozzle 2 through the nozzle 3 to form an outlet end part;

Fig. 3 is a diagram of the inlet end parts of the pulse two-fluid water mist fire extinguisher, wherein, 6 is the central shaft, 7 is the sealing ring, 8 is the bearing, 11 is the rotary valve, 12 is the block, 15 is the back seat, and 20 is the gear lock up. Both the seal ring 7 and the block 12 are fixed on the rotary valve 11, the rotary valve 11 is installed on the bearing 8, the retaining ring 20 fixes the bearing 8 on the central shaft 6, and the central shaft 6 is connected with the rear seat 15 to form the inlet port Components; after the nozzle 2 in the outlet part is connected with the axis 6 in the inlet part, the inner core part of the gun body is formed, and then fixed on the gun body 5 through the back seat 15; Fig. 4 is a longitudinal sectional view of the gun body 5.

FIG. 5 is a front view of the rotary valve 11; wherein, 21 is an air inlet hole, and 22 is a water inlet hole; FIG. 6 is an A-A sectional view of the rotary valve 11. 21 is an air inlet, 22 is a water inlet, and 23 is a groove, and the groove 23 is a fixed part of the sealing ring 7 .

The present invention adopts screw thread to install nozzle casing 1 on the front end of gun body 5, and the airflow injection angle and distance of the outer ring can be controlled by adjusting the position between the two; 3 is connected with the inner core 4, which is the water flow divider of the inner and outer rings. The air flow of the outer ring is introduced into the water flow of the inner ring through four oblique holes with a diameter of 3 mm. By changing the distance between the nozzle 2 and the central axis 6 The distance to adjust the size of the outer ring nozzle, and then control the outer ring air velocity; the nozzle 3 refers to the cylindrical sleeve installed on the front end of the inner core 4 and fixed on the nozzle 2, it is the water outlet part of the inner core 4, and the nozzle 2 are threadedly connected; the inner core 4 is a water flow atomizer, and the water flow is atomized twice through the rotating hole to reduce the particle size of the water mist; the gun body 5 refers to the shell part of the present invention, and it is connected with the sleeve pipe 1, Nozzle 2, air intake pipe 9, rotary valve 11, back seat 15, connecting block 16 and other components are connected; central axis 6 is a water flow channel, the front end is connected with the nozzle 2, and the rear end is connected with the back seat 15; the sealing ring 7 refers to the O-shaped sealing ring fixed on the rotary valve 11; the bearing 8 refers to the rolling bearing fixed on the central shaft 6; the intake pipe 9 refers to the connection of the compressed air connected with the gun body 5; Fixed on the intake pipe 9, the valve switch that connects or cuts off the compressed air source, it controls the opening or closing state of the valve by rotating the handwheel; the water inlet pipe 13 refers to the connection of the fire water connected to the rear seat 15; the water flow switch 14 refers to the valve switch fixed on the water inlet pipe 13 to connect or cut off the external water source, and the valve is opened or closed by rotating the hand wheel; the back seat 15 refers to the cylindrical structure part with the protrusion, which is fixed by thread On the gun body 5, it is threadedly connected with the central shaft 6 and the water inlet pipe 13 respectively; the rotary valve 11 refers to the ring-shaped casing fixed on the central shaft 6 through the bearing 8, and is divided into two parts by a partition on the side of the ring. There are many small chambers, only half of which communicate with the elliptical air intake hole 21 on the rotary valve 11. Therefore, when the rotary valve 11 is driven by the compressed air ejected from the intake pipe 9 to rotate rapidly, the airflow in the outer ring is periodically connected. Open and closed, so as to realize the pulse jet of airflow in the outer ring, and improve the extinguishing efficiency of "little sparks". entrance; the groove 23 refers to the semicircular slot hole on the rotary valve 11, which is the fixed part of the sealing ring 7; Cylinder; Rear seat 15 refers to the cylindrical structure part with protruding platform, and it is fixed on the gun body 5, links with water inlet pipe 13; The connecting block 16, the fixing nut 17, and the spring 18 are fixed on the gun body 5. When the button switch 19 is pressed in, the rotary valve 11 is forced to stop due to the movement of the block 12 being blocked, and the compressed air is in a fully connected state. Strengthen the extinguishing effect on high-power fire sources; when the button switch 19 is ejected, there is no contact between the button switch 19 and the block 12, and the rotary valve 11 rotates rapidly under the action of compressed air, forming a Periodic pulsed air flow strengthens the disturbance to the air flow and strengthens the effect of extinguishing small sparks; the retaining ring 20 refers to the metal ring fixed on the central shaft 6, which is connected with the bearing 8;

The nozzle pipe 3 fixes the inner core 4 to the front end of the nozzle 2 through threads to form an outlet end part; the sealing ring 7 is installed on the rotary valve 11, and the stopper 12 is also fixed on the rotary valve 11, and the rotary valve 11 is installed on the bearing 8, The retaining ring 20 fixes the bearing 8 on the central shaft 6, and the central shaft 6 is connected with the rear seat 15 to form the inlet end part; after the nozzle 2 in the outlet end part is connected with the central shaft 6 in the inlet end part, the gun body is formed The internal core components are fixed on the gun body 5 through the back seat 15; the button switch 19 is connected with the connecting block 16 through the fixing nut 17 and the spring 18, and the connecting block 16 is fixed on the gun body 5; the air intake pipe 9 and the air flow switch 10 It is connected with the gun body 5; the water inlet pipe 13 is connected with the water flow switch 14 and the back seat 15; the nozzle sleeve 1 is connected with the gun body 5;

The working process of the pulse dual-fluid water mist fire extinguishing gun of the present invention is as follows: the operator uses a fire-fighting water delivery pipe to connect the water inlet pipe 13 with an external water source, turns on the water flow switch 14, and most of the fire-fighting water enters through the back seat 15 and the inner cavity of the central shaft 6 In the inner cavity of the nozzle 2, air atomization is carried out under the action of compressed air, and the inner core 4 is further rotated and atomized and then sprayed out from the nozzle 3; After water hole 22 enters in the outer circle of gun body, sprays out by the outer cavity of shower head 2 after atomizing with compressed air. A hose is used to connect the intake pipe 9 with an external compressed air source. After the airflow switch 10 is turned on, the high-pressure air will drive the rotary valve 11 to rotate quickly. Since a series of intake holes 21 are designed on the side wall of the rotary valve 11, a pulse type airflow. Most of the compressed air is sprayed out from the outer cavity of the nozzle 2 after mixing a small amount of fire-fighting water in the outer ring of the water gun; a small amount of compressed air enters the inner cavity of the nozzle 2 through the inclined hole of the nozzle 2, and after atomizing the fire-fighting water, it is sprayed by the nozzle 3 squirt. Therefore, the two-fluid fire extinguishing medium mixed with water and gas with relatively large impact force is quickly ejected from the nozzle 2 and nozzle 3 at the exit of the fire extinguishing gun. powerful. The operator aims the fire extinguisher at the root of the fire source and sweeps back and forth, and uses the water source with strong impact to quickly cut off the flame, so as to play the role of the pulse dual-fluid water mist fire extinguisher in efficient and rapid fire extinguishing.

For the initial high-power fire source, the continuous water mist has strong fire control ability and high fire extinguishing efficiency. After the operator presses the button switch 19, the movement of the rotary valve 11 is blocked, and the compressed air is always connected. The source has better fire extinguishing effect.

For the "little spark" in the later stage of fire extinguishing, it is necessary to adopt a pulse fire extinguishing method. After the button switch 19 is flicked, the rotary valve 11 rotates rapidly in the water gun under the impact of compressed air to form a pulse type two-fluid fire extinguishing medium. This pulse fire extinguishing method is very important. The combustion air flow produces a large air disturbance, which has a good extinguishing effect on "little sparks".

Claims (4)

1. pulse double-fluid water fog extinguishing gun, it is characterized in that this fire gun comprises shower nozzle sleeve pipe (1), shower nozzle (2), jet pipe (3), inner core (4), rifle body (5), axis (6), sealing ring (7), bearing (8), air inlet pipe (9), AFS (10), rotary valve (11), link stopper (12), water inlet pipe (13), water flow switch (14), back seat (15), contiguous block (16), hold-down nut (17), spring (18), press button (19), ring washer (20), air admission hole (21), inlet opening (22);

Shower nozzle sleeve pipe (1) is installed in rifle body (5) front end;

Shower nozzle (2) is installed in axis (6) front end;

Jet pipe (3) is installed in inner core (4) front end and is fixed on the shower nozzle (2);

Inner core (4) has four circular holes, and inner core (4) is installed on the shower nozzle (2);

Rifle body (5) is a case member of the present invention, and it and sleeve pipe (1), shower nozzle (2), air inlet pipe (9), rotary valve (11), back seat (15), contiguous block (16) link;

Axis (6) and shower nozzle (2) and water inlet pipe (13) and back seat (15) link;

Sealing ring (7) is fixed on the rotary valve (11);

Bearing (8) is fixed on the axis (6);

Air inlet pipe (9) is meant the one section pipe joint that links with rifle body (5);

AFS (10) is compressed-air actuated control damper door, and AFS (10) is fixed on the air inlet pipe (9);

Rotary valve (11) is installed on the bearing (8), is fixed on the axis (6) by bearing (8); Rotary valve (11) is gone up also has air admission hole (21) and inlet opening (22); Air admission hole (21) is communicated with air inlet pipe (9); Inlet opening (22) is communicated with axis (6) circular hole;

Link stopper (12) is fixed on the rotary valve (11);

Water inlet pipe (13) is the access tube of fire water, and water inlet pipe (13) links with back seat (15);

Water flow switch (14) is the by-pass valve control that switches on or off external water source, and water flow switch (14) is fixed on the water inlet pipe (13);

Back seat (15) is fixed on the rifle body (5);

Contiguous block (16) is fixed on the rifle body (5), and connects with hold-down nut (17) and spring (18);

Press button (19) links with contiguous block (16) by hold-down nut (17) and spring (18), and contiguous block (16) is fixed on the rifle body (5); Press button (19) and the supporting use of link stopper (12);

Ring washer (20) is fixed on the axis (6), and bearing (8) is fixed on the axis (6).

2. pulse double-fluid water fog extinguishing gun according to claim 1 is characterized in that, described sealing ring (7) is the O RunddichtringO.

3. pulse double-fluid water fog extinguishing gun according to claim 1 is characterized in that, described bearing (8) is a rolling bearing.

4. pulse double-fluid water fog extinguishing gun according to claim 1 is characterized in that, contains fluted (23) on the described rotary valve (11), and groove (23) is the fixed position of sealing ring (7).

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