MIXED JET FLOW FIRE EXTINGUISHING SYSTEM

Abstract

Disclosed is a mixed jet flow fire extinguishing system, including a water spray nozzle and a powder spray nozzle. A water spray port of the water spray nozzle and a powder spray port of the powder spray nozzle do not overlap; super absorbent resin powder sprayed from the powder spray nozzle is externally mixed in the air with a water flow sprayed from the water spray nozzle. A powder spray direction A of the powder spray nozzle is inclined relative to a water flow spray direction B of the water spray nozzle. The technical bottleneck of using sodium polyacrylate resin powder as a fire extinguishing agent in the prior art is solved, so that the sodium polyacrylate resin powder can be smoothly and continuously sprayed into a fire, without blocking the powder spray port.

Claims

1. A mixed jet flow fire extinguishing system, comprising a water spray nozzle and a powder spray nozzle, wherein a water spray port of the water spray nozzle and a powder spray port of the powder spray nozzle do not overlap, and a powder spray direction of the powder spray nozzle is inclined relative to a water flow spray direction of the water spray nozzle.

2. The fire extinguishing system according to claim 1, wherein super absorbent resin powders sprayed from the powder spray nozzle is externally mixed in an air with a water flow sprayed from the water spray nozzle.

3. The fire extinguishing system according to claim 2, wherein the super absorbent resin powders are sodium polyacrylate resin powders.

4. The fire extinguishing system according to claim 1, wherein the water spray nozzle and the powder spray nozzle are separately disposed or integrally disposed.

5. The fire extinguishing system according to claim 1, wherein the powder spray nozzle is disposed above or on a side of the water spray nozzle.

6. The fire extinguishing system according to claim 1, wherein a position of the powder spray port is behind a position of the water spray port.

7. The fire extinguishing system according to claim 1, wherein the water spray nozzle is a part of a fire extinguishing water cannon, a fire extinguishing water hose or a fire extinguishing water gun, is connected with a water spray pipe, and is capable of spraying a high-pressure water flow or a water mist.

8. The fire extinguishing system according to claim 1, wherein the powder spray nozzle is connected with a powder spray pipe, the powder spray pipe is connected with a powder storage tank, and the powder storage tank is connected with a high-pressure air source.

9. The fire extinguishing system according to claim 1, wherein a number of the powder spray nozzle is two or more.

10. A mixing method of a super absorbent resin powder fire extinguishing agent and water, the mixing method comprising spraying, by a water spray port of a water spray nozzle, a water flow, and spraying, by a powder spray port of a powder spray nozzle that does not overlap with the water spray port, super absorbent resin powders, wherein a spray direction of the super absorbent resin powders obliquely intersects with a spray direction of the water flow.

11. The mixing method according to claim 10, wherein the super absorbent resin powders sprayed from the powder spray nozzle are externally mixed in an air with the water flow sprayed from the water spray nozzle.

12. The mixing method according to claim 10, wherein the super absorbent resin powders are sodium polyacrylate resin powders.

13. The mixing method according to claim 10, wherein the super absorbent resin powders are sprayed into the water flow from above, on a side of, or behind the water spray port of the water spray nozzle.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG. 1 is a structural schematic diagram of a multi-phase jet flow water cannon in the prior art;

[0041] FIG. 2 is a structural schematic diagram of a multi-phase jet flow water gun in the prior art;

[0042] FIG. 3 is a structural schematic diagram of a water cannon with multiple spray pipes separated in the prior art;

[0043] FIG. 4 is a structural schematic diagram of a water cannon with multiple spray pipes separated in the prior art;

[0044] FIG. 5 is a structural schematic diagram of a water gun with multiple spray pipes separated in the prior art;

[0045] FIG. 6 is a structural schematic diagram of an embodiment of a fire extinguishing system of the present disclosure;

[0046] FIG. 7 is a structural schematic diagram of another embodiment of a fire extinguishing system of the present disclosure;

[0047] FIG. 8 is a schematic diagram of a position of a spray port of another embodiment of a fire extinguishing system of the present disclosure; and

[0048] FIG. 9 is a schematic diagram of a position of a spray port of another embodiment of a fire extinguishing system of the present disclosure.

DESCRIPTION OF THE EMBODIMENTS

[0049] The embodiments of the present disclosure are described in detail below. The following embodiments are implemented on the premise of the technical solution of the present disclosure, and give detailed implementation methods and specific operation procedures. However, the protection scope of the present disclosure is not limited to the following embodiments.

[0050] With reference to FIG. 6, the present disclosure relates to the technical field of fire extinguishing equipment, and discloses a mixed jet flow fire extinguishing system, including a water spray nozzle 1 and a powder spray nozzle 2, a water spray port 3 of the water spray nozzle 1 and a powder spray port 4 of the powder spray nozzle 2 do not overlap, a powder spray direction A of the powder spray nozzle 2 is inclined relative to a water flow spray direction B of the water spray nozzle 1, and super absorbent resin powders sprayed from the powder spray nozzle 2 is externally mixed in the air with a water flow sprayed from the water spray nozzle 1.

[0051] Generally speaking, a fire extinguishing system or a fire extinguishing device includes several components, such as water pump, high-pressure pump, pipeline, valve, water connection port, control device, etc. However, for the present disclosure, it only includes two core parts, i.e., a powder spray device and a water spray device. As long as the two devices are matched properly, the objective of the present disclosure can be achieved. Previous experiments of our company were mainly carried out around the modification of the mixed jet flow equipment in the prior art. Since the mixed jet flow equipment in which dry powder and high-pressure water jet are sprayed together to extinguish fire has already exist in the prior art, if similar equipment could be used directly, the development cost is omitted, and the experiment cost is very low. However, after a series of experiments and replacement of several types of super absorbent resins in the process, the spray effect could not be achieved well. The key problem is that the existing three-phase or two-phase mixed jet flow fire extinguishing equipment is in a structure where the water spray port and the powder spray port are nested with each other, water spraying and the powder spraying are carried out at the same time, and the water and the powders are wrapped around each other and sprayed out. Since the high-pressure water jet has a very high pressure, the collision between the water lines is relatively intense, and the splashed water is very easy to enter around the powder spray port. Additionally, compared with the existing powder fire extinguishing agents, the biggest difference of the super absorbent resin powders is that it is neither soluble in water nor hydrophobic, and after encountering water, they rapidly swell with the viscosity increasing rapidly to become gel-like, and gradually become solid gel to seal the inner wall surrounding the powder spray port 4 and eventually completely close the powder spray port, resulting in that the resin as the fire extinguishing agent cannot be sprayed out.

[0052] For this problem, we creatively set the powder spray nozzle 2 independently outside of the water spray nozzle 1, and two spray ports of the nozzles do not overlap and are separated by a certain distance. The super absorbent resin powders, especially sodium polyacrylate resin powders, can be directly sprayed to the high-pressure water jet from the outside, and can be rapidly added into the water flow and fly to the fire site with the water flow together due to excellent water absorption rate of sodium polyacrylate resin powders. The resin powders will not be scattered around under the strong negative pressure of the high-pressure water jet, which can well deal with the problem of unstable air flow in the fire site. If only from the perspective of mixing of two substances, the mixing effect of the fire extinguishing system of the present disclosure is not necessarily better than that of the existing pipe-in-pipe type mixed jet flow system, but the present disclosure solves the problem existed when the mixed water cannon uses new fire extinguishing agent powder in the prior art, and achieves an excellent technical effect when using the super absorbent resin powders, especially sodium polyacrylate resin powders, as a fire extinguishing agent, giving a full play of characteristics of sodium polyacrylate resin powders. Even if the mixing is not very well at the beginning, during the process of the water jet reaching the fire site, sodium polyacrylate will still absorb a large amount of water molecules of the water jet, and will continue to absorb water molecules after being attached to a fire object, until it absorbs 300-500 or more times its volume.

[0053] A powder spray direction A of the powder spray nozzle 2 is inclined relative to a water flow spray direction B of the water spray nozzle 1. Herein, the term “spray direction” refers to a direction in which the super absorbent resin powders are sprayed out at the powder spray port and a direction in which the water flow is sprayed out at the water spray port. That is, the direction in which the powders are actually sprayed out and the direction in which the water flow is actually sprayed out should be intersecting. Otherwise, the powders will inevitably produce some unnecessary loss when the powders are under the action of pressurized air. The actual shapes and travelling paths of the powder spray pipe and the water spray pipe before spraying are not our main concerns. Theoretically, the actual spray directions of the powders and the water flow are relatively easy to determine from the shape and structure of the device. For example, referring to FIG. 6 and FIG. 7, it is very easy to see from the appearance and shape that the water spray nozzle 2 is inclined relative to the water spray nozzle 1, and if the internal structure is a normal symmetrical design, the spray direction of the powders and the water flow can be determined. The design of the present disclosure is actually to allow the resin powders sprayed from the powder spray port 4 to be obliquely sprayed from a side or behind to the side of the high-pressure water jet, so that the floating powders can be attracted, by the negative pressure generated by the high-pressure water jet, to the liquid surface of the water jet to the maximum extent. In some cases, the shape of the powder spray nozzle 2 may not be very irregular, but this does not affect the spraying of the powders along its axial direction, and it is possible to ensure as far as possible that the shape of the powder spray channel formed inside the powder spray nozzle 2 is completely symmetrical, and thus the spray direction is relatively easy to determine. Even if the shape of the spray port or the shape of the spray pipe is not symmetrical in some cases, there should also be such a powder spray direction A, which can indicate the direction of spraying of the powders.

[0054] Preferably, the super absorbent resin powders are sodium polyacrylate resin powders. According to the experiments of our company, not all super absorbent resin powders can achieve the optimal fire extinguishing effect. The effects of water absorption, mixing and state transition between various super absorbent resin powders are significantly different, and when the super absorbent resin powders after absorbing water are sprayed to the fire site, the fire extinguishing effect is different. The indicators such as water absorption rate, water absorption multiple, viscosity, and density of sodium polyacrylate resin powders are in good agreement with the fire extinguishing system and the mixing method of the present disclosure, thereby achieving excellent fire extinguishing effect.

[0055] The water spray nozzle 1 and the powder spray nozzle 2 may be disposed independently in a split mode or disposed in an integrated mode. Referring to FIG. 6 and FIG. 7, the water spray nozzle 1 and the powder spray nozzle 2 generally refer to a part of the water spray device close to the water spray port 3 and a part of the powder spray device close to the powder spray port 4. In the split mode, the powder spray nozzle 2 is independently disposed outside the water spray nozzle 1, and there is a buffer space between spray ports of the two nozzles, which can prevent most of the splashed water drops from being sprayed to the powder spray port, solving the problem of gel blocking the powder spray port. And this separated-type structure is simple to manufacture, simple to maintain, and simpler to replace a component.

[0056] Referring to FIG. 8, in the integrated mode, through a reasonable design, the water spray port and the powder spray port may still be separated by a certain distance and the volume is reduced, and at the same time, the structure of the whole system is very simple, and the appearance is beautiful. It is not easy to, for example, change positions of the spray heads or damage them during training, transporting and fire extinguishing process of the equipment.

[0057] Referring to FIGS. 6-9, the powder spray nozzle 2 is disposed above or on a side of the water spray nozzle 1. The super absorbent resin powders are sprayed into the water flow from above and a side of the water spray port 3 of the water spray nozzle 1. This design mainly takes an actual working process of the high-pressure water cannon into account, where the angle of use of the water cannon is generally obliquely upward, and upon the high-pressure water cannon opens a valve, there is a process of opening the valve and there is no residual water in the pipeline. So it will cause the high-pressure water jet to not be formed instantaneously at the beginning, but from weak to strong. This process usually causes the water flow in the water cannon to flow directly to be under the water spray nozzle 1. In addition, when the high-pressure water cannon just finishes spraying, the valve needs to be closed gradually. During closing process of the valve, the pressure and the water volume in the pipeline gradually decrease until the finally sprayed water jet falls directly due to insufficient pressure, which will cause this part of the water flow to drop directly to be under the water spray nozzle 1. If the powder spray port 2 is disposed below, it is easy to cause the blockage of the powder spray port 2.

[0058] Referring to FIG. 7, the position of the powder spray port 4 is behind the position of the water spray port 3. The super absorbent resin powders are sprayed into the water flow from behind the water spray port 3 of the water spray nozzle 1. This design can effectively lengthen the distance between the powder spray port 4 and the water spray port 3, and set the easily blocked powder spray port in a place where water droplets cannot be splashed, substantially eliminating the problem of the blockage of the powder spray port 4. The reason why this design can be realized mainly lies in that the powder spraying itself has a certain pressure, which can ensure that the powders do not cause large-scale dispersion in a short distance. The second reason is that the resin powders with light density may be attracted well under the strong negative pressure of the high-pressure water jet. In this way, the advantages of the external powder-internal water mode and the sodium polyacrylate resin powders can be fully utilized, and the shortcoming of easy blockage of the outlet can be avoided.

[0059] The water spray nozzle 1 is a part of a fire extinguishing water cannon, a fire extinguishing water hose or a fire extinguishing water gun, and is connected with a water spray pipe 5, to spray high-pressure water flow or water mist. Referring to FIGS. 6 and 7, it can be seen that the fire extinguishing system of the present disclosure may actually be obtained from modification of most existing fire extinguishing devices. No matter what kind of water cannon or water gun is originally, a separate powder spray pipe may be added, thereby getting the fire extinguishing system of the present patent. This is also a major contribution of the present disclosure. It is not simply putting two existing equipment together, but according to the characteristics of the fire extinguishing agent, an optimally combined configuration method is selected in the existing fire extinguishing devices, where the powder spray device is separated from the pipe-in-pipe type mixed jet flow equipment and disposed in an optimal position, so that when the sodium polyacrylate resin powders are used as a fire extinguishing agent, they can exert their maximum efficacy and minimize the cost of the whole system.

[0060] Referring to FIG. 7, the powder spray nozzle 2 is connected with a powder spray pipe 6, the powder spray pipe 6 is connected with a powder storage tank 7, and the powder storage tank 7 is connected with a high-pressure air source 8. This is also a configuration of a conventional powder spray device of mixed jet flow equipment, but the present disclosure can set this part independently outside the water spray device. The existing pipe-in-pipe type mixed jet flow equipment has a complicated structure and troublesome maintenance and disassembly. Of course, directly connecting with other type of powder supply device does not affect the effect of the present disclosure, the core of which is still that the fire extinguishing agent sprayed by the powder spray device may be sprayed to the water jet.

[0061] Referring to FIG. 9, the number of the powder spray nozzle 2 is two or more. On one hand, it can increase the amount of fire extinguishing resin powders sprayed per unit time, and it can also spray the resin powders into the water flow more uniformly. When using certain types of super absorbent resin powders, such as those with a slower water absorption rate, the fire extinguishing effect may be improved.

[0062] In addition, the present disclosure further provides a mixing method of a super absorbent resin powder fire extinguishing agent and water, where spraying, by a water spray port of a water spray nozzle, the water flow, and spraying, by a powder spray port of a powder spray nozzle that does not overlap with the water spray port, super absorbent resin powders, where a spray direction of the super absorbent resin powder obliquely intersects with a spray direction of the water flow.

[0063] What is embodied herein is the revolutionary advantage of the present disclosure over the prior art in mixing method. There is no document in the prior art that mentions this use method of the super absorbent resin powder fire extinguishing agent. The present disclosure abandons the existing use method in which the super absorbent resin needs to be premixed, but directly mixes the two substances in the air, which is equivalent to that the powders are directly hit into the water jet in the air. The super-fast water absorption rate of the sodium polyacrylate powders is fully utilized, and the premixing procedure is omitted. The spraying speed of the high-pressure water jet in the fire extinguishing water cannon is the casting speed of the fire extinguishing agent. The whole mixing process is fast and continuous, abandoning the traditional design thinking of spraying together with the water wrapping the powders in the prior art. By the design of intersecting negative pressure direction and spray direction, a technical solution of the powder hitting water and spraying together is creatively adopted, without powder floating around. In addition, the water spray port and the powder spray port are separated by a certain distance, so that the impact of the splashed water on the powder spray port is reduced to a very low level, the fire extinguishing effect is good and the blockage will not occur.

[0064] Preferably, the super absorbent resin powders are sodium polyacrylate resin powders. The super absorbent resin powder sprayed from the powder spray nozzle is externally mixed in the air with the water flow sprayed from the water spray nozzle. The super absorbent resin powders are sprayed into the water flow from above, on a side of, or behind the water spray port of the water spray nozzle. The above-mentioned preferred solution can fully utilize the advantages of the mixing method of external powder-internal water, so that the spraying and mixing are safer without blockage.

[0065] The advantage of the present embodiment is that the technical bottleneck of using sodium polyacrylate resin powders as a fire extinguishing agent in the prior art is solved, so that the sodium polyacrylate resin powders can be smoothly and continuously sprayed into a fire site, without blocking the powder spray port.

[0066] The above descriptions are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. Any modification, equivalent replacement and improvement made within the spirit and the principle of the present disclosure shall be included in the protection scope of the present disclosure.