CN112933479B - Intelligent large-flow compressed air foam injection fire fighting truck - Google Patents
Intelligent large-flow compressed air foam injection fire fighting truck Download PDFInfo
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- CN112933479B CN112933479B CN202110242163.0A CN202110242163A CN112933479B CN 112933479 B CN112933479 B CN 112933479B CN 202110242163 A CN202110242163 A CN 202110242163A CN 112933479 B CN112933479 B CN 112933479B
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- screen plate
- foam
- spray head
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- fire
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C27/00—Fire-fighting land vehicles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/02—Making of fire-extinguishing materials immediately before use of foam
Abstract
The invention belongs to the technical field of fire trucks, in particular to an intelligent large-flow compressed air foam injection fire truck which comprises a truck body and a carriage; the vehicle body comprises a vehicle head and a vehicle frame; the carriage is fixedly arranged on the frame; a cab and a power device are arranged in the locomotive head to drive the fire truck to run; a compressed air foam fire extinguishing system is installed in the carriage; the foam output by the compressed air foam fire extinguishing system is conveyed to a spray head through a fire hose and is sprayed out; the invention has simple structure, and can effectively prevent external dust from entering the spray head when the spray head is placed, so that the spray head is difficult to clean and the foam is influenced to be sprayed.
Description
Technical Field
The invention belongs to the technical field of fire trucks, and particularly relates to an intelligent high-flow compressed air foam injection fire truck.
Background
At present, fire fighting equipment for fighting large petrochemical fire is mainly a large-flow air-suction type foam gun and a non-air-suction type foam gun. The large-flow air suction type foam gun is mainly based on the Venturi effect, low-power foam is generated through negative-pressure air suction, the foam liquid separation time is short, the stability is low, and the fire extinguishing and afterburning resisting effects are limited. The large-flow non-air-breathing foam cannon sprays foam solution from the cannon mouth, the foam solution is mixed with air to foam through mutual collision in the air, the foam performance is greatly and unstably influenced by air resistance and self dispersion condition, the foam liquid separation time is short, and the fire extinguishing and afterburning resistance are insufficient. The fire extinguishing and re-burning resisting effects of the equipment are poor when the equipment is used for extinguishing large petrochemical fire, a large amount of fire-fighting water and foam extinguishing agent are required to be consumed, and the actual fire extinguishing requirement is difficult to meet. The compressed air foam fire extinguishing technology (CAFS) is characterized in that foam is generated by injecting air into a foam solution in a positive pressure mode, and then the foam is sprayed to a fire source through a fire pump, so that the foam is uniform, fine and smooth, long in liquid separation time, good in stability, high in fire extinguishing efficiency and strong in re-ignition resistance. In the using process, foam generated by the compressed air foam fire extinguishing system is sprayed to a fire source through a spray head installed on a fire fighting truck or sprayed out from the spray head at the tail end of a fire hose after being conveyed for a certain distance through the fire hose. But finishing in the conflagration rescue, the shower nozzle is when normally placing, and impurity such as dust is got into easily to its nozzle inside, is difficult to the clearance to when carrying out fire control rescue with the spray gun, its inside foam can't normally spout, influences the conflagration rescue, simultaneously, the inside too much impurity back that gets into of shower nozzle, influences the normal use of shower nozzle easily, makes its life greatly reduced, in addition, if frequently maintain and change nozzle inside, the cost is too high again.
Some technical solutions related to nozzles also exist in the prior art, for example, chinese patent application No. CN201921973684.8 discloses a fire-fighting foam gun nozzle, which includes a nozzle tube, an anti-clogging mechanism is disposed inside the nozzle tube, and one end of the anti-clogging mechanism extends to the outside of one side of the nozzle tube; the anti-blocking mechanism comprises two baffle plates, a pressing plate is arranged on the other side of each baffle plate, and supporting plates are arranged on the outer sides of the pressing plates. The inside action part quantity of shower nozzle in this scheme is more, and the structure is complicated relatively, and the possibility of breaking down is higher in the in-service use, simultaneously, uses the back for a long time, exposes the spring in the shower nozzle inside and receives the corruption of foam easily, influences the normal behavior of spring, makes the elasticity of spring reduce to make the shower nozzle can not seal completely when placing.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problem that impurities such as dust and the like easily enter the nozzle and are difficult to clean, so that the nozzle cannot be normally used in the prior art, meanwhile, the number of parts in the nozzle is reduced, the structural complexity is reduced, and the service life and the reliability of the nozzle are improved, the invention provides the intelligent high-flow compressed air foam injection fire truck.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to an intelligent large-flow compressed air foam injection fire engine which comprises an engine body and a carriage; the vehicle body comprises a vehicle head and a vehicle frame; the carriage is fixedly arranged on the frame; a cab and a power device are arranged in the locomotive head to drive the fire truck to run;
a water storage tank and a foam tank are fixedly arranged in the carriage; a foam proportion mixing chamber is fixedly arranged in the carriage; the fire-fighting water stored in the water storage tank is conveyed to the foam proportion mixing chamber through a fire-fighting water pump; the foam stock solution stored in the foam tank is conveyed into a foam proportion mixing chamber through a foam pump; a gas-liquid mixer is fixedly arranged in the carriage; the water and the foam liquid mixed in the foam proportion mixing chamber are conveyed into a gas-liquid mixer; an air compressor is fixedly installed in the carriage, and compressed air generated by the air compressor is input into the gas-liquid mixer; the foam liquid in the gas-liquid mixer is uniformly mixed and stirred with compressed air to generate a large amount of homogeneous and fine foam with pressure; foam generated in the gas-liquid mixer is conveyed to a spray head through a fire hose and is sprayed out;
a controller is fixedly arranged in the carriage; the controller is electrically connected with the fire pump and the foam pump respectively; a first flow meter is fixedly arranged on a pipeline between the fire pump and the foam proportion mixing chamber, and the first flow meter is electrically connected with the controller; a second flow meter is fixedly arranged on a pipeline between the foam pump and the foam proportion mixing chamber, and the second flow meter is electrically connected with the controller; a third flow meter is fixedly arranged on a pipeline between the air compressor and the gas-liquid mixer, and the third flow meter is electrically connected with the controller; a fourth flowmeter is fixedly installed on a pipeline at the outlet of the gas-liquid mixer and is electrically connected with the controller;
a first screen plate is fixedly arranged in the spray head; the first screen plate is uniformly provided with first through holes; a second screen plate is slidably arranged in the spray head; through holes II are uniformly formed in the second screen plate; a limiting ring is fixedly arranged on the inner wall in the spray head; the distance between the limiting ring and the opening of the spray head is smaller than the distance between the second screen plate and the opening of the spray head; the distance between the second screen plate and the opening of the spray head is smaller than the distance between the first screen plate and the opening of the spray head; the first screen plate and the second screen plate are both magnetic, and a magnetic force for mutual attraction exists between the first screen plate and the second screen plate; a first bulge is arranged on the side surface of the first screen plate facing the second screen plate; a second bulge is arranged on the side surface of the second screen plate facing the first screen plate; when the first screen plate and the second screen plate are close to each other under the action of magnetic force, the first bulge is inserted into the second through hole, and the second bulge is inserted into the first through hole; when the first screen plate and the second screen plate are close to each other under the action of magnetic force, a gap is always reserved between the first screen plate and the second screen plate;
the outer side wall of the spray head is fixedly provided with a communicating pipe; both ends of the communicating pipe are communicated to the inside of the spray head; the distance between one end of the communicating pipe and the opening of the spray head is larger than the distance between the first screen plate and the opening of the spray head; the other end of the communicating pipe is positioned in a gap between the first screen plate and the second screen plate;
when the fire fighting truck works, a fireman simultaneously starts the fire pump, the foam pump and the air compressor through the controller, so that water and foam stock solution are conveyed to the foam proportion mixing chamber through the fire pump and the foam pump to be mixed, then the mixed foam solution is conveyed to the gas-liquid mixer to be mixed with compressed air conveyed by the air compressor, a large amount of homogeneous and fine foam with pressure is generated through the stirring action of the compressed air, finally, the generated foam with pressure is conveyed to the spray head through a fire hose and is sprayed out of the spray head to cover a fire source, the extinguishing or control of the fire situation is completed, the loss caused by the fire situation is reduced, meanwhile, in the using process, the controller receives the data of the first flowmeter, the second flowmeter, the third flowmeter and the fourth flowmeter, so that the water quantity and the foam mixing proportion are accurately judged, and simultaneously, when the foam mixing proportion does not meet the actual use requirement, the controller changes the volume of the foam stock solution conveyed into the foam proportion mixing chamber through controlling the foam pump, so as to accurately regulate and control the content proportion of the foam sprayed from the spray head, thereby ensuring the good fire extinguishing effect of the sprayed foam, and meanwhile, after the foam mixing proportion is preset in the controller, the controller can automatically regulate the proportion of the sprayed foam according to the received data in the use process, so that the foam extinguishing system is suitable, namely a compressed air foam extinguishing system (CAFS) is formed;
meanwhile, after the fire fighting truck is used, impurities such as dust and the like in the environment can easily enter the spray head in the normal placing process of the spray head on the fire fighting truck, the influence is generated on the spray head, the spray head breaks down in the using process, so that a fire fighter can make mistakes in the fire extinguishing process, the fire condition is enlarged, and personnel injury is caused, meanwhile, when a first mesh plate in the spray head passes through foam, due to the blocking effect of the first mesh plate on the passing foam flow, pressure difference exists on two sides of the first mesh plate, the pressure of one side, close to the opening of the spray head, of the first mesh plate is relatively small, meanwhile, due to the fact that a communicating pipe is fixedly installed on the spray head, and the communicating pipe communicates the spaces on two sides of the first mesh plate in the spray head, in the using process, the foam flow in the spray head reaches the side with lower pressure of the first mesh plate, namely the space between the first mesh plate and the second mesh plate, meanwhile, because the first screen plate and the second screen plate have magnetic force of mutual attraction, and when the first screen plate and the second screen plate attract each other, the first through hole on the first screen plate and the second through hole are blocked by the second bulge, and the second through hole is blocked by the first bulge, after foam liquid reaches the space between the first screen plate and the second screen plate through the communicating pipe, the second screen plate is pushed by the foam liquid which is gradually increased, so that the first through hole and the second through hole are opened, the foam liquid flows conveniently, and then the foam liquid is sprayed out from the spray head, meanwhile, after the fire is extinguished, no foam liquid is sprayed out from the spray head, no new foam liquid is added between the first screen plate and the second screen plate, the second screen plate is pushed and extruded by the foam liquid, the second screen plate is close to the first screen plate under the action of the magnetic attraction, so that the first screen plate and the second screen plate are mutually sealed, the space inside the spray head is isolated from the external environment, and external dust is reduced to enter the spray head and is difficult to be cleaned, the foam ejection is affected;
simultaneously, in the use, when the shower nozzle department is carried through longer fire hose to the foam after the completion of mixing, the foam is after the transport of longer distance, imbibition or the condition of polymerization appear easily, influence the quality of foam, set up otter board one and otter board two in the shower nozzle, the foam of carrying shower nozzle department is when passing through otter board one and otter board two, the foam receives the extrusion of through-hole one and through-hole two, stir, resume the fine and smooth degree of foam to a certain extent, guarantee the quality of spun foam, improve the fire extinguishing effects of foam, and simultaneously, in the use, the space between otter board one and the otter board two produces the effect of vortex, carry out certain stirring to the foam, further improve the quality of spun foam.
Preferably, a positioning block is arranged on the side surface of the second screen plate; a positioning groove is formed in the inner wall of the spray head; the positioning groove is positioned between the first screen plate and the limiting ring; the positioning block is inserted into the positioning groove, and when the screen plate II moves, the positioning block slides in the positioning groove along the length direction of the spray head;
when the fire fighting nozzle works, the second screen plate moves under the pushing of foam liquid in the process of using the nozzle and spraying foam, meanwhile, after the fire fighting is finished, the foam is not sprayed out from the nozzle, the second screen plate returns to the original position under the action of magnetic force, the second bulge on the second screen plate is inserted into the first through hole on the first screen plate after the second screen plate returns to the original position, the first bulge on the first screen plate is inserted into the second through hole on the second screen plate, so that the nozzle and the external environment are isolated from each other, impurities such as dust and the like in the environment are prevented from entering the nozzle, meanwhile, the second screen plate can be ensured not to deflect in the moving process through the mutual matching between the positioning groove and the positioning block, the first through hole and the second through hole cannot be normally closed, the impurities such as dust and the like in the external environment enter the nozzle, the cleaning is difficult, and the normal spraying of the foam is influenced when the nozzle is used, affecting the fire fighting of the firemen.
Preferably, a guide plate is fixedly arranged on the inner wall of one end, positioned between the first screen plate and the second screen plate, of the communicating pipe; the guide plate is spiral; the central line of one end of the communicating pipe between the first screen plate and the second screen plate is superposed with the tangent line of the inner wall in the spray head; the middle position of the part of the communicating pipe outside the nozzle is disconnected and is connected with each other through two mutually matched joints;
when in use, under the blockage of the first screen plate, pressure difference exists on two sides of the first screen plate, therefore, the foam on the side of the mesh plate where the pressure is relatively high reaches the side of the mesh plate where the pressure is relatively low through the communication pipe, and at the same time, in the process of flowing the foam liquid through the communicating pipe, because the spiral guide plate is fixedly arranged in the outlet of the communicating pipe between the first screen plate and the second screen plate, therefore, the foam liquid flowing out of the communicating pipe has the tendency of rotating, the foam liquid with the tendency of rotating sprayed out of the communicating pipe is stirred in the space between the first screen plate and the second screen plate, the flowing state of the foam liquid is damaged, the turbulent flow effect is improved, therefore, the foam is regenerated, and the influence of long-distance conveying on the fineness and the quality of the foam is reduced, so that the fire extinguishing effect of the foam is not influenced after the foam is conveyed for a long distance;
meanwhile, the center line of the outlet of the communicating pipe between the first screen plate and the second screen plate is superposed with the tangent line of the inner wall of the sprayer, so that foam sprayed from the communicating pipe tends to rotate around the center line of the sprayer between the first screen plate and the second screen plate, the stirring and turbulence effects on the foam in the sprayer are further improved, the uniform mixing degree of the foam, water and air is improved, and the possibility of liquid separation of the foam is reduced;
meanwhile, in the using process, when the sprayer is stopped to be used, the communicating pipe is disconnected from the joint, the joint is connected to the water pipe, clear water is conveyed through the water pipe to wash the first screen plate and the second screen plate in the sprayer, a backflushing effect is generated at the first screen plate and the second screen plate, impurities existing in foam and accumulated on the first screen plate and the second screen plate are fully removed, and the problem that the normal spraying of the foam from the sprayer is influenced due to the blockage of the first screen plate and the second screen plate in the long-term using process is avoided.
Preferably, a conical section is arranged inside the spray head; the central line of the conical section and the central line of the spray head are overlapped; the distance between the conical end and the opening of the spray head is smaller than the distance between the second screen plate and the opening of the spray head; the diameter of one end, facing the opening of the spray head, of the conical section is smaller than that of one end, facing the second screen plate, of the conical section; one end with a large diameter in the conical section is contacted with the side surface of the limiting ring facing the nozzle opening;
when the foam extinguishing device works, the conical section is arranged in the nozzle, so that foam which is further stirred and mixed by the first screen plate and the second screen plate is acted by the conical section, the polymerizability of foam liquid is improved, the dispersion speed of the foam liquid after leaving the outlet of the nozzle is reduced, the spraying distance of the foam liquid is increased, and the foam extinguishing effect is improved.
Preferably, a cavity is formed inside the limiting block; a movable plate is slidably mounted in the cavity; a spring is fixedly arranged in the cavity; one end of the spring is fixedly arranged on the side face, close to the second screen plate, of the cavity; the other end of the spring is fixedly connected to the movable plate; the distance between the spring and the second screen plate is smaller than the distance between the movable plate and the second screen plate; when the spray head is used, the spring is in a stretching state; the movable plate has magnetism, and a repulsive magnetic force exists between the movable plate and the second screen plate;
when the sprayer is used, due to the fact that repulsive magnetic force exists between the movable plate and the second screen plate, when the sprayer is used, the second screen plate is separated from the first screen plate, the movable plate moves towards the opening direction close to the sprayer under the action of magnetic force of the second screen plate, meanwhile, due to the fact that the spring is located between the movable plate and the second screen plate, after the movable plate moves towards the opening direction of the sprayer, the spring is in a stretching state under the action of the movable plate, the movable plate is prevented from moving in the cavity continuously, meanwhile, when the sprayer is stopped to be used, the movable plate returns to the original position under the action of the spring after the second screen plate is close to the first screen plate under the action of magnetic attraction, meanwhile, due to the fact that repulsive magnetic force exists between the movable plate and the second screen plate, after the movable plate returns to the original position, the movable plate has pushing force pointing to the first screen plate through the action of the magnetic force, guarantee otter board two and can be close to otter board one, thereby accomplish the closure to through-hole one and through-hole two, prevent that impurity such as dust in the external environment gets into inside the shower nozzle, and simultaneously, through the effect of fly leaf to the magnetic thrust of otter board two, can further improve the stability of otter board two when the shower nozzle is placed, reduce otter board two and receive external impact when the shower nozzle is placed, the influence of vibration, lead to otter board two and otter board alternate segregation, and then make through-hole one open with through-hole two, lead to the possibility that impurity such as dust in the external environment enters into the shower nozzle.
Preferably, an air bag is fixedly arranged in the cavity; the distance between the air bag and the opening of the spray head is smaller than the distance between the movable plate and the opening of the spray head; the side face of the movable plate far away from the second screen plate is fixedly connected with the air bag; a through hole is formed in the side wall of the spray head; one end of the via hole is communicated with the air bag; the other end of the conducting hole is communicated to the positioning groove; the opening of the conducting hole in the positioning groove is positioned at one end of the positioning groove close to the limiting ring;
when the shower nozzle is in use after the shower nozzle is placed for a period of time, the gas discharged from the gas bag blows the positioning groove, and meanwhile, after the shower nozzle is placed for a period of time, impurities such as external dust and the like cannot penetrate through the first screen plate and the second screen plate to enter the shower nozzle under the action of the first screen plate and the second screen plate, but in the placing process, the external dust can reach the position between the outlet of the shower nozzle and the second screen plate, consequently, at the in-process that the shower nozzle was placed, can get into the dust in the constant head tank, it dies to lead to the locating piece to appear blocking when sliding in the constant head tank easily, lead to otter board two can not arrive preset position smoothly or otter board two blocks the shutoff through-hole one and through-hole two when the shower nozzle uses, make the foam normally discharge, simultaneously, blow through from the spun air current in the conducting hole, can get rid of the dust of the existence in the constant head tank, guarantee that otter board two slides smoothly, thereby make the shower nozzle open smoothly when using, avoid shower nozzle discharge foam to be obstructed, influence the fire fighter and put out a fire disaster.
The invention has the following beneficial effects:
1. according to the intelligent high-flow compressed air foam injection fire fighting truck, the first screen plate, the second screen plate, the first through hole, the second through hole, the first bulge and the second bulge are arranged, when a spray head stops using, the first screen plate and the second screen plate are close to each other towards the second screen plate under the action of magnetic attraction between the first screen plate and the second screen plate, so that the first bulge is inserted into the second through hole, the second bulge is inserted into the first through hole, the spray head is sealed, external dust is prevented from entering the spray head, and the problem that the dust entering the spray head is difficult to clean and the foam is prevented from being smoothly sprayed out is avoided.
2. The invention relates to an intelligent large-flow compressed air foam injection fire fighting truck, which is characterized in that a movable plate, a spring, an air bag, a via hole and a positioning groove are arranged; when the sprayer is placed for a period of time and then reused, the movable plate is driven to move under the action of the repulsive magnetic force between the second screen plate and the movable plate, meanwhile, the movable plate presses the air bag, so that the air in the air bag is sprayed into the positioning groove through the through hole, the dust generated after the spray head is placed in the positioning groove for a period of time is removed, so that the problem that the spray head can not be normally opened and can spray foam when in use due to the fact that the second screen plate can not move smoothly is avoided, and meanwhile, when the second screen plate is close to the first screen plate in the using process, the movable plate returns to the original position under the action of the spring, so that the second screen plate is tightly attached to the first screen plate under the action of the mutually repulsive magnetic force of the movable plates, the influence of external impact and vibration on the second screen plate when the spray head is placed is reduced, the second screen plate is separated from the first screen plate, and then the first through hole and the second through hole are opened, so that the possibility that impurities such as dust in the external environment enter the spray head is caused.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic illustration of a piping system of the fire engine of the present invention;
FIG. 2 is a schematic structural view of a sprinkler head of the fire engine of the present invention;
in the figure: the nozzle comprises a nozzle 1, a positioning groove 11, a via hole 12, a first screen 2, a first through hole 21, a first bulge 22, a second screen 3, a second through hole 31, a second bulge 32, a positioning block 33, a communicating pipe 4, a guide plate 41, a joint 42, a limiting ring 5, a cavity 51, a movable plate 52, an air bag 53, a spring 54 and a conical section 6.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 and 2, the intelligent high-flow compressed air foam injection fire engine comprises an engine body and a carriage; the vehicle body comprises a vehicle head and a vehicle frame; the carriage is fixedly arranged on the frame; a cab and a power device are arranged in the locomotive head to drive the fire truck to run;
a water storage tank and a foam tank are fixedly arranged in the carriage; a foam proportion mixing chamber is fixedly arranged in the carriage; the fire-fighting water stored in the water storage tank is conveyed to the foam proportion mixing chamber through a fire-fighting water pump; the foam stock solution stored in the foam tank is conveyed into a foam proportion mixing chamber through a foam pump; a gas-liquid mixer is fixedly arranged in the carriage; the water and the foam liquid mixed in the foam proportion mixing chamber are conveyed into a gas-liquid mixer; an air compressor is fixedly installed in the carriage, and compressed air generated by the air compressor is input into the gas-liquid mixer; the foam liquid in the gas-liquid mixer is uniformly mixed and stirred with compressed air to generate a large amount of homogeneous and fine foam with pressure; foam generated in the gas-liquid mixer is conveyed to the spray head 1 through a fire hose and is sprayed out;
a controller is fixedly arranged in the carriage; the controller is electrically connected with the fire pump and the foam pump respectively; a first flow meter is fixedly arranged on a pipeline between the fire pump and the foam proportion mixing chamber, and the first flow meter is electrically connected with the controller; a second flow meter is fixedly arranged on a pipeline between the foam pump and the foam proportion mixing chamber, and the second flow meter is electrically connected with the controller; a third flow meter is fixedly arranged on a pipeline between the air compressor and the gas-liquid mixer, and the third flow meter is electrically connected with the controller; a fourth flowmeter is fixedly installed on a pipeline at the outlet of the gas-liquid mixer and is electrically connected with the controller;
a first screen plate 2 is fixedly arranged in the spray head 1; through holes I21 are uniformly formed in the first screen plate 2; a second screen plate 3 is slidably arranged in the spray head 1; through holes II 31 are uniformly formed in the screen plate II 3; a limiting ring 5 is fixedly arranged on the inner wall of the spray head 1; the distance between the limiting ring 5 and the opening of the spray head 1 is smaller than the distance between the second screen plate 3 and the opening of the spray head 1; the distance between the second screen plate 3 and the opening of the sprayer 1 is smaller than the distance between the first screen plate 2 and the opening of the sprayer 1; the first screen plate 2 and the second screen plate 3 are both magnetic, and a magnetic force of mutual attraction exists between the first screen plate and the second screen plate; a first bulge 22 is arranged on the side surface of the first screen plate 2 facing the second screen plate 3; a second bulge 32 is arranged on the side surface of the second screen plate 3 facing the first screen plate 2; when the first screen plate 2 and the second screen plate 3 are close to each other under the action of magnetic force, the first bulge 22 is inserted into the second through hole 31, and the second bulge 32 is inserted into the first through hole 21; when the first screen plate 2 and the second screen plate 3 are close to each other under the action of magnetic force, a gap is always reserved between the first screen plate and the second screen plate;
the outer side wall of the spray head 1 is fixedly provided with a communicating pipe 4; both ends of the communicating pipe 4 are communicated to the inside of the nozzle 1; the distance between one end of the communicating pipe 4 and the opening of the spray head 1 is larger than the distance between the first screen plate 2 and the opening of the spray head 1; the other end of the communicating pipe 4 is positioned in a gap between the first screen plate 2 and the second screen plate 3;
when the fire fighting truck works, a fireman simultaneously starts the fire pump, the foam pump and the air compressor through the controller, so that water and foam stock solution are conveyed to the foam proportion mixing chamber through the fire pump and the foam pump to be mixed, then the mixed foam solution is conveyed to the gas-liquid mixer to be mixed with compressed air conveyed by the air compressor, a large amount of homogeneous and fine foam with pressure is generated through the stirring action of the compressed air, finally, the generated foam with pressure is conveyed to the spray head 1 through a fire hose and is sprayed out of the spray head 1 to cover a fire source, the extinguishing or control of the fire situation is completed, the loss caused by the fire situation is reduced, meanwhile, in the using process, the controller receives the data of the first flowmeter, the second flowmeter, the third flowmeter and the fourth flowmeter, so that the water quantity and the foam mixing proportion are accurately judged, meanwhile, when the foam mixing proportion does not meet the actual use requirement, the controller changes the volume of the foam stock solution conveyed into the foam proportion mixing chamber through controlling the foam pump, so as to accurately regulate and control the content proportion of the foam sprayed from the spray head 1 and ensure the good fire extinguishing effect of the sprayed foam, and meanwhile, after the foam mixing proportion is preset in the controller, the controller can automatically regulate the proportion of the sprayed foam according to the received data in the use process so as to be suitable, namely a compressed air foam fire extinguishing system (CAFS) is formed;
meanwhile, after the fire fighting truck is used, impurities such as dust and the like in the environment can easily enter the spray head 1 in the normal placing process of the spray head 1 on the fire fighting truck, the influence is generated on the spray head 1, the spray head 1 breaks down in the using process, so that a fire fighter can make a mistake in the fire extinguishing process, the fire situation is enlarged, and personnel injury is caused, meanwhile, when a mesh plate 2 in the spray head 1 passes through foam, because the mesh plate 2 blocks the passing foam flow, pressure difference exists on two sides of the mesh plate 2, the pressure of one side, close to the opening of the spray head 1, of the mesh plate 2 is relatively small, meanwhile, because the spray head 1 is fixedly provided with the communicating pipe 4, and the communicating pipe 4 communicates the spaces on two sides of the mesh plate 2 in the spray head 1, therefore, in the using process, the foam flow in the spray head 1 reaches one side, with the lower pressure of the mesh plate 2, through the communicating pipe 4, namely, in the space between the first screen plate 2 and the second screen plate 3, simultaneously, because the first screen plate 2 and the second screen plate 3 have magnetic force of mutual attraction, and when the first screen plate 2 and the second screen plate 3 attract each other, the first through hole 21 on the first screen plate 2 and the second through hole 31 are blocked by the second bulge 32, and the second through hole 31 is blocked by the first bulge 22, after foam liquid reaches between the first screen plate 2 and the second screen plate 3 through the communicating pipe 4, the second screen plate 3 is pushed by the foam liquid which is gradually increased, so that the first through hole 21 and the second through hole 31 are opened, the foam liquid flows conveniently and is sprayed out from the spray head 1, meanwhile, after fire extinguishment is finished, no foam liquid is sprayed out from the spray head 1, after no additional foam liquid is added between the first screen plate 2 and the second screen plate 3, the second screen plate 3 is pushed and extruded by the foam liquid, the second screen plate 3 is close to the first screen plate 2 under the action of magnetic attraction, so that the first screen plate 2 and the second screen plate 3 are mutually closed, the internal space of the spray head 1 is isolated from the external environment, so that external dust is prevented from entering the spray head 1 and being difficult to clean, and foam spraying is influenced;
meanwhile, in the using process, when the foam after being mixed is conveyed to the spray head 1 through a longer fire hose, after the foam is conveyed for a long distance, the situation of imbibition or polymerization is easy to occur, the quality of the foam is influenced, the first mesh plate 2 and the second mesh plate 3 are arranged in the spray head 1, when the foam conveyed to the spray head 1 passes through the first mesh plate 2 and the second mesh plate 3, the foam is extruded and stirred by the first through hole 21 and the second through hole 31, the fineness of the foam is recovered to a certain degree, the quality of the sprayed foam is ensured, the fire extinguishing effect of the foam is improved, meanwhile, in the using process, the space between the first mesh plate 2 and the second mesh plate 3 generates a turbulent flow effect, certain stirring is performed on the foam, and the quality of the sprayed foam is further improved.
As an embodiment of the present invention, a positioning block 33 is disposed on a side surface of the second mesh plate 3; a positioning groove 11 is formed in the inner wall of the spray head 1; the positioning groove 11 is positioned between the first screen plate 2 and the limiting ring 5; the positioning block 33 is inserted into the positioning groove 11, and when the screen plate II 3 moves, the positioning block 33 slides in the positioning groove 11 along the length direction of the spray head 1;
when the sprayer works, the second screen plate 3 moves under the pushing of foam liquid in the process of using the sprayer 1 and spraying foam, meanwhile, after fire fighting is completed, no foam is sprayed at the sprayer 1, the second screen plate 3 returns to the original position under the action of magnetic force, and after the second screen plate 3 returns to the original position, the second protrusions 32 on the second screen plate 3 are inserted into the first through holes 21 on the first screen plate 2, and the first protrusions 22 on the first screen plate 2 are inserted into the second through holes 31 on the second screen plate 3, so that the sprayer 1 and the external environment are isolated from each other, impurities such as dust in the environment are prevented from entering the sprayer 1, meanwhile, through the mutual matching between the positioning grooves 11 and the positioning blocks 33, the second screen plate 3 can be ensured not to deflect in the moving process, the first through holes 21 and the second through holes 31 cannot be normally closed, and impurities such as dust in the external environment can enter the sprayer 1, difficult to clean, and influence the normal blowout of foam when the spray head 1 is used, influence the fire fighter to the fire situation's suppression.
As an embodiment of the present invention, a flow guide plate 41 is fixedly installed on an inner wall of one end of the communication pipe 4 located between the first screen plate 2 and the second screen plate 3; the deflector 41 is spiral; the central line of one end of the communicating pipe 4 between the first screen plate 2 and the second screen plate 3 is superposed with the tangent line of the inner wall of the spray head 1; the middle position of the part of the communicating pipe 4 outside the spray head 1 is disconnected and is connected with each other through two mutually matched joints 42;
when in use, under the blocking of the first screen plate 2, pressure difference exists on two sides of the first screen plate 2, therefore, the foam located at the side of the net plate-2 where the pressure is relatively high reaches the side of the net plate-2 where the pressure is relatively low through the communicating pipe 4, and at the same time, in the process that the foam liquid flows through the communicating pipe 4, because the spiral guide plate 41 is fixedly arranged in the outlet of the communicating pipe 4 between the first screen plate 2 and the second screen plate 3, therefore, the foam liquid flowing out of the communicating pipe 4 has a tendency of rotating, the foam liquid sprayed out of the communicating pipe 4 and having the tendency of rotating is stirred in the space between the first mesh plate 2 and the second mesh plate 3, the flowing state of the foam liquid is destroyed, the turbulent flow effect is improved, therefore, the foam is regenerated, and the influence of long-distance conveying on the fineness and the quality of the foam is reduced, so that the fire extinguishing effect of the foam is not influenced after the foam is conveyed for a long distance;
meanwhile, the center line of the outlet of the communicating pipe 4 between the first screen plate 2 and the second screen plate 3 is superposed with the tangent line of the inner wall of the spray head 1, so that the foam sprayed from the communicating pipe 4 tends to rotate around the center line of the spray head 1 between the first screen plate 2 and the second screen plate 3, the stirring and turbulence effects on the foam in the spray head 1 are further improved, the uniform mixing degree of the foam, water and air is improved, and the possibility of liquid precipitation of the foam is reduced;
meanwhile, in the using process, when the sprayer 1 stops being used, the communicating pipe 4 is disconnected from the joint 42, the joint 42 is connected to a water pipe, clear water is conveyed through the water pipe to wash the first screen plate 2 and the second screen plate 3 in the sprayer 1, and a backflushing effect is generated at the first screen plate 2 and the second screen plate 3, so that impurities existing in foam and accumulated on the first screen plate 2 and the second screen plate 3 are fully removed, and the problem that the normal spraying of the foam from the sprayer 1 is influenced due to the blockage of the first screen plate 2 and the second screen plate 3 in the long-term use process is avoided.
As an embodiment of the invention, a conical section 6 is arranged inside the spray head 1; the central line of the conical section 6 is superposed with the central line of the spray head 1; the distance between the conical end and the opening of the spray head 1 is smaller than the distance between the second screen plate 3 and the opening of the spray head 1; the diameter of one end of the conical section 6 facing the opening of the spray head 1 is smaller than that of one end of the conical section 6 facing the second screen plate 3; one end with a large diameter in the conical section 6 is mutually contacted with the side surface of the limiting ring 5 facing the opening of the spray head 1;
when the foam extinguishing device works, the conical section 6 is arranged in the spray head 1, so that foam which is further stirred and mixed by the first screen plate 2 and the second screen plate 3 is acted by the conical section 6, the polymerizability of foam liquid is improved, the dispersion speed of the foam liquid after leaving the outlet of the spray head 1 is reduced, the spray distance of the foam liquid is increased, and the foam extinguishing effect is improved.
As an embodiment of the present invention, a cavity 51 is formed inside the limiting ring 5; a movable plate 52 is slidably mounted in the cavity 51; a spring 54 is fixedly arranged in the cavity 51; one end of the spring 54 is fixedly arranged on the side surface of the cavity 51 close to the second screen plate 3; the other end of the spring 54 is fixedly connected to the movable plate 52; the distance between the spring 54 and the second screen plate 3 is smaller than the distance between the movable plate 52 and the second screen plate 3; when the spray head 1 is used, the spring 54 is in a stretching state; the movable plate 52 has magnetism, and a repulsive magnetic force exists between the movable plate 52 and the second screen plate 3;
during operation, in the using process, due to the existence of the repulsive magnetic force between the movable plate 52 and the second screen plate 3, when the shower nozzle 1 is used, the second screen plate 3 is separated from the first screen plate 2, the movable plate 52 moves towards the opening direction close to the shower nozzle 1 under the magnetic force of the second screen plate 3, meanwhile, because the spring 54 is located between the movable plate 52 and the second screen plate 3, after the movable plate 52 moves towards the opening direction of the shower nozzle 1, the spring 54 is in a stretching state under the action of the movable plate 52, the movable plate 52 is prevented from continuously moving in the cavity 51, meanwhile, when the shower nozzle 1 stops using, after the second screen plate 3 approaches the first screen plate 2 under the magnetic attraction, the movable plate 52 returns to the original position under the action of the spring 54, meanwhile, due to the existence of the repulsive magnetic force between the movable plate 52 and the second screen plate 3, after the movable plate 52 returns to the original position, the fly leaf 52 has the thrust of directional otter board 2 direction to otter board two 3 through magnetic force effect, guarantee that otter board two 3 can be close to otter board one 2, thereby accomplish the closure to through-hole one 21 and through-hole two 31, prevent impurity such as dust among the external environment to get into shower nozzle 1 inside, and simultaneously, through the effect of fly leaf 52 to the magnetic thrust of otter board two 3, can further improve the stability of otter board two 3 when shower nozzle 1 is placed, it strikes to reduce otter board two 3 and receives the external world when shower nozzle 1 is placed, the influence of vibration, lead to otter board two 3 and otter board one 2 looks autosegregation, and then make through-hole one 21 and through-hole two 31 open, lead to the possibility that impurity such as dust among the external environment enters into shower nozzle 1.
In one embodiment of the present invention, an air bag 53 is fixedly installed in the cavity 51; the distance between the air bag 53 and the opening of the spray head 1 is smaller than the distance between the movable plate 52 and the opening of the spray head 1; the side surface of the movable plate 52 far away from the second mesh plate 3 is fixedly connected with the air bag 53; a through hole 12 is formed in the side wall of the spray head 1; one end of the via hole 12 and the air bag 53 are communicated with each other; the other end of the through hole 12 is communicated to the positioning groove 11; the opening of the through hole 12 in the positioning groove 11 is positioned at one end of the positioning groove 11 close to the limiting ring 5;
in operation, because the air bag 53 and the movable plate 52 are fixedly connected with each other, when the movable plate 52 returns to the original position under the action of the spring 54, the movable plate 52 drives the air bag 53 to expand, the internal space is increased, the air bag 53 sucks air from the external environment, meanwhile, when the shower head 1 is used after being placed for a period of time, when the movable plate 52 is moved towards the opening direction of the shower head 1 under the action of the mesh plate two 3, the air bag 53 is pressed by the movable plate 52, the volume of the air bag 53 is reduced, the air in the air bag 53 is discharged from the through hole 12, meanwhile, because the outlet of the through hole 12 is located in the positioning groove 11, the gas discharged from the air bag 53 blows the positioning groove 11, and at the same time, after the shower head 1 is placed for a period of time, under the action of the mesh plate one 2 and the mesh plate two 3, foreign matters such as external dust cannot pass through the mesh plate one 2 and the mesh plate two 3 to enter the shower head 1, however, in the process of placing the nozzle 1, external dust can reach the position between the outlet of the nozzle 1 and the second screen plate 3, so that in the process of placing the nozzle 1, dust can enter the positioning groove 11, the positioning block 33 is easily blocked when sliding in the positioning groove 11, the second screen plate 3 cannot smoothly reach a preset position when the nozzle 1 is used, or the first screen plate 3 is blocked to block and block the first through hole 21 and the second through hole 31, so that foam cannot be normally discharged, meanwhile, the dust existing in the positioning groove 11 can be removed through blowing of air flow sprayed from the through hole 12, and the smooth sliding of the second screen plate 3 is ensured, so that the nozzle 1 can be smoothly opened when being used, and the problem that the foam discharged from the nozzle 1 is blocked to influence a fire fighter to put out a fire is avoided.
The specific working process is as follows:
when the fire engine works, a fireman simultaneously starts the fire pump, the foam pump and the air compressor through the controller, so that water and foam stock solution are conveyed to the foam proportion mixing chamber through the fire pump and the foam pump to be mixed, then the mixed foam solution is conveyed to the gas-liquid mixer to be mixed with compressed air conveyed by the air compressor, a large amount of homogeneous and fine foam with pressure is generated through the stirring action of the compressed air, finally, the generated foam with pressure is conveyed to the spray head 1 through the fire hose to be sprayed out from the spray head 1 and covered on a fire source, meanwhile, in the using process, the controller receives the data of the flow meter I, the flow meter II, the flow meter III and the flow meter IV, so that the water quantity and the foam mixing proportion are accurately judged, and meanwhile, when the foam mixing proportion does not meet the actual use requirement, the controller controls the foam pump, the volume of the foam stock solution conveyed into the foam proportion mixing chamber is changed, so that the content proportion of the foam sprayed from the spray head 1 is accurately regulated, and meanwhile, after the foam mixing proportion is preset in the controller, the controller can automatically regulate the proportion of the sprayed foam according to the received data in the using process to make the proportion of the sprayed foam suitable, namely a compressed air foam fire extinguishing system (CAFS) is formed; meanwhile, after the fire fighting truck is used, impurities such as dust and the like in the environment can easily enter the spray head 1 in the normal placing process of the spray head 1 on the fire fighting truck, the use of the spray head 1 is affected, meanwhile, when foam passes through the screen plate I2 in the spray head 1, due to the blocking effect of the screen plate I2 on the passing foam flow, pressure difference exists on two sides of the screen plate I2, the pressure of one side, close to the opening of the spray head 1, of the screen plate I2 is relatively small, meanwhile, due to the fact that the communicating pipe 4 is fixedly installed on the spray head 1 and the communicating pipe 4 communicates the spaces on two sides of the screen plate I2 in the spray head 1, in the use process, the foam flow in the spray head 1 reaches the side with lower pressure of the screen plate I2 through the communicating pipe 4, namely the space between the screen plate I2 and the screen plate II 3, and meanwhile, due to the magnetic force of mutual attraction exists between the screen plate I2 and the screen plate II 3, and when the first screen plate 2 and the second screen plate 3 are mutually attracted, the first through hole 21 on the first screen plate 2 and the second through hole 31 are blocked by the second bulge 32, and the second through hole 31 is blocked by the first bulge 22, therefore, after foam liquid reaches the space between the first screen plate 2 and the second screen plate 3 through the communicating pipe 4, the second screen plate 3 is pushed by the foam liquid which is gradually increased, so that the first through hole 21 and the second through hole 31 are opened, meanwhile, after fire extinguishment is finished, no foam liquid is sprayed out from the spray head 1, no additional foam liquid is added between the first screen plate 2 and the second screen plate 3, the second screen plate 3 is pushed by the foam liquid, the extrusion acting force is reduced, the second screen plate 3 is close to the first screen plate 2 under the action of magnetic attraction, so that the first screen plate 2 and the second screen plate 3 are mutually sealed, the internal space of the spray head 1 is isolated from the external environment, meanwhile, the first screen plate 2 and the second screen plate 3 are arranged in the spray head 1, and when foam after the water band is mixed is conveyed to the spray head 1 through a longer fire, when the foam conveyed to the spray head 1 passes through the first screen plate 2 and the second screen plate 3, the foam is extruded and stirred by the first through hole 21 and the second through hole 31, and meanwhile, in the using process, a turbulent flow effect is generated in the space between the first screen plate 2 and the second screen plate 3; because the second screen plate 3 moves under the pushing of the foam liquid in the process of using the sprayer 1 and spraying foam, simultaneously, after the fire is extinguished, no foam is sprayed from the sprayer 1, the second screen plate 3 returns to the original position under the action of magnetic force, and after the second screen plate 3 returns to the original position, the second projection 32 on the second screen plate 3 is inserted into the first through hole 21 on the first screen plate 2, the first projection 22 on the first screen plate 2 is inserted into the second through hole 31 on the second screen plate 3, and meanwhile, through the mutual matching between the positioning groove 11 and the positioning block 33, the second screen plate 3 is ensured not to deflect in the moving process; under the blockage of the first screen plate 2, pressure difference exists on two sides of the first screen plate 2, therefore, foam on the side with relatively higher pressure of the first screen plate 2 reaches the side with relatively lower pressure of the first screen plate 2 through the communicating pipe 4, meanwhile, in the process that foam liquid flows through the communicating pipe 4, because the communicating pipe 4 is fixedly provided with the spiral guide plate 41 in the outlet between the first screen plate 2 and the second screen plate 3, the foam liquid flowing out from the communicating pipe 4 has the tendency of rotating, the foam liquid with the tendency of rotating sprayed out from the communicating pipe 4 is stirred in the space between the first screen plate 2 and the second screen plate 3, meanwhile, because the center line of the outlet between the first screen plate 2 and the second screen plate 3 of the communicating pipe 4 is superposed with the tangent line of the inner wall of the sprayer 1, the foam sprayed out from the communicating pipe 4 has the tendency of rotating around the center line of the sprayer 1 between the first screen plate 2 and the second screen plate 3, stirring and disturbing the foam in the spray head 1, disconnecting the communicating pipe 4 from the joint 42 when the spray head 1 stops using, connecting the joint 42 to a water pipe, and conveying clean water through the water pipe to flush the first screen plate 2 and the second screen plate 3 in the spray head 1; the conical section 6 is arranged in the spray head 1, so that foams subjected to further stirring and mixing by the first screen plate 2 and the second screen plate 3 are acted by the conical section 6, and the polymerizability of the foam liquid is improved; because the movable plate 52 and the second screen plate 3 have repulsive magnetic force, when the shower nozzle 1 is used, the second screen plate 3 is separated from the first screen plate 2, the movable plate 52 is moved towards the opening direction close to the shower nozzle 1 under the magnetic force of the second screen plate 3, and at the same time, because the spring 54 is positioned between the movable plate 52 and the second screen plate 3, after the movable plate 52 is moved towards the opening direction of the shower nozzle 1, the spring 54 is in a stretching state under the action of the movable plate 52, the movable plate 52 is prevented from continuously moving in the cavity 51, and at the same time, when the shower nozzle 1 is stopped to be used, after the second screen plate 3 is close to the first screen plate 2 under the magnetic attraction, the movable plate 52 returns to the original position under the action of the spring 54, and simultaneously, because the repulsive magnetic force exists between the movable plate 52 and the second screen plate 3, the movable plate 52 has a thrust force pointing to the direction of the first screen plate 2 through the magnetic force after the movable plate 52 returns to the original position, enabling the screen plate II 3 to be close to the screen plate I2, and completing the sealing of the through hole I21 and the through hole II 31; because the air bag 53 and the movable plate 52 are fixedly connected with each other, when the movable plate 52 returns to the original position under the action of the spring 54, the movable plate 52 drives the air bag 53 to expand, the internal space is increased, the air bag 53 sucks air from the external environment, meanwhile, when the shower head 1 is used after being placed for a period of time, when the movable plate 52 moves towards the opening direction of the shower head 1 under the action of the mesh plate two 3, the air bag 53 is pressed by the movable plate 52, the volume of the air bag 53 is reduced, the air in the air bag 53 is discharged from the through hole 12, and meanwhile, because the outlet of the through hole 12 is positioned in the positioning groove 11, the air discharged from the air bag 53 blows the positioning groove 11, and dust existing in the positioning groove 11 is removed.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a large-traffic compressed air foam of intelligence sprays fire engine which characterized in that: comprises a vehicle body and a carriage; the vehicle body comprises a vehicle head and a vehicle frame; the carriage is fixedly arranged on the frame; a cab and a power device are arranged in the locomotive head to drive the fire truck to run;
a water storage tank and a foam tank are fixedly arranged in the carriage; a foam proportion mixing chamber is fixedly arranged in the carriage; the fire-fighting water stored in the water storage tank is conveyed to the foam proportion mixing chamber through a fire-fighting water pump; the foam stock solution stored in the foam tank is conveyed into a foam proportion mixing chamber through a foam pump; a gas-liquid mixer is fixedly arranged in the carriage; the water and the foam liquid mixed in the foam proportion mixing chamber are conveyed into a gas-liquid mixer; an air compressor is fixedly installed in the carriage, and compressed air generated by the air compressor is input into the gas-liquid mixer; foam liquid in the gas-liquid mixer is uniformly mixed and stirred with compressed air to generate homogeneous and fine foam with pressure; foam generated in the gas-liquid mixer is conveyed to the spray head (1) through a fire hose and is sprayed out;
a controller is fixedly arranged in the carriage; the controller is electrically connected with the fire pump and the foam pump respectively; a first flow meter is fixedly arranged on a pipeline between the fire pump and the foam proportion mixing chamber, and the first flow meter is electrically connected with the controller; a second flow meter is fixedly arranged on a pipeline between the foam pump and the foam proportion mixing chamber, and the second flow meter is electrically connected with the controller; a third flow meter is fixedly arranged on a pipeline between the air compressor and the gas-liquid mixer, and the third flow meter is electrically connected with the controller; a fourth flowmeter is fixedly installed on a pipeline at the outlet of the gas-liquid mixer and is electrically connected with the controller;
a first screen plate (2) is fixedly arranged in the spray head (1); through holes I (21) are uniformly formed in the first screen plate (2); a second screen plate (3) is slidably arranged in the spray head (1); through holes II (31) are uniformly formed in the screen plate II (3); a limiting ring (5) is fixedly arranged on the inner wall of the spray head (1); the distance between the limiting ring (5) and the opening of the spray head (1) is smaller than the distance between the second screen plate (3) and the opening of the spray head (1); the distance between the second screen plate (3) and the opening of the spray head (1) is smaller than the distance between the first screen plate (2) and the opening of the spray head (1); the first screen plate (2) and the second screen plate (3) are both magnetic, and a magnetic force of mutual attraction exists between the first screen plate and the second screen plate; a first bulge (22) is arranged on the side surface of the first screen plate (2) facing the second screen plate (3); a second bulge (32) is arranged on the side surface of the second screen plate (3) facing the first screen plate (2); when the first screen plate (2) and the second screen plate (3) are close to each other under the action of magnetic force, the first bulge (22) is inserted into the second through hole (31), and the second bulge (32) is inserted into the first through hole (21); when the first screen plate (2) and the second screen plate (3) approach each other under the action of magnetic force, a gap is always reserved between the first screen plate and the second screen plate;
the outer side wall of the spray head (1) is fixedly provided with a communicating pipe (4); two ends of the communicating pipe (4) are communicated to the inside of the nozzle (1); the distance between one end of the communicating pipe (4) and the opening of the spray head (1) is larger than the distance between the first screen plate (2) and the opening of the spray head (1); the other end of the communicating pipe (4) is positioned in a gap between the first screen plate (2) and the second screen plate (3).
2. The intelligent high-flow compressed air foam injection fire engine of claim 1, wherein: a positioning block (33) is arranged on the side surface of the second screen plate (3); a positioning groove (11) is formed in the inner wall of the spray head (1); the positioning groove (11) is positioned between the first screen plate (2) and the limiting ring (5); the positioning block (33) is inserted into the positioning groove (11), and when the second screen plate (3) moves, the positioning block (33) slides in the positioning groove (11) along the length direction of the sprayer (1).
3. The intelligent high-flow compressed air foam injection fire engine of claim 1, wherein: a guide plate (41) is fixedly arranged on the inner wall of one end of the communicating pipe (4) between the first screen plate (2) and the second screen plate (3); the deflector (41) is spiral; the central line of one end of the communicating pipe (4) between the first screen plate (2) and the second screen plate (3) is superposed with the tangent line of the inner wall in the nozzle (1); the middle position of the part of the communicating pipe (4) outside the spray head (1) is disconnected and is connected with each other through two connectors (42) which are matched with each other.
4. The intelligent high-flow compressed air foam injection fire engine of claim 1, wherein: a conical section (6) is arranged in the spray head (1); the central line of the conical section (6) is superposed with the central line of the spray head (1); the distance between the conical end and the opening of the spray head (1) is smaller than the distance between the second screen plate (3) and the opening of the spray head (1); the diameter of one end, facing the opening of the spray head (1), of the conical section (6) is smaller than that of one end, facing the second screen plate (3), of the conical section (6); the end with the large diameter in the conical section (6) is contacted with the side face of the limiting ring (5) facing the opening of the spray head (1).
5. The intelligent high-flow compressed air foam injection fire engine of claim 1, wherein: a cavity (51) is formed in the limiting ring (5); a movable plate (52) is slidably mounted in the cavity (51); a spring (54) is fixedly arranged in the cavity (51); one end of the spring (54) is fixedly arranged on the side surface of the cavity (51) close to the second screen plate (3); the other end of the spring (54) is fixedly connected to the movable plate (52); the distance between the spring (54) and the second screen plate (3) is smaller than the distance between the movable plate (52) and the second screen plate (3); when the spray head (1) is used, the spring (54) is in a stretching state; the movable plate (52) has magnetism, and mutually repulsive magnetic force exists between the movable plate (52) and the second screen plate (3).
6. The intelligent high-flow compressed air foam injection fire engine of claim 5, wherein: an air bag (53) is fixedly arranged in the cavity (51); the distance between the air bag (53) and the opening of the spray head (1) is smaller than the distance between the movable plate (52) and the opening of the spray head (1); the side surface of the movable plate (52) far away from the second screen plate (3) is fixedly connected with the air bag (53); a through hole (12) is formed in the side wall of the spray head (1); one end of the via hole (12) is communicated with the air bag (53); the other end of the through hole (12) is communicated to the positioning groove (11); the opening of the through hole (12) in the positioning groove (11) is positioned at one end of the positioning groove (11) close to the limiting ring (5).
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| CN202110242163.0A CN112933479B (en) | 2021-03-04 | 2021-03-04 | Intelligent large-flow compressed air foam injection fire fighting truck |
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| CN113577613B (en) * | 2021-08-10 | 2022-04-15 | 湖北江南专用特种汽车有限公司 | Large-traffic compressed air foam fire engine |
| CN115364407B (en) * | 2022-08-31 | 2023-07-25 | 徐工消防安全装备有限公司 | Telescopic fire-fighting foam foamer, system and foaming method |
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| US7384005B1 (en) * | 2005-02-02 | 2008-06-10 | Camco Manufacturing, Inc. | Tank spray head assembly |
| KR101367487B1 (en) * | 2006-11-30 | 2014-02-25 | 노미 보사이 가부시키가이샤 | High expansion foam firefighting equipment |
| CN201840804U (en) * | 2010-10-19 | 2011-05-25 | 公安部上海消防研究所 | Foam producing device used for fire experiment |
| EP3037176B1 (en) * | 2013-08-23 | 2018-04-25 | KSK Co., Ltd. | Nozzle device |
| CN106390342A (en) * | 2016-06-13 | 2017-02-15 | 西安新竹防灾救生设备有限公司 | Self-closing type foam spray nozzle |
| CN109045527B (en) * | 2018-07-03 | 2023-10-20 | 公安部天津消防研究所 | High-flow compressed air foam lifting jet fire truck and use method thereof |
| CN210309067U (en) * | 2019-05-17 | 2020-04-14 | 南京南欣医药技术研究院有限公司 | 3D printer nozzle |
| CN210355735U (en) * | 2019-06-21 | 2020-04-21 | 钟星建设集团有限公司 | Fire-fighting water curtain spraying system |
| CN211068874U (en) * | 2019-11-15 | 2020-07-24 | 兴化市泰龙消防器材有限公司 | Fire control foam gun nozzle |
| CN211752072U (en) * | 2020-01-19 | 2020-10-27 | 辽宁建筑职业学院 | Underground utility tunnel is water mist nozzle for extinguishing device |
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