Air-assisted spraying device

Abstract

The invention relates to the technical field of fog gun machines, in particular to an air-assisted spraying device which comprises a gun barrel, the axis direction of the gun barrel serves as the front-back direction, a motor is arranged at the rear end of the gun barrel, an output shaft of the motor is coaxially connected with an impeller, the impeller is arranged on the front side of the motor, and the rear side of the motor serves as an air inlet end. Two or three or four fan blades are evenly distributed in the circumferential direction of the impeller, all the fan blades can avoid the support in the front-back direction at the same time, and the gun barrel comprises a two-layer structure of an inner side wall and an outer side wall. When the air-assisted spraying device is used, on the premise that the range is guaranteed, the motor power is reduced, the cost is reduced, funds are saved, and meanwhile noise is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fog cannons, and in particular to an air-conveying spray device. Background Art

[0002] A fog cannon is a dust suppression device used to reduce air pollution. The spray device of the fog cannon can spray out fine water mist. The fan installed in the fog cannon is used to blow the water mist to a distant place to absorb dust particles suspended in the air, reduce the concentration of particulate matter in the air, and achieve the effect of suppressing dust and cleaning the air. It is often used in construction sites, transportation ports, mineral mining and other dusty work environments.

[0003] A Chinese patent document with authorization announcement number CN110681506B discloses a sanitation vehicle and a fog cannon, which includes a wind tube having an air inlet at the rear end and an air outlet at the front end, a guide column and a fan being fixed in the wind tube, and an atomizing nozzle being provided on the wind tube, the mist outlet position of the atomizing nozzle being located within the outer contour of the air outlet column of the wind tube, an air outlet being provided on the rear end face of the guide column, an air inlet being provided on the circumferential surface and / or the front end face of the guide column, the air inlet being connected to the air outlet to form an airflow compensation channel for part of the airflow to pass through, which can compensate the airflow at the rear end face of the guide column where no airflow was originally ejected, thereby reducing the pressure gradient at that place, reducing the high-speed airflow in the annular space between the guide column and the wind tube from gathering and refluxing toward the rear end face of the guide column, and increasing the uniformity of the airflow at the wind tube outlet.

[0004] The above-mentioned fog cannon has a large power when in use, resulting in large energy consumption. The power of the fog cannon is proportional to the air volume and wind pressure. The air volume is proportional to the rotation speed of the fan blades. The greater the rotation speed of the fan blades, the greater the water mist can be sprayed to a sufficient distance. The greater the rotation speed of the fan blades, the greater the air volume. The greater the air volume, the greater the power, and the greater the energy consumption. At the same time, the above-mentioned blades are arranged on the side of the motor close to the air inlet end. Even if the blades are easy to disassemble when damaged, the noise is relatively large and it is easy to generate a lot of noise. Summary of the invention

[0005] The invention provides an air-conveying spray device to solve the technical problems of large energy consumption and high noise of the existing fog cannon device during use.

[0006] In order to solve the above problems, the present invention provides an air-conveying spray device adopting the following technical solutions: A wind-blown spray device comprises a barrel, with the axial direction of the barrel as the front-to-back direction, a motor being arranged at the rear end of the barrel, an impeller being coaxially connected to the output shaft of the motor and arranged at the front side of the motor, the rear side of the motor being the air inlet end, two, three or four fan blades being evenly distributed in the circumferential direction of the impeller, each fan blade being able to avoid a bracket in the front-to-back direction at the same time, and the barrel comprising a two-layer structure of an inner wall and an outer wall.

[0007] The beneficial effect is that when the air-conveying spray device of the present invention is used, the work done by the blades on the air is reduced by reducing the number of blades, thereby reducing the generated wind pressure. At this time, even if the rotation speed is increased to increase the range of the fog cannon, the power can be reduced due to the reduced wind pressure; at the same time, the blades are arranged at the front end of the motor so that the blades are in the middle of the barrel, so that the silencing effect is better and the noise is reduced. When the air-conveying spray device of the present invention is used, the motor power is reduced while ensuring the range, reducing costs and saving money, while reducing noise. At the same time, the number of blades is reduced to 4 or less. Under the same diameter, the fewer the number of blades, the larger the spacing between adjacent blades. This spacing can avoid the installation components of the motor. When the blades are damaged, they can be taken out of the wind tube as a whole, which is convenient for maintenance.

[0008] Furthermore, an inverted U-shaped bracket is provided at the rear end of the barrel, and the motor is detachably connected to the bracket.

[0009] Beneficial effect: facilitates maintenance of the motor.

[0010] Furthermore, two mounting pieces are provided on the bracket, and the two mounting pieces correspond to the two legs of the motor one by one, and the legs of the motor are bolted together with the corresponding mounting pieces.

[0011] Beneficial effects: simple structure, stable connection, easy to install and remove the motor.

[0012] Furthermore, the number of the fan blades is four.

[0013] Furthermore, four slots are provided on the impeller, and blocks adapted to the slots are provided on the blades. The four blades correspond to the four slots one by one, and the blocks are bolted to the corresponding slots.

[0014] Beneficial effect: The stability of the connection between the impeller and the fan blades is improved, and at the same time, when the fan blades are damaged, it is easy to repair and avoid the fan blades from breaking due to long-term use.

[0015] Furthermore, the motor is a two-stage motor.

[0016] Beneficial effects: high rotation speed, increasing the range of the fog cannon.

[0017] Furthermore, the space between the inner wall and the outer wall is filled with sound-absorbing cotton, and a sound-absorbing hole is also opened on the inner wall of the barrel.

[0018] Beneficial effects: Silencing the inside of the barrel, reducing noise and reducing the weight of the barrel.

[0019] Furthermore, a rib plate is provided between the inner wall and the outer wall, and the rib plate is used to connect the inner wall and the outer wall together.

[0020] Beneficial effect: Improve the stability between the inner wall and the outer wall and avoid the collapse of the outer wall.

[0021] Furthermore, the inner wall and the outer wall of the barrel are integrally formed.

[0022] Beneficial effect: Improve stability and avoid loosening of the connection between the front and rear ends of the barrel.

[0023] Furthermore, a connecting tube is provided on the front side of the fan blade, and eight wind guide plates are evenly distributed in the circumferential direction of the connecting tube, and the ends of the wind guide plates away from the connecting tube are connected to the barrel.

[0024] Beneficial effects: The structure is simple and convenient for supporting the barrel, and the wind guide plate can make the wind blown forward be blown out in a straight line. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 It is a structural schematic diagram of an air-conveying spray device of the present invention; Figure 2 A cross-sectional view of an air-conveying spray device of the present invention; Figure 3 It is a schematic diagram of the internal structure of an air-conveying spray device of the present invention; Figure 4 A cross-sectional view of an air-conveying spray device of the present invention; Figure 5 for Figure 4 Enlarged schematic diagram at point A in the middle.

[0026] Figure 6 for Figure 2 The enlarged schematic diagram of point B in the middle; Figure 7 It is a structural schematic diagram of a rib plate of an air-conveying spray device of the present invention; Figure 8 for Figure 7 The enlarged schematic diagram at C in the middle; Fig. 9 The present invention is a schematic diagram of the structure of a spray pipe of an air-conveying spray device.

[0027] Description of reference numerals: 1. Barrel; 2. Motor; 3. Impeller; 4. Air inlet; 5. Blade; 6. Bracket; 7. Slot; 8. Block; 9. Silencer; 10. Silencer hole; 11. Rib plate; 12. Connecting tube; 13. Wind guide plate; 14. First slope section; 15. Second slope section; 16. Third slope section; 17. Fourth slope section; 18. Upper fixing groove; 19. Lower fixing groove; 20. Inner fixing plate; 21. Outer fixing plate; 22. Inner wall; 23. Outer wall; 24. Mounting parts; 25. Spray pipe; 26. Atomizing nozzle. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

[0030] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0031] Embodiment 1 of an air-conveying spray device provided by the present invention: like Figures 1 to 9 As shown, an air-conveying spray device of the present invention comprises a barrel 1, a motor 2 and a connecting barrel 12. The axial direction of the barrel 1 is defined as the front-to-back direction, the rear end of the barrel 1 is the air inlet end 4, the front end of the barrel 1 is the air outlet, and a spray pipe 25 is provided at the front end of the barrel 1, and three circles of atomizing nozzles 26 are connected to the spray pipe 25. One end of the barrel 1 close to the spray pipe 25 is set as a bell mouth, and the spray pipe 25 is arranged in a ring shape at the end face of the bell mouth, and a ventilation duct is arranged between the spray pipe 25 and the inner wall of the bell mouth, and the three circles of atomizing nozzles 26 are respectively an inner circle nozzle, a middle nozzle and an outer circle nozzle, and the inner circle nozzle is arranged to be inclined toward the center of the bell mouth, and the angle between the inner circle nozzle and the axial direction of the barrel 1 is 30 degrees.

[0032] The outer ring nozzle is tilted away from the center of the bell mouth, and the angle between it and the axis direction of the barrel 1 is 30 degrees.

[0033] In this embodiment, the inclination direction of the outer ring nozzle is parallel to the inner wall of the bell mouth.

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the barrel 1 includes a two-layer structure of an inner wall 22 and an outer wall 23 , and silencer cotton 9 is filled between the inner wall 22 and the outer wall 23 . A silencer hole 10 is also opened on the inner wall 22 of the barrel 1 .

[0035] In order to ensure the stability of the connection between the inner wall 22 and the outer wall 23 , a rib plate 11 is provided between the inner wall 22 and the outer wall 23 , and the rib plate 11 is used to connect the inner wall 22 and the outer wall 23 together.

[0036] like Figure 6 , Figure 7 and Figure 8 As shown, the outer side surface of the rib plate 11 includes a first bevel section 14, a second bevel section 15, and a third bevel section 16 arranged in sequence from front to back, the first bevel section 14 is arranged upwardly inclined from front to back, the second bevel section 15 is arranged horizontally, and the third bevel section 16 is arranged downwardly inclined from front to back. The rear end surface of the rib plate 11 is a fourth bevel section 17, and the fourth bevel section 17 intersects with the rear end of the third bevel section 16 so that the rear end of the rib plate 11 is a pointed end. The front and rear sides of the second bevel section 15 are provided with an upper fixing groove 18, and the lower end surface of the rib plate 11 is provided with a lower fixing groove 19; the outer side of the inner side wall 22 is provided with an inner fixing plate 20 adapted to the lower fixing groove 19, and the inner side of the outer side wall 23 is provided with an outer fixing plate 21 adapted to the upper fixing groove 18, and the outer side wall 23 is formed integrally.

[0037] An inverted U-shaped bracket 6 is provided at the rear end of the barrel 1. Two mounting members 24 are provided on the bracket 6. The mounting members 24 are U-shaped structures, and the openings of the two mounting members 24 are arranged opposite to each other in the left-right direction.

[0038] The motor 2 is a two-stage motor. The two legs of the motor 2 are arranged in a one-to-one correspondence with the two mounting parts 24, and the two legs of the motor 2 are detachably connected to the two mounting parts 24 by bolts. The output shaft of the motor 2 extends in the front-to-back direction, and the output shaft of the motor 2 is arranged on the front side of the motor 2.

[0039] like Figure 4 and Figure 5 As shown, the impeller 3 is coaxially connected to the output shaft of the motor 2, and four slots 7 are evenly distributed in the circumferential direction of the impeller 3. Four blades 5 are also connected in the circumferential direction of the impeller 3, and each blade 5 is connected with a block 8 adapted to the slot 7. The blocks 8 of the four blades 5 correspond to and adapt to the four slots 7 one by one. The blocks 8 are inserted into the corresponding slots 7 on the impeller 3 and are detachably connected to the impeller 3 by bolt connection.

[0040] The connecting tube 12 is arranged at the front side of the fan blade 5 , and eight air guide plates 13 are evenly distributed in the circumferential direction of the connecting tube 12 . One end of the air guide plate 13 away from the connecting tube 12 is fixedly connected to the inner wall 22 of the barrel 1 .

[0041] When the air-blow spray device of the present invention is in use, the number of the fan blades 5 is reduced, thereby reducing the work done by the fan blades 5 on the air, thereby reducing the generated wind pressure. At this time, even if the rotation speed is increased to increase the range of the fog cannon, the power can also be reduced due to the reduced wind pressure; at the same time, the fan blades 5 are arranged at the front end of the motor 2 so that the fan blades 5 are in the middle section of the barrel 1, thereby achieving a better silencing effect and reducing noise.

[0042] When the air-conveying spray device of the present invention is used, the motor power is reduced while the spray range is guaranteed, the cost is reduced, funds are saved, and the noise is reduced.

[0043] Embodiment 2 of an air-conveying spray device provided by the present invention: The main difference between it and Example 1 is that in Example 1, an inverted U-shaped bracket is provided at the rear end of the barrel, and the motor is detachably connected to the bracket.

[0044] In this embodiment, a plurality of connecting plates are provided in the circumferential direction of the motor, and one end of each connecting plate away from the motor is detachably connected to the inner wall of the barrel.

[0045] Embodiment 3 of an air-conveying spray device provided by the present invention: The main difference between it and Example 1 is that in Example 1, the motor is connected to the bracket by using bolts.

[0046] In this embodiment, a first connecting plate is arranged at the bottom of the motor, a first through hole is opened on the first connecting plate, a second connecting plate is arranged at the upper end of the bracket, a second through hole is opened on the second connecting plate, and the first connecting plate and the second connecting plate are pinned together through the first through hole and the second through hole.

[0047] Embodiment 4 of an air-conveying spray device provided by the present invention: The main difference between it and Example 1 is that in Example 1, the number of fan blades is four.

[0048] In this embodiment, three fan blades are provided.

[0049] Embodiment 5 of an air-conveying spray device provided by the present invention: The main difference between it and Example 1 is that in Example 1, four slots are opened on the impeller, and the fan blades are provided with blocks adapted to the slots. The four fan blades correspond to the four slots one by one, and the blocks are connected to the corresponding slots by bolts.

[0050] In this embodiment, no slot is provided on the impeller, and the fan blades are tightly attached to the rear side of the impeller and are detachably connected together by bolts.

[0051] Embodiment 6 of an air-conveying spray device provided by the present invention: The main difference between it and Example 1 is that in Example 1, the barrel includes a two-layer structure of an inner wall and an outer wall, the inner wall and the outer wall are filled with sound-absorbing cotton, and a sound-absorbing hole is also opened on the inner wall of the barrel.

[0052] In this embodiment, the barrel is a single-layer structure and a silencer hole is provided on the barrel.

[0053] Embodiment 7 of an air-conveying spray device provided by the present invention: The main difference between it and Example 1 is that in Example 1, a rib plate is provided between the inner wall and the outer wall, and the rib plate is used to connect the inner wall and the outer wall together.

[0054] In this embodiment, the front and rear ends of the inner wall and the outer wall are welded together.

[0055] Embodiment 8 of an air-conveying spray device provided by the present invention: The main difference between it and Example 1 is that: in Example 1, the fan blades are connected with blocks that are adapted to the slots, the blocks of the four fan blades correspond to and adapt to the four slots one by one, and the blocks are inserted into the corresponding slots on the impeller and are detachably connected to the impeller by bolts.

[0056] In this embodiment, the fan blade includes a first blade segment and a second blade segment. The first blade segment is arranged closer to the root of the fan blade relative to the second blade segment. The first blade segment and the second blade segment respectively have a first connecting surface and a second connecting surface that are relatively arranged. The chord length of the blade wing section at the second connecting surface is smaller than the chord length of the blade wing section at the first connecting surface.

[0057] The blade airfoil section refers to the cross section of the blade perpendicular to the leading edge of the blade.

[0058] In this embodiment, since the chord length of the blade wing section at the second connecting surface is smaller than the chord length of the blade wing section at the first connecting surface, the force area of ​​the blade end at the second connecting surface is smaller than the force area of ​​the blade end at the first connecting surface, which can reduce the force difference generated at the connection between the two blade segments, thereby reducing the accumulation of stress damage and increasing the service life of the blade.

[0059] The chord length of the blade airfoil section of the second blade segment gradually decreases in a direction away from the first blade segment.

[0060] Since the lift coefficient of the blade gradually increases as it moves away from the blade root, reducing the chord length can reduce the force-bearing area of ​​the blade segment, thereby ensuring that the blade segment maintains a certain deceleration rate in the entire swept wind area, ensuring that the airflow through the blade does not pass too slowly to generate turbulence, and at the same time does not pass too quickly to cause energy waste.

[0061] The fan blade also includes an isolating member, which is arranged between the first blade segment and the second blade segment, and is used to isolate the airflow generated by the first blade segment and the second blade segment.

[0062] Providing an isolation piece can separate the airflow generated by the first blade segment and the second blade segment, thereby reducing the influence of discontinuity phenomenon caused by geometric and aerodynamic discontinuities on the aerodynamic performance of the airfoil at the connection between the first blade segment and the second blade segment, and can make the aerodynamic performance of the first blade segment and the second blade segment be designed separately at the segmentation point without affecting each other, which not only saves design time and cost, but also avoids the loss of aerodynamic performance of the blades at the connection between the blade segments.

[0063] The fan blade also includes a plurality of connection components, which are arranged along the circumference of the outer edge of the second connection surface and fix the second blade segment on the first connection surface.

[0064] Since the chord length of the blade wing section at the second connecting surface is smaller than the chord length of the blade wing section at the first connecting surface, according to the design specifications of the fan blade, the outer edge of the second connecting surface is located on the inner side of the outer edge of the first connecting surface, and the connecting component is arranged circumferentially along the outer edge of the second connecting surface to facilitate installation and maintenance of the blade segment connections.

[0065] The fan blade also includes an anti-shear prism, the two ends of which are respectively located in the first blade segment and the second blade segment, and the opposite sides of the anti-shear prism are respectively fixed to the leading edge web and the trailing edge web in the fan blade. The anti-shear prism can enhance the anti-shear rigidity of the fan blade segment to prevent the fan blade from breaking.

[0066] The anti-shear prism is fixed to the connecting end surfaces of the leading edge web and the trailing edge web in the first blade segment and the second blade segment by multiple positioning pins, which can reinforce the anti-shear prism and prevent damage to the inner wall of the blade caused by the insecure fixation of the anti-shear prism.

[0067] In this embodiment, elastic fillers are provided between the side surfaces of the anti-shear prism relative to the windward surface and the leeward surface of the blade and the inner wall surface of the blade.

[0068] The elastic filler can not only provide a buffer between the inner wall surface of the blade and the anti-shear prism, but also avoid damage to the inner wall surface of the blade.

[0069] The elastic filler is arranged on the end surface of the anti-shear prism closer to the inner wall surface of the blade, and the material type of the elastic filler is set according to the requirements of the blade manufacturing process.

[0070] In this embodiment, the anti-shear prism is a cuboid, and the length of the anti-shear prism in the chord direction of the blade is smaller than the length in the thickness direction of the blade, which can further enhance the anti-shear stiffness at the blade segment.

[0071] The ratio of the length of the cross-section of the shear prism in the span direction of the blade in the chord direction of the airfoil to the length in the thickness direction of the airfoil is deduced based on the shear stiffness required at the first blade segment and the second blade segment during the blade structure design process and the shear stress on the stud bolts of the connecting components. The sum of the shear stress on the shear prism and the shear stress on the stud bolts of multiple connecting components should meet the blade structure design requirements.

[0072] Embodiment 9 of an air-conveying spray device provided by the present invention: The main difference between it and Example 1 is that in Example 1, a connecting tube is further provided on the front side of the fan blade, and eight wind guide plates are evenly distributed in the circumferential direction of the connecting tube, and the ends of the wind guide plates away from the connecting tube are connected to the barrel.

[0073] In this embodiment, no connecting tube is provided, and four air guide plates are provided. The air guide plates extend along the inner diameter direction of the barrel and are connected to the barrel at both ends.

[0074] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0075] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

[0076] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A pneumatic spray device, characterized in that: It includes a gun barrel, with the axial direction of the gun barrel as the front-to-back direction, a motor is provided at the rear end of the gun barrel, an impeller is coaxially connected to the output shaft of the motor and the impeller is provided at the front side of the motor, the rear side of the motor is the air inlet end, two, three or four fan blades are evenly distributed in the circumferential direction of the impeller, and each fan blade can avoid the bracket in the front-to-back direction at the same time, and the gun barrel includes a two-layer structure of an inner wall and an outer wall.

2. The air-conveying spray device according to claim 1, characterized in that: An inverted U-shaped bracket is arranged at the rear end of the barrel, and the motor is detachably connected to the bracket.

3. The air-conveying spray device according to claim 2, characterized in that: The bracket is provided with two mounting pieces, which correspond to the two legs of the motor one by one, and the legs of the motor are bolted together with the corresponding mounting pieces.

4. The air-conveying spray device according to claim 3, characterized in that: The fan blades are provided with four.

5. The air-conveying spray device according to claim 4, characterized in that: The impeller is provided with four slots, the fan blades are provided with blocks adapted to the slots, the four fan blades correspond to the four slots one by one, and the blocks are connected together with the corresponding slots by bolts.

6. An air-conveying spray device according to any one of claims 1 to 5, characterized in that: The motor is a two-stage motor.

7. An air-conveying spray device according to any one of claims 1 to 5, characterized in that: The space between the inner wall and the outer wall is filled with sound-absorbing cotton, and a sound-absorbing hole is also provided on the inner wall of the barrel.

8. The air-conveying spray device according to claim 7, characterized in that: A rib plate is provided between the inner wall and the outer wall, and the rib plate is used to connect the inner wall and the outer wall together.

9. The air-conveying spray device according to claim 7, characterized in that: The inner wall and the outer wall of the barrel are integrally formed.

10. An air-conveying spray device according to any one of claims 1 to 5, characterized in that: A connecting tube is also provided on the front side of the fan blade, and eight wind guide plates are evenly distributed in the circumferential direction of the connecting tube. The ends of the wind guide plates away from the connecting tube are connected to the barrel.

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