MIXED-SPRAY FIREFIGHTING DEVICE

Abstract

The application discloses a mixed-spray firefighting device, which includes a water nozzle and a powder nozzle. The water nozzle is disposed around an outside of the powder nozzle, and a powder spray port of the powder nozzle is provided behind a water spray port of the water nozzle. A fire-extinguishing agent powder sprayed from the powder nozzle and a water flow sprayed from the water nozzle are mixed in air outside the firefighting device. The fire-extinguishing agent powder is preferably sodium polyacrylate resin powder. The application solves the technical bottleneck of using the sodium polyacrylate resin powder as a fire-extinguishing agent in the prior art, so that the sodium polyacrylate resin powder can be sprayed into a fire field smoothly and continuously without blocking the powder spray port.

Claims

1. A mixed-spray firefighting device, comprising a water nozzle and a powder nozzle, wherein the water nozzle is disposed around an outside of the powder nozzle, and a powder spray port of the powder nozzle is disposed behind a water spray port of the water nozzle.

2. The mixed-spray firefighting device according to claim 1, wherein a fire-extinguishing agent powder sprayed from the powder nozzle and a water flow sprayed from the water nozzle are mixed in air outside the firefighting device.

3. The mixed-spray firefighting device according to claim 2, wherein the fire-extinguishing agent powder is sodium polyacrylate resin powder.

4. The mixed-spray firefighting device according to claim 1, wherein the powder spray port of the powder nozzle and the water spray port of the water nozzle refer to a position where a powder and a liquid are ejected from a closed pipeline and in contact with outside air, respectively.

5. The mixed-spray firefighting device according to claim 1, wherein a distance between the powder spray port of the powder nozzle and the water spray port of the water nozzle in an axial direction is greater than 3 cm.

6. The mixed-spray firefighting device according to claim 1, wherein the powder nozzle further comprises a detachable water blocking jacket provided at a front of the powder nozzle.

7. The mixed-spray firefighting device according to claim 1, wherein a drainage space is provided between a pipe wall of the powder nozzle and a pipe wall of the water nozzle.

8. The mixed-spray firefighting device according to claim 1, wherein an outer sleeve is provided at a front of the water nozzle.

9. The mixed-spray firefighting device according to claim 1, wherein the water nozzle is connected with a water spray pipe and is capable of spraying high-pressure water flow or water mist, the powder 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 gas source.

10. A mixed-spray method of powder fire-extinguishing agent and water, wherein a superabsorbent resin fire-extinguishing agent powder sprayed from a powder spray port of a powder nozzle is sprayed from the powder nozzle and is mixed with a water flow sprayed from a water spray port surrounding the powder nozzle in air outside a water nozzle, and the water nozzle is disposed around an outside of the powder nozzle.

11. The mixed-spray method according to claim 10, wherein the fire-extinguishing agent powder is sodium polyacrylate resin powder.

12. The mixed-spray method according to claim 11, wherein the fire-extinguishing agent powder is sprayed from a rear of a position of the water spray port.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG. 1 is a schematic structural diagram of a multiphase jet water monitor in a prior art;

[0040] FIG. 2 is a schematic structural diagram of a multiphase jet water gun in the prior art;

[0041] FIG. 3 is a schematic structural diagram of a multiphase jet water monitor in the prior art;

[0042] FIG. 4 is a schematic structural diagram of a multiphase jet water monitor in the prior art;

[0043] FIG. 5 is a schematic structural diagram of an embodiment of a firefighting device of the present application;

[0044] FIG. 6 is a schematic diagram of an end face of a spray port location of an embodiment of the firefighting device of the present application the firefighting device;

[0045] FIG. 7 is a schematic diagram of a spray port location of an embodiment of the firefighting device of the present application;

[0046] FIG. 8 is a schematic diagram of a spray port location of an embodiment of the firefighting device of the present invention;

[0047] FIG. 9 is a schematic diagram of a spray port location of an embodiment of the firefighting device of the present invention.

DESCRIPTION OF THE EMBODIMENTS

[0048] Embodiments of the present application are described in detail below. The following embodiments are implemented on the premise of the technical solutions of the present application, and provide detailed implementations and specific operation processes, but the protection scope of the present application is not limited to the following embodiments.

[0049] Referring to FIG. 5, the present application relates to a technical field of firefighting equipment, and discloses and provides a mixed-spray firefighting device, including a water nozzle 1 and a powder nozzle 2. The water nozzle 1 is disposed around an outside of the powder nozzle 2, and a powder spray port 4 of the powder nozzle 2 is provided behind a water spray port 3 of the water nozzle 1.

[0050] Generally speaking, a firefighting device includes several components, such as a water pump, a high-pressure pump, a pipeline, a valve, a water connection, a control device, etc., but as for the present application, it only includes two core parts, that is, a powder jet device and a water jet device. As long as the powder spray device and the water spray device are disposed in proper positions, the inventive objective of the present application can be achieved. The test of our company in the previous period was mainly performed on the transformation of the mixed-jet equipment in the prior art, because in the prior art, there is a mixed-jet equipment in which powder and high-pressure water column are jetted together to extinguish the fire, which saves a development cost and has a very low test cost. However, after a series of tests, and several varieties of superabsorbent resins were replaced halfway, the spraying effect could not be achieved very well. In the existing three-phase or two-phase mixed-jet firefighting equipment, the water spray port and the powder spray port are nested with each other, and the water spraying and the powder spraying are carried out simultaneously, and the water and the powder are wrapped around each other and ejected out. Due to the high pressure of a high pressure water column, a collision between water lines is relatively intense, and the splashing water is very easy to enter the surrounding of the powder jet port. Compared with the existing powder fire-extinguishing agent, the biggest difference of the superabsorbent resin powder is that it is neither soluble in water nor hydrophobic, but rapidly expands when it encounters water and its viscosity increases rapidly, and becomes gel-like; and gradually develops to a solid gel to seal the surrounding inner wall of the powder spray port, and eventually completely seal the powder spray port, resulting in the resin as a fire-extinguishing agent not being ejected. In some cases, for example, when the high-pressure water flow is just sprayed out or just closed, the water flow often flows directly to the powder spray port, and the gel is formed at the spray port to directly seal the powder spray port.

[0051] In response to this problem, we creatively proposed a technical solution to change the position of the powder nozzle from the same plane or substantially the same plane as the water nozzle to a relatively behind position. It should be emphasized that the powder spray port 4 of the powder nozzle 2 and the water spray port 3 of the water nozzle 1 refer to the position where a powder and a liquid are ejected out of a closed pipeline and in contact with the outside air, respectively, and the water spray port 3 may not be a pipe opening for the whole device. In this case, both the water nozzle 1 and the powder nozzle 2 have at least a section of independent pipelines at the front, which can prevent the water flow from being directly sprayed from the outer pipe wall of the powder nozzle 2, thereby causing water splashing near the powder spray port 4. For example, in the firefighting device shown in FIG. 4, although the powder spray port is located behind the pipe opening, it can be clearly seen that a casing pipe is disposed on the head of the water nozzle of the device, so the pipe opening and the water spray port thereof are not coincident with each other; the water spray port is still roughly in the same plane as the powder spray port, and the water flow ejected out of the closed space formed by the pipe wall of the water nozzle and the pipe wall of the powder nozzle can be considered as the water flow being ejected out of the water spray port. According to our experimental conclusions, in the case of entry into an open space from a closed pipeline, the change of pressure will make the high-speed spray water column produce water spray to the greatest extent; meanwhile, the collision water spray generated in the structural change will be more obvious. Under this solution, a configuration in which a water spraying position and a powder spraying position are substantially separated by a certain distance is formed. Although the two spray ports overlap and are relatively close when viewed from an end face, the distance A in the axial direction has been effectively elongated, and the powder spray port 4 has a buffer distance from the water spray port 2 with the most sputtering water spray. Under this design, the fire-extinguishing agent powder, especially sodium polyacrylate resin powder, can still be directly sprayed from the middle to the surrounding high-pressure water column at a high rate under the action of the pressurized gas due to its low density and small particles. Further, due to its excellent water absorption rate, the sodium polyacrylate resin powder can be quickly added to the water flow and fly to the fire site with the water flow. The resin powder will not adhere to the pipe wall in large quantities under the strong negative-pressure traction of high-pressure water column.

[0052] Referring to FIGS. 7-9, a position of the powder spray port 4 is located behind a position of the water spray port 3. The superabsorbent resin powder is sprayed into the water flow from the rear of the water spray port 3 of the water nozzle 1. This design can effectively lengthen a distance between the powder spray port 4 and the water spray port 3, and place the powder spray port that is easy to block in a position where water droplets cannot be splashed, basically eliminating the blockage problem of the powder spray port 4. The reason why this design can be realized is mainly because the powder spray itself has a certain pressure, which can ensure that the powder does not drift away on a large scale in a short distance. Secondly, under the action of the strong negative pressure of the high-pressure water column, the resin powder with a low density can be suction very well. Thirdly, if required, the way of adding a water blocking jacket 11 can be used to relieve the powder from drifting and getting wet. In this way, the advantages of the sodium polyacrylate resin powder can be fully utilized and brought into play and the disadvantages of easily blocking the outlet or backflow can be avoided.

[0053] If only from the perspective of mixing the two substances, the mixing effect of the firefighting device of the present application may not be better than that of the existing casing-type mixed-jet system, but the present application solves the new problem caused by the use of new fire-extinguishing agent powder. Superabsorbent resin powder, especially sodium polyacrylate resin powder, has produced a good technical effect when it is used as a fire-extinguishing agent, giving full play to the characteristics of sodium polyacrylate resin powder. Even if the mixing effect is not perfect due to a large divergence surface at the beginning, in the process of the water column reaching the fire site, sodium polyacrylate powder will still absorb a large amount of water molecules in the water column, and will continue to absorb water molecules after attaching to fire objects, until it absorbs more than 300-500 times of water in volume, achieving an excellent fire-extinguishing effect.

[0054] The superabsorbent resin powder ejected from the powder nozzle 2 is mixed with the water flow ejected from the water nozzle 1 in the air outside the firefighting device. Theoretically, the direction of the powder ejected from the powder spray port 4 should intersect with the direction of the water ejected from the water spray port 3. Under the design of the present application, although the water nozzle 1 is not inclined inward, because the diameter of a water feeding pipe is smaller than that of the water nozzle 1, there is a process of high-speed diffusion outward during the spraying process. In this way, when the high-pressure water flow is sprayed horizontally, the spraying direction of the high-pressure water flow will be refracted by the pipe wall, and will converge slightly towards the central axis of the water nozzle 1, so that the high-pressure water flow can obliquely intersect with the powder sprayed in a straight line from the middle, which is conducive to further mixing of solid and liquid. This situation is more pronounced where an outer sleeve 10 is provided. The internal structure of the water nozzle 1 has many forms, but the final spraying direction of the water flow is inclined with respect to the powder spraying direction. In fact, the high-pressure water column also converges at a certain distance from the pipe opening, so that the resin powder sprayed from the powder spray port 4 can be sprayed onto the high-pressure water column from the middle, so as to maximize the use of a water curtain generated by the high-pressure water column to intercept drifting powder to the surface of the water column. In some cases, the shape of the water nozzle 1 and the shape of the powder nozzle 2 may not be very regular, but this does not affect the spraying of water flow and powder along the direction we designed, and it can be ensured as far as possible that the shapes of spraying passages formed inside the water nozzle 1 and the powder nozzle 2 are completely symmetrical. The water flow and powder are ejected from the water nozzle 1 and the powder nozzle 2 independently, and then collide and are mixed at a certain distance from the pipe opening, which better solves the problem that the powder spray port 4 is sealed by gel.

[0055] The superabsorbent resin powder is preferably sodium polyacrylate resin powder. According to our company's tests, not all superabsorbent resin powders can achieve an optimal fire-extinguishing effect. There are obvious differences between various superabsorbent resin powders on water absorption mixing effect and state transition effect. The superabsorbent resin powder after water absorption is sprayed to the fire site, causing a different fire-extinguishing effect. The water absorption rate, water absorption ratio, viscosity, density and other indicators of the sodium polyacrylate resin powder are very suitable for the firefighting device and mixed method of the present application, and can achieve an excellent fire-extinguishing effect.

[0056] In addition, other types of fire-extinguishing agent powders may also be used, such as water-soluble powder fire-extinguishing agent, sodium alginate mentioned in some literatures, soluble calcium salts, etc., however, powder dissolving in water more quickly has a relatively good effect according to test results. In fact, the firefighting device of the present application can theoretically use almost all kinds of powder fire-extinguishing agents. However, in term of the mixing effect alone, the present application may not be superior to the prior art. For example, in the case of spraying hydrophobic dry powder fire-extinguishing agent, a much higher pressure is required when compared with the pressure at which the sodium polyacrylate powder is sprayed, so as to ensure a basic mixing effect. However, actually, the present application is not designed only to solve the problem of mixing effect. What kind of structure can minimize the influence of the water flow on the powder pipeline is a core of the present application. The mixed-jet structure used by many powder fire-extinguishing agents adopts the mode of internal powder and external water, which requires the powder and water to be pre-mixed in a special container or pipeline for fire trucks and then be sprayed. Some powder spray pipes are even directly inserted into the water spray pipes, which easily causes residual water to enter the powder pipeline, thereby causing pollution and blockage. By adopting the design of the present application, although the mode of external water and internal powder is still kept, the relative position of the powder spray port and the water spray port are effectively adjusted, and a mixed position of the water flow and the powder is optimized, which can solve the problem of the residual water flowing back into the pipeline, so that the subsequent cleaning work is relatively simple, the pollution and corrosion are small, and beneficial technical effects are also obtained.

[0057] The water nozzle 1 and the powder nozzle 2 are integrally disposed. The water nozzle 1 and the powder nozzle 2 generally refer to parts of the water spray device and the powder spray device close to the water spray port 3 and the powder spray port 4, respectively. Referring to FIGS. 6-9, in the integrated mode, the water nozzle 1 and the powder nozzle 2 are integrated into an independent structure, and only two independent spray pipelines are required to be divided. As shown in FIGS. 7-9, the specific shapes of the water spray pipe 3 and the powder spray pipe 4 may be relatively flexible, the open area may also be adjusted as required, and the shape of the sprayed water column may also be hollow or other suitable shapes. The whole system has a very simple structure, a small volume, and a beautiful appearance. The device cannot be damaged easily during training, transportation and firefighting.

[0058] Referring to FIGS. 7-9, the distance between the powder spray port 4 of the powder nozzle 2 and the water spray port 3 of the water nozzle 1 in the axial direction is greater than 3 cm. The powder spray port 4 is provided with a water blocking jacket 11. A drainage space 12 is provided between the water blocking jacket 11 and the pipe wall of the water nozzle 1. A drainage space 12 is provided between the pipe wall of the powder nozzle 2 and the pipe wall of the water nozzle 1. A front portion of the water nozzle 1 is provided with an outer sleeve 10.

[0059] Generally, the distance between the powder spray port 4 and the water spray port 3 will not be too long, for example, more than 15 cm. However, due to the low density and small particles of some fire-extinguishing agent powders, the dispersion effect thereof is strong under the action of high-pressure gas. When the distance A is longer, the water blocking jacket 11 may be arranged at the powder spray port 4 to seal part of the area outside the powder spray port 4, which is of great significance to avoid water splashing and backflow. In particular, the drainage space 12 is provided between the water blocking jacket 11 and the pipe wall of the water nozzle 1, or between the pipe wall of the powder nozzle 2 and the pipe wall of the water nozzle 1, which can effectively reduce the possibility of the water flowing into the surrounding of the powder spray port 4. Certainly, the arrangement mentioned here does not only refer to a composition of a specific solid structure, but also refer to a certain design on a water passage, so that the water column is sprayed in a certain shape or form, such as spraying against the outer pipe wall, then the water barrier space 12 is naturally formed between the spray nozzles to keep the spray ports away from each other. In addition, such design also considers the actual working process of the high-pressure water monitor. A use angle of the water monitor is generally obliquely upward. When a valve of the high-pressure water monitor is just opened, there is a process for the valve opening, and there is no residual water in the pipeline. Therefore, the high-pressure water column cannot be formed instantaneously at the beginning, but is gradually formed from a low-pressure water column to a high-pressure water column, and this process generally causes the water flow in the water monitor to flow directly under the water nozzle 1. In addition, when the high-pressure water monitor just finishes spraying, the valve is required to be closed gradually. During the process of closing the valve, the pressure and water volume in the pipeline gradually decrease, until the finally sprayed water column falls down directly due to insufficient pressure, which will cause this part of the water flow to drop directly to the inner side of the pipe wall of the water nozzle 1. If the water flow can flow directly along the pipe wall to the powder spray port 4, the powder spray port 4 will inevitably be blocked. We have designed the drainage space 12 here, and most of the water flow that falls down due to the insufficient pressure can flow into the drainage space 12 along the pipe wall, which basically solves the above problems. Since the actual amount of water flowing into the water nozzle 1 is not very large, and the powder spray port 4 may be blocked only due to the formation of the absorbent gel, the pipe opening will not be blocked, as long as the water is properly discharged or temporarily stored. Here, it is possible to flexibly choose the discharge mode for the water flow entering the water nozzle 1, for example, providing a drainage hole directly under the water nozzle 1.

[0060] The water nozzle 1 belongs to a part of the fire water monitor, fire hose or fire water gun and is connected to the water spray pipe 5, and can spray the high-pressure water flow or water mist. Referring to FIG. 5, it can be seen that the firefighting device of the present application can actually be obtained by transformation from most of existing mixed-spray firefighting devices. Regardless of the original water monitor or water gun, as long as the positional nesting relationship between the powder spray pipe and the powder nozzle is modified to a certain extent, the firefighting device of the present application may be obtained. This is also a major contribution of the present application. Instead of simply abandoning a large number of existing firefighting devices, according to the characteristics of the powder fire-extinguishing agent, the best pipeline configuration is selected in the existing firefighting devices. The powder spray port has been changed from being disposed roughly on the same plane as the water spray port to being disposed at a certain distance behind the water spray port, so that when the sodium polyacrylate resin powder is used as a fire-extinguishing agent, its maximum efficiency is exerted, and the cost of the whole system is minimized.

[0061] Referring to FIG. 5, the powder nozzle 2 is connected with a powder spray pipe 6, and the powder spray pipe 6 is connected with the powder storage tank 7, and the powder storage tank 7 is connected with the high-pressure gas source 8. This is also a configuration of the conventional powder spray device of the mixed-jet equipment. Certainly, the powder nozzle is directly connected to other types of powder supplying devices, which does not affect the effect of the present application. The core is that the fire-extinguishing agent sprayed by the powder spray device can be sprayed to the water column, and the water spray splashed at the water spray port 3 does not enter the powder spray port 4.

[0062] In addition, the present application further provides a mixed-spray method for a powder fire-extinguishing agent and water. The superabsorbent resin fire-extinguishing agent powder sprayed from the powder spray port 4 of the powder nozzle 2 are sprayed from the powder nozzle 2 in the middle, and is mixed with the water flow sprayed from the water spray port 3 surrounding the powder nozzle 2 in the air outside the water nozzle 1. The fire-extinguishing agent powder is sodium polyacrylate resin powder. The fire-extinguishing agent powder is sprayed from the rear of the position of the water spray port 3.

[0063] The application is beneficial in that: it solves the technical bottleneck of using sodium polyacrylate resin powder and the like as a fire-extinguishing agent in the prior art, so that the powder fire-extinguishing agent such as sodium polyacrylate resin powder can be smoothly and continuously sprayed into a fire field, without blocking the powder spray port or causing a pipeline pollution.

[0064] The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.