WO2024027293A1

WO2024027293A1 - Dual-layer jet fire-fighting foam producing and spraying device

Info

Publication number: WO2024027293A1
Application number: PCT/CN2023/095977
Authority: WO
Inventors: 李敏; 张红; 柳金梅
Original assignee: 绿友机械集团股份有限公司
Priority date: 2022-08-05
Filing date: 2023-05-24
Publication date: 2024-02-08
Also published as: CN115463362A

Abstract

A dual-layer jet fire-fighting foam producing and spraying device, comprising a housing (1). A core cylinder (2) is provided in the housing, two protruding portions (21) are provided on the periphery of the core cylinder, and an annular cavity (11) is formed among the two protruding portions, the outer wall of the core cylinder, and the inner wall of the housing; a spraying cylinder (3) is provided at the front end of the core cylinder and passes through the front end of the core cylinder, a support plate (24) is provided inside the core cylinder, a liquid outlet pipe (25) is provided on an inner ring of the support plate and passes through the inner ring of the support plate, and the liquid outlet pipe is connected to an L-shaped elbow (26) outside the core cylinder; the front end of the core cylinder is provided with dual-layer jet holes (22); a P-shaped handle (4) is provided at the top of the housing, the P-shaped handle comprises a transverse pipe (40) having two closed ends and a first vertical pipe (41) and a second vertical pipe (42) which are vertically connected to and communicated with the transverse pipe, the second vertical pipe is connected to a Venturi assembly (5), and the Venturi assembly is connected to the L-shaped elbow (26) and a foam extinguishing agent connecting pipe; a water inlet base (6) is provided at the bottom of the housing, and the water inlet base is connected to a water inlet pipe fitting (7).

Description

A double-layer jet fire-fighting foam foaming injection device

Technical field

The invention relates to a fire-fighting equipment, in particular to a double-layer jet fire-fighting foam foaming and spraying device.

Background technique

After the liquid foam fire extinguishing agent is mixed with water, the fire-extinguishing foam produced can form a well-sealed foam layer on the surface of the object, thereby isolating the air, blocking combustion and or preventing combustion. When a fire occurs, connect the foam fire extinguishing nozzle to a water source that meets the flow requirements. When the water flows through the special passage in the gun body, a negative pressure is formed in the bypass, sucking in and mixing the foam fire extinguishing agent, and finally spraying it out from the nozzle head. Therefore, on the one hand, it is necessary to ensure that the liquid foam fire extinguishing agent is fully mixed with the water flow and fully mixed with the air during the spraying process to achieve a good foaming effect; on the other hand, it is also necessary to consider that the larger the effective range, the better, so as to extinguish the fire efficiently.

Existing foam fire-fighting guns often adopt a simple three-way structure, which has poor foaming effect, large kinetic energy loss of water flow, short spray distance, and is relatively bulky.

Contents of the invention

In view of the shortcomings of existing equipment and technology, the purpose of the present invention is to provide a double-layer jet fire-fighting foam foaming and spraying device, which can improve the foaming effect, increase the spraying distance, improve fire extinguishing efficiency, and reduce the weight of the equipment.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A double-layer jet fire-fighting foam foaming and spraying device includes a cylindrical shell, a cylindrical core tube is provided inside the shell, and two annular protrusions are provided on the outer periphery of the core tube. The outer circumferential sleeve is provided with a sealing ring to form a sealed annular chamber between the two protrusions, the outer wall of the core barrel, and the inner wall of the shell;

The front end of the core barrel is fixedly provided with a nozzle that communicates with the core barrel, and a convex portion close to the nozzle is provided with a number of jet holes that communicate with the annular chamber and the inside of the core barrel; the rear end of the core barrel is connected to the outer casing. The rear end is fixedly connected; the core cylinder is provided with a circular bracket plate inside, and a liquid outlet pipe parallel to the axial direction of the core cylinder is penetrated through the middle of the bracket plate;

The top of the shell is provided with an upper mounting surface, and the upper mounting surface is spaced apart from the corresponding position of the top of the shell. A first through hole is provided, and the first through hole is connected with the annular chamber; a P-shaped handle is installed on the upper mounting surface, and the P-shaped handle includes a transverse tube with both ends closed and a transverse tube connected with the transverse tube. The first vertical pipe and the second vertical pipe are vertically connected and connected, and the transverse plate connecting the first vertical pipe and the second vertical pipe; the first vertical pipe is close to the front end of the shell, and the second vertical pipe is close to the rear end of the shell ; The horizontal plate and the upper mounting surface are fixedly connected by bolts; the first vertical pipe is connected to the first through hole, and a venturi assembly is provided at the bottom of the second vertical pipe; the venturi assembly includes a tee, and the three It has a vertically opposite water inlet, a mixed liquid outlet and a transverse foam liquid inlet; the water inlet is connected and communicated with the bottom end of the second vertical pipe; the foam liquid inlet is connected to the foam fire extinguishing agent connecting pipe;

The liquid outlet pipe is installed inside the core barrel, with one end being a liquid outlet, and the other end being connected to an L-shaped elbow located outside the core barrel. The top end of the L-shaped elbow is connected to the mixed liquid outlet; the bottom of the shell is provided with There is a lower mounting surface, and a second through hole is provided at a position corresponding to the lower mounting surface and the bottom of the housing. The second through hole is connected to the annular chamber; a water inlet base is installed on the lower mounting surface, and the water inlet base is installed on the lower mounting surface. The base is connected to the water inlet pipe.

Further, the jet holes include a first layer of jet holes and a second layer of jet holes. The angle between the first layer of jet holes and the axis of the core barrel is 20° to 24°. The second layer of jet holes The angle between the hole and the axis of the core barrel is 14° to 18°.

Further, the inner cross-sectional area of the rear end of the core barrel is greater than or equal to the through-hole area of the bracket plate, and the through-hole area of the bracket plate is greater than or equal to the inner cross-sectional area of the front end of the core barrel.

Further, the rear end of the spray barrel is inserted inside the front end of the core barrel.

Further, the bracket plate includes an outer ring, an inner ring, connecting ribs between the outer ring and the inner ring, and the liquid outlet pipe is passed through the inner ring of the bracket plate.

The beneficial effects of the present invention are:

1. The present invention mixes liquid foam fire-extinguishing agent and water three times, fully impacts, and has good foaming effect;

2. The two-layer angled jet holes of the present invention are arranged in a staggered manner, taking into account both the range and the foaming effect;

3. The open air inlet of the present invention ensures that the loss of liquid flow energy is small;

4. The invention has compact structure, light weight and is easy to hold.

Description of drawings

Figure 1 is a schematic structural diagram of the double-layer jet fire-fighting foam foaming and spraying device of the present invention.

Figure 2 is an enlarged schematic view of the Venturi component of the double-layer jet firefighting foam spraying device of the present invention.

Figure 3 is an exploded schematic view of the double-layer jet fire-fighting foam foaming and spraying device of the present invention.

Figure 4 is a schematic structural diagram of the jet hole of the double-layer jet fire-fighting foam foaming injection device of the present invention.

Detailed ways

The structure of the present invention and the technical effects to be achieved will be described below with specific embodiments in conjunction with the accompanying drawings. However, the selected embodiments are only for illustration and explanation, and are not intended to limit the scope of the present invention.

As shown in Figures 1, 2, and 3, the present invention provides a double-layer jet fire-fighting foam foaming and spraying device, which includes a cylindrical shell 1, and a cylindrical core 2 is provided inside the shell 1. There are two annular protrusions 21 on the outer circumference of the core barrel 2, and a sealing ring is set on the outer circumference of the two protrusions 21, so that a seal is formed between the two protrusions 21, the outer wall of the core barrel 2, and the inner wall of the shell 1 annular chamber 11.

The front end of the core barrel 2 is penetrated with a nozzle 3 that communicates with the core barrel 2. The protruding portion 21 close to the nozzle 3 is provided with a number of jet holes 22 that communicate with the annular chamber 11 and the inside of the core barrel 2. The water flow can be ejected from the annular chamber 11 into the core cylinder 2 through the jet hole 22 . The rear end of the spray barrel 3 penetrates into the front end of the core barrel 2 .

The rear end of the core barrel 2 is fixedly connected to the rear end of the housing 1 through bolts 23 . The core cylinder 2 is provided with a circular bracket plate 24 inside, and a liquid outlet pipe 25 parallel to the axial direction of the core cylinder 2 is penetrated through the middle of the bracket plate 24 . The front end of the liquid outlet pipe is a liquid outlet, and its rear end is connected to the L-shaped elbow 26 located outside the core tube 2 . Specifically, as shown in FIG. 3 , the bracket plate 24 includes an outer ring 241 , an inner ring 242 , and connecting ribs 243 . The liquid outlet pipe 25 is inserted into the inner ring 242 . Specifically, the core barrel 2 is a variable cross-section inner cavity, and the inner cross-sectional area of its rear end is greater than or equal to the through hole area of the bracket plate 24. The through hole area of the bracket plate 24 is greater than or equal to the inner cross-sectional area of the front end of the core barrel 2. , to ensure smooth air intake, which is beneficial to increasing the range.

The top of the housing 1 is provided with an upper mounting surface 12 , and a first through hole 121 is formed at a position corresponding to the upper mounting surface 12 and the top of the housing 1 . The first through hole 121 is connected to the annular chamber 11 . The upper mounting surface 12 is used to install a P-shaped handle 4. The P-shaped handle 4 includes a two-axis The transverse tube 40 with a closed end and the first vertical tube 41 near the front end of the housing 1 and the second vertical tube 42 near the rear end of the housing 1 are vertically connected to the horizontal tube 40 . A transverse plate 43 is provided between the bottoms of the first vertical pipe 41 and the second vertical pipe 42. The horizontal plate 43 is fixedly connected to the upper mounting surface 12 through bolts. The first vertical pipe 41 is correspondingly connected to the first through hole 121 , and the bottom of the second vertical pipe 42 is connected and communicated with the Venturi assembly 5 . The Venturi assembly 5 includes a tee 50 with a vertically opposite water inlet 51 , a mixed liquid outlet 52 and a transverse foam liquid inlet 53 . The Venturi assembly 5 passes through the water inlet 51 and the second standpipe 42 The foam fire extinguishing agent connecting pipe is connected through the mixed liquid outlet 52 and the L-shaped elbow 26, and the foam liquid inlet 53 is connected.

The bottom of the housing 1 is provided with a lower mounting surface 13 , and a second through hole 131 is formed at a position corresponding to the lower mounting surface 13 and the bottom of the housing 1 . The second through hole 131 is connected to the annular chamber 11 . The lower mounting surface 13 is mounted with a water inlet base 6 , and the water inlet base 6 is connected to the water inlet pipe fitting 7 .

The usage process of the present invention is as follows: the water inlet pipe 7 is connected to the water source pipe, and the foam liquid inlet 53 is connected to the liquid foam fire extinguishing agent through the foam fire extinguishing agent connecting pipe. When water flows through the water pipe and the water inlet base 6, it enters the annular cavity 11, and then enters the P-shaped handle 4. When it flows through the venturi assembly 5 through the second vertical pipe 42, a bypass negative pressure is formed at the tee 50, and the liquid is The foam fire extinguishing agent is inhaled, mixed for the first time at Venturi component 5, and the mixed liquid is sprayed out from the liquid outlet. The core barrel 2 is provided with a jet hole 22, and the main water flow is sprayed from the annular chamber 11 through the jet hole 22, mixed again with the mixed liquid produced by the first mixing, and finally sprayed out from the spray barrel 3. As shown in Figure 4, the jet hole 22 forms a certain angle with the first mixed liquid (horizontal direction). The larger the angle (20° to 24°), the more conducive it is to achieve better foaming effect (i.e. the first time Foaming); and the smaller the angle (14° to 18°), the more conducive to achieving a longer range (i.e. the second foaming). In order to achieve a good balance between the range and the foaming effect, two or more jet holes with different angles can be mixed and interspersed, that is, the jet hole 22 includes a first layer of jet holes 221 and a second layer of jet holes 222. The included angle α between the jet hole 221 and the axis of the core barrel 2 is 20° to 24°, and the included angle β between the second layer jet hole 222 and the axis of the core barrel 2 is 14°. to 18°.

The advantages of the present invention are as follows:

1. The present invention realizes three mixings of liquid foam fire extinguishing agent and water through a special channel design inside the gun body, making the mixing more complete and achieving a good foaming effect. Taking advantage of the Venturi effect When the water flow passes through the bypass, a negative pressure is formed to suck the liquid foam fire extinguishing agent into the passage to achieve the first mixing; the mixed liquid formed by the first mixing collides with the water flow ejected from the first layer of jet holes to achieve the second mixing ( (i.e., the first foaming), and then collides with the water jet from the second layer of jet holes to achieve the third mixing (i.e., the second foaming), and is finally ejected from the nozzle of the gun head;

2. The above-mentioned second mixing is mixed with the water flow ejected from the large-angle jet hole. The significance of the large-angle jet hole is to make the mixed flow impact and mix more fully to ensure a good foaming effect;

3. The third mixing mentioned above is mixed with the water flow ejected from the small angle jet hole. The significance of the small-angle jet hole is to ensure that the kinetic energy loss of the liquid flow is small to ensure the range of the liquid flow.

4. The present invention uses an external P-shaped hollow handle to realize flow diversion, ensuring that the air inlet is completely open and reducing the kinetic energy loss caused by vacuum suction;

5. The present invention uses a hollow P-shaped handle to realize flow diversion, eliminating the need for pipelines, joints and other parts, and reducing weight.

The invention is defined by the claims. However, based on this, those of ordinary skill in the art can make various obvious changes or modifications, which should all be within the main spirit and protection scope of the present invention.

Claims

A double-layer jet fire-fighting foam foaming and spraying device is characterized in that it includes a cylindrical shell, a cylindrical core tube is provided inside the shell, and two annular protrusions are provided on the outer periphery of the core tube. A sealing ring is set around the outer periphery of each protruding part, so that a sealed annular chamber is formed between the two protruding parts, the outer wall of the core barrel, and the inner wall of the shell;

The front end of the core barrel is fixedly provided with a nozzle that communicates with the core barrel, and a convex portion close to the nozzle is provided with a number of jet holes that communicate with the annular chamber and the inside of the core barrel; the rear end of the core barrel is connected to the outer casing. The rear end is fixedly connected; the core cylinder is provided with a circular bracket plate inside, and a liquid outlet pipe parallel to the axial direction of the core cylinder is penetrated through the middle of the bracket plate;

The top of the shell is provided with an upper mounting surface, and a first through hole is provided at a position corresponding to the upper mounting surface and the top of the shell. The first through hole is connected to the annular chamber; a P-shaped handle is installed on the upper mounting surface. On the surface, the P-shaped handle includes a horizontal tube with both ends closed, a first vertical tube and a second vertical tube that are vertically connected and communicated with the horizontal tube, and a horizontal plate connecting the first vertical tube and the second vertical tube; The first vertical pipe is close to the front end of the housing, and the second vertical pipe is close to the rear end of the housing; the horizontal plate and the upper mounting surface are fixedly connected by bolts; the first vertical pipe is connected to the first through hole, and the third vertical pipe is connected to the first through hole. A Venturi assembly is provided at the bottom of the second standpipe; the Venturi assembly includes a tee, which has a vertically opposite water inlet, a mixed liquid outlet, and a transverse foam liquid inlet; the water inlet is connected to the bottom of the second standpipe. The two ends are connected and connected; the foam liquid inlet is connected to the foam fire extinguishing agent connecting pipe;

The liquid outlet pipe is installed inside the core barrel, with one end being a liquid outlet, and the other end being connected to an L-shaped elbow located outside the core barrel. The top end of the L-shaped elbow is connected to the mixed liquid outlet; the bottom of the shell is provided with There is a lower mounting surface, and a second through hole is provided at a position corresponding to the lower mounting surface and the bottom of the housing. The second through hole is connected to the annular chamber; a water inlet base is installed on the lower mounting surface, and the water inlet base is installed on the lower mounting surface. The base is connected to the water inlet pipe. .
The double-layer jet fire-fighting foam foaming and spraying device according to claim 1, characterized in that: the jet holes include a first layer of jet holes and a second layer of jet holes, and the first layer of jet holes is connected to the core tube. The included angle between the axes is 20° to 24°, and the included angle between the second layer jet hole and the axis of the core barrel is 14° to 18°.
The double-layer jet fire-fighting foam foaming and spraying device according to claim 1, characterized in that: the inner cross-sectional area of the rear end of the core tube is greater than or equal to the through hole area of the bracket plate, so The through hole area of the bracket plate is greater than or equal to the inner cross-sectional area of the front end of the core tube.
The double-layer jet fire-fighting foam foaming and spraying device according to claim 1, 2 or 3, characterized in that: the bracket plate includes an outer ring, an inner ring, and a plurality of connecting ribs between the outer ring and the inner ring. The liquid outlet pipe is inserted into the inner ring.