Spraying equipment for preventing and controlling atmospheric pollution

Abstract

The invention relates to spraying equipment for preventing and controlling atmospheric pollution in the field of spraying devices, and through a plurality of nozzles mounted on a rotating ring and an inserting cylinder driven by an electric push rod, the nozzles are quickly replaced, the spray particle size is quickly and accurately adjusted, and the mode of manually replacing the nozzles is replaced; the spray particle size adjusting efficiency and accuracy are improved, the requirement of low-temperature weather for the fog drop particle size is met, fog drop icing is delayed, and the dust adsorption capacity of fog drops at the low temperature is improved; meanwhile, the spray particle size is detected in real time through a laser particle size instrument arranged on the front side of the air blowing cylinder, and when it is found that the spray particle size does not meet the requirement, early warning is given out in time to remind an operator to conduct maintenance, and waste of sedimentation liquid is reduced; in addition, by arranging a heating sleeve and a heat exchange pipe, the sedimentation liquid is preheated and heated in winter, the freezing speed of the fog drops is further delayed, the dust particle adsorption effect of the fog drops is improved, and energy is saved.

Description

Technical Field

[0001] The present invention relates to an air pollution prevention and control device, in particular to a spray device for air pollution prevention and control applied to the field of spraying devices. Background Art

[0002] The fog cannon vehicle atomizes water into tiny droplets through high pressure and sprays them into the air, so that pollutants (such as dust) combine with the droplets and then settle, thereby reducing the concentration of pollutants in the air and achieving the effect of air pollution prevention and control. In actual use, especially under low-temperature conditions in winter, when the droplet size is too small, the droplets are prone to freeze and cannot combine well with dust particles for settlement; therefore, the droplet size has an important impact on the adsorption and settlement effect of droplets; the traditional method of controlling the droplet size is to manually replace different nozzles, which is not only cumbersome to operate, but also cannot accurately measure the range of droplet size and cannot well control the droplet size.

[0003] The existing patent with the publication number of CN113134433B discloses an adjustable uniform spray device for air pollution prevention and control, which relates to the field of air pollution control technology, including a trolley body. A pair of bottom plates are installed on the top of the trolley, and a pair of columns are fixedly connected to the top of the pair of bottom plates. One end of the pair of columns is rotatably connected to the same air duct. The air duct includes a first air outlet and a second air outlet. A blowing unit is installed in the air duct, a spraying part is installed in the air duct, the spraying part is respectively connected to the first air outlet and the second air outlet, and a spraying swing part is installed on the spraying part. The structure of the present invention is reasonable, which improves the spraying effect, makes the spraying more uniform, can perform swing spraying, increases the spraying range, has a good spraying effect, and can adjust the flow rate during spraying by setting a spraying flow rate switching part, so as to realize spraying different water mists according to different sites and improve the air pollution control effect.

[0004] The above-mentioned prior art discloses a swing spraying method and a flow rate adjustment method to realize the adjustment of spraying flow rate and spraying range, but does not solve the problem that droplets are prone to freeze at low temperature and affect the adsorption of dust particles. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is the problem that droplets are prone to freeze at low temperature in winter.

[0006] To solve the above problems, the present invention provides a spraying device for preventing and controlling air pollution, including a vehicle body, a water tank and a spraying mechanism installed on the vehicle body; the spraying mechanism includes a blast tube with a blower installed at the end, and a spraying component is fixedly connected to the spraying end of the blast tube. The spraying component includes a fixed tube fixedly connected to the blast tube. A rotating ring is rotatably connected inside the fixed tube. A toothed ring is fixedly connected to the outer end of the rotating ring. The toothed ring meshes with a driving gear. The driving gear is fixedly connected to a fourth motor. The fourth motor is fixedly connected to the outer wall of the fixed tube. Multiple nozzle groups distributed in a circumferential manner are fixedly connected to the rotating ring. Each nozzle group includes multiple nozzles with gradually increasing spray hole diameters.

[0007] An insertion tube cooperated with the nozzle is arranged outside the rotating ring. The movable end of an electric push rod is fixedly connected to the insertion tube. The fixed end of the electric push rod is fixedly connected to the inner wall of the fixed tube. The electric push rod drives the insertion tube to move radially, realizing the connection and disconnection between the insertion tube and the nozzle. The insertion tube is fixedly communicated with a liquid injection pipe. The liquid injection pipe is fixedly communicated with an annular pipe. The annular pipe is fixedly communicated with an infusion pipe. The infusion pipe is fixedly communicated with a water pump. The water pump is fixedly communicated with the water tank.

[0008] A detection tube made of a transparent material is fixedly connected to the front side of the fixed tube. A laser particle size analyzer is arranged outside the detection tube. The laser particle size analyzer is fixedly connected to an installation tube fixedly connected to the detection tube. The water pump, the fourth motor, the electric push rod and the laser particle size analyzer are electrically connected to the same controller. The controller is equipped with an alarm module.

[0009] In the above spraying device for preventing and controlling air pollution, through the rotating ring equipped with multiple nozzles and the insertion tube connected with the electric push rod, the efficient switching of nozzles with different apertures is realized to increase the droplet diameter.

[0010] As a further improvement of the present application, a heating sleeve is fixedly sleeved on the side of the infusion pipe close to the annular pipe. A heating wire spirally sleeved outside the infusion pipe is fixedly connected inside the heating sleeve. A heat-conducting material is filled between the heating wire and the infusion pipe.

[0011] As a further improvement of the present application, the blast tube is a hollow conical tube structure. The fixed tube is an annular tube and a central hole with an inner diameter equal to the inner diameter of the outlet end of the blast tube is opened at the central position. The inner diameter of the detection tube is equal to the inner diameter of the central hole of the fixed tube. An annular cavity is formed by the enclosure of the rotating ring and the fixed tube. The insertion tube, the electric push rod, the toothed ring and the driving gear are all arranged in the annular cavity. The inner diameter of the rotating ring is equal to the inner diameter of the outlet end of the blast tube.

[0012] As a further improvement of the present application, the nozzle is a hollow round tube with an open outer end. A sealing ring is fixedly connected to the open outer end of the nozzle. A conical cavity is opened in the sealing ring. A conical protrusion cooperated with the conical cavity is arranged at the inner end of the insertion tube. The nozzle penetrates through the rotating ring and extends to the inner side of the rotating ring. The spray holes are opened at the inner end of the nozzle and are distributed in a circumferential manner.

[0013] As a further improvement of the present application, a filter net is fixedly connected to the inlet end of the blast pipe. The blower includes an impeller disposed inside the filter net. The impeller is fixedly connected to the output shaft of a first motor, and the first motor is fixed to the outer wall of the filter net. The first motor is electrically connected to the controller.

[0014] As a further improvement of the present application, the blast pipe is fixedly connected to the vehicle body through an adjustment platform. The adjustment platform includes a hinge rod fixedly connected to the blast pipe. The lower end of the hinge rod is hinged to a rotating shaft. The hinge rod is fixedly connected to the output shaft of a second motor, and the second motor is fixedly connected to the rotating shaft. The lower end of the rotating shaft is rotatably connected to a base fixedly connected to the vehicle body. A third motor is fixedly connected inside the base, and the output shaft of the third motor is fixedly connected to the lower end of the rotating shaft. Both the second motor and the third motor are electrically connected to the controller.

[0015] As a further improvement of the present application, a negative ion generator is fixedly connected inside the blast pipe. The negative ion generator is used to ionize the air flow flowing through the blast pipe to generate an electrically charged air flow. The negative ion generator is electrically connected to the controller.

[0016] As a further improvement of the present application, the heating sleeve is fixedly connected to the blast pipe through a fixing rod. The annular pipe is fixedly connected with a temperature sensor, and both the temperature sensor and the heating wire are electrically connected to the controller.

[0017] As a further improvement of the present application, a sleeve fixedly connected to the filter net is sleeved outside the first motor. A closed annular cavity is formed by enclosing the sleeve, the filter net and the first motor. A heat exchange pipe sleeved outside the first motor is disposed inside the annular cavity, and the heat exchange pipe is fixedly communicated with the infusion pipe.

[0018] As a further improvement of the present application, when adjusting the droplet size, the following steps are included:

[0019] Step 1: Start the electric push rod to retract it. The electric push rod drives the insertion cylinder to disengage from the current nozzle, and then turn off the electric push rod.

[0020] Step 2: Start the fourth motor. The rotating ring drives the nozzle group to rotate in a circular motion, so that the nozzle meeting the aperture requirement moves to the relative position of the insertion cylinder, and then turn off the fourth motor.

[0021] Step 3: Start the electric push rod again to extend it, so that the insertion cylinder is inserted into the nozzle meeting the aperture requirement.

[0022] Step 4: After the adjustment is completed, start the water pump and the blower of the blast pipe, so that the droplets after the size adjustment are ejected. When the droplets pass through the detection cylinder, start the laser particle size analyzer to monitor the particle size of the generated droplets. When the detected droplet particle size does not meet the requirement, the controller issues a warning through the alarm module.

[0023] In summary, the present invention realizes the rapid replacement of nozzles and the rapid and precise adjustment of the spray particle size through multiple nozzles installed on the rotating ring and the inserting cylinder driven by the electric push rod, replaces the method of manually replacing nozzles, improves the efficiency and accuracy of spray particle size adjustment, meets the requirements for the droplet size in low-temperature weather, delays the icing of droplets, and improves the ability of droplets to adsorb dust at low temperatures. At the same time, the laser particle size analyzer arranged on the front side of the air blast cylinder detects the spray particle size in real time. When it is found that the spray particle size does not meet the requirements, a warning is issued in time to remind the operator to carry out maintenance and reduce the waste of the sedimentation liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structural schematic diagram of the present application;

[0025] Figure 2 is a three-dimensional structural schematic diagram of the spraying mechanism in the present application;

[0026] Figure 3 is a transverse sectional structural schematic diagram of the spraying mechanism in the present application;

[0027] Figure 4 is Figure 3 an enlarged structural schematic diagram of part A in

[0028] Figure 5 is an exploded assembly structural schematic diagram of the spraying assembly in the present application;

[0029] Figure 6 is a schematic diagram of the motion states of the nozzle and the inserting cylinder in the present application;

[0030] Figure 7 is an exploded assembly structural schematic diagram of the adjusting table in the present application;

[0031] Figure 8 is Figure 3 an enlarged structural schematic diagram of part B in

[0032] Figure 9 is an assembly structural schematic diagram of the heat exchange tube and the sleeve in the present application.

[0033] Description of the reference numerals in the drawings:

[0034] 1. Vehicle body; 2. Water tank; 3. Spraying mechanism; 4. Blower tube; 5. Filter screen; 6. Impeller; 7. First motor; 8. Spraying assembly; 9. Infusion tube; 10. Water pump; 11. Adjusting platform; 1101. Hinge rod; 1102. Rotating shaft; 1103. Third motor; 1104. Base; 1105. Third motor; 12. Fixed cylinder; 13. Rotating ring; 14. Tooth ring; 15. Driving gear; 16. Fourth motor; 17. Nozzle; 1701. Spray hole; 18. Insertion cylinder; 19. Electric push rod; 20. Liquid injection tube; 21. Annular tube; 22. Sealing ring; 23. Detection cylinder; 24. Installation cylinder; 25. Laser particle size analyzer; 26. Negative ion generator; 27. Heating sleeve; 28. Heating wire; 29. Fixed rod; 30. Sleeve; 31. Heat exchange tube; 32. Temperature sensor. Detailed implementation manners

[0035] The following describes in detail two implementation manners of the present application with reference to the accompanying drawings.

[0036] The first implementation manner:

[0037] Figure 1-7 There is shown a spraying device for air pollution prevention and control, including a vehicle body 1, a water tank 2 and a spraying mechanism 3 mounted on the vehicle body 1; the spraying mechanism 3 includes a blower tube 4 with a blower mounted at the end, the spraying end of the blower tube 4 is fixedly connected with a spraying assembly 8, the spraying assembly 8 includes a fixed cylinder 12 fixedly connected with the blower tube 4, a rotating ring 13 is rotatably connected inside the fixed cylinder 12, a tooth ring 14 is fixedly connected to the outer end of the rotating ring 13, the tooth ring 14 meshes with a driving gear 15, the driving gear 15 is fixedly connected with a fourth motor 16, and the fourth motor 16 is fixedly connected with the outer wall of the fixed cylinder 12; the fourth motor 16 drives the rotating ring 13 to rotate through the driving gear 15 and the tooth ring 14; multiple groups of nozzle sets distributed in a circumferential manner are fixedly connected to the rotating ring 13, and each nozzle set includes a plurality of nozzles 17 with gradually increasing diameters of spray holes 1701.

[0038] Please refer to Figure 4 , an insertion cylinder 18 cooperatively arranged with the nozzle 17 is provided outside the rotating ring 13, the movable end of an electric push rod 19 is fixedly connected to the insertion cylinder 18, the fixed end of the electric push rod 19 is fixedly connected to the inner wall of the fixed cylinder 12, the electric push rod 19 drives the insertion cylinder 18 to move radially, realizing the connection and disconnection between the insertion cylinder 18 and the nozzle 17, the insertion cylinder 18 is fixedly communicated with a liquid injection tube 20, the liquid injection tube 20 is fixedly communicated with an annular tube 21, the annular tube 21 is fixedly communicated with an infusion tube 9, the infusion tube 9 is fixedly communicated with a water pump 10, and the water pump 10 is fixedly communicated with the water tank 2;

[0039] Please refer to Figure 4 and Figure 5, a detection cylinder 23 made of a transparent material is fixedly connected to the front side of the fixed cylinder 12. A laser particle size analyzer 25 is provided outside the detection cylinder 23. The laser particle size analyzer 25 is fixedly connected to an installation cylinder 24 fixedly connected to the detection cylinder 23. The water pump 10, the fourth motor 16, the electric push rod 19, and the laser particle size analyzer 25 are electrically connected to the same controller, and the controller is equipped with an alarm module.

[0040] Specifically, please refer to Figure 6 , when it is necessary to adjust the droplet size, the following steps are included:

[0041] Step 1, start the electric push rod 19 to retract it. The electric push rod 19 drives the insertion cylinder 18 to disengage from the current nozzle 17, and then turn off the electric push rod 19;

[0042] Step 2, start the fourth motor 16. The rotating ring 13 drives the nozzle group to rotate in a circle, so that the nozzle 17 meeting the aperture requirement moves to the relative position of the insertion cylinder 18, and then turn off the fourth motor 16;

[0043] Step 3, start the electric push rod 19 again to extend it, so that the insertion cylinder 18 is inserted into the nozzle 17 meeting the aperture requirement;

[0044] Step 4, after the adjustment is completed, start the water pump 10 and the fan of the air blowing cylinder 4, so that the droplets after the size adjustment are ejected. When the droplets pass through the detection cylinder 23, start the laser particle size analyzer 25 to monitor the particle size of the generated droplets. When the detected droplet particle size does not meet the requirements, the controller issues a warning through the alarm module to remind the operator to perform maintenance.

[0045] Specifically, the laser particle size analyzer 25 is an existing device, and those skilled in the art can select the specifications according to needs; it should be noted that the reasons for the droplet particle size not meeting the requirements are diverse, and examples are as follows: the spray hole 1701 of the nozzle 17 is blocked, the fan of the air blowing cylinder 4 is damaged, and the water pump 10 fails to cause insufficient droplet spraying pressure.

[0046] Compared with traditional air pollution prevention and control equipment, the present invention realizes the rapid replacement of the nozzle 17 and the rapid and precise adjustment of the spray particle size through a plurality of nozzles 17 installed on the rotating ring 13 and the insertion cylinder 18 driven by the electric push rod 19, replaces the method of manually replacing the nozzle, improves the efficiency and accuracy of spray particle size adjustment, and adapts to the requirements for droplet particle size in high-temperature weather (droplet particle size is too small and easy to evaporate in high-temperature weather) and low-temperature weather; at the same time, the laser particle size analyzer 25 provided on the front side of the air blowing cylinder 4 is used to detect the spray particle size in real time. When it is found that the spray particle size does not meet the requirements, a warning is issued in time to remind the operator to perform maintenance, reducing the waste of the settling liquid.

[0047] Please refer to Figure 3 andFigure 4 The air blower tube 4 is a hollow conical tube structure. The fixed tube 12 is an annular tube and has a central hole at its center with an inner diameter equal to that of the outlet end of the air blower tube 4. The detection tube 23 has the same inner diameter as the central hole of the fixed tube 12. An annular cavity is formed by enclosing the rotating ring 13 and the fixed tube 12. The insertion tube 18, the electric push rod 19, the toothed ring 14, and the driving gear 15 are all arranged in the annular cavity. The inner diameter of the rotating ring 13 is equal to that of the outlet end of the air blower tube 4.

[0048] Please refer to Figure 4 The nozzle 17 is a hollow round tube with an open outer end. A sealing ring 22 is fixedly connected to the open outer end of the nozzle 17. The sealing ring 22 is provided with a conical cavity. The inner end of the insertion tube 18 is provided with a conical protrusion that cooperates with the conical cavity. The nozzle 17 penetrates through the rotating ring 13 and extends to the inner side of the rotating ring 13. The spray holes 1701 are opened at the inner end of the nozzle 17 and are circumferentially distributed.

[0049] Specifically, the air flow generated by the fan of the air blower tube 4 is compressed in the air blower tube 4 and then discharged from the outlet end. Then the air flow enters into the rotating ring 13 and contacts the droplets sprayed from the nozzle 17. The air flow mixed with the droplets then passes through the detection tube 23, and the sealing performance between the two is improved through the cooperation of the sealing ring 22 and the inner end of the insertion tube 18.

[0050] Please refer to Figure 3 A filter net 5 is fixedly connected to the inlet end of the air blower tube 4. The fan includes an impeller 6 arranged inside the filter net 5. The impeller 6 is fixedly connected to the output shaft of a first motor 7. The first motor 7 is fixed on the outer wall of the filter net 5. The first motor 7 is electrically connected to the controller.

[0051] Specifically, the first motor 7 drives the impeller 6 to rotate, so that the air flow enters into the air blower tube 4 through the filter net 5, realizing air flow filtration, reducing the dust in the air flow, improving the forming quality of the droplets, and further improving the effect of droplet diameter control.

[0052] Please refer to Figure 3 and Figure 7 The air blower tube 4 is fixedly connected to the vehicle body 1 through an adjusting platform 11. The adjusting platform 11 includes a hinge rod 1101 fixedly connected to the air blower tube 4. The lower end of the hinge rod 1101 is hinged to a rotating shaft 1102. The hinge rod 1101 is fixedly connected to the output shaft of a second motor 1103. The second motor 1103 is fixedly connected to the rotating shaft 1102. The lower end of the rotating shaft 1102 is rotatably connected to a base 1104 fixedly connected to the vehicle body 1. A third motor 1105 is fixedly connected inside the base 1104. The output shaft of the third motor 1105 is fixedly connected to the lower end of the rotating shaft 1102. Both the second motor 1103 and the third motor 1105 are electrically connected to the controller.

[0053] Specifically, the second motor 1103 drives the articulated rod 1101 and the air blower cylinder 4 thereon to rotate, adjusting the injection elevation angle of the air blower cylinder 4; the third motor 1105 drives the rotating shaft 1102 to rotate, adjusting the orientation of the air blower cylinder 4.

[0054] Please refer to Figure 3 , a negative ion generator 26 is fixedly connected inside the air blower cylinder 4. The negative ion generator 26 ionizes the air flow passing through the air blower cylinder 4 to generate an electrically charged air flow. The negative ion generator 26 is electrically connected to the controller. Then, the electrically charged air flow contacts the droplets to form charged droplets, thereby increasing the adsorption capacity of the droplets for dust particles and improving the sedimentation effect.

[0055] The second implementation mode:

[0056] Figure 3 , Figure 4 , Figure 8 and Figure 9 shows a spraying device for air pollution prevention and control. On the basis of the first implementation mode, a heating sleeve 27 is fixedly sleeved on one side of the infusion tube 9 close to the annular tube 21. A heating wire 28 spirally sleeved outside the infusion tube 9 is fixedly connected inside the heating sleeve 27. A heat-conducting material is filled between the heating wire 28 and the infusion tube 9.

[0057] Specifically, the heating wire 28 heats the sedimentation liquid to be sprayed into the nozzle 17, so that the temperature of the sprayed droplets is relatively high. When spraying and sedimenting in the northern regions in winter, in addition to slowing down the freezing trend of the droplets by increasing the droplet size (the surface area / volume ratio of large-sized droplets is smaller than that of small-sized droplets, and the freezing speed of large-sized droplets is slower), the freezing speed of the droplets can be further reduced by increasing the droplet temperature, improving the adsorption effect; it should be noted that the heat-conducting material is one of thermal grease, thermal adhesive, alumina, aluminum nitride, boron nitride, and graphene.

[0058] Please refer to Figure 3 and Figure 4 , the heating sleeve 27 is fixedly connected to the air blower cylinder 4 through a fixing rod 29. The annular tube 21 is fixedly connected with a temperature sensor 32. Both the temperature sensor 32 and the heating wire 28 are electrically connected to the controller.

[0059] Specifically, the temperature of the sedimentation liquid to be sprayed is precisely controlled through the cooperation of the temperature sensor 32 and the heating wire 28, thereby controlling the temperature of the droplets.

[0060] Please refer to Figure 8 and Figure 9, a sleeve 30 fixedly connected to the filter net 5 is sleeved outside the first motor 7. A closed annular cavity is formed by enclosing the sleeve 30, the filter net 5 and the first motor 7. A heat exchange tube 31 sleeved outside the first motor 7 is arranged in the annular cavity, and the heat exchange tube 31 is fixedly communicated with the infusion tube 9.

[0061] Specifically, the first motor 7 is heat-exchanged by the sedimentation liquid, the capacity accumulated during the long-term operation of the first motor 7 is reduced, and the sedimentation liquid is preheated, so that the power output of the heating wire 28 is reduced, the electric energy consumption in winter is saved, and at the same time, the fog droplets are not easy to freeze. It should be noted that under the low-temperature condition in winter, the sedimentation liquid includes water and antifreeze.

[0062] Combined with the current actual requirements, the above implementation manner adopted in this application is not limited to this scope. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A spraying device for preventing and controlling air pollution, characterized in that, It includes a vehicle body (1), a water tank (2) and a spraying mechanism (3) mounted on the vehicle body (1); the spraying mechanism (3) includes a blast tube (4) with a blower installed at the end, and a spraying assembly (8) is fixedly connected to the spraying end of the blast tube (4). The spraying assembly (8) includes a fixed cylinder (12) fixedly connected to the blast tube (4). A rotating ring (13) is rotatably connected inside the fixed cylinder (12). A toothed ring (14) is fixedly connected to the outer end of the rotating ring (13). The toothed ring (14) meshes with a driving gear (15). The driving gear (15) is fixedly connected to a fourth motor (16). The fourth motor (16) is fixedly connected to the outer wall of the fixed cylinder (12). A plurality of nozzle groups distributed in a circular pattern are fixedly connected to the rotating ring (13). Each nozzle group includes a plurality of nozzles (17) with the diameter of the spray holes (1701) gradually increasing. An insertion cylinder (18) cooperating with the nozzle (17) is arranged outside the rotating ring (13). The movable end of an electric push rod (19) is fixedly connected to the insertion cylinder (18). The fixed end of the electric push rod (19) is fixedly connected to the inner wall of the fixed cylinder (12). The electric push rod (19) drives the insertion cylinder (18) to move radially, realizing the connection and disconnection between the insertion cylinder (18) and the nozzle (17). The insertion cylinder (18) is fixedly connected and communicated with a liquid injection pipe (20). The liquid injection pipe (20) is fixedly connected and communicated with an annular pipe (21). The annular pipe (21) is fixedly connected and communicated with an infusion pipe (9). The infusion pipe (9) is fixedly connected and communicated with a water pump (10). The water pump (10) is fixedly connected and communicated with the water tank (2). A detection cylinder (23) made of a transparent material is fixedly connected to the front side of the fixed cylinder (12). A laser particle size analyzer (25) is arranged outside the detection cylinder (23). The laser particle size analyzer (25) is fixedly connected to an installation cylinder (24) fixedly connected to the detection cylinder (23). The water pump (10), the fourth motor (16), the electric push rod (19) and the laser particle size analyzer (25) are electrically connected to the same controller. The controller is equipped with an alarm module.

2. The spray device for preventing and controlling air pollution according to claim 1, characterized in that, A heating sleeve (27) is fixedly sleeved on one side of the infusion pipe (9) close to the annular pipe (21). A heating wire (28) spirally sleeved outside the infusion pipe (9) is fixedly connected inside the heating sleeve (27). A heat-conducting material is filled between the heating wire (28) and the infusion pipe (9).

3. A spraying device for air pollution prevention and control according to claim 1, characterized in that, The blast tube (4) is a hollow conical tube structure. The fixed cylinder (12) is an annular cylinder and a central hole with an inner diameter equal to the inner diameter of the outlet end of the blast tube (4) is opened at the central position. The inner diameter of the detection cylinder (23) is equal to the inner diameter of the central hole of the fixed cylinder (12). An annular cavity is formed by the enclosure of the rotating ring (13) and the fixed cylinder (12). The insertion cylinder (18), the electric push rod (19), the toothed ring (14) and the driving gear (15) are all arranged in the annular cavity. The inner diameter of the rotating ring (13) is equal to the inner diameter of the outlet end of the blast tube (4).

4. The spray device for preventing and controlling air pollution according to claim 1, characterized in that, The nozzle (17) is a hollow circular tube with an open outer end. A sealing ring (22) is fixedly connected to the open outer end of the nozzle (17). The sealing ring (22) is provided with a conical cavity. A conical protrusion cooperating with the conical cavity is provided at the inner end of the insertion cylinder (18). The nozzle (17) penetrates through the rotating ring (13) and extends to the inner side of the rotating ring (13). Spray holes (1701) are formed at the inner end of the nozzle (17) and are distributed in a circumferential pattern.

5. A spray device for air pollution prevention and control according to claim 1, characterized in that, A filter screen (5) is fixedly connected to the inlet end of the air blower cylinder (4). The blower includes an impeller (6) arranged inside the filter screen (5). The impeller (6) is fixedly connected to the output shaft of a first motor (7). The first motor (7) is fixed to the outer wall of the filter screen (5). The first motor (7) is electrically connected to the controller.

6. The spray device for air pollution prevention and control according to claim 1, characterized in that, The air blower cylinder (4) is fixedly connected to the vehicle body (1) through an adjustment platform (11). The adjustment platform (11) includes a hinge rod (1101) fixedly connected to the air blower cylinder (4). The lower end of the hinge rod (1101) is hinged to a rotating shaft (1102). The hinge rod (1101) is fixedly connected to the output shaft of a second motor (1103). The second motor (1103) is fixedly connected to the rotating shaft (1102). The lower end of the rotating shaft (1102) is rotatably connected to a base (1104) fixedly connected to the vehicle body (1). A third motor (1105) is fixedly connected inside the base (1104). The output shaft of the third motor (1105) is fixedly connected to the lower end of the rotating shaft (1102). Both the second motor (1103) and the third motor (1105) are electrically connected to the controller.

7. The spray device for air pollution prevention and control according to claim 1, characterized in that, A negative ion generator (26) is fixedly connected inside the air blower cylinder (4). The negative ion generator (26) is used to ionize the air flow passing through the air blower cylinder (4) to generate an ionized air flow. The negative ion generator (26) is electrically connected to the controller.

8. The spray device for air pollution prevention and control according to claim 2, characterized in that, The heating sleeve (27) is fixedly connected to the air blower cylinder (4) through a fixing rod (29). A temperature sensor (32) is fixedly connected to the annular tube (21). Both the temperature sensor (32) and the heating wire (28) are electrically connected to the controller.

9. The spray device for air pollution prevention and control according to claim 5, characterized in that, A sleeve (30) fixedly connected to the filter screen (5) is sleeved outside the first motor (7). A closed annular cavity is formed by enclosing the sleeve (30), the filter screen (5), and the first motor (7). A heat exchange tube (31) sleeved outside the first motor (7) is arranged inside the annular cavity. The heat exchange tube (31) is fixedly connected and communicated with the infusion tube (9).

10. The spray device for air pollution prevention and control according to claim 1, characterized in that, When adjusting the droplet size, the following steps are included: Step 1, start the electric push rod (19) to retract it. The electric push rod (19) drives the insertion cylinder (18) to disengage from the current nozzle (17), and then turn off the electric push rod (19); Step 2, start the fourth motor (16). The rotating ring (13) drives the nozzle group to rotate in a circle, so that the nozzle (17) meeting the aperture requirement moves to the relative position of the insertion cylinder (18), and then turn off the fourth motor (16); Step 3, start the electric push rod (19) again to extend it, so that the insertion cylinder (18) is inserted into the nozzle (17) meeting the aperture requirement; Step 4, after the adjustment is completed, start the water pump (10) and the fan of the air blast cylinder (4) so that the atomized droplets after the particle size adjustment are ejected. When the atomized droplets pass through the detection cylinder (23), start the laser particle size analyzer (25) to monitor the particle size of the generated atomized droplets. When the detected particle size of the atomized droplets does not meet the requirements, the controller issues a warning through the alarm module.

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