CN211752076U - Fire fighting device with powder spraying port extending outwards - Google Patents

Abstract

The utility model provides an overhanging fire control unit of mouth dusts, including water spout 1 and powder nozzle 2, water spout 1 encircles and sets up in powder nozzle 2's outside, and powder nozzle 4 of powder nozzle 2 sets up in the place ahead of 1 water spout 3 of water spout. The powder nozzle 2 comprises a detachable extension pipe 11 arranged at the front part. The utility model provides an use sodium polyacrylate resin powder as the technical bottleneck of fire extinguishing agent among the prior art, let in the injection fire scene that sodium polyacrylate resin powder can last smoothly, unblock the mouth of dusting.

Description

Fire fighting device with powder spraying port extending outwards

Technical Field

The utility model relates to a fire-fighting equipment technical field, concretely relates to overhanging fire control unit who is used for powder fire extinguishing agent and liquid of mouth dusts.

Background

At present, water is still the most common fire extinguishing agent and has the advantages of low price, easy obtaining, no environmental pollution and the like. However, because of good water fluidity, most of water is lost after being sprayed to a fire scene, which causes waste, and for large-scale fire disasters with large ignition area, rapid fire development, easy reburning and large difficulty in fighting fire, the fire fighting with water can only be controlled to spread, and the fire is difficult to extinguish effectively in time. Although the fire extinguishing effect of the dry powder fire extinguishing agent widely used at present is improved, the dry powder fire extinguishing agent has poor effect on certain types of big fire, and the residue pollutes the environment seriously.

Super Absorbent Resin (SAR) is a novel functional polymer material which contains strong hydrophilic groups such as carboxyl, amido and the like and has a water swelling type and three-dimensional network structure with a certain crosslinking degree. It is insoluble in water and organic solvent, and has unique performance of strong water absorption and water retention. Compared with the traditional water absorption materials such as sponge, cotton, cellulose and silica gel, the super absorbent resin has large water absorption capacity, can rapidly absorb liquid water which is dozens of times or even thousands of times of self weight, has strong water retention property, is not easy to lose water even under the heating and pressurizing condition, and simultaneously has some characteristics of high polymer materials. Due to these characteristics, the research and development of the super absorbent resin is very rapid, and the super absorbent resin has been widely applied to various fields such as agriculture, forestry, gardening, medical health, food industry, petrochemical industry, building materials and the like.

Superabsorbent polymers have been rapidly developed and diversified, and are classified into various methods mainly according to the source of raw materials, hydrophilization method, type of hydrophilic group, crosslinking method, and product form, and the most commonly used classification methods include starch-based superabsorbent polymers, cellulose-based superabsorbent polymers, synthetic superabsorbent polymers, protein-based superabsorbent polymers, blend and composite superabsorbent polymers, and the like.

Superabsorbent resins are capable of absorbing hundreds or even thousands of times their own mass of water because they have two conditions: one is that it has hydrophilic groups such as carboxyl group, hydroxyl group, amide group, sulfonic acid group, etc., making water absorption possible. And secondly, the water-absorbing material has a three-dimensional space network structure and is insoluble in water, so that the water absorption becomes a reality. The super absorbent resin is a three-dimensional network polymer which has hydrophilic groups and is slightly crosslinked, can absorb a large amount of water, swell and keep the water not to flow out, and has the advantages of high water absorption rate, strong water retention performance and the like.

The application of the high-water-absorption resin, in particular the high-molecular hydrogel of the polyacrylic acid high-water-absorption resin, in the field of fire extinguishment has the following advantages:

1. in the super absorbent resin, after side groups of the polyelectrolyte meet water, corresponding anion hydrophilic groups and cations (mobile ions) are ionized, and negative anions are arranged on a main chain network framework and cannot move, and the repulsion action between the negative anions and the cations generates the power for network expansion. Although the cations have certain mobility, the cations exist in the network due to the attraction and the constraint of opposite charges of the network framework, so that the concentration of the cations in the network is greater than that of the cations in external water, ions generate osmotic pressure inside and outside the network, and in addition, water can enter the three-dimensional network in a large amount in a short time due to the fact that the polyelectrolyte has groups with strong hydrophilic capacity. Under the condition of high temperature, the super absorbent resin fixed with a large amount of free water has quite large heat capacity, and can consume a large amount of heat when losing water, thereby forming effective insulation for a heat source and being beneficial to controlling fire behavior.

2. The super absorbent resin forms elastic gel after absorbing water, and the gel particles are tightly connected together without gaps for air to enter, so that the contact between a fire source and air can be isolated in a hydrogel state, the reignition of a blind fire can be prevented, objects in a fire scene covered by the gel can be protected, and the effect of quickly extinguishing the fire can be achieved.

3. The super absorbent resin forms gel after absorbing water, has excellent chemical stability, thermal stability and compatibility, has very high viscosity and very good adhesion capability, can cover the surface of an object without falling after being sprayed on a vertical surface to form enough adhesion thickness, and can effectively improve the fireproof effectiveness of unburnt objects in a fire scene.

4. The super absorbent resin is high polymer powder, is safe in storage, transportation and the like, has storage (airtight anti-water absorption) stability of more than two years, and is non-toxic; in strong fire, the resin is burnt into carbon dioxide and water after being heated and dehydrated, and is nontoxic to people and livestock; after the fire is extinguished, the residual resin in the fire scene can be naturally degraded within several months, so that the fire-extinguishing agent is non-toxic and pollution-free to people and environment, and is green and environment-friendly.

5. The super absorbent resin powder has light specific gravity and strong water absorption capacity, can absorb water more than 300 times of the self weight in a very short time, and the resin powder content in the whole water absorbent gel is generally between 0.05 and 0.5 percent of the weight of the water. Generally about 0.1 percent, a large amount of fire extinguishing gel can be formed only by little super absorbent resin powder, the fire extinguishing and preventing effect is excellent, the water can be continuously absorbed, the secondary damage caused by the flowing of the excessive water is avoided, and the water-saving effect is achieved.

6. The super absorbent resin powder is weakly acidic, weakly alkaline or neutral, and does not corrode fire fighting equipment.

In the prior art, a technology for preparing gel fire extinguishing by adopting an acrylic polymer exists, for example, Chinese patent CN107497088A discloses a hydrogel fire extinguishing agent and an implementation method thereof, wherein the hydrogel fire extinguishing agent is used by dissolving the hydrogel fire extinguishing agent in water, stirring for no more than 1 minute to prepare a solution with the mass concentration of 3-5 per mill, and the solution can be used for fire extinguishing; CN107789085A discloses a novel polymer gel water-based extinguishing agent, wherein when in use, the novel environment-friendly polymer gel water-based extinguishing agent is added into water with the mass of 600-1000 times, and polymer gel can be formed after stirring for 3-5 minutes and used for extinguishing fire; CN207101696U discloses a novel environment-friendly fire fighting truck, which comprises the steps of firstly putting materials into a high polymer fire extinguishing material storage tank, enabling the fire extinguishing materials to enter a fire monitor pipeline, enabling water to come out of the water tank and enter the fire monitor pipeline through a water inlet of a fire pump, enabling the water and the high polymer materials to be fully mixed in a spiral pipeline under the action of a rotary mixing device, and then sending out the water from a fire monitor; CN100444912C discloses the application of a super absorbent resin water-absorbing gel fire extinguishing agent, which is to mix synthetic resin sodium polyacrylate with 1000 times of water to generate water-absorbing gel in half an hour, the gel can be sprayed to fire by a water gun, fine powder of sodium polyacrylate is mixed with 1000 times of water and sprayed to the fire part from a spray gun, and the gel is generated to play a fire extinguishing role in 15-60 seconds.

However, these high water-absorbent resin fire extinguishing agents have significant drawbacks in their use. After long-term tests of the inventor, the super absorbent resin powder rapidly swells after absorbing water, and the viscosity becomes higher and higher along with the increase of the water absorption amount until the super absorbent resin finally approaches to a solidification state, the stirred resin is very viscous and is easy to solidify, and it is difficult to find a proper way for emitting the gel-like water absorbent resin approaching to a solid state, namely spraying the gel-like water absorbent resin instead of throwing the gel-like water absorbent resin together by using manpower or machines. Further, the resin may severely block the piping of the fire fighting equipment during expansion, resulting in non-sustained spray and even equipment damage due to poor water flow and closed piping. Therefore, the application of the above fire extinguishing system is greatly limited.

Furthermore, in prior art fire fighting equipment, separate input lines plus overlapping output lines are typically used for mixing the powdered extinguishing agent with the water stream. For example, chinese patent CN201591928U discloses a pipe-in-pipe type composite jet fire monitor, which is shown in fig. 1, and adopts separate input of various fire extinguishing agents, and different fire extinguishing agents are respectively conveyed through an inner pipe and an outer pipe, so that the mixed liquid and the superfine dry powder are not mixed with each other during the conveying process, and only join at the nozzle, thereby completely retaining their respective characteristics, and in addition, the wall attachment effect of the direct-flow pressure water or the foam mixed liquid enables the superfine dry powder with good hydrophobicity to be carried to a longer distance. Chinese patent CN207722267U discloses a fire fighting gun capable of adjusting the mixing ratio of water and superfine dry powder fire extinguishing agent, referring to fig. 2, the front end of the gun body 8 is provided with a spray nozzle, the rear end of the gun body 8 is provided with an independent powder inlet pipe and a water inlet pipe, the front part of the powder inlet pipe is sleeved inside the front part of the water inlet pipe, a water through cavity is left between the front part of the powder inlet pipe and the front part of the water inlet pipe, and the front end of the powder inlet pipe and the front end of the water inlet pipe are both connected with the.

For example, chinese patent CN 105148435 a discloses a multifunctional fire-fighting coaxial nozzle device, which is shown in fig. 3 and includes an outer pipeline inlet port connected to deliver an outer pipeline fire-extinguishing medium, an inner pipeline inlet port connected to deliver an inner pipeline fire-extinguishing medium, an outer pipeline valve, an inner pipeline valve, an outer pipeline, an inner pipeline, an outer pipeline nozzle, an inner pipeline nozzle, and an inner pipeline and an outer pipeline connected together. Two sets of independent fire extinguishing nozzle devices are combined into a whole skillfully, and two fire extinguishing media with the same or different properties or the same property and different functions can be sprayed to a fire scene simultaneously. For another example, chinese patent CN 109806532 a discloses a compound jet fire-extinguishing spraying device, which includes a first connecting pipe for delivering foam or water-based fire-extinguishing agent, and a first discharging port at one end; the second connecting pipe is used for conveying dry powder driven by nitrogen, one end of the second connecting pipe is provided with a second discharge port, and the second discharge port and the first discharge port are arranged concentrically; one end of the outer spray pipe is connected with the first discharge port; interior spray tube is located the inboard of outer spray tube, and with the coaxial setting of outer spray tube, the one end of interior spray tube penetrates first connecting pipe for carry the dry powder under the nitrogen gas drive, the outer wall of interior spray tube with be equipped with the passageway that is used for carrying foam or river system fire extinguishing agent between the inner wall of first discharge gate.

The fire water monitor or the water gun is designed aiming at the traditional powder fire extinguishing agent, particularly the powder fire extinguishing agent which is usually insoluble in water and non-absorbent, and other fire extinguishing agents on the market can not expand in volume and increase in viscosity caused by water absorption, so that the fire water monitor has no problem when the powder fire extinguishing agent is used, and all fire extinguishing agent powder can be carried away from the fire water monitor along with the powerful washing of water flow. However, when the super absorbent resin is used as a fire extinguishing agent, a serious problem occurs, and the super absorbent resin is not soluble in water nor hydrophobic in nature, but can rapidly absorb water molecules into a high molecular structure and fix the water molecules, and forms gel with strong adsorption force, so that as water spraying and powder spraying are carried out simultaneously, all resin powder cannot be taken away by strong water flow, so that more and more water absorbent resin is adhered to the vicinity of a powder spraying port, the powder spraying port is completely blocked after the super absorbent resin works for a period of time, and the problem becomes more serious as various performance indexes of the super absorbent resin are more excellent. In the tests made by our company, the peripheral water flow will flow into or sputter or drip to the vicinity of the inner layer powder spraying port in various ways, and because of the high viscosity and the rapid solidification, the resin after water absorption will gradually accumulate at the nozzle part to form a volcano-like resin pile, gradually compress the powder spraying channel, and finally completely seal the powder outlet. In the most serious case, the water flow may directly flow to the powder spraying port, and the solidified resin can directly block the pipeline inside the powder spraying port in a very short time. Therefore, it is necessary to modify the existing mixing jet device to suit the resin powder fire extinguishing agent.

In addition, when the fire extinguishing agent is other types of powder (such as water-soluble powder), the situation that water flows back into the powder spraying nozzle can also occur, particularly in the starting stage and the water closing stage after the fire extinguishing is finished. Of course, the powder extinguishing agent used in fire fighting is usually a substance with excellent solubility, and once it is in contact with water, it will be dissolved in a large amount, and the consequences are also very serious, firstly, it will easily produce undesirable toxic substances or chemicals that corrode fire fighting equipment, and secondly, the dissolving process may be severe, and it will be easy for undesirable strong reaction or large amount of heat to be generated.

In view of the above, there is a need in the market for a fire-fighting device capable of using a super absorbent resin powder as a fire extinguishing agent, capable of rapidly mixing the resin powder with water flow without forming gel or paste to block a powder spraying port, and capable of continuously and stably delivering the mixed gel or solution to a designated location.

Disclosure of Invention

The utility model aims to solve the technical problem that a fire control unit is provided can realize the flash mixed of fire extinguishing agent powder especially super absorbent resin powder and rivers to do not form gel or paste and block up the mouth of dusting, can spout powder fire extinguishing agent continuously and stably.

The technical scheme of the utility model is, provide an overhanging fire control unit of mouth dusts, including water spout 1 and powder nozzle 2, water spout 1 encircles and sets up in powder nozzle 2's outside, and powder nozzle 2's mouth of dusting 4 sets up in the place ahead of 1 water spout 3 of water spout. The powder nozzle 2 comprises a detachable extension pipe 11 arranged at the front part.

The fire extinguishing agent powder sprayed from the powder spraying nozzle 2 is mixed with the water flow sprayed from the water spraying nozzle 1 in the air outside the fire fighting device. The fire extinguishing agent powder is sodium polyacrylate resin powder.

The distance A between the powder spraying opening 4 of the powder spraying nozzle 2 and the water spraying opening 3 of the water spraying nozzle 1 in the axial direction is not more than 15 cm.

The water spray nozzle 1 has a separate spray duct 9 with respect to the powder spray nozzle 2.

A water-proof space 12 is arranged between the pipe walls of the water nozzle 1 and the powder nozzle 2.

The water spray nozzle 1 also comprises an outer sleeve 10 arranged at the front part, and a powder spraying port 4 of the powder spraying nozzle 2 is arranged in front of the pipe orifice of the outer sleeve 10.

The water spray nozzle 1 is connected with the water spray pipe 5 and can spray high-pressure water flow or water mist, the powder spray nozzle 2 is connected with the powder spray pipe 6, 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 air source 8.

The water column sprayed out from the water nozzle 1 is sprayed out in a hollow state and gathered at a certain distance in front of the fire fighting device.

Compare with the mixed efflux fire-fighting equipment that exists in a large number among the prior art, the utility model discloses an advantage embodies:

1. the mixed jet water cannon squirt among the prior art adopts the scheme that the spray pipe cup joints the pipe that dusts usually, can let powder and water mix together better to utilize the strength of rivers to carry more far with the powder. The premise of the design idea is that the fire extinguishing agent can be completely taken away by water flow after being sprayed out, and a large amount of gel or pasty substances can not be generated even if the powder spraying port meets water. However, when the super absorbent resin powder is used as a fire extinguishing agent, the powder spraying port and the water spraying port are close to each other, so that water flow in the outer layer has too much chance to enter the powder spraying port in the inner layer, and gel with very high viscosity is formed, thereby causing blockage. However, the design of the external water powder and the internal powder has the advantages of the design. For example, a powdered fire extinguishing agent is generally lighter, the airflow environment of a fire scene is complicated, the powder is blown out by compressed air, the dispersion area is larger, the powder is sprayed out from the middle of a water column, all the powder directly collides against a water wall, and the powder is very little leaked and is fully mixed. After long-time experimental research, the company discovers that a large amount of water mist or water drops can be stirred with the pipe wall on the side of the water spraying port under the condition that the surrounding pressure is reduced because water flow is sprayed out from the closed pipeline forcefully; a plurality of water drops can jump out of the water column directly, which is the result of changes of indexes such as water flow pressure intensity, momentum and the like; in practice, the defects generated in the manufacturing process of the water cannon, such as insufficient concentricity, uneven thickness, narrow and wide annular gap and the like, are found to influence the splash sputtering degree. If these water molecules are splashed to the powder spraying port located immediately beside, the powder spraying port of the super absorbent resin powder is clogged. In order to exert the advantages of the design of the external water and the internal powder and reduce the defects as much as possible, the position of the powder spraying nozzle is creatively changed from being coplanar or approximately coplanar with the water spraying nozzle to the position of the powder spraying nozzle which is arranged at a distance in front of the water spraying nozzle or the nozzle of the whole fire fighting device. Under the scheme, a structure that the powder spraying position extends outwards from the water spraying opening for a certain distance is formed, and the distance between the powder spraying position and the water spraying opening is increased as much as possible. By adopting the design of the preposed powder spraying port, on one hand, water drops splashed by the water spraying port sprayed by water flow basically have no chance to enter the area near the powder spraying port, on the other hand, the periphery of the powder spraying port is not blocked by the pipe wall of the water spraying nozzle and is in a suspended state, even if powder is scattered around due to the spraying of pressure gas, the powder cannot be attached and accumulated at the powder spraying port but directly enters a water column, and the possibility that the powder spraying port is stained with water is reduced to the maximum extent. We have found that even if spray splashes on the powder spraying port, resin powder does not accumulate just in front of the powder spraying port but only laterally behind the powder spraying port because the powder spraying pipe extends to the outside, and the powder spraying port is not blocked in a short time. Experiments prove that the fire fighting device with the nozzle structure can continuously work for tens of minutes without blockage.

2. The utility model solves the biggest technical problem that how to lead the powder spraying port and the water spraying pipe not to be plugged by gel or paste, and the spraying pipe is not polluted. However, in practice, because water cannons are mostly operated manually, the spraying direction of water flow, the water quantity and the sprayed water pressure are likely to fluctuate greatly, certain water-absorbed gelatinous substances are inevitably accumulated at the powder spraying port, and once the substances are accumulated to a certain degree, the areas of the powder spraying port and the water spraying port are reduced, so that the use efficiency of fire fighting equipment is greatly reduced. Therefore, a convenient and quick method is found, namely the front end part of the water spray nozzle is designed into a detachable extension pipe, and once the powder spraying port is blocked due to any reason in the using process, the extension pipe is replaced immediately, so that the aim of quickly putting into operation again is fulfilled. The method can solve the blockage problem most quickly because the blockage of the powder spraying port accounts for more than 90 percent of all blockage according to experiments, and the blockage of the water spraying port is generally due to chain reaction caused by the blockage of the powder spraying port; meanwhile, the blockage of the powder spraying port can not block a long-distance pipeline even if the pipeline of the powder spraying nozzle is blocked, and the pipeline can be quickly sealed due to the strong water absorption capacity and the sealing capacity of the sodium polyacrylate. Therefore, as long as the length of the extension pipe is properly designed, the main pipe can be prevented from being closed by the resin powder. In addition, when other fire extinguishing agents are used, the pollution caused by backflow of water flow from the powder spraying port can be solved by cleaning the extension pipe, otherwise, the problem of fire extinguishing agent solution pollution near the powder spraying port is solved by integrally cleaning the powder spraying pipeline, and the cost is high, and the time is long.

3. The fire extinguishing gel has the advantages that the using mode of using super absorbent resin as a fire extinguishing agent in the fire fighting field is changed, the super absorbent resin is used after being pre-mixed in the prior art, the spraying and using mode is changed, the fire extinguishing efficiency is greatly improved, additional stirring equipment is not needed, the traditional water column fire extinguishing mode is not changed, only a group of powder spraying devices are added in the middle of a water cannon, a new fire extinguishing mode for spraying powder on a water spraying column is formed, the water column carries the powder away, the water and the powder are mixed and absorbed while walking away, the full water absorption and mixing are completed within a few seconds when the ignition point is reached, when the water flow reaches the ignition point, the fire extinguishing gel is just formed, and the quick response of the fire extinguishing in the prior. The resin powder and the water flow are mixed in the air at a certain distance from the nozzle instead of being mixed in the nozzle or the outlet, so that the opportunity that the water flow enters the area near the powder spraying port is greatly reduced. The shape of the water column is clearly distinguished from the shape of a water column sprayed from a conventional water pipe, since the water stream is strongly sprayed from the periphery of the annular pipe, and approximately represents a hollow annular water column, and such water columns are gathered at a position at a distance from the water spray outlet, and of course, are usually sprayed straight forward after being gathered again and separated slightly. This provides a basis for the extended design of the spray pipe, at least the water flow does not spray directly on the spray opening. The physical properties of the super absorbent resin, especially the sodium polyacrylate resin, are utilized to the maximum extent, so that the high water absorption capacity and the high water absorption rate are not barriers to using the sodium polyacrylate as the fire extinguishing agent any more, but become an advantage. The resin powder and the water flow are directly mixed in the air without being mixed in any closed or semi-closed space, and the influence of high viscosity generated after water absorption on the spraying of the fire extinguishing agent can be solved to a great extent.

4. A water-proof space is reserved between the water spray nozzle and the powder spray nozzle, so that the water column is guaranteed not to be sprayed out by clinging to the outer wall of the powder spray pipe, namely the water spray nozzle and the powder spray pipe are separated by a certain distance B in the radial direction, and the influence of spray splashed by the water spray nozzle on the powder spray nozzle can be reduced to the maximum extent by adding the distance A separated in the axial direction. Meanwhile, due to the existence of the waterproof space, the diameter of the water spray opening is actually increased, so that the convergence point of the sprayed hollow water column in the air is farther away from the powder spray opening, and the resin powder can enter the water column. The strong water flow or the water mist sprayed by the water spraying pipe can convey the gel formed by the resin to a far place, and the water flow can be gathered together at a certain distance in front of the water spraying opening when being sprayed out rapidly, so that the probability of the powder escaping from the water column can be reduced to almost zero; meanwhile, a certain negative pressure can be generated in the water column, and the resin powder which floats along with the airflow after being sprayed out can be sucked into the water flow, so that the characteristic of low density and small particles of the resin powder is well utilized.

5. The utility model discloses the structure that powder nozzle and water spray nozzle overlapped, and current double-phase efflux mixing arrangement do not have the material difference, preparation simple process, simple structure, the appearance is small and exquisite pleasing to the eye, and occupation space is little, installation and maintenance or replacement part convenient and fast. To the producer, under the condition of pursuing cost balance, need not to make substantive change to current fire water monitor, squirt or water dragon, want to reach the technical effect of the utility model, can utilize original water spray nozzle and powder spray nozzle, only need to the powder spray nozzle pipe wall suitably outwards extend can, greatly reduced the transformation cost.

Drawings

FIG. 1 is a schematic diagram of a prior art multiphase jet water cannon;

FIG. 2 is a schematic diagram of a multiphase jet water gun according to the prior art;

FIG. 3 is a schematic view of a prior art multiphase jet water cannon;

FIG. 4 is a schematic view of a prior art multiphase jet water cannon;

FIG. 5 is a schematic structural view of an embodiment of the fire fighting device of the present invention;

FIG. 6 is a schematic view of the position of the nozzle on the end face of the embodiment of the fire fighting device;

FIG. 7 is a schematic view of a nozzle of an embodiment of the fire fighting device of the present invention;

FIG. 8 is a schematic view of a nozzle of an embodiment of the fire fighting device of the present invention;

FIG. 9 is a schematic view of a nozzle of an embodiment of the fire fighting device of the present invention;

fig. 10 is a schematic view of a nozzle structure of an embodiment of the fire fighting device of the present invention.

Detailed Description

The following embodiments of the present invention will be described in detail, and the following embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.

Referring to fig. 5, the utility model relates to a fire-fighting equipment technical field discloses an overhanging fire control unit of powder nozzle is provided, including water spout 1 and powder nozzle 2, water spout 1 encircles and sets up in the outside of powder nozzle 2, and powder nozzle 4 of powder nozzle 2 sets up in the place ahead of water spout 1 water spout 3.

Generally speaking, mixed-jet fire-fighting devices all comprise several components, such as water pumps, high-pressure pumps, pipes, valves, water connections, control devices, etc., but in particular the utility model discloses a part that only includes two cores, the device that dusts and the device that sprays water. The purpose of the invention can be achieved as long as the two devices are properly arranged. Tests of our company for some time before were mainly carried out around the reuse of mixed jet devices in the prior art, because mixed jet devices for fire extinguishing by spraying powder and high-pressure water columns together exist in the prior art, the development cost is saved, and if the mixed jet devices can be directly reused, the test cost is very low. However, after a series of tests, and several varieties of super absorbent resin are replaced midway, the excellent spraying effect cannot be achieved. The existing three-phase or two-phase mixed jet fire-fighting equipment is characterized in that a water spraying port and a powder spraying port are mutually nested, water spraying and powder spraying are carried out simultaneously, water and powder are mutually wrapped and sprayed, the sprayed water splash is very easy to enter the periphery of the powder spraying port due to the fact that the pressure of a high-pressure water column is very high, collision between water lines is very violent, and compared with the existing powder fire extinguishing agent, super absorbent resin powder is not soluble in water and not hydrophobic, but rapidly expands after meeting water, viscosity is rapidly increased to form gel, the gel gradually becomes solid state to seal the peripheral inner wall of the powder spraying port, and finally the powder spraying port can be thoroughly sealed, so that the resin serving as the fire extinguishing agent cannot be sprayed. 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 spraying port, and gel is formed at the powder spraying port to directly seal the powder spraying port.

In order to solve the problem, the technical scheme that the position of the powder spraying nozzle is changed from being coplanar or substantially coplanar with the water spraying nozzle to being close to the position of the powder spraying nozzle is creatively provided, so that the powder spraying nozzle 4 presents a protruding suspended state. It should be emphasized that the powder spraying opening 4 of the powder spraying nozzle 2 and the water spraying opening 3 of the water spraying nozzle 1 refer to the positions where the powder and the liquid are separated from the closed pipeline and contacted with the outside air when being sprayed. However, in the case where the outer sleeve 10 is provided, the water jet 3 is not a nozzle of the entire apparatus.

In one embodiment, the water nozzle 1 and the powder nozzle 2 are provided with a separate pipe at least at the front part, so that the water flow can be prevented from being directly sprayed out along the outer pipe wall of the powder nozzle 2, and water splash around the powder nozzle 4 can be avoided. According to the experimental conclusion, when the water enters the open space from the closed pipeline, the water column sprayed at high speed generates the maximum splash of water due to the change of pressure; meanwhile, the generation of collision splash at the position with changed structural and shape characteristics is also obvious. The utility model discloses under the scheme, formed the structure that rivers blowout position and powder blowout position separated a certain distance in essence. The overlapped nozzles are relatively close to each other in end face view, but the distance A in the axial direction is effectively lengthened, and the powder spraying port 4 has a certain axial and radial buffer distance from the water spraying port 2 which sprays most water. Under the design, the fire extinguishing agent powder, particularly the sodium polyacrylate resin powder, can be directly sprayed onto surrounding high-pressure water columns from the middle at a high speed under the action of pressure gas due to low density and small particles, can be rapidly added into water flow due to the excellent water absorption rate of the sodium polyacrylate resin powder, flies to an ignition point along with the water flow, and cannot be scattered and adhered to the pipe wall in a large amount under the strong negative pressure traction of the high-pressure water columns.

Referring to fig. 7, 8 and 9, the position of the powder injection port 4 is a certain distance in front of the position of the water injection port 3 or the outer sleeve 10. The distance A between the powder spraying opening 4 of the powder spraying nozzle 2 and the water spraying opening 3 of the water spraying nozzle 1 in the axial direction is not more than 15 cm. Because the shape of the water column is changed only within a certain range, the water column is converged at a place 20 cm away from the front of the whole device, and the powder spraying port 4 cannot extend too much and cannot exceed the convergence point of the water column. Of course, the distance cannot be too short, which affects the water bloom evading effect. The super absorbent resin powder is sprayed into the water flow from the front of the water outlet 3 of the water nozzle 1. The design can effectively prolong the distance between the powder spraying port 4 and the water spraying port 3, and the powder spraying port which is easy to block is placed in the air outside the periphery without barriers, so that water drops are unlikely to splash to the place, and the problem of blocking of the powder spraying port 4 is basically avoided. The design can be realized by mainly considering that the powder is sprayed to have certain pressure, so that the powder can be ensured not to generate large-scale dispersion in a short distance, secondly, the resin powder with lighter density can be well attracted under the action of strong negative pressure of a high-pressure water column, and thirdly, the powder dispersion and water sticking can be relieved by adopting a mode of additionally arranging the extension pipe 11 under the condition of need. Therefore, the advantages of the sodium polyacrylate resin powder can be fully utilized and exerted, and the defect that the outlet is easy to block or the backflow is avoided.

The powder nozzle 2 comprises a detachable extension pipe 11 arranged at the front part. In the actual fire extinguishing process, various uncontrollable factors are too many, then too many accidents happen, a certain amount of water-absorbing gelatinous substances are inevitably accumulated at the powder spraying port, and once the substances are accumulated to a certain degree, the areas of the powder spraying port and the water spraying port can be reduced, so that the use efficiency of fire-fighting equipment is greatly reduced. Especially, when there is no water-stop space 12 between the water nozzle and the powder nozzle, as shown in fig. 10, the water flow is more likely to enter the powder nozzle 4 to cause clogging. A convenient and quick method is found, the front end part of the water spray nozzle is designed into a detachable extension pipe, once the powder spraying port is blocked due to any reason in the using process, the extension pipe is immediately replaced, and the fire fighting device can be put into operation again immediately. If only from the angle that two kinds of materials mix, the utility model discloses a fire control unit mixes the effect and is not necessarily superior to current bushing type and mixes fluidic system, but the utility model provides an use new problem that new fire extinguishing agent powder brought, produced fine technological effect when using super absorbent resin powder especially sodium polyacrylate resin powder as fire extinguishing agent, full play sodium polyacrylate resin powder's characteristic, even piling up the phenomenon has taken place, also clear up very easily, because extension pipe 11 exposes outside whole water jet 1, can directly use the instrument to detach the deposit from the pipeline outer wall. In addition, when using other fire extinguishing agents, because rivers refluence can cause the pipeline of dusting near the mouth of dusting to pollute, also can solve through changing the extension pipe, the extension pipe can also install again on the powder nozzle after the washing.

The fire extinguishing agent powder sprayed from the powder spraying nozzle 2 is mixed with the water flow sprayed from the water spraying nozzle 1 in the air outside the fire fighting device. Theoretically, the direction of the powder sprayed from the powder spraying port 4 and the direction of the water sprayed from the water spraying port 3 should intersect. The utility model discloses a under the design, although water spout 1 does not have the leanin, but because the diameter ratio water spout 1 of most water cannon inlet tubes is little, there is the process of outside high-speed diffusion at the blowout in-process, like this, when the horizontal blowout, the refraction that high-pressure rivers spun direction received the pipe wall can assemble to water spout 1's the central axis a little, just so can intersect with the slope of straight line spun powder from the centre, is favorable to further mixing of solid-liquid. This is even more evident in the case where the outer sleeve 10 is provided. The water jet nozzle 1 has various internal configurations, but the direction in which the water flow is finally ejected is inclined with respect to the powder ejection direction. In the experiment, the high-pressure water column is gathered at a certain distance from the pipe orifice, and the resin powder sprayed from the powder spraying port 4 can be sprayed onto the high-pressure water column from the middle hollow part, so that the floating powder can be intercepted onto the liquid level of the water column by means of a water curtain generated by the high-pressure water column to the maximum extent. In some cases, the shapes of the water spray nozzle 1 and the powder spray nozzle 2 may not be very regular, but the water flow and the powder spray along the designed direction are not influenced, and the complete symmetry of the shapes of the spray channels formed inside the water spray nozzle 1 and the powder spray nozzle 2 can be ensured as much as possible. The water spray nozzle 1 and the powder spray nozzle 2 respectively spray water flow and powder outwards independently, and then collide and mix at a certain distance from the pipe orifice, so that the problem that the powder spray orifice 4 is sealed by gel is solved well.

The super absorbent resin powder is preferably sodium polyacrylate resin powder tested by our company. Because not all the super absorbent resin powders can achieve the optimal spraying effect, the effects of water absorption mixing and state transition among various super absorbent resin powders are obviously different, and the fire extinguishing effect is different when the super absorbent resin powders after absorbing water are sprayed to an ignition point. The indexes such as the water absorption rate, the water absorption multiple, the viscosity and the density of the sodium polyacrylate resin powder are matched with the fire fighting device and the mixing method, and the excellent fire extinguishing effect can be achieved.

In addition, other types of fire extinguishing agent powder can be selected, such as water-soluble fire extinguishing agent powder, sodium alginate, soluble calcium salt and the like are mentioned in the literature, but according to test results, the mixing effect of the powder with high water-soluble speed is relatively good. In fact, the utility model discloses a fire control unit can adopt all kinds of powder fire extinguishing agent almost in theory, however, if the mixed effect of single theory, the utility model discloses be not necessarily superior to prior art. However, the utility model discloses it is not only designed for solving mixed effect problem, what kind of structure can fall to the influence of rivers to the powder pipeline just the utility model discloses a core. The mixed jet structure adopted when a plurality of powder extinguishing agents are used is a mode of internal powder and external water, some powder extinguishing agents need to be premixed in a special container or pipeline of a fire engine and then sprayed out, and some powder spraying pipes are even directly inserted into a water spraying pipe, so that residual water is easily caused to enter a powder pipeline, and further pollution and blockage are caused. Adopt the utility model discloses a design, though still outer water inner powder, the relative position of mouth and the water jet of dusting has obtained optimization adjustment, and the mixing position of rivers and powder has obtained the optimization, can solve the problem that residual water refluxes into the pipeline, and its follow-up cleaning work can be simple relatively, pollutes and corrodes for a short time, has obtained profitable technological effect equally.

Referring to fig. 6-9, the distance a between the powder spray opening 4 of the powder spray nozzle 2 and the water spray opening 3 of the water spray nozzle 1 in the axial direction is not more than 15 cm. The water spray nozzle 1 has a separate spray duct 9 with respect to the powder spray nozzle 2. A water-proof space 12 is arranged between the pipe walls of the water nozzle 1 and the powder nozzle 2. The water spray nozzle 1 also comprises an outer sleeve 10 arranged at the front part, and a powder spraying port 4 of the powder spraying nozzle 2 is arranged in front of the pipe orifice of the outer sleeve 10.

The water spray nozzle 1 and the powder spray nozzle 2 are integrally arranged, the water spray nozzle 1 and the powder spray nozzle 2 generally refer to the parts of the water spray device and the powder spray device close to the water spray opening 3 and the powder spray opening 4, and referring to fig. 6-9, the water spray nozzle 1 and the powder spray nozzle 2 are integrated on an independent structure, and only two independent spraying pipelines need to be cut. The specific shapes of the water spraying pipe 3 and the powder spraying pipe 4 can be flexible, the open area can be adjusted according to the requirement, and the shape of the sprayed water column can be a hollow water column or other suitable shapes. The whole system has the advantages of simple structure, small size and beautiful appearance, and the equipment is not easy to damage in the training, carrying and fire extinguishing use processes.

Usually, the distance between the powder spraying opening 4 and the water spraying opening 3 is not too long, for example, more than 15 cm. However, because some fire extinguishing agents have low powder density and small particles, and have strong dispersion effect under the action of high-pressure gas, when the distance A is longer, the extension pipe 11 can be arranged at the powder spraying port 4 to seal partial area outside the powder spraying port 4, which has great significance for avoiding water sputtering and backflow. Particularly, a water-isolating space 12 is arranged between the extension pipe 11 and the pipe wall of the water spray nozzle 1 or between the powder spray nozzle 2 and the pipe wall of the water spray nozzle 1, so that the possibility that water flows into the periphery of the powder spray opening 4 can be effectively reduced. Of course, the arrangement described herein does not merely mean that the water channel is formed of a specific solid structure, but may be designed to allow the water column to be ejected in a certain shape or form, for example, against the outer pipe wall, thereby naturally forming a water-proof space 12 between the nozzles and allowing the nozzles to be far away from each other. In addition, the actual working process of the high-pressure water cannon is also considered in the water-resisting space, the using angle of the water cannon is generally in the oblique upward direction, when the high-pressure water cannon just opens the valve, the valve is opened in one process, no residual water exists in the pipeline, so that the high-pressure water column cannot be formed instantly at first, the water column needs to be weak to strong, and the process can generally cause the water flow in the water cannon to directly flow to the position below the water nozzle 1. In addition, when the high-pressure water cannon just finishes jetting, the valve needs to be closed gradually, and in the process of closing the valve, the pressure and the water quantity in the pipeline are reduced gradually until the water column sprayed out finally directly drops down due to insufficient pressure, so that the part of water flow directly drops to the inner side of the pipe wall of the water nozzle 1. If the water flow can directly flow to the powder spraying port 4 along the tube wall, the powder spraying port 4 is inevitably blocked. However, we have designed the water-proof space 12 here, and most of the water falling due to insufficient pressure can flow into the water-proof space 12 along the pipe wall, so the above problems can be basically solved. Because the amount of water actually flowing into the water spray nozzle 1 is not large and only water-absorbing gel is formed to block the powder spray opening 4, the situation of blocking the nozzle can not occur as long as water is drained or temporarily stored. Here, the discharge of the water flow into the water nozzle 1 can be selected flexibly, for example, by providing a drain hole directly below the water nozzle 1.

The water spray nozzle 1 belongs to a part of a fire monitor, a fire hose or a fire monitor, is connected with a water spray pipe 5, and can spray high-pressure water flow or water mist. Referring to fig. 5, it can be seen that the utility model discloses a fire fighting unit can actually follow the transformation of the present mixed efflux fire fighting unit of the overwhelming majority and come, no matter what water cannon or squirt originally were, as long as carry out certain transformation to the nested relation in position of dusting pipe and dusting nozzle, just can obtain the fire fighting unit of this patent. This is also a big contribution of the utility model, give up a large amount of existing fire control units simply not, but to the characteristics of powder fire extinguishing agent, selected the best pipeline configuration mode among the existing fire control unit, will spray powder the mouth from roughly setting up near the water jet coplanar, change into setting up in water jet the place ahead certain distance department for under the condition that uses sodium polyacrylate resin powder as fire extinguishing agent, exert its maximum efficiency, and furthest has reduced the cost of entire system.

Referring to fig. 5, the powder nozzle 2 is connected with a powder spraying pipe 6, the powder spraying pipe 6 is connected with a powder storage tank 7, and the powder storage tank 7 is connected with a high-pressure gas source 8. This is also the configuration of mixing the conventional powder spray device of fluidic equipment, and of course, directly be connected with other types of confession powder device, also do not influence the effect of the utility model discloses. The core is also that the fire extinguishing agent sprayed by the powder spraying device can be sprayed to the water column, and meanwhile, water splashed by the water spraying opening 3 does not enter the powder spraying opening 4. The water column sprayed out from the water nozzle 1 is sprayed out in a hollow state and gathered at a certain distance in front of the fire fighting device.

The embodiment has the advantages that: the technical bottleneck that sodium polyacrylate resin powder and the like are used as fire extinguishing agents in the prior art is solved, the powder extinguishing agents such as sodium polyacrylate resin and the like can be smoothly and continuously sprayed into a fire field, and a powder spraying port is not blocked or a pipeline is not polluted.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The fire fighting device with the overhanging powder spraying port comprises a water spraying nozzle (1) and a powder spraying nozzle (2), and is characterized in that the water spraying nozzle (1) is arranged outside the powder spraying nozzle (2) in a surrounding manner, and the powder spraying port (4) of the powder spraying nozzle (2) is arranged in front of the water spraying port (3) of the water spraying nozzle (1).

2. A fire fighting unit as defined in claim 1, characterized in that the powder nozzle (2) comprises a detachable extension pipe (11) arranged at the front.

3. A fire fighting unit as defined in claim 1, characterized in that the extinguishing agent powder sprayed in the powder nozzle (2) is mixed with the water flow sprayed in the water nozzle (1) in the air outside the unit.

4. A fire fighting device as defined in claim 3, wherein said fire extinguishing agent powder is sodium polyacrylate resin powder.

5. A fire fighting unit as defined in claim 1, characterized in that the distance a in the axial direction between the powder nozzle (4) of the powder nozzle (2) and the water outlet (3) of the water nozzle (1) is not more than 15 cm.

6. A fire fighting unit as defined in claim 1, characterized in that the water spray nozzle (1) has a separate injection duct (9) with respect to the powder spray nozzle (2).

7. A fire fighting unit as defined in claim 1, characterized in that a water-tight space (12) is provided between the walls of the water nozzle (1) and the powder nozzle (2).

8. A fire fighting unit as defined in claim 1, characterized in that the water spray nozzle (1) further comprises an outer sleeve (10) arranged at the front, and the powder nozzle (4) of the powder spray nozzle (2) is arranged in front of the orifice of the outer sleeve (10).

9. A fire fighting unit as defined in claim 1, characterized in that the water nozzle (1) is connected to a water spray pipe (5) for spraying a high pressure water stream or mist, that the powder nozzle (2) is connected to a powder spray pipe (6), that the powder spray pipe (6) is connected to a powder storage tank (7), and that the powder storage tank (7) is connected to a high pressure air source (8).

10. A fire fighting unit as defined in claim 1, characterized in that the water jet from the nozzle (1) is hollow and converges at a distance in front of the unit.

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