阅读说明：本技术 一种大流量压缩空气泡沫消防车 (Large-traffic compressed air foam fire engine ) 是由 甘子林 于 2021-08-10 设计创作，主要内容包括：本发明属于消防灭火设备技术领域,具体的说是一种大流量压缩空气泡沫消防车；包括车身、进水管、泡沫液输送管、输出管、进气管、喷头和控制器；所述进水管靠近泡沫液输送管的端面直径缩小；所述输送管靠近进水管和泡沫液输送管的一端设置有扰流器；所述进水管靠近泡沫液输送管的端面倾斜设；本发明通过在输出管靠近进水管和泡沫液输送管的一端设置有扰流器,再与进水管靠近泡沫液输送管的端面倾斜设置相配合,从而达到水能够冲击到扰流器叶片表面使得扰流器转动的目的,进而对水与泡沫液进行搅拌,使得水与泡沫液的比例更加均匀,使得混合液与空气接触产生的泡沫更加均匀稳定,使得一种大流量压缩空气泡沫消防车的使用效果得到提高。(The invention belongs to the technical field of fire-fighting equipment, and particularly relates to a high-flow compressed air foam fire truck; comprises a vehicle body, a water inlet pipe, a foam liquid conveying pipe, an output pipe, an air inlet pipe, a spray head and a controller; the diameter of the end surface of the water inlet pipe close to the foam liquid conveying pipe is reduced; a spoiler is arranged at one end of the conveying pipe close to the water inlet pipe and the foam liquid conveying pipe; the end surface of the water inlet pipe close to the foam liquid conveying pipe is obliquely arranged; according to the invention, the spoiler is arranged at one end of the output pipe close to the water inlet pipe and the foam liquid conveying pipe, and is matched with the end face of the water inlet pipe close to the foam liquid conveying pipe in an inclined manner, so that the purpose that water can impact the surface of a blade of the spoiler to enable the spoiler to rotate is achieved, and further, the water and the foam liquid are stirred, so that the proportion of the water and the foam liquid is more uniform, the foam generated by the contact of the mixed liquid and the air is more uniform and stable, and the using effect of the high-flow compressed air foam fire truck is improved.)

1. A high-flow compressed air foam fire fighting truck comprises a truck body (1), a water inlet pipe (2), a foam liquid conveying pipe (3), an output pipe (4), an air inlet pipe, a spray head (5) and a controller; the method is characterized in that: the diameter of the end surface of the water inlet pipe (2) close to the foam liquid conveying pipe (3) is reduced; one end of the output pipe (4) close to the water inlet pipe (2) and the foam liquid conveying pipe (3) is provided with a spoiler (6); the spoiler (6) comprises a blade (64), a sleeve (63) and a rotating shaft (61); the rotating shaft (61) is fixedly connected inside the output pipe (4), and the surface of the rotating shaft (61) is rotatably connected with a sleeve (63); the sleeve (63) is fixedly connected with the blade (64); the end face of the water inlet pipe (2) close to the foam liquid conveying pipe (3) is obliquely arranged, and the outlet of the water inlet pipe (2) is aligned to the blade (64).

2. The high flow compressed air foam fire engine of claim 1, wherein: the outer surface of the water inlet pipe (2) close to the end surface of the foam liquid conveying pipe (3) is fixedly connected with an annular pipe (21); the section of the annular pipe (21) is trapezoidal, and the annular pipe (21) is communicated with the foam liquid conveying pipe (3); the end surface of the annular pipe (21) close to the spoiler (6) is uniformly provided with water spraying holes (22); the water spray holes (22) are communicated with the interior of the annular pipe (21).

3. The high flow compressed air foam fire engine of claim 2, wherein: the cross section of the blade (64) is arc-shaped.

4. A high flow compressed air foam fire engine as recited in claim 3, wherein: a contact cavity (7) is arranged between the water inlet pipe (2) and the output pipe (4); the diameter of the contact cavity (7) is larger than that of the water inlet pipe (2) and the output pipe (4); the spoiler (6) is fixed in the contact cavity (7) through a rotating shaft (61); the size of the spoiler (6) is smaller than that of the contact cavity (7).

5. The high flow compressed air foam fire engine of claim 4, wherein: a second groove (65) is formed in the inner wall, close to the rotating shaft (61), of the sleeve (63); a ball (62) is embedded in the second groove (65), and the second groove (65) is rotatably connected with the ball (62).

6. The high flow compressed air foam fire engine of claim 5, wherein: a first groove (51) is formed in the spray head (5); the first grooves (51) penetrate through the inner wall of the spray head (5), the number of the first grooves (51) is two, the first grooves (51) are symmetrically arranged, and electromagnetic blocks (52) are connected in the first grooves (51) in a sliding mode; the cross section of the electromagnetic blocks (52) is T-shaped, and the two electromagnetic blocks (52) are magnetically attracted.

7. The high flow compressed air foam fire engine of claim 6, wherein: and a protective net (23) is fixedly connected with the end face of the annular pipe (21) communicated with the foam liquid conveying pipe (3).

Technical Field

The invention belongs to the technical field of fire-fighting equipment, and particularly relates to a high-flow compressed air foam fire truck.

Background

When different places have fires, different fire extinguishing agents are often needed for extinguishing fire, for example, when certain chemical materials have fires, foam extinguishing agents are needed for extinguishing fire, and foam extinguishing agents with different concentrations are needed for extinguishing fire aiming at different chemical materials; the fire engine used at present is mostly provided with a water storage tank and a foaming agent storage tank which are connected with a fire main pipe through a manifold, and a booster pump and a manual control valve are respectively arranged on branch pipes connected with the water storage tank and the foaming agent storage tank; in the fire-fighting operation of fire disasters in different places, the proportion of the water and the foaming agent is completely controlled by manually operating a manual control valve; the accuracy of the control of the ratio of the water to the foaming agent completely depends on the experience of fire fighters; and the foam concentrate and water can not be fully stirred and mixed in the channel, so that the foam concentrate can not effectively form foam or the generated foam is too little, the fire extinguishing effect is influenced, and the waste of raw materials is caused.

For example, a chinese patent of CN201210474375.2 discloses an explosion-proof foam fire engine, which comprises a water storage tank, a foaming agent storage tank and an engine, wherein the water storage tank and the foaming agent storage tank are respectively communicated with a fire extinguishing agent main pipe through a transmission branch pipe, a fire water pump is arranged on the transmission branch pipe, the engine adopts an explosion-proof engine, an explosion-proof relay box and an explosion-proof metering control valve are arranged on the transmission branch pipe, and the fire water pump is provided with an explosion-proof DC-DC converter; the explosion-proof relay box acquires a water pipeline flow signal and a foam pipeline flow signal, and the mixing ratio of foam and water is obtained through calculation; the numerical value is compared with a mixing ratio numerical value given by a control panel, if the numerical value is different from the mixing ratio numerical value given by the control panel, a signal is transmitted to an explosion-proof metering control valve, and the flow of a foam pipeline is controlled to achieve a proper mixing ratio; the matched engine and the fire-fighting agent supply part on the anti-explosion foam fire truck are subjected to anti-explosion treatment, so that secondary disasters can be avoided, and the requirements on anti-explosion safety are met; however, the technical scheme also has certain disadvantages, and the technical scheme cannot well stir and mix the foam concentrate and the water, so that the proportion of the foam concentrate and the water is influenced, the generation of foam is further influenced, and the limitation of the technical scheme is caused.

In view of this, in order to overcome the above technical problems, the present invention provides a high-flow compressed air foam fire engine, which solves the above technical problems.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides the large-flow compressed air foam fire truck, the spoiler is arranged at one end, close to the water inlet pipe and the foam liquid conveying pipe, of the output pipe, and the spoiler is obliquely arranged and matched with the end surface, close to the foam liquid conveying pipe, of the water inlet pipe, so that the purpose that water can impact the surface of a blade of the spoiler to enable the spoiler to rotate is achieved, the water and the foam liquid are stirred, the proportion of the water and the foam liquid is enabled to be more uniform, foam generated by contact of a mixed liquid and air is enabled to be more uniform and stable, the using effect of the large-flow compressed air foam fire truck is improved, and the utilization rate of raw materials is also improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a high-flow compressed air foam fire fighting truck, which comprises a truck body, a water inlet pipe, a foam liquid conveying pipe, an output pipe, an air inlet pipe, a spray head and a controller, wherein the truck body is provided with a water inlet pipe and a foam liquid outlet pipe; the diameter of the end surface of the water inlet pipe close to the foam liquid conveying pipe is reduced; a spoiler is arranged at one end of the output pipe close to the water inlet pipe and the foam liquid conveying pipe; the spoiler comprises blades, a sleeve and a rotating shaft; the rotating shaft is fixedly connected inside the output pipe, and the surface of the rotating shaft is rotatably connected with a sleeve; the sleeve is fixedly connected with the blade; the end surface of the water inlet pipe, which is close to the foam liquid conveying pipe, is obliquely arranged, and the outlet of the water inlet pipe is aligned with the blades of the spoiler;

when the device works, the foam concentrate and water cannot be fully stirred and mixed in the channel, so that the foam concentrate cannot effectively form foam or the generated foam is too little, the fire extinguishing effect is influenced, and meanwhile, the waste of raw materials is caused;

the worker starts the water pump through the controller, and water is poured from the water inlet pipe; then, the operator opens the foam liquid conveying pipe through the controller, foam liquid flows in from the foam liquid conveying pipe at the moment, water flows out of the water inlet pipe and is mixed with the foam liquid, the water impacts the surface of the blade of the spoiler at the moment, the spoiler is driven to rotate, the spoiler stirs the water and the foam liquid, so that the water and the foam liquid are mixed uniformly in proportion, then the mixed liquid flows out through the output pipe and is contacted with air, and then foam is generated to be sprayed out of the spray nozzle to extinguish fire; and the inclined outlet of the water inlet pipe enables water to directly impact the blade surface of the spoiler after flowing out of the water inlet pipe instead of impacting the center of the spoiler, so that the rotation of the spoiler can be accelerated.

According to the invention, the spoiler is arranged at one end of the output pipe close to the water inlet pipe and the foam liquid conveying pipe, and is matched with the end face of the water inlet pipe close to the foam liquid conveying pipe in an inclined manner, so that the purpose that water can impact the surface of a blade of the spoiler to enable the spoiler to rotate is achieved, and further, the water and the foam liquid are stirred, so that the proportion of the water and the foam liquid is more uniform, the foam generated by the contact of the mixed liquid and the air is more uniform and stable, the use effect of the high-flow compressed air foam fire truck is improved, and the utilization rate of raw materials can also be improved.

Preferably, the outer surface of the water inlet pipe, which is close to the end face of the foam liquid conveying pipe, is fixedly connected with an annular pipe; the section of the annular pipe is trapezoidal, and the annular pipe is communicated with the foam liquid conveying pipe; the end surface of the annular pipe close to the spoiler is uniformly provided with water spray holes; the water spray holes are communicated with the interior of the annular pipe;

when the device works, a worker controls the foam liquid conveying pipe to be opened through the controller, foam liquid enters the annular pipe through the foam liquid conveying pipe, then the foam liquid is uniformly sprayed out of the annular pipe through the water spraying holes formed in the end face of the annular pipe, and the foam liquid is sprayed into the output pipe; meanwhile, the annular pipe is matched with the water spray holes, so that water cannot enter the foam concentrate conveying pipe, the water cannot be mixed with foam liquid which is not needed, the condition that the foam concentrate cannot be stored for a long time is avoided, and pollution and waste of raw materials are avoided;

according to the invention, the annular pipe is fixedly connected to the outer surface of the water inlet pipe close to the end face of the foam liquid conveying pipe, the annular pipe is communicated with the foam liquid conveying pipe, and the water spray holes are uniformly arranged on the end face of the annular pipe close to the spoiler to be matched with each other, so that the foam liquid can be sprayed into the output pipe through the water spray holes, the contact area between the foam liquid and water is increased, the foam liquid can be better mixed with the water, the mixing ratio of the foam liquid and the water is more uniform, the waste of raw materials is avoided, the use effect of the large-flow compressed air foam fire truck is further improved, and the utilization rate of the raw materials is further improved.

Preferably, the cross section of the blade is in the shape of a circular arc;

when the water-saving type water-saving device works, water is conveyed through the water inlet pipe and then impacts the surface of the blade, the cross section of the blade is in the shape of an arc, so that the blade can bear larger impact force and prolong the service life of the blade on one hand, and on the other hand, the water can flow along the arc-shaped plate after impacting the surface of the arc-shaped blade and then flows between the blade and the blade, and at the moment, the water can mix foam liquid on the surface of the blade together for rolling;

according to the invention, the cross section of the spoiler blade is in the shape of a circular arc and is matched with the blade aligned with the outlet of the water inlet pipe, so that the purpose that water can flow along the blade after impacting the blade is achieved, more water can flow between the blade and the blade, and then the water and sprayed foam liquid are uniformly mixed, the service life of the high-flow compressed air foam fire truck is further prolonged, and the use effect is further improved.

Preferably, a contact cavity is arranged between the water inlet pipe and the output pipe; the diameter of the contact cavity is larger than that of the water inlet pipe and the output pipe; the spoiler is fixed in the contact cavity through the rotating shaft; the specification of the spoiler is smaller than that of the contact cavity;

the during operation, the staff will contact the chamber and install between inlet tube and output tube, water advanced entering contact intracavity portion after coming out from the inlet tube this moment, foam liquid gets into contact the chamber through the hole for water spraying simultaneously, enlarge the contact mixing area of foam liquid and water, increase the specification of spoiler simultaneously, make can flow more water under the same rotation between blade and the blade, accelerate the stirring mixing rate of water and foam liquid, accelerate the speed that the foam produced, accelerate the efficiency of fire control fire extinguishing, the use that further increases a large-traffic compressed air foam fire engine is experienced and result of use.

Preferably, a second groove is formed in the inner wall, close to the rotating shaft, of the sleeve; balls are embedded in the second groove, and the second groove is rotationally connected with the balls;

when the vortex generator works, the balls are arranged between the vortex generator and the rotating shaft by a worker, sliding friction between the vortex generator and the rotating shaft is changed into rolling friction, so that friction force received by the vortex generator is reduced, the vortex generator can rotate more quickly after being impacted by water, loss of the vortex generator in the rotating process is reduced, and the service life of the vortex generator is prolonged.

Preferably, a first groove is formed in the spray head; the first groove penetrates through the inner wall of the spray head, the number of the first grooves is two, the first grooves are symmetrically arranged, and electromagnetic blocks are connected in the first grooves in a sliding mode; the cross section of the electromagnetic blocks is T-shaped, and the two electromagnetic blocks are magnetically attracted;

when the electromagnetic block is in work, the electromagnetic block is attracted under the action of magnetic force, so that the electromagnetic block can block the nozzle, and the nozzle is blocked under the condition that the fire engine is not used, so that dust and impurities cannot enter the nozzle, and the condition that the nozzle is blocked is avoided; when the staff need use the fire engine to put out a fire, the staff changes the inside current direction of one of them electromagnetism piece through the controller for the magnetic pole of this electromagnetism piece obtains changing, makes two electromagnetism piece magnetism repel each other, keeps away from each other, thereby makes the spout of shower nozzle open, and the T type avoids the electromagnetism piece to receive the repulsion force effect to break away from the shower nozzle simultaneously.

Preferably, the end face of the annular pipe communicated with the foam liquid conveying pipe is fixedly connected with a protective net;

when the foam fire fighting truck works, the tank is easy to rust due to high corrosivity of foam, a foam liquid conveying pipe is blocked, the foam liquid cannot be normally conveyed, and fire fighting rescue actions fail; the protection net can filter impurity and rust slag, prevents impurity and rust slag jam hole for water spraying to guarantee the normal transportation of foam liquid.

The invention has the following beneficial effects:

1. according to the invention, the spoiler is arranged at one end of the output pipe close to the water inlet pipe and the foam liquid conveying pipe, and is matched with the end face of the water inlet pipe close to the foam liquid conveying pipe in an inclined manner, so that the purpose that water can impact the surface of a blade of the spoiler to enable the spoiler to rotate is achieved, and further, the water and the foam liquid are stirred, so that the proportion of the water and the foam liquid is more uniform, the foam generated by the contact of the mixed liquid and the air is more uniform and stable, the use effect of the high-flow compressed air foam fire truck is improved, and the utilization rate of raw materials can also be improved.

2. According to the invention, the annular pipe is fixedly connected to the outer surface of the water inlet pipe close to the end face of the foam liquid conveying pipe, the annular pipe is communicated with the foam liquid conveying pipe, and the water spray holes are uniformly arranged on the end face of the annular pipe close to the spoiler to be matched with each other, so that the foam liquid can be sprayed into the output pipe through the water spray holes, the contact area between the foam liquid and water is increased, the foam liquid can be better mixed with the water, the mixing ratio of the foam liquid and the water is more uniform, the waste of raw materials is avoided, the use effect of the large-flow compressed air foam fire truck is further improved, and the utilization rate of the raw materials is further improved.

3. According to the invention, the cross section of the spoiler blade is in the shape of a circular arc and is matched with the blade aligned with the outlet of the water inlet pipe, so that the purpose that water can flow along the blade after impacting the blade is achieved, more water can flow between the blade and the blade, and then the water and sprayed foam liquid are uniformly mixed, the service life of the high-flow compressed air foam fire truck is further prolonged, and the use effect is further improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the inlet conduit, foam concentrate delivery conduit, contact chamber and outlet conduit arrangement of the present invention;

FIG. 3 is a cross-sectional view of the inlet conduit, foam concentrate delivery conduit, contact chamber and outlet conduit arrangement of the present invention;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 3;

FIG. 6 is a cross-sectional view of a sprinkler head according to the present invention;

in the figure: 1. a vehicle body; 2. a water inlet pipe; 3. a foam liquid conveying pipe; 21. an annular tube; 22. a water spray hole; 23. a protective net; 4. an output pipe; 5. a spray head; 51. a first groove; 52. an electromagnetic block; 6. a spoiler; 61. a rotating shaft; 62. a ball bearing; 63. a sleeve; 64. a blade; 65. a second groove; 7. contacting the cavity.

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 to 6, the technical solution adopted by the present invention to solve the technical problem is: the invention provides a large-flow compressed air foam fire fighting truck, which comprises a truck body 1, a water inlet pipe 2, a foam liquid conveying pipe 3, an output pipe 4, an air inlet pipe, a spray head 5 and a controller, wherein the truck body is provided with a water inlet pipe and a water outlet pipe; the diameter of the end surface of the water inlet pipe 2 close to the foam liquid conveying pipe 3 is reduced; one end of the output pipe 4 close to the water inlet pipe 2 and the foam liquid conveying pipe 3 is provided with a spoiler 6; the spoiler 6 comprises a blade 64, a sleeve 63 and a rotating shaft 61; the rotating shaft 61 is fixedly connected inside the output pipe 4, and the surface of the rotating shaft 61 is rotatably connected with a sleeve 63; the sleeve 63 is fixedly connected with the blade 64; the end surface of the water inlet pipe 2 close to the foam liquid conveying pipe 3 is obliquely arranged, and the outlet of the water inlet pipe 2 is aligned with the blades 64 of the spoiler 6;

when the device works, the foam concentrate and water cannot be fully stirred and mixed in the channel, so that the foam concentrate cannot effectively form foam or the generated foam is too little, the fire extinguishing effect is influenced, and meanwhile, the waste of raw materials is caused;

the staff starts the water pump through the controller, and the water is gushed from the water inlet pipe 2; then, the operator opens the foam liquid conveying pipe 3 through the controller, at the moment, foam liquid flows in from the foam liquid conveying pipe 3, water flows out of the water inlet pipe 2 and is mixed with the foam liquid, at the moment, the water impacts the surface of the blade 64 of the spoiler 6 to drive the spoiler 6 to rotate, the spoiler 6 is used for stirring the water and the foam liquid, so that the water and the foam liquid are mixed uniformly in proportion, then the mixed liquid flows out through the output pipe 4 and is contacted with air, and then foam is generated to be sprayed out of the spray nozzle 5 for extinguishing; and the inclined outlet of the water inlet pipe 2 enables water to directly impact the surface of the blade 64 of the spoiler 6 after flowing out of the water inlet pipe 2, rather than impacting the center of the spoiler 6, thus accelerating the rotation of the spoiler 6.

According to the invention, the spoiler 6 is arranged at one end of the output pipe 4 close to the water inlet pipe 2 and the foam liquid conveying pipe 3, and is matched with the end face of the water inlet pipe 2 close to the foam liquid conveying pipe 3 in an inclined manner, so that the purpose that water can impact the surface of the blades 64 of the spoiler 6 to rotate the spoiler 6 is achieved, the water and the foam liquid are stirred, the proportion of the water and the foam liquid is more uniform, the foam generated by the contact of the mixed liquid and the air is more uniform and stable, the use effect of the high-flow compressed air foam fire truck is improved, and the utilization rate of raw materials can also be improved.

As an embodiment of the invention, the outer surface of the water inlet pipe 2 close to the end surface of the foam liquid conveying pipe 3 is fixedly connected with an annular pipe 21; the section of the annular pipe 21 is trapezoidal, and the annular pipe 21 is communicated with the foam liquid conveying pipe 3; the end surface of the annular pipe 21 close to the spoiler 6 is uniformly provided with water spray holes 22; the water spray holes 22 are communicated with the interior of the annular pipe 21;

when the device works, a worker controls the foam liquid conveying pipe 3 to be opened through the controller, foam liquid enters the annular pipe 21 through the foam liquid conveying pipe 3, then the foam liquid is uniformly sprayed out of the annular pipe 21 through the water spraying holes 22 arranged on the end face of the annular pipe 21, and the foam liquid is sprayed into the output pipe 4; meanwhile, the annular pipe 21 is matched with the water spray hole 22, so that water cannot enter the foam concentrate conveying pipe 3, the water cannot be mixed with foam liquid which is not needed, the condition that the foam concentrate cannot be stored for a long time is avoided, and pollution and waste of raw materials are avoided;

according to the invention, the annular pipe 21 is fixedly connected to the outer surface of the water inlet pipe 2 close to the end face of the foam liquid conveying pipe 3, the annular pipe 21 is communicated with the foam liquid conveying pipe 3, and the annular pipe 21 is uniformly provided with the water spray holes 22 to be matched with the end face of the annular pipe 21 close to the spoiler 6, so that the foam liquid can be sprayed into the output pipe 4 through the water spray holes 22, the contact area of the foam liquid and water is further increased, the foam liquid can be better mixed with the water, the mixing proportion of the foam liquid and the water is more uniform, the waste of raw materials is avoided, the use effect of the high-flow compressed air foam fire truck is further improved, and the utilization rate of the raw materials is further improved.

In one embodiment of the present invention, the cross-sectional shape of the blade 64 is a circular arc;

when the water-saving device works, water is conveyed through the water inlet pipe 2 and then impacts the surface of the blade 64, the cross section of the blade 64 is arc-shaped, so that on one hand, the blade 64 can bear larger impact force and prolong the service life of the blade 64, on the other hand, the water can flow along the arc-shaped plate after impacting the surface of the arc-shaped blade 64 and then flows between the blade 64 and the blade 64, and at the moment, the water can mix foam liquid on the surface of the blade 64 together for rolling;

according to the invention, the cross section of the blade 64 of the spoiler 6 is in the shape of a circular arc and is matched with the blade 64 aligned with the outlet of the water inlet pipe 2, so that the purpose that water can flow along the blade 64 after impacting the blade 64 is achieved, more water can flow between the blade 64 and then is uniformly mixed with sprayed foam liquid, the service life of the high-flow compressed air foam fire truck is further prolonged, and the use effect can be further improved.

As an embodiment of the present invention, a contact chamber 7 is arranged between the inlet pipe 2 and the outlet pipe 4; the diameter of the contact cavity 7 is larger than that of the water inlet pipe 2 and the output pipe 4; the spoiler 6 is fixed inside the contact cavity 7 through a rotating shaft 61; the specification of the spoiler 6 is smaller than that of the contact cavity 7;

the during operation, the staff will contact chamber 7 and install between inlet tube 2 and output tube 4, water advanced entering after coming out from inlet tube 2 this moment contacts the intracavity 7 inside, foam concentrate passes through the hole for water spraying 22 simultaneously and gets into contact chamber 7, enlarge the contact mixing area of foam concentrate and water, increase spoiler 6's specification simultaneously, make can flow more water under the same rotation between blade 64 and the blade 64, accelerate the stirring mixing velocity of water and foam concentrate, accelerate the speed that the foam produced, accelerate the efficiency that the fire control was put out a fire, further increase the use experience and the result of use of a large-traffic compressed air foam fire engine.

As an embodiment of the present invention, a second groove 65 is disposed on an inner wall of the sleeve 63 close to the rotating shaft 61; the ball 62 is embedded in the second groove 65, and the second groove 65 is rotationally connected with the ball 62;

when the vortex generator works, the balls 62 are arranged between the vortex generator 6 and the rotating shaft 61 by a worker, sliding friction between the vortex generator 6 and the rotating shaft 61 is changed into rolling friction, so that friction force received by the vortex generator 6 is reduced, the vortex generator 6 can rotate faster after being impacted by water, loss of the vortex generator 6 in the rotating process is reduced, and the service life of the vortex generator 6 is prolonged.

As an embodiment of the present invention, a first groove 51 is arranged inside the spray head 5; the first grooves 51 penetrate through the inner wall of the spray head 5, the number of the first grooves 51 is two, the first grooves 51 are symmetrically arranged, and the electromagnetic blocks 52 are connected inside the first grooves 51 in a sliding mode; the cross section of the electromagnetic blocks 52 is T-shaped, and the two electromagnetic blocks 52 are magnetically attracted;

when the electromagnetic block 52 works, the electromagnetic block 52 is attracted under the action of magnetic force, so that the nozzle 5 can be blocked by the electromagnetic block 52, and the nozzle is blocked when the fire engine is not used, so that dust and impurities cannot enter the nozzle, and the nozzle is prevented from being blocked; when the staff need use the fire engine to put out a fire, the staff changes the inside current direction of one of them electromagnetism piece 52 through the controller for this electromagnetism piece 52's magnetic pole obtains changing, makes two electromagnetism pieces 52 magnetism repel each other, keeps away from each other, thereby makes the spout of shower nozzle 5 open, and the T type avoids electromagnetism piece 52 to receive the repulsion effect to break away from shower nozzle 5 simultaneously.

As an embodiment of the invention, the end face of the annular pipe 21 communicated with the foam concentrate conveying pipe 3 is fixedly connected with a protective net 23;

when the fire fighting truck works, the tank of the foam fire fighting truck is easy to rust due to high corrosivity of foam, the foam liquid conveying pipe 3 is blocked, the foam liquid cannot be normally conveyed, and the fire fighting rescue action fails; the protective net 23 can filter impurities and rust slag and prevent the impurities and the rust slag from blocking the water spraying holes 22, so that the normal conveying of the foam liquid is guaranteed.

The specific working process is as follows:

the staff starts the water pump through the controller, and the water is gushed from the water inlet pipe 2; then, the operator opens the foam liquid conveying pipe 3 through the controller, at the moment, foam liquid flows in from the foam liquid conveying pipe 3, water flows out of the water inlet pipe 2 and is mixed with the foam liquid, at the moment, the water impacts the surface of the blade 64 of the spoiler 6 to drive the spoiler 6 to rotate, the spoiler 6 is used for stirring the water and the foam liquid, so that the water and the foam liquid are mixed uniformly in proportion, then the mixed liquid flows out through the output pipe 4 and is contacted with air, and then foam is generated to be sprayed out of the spray nozzle 5 for extinguishing; the inclined outlet of the water inlet pipe 2 enables water to directly impact the surface of the blade 64 of the spoiler 6 after flowing out of the water inlet pipe 2, rather than impacting the center of the spoiler 6, so that the rotation of the spoiler 6 can be accelerated; a worker controls the foam liquid conveying pipe 3 to be opened through the controller, foam liquid enters the annular pipe 21 through the foam liquid conveying pipe 3, then the foam liquid is uniformly sprayed out of the annular pipe 21 through the water spraying holes 22 arranged on the end face of the annular pipe 21, and the foam liquid is sprayed into the output pipe 4; meanwhile, the annular pipe 21 is matched with the water spray hole 22, so that water cannot enter the foam concentrate conveying pipe 3, the water cannot be mixed with foam liquid which is not needed, the condition that the foam concentrate cannot be stored for a long time is avoided, and pollution and waste of raw materials are avoided; the water is conveyed through the water inlet pipe 2 and then impacts the surfaces of the blades 64, the cross sections of the blades 64 are arc-shaped, so that the blades 64 can bear larger impact force and prolong the service life of the blades 64 on the one hand, and on the other hand, the water can flow along the arc-shaped plate after impacting the surfaces of the arc-shaped blades 64 and then flow between the blades 64 and the blades 64, and at the moment, the water can mix foam liquid on the surfaces of the blades 64 together for rolling; the contact cavity 7 is arranged between the water inlet pipe 2 and the output pipe 4 by a worker, at the moment, water enters the contact cavity 7 after coming out of the water inlet pipe 2, and foam concentrate enters the contact cavity 7 through the water spray holes 22, so that the contact mixing area of the foam concentrate and the water is enlarged, the specification of the spoiler 6 is increased, more water can flow between the blades 64 and the blades 64 under the same rotation, the stirring and mixing speed of the water and the foam concentrate is increased, the foam generation speed is increased, and the fire extinguishing efficiency is increased; the working personnel are provided with the balls 62 between the spoiler 6 and the rotating shaft 61, so that the sliding friction between the spoiler 6 and the rotating shaft 61 is changed into rolling friction, the friction force received by the spoiler 6 is reduced, the spoiler 6 can rotate faster after being impacted by water, and the loss of the spoiler 6 in the rotating process is reduced; the electromagnetic block 52 is attracted under the action of magnetic force, so that the electromagnetic block 52 can block the nozzle 5, and the nozzle is blocked when the fire engine is not used, so that dust and impurities cannot enter the nozzle, and the nozzle is prevented from being blocked; when a worker needs to use the fire fighting truck to extinguish a fire, the worker changes the current direction in one of the electromagnetic blocks 52 through the controller, so that the magnetic poles of the electromagnetic blocks 52 are changed, the two electromagnetic blocks 52 repel each other magnetically and are far away from each other, the nozzle of the spray head 5 is opened, and meanwhile the T-shaped electromagnetic blocks 52 are prevented from being separated from the spray head 5 under the action of repulsive force; the tank of the foam fire truck is easy to rust due to the high corrosivity of foam, and can cause blockage of a foam liquid conveying pipe 3, incapability of normally conveying foam liquid and failure of fire-fighting rescue actions; the protection net 23 can filter impurities as well as rust.

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.