Carbonized fire retardant spraying device capable of automatically regulating and controlling flow and spraying method

Abstract

The invention relates to the technical field of forest fire control, in particular to a carbonized fireproofing agent spraying device capable of automatically regulating and controlling flow and a spraying method.The carbonized fireproofing agent spraying device comprises an unmanned aerial vehicle and a pesticide box and a spraying mechanism which are arranged on the unmanned aerial vehicle, the unmanned aerial vehicle comprises a control box, and the bottom of the control box is connected with the top of the pesticide box through a connecting column; a plurality of evenly-distributed supporting arms are connected to the side face of the control box, propeller assemblies are arranged on the upper sides of the ends, away from the control box, of the supporting arms, spraying mechanisms are connected to the lower sides of the supporting arms, and a plurality of male connectors are arranged on the side wall of the pesticide box and communicate with a pesticide pump in the pesticide box through first liquid conveying pipes. A female connector is arranged on the side, close to the pesticide box, of the spraying mechanism and connected with the male connector in an inserted mode, a sprayer is arranged on the side, away from the pesticide box, of the spraying mechanism, and a viscosity sensor is arranged on one side of the sprayer. The problems that an existing fireproofing agent spraying device cannot automatically regulate and control the flow and the medicine box is unreasonable in design are solved, the fireproofing agent spraying efficiency and effect are improved, and the practicability and reliability of the device are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of forest fire fighting, and in particular to a carbonized fire retardant spraying device and a spraying method capable of automatically regulating flow rate. Background Art

[0002] Among the many fire prevention measures, spraying carbonized fire retardants has become one of the most effective means due to its ability to form a heat-insulating carbonized layer on the surface of objects and effectively prevent the spread of flames. However, looking back at the traditional methods of spraying fire retardants, most of them rely heavily on manual operations. The traditional manual spraying of carbonized fire retardants faces many difficulties in forest fire prevention. Forest fire prevention areas are often huge, and the efficiency of manual spraying is extremely low. It is difficult to complete large-area coverage tasks in a short period of time. Moreover, some areas in the forest are inconvenient for transportation, and it is difficult for personnel and equipment to penetrate deeply, making it impossible for manual spraying to fully reach every corner, leaving many fire hazards.

[0003] In recent years, with the continuous advancement of science and technology, equipment for spraying fire retardants using drones has gradually entered the public eye and has played a certain role in areas such as forest fire prevention. However, existing equipment has many defects, such as the inability to automatically adjust the flow rate according to actual conditions. As a key medium in fire prevention work, the viscosity of fire retardants is not constant and will change due to various factors such as fluctuations in ambient temperature and extended storage time. In a high temperature environment, the viscosity of the fire retardant decreases and the fluidity increases; on the contrary, at low temperatures, the viscosity increases significantly. If the drone spraying equipment cannot keenly perceive these changes and adjust the spraying flow rate in time, uneven spraying is very likely to occur. In some areas, excessive spraying of fire retardants causes a waste of resources; in other areas, the amount of spraying is insufficient and an effective fire barrier cannot be formed, which greatly affects the fire prevention effect. Summary of the invention

[0004] The purpose of the present invention is to provide a carbonized fire retardant spraying device and a spraying method with automatic flow control, so as to solve the problems that the existing fire retardant spraying equipment cannot automatically control the flow and the medicine box design is unreasonable, improve the efficiency and effect of fire retardant spraying, and enhance the practicability and reliability of the equipment.

[0005] To achieve the above-mentioned purpose, the present invention provides a carbonized fire retardant spraying device with automatic flow control, including an unmanned aerial vehicle and a medicine box and a spraying mechanism arranged on the unmanned aerial vehicle, the unmanned aerial vehicle includes a control box, the bottom of the control box is connected to the top of the medicine box through a connecting column, a plurality of evenly distributed support arms are connected to the side of the control box, a propeller assembly is provided on the upper side of one end of the support arm away from the control box, the lower side of the support arm is connected to the spraying mechanism, a plurality of male connectors are provided on the side wall of the medicine box, the male connector is connected to the medicine pump inside the medicine box through an infusion tube, a female connector is provided on the side of the spraying mechanism close to the medicine box, the female connector is plug-connected to the male connector, a nozzle is provided on the side of the spraying mechanism away from the medicine box, and a viscosity sensor is provided on one side of the nozzle.

[0006] Preferably, a power supply and a control panel electrically connected to the power supply are provided in the control box, a data processing unit is mounted on the control panel, and the drug pump and the viscosity sensor are electrically connected to the control panel.

[0007] Preferably, the propeller assembly includes a mounting plate, a drive motor and a propeller, the bottom of the mounting plate is fixedly connected to the upper side of the support arm, the drive motor is fixedly connected to the upper side of the mounting plate, and the propeller is connected to the output shaft of the drive motor.

[0008] Preferably, the spraying mechanism includes a support rod, an infusion tube 2 and a nozzle, the support rod is fixedly connected to the lower side of the support arm through a fixing clamp 1, the lower side of the support rod is fixedly connected to the infusion tube 2 through a fixing clamp 2, the end of the infusion tube 2 away from the medicine box is connected to the nozzle, the end of the infusion tube 2 close to the medicine box is connected to the female connector, and a flow control valve is provided in the middle of the infusion tube 2.

[0009] Preferably, an annular clamping groove is provided on the outer side of the male connector, and a cavity one connected to an infusion tube one is provided inside the male connector.

[0010] Preferably, the female connector includes a plug-in part and a sliding sleeve, a cavity II connected to the spraying mechanism is provided in the middle of the plug-in part, the sliding sleeve is slidably connected to the outside of the plug-in part, a connecting protrusion is provided in the middle of the outside of the plug-in part, a limit platform is provided on the inner wall of the sliding sleeve, the cross-section of the limit platform is a right-angled trapezoidal structure, the straight side of the right-angled trapezoidal structure is connected to the connecting protrusion through a limiting spring, the plug-in part is also provided with an arc-shaped clamping hole corresponding to the clamping groove, a clamping ball is slidably connected in the arc-shaped clamping hole, the clamping ball is clamped and connected to the clamping groove, and a limiting rubber ring is provided on one side of the plug-in part located at the arc-shaped clamping hole, and the limiting rubber ring is located on the hypotenuse side of the right-angled trapezoidal structure.

[0011] More preferably, the diameter of the arc-shaped clamping hole gradually decreases from outside to inside, the diameter of the smallest end of the arc-shaped clamping hole is smaller than the diameter of the clamping ball, and the diameter of the largest end of the arc-shaped clamping hole is larger than the diameter of the clamping ball.

[0012] Preferably, a landing gear is provided on the lower side of the control box, and a medicine box is arranged inside the landing gear. The material of the medicine box is a carbon fiber composite material, and the inner wall of the medicine box is coated with a nano coating.

[0013] Preferably, a plurality of liquid storage chambers are provided inside the medicine box, a partition plate is provided between adjacent liquid storage chambers, a guide plate with a spiral structure is provided on the inner wall of the liquid storage chamber, an ultrasonic liquid level sensor is provided on one side of the top of the liquid storage chamber, a rotating rod is provided in the middle of the liquid storage chamber, the central axis of the rotating rod coincides with the central axis of the liquid storage chamber, and blades are fixedly connected to the rotating rod.

[0014] Preferably, a liquid infusion chamber is provided on the upper side of several liquid storage chambers, a liquid infusion valve connected to the liquid infusion chamber is provided on the other side of the top of the liquid storage chamber, a guide plate 2 is provided in the liquid infusion chamber around the liquid infusion valve, a liquid infusion port is provided on the top of one side of the medicine box extending from the liquid infusion chamber, and a sealing cover 1 is connected to the liquid infusion port through a thread.

[0015] Preferably, the bottoms of several liquid storage chambers are connected to the inspection port, and an annular groove is provided on the inner wall of the inspection port. A rotating plate is rotatably connected in the groove, and the rotating plate is equally divided into two semicircular parts, and a liquid outlet is provided on one of the semicircular parts.

[0016] Preferably, the bottom of the inspection port is connected to the second sealing cover via threads, the bottom of the rotating plate is located between the two semicircular parts and is connected to a baffle, and the side of the baffle away from the rotating plate is against the second sealing cover.

[0017] The above-mentioned spraying method of the carbonized fire retardant spraying device with automatic flow control comprises the following steps: S1. According to the actual fire protection requirements, inject different types or concentrations of carbonized fire retardant into the medicine box respectively; S2. Start the power of the drone control box, power on the control panel, control the drone, start the drive motor of the propeller assembly, drive the propeller to rotate at high speed, and slowly take off the drone. Fly the drone to the target area where the carbonized fire retardant needs to be sprayed, and maintain a stable flight altitude and attitude; S3. After the UAV reaches the target area, the medicine pump in the medicine box is started through the control panel, and the medicine pump starts to work, and the carbonized fire retardant in the medicine box enters the spraying mechanism through the infusion tube 1, the male connector, and the female connector; S4. The fire retardant flows to the nozzle through the spraying mechanism and is sprayed out from the nozzle to spray the target area. During the spraying process, the viscosity sensor detects the viscosity of the sprayed fire retardant in real time and transmits the detected data to the control box to regulate the spraying speed.

[0018] Beneficial effects of the present invention: (1) The present invention adopts the above-mentioned carbonized fire retardant spraying device and spraying method with automatic flow control, and by setting a viscosity sensor to monitor the viscosity of the fire retardant in real time, and combining a data processing unit and a flow control valve, it can automatically and accurately control the spraying flow according to the actual viscosity of the fire retardant, ensuring that the best spraying effect can be achieved under different environments and agent conditions, thereby improving the use efficiency of the fire retardant.

[0019] (2) The present invention adopts the above-mentioned carbonized fire retardant spraying device and spraying method with automatic flow control. The medicine box and the spraying mechanism are quickly connected through a male connector and a female connector, ensuring that the operation is simple and quick during installation and disassembly, improving the versatility and flexibility of the spraying mechanism. At the same time, the connection is stable and reliable, effectively preventing the connection from loosening or falling off due to vibration and other reasons during the flight of the drone, thereby ensuring the stability of the agent delivery.

[0020] (3) The present invention adopts the above-mentioned carbonized fire retardant spraying device and spraying method with automatic flow control. The medicine box adopts a multiple liquid storage chamber design, which can store multiple types or different concentrations of carbonized fire retardant at the same time to meet different fire protection needs. The spiral guide plate 1, rotating rod and blade design in the liquid storage chamber enable the agent to maintain its uniformity during storage and transportation. The setting of the liquid replenishment chamber and the guide plate 2 facilitates the replenishment of the agent and maintenance.

[0021] (4) The present invention adopts the above-mentioned carbonized fire retardant spraying device and spraying method with automatic flow control. The UAV adopts a medicine box made of carbon fiber composite materials and a reasonable structural design, which reduces the overall weight and improves the flight performance and endurance. The setting of the landing gear ensures the stability of the UAV during take-off and landing.

[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a carbonized fire retardant spraying device with automatic flow control of the present invention; Figure 2 It is a schematic diagram of the connection between a drone and a spraying mechanism of a carbonized fire retardant spraying device with automatic flow control of the present invention; Figure 3 It is a schematic diagram of a medicine box of a carbonized fire retardant spraying device with automatic flow control of the present invention; Figure 4 It is a schematic diagram of the internal structure of a medicine box of a carbonized fire retardant spraying device with automatic flow control of the present invention; Figure 5 It is a schematic diagram of a rotating plate of a carbonized fire retardant spraying device for automatically regulating flow rate according to the present invention; Figure 6It is a schematic diagram of a spraying mechanism of a carbonized fire retardant spraying device capable of automatically regulating flow rate according to the present invention; Figure 7 It is a schematic diagram of the combination of a female connector and a male connector of a carbonized fire retardant spraying device with automatic flow control of the present invention; Figure 8 The invention discloses a cross-sectional schematic diagram of the connection between a female connector and a male connector of a carbonized fire retardant spraying device capable of automatically regulating flow rate.

[0024] Reference numerals: 1. UAV; 11. Control box; 12. Landing gear; 13. Connecting column; 14. Support arm; 15. Propeller assembly; 151. Mounting plate; 152. Drive motor; 153. Propeller; 2. Medicine box; 21. Liquid storage chamber; 22. Partition plate; 23. Guide plate 1; 24. Rotating rod; 25. Blade; 26. Ultrasonic liquid level sensor; 27. Liquid replenishing chamber; 28. Liquid replenishing valve; 29. ​​Guide plate 2; 210. Liquid replenishing port; 211. Sealing cover 1; 212. Inspection port; 213. Groove; 214. Rotating plate; 2141. Liquid outlet; 2142. Baffle; 215. Sealing cover 2; 3. Spraying mechanism; 31. Support rod; 32. Infusion tube 2; 33. Spray head; 34. Fixing card 1; 35. Fixing card 2; 36. Viscosity sensor; 37. Flow control valve; 4. male connector; 41. snap-fit ​​groove; 42. cavity 1; 5. Female connector; 51. Plug-in portion; 52. Sliding sleeve; 53. Cavity II; 54. Connecting protrusion; 55. Limiting platform; 56. Limiting spring; 57. Arc-shaped clamping hole; 58. Clamping ball; 59. Limiting rubber ring. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments. Unless otherwise defined, the technical terms or scientific terms used in the present invention should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs. The above-mentioned features or features mentioned in the specific examples mentioned in the present invention can be combined arbitrarily, and these specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0026] Example like Figure 1 to Figure 2 As shown, the present invention provides a carbonized fire retardant spraying device with automatic flow control, including a drone 1 and a medicine box 2 and a spraying mechanism 3 arranged on the drone 1. The drone 1 includes a control box 11, and the control box 11 is provided with a power supply and a control panel electrically connected to the power supply. The control panel is equipped with a data processing unit, and the data processing unit is electrically connected to all electrical components of the spraying device. The data processing unit is a prior art, so it is not described in detail.

[0027] like Figures 3 to 5 As shown, a landing gear 12 is provided on the lower side of the control box 11, and a medicine box 2 is arranged inside the landing gear 12. The bottom of the control box 11 is connected to the top of the medicine box 2 through a connecting column 13. The medicine box 2 is made of a carbon fiber composite material, which has the characteristics of light weight and high strength, and can effectively reduce the load of the UAV 1 and improve the flight performance. The inner wall of the medicine box 2 is coated with a nano coating to prevent the medicine from corroding the medicine box 2 and extend the service life of the medicine box 2.

[0028] A plurality of liquid storage chambers 21 are provided inside the medicine box 2. Different liquid storage chambers 21 can be used to store fire retardants of different types or concentrations. A partition plate 22 is provided between adjacent liquid storage chambers 21 to achieve flexible deployment and use of multiple fire retardants to meet different operating scenarios and fire prevention requirements.

[0029] A guide plate 23 with a spiral structure is provided on the inner wall of the liquid storage chamber 21. When the drone 1 is in flight, the fire retardant in the pesticide box 2 will shake and flow due to the acceleration, deceleration, steering and other actions of the drone 1. The guide plate 23 with a spiral structure guides the fire retardant to form a specific spiral flow path in the medicine box 2, which can make the fire retardant tumble and mix continuously in the box, playing a stirring role. A rotating rod 24 is provided in the middle of the liquid storage chamber 21. The central axis of the rotating rod 24 coincides with the central axis of the liquid storage chamber 21, and a blade 25 is fixedly connected to the rotating rod 24. When the fire retardant flows in the box, it impacts the blade 25, driving the rotating rod 24 to rotate, and the rotating rod 24 and the blade 25 stir the surrounding fire retardant to make the fire retardant mix more evenly. By setting the guide plate 23 and the rotating rod 24, it is ensured that the fire retardant is always in a uniformly mixed state, avoiding precipitation, stratification and other phenomena, and ensuring that the composition and concentration of the sprayed fire retardant are consistent, thereby improving the stability of the fire prevention effect.

[0030] An ultrasonic liquid level sensor 26 is provided on one side of the top of the liquid storage chamber 21, which can monitor the liquid level height at different positions in the pesticide box 2 in real time and detect abnormal liquid level in time. The liquid level data is sent to the data processing unit of the drone 1 in real time through a wireless transmission module (existing technology), so that the operator can grasp the liquid level status in the pesticide box 2 at any time, replenish the fire retardant in time, and arrange the operation plan reasonably.

[0031] A liquid replenishment chamber 27 is provided on the upper side of several liquid storage chambers 21, and a liquid replenishment valve 28 connected to the liquid replenishment chamber 27 is provided on the other side of the top of the liquid storage chamber 21. A guide plate 29 is provided on the surrounding side of the liquid replenishment valve 28 in the liquid replenishment chamber 27 to guide the supplemented medicine to flow evenly into each liquid storage chamber 21. A liquid replenishment port 210 is provided on the top of one side of the liquid replenishment chamber 27 extending to the medicine box 2, and a sealing cover 211 is connected to the top of the liquid replenishment port 210 by threads, which is convenient for replenishing medicine and ensuring sealing. When it is necessary to replenish the carbonized fire retardant into the liquid storage chamber 21, first open the sealing cover 211 on the liquid replenishment port 210, pour the carbonized fire retardant to be replenished into the liquid replenishment chamber 27, and then open the liquid replenishment valve 28 of the corresponding liquid storage chamber 21, and guide it into the corresponding liquid storage chamber 21 after being guided by the guide plate 29.

[0032] The bottoms of several liquid storage chambers 21 are connected to the inspection port 212. An annular groove 213 is provided on the inner wall of the inspection port 212. A rotating plate 214 is rotatably connected in the groove 213. The rotating plate 214 is equally divided into two semicircular parts, and a liquid outlet 2141 is provided on one of the semicircular parts. The bottom of the inspection port 212 is connected to a sealing cover 215 by a thread. The bottom of the rotating plate is located between the two semicircular parts and is connected to a baffle 2142. The side of the baffle 2142 away from the rotating plate abuts against the sealing cover 215. When the liquid storage chamber 21 needs to be inspected or cleaned, the sealing cover 215 is opened, and the rotating plate is rotated so that the liquid outlet 2141 is aligned with the liquid storage chamber 21 that needs to be inspected, and the remaining medicine in the liquid storage chamber 21 can be discharged.

[0033] like Figure 1 As shown, a plurality of evenly distributed arms 14 are connected to the side of the control box 11, and a propeller assembly 15 is provided on the upper side of one end of the arm 14 away from the control box 11. The propeller assembly 15 includes a mounting plate 151, a drive motor 152 and a propeller 153. The bottom of the mounting plate 151 is fixedly connected to the upper side of the arm 14, the drive motor 152 is fixedly connected to the upper side of the mounting plate 151, and the propeller 153 is connected to the output shaft of the drive motor 152. The drive motor 152 drives the propeller 153 to rotate at a high speed, providing lift and forward power for the drone 1.

[0034] like Figure 6 As shown, the lower side of the support arm 14 is connected with a spraying mechanism 3 for spraying the carbonized fire retardant. The spraying mechanism 3 includes a support rod 31, a second infusion tube 32 and a nozzle 33. The support rod 31 is fixedly connected to the lower side of the support arm 14 through a fixing clamp 1 34. The lower side of the support rod 31 is fixedly connected to the second infusion tube 32 through a fixing clamp 2 35. The end of the second infusion tube 32 away from the medicine box 2 is connected to the nozzle 33. A viscosity sensor 36 is provided on one side of the nozzle 33. A flow control valve 37 is provided in the middle of the second infusion tube 32.

[0035] The viscosity sensor 36 may be a rotary viscosity sensor 36, a vibration viscosity sensor 36 or a capillary viscosity sensor 36 in the prior art, and is used to detect the viscosity of the sprayed fire retardant in real time. The viscosity sensor 36 transmits the real-time detected fire retardant viscosity data to the data processing unit, and the data processing unit regulates the flow control valve 37 according to the preset viscosity range or mass ratio and other parameters. When the viscosity is large or the mass ratio is large, the opening of the flow control valve 37 is increased to speed up the spraying speed. When the viscosity is small or the mass ratio is small, the opening of the flow control valve 37 is reduced to slow down the spraying speed, thereby realizing automatic regulation of the spraying flow rate.

[0036] like Figures 7 and 8 As shown, a plurality of male connectors 4 are provided on the side wall of the medicine box 2, and an annular clamping groove 41 is provided on the outer side of the male connector 4, and a cavity 42 connected to the infusion tube 1 is provided inside the male connector 4. The male connector 4 is connected to the medicine pump inside the medicine box 2 through the infusion tube 1. The medicine pump is a prior art and is not shown in the drawings. After the medicine pump is started, the fire retardant in the medicine box 2 can be transported to the male connector 4.

[0037] The infusion tube 2 32 of the spraying mechanism 3 is connected to the female connector 5 at one end close to the medicine box 2. The female connector 5 includes a plug-in portion 51 and a sliding sleeve 52. A cavity 2 53 connected to the spraying mechanism 3 is provided in the middle of the plug-in portion 51. The sliding sleeve 52 is slidably connected to the outside of the plug-in portion 51. A connecting protrusion 54 is provided in the middle of the outer side of the plug-in portion 51. A limiting platform 55 is provided on the inner wall of the sliding sleeve 52. The cross-section of the limiting platform 55 is a right-angled trapezoidal structure. The straight side of the right-angled trapezoidal structure is connected to the connecting protrusion 54 through a limiting spring 56. An arc-shaped clamping hole 57 corresponding to the clamping groove 41 is also provided on the plug-in portion 51. A clamping ball 58 is slidably connected in the arc-shaped clamping hole 57. The clamping ball 58 is clamped and connected to the clamping groove 41. A limiting rubber ring 59 is also provided on the side of the plug-in portion 51 located at the arc-shaped clamping hole 57. The limiting rubber ring 59 is located on the hypotenuse side of the right-angled trapezoidal structure. The diameter of the arc-shaped clamping hole 57 gradually decreases from the outside to the inside. The diameter of the smallest end of the arc-shaped clamping hole 57 is smaller than the diameter of the clamping ball 58 , and the diameter of the largest end of the arc-shaped clamping hole 57 is larger than the diameter of the clamping ball 58 .

[0038] During installation, the sliding sleeve 52 of the female connector 5 is slid so that the limiting platform 55 of the sliding sleeve 52 compresses the limiting spring 56 and moves in the direction of the connecting protrusion 54, the male connector 4 is inserted into the female connector 5, and the engaging groove 41 is moved to the arc-shaped engaging hole 57, so that the cavity 1 42 is connected with the cavity 2 53 to form a liquid delivery cavity, and then the sliding sleeve 52 is released, and the sliding sleeve 52 moves back under the restoring force of the limiting spring 56. At this time, the hypotenuse of the limiting platform 55 is about to squeeze the engaging ball 58 in the arc-shaped engaging hole 57 inward, so that the engaging ball 58 is engaged with the engaging groove 41, so that the female connector 5 and the male connector 4 are firmly connected. At the same time, the limiting rubber ring 59 also limits the sliding sleeve 52 to prevent the sliding sleeve 52 from detaching from the plug-in portion 51. The female connector 5 is plug-connected with the male connector 4, which facilitates the quick installation and removal of the spraying mechanism 3. When the spraying mechanism 3 needs to be replaced or repaired, the two can be easily separated without the need for too many tools or complicated operating steps, thereby improving work efficiency.

[0039] Example 2 The spraying method using the carbonized fire retardant spraying device with automatic flow control of embodiment 1 comprises the following steps: S1. According to the actual fire prevention needs, open the sealing cover 211 on the top of the medicine box 2, and inject different types or concentrations of carbonized fire retardant into each liquid storage cavity 21 in the medicine box 2. After the injection is completed, tighten the sealing cover 211 to ensure that the medicine box 2 is well sealed to prevent leakage of the agent.

[0040] S2. Start the power of the control box 11 of the drone 1, power on the control panel, control the drone 1, start the drive motor 152 of the propeller assembly 15, drive the propeller 153 to rotate at high speed, and the drone 1 slowly takes off. Using the positioning algorithm (existing technology) of the data processing unit carried by the drone 1, fly the drone 1 to the target area where the carbonized fire retardant needs to be sprayed, and maintain a stable flight altitude and attitude.

[0041] S3. After the drone 1 reaches the target area, the medicine pump in the medicine box 2 is started through the control panel, and the medicine pump starts to work, and the carbonized fire retardant in the medicine box 2 enters the spraying mechanism 3 through the infusion tube 1, the male connector 4, and the female connector 5; S4, the fire retardant enters the second infusion pipe 32 and flows to the nozzle 33, and is sprayed from the nozzle 33 to spray the target area. During the spraying process, the viscosity sensor 36 detects the viscosity of the sprayed fire retardant in real time, and transmits the detected data to the data processing unit carried by the drone 1. The data processing unit analyzes the real-time viscosity data according to the preset viscosity standard range (through the algorithm in the prior art). When it is detected that the viscosity of the fire retardant increases, the data processing unit instructs the flow control valve 37 to increase the opening, so that more fire retardant is sprayed from the nozzle 33 through the second infusion pipe 32 to ensure the spraying effect; when the viscosity decreases, the flow control valve 37 is reduced to avoid excessive spraying of the fire retardant.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A carbonized fire retardant spraying device with automatic flow control, comprising a drone, a medicine box and a spraying mechanism arranged on the drone, characterized in that: The drone includes a control box, the bottom of which is connected to the top of a medicine box through a connecting column, a plurality of evenly distributed arms are connected to the side of the control box, a propeller assembly is provided on the upper side of one end of the arm away from the control box, a spraying mechanism is connected to the lower side of each arm, a plurality of male connectors are provided on the side wall of the medicine box, the male connector is connected to a medicine pump inside the medicine box through an infusion tube, a female connector is provided on a side of the spraying mechanism close to the medicine box, the female connector is plug-connected to the male connector, a nozzle is provided on a side of the spraying mechanism away from the medicine box, and a viscosity sensor is provided on one side of the nozzle.

2. The carbonized fire retardant spraying device with automatic flow control according to claim 1 is characterized in that: A power source and a control panel electrically connected to the power source are arranged in the control box. A data processing unit is mounted on the control panel. The medicine pump and the viscosity sensor are electrically connected to the control panel.

3. The carbonized fire retardant spraying device with automatic flow control according to claim 1 is characterized in that: The propeller assembly comprises a mounting plate, a driving motor and a propeller. The bottom of the mounting plate is fixedly connected to the upper side of the support arm, the driving motor is fixedly connected to the upper side of the mounting plate, and the propeller is connected to the output shaft of the driving motor.

4. The carbonized fire retardant spraying device with automatic flow control according to claim 1 is characterized in that: The spraying mechanism includes a support rod, an infusion tube 2 and a nozzle. The support rod is fixedly connected to the lower side of the support arm through a fixing clamp 1. The lower side of the support rod is fixedly connected to the infusion tube 2 through a fixing clamp 2. The end of the infusion tube 2 away from the medicine box is connected to the nozzle, and the end of the infusion tube 2 close to the medicine box is connected to the female connector. A flow control valve is provided in the middle of the infusion tube 2.

5. The carbonized fire retardant spraying device with automatic flow control according to claim 1 is characterized in that: A landing gear is provided on the lower side of the control box, and a medicine box is arranged inside the landing gear. The material of the medicine box is a carbon fiber composite material, and the inner wall of the medicine box is coated with a nano coating.

6. The carbonized fire retardant spraying device with automatic flow control according to claim 1 is characterized in that: Several liquid storage chambers are arranged inside the medicine box, partition plates are arranged between adjacent liquid storage chambers, a guide plate with a spiral structure is arranged on the inner wall of the liquid storage chamber, an ultrasonic liquid level sensor is arranged on one side of the top of the liquid storage chamber, a rotating rod is arranged in the middle of the liquid storage chamber, the central axis of the rotating rod coincides with the central axis of the liquid storage chamber, and blades are fixedly connected to the rotating rod.

7. The carbonized fire retardant spraying device with automatic flow control according to claim 6 is characterized in that: A liquid replenishment chamber is provided on the upper side of several liquid storage chambers, and a liquid replenishment valve connected to the liquid replenishment chamber is provided on the other side of the top of the liquid storage chamber. A guide plate 2 is provided on the surrounding side of the liquid replenishment valve in the liquid replenishment chamber. A liquid replenishment port is provided on the top of one side of the medicine box extending from the liquid replenishment chamber, and a sealing cover 1 is connected to the liquid replenishment port through a thread.

8. The carbonized fire retardant spraying device with automatic flow control according to claim 6 is characterized in that: The bottoms of several liquid storage chambers are connected with the inspection port. The inner wall of the inspection port is provided with an annular groove. A rotating plate is rotatably connected in the groove. The rotating plate is equally divided into two semicircular parts, and a liquid outlet is provided on one of the semicircular parts.

9. The carbonized fire retardant spraying device with automatic flow control according to claim 8 is characterized in that: The bottom of the inspection port is connected with a second sealing cover through a thread, the bottom of the rotating plate is located between two semicircular parts and is connected with a baffle, and the side of the baffle away from the rotating plate is against the second sealing cover.

10. A method for spraying a carbonized fire retardant spraying device with automatic flow control as claimed in any one of claims 1 to 9, characterized in that: The following steps are included: S1. According to the actual fire protection requirements, inject different types or concentrations of carbonized fire retardant into the medicine box respectively; S2. Start the power of the drone control box, power on the control panel, control the drone, start the drive motor of the propeller assembly, drive the propeller to rotate at high speed, and slowly take off the drone. Fly the drone to the target area where the carbonized fire retardant needs to be sprayed, and maintain a stable flight altitude and attitude; S3. After the UAV reaches the target area, the medicine pump in the medicine box is started through the control panel, and the medicine pump starts to work, and the carbonized fire retardant in the medicine box enters the spraying mechanism through the infusion tube 1, the male connector, and the female connector; S4. The fire retardant flows to the nozzle through the spraying mechanism and is sprayed out from the nozzle to spray the target area. During the spraying process, the viscosity sensor detects the viscosity of the sprayed fire retardant in real time and transmits the detected data to the control box to regulate the spraying speed.

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