CN109821168B - Variable-flow foam mixing and supplying system and fire fighting truck - Google Patents
Variable-flow foam mixing and supplying system and fire fighting truck Download PDFInfo
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- CN109821168B CN109821168B CN201910169446.XA CN201910169446A CN109821168B CN 109821168 B CN109821168 B CN 109821168B CN 201910169446 A CN201910169446 A CN 201910169446A CN 109821168 B CN109821168 B CN 109821168B
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Abstract
The invention belongs to the field of fire fighting and extinguishment, and particularly relates to a variable-flow foam mixing and supplying system and a fire truck, which comprise a frame body, an isolation plate, a mixing and stirring mechanism, a centrifugal mechanism, a power transmission mechanism and a flow adjusting mechanism; a liquid inlet pipe is fixedly arranged in the right end wall of the frame body, and a mixing and stirring mechanism is arranged at the right end in the frame body; the stirring rod is inserted and rotatably arranged in the frame body, the left side of the stirring rod is rotatably inserted and connected to the middle part of the isolation plate, and the right end of the stirring rod is rotatably connected to the motor; the power transmission mechanism is arranged on the left side of the isolation plate; a centrifugal mechanism is arranged on the left side of the power transmission mechanism; the conveying groove is formed in the inner part of the left end of the stirring rod; the lower end of the liquid outlet pipe is fixedly connected with a flow regulating mechanism through a flange plate; the invention is mainly used for solving the problems that the existing foam fire extinguishing system can not control the amount of the sprayed foam, can not control the spraying distance to cause waste and cause environmental pollution.
Description
Technical Field
The invention belongs to the field of fire fighting, and particularly relates to a variable-flow foam mixing supply system and a fire fighting truck.
Background
The foam fire extinguishing principle is that a great amount of carbon dioxide and foam can be sprayed out when fire is extinguished, and the carbon dioxide and the foam can be adhered to combustible materials to isolate the combustible materials from air, so that the purpose of extinguishing fire is achieved.
Fire trucks, also known as fire trucks, refer to special vehicles that are used primarily to perform fire-fighting tasks, and most national fire departments, including china, also use them for other emergency rescue purposes. The fire engine can transport the fire fighter and arrive at the disaster scene to for it carries out the task of rescuing and provides multiple instrument, modern fire engine can be equipped with large-scale fire extinguishing apparatus such as water tank, water pump, foam extinguishing device usually, take foam extinguishing apparatus, the foam extinguishing apparatus that fire engine was equipped with among the prior art does not possess control function usually, all adopt the principle the same with the fire hydrant, no matter the intensity of a fire, many long distances, it is rescue all to be same kind of fire engine usually, lead to large-scale intensity of a fire to put out slowly very easily, a large amount of foams are wasted to small-size intensity of a fire, cause a series of problems of pollution to the environment.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a variable-flow foam mixing and supplying system and a fire fighting truck. The invention is mainly used for solving the problems that the existing foam fire extinguishing system can not control the amount of the sprayed foam, can not control the spraying distance to cause waste and cause environmental pollution.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a variable-flow foam mixing and supplying system which comprises a frame body, an isolating plate, a mixing and stirring mechanism, a centrifugal mechanism, a power transmission mechanism and a flow regulating mechanism, wherein the frame body is provided with a plurality of partition plates; the frame body is cylindrical, a liquid inlet pipe is fixedly arranged in the right end wall of the frame body, and a mixing and stirring mechanism is arranged at the right end in the frame body; the mixing and stirring mechanism consists of a stirring rod, a stirring block and a motor; the stirring rod is inserted and rotatably installed inside the frame body, the left side of the stirring rod is rotatably inserted and connected to the middle part of the partition plate, the right end of the stirring rod is rotatably connected to the motor, and stirring blocks are uniformly and symmetrically and fixedly installed on the outer surface of the stirring rod; the motor is arranged on the right side of the outer part of the frame body; the isolation plate is disc-shaped, is fixedly arranged on the inner wall of the left end of the frame body, and is provided with a power transmission mechanism on the left side; a centrifugal mechanism is arranged on the left side of the power transmission mechanism; the centrifugal mechanism is arranged at the left end of the interior of the frame body and consists of a centrifugal disc, a guide plate, an inner gear ring, a conveying groove and a conveying rail; the conveying groove is formed in the inner part of the left end of the stirring rod; the middle part of the centrifugal disc is rotatably connected to the outer surface of the left end of the stirring rod through a bearing, a guide plate is uniformly arranged on the left end wall of the centrifugal disc, and an inner gear ring is fixedly connected to the right end wall of the centrifugal disc; a conveying rail is arranged on the left side of the guide plate; the left end of the conveying rail is fixedly connected to the inner wall of the frame body, the conveying rail is mainly used for drawing the mixed foam liquid to a fixed position, and a liquid outlet pipe is arranged on the lower side of the conveying rail; the liquid outlet pipe is fixedly arranged in the lower wall of the left end of the frame body, and the lower end of the liquid outlet pipe is fixedly connected with a flow regulating mechanism through a flange plate; when water and foam liquid enter the mixing and stirring mechanism through the liquid inlet pipe, the motor is started to enable the stirring rod to rotate, the stirring rod rotates, namely the stirring block rotates, the water and the foam liquid can be fully mixed, and the mixed foam liquid enters the left end of the frame body and is conveyed to the outside of the structure through the liquid outlet pipe through the centrifugal mechanism.
The power transmission mechanism is arranged in the left end of the frame body and consists of a first friction wheel, a second friction wheel, a first rotating shaft, a spherical gear mechanism, a fixing plate, a shock absorber, a sliding block, an electric hydraulic rod, a protective frame, a sliding chute, a connecting telescopic rod, a second rotating shaft and a straight gear; the first friction wheel is fixedly arranged on the outer surface of the left end of the stirring rod, and the outer surface of the first friction wheel is in friction rotation connection with a second friction wheel; the second friction wheel is rotatably arranged on the fixed plate through a first rotating shaft; the upper surface of the fixed plate is fixedly provided with a shock absorber; the upper end of the shock absorber is fixedly arranged on the lower surfaces of the two ends of the sliding block; the upper end of the sliding block is slidably arranged in a sliding groove in the wall of the protective frame, and the right surface of the lower end of the sliding block is fixedly provided with an electric hydraulic rod; the right end of the electric hydraulic rod is fixedly arranged on the left side wall of the isolation plate; the right end of the protective frame is fixedly connected to the left side wall of the isolation plate; the left end of the first rotating shaft is rotatably connected with a connecting telescopic rod through a ball gear mechanism; the connecting telescopic rod has torsion, and the left end of the connecting telescopic rod is rotatably connected with a second rotating shaft through a ball gear mechanism; the second rotating shaft is rotatably arranged in the left end wall of the protective frame, and a straight gear is fixedly arranged on the outer surface of the left end of the second rotating shaft; the straight gear is rotationally connected to an inner gear ring of the centrifugal mechanism; when the stirring rod rotates, the first friction wheel is driven to rotate, the first friction wheel enables the second friction wheel to rotate through the friction action, namely the first rotating shaft rotates, the first rotating shaft is connected with the second rotating shaft through a ball gear and a telescopic rod, so the second rotating shaft and the first rotating shaft do relative rotation motion, the second rotating shaft drives an inner gear ring to rotate through a straight gear at the left end, the inner gear ring is fixedly connected to a centrifugal disc, namely the centrifugal disc and the stirring rod rotate in opposite directions, if the rotating speed of the centrifugal disc needs to be adjusted, an electric hydraulic rod can be started, a sliding block is moved leftwards and rightwards to increase or reduce the contact area of the second friction wheel and the first friction wheel, the rotating speed of the centrifugal disc can be adjusted, when the rotating speed of the centrifugal disc is higher than that of the stirring rod, a centrifugal mechanism area at the left end of a frame body is in a negative pressure state, namely, suction force is generated in a conveying groove, foam liquid fully mixed in a mixing and stirring mechanism is sucked to the centrifugal mechanism area, and then the foam liquid is conveyed to the conveying rail by the guide plate on the centrifugal disc through the fixed rail and flows to the liquid outlet pipe through rotation, the higher the rotating speed of the centrifugal disc is, the stronger the suction force is, the faster the foam liquid is conveyed, so that the conveying amount of the foam liquid can be controlled by adjusting the rotating speed of the centrifugal disc through the fire intensity, the waste of a large amount of foam liquid in the fire fighting process is avoided, and the environment is not protected.
The flow regulating mechanism consists of a mounting ring, a mounting pipe and a flow changing pipe; the mounting ring is arranged below the liquid outlet pipe, the lower surface of the left end of the mounting ring is fixedly arranged at the upper end of the mounting pipe, and the lower surface of the right end of the mounting ring is fixedly welded with a variable flow pipe; because the variable flow pipe is of a trapezoidal structure with a large upper opening and a small lower opening, when foam liquid flows into the flow regulating mechanism through the liquid outlet pipe, the throughput of the foam liquid is reduced, and the foam liquid in the liquid outlet pipe has larger pressure as the centrifugal mechanism continuously conveys the foam liquid, so that the foam liquid with stronger pressure can be accelerated when passing through the variable flow pipe, the impact force of the finally sprayed foam liquid is large, namely the sprayed foam liquid can be sprayed to a farther position, and the situations that a large amount of foam liquid is wasted due to insufficient spraying distance and the fire fighting is not timely are avoided.
The wall thickness of the upper end wall of the converter tube is thicker than that of the lower end wall of the converter tube, and an air hole is formed below the converter tube; the air holes are uniformly formed in the wall of the mounting pipe; because the variable flow tube is welded on the mounting ring, if the wall thicknesses of the upper end and the lower end of the variable flow tube are kept consistent, the variable flow tube can be subjected to great pressure along with the increase of rescue time, and the variable flow tube is easy to separate from the mounting ring.
The variable flow pipe consists of a plurality of helical blades, and the lower end of the variable flow pipe is provided with a helical groove; when the foam liquid passes through the variable flow pipe, the variable flow pipe is composed of a plurality of spiral blades, so that a spiral groove is formed on the inner wall of the lower end of the variable flow pipe, the spiral groove is enabled to give a rotating force to the sprayed foam liquid, the foam liquid can be sprayed out in a rotating mode, the third acceleration is formed on the foam liquid, the spraying distance of the foam liquid is maximized, the best fire extinguishing efficiency can be obtained, meanwhile, a large amount of fire extinguishing time is saved, property loss is reduced, and meanwhile, the secondary mixing of the foam liquid is facilitated.
The outer surface of the spiral blade is fixedly connected with a cylinder; the upper end of the cylinder is fixedly connected to the inner wall of the mounting pipe; when the foam liquid passes through the variable flow pipe, a large amount of noise is generated due to the change of the ejection speed, once the variable flow pipe is damaged, the working efficiency is greatly reduced, and therefore the air cylinder can be operated to increase or reduce the caliber of the lower end of the variable flow pipe, the ejection quantity and the ejection speed of the foam liquid can be changed to form various ejection speeds and ejection quantities, the fire control of a small fire scene is facilitated, meanwhile, the variable flow pipe can be further fixed, so that the variable flow pipe is more stable and firm in the working process, and the noise problem of the variable flow pipe during working can be effectively reduced.
A foam fire fighting truck using the variable flow foam supply system described in the above specification.
The invention has the following beneficial effects:
1. according to the invention, by arranging the power transmission mechanism, the centrifugal mechanism and the flow regulating mechanism, the rotating speed of the centrifugal disc is controlled, so that the spraying amount of the foam liquid can be flexibly controlled, a large amount of foam liquid can be saved by effectively regulating the fire intensity, waste is avoided, and environmental pollution can be prevented.
2. The variable flow pipe is arranged to be matched with the centrifugal mechanism, so that the spraying distance can be accurately controlled, different spraying ranges are adopted according to different fire behaviors, the fire behavior is quickly extinguished, and property loss is greatly reduced.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic diagram of the construction of the inverter tube of FIG. 1 according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 in accordance with the present invention;
FIG. 4 is an enlarged view of a portion B of FIG. 1 in accordance with the present invention;
FIG. 5 is a schematic illustration of the front side of the centrifugal plate of FIG. 1 according to the present invention;
FIG. 6 is a schematic diagram of the back side of the centrifugal plate of FIG. 1 according to the present invention;
in the figure: the device comprises a frame body 1, an isolation plate 2, a mixing and stirring mechanism 3, a stirring rod 31, a stirring block 32, a motor 33, a centrifugal mechanism 4, a centrifugal disc 41, a guide plate 42, an internal gear ring 43, a conveying groove 44, a conveying rail 45, a power transmission mechanism 5, a first friction wheel 501, a second friction wheel 502, a first rotating shaft 503, a ball gear mechanism 504, a fixing plate 505, a shock absorber 506, a sliding block 507, an electric hydraulic rod 508, a protective frame 509, a sliding groove 510, a connecting telescopic rod 511, a second rotating shaft 512, a straight gear 513, a flow adjusting mechanism 6, an installation ring 61, an installation pipe 62, a variable flow pipe 63, a spiral blade 63a, a spiral groove 63b, an air cylinder 63c, a liquid inlet pipe 7 and a liquid outlet pipe 8.
Detailed Description
A variable-flow foam mixing and supplying system and a fire fighting truck according to an embodiment of the present invention will be described below with reference to fig. 1 to 6.
As shown in fig. 1-6, the variable flow foam mixing and supplying system according to the present invention comprises a frame 1, a partition plate 2, a mixing and stirring mechanism 3, a centrifugal mechanism 4, a power transmission mechanism 5 and a flow regulating mechanism 6; the frame body 1 is cylindrical, a liquid inlet pipe 7 is fixedly arranged in the right end wall of the frame body 1, and a mixing and stirring mechanism 3 is arranged at the right end in the frame body 1; the mixing and stirring mechanism 3 consists of a stirring rod 31, a stirring block 32 and a motor 33; the stirring rod 31 is inserted and rotatably installed inside the frame body 1, the left side of the stirring rod 31 is rotatably inserted and connected to the middle part of the partition plate 2, the right end of the stirring rod 31 is rotatably connected to the motor 33, and stirring blocks 32 are uniformly and symmetrically and fixedly installed on the outer surface of the stirring rod 31; the motor 33 is arranged at the right side of the outer part of the frame body 1; the isolation plate 2 is disc-shaped, the isolation plate 2 is fixedly arranged on the inner wall of the left end of the frame body 1, and the power transmission mechanism 5 is arranged on the left side of the isolation plate 2; a centrifugal mechanism 4 is arranged on the left side of the power transmission mechanism 5; the centrifugal mechanism 4 is arranged at the left end of the interior of the frame body 1, and the centrifugal mechanism 4 consists of a centrifugal disc 41, a guide plate 42, an inner gear ring 43, a conveying groove 44 and a conveying rail 45; the conveying groove 44 is formed in the inner portion of the left end of the stirring rod 31; the middle part of the centrifugal disc 41 is rotatably connected to the outer surface of the left end of the stirring rod 31 through a bearing, a guide plate 42 is uniformly arranged on the left end wall of the centrifugal disc 41, and an inner gear ring 43 is fixedly connected to the right end wall of the centrifugal disc 41; a conveying rail 45 is arranged on the left side of the guide plate 42; the left end of the conveying rail 45 is fixedly connected to the inner wall of the frame body 1, the conveying rail 45 is mainly used for drawing the mixed foam liquid to a fixed position, and a liquid outlet pipe 8 is arranged on the lower side of the conveying rail 45; the liquid outlet pipe 8 is fixedly arranged in the lower wall of the left end of the frame body 1, and the lower end of the liquid outlet pipe 8 is fixedly connected with a flow regulating mechanism 6 through a flange plate; when water and foam liquid enter the mixing and stirring mechanism 3 through the liquid inlet pipe 7, the motor 33 is started to rotate the stirring rod 31, the stirring rod 31 rotates, namely the stirring block 32 rotates, so that the water and the foam liquid can be fully mixed, the mixed foam liquid enters the left end of the frame body 1 and is conveyed to the outside of the structure through the liquid outlet pipe 8 through the centrifugal mechanism 4, the mixing and stirring mechanism 3 and the centrifugal mechanism 4 are communicated, so that the motor 33 can be driven to work together while running normally, the energy consumption is undoubtedly greatly reduced compared with the existing separation type working mode, the whole energy consumption of the fire fighting truck is reduced, the long-time working state can be kept in a rescue site, the rescue efficiency is improved, and meanwhile, because the centrifugal mechanism 4 of the invention is arranged at the left end of the mixing and stirring mechanism 3 and works simultaneously, the mixed foam liquid can be pumped out through the centrifugal mechanism 4, when the foam liquid passes through the conveying groove 44, the foam liquid is in a spray shape when entering the centrifugal mechanism 4 through the conveying groove 44 due to the thin pipeline, the extracted foam liquid is uniformly scattered on the conveying rail 45 through the guide plate 42, the foam liquid can be sufficiently mixed again, and the body of the motor 33 is constantly kept in a high-temperature state due to the long-time high rotating speed, so that the operation is very unfavorable.
The power transmission mechanism 5 is arranged in the left end of the frame body 1, and the power transmission mechanism 5 consists of a first friction wheel 501, a second friction wheel 502, a first rotating shaft 503, a ball gear mechanism 504, a fixing plate 505, a shock absorber 506, a sliding block 507, an electric hydraulic rod 508, a protective frame 509, a sliding groove 510, a connecting telescopic rod 511, a second rotating shaft 512 and a straight gear 513; the first friction wheel 501 is fixedly arranged on the outer surface of the left end of the stirring rod 31, and a second friction wheel 502 is connected to the outer surface of the first friction wheel 501 in a friction rotation mode; the second friction wheel 502 is rotatably mounted on the fixing plate 505 through a first rotating shaft 503; a shock absorber 506 is fixedly arranged on the upper surface of the fixing plate 505; the upper ends of the shock absorbers 506 are fixedly arranged on the lower surfaces of the two ends of the sliding block 507; the upper end of the sliding block 507 is slidably arranged in a sliding groove 510 in the wall of the protective frame 509, and the right surface of the lower end of the sliding block 507 is fixedly provided with an electric hydraulic rod 508; the right end of the electric hydraulic rod 508 is fixedly arranged on the left side wall of the isolation plate 2; the protective frame 509 is in a cuboid shape, and the right end of the protective frame 509 is fixedly connected to the left side wall of the isolation plate 2; the left end of the first rotating shaft 503 is rotatably connected with a connecting telescopic rod 511 through a ball gear mechanism 504; the connecting telescopic rod 511 has torque, and the left end of the connecting telescopic rod 511 is rotatably connected with a second rotating shaft 512 through a ball gear mechanism 504; the second rotating shaft 512 is rotatably installed in the left end wall of the protective frame 509, and a spur gear 513 is fixedly installed on the outer surface of the left end of the second rotating shaft 512; the straight gear 513 is rotationally connected to the inner gear ring 43 of the centrifugal mechanism 4; when the stirring rod 31 rotates, the first friction wheel 501 is driven to rotate, the first friction wheel 501 rotates the second friction wheel 502 through friction action, i.e. the first rotating shaft 503 rotates, because the first rotating shaft 503 is connected with the second rotating shaft 512 through a ball gear and a telescopic rod, the second rotating shaft 512 and the first rotating shaft 503 do relative rotation motion, the second rotating shaft 512 drives the inner gear ring 43 to rotate through a straight gear 513 at the left end, because the inner gear ring 43 is fixedly connected to the centrifugal disk 41, i.e. the centrifugal disk 41 and the stirring rod 31 rotate in opposite directions, if the rotation speed of the centrifugal disk 41 needs to be adjusted, the electric hydraulic rod 508 can be started, the sliding block 507 moves left and right to increase or decrease the contact area of the second friction wheel 502 and the first friction wheel 501, i.e. the rotation speed of the centrifugal disk 41 can be adjusted, when the rotation speed of the centrifugal disk 41 is higher than that of the stirring rod 31, the centrifugal mechanism 4 area at the left end of the frame body 1 is, suction is generated in the conveying groove 44, foam concentrate fully mixed in the mixing and stirring mechanism 3 is sucked to the area of the centrifugal mechanism 4 through the through holes in the conveying groove 44, and then is conveyed to the conveying rail 45 through the guide plate 42 on the centrifugal disc 41 by the fixed rail and flows to the liquid outlet pipe 8 through rotation, the suction force is stronger when the rotation speed of the centrifugal disc 41 is faster, so that the conveying amount of the foam concentrate can be controlled by adjusting the rotation speed of the centrifugal disc 41 according to the fire intensity, the waste of a large amount of foam concentrate in the fire fighting process is avoided, and the environment is not protected.
The flow regulating mechanism 6 consists of a mounting ring 61, a mounting pipe 62 and a variable flow pipe 63; the mounting ring 61 is arranged below the liquid outlet pipe 8, the lower surface of the left end of the mounting ring 61 is fixedly mounted at the upper end of the mounting pipe 62, and the lower surface of the right end of the mounting ring 61 is fixedly welded with a variable flow pipe 63; an air hole 64 is formed below the flow changing pipe 63; the air holes 64 are uniformly formed in the wall of the mounting pipe 62; because the variable flow pipe 63 is set to be a trapezoid structure with a large upper opening and a small lower opening, when foam liquid flows into the flow regulating mechanism 6 through the liquid outlet pipe 8, the throughput of the foam liquid is reduced, and the foam liquid pressure in the liquid outlet pipe 8 is increased due to the continuous foam liquid conveying of the centrifugal mechanism 4, so that the foam liquid under strong pressure is accelerated when passing through the variable flow pipe 63, the impact force of the foam liquid which is finally sprayed is large, the foam liquid is accelerated when passing through the variable flow pipe 63, a negative pressure area is formed in a cavity outside the variable flow pipe 63, air holes 64 are formed in the mounting pipe 62, so that the foam liquid can be sucked from the outside of the mounting pipe 62, the foam liquid is accelerated secondarily and mixed secondarily when spraying out the variable flow pipe 63, the spraying range of the foam liquid is further expanded to form a better fire extinguishing effect, namely, the sprayed foam liquid can be sprayed to a farther position, the situations that a large amount of foam liquid is wasted due to insufficient spraying distance and fire fighting is not timely and harmonious are avoided.
The wall thickness of the upper end wall of the variable flow pipe 63 is larger than that of the lower end wall; because the variable flow pipe 63 is welded on the mounting ring 61, if the wall thickness of the upper end and the lower end of the variable flow pipe 63 is kept consistent, the variable flow pipe 63 can be subjected to great pressure along with the increase of rescue time, and the variable flow pipe 63 is easy to separate from the mounting ring 61, the invention can keep stable effect when being subjected to great pressure by arranging the variable flow pipe 63 into an upper wall and then a lower wall, so that the stability of the variable flow pipe 63 in work is enhanced, meanwhile, if the variable flow pipe 63 is subjected to great impact force for a long time, other parts connected with the variable flow pipe 63 can also be subjected to great impact force, so that the structural main body is easy to crack due to the connecting effect in the operation process, once the device main body is cracked in the rescue site, the fire extinguishing efficiency is greatly influenced, more property loss is caused, and the impact force applied to the variable flow pipe 63 can be greatly reduced by arranging the variable flow pipe 63 into a shape with the thin upper wall thickness and, which helps stabilize the normal operation of the other components connected to the deflector tube 63.
The variable flow pipe 63 consists of a plurality of helical blades 63a, and the lower end of the variable flow pipe 63 is provided with a helical groove 63 b; when the foam liquid passes through the variable flow pipe 63, the variable flow pipe 63 consists of a plurality of spiral blades 63a, so that a spiral groove 63b is formed on the inner wall of the lower end of the variable flow pipe, the sprayed foam liquid is endowed with a rotating force, the foam liquid can be sprayed out in a rotating manner, the foam liquid is accelerated for the third time, the spraying distance of the foam liquid is maximized, the best fire extinguishing efficiency can be obtained, meanwhile, a large amount of fire extinguishing time is saved, property loss is reduced, and the secondary mixing of the foam liquid is facilitated.
The outer surface of the helical blade 63a is fixedly connected with a cylinder 63 c; the upper end of the cylinder 63c is fixedly connected to the inner wall of the mounting pipe 62; when the foam liquid passes through the variable flow pipe 63, the force of spraying the foam liquid on the lower end of the variable flow pipe 63 is larger and larger along with the increase of the spraying speed, and because the lower wall of the variable flow pipe 63 is thinner, the invention can generate a great deal of noise when facing a larger impact force, so that a rescue site can be filled with a great deal of noise, which is very unfavorable for the rescue action, the invention fixes the lower end of the converter tube 63 by installing the cylinder 63c on the outer wall of the converter tube 63, the noise problem of the variable flow tube 63 during operation can be effectively reduced, so that the variable flow tube 63 is more stable and firmer during operation, and, once the variable flow tube 63 is damaged, the working efficiency is greatly reduced, whereby the cylinder 63c can be operated to increase or decrease the size of the bore of the lower end of the variable flow tube 63, namely, the discharge rate and discharge speed of the foam liquid can be changed to form various discharge rates and discharge rates, which is beneficial to fire control in small fire scenes.
The foam fire fighting truck provided by the invention uses the variable flow foam mixing system in the above embodiment.
The specific working process is as follows:
when the centrifugal liquid mixing and stirring device works, when water and foam liquid enter the mixing and stirring mechanism 3 through the liquid inlet pipe 7, the motor 33 is started to rotate the stirring rod 31, the stirring rod 31 rotates, that is, the stirring block 32 rotates, so that the water and the foam liquid can be fully mixed, when the stirring rod 31 rotates, the first friction wheel 501 is driven to rotate, the first friction wheel 501 rotates the second friction wheel 502 through the friction action, that is, the first rotating shaft 503 rotates, because the first rotating shaft 503 is connected with the second rotating shaft 512 through a ball gear and a telescopic rod, the second rotating shaft 512 rotates relative to the first rotating shaft 503, the second rotating shaft 512 drives the inner gear ring 43 to rotate through a spur gear 513 at the left end, because the inner gear ring 43 is fixedly connected to the centrifugal disc 41, that is, the inner gear 41 rotates in the opposite direction to the stirring rod 31, if the rotating speed of the centrifugal disc 41 needs to be adjusted, the electric hydraulic rod 508 can be started, so that the sliding block 507 moves left and right to increase or reduce the contact area between the second friction wheel 502, namely, the rotation speed of the centrifugal disc 41 can be adjusted, when the rotation speed of the centrifugal disc 41 is higher than that of the stirring rod 31, the area of the centrifugal mechanism 4 at the left end of the frame 1 is in a negative pressure state, that is, suction is generated in the conveying groove 44, foam concentrate fully mixed in the mixing stirring mechanism 3 is sucked to the area of the centrifugal mechanism 4 through the through hole on the conveying groove 44, and then is conveyed to the conveying rail 45 through the guide plate 42 on the centrifugal disc 41 by the fixed rail and flows to the liquid outlet pipe 8 through rotation, and the suction is stronger as the rotation speed of the centrifugal disc 41 is faster, the foam concentrate is conveyed more rapidly, because the flow change pipe 63 is set to be a trapezoid structure with a large upper opening and a small lower opening, when the foam concentrate flows into the flow regulating mechanism 6 through the liquid outlet pipe 8, the throughput of the foam concentrate is reduced, and because the centrifugal mechanism 4 continuously conveys the foam concentrate, the foam concentrate in the liquid outlet pipe 8 is higher and higher in pressure, therefore, the foam liquid under a strong pressure is accelerated when passing through the variable flow pipe 63, so that the impact force of the foam liquid finally discharged is large, that is, the discharged foam liquid can be discharged to a further position.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A variable flow foam mixing and supplying system comprises a frame body (1), an isolation plate (2), a mixing and stirring mechanism (3), a centrifugal mechanism (4), a power transmission mechanism (5) and a flow adjusting mechanism (6); the method is characterized in that: the frame body (1) is cylindrical, a liquid inlet pipe (7) is fixedly installed in the right end wall of the frame body (1), and a mixing and stirring mechanism (3) is arranged at the right end inside the frame body (1); the mixing and stirring mechanism (3) consists of a stirring rod (31), a stirring block (32) and a motor (33); the stirring rod (31) is inserted and rotatably installed inside the frame body (1), the left side of the stirring rod (31) is rotatably inserted and connected to the middle part of the isolation plate (2), the right end of the stirring rod (31) is rotatably connected to the motor (33), and stirring blocks (32) are uniformly and symmetrically and fixedly installed on the outer surface of the stirring rod (31); the motor (33) is arranged on the right side of the outer part of the frame body (1); the isolation plate (2) is disc-shaped, the isolation plate (2) is fixedly arranged on the inner wall of the left end of the frame body (1), and the power transmission mechanism (5) is arranged on the left side of the isolation plate (2); a centrifugal mechanism (4) is arranged on the left side of the power transmission mechanism (5); the centrifugal mechanism (4) is arranged at the left end of the interior of the frame body (1), and the centrifugal mechanism (4) consists of a centrifugal disc (41), a guide plate (42), an inner gear ring (43), a conveying groove (44) and a conveying rail (45); the conveying groove (44) is formed in the inner part of the left end of the stirring rod (31); the middle part of the centrifugal disc (41) is rotatably connected to the outer surface of the left end of the stirring rod (31) through a bearing, a guide plate (42) is uniformly arranged on the left end wall of the centrifugal disc (41), and an inner gear ring (43) is fixedly connected to the right end wall of the centrifugal disc (41); a conveying rail (45) is arranged on the left side of the guide plate (42); the left end of the conveying rail (45) is fixedly connected to the inner wall of the frame body (1), the conveying rail (45) is mainly used for drawing the mixed foam liquid to a fixed position, and a liquid outlet pipe (8) is arranged on the lower side of the conveying rail (45); the liquid outlet pipe (8) is fixedly arranged in the lower wall of the left end of the frame body (1), and the lower end of the liquid outlet pipe (8) is fixedly connected with a flow regulating mechanism (6) through a flange;
the power transmission mechanism (5) is arranged inside the left end of the frame body (1), and the power transmission mechanism (5) consists of a first friction wheel (501), a second friction wheel (502), a first rotating shaft (503), a ball gear mechanism (504), a fixing plate (505), a shock absorber (506), a sliding block (507), an electric hydraulic rod (508), a protective frame (509), a sliding groove (510), a connecting telescopic rod (511), a second rotating shaft (512) and a straight gear (513); the first friction wheel (501) is fixedly arranged on the outer surface of the left end of the stirring rod (31), and a second friction wheel (502) is connected to the outer surface of the first friction wheel (501) in a friction rotating mode; the second friction wheel (502) is rotatably arranged on the fixed plate (505) through a first rotating shaft (503); a shock absorber (506) is fixedly arranged on the upper surface of the fixing plate (505); the upper ends of the shock absorbers (506) are fixedly arranged on the lower surfaces of the two ends of the sliding block (507); the upper end of the sliding block (507) is slidably arranged in a sliding groove (510) in the wall of the protective frame (509), and the right surface of the lower end of the sliding block (507) is fixedly provided with an electric hydraulic rod (508); the right end of the electric hydraulic rod (508) is fixedly arranged on the left side wall of the isolation plate (2); the protective frame (509) is in a cuboid shape, and the right end of the protective frame (509) is fixedly connected to the left side wall of the isolation plate (2); the left end of the first rotating shaft (503) is rotatably connected with a connecting telescopic rod (511) through a spherical gear mechanism (504); the connecting telescopic rod (511) is provided with torque, and the left end of the connecting telescopic rod (511) is rotatably connected with a second rotating shaft (512) through a spherical gear mechanism (504); the second rotating shaft (512) is rotatably arranged in the left end wall of the protective frame (509), and a spur gear (513) is fixedly arranged on the outer surface of the left end of the second rotating shaft (512); the straight gear (513) is rotationally connected to an inner gear ring (43) of the centrifugal mechanism (4).
2. A variable flow foam mixing feed system according to claim 1, wherein: the flow regulating mechanism (6) consists of a mounting ring (61), a mounting pipe (62) and a variable flow pipe (63); the mounting ring (61) is arranged below the liquid outlet pipe (8), the lower surface of the left end of the mounting ring (61) is fixedly mounted at the upper end of the mounting pipe (62), and the lower surface of the right end of the mounting ring (61) is fixedly welded with a variable flow pipe (63).
3. A variable flow foam mixing feed system according to claim 2, wherein: the upper end wall of the variable flow pipe (63) is thicker than the lower end wall, and an air hole (64) is arranged below the variable flow pipe (63); the air holes (64) are uniformly arranged in the wall of the mounting pipe (62).
4. A variable flow foam mixing feed system according to claim 2, wherein: the flow changing pipe (63) is composed of a plurality of helical blades (63a), and a helical groove (63b) is formed in the lower end of the flow changing pipe (63).
5. A variable flow foam mixing delivery system according to claim 4, wherein: the outer surface of the spiral blade (63a) is fixedly connected with a cylinder (63 c); the upper end of the cylinder (63c) is fixedly connected to the inner wall of the mounting pipe (62).
6. A foam fire engine is characterized in that: the foam fire engine uses a variable flow foam mix feed system as claimed in any one of claims 1 to 5.
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| CN201910169446.XA CN109821168B (en) | 2019-03-06 | 2019-03-06 | Variable-flow foam mixing and supplying system and fire fighting truck |
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| CN201910169446.XA CN109821168B (en) | 2019-03-06 | 2019-03-06 | Variable-flow foam mixing and supplying system and fire fighting truck |
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| CN112402846B (en) * | 2020-11-27 | 2022-07-12 | 湖南启睿智能科技有限公司 | Fire-fighting foam system |
| CN113975687B (en) * | 2021-09-24 | 2022-08-26 | 湖北江南专用特种汽车有限公司 | Variable-flow foam mixed supply fire fighting truck |
| CN114849109B (en) * | 2022-04-27 | 2023-08-01 | 安徽中科安和科技有限公司 | Compressed air foam generating device |
| CN115645798B (en) * | 2022-12-02 | 2024-01-16 | 向熠堃 | Multifunctional fire monitor with supercharging function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2863182Y (en) * | 2006-01-18 | 2007-01-31 | 孙英杰 | Explosion-proof water-wheel type nozzle foam generator |
| CN102182496B (en) * | 2011-03-21 | 2014-01-08 | 西安西科煤矿安全通风防灭火研究所有限公司 | Foam generator for preventing and extinguishing fire in coal mine |
| CN202015603U (en) * | 2011-04-11 | 2011-10-26 | 西安西科煤矿安全通风防灭火研究所有限公司 | Foam generator |
| CN202921184U (en) * | 2012-11-01 | 2013-05-08 | 安徽理工大学 | Mining foam generator |
| CN206366112U (en) * | 2017-01-03 | 2017-08-01 | 宗滨 | A kind of fixed froth installation |
| CN207412565U (en) * | 2017-09-12 | 2018-05-29 | 武汉迪克坦科技有限公司 | A kind of novel fire-fighting truck |
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