Road surface cleaning vehicle

Abstract

The invention relates to the technical field of road surface cleaning vehicles, in particular to a road surface cleaning vehicle which comprises a cleaning and sweeping vehicle, a central control system, a water tank, a garbage can and a sucker, the central control system is mounted at the front end of the cleaning and sweeping vehicle, the water tank is mounted at the rear end of the central control system, the garbage can is mounted at the rear end of the water tank, and a cleaning disc is mounted at the lower end of the garbage can. The cleaning and sweeping vehicle is characterized by further comprising a brush disc, the brush disc is installed at the lower end of the water tank and inclines towards the interior of the bottom of the cleaning and sweeping vehicle through a plurality of nozzles, and air sprayed out of the inclined nozzles forms an air wall to gather garbage thrown out of the cleaning and sweeping vehicle driven by rotating force of the brushes in a heap. The air wall formed by the inclined nozzles is favorable for gathering garbage thrown from the outside of the cleaning and sweeping vehicle, the mechanism guides the garbage to the middle by utilizing airflow, the cleaning effect is improved, the cleaning process is more efficient, scattered garbage in the environment can be reduced by collecting the garbage in a centralized manner, and the cleanness of the urban environment can be maintained.

Description

Technical Field

[0001] This invention relates to the field of road cleaning vehicle technology, and specifically to a road cleaning vehicle. Background Technology

[0002] A sweeper truck is a type of road cleaning vehicle. Based on their working principle, they can be divided into vacuum sweeper trucks and vacuum cleaning trucks. Vacuum sweeper trucks, due to their large suction cup area and insufficiently concentrated suction power, are not ideal for cleaning large-diameter sand and gravel, as well as sticky garbage. Vacuum sweeper trucks, on the other hand, first collect garbage in the middle of the vehicle using a brush to form a garbage belt, which is then forcefully sucked into the garbage bin by the suction cup. This method utilizes the ground pressure and rotation of the brush to effectively clean sticky garbage. Furthermore, the small suction cup opening and concentrated suction power effectively draw large-diameter sand and gravel into the garbage bin. Therefore, in areas where raw materials such as building materials and chemicals are transported, vacuum sweeper trucks provide better cleaning results than vacuum sweeper trucks.

[0003] As a crucial working device of a vacuum sweeper, the correct adjustment of the brush disc plays a vital role in the sweeping effect. The speed and direction of the brush bristle contact point are important factors affecting the performance of the brush disc. Its magnitude determines the dust particle's throwing speed and distance under the action of the bristles. The brush disc rotates towards the center of the sweeper, that is, in the direction of travel, the left brush disc rotates clockwise and the right brush disc rotates counterclockwise, sweeping the garbage towards the center of the sweeper and forming a garbage band on the left and right sides of the bottom of the sweeper, which is then sucked into the garbage bin by the suction cup. When the speed of the brush disc is too low, the absolute speed and inward tilt angle of the brush contact point will be small, causing the dust particles to be thrown inward for a shorter distance, remaining near the brush disc and causing secondary throwing, increasing power loss and bristle wear, and even posing a safety hazard of the brush disc carrying sand and gravel that could injure pedestrians on the roadside.

[0004] However, in road sections where raw materials such as building materials and chemicals are frequently transported and a large amount of industrial waste such as crushed sand and gravel falls, the cleaning efficiency of the sweeper truck will be significantly reduced due to the excessive amount of industrial waste falling during the cleaning process. Therefore, it is necessary to clean the road repeatedly, and even to cooperate with manual cleaning to clean it completely, which leads to a deterioration in the use effect of the road cleaning truck.

[0005] In view of the above, in order to overcome the above technical problems, the present invention designs a road cleaning vehicle, which solves the above technical problems. Summary of the Invention

[0006] The technical objective of this invention is as follows: In the road cleaning vehicle provided by this invention, the nozzle is connected to the exhaust port of the suction fan through an air pipe, and a portion of the air discharged by the suction fan is introduced into the air pipe and then sprayed out through the nozzle to form an "air wall" to intercept the garbage thrown out of the sweeper due to the increased rotation speed of the brush disc, thus avoiding the reverse cleaning effect of dust flying.

[0007] To achieve the above-mentioned technical objectives, the present invention provides the following technical solution:

[0008] This invention provides a road cleaning vehicle, comprising a sweeper, a central control system, a water tank, a garbage bin, a suction cup, and a brush disc. The central control system is installed at the front end of the sweeper, a water tank is installed at the rear end of the central control system, a garbage bin is installed at the rear end of the water tank, a suction cup is installed at the lower end of the garbage bin, and a brush disc is installed at the lower end of the water tank. The brush disc, through the horizontal movement of a support rod, drives the nozzles to tilt towards the center, and the tilting nozzles, through the rotational force of the brushes, move the external garbage towards the center.

[0009] The air wall created by the angled nozzles helps to collect trash thrown from the outside of the sweeper. This mechanism improves cleaning efficiency by using airflow to guide trash to the center, making the cleaning process more efficient. Collecting trash centrally reduces litter in the environment, helping to maintain urban cleanliness. Furthermore, centralized trash storage facilitates subsequent waste disposal and recycling, contributing to the effective use of resources. The synergy between the brushes and the angled nozzles enhances cleaning effectiveness. The brushes clean the bottom of the sweeper, while the angled nozzles guide trash by forming an air wall, resulting in a more thorough cleaning. Each brush is equipped with a protective component to prevent the nozzles from rigidly impacting obstacles. Each brush has nozzles, and each nozzle is connected to the exhaust port of the suction fan via an air pipe. The suction fan sucks up trash through the suction nozzles and discharges the sucked-up trash into the trash bin through the exhaust port, enabling the road cleaning truck to not only clean the road surface but also collect trash.

[0010] The brush plate includes a fixed rod, a fixed plate, a fixed frame, a horizontal bar, a diagonal bar, a support rod, a drive motor, and a brush. Fixed rods are installed on both sides of the lower end of the water tank. A fixed plate is installed on the other end of the fixed rod. A fixed frame is installed on the other side of the fixed plate. A horizontal bar is installed on the upper end of the fixed frame. A diagonal bar is installed on the other end of the horizontal bar, and the angle between the horizontal bar and the diagonal bar is an acute angle. A support rod is installed at the center of the diagonal bar. The other end of the support rod is installed on the fixed frame. A drive motor is installed inside the fixed frame. A brush is installed below the drive mechanism.

[0011] The acute angle between the crossbar and the diagonal bar allows the nozzles to more effectively intercept debris thrown from the outside of the sweeper, avoiding the dust-filled backlash during cleaning. With this design, 90%-95% of smaller flying gravel is successfully intercepted, while the remaining 5%-10% has its kinetic energy reduced by approximately 90% by the air wall effect, thus preventing harm to pedestrians and improving cleanliness and safety. The acute angle also makes the brush plate more adaptable to different ground shapes and elevations, ensuring effective cleaning in various road conditions and improving adaptability and flexibility. The nozzles are fixedly installed at the lower end of the diagonal bar, directing the ejected gas towards the center of the sweeper chassis. This creates an air wall and simultaneously blows some industrial waste towards the bottom of the sweeper, effectively intercepting and pushing it towards the nearest garbage belt, enhancing the sweeper's cleaning performance. The support rod is installed at the center of the diagonal bar, providing additional support and stability, reducing vibration and swaying during cleaning, and extending the service life of the brush plate and drive motor. The sharp-angle design and support rod mounting method allow the brush disc to hang better under the vehicle, which helps maintain even cleaning pressure on uneven surfaces and improves cleaning performance.

[0012] The fixed frame has a convex cross-sectional shape, with a hollow structure at the bottom and a slot at the top perpendicular to the hollow structure.

[0013] The convex mounting frame provides higher structural strength and increased overall stability, which is crucial for the brush discs that withstand various forces and vibrations during cleaning. The hollow structure effectively reduces the weight of the entire mounting frame, making the brush discs lighter and improving the maneuverability and flexibility of the cleaning truck. Simultaneously, the hollow structure provides more space for water and debris drainage, preventing water and debris from accumulating inside the frame and thus reducing cleaning time. The convex cross-sectional shape and hollow structure design likely make the mounting frame easier to clean and maintain. The slot at the top allows cleaning truck operators to easily adjust the nozzle position for more stable cleaning of the brush disc area. The convex cross-sectional shape and slot placement of the mounting frame may help guide debris towards the center of the cleaning truck, resulting in a more concentrated and comprehensive cleaning effect. The slot at the top, perpendicular to the hollow structure, helps prevent collisions and interference between the linkage and motor, helping to ensure proper operation of the components.

[0014] An arc plate is installed at the lower end of the inclined rod, and the angle between the inclined rod and the arc plate is a right angle. The cross-sectional shape of the arc plate is a bow shape, and the inner arc side of the arc plate is close to the brush plate.

[0015] The design of the right-angled brace and curved plate provides a superior cleaning angle, allowing the brush disc to better conform to the ground, thus improving cleaning effectiveness, especially on uneven surfaces. The curved plate and right-angled brace may make the brush disc more stable during cleaning, reducing vibration and swaying, and improving cleaning precision, which is particularly crucial for applications requiring precise cleaning. The curved plate design can, to some extent, prevent water and dirt from splashing into the surrounding area, ensuring a cleaner cleaning process while reducing the possibility of cleaning vehicle operators coming into contact with water and dirt. The curved shape of the plate helps to accurately position the brush angle, forming a tighter surrounding arc surface, maximizing the fit of the outer shape of the brush disc, and avoiding airflow interference from adjacent nozzles, which could cause airflow turbulence around the brush disc and affect its normal cleaning operation. The inner curved side of the plate close to the brush disc may help to effectively guide debris and dirt generated during cleaning to the brush disc area for concentrated cleaning. The right-angled connection may increase the structural strength of the brace and curved plate, contributing to the stability and durability of the brush disc.

[0016] A water pipe is installed above the arc plate, and a nozzle is installed at the lower end of the water pipe. The nozzles are arranged alternately on the arc plate, and adjacent nozzles are not on the same circumferential plane.

[0017] The nozzles are staggered on the arc plate, with adjacent nozzles not on the same circumferential plane, avoiding mutual cancellation and interference of gas from multiple nozzles. This design allows the air sprayed from multiple nozzles to overlap, forming a more tightly enveloping arc surface. The staggered arrangement of the nozzles ensures that the water flow evenly covers the entire cleaning area, helping to improve the uniformity of cleaning and avoid missed areas and inadequate cleaning. The nozzles arranged on different circumferential planes allow the water flow to spray in multiple directions, achieving a comprehensive cleaning effect and increasing the adaptability of the cleaning vehicle to different road conditions and sites. The staggered arrangement of the nozzles reduces the impact of adjacent water flows, reducing the impact force of the water flow on the cleaning vehicle and the cleaning area, which helps to improve the stability and durability of the equipment. In addition, the staggered arrangement reduces the concentration of water flow, thereby reducing the possibility of water splashing into the surrounding area and maintaining a clean cleaning process. Through precise water flow control, not only can the cleaning effect be guaranteed, but water resources can also be saved more effectively, which is in line with the principles of energy conservation and environmental protection.

[0018] Each nozzle can be divided into a contraction section and an expansion section. That is, the internal shape of each nozzle is a contraction-expansion shape. The front part is from large to small and then contracts towards the middle to a narrow throat. After the narrow throat, it expands outward from small to large to the nozzle opening. The diameter values ​​of the nozzle inlet and outlet cross sections are the same, and the length values ​​of the contraction section and the expansion section are equal.

[0019] The design of the contraction section allows the water flow to form a high-speed flow at the narrow throat, increasing the water velocity and thus enhancing the cleaning impact and effect, especially when water-based cleaning of roads is required. The design of the expansion section allows the water flow to expand from the narrow throat to a larger cross-section, achieving uniform spraying at the nozzle orifice. This helps maintain the uniformity of the water flow, avoids localized water concentration, and increases the cleaning coverage area. The nozzle orifice cross-sectional diameter is the same, and the lengths of the contraction and expansion sections are approximately equal, which helps reduce the resistance of the water flow through the nozzle. This design improves the stability of the water flow, reduces fluctuations, and helps maintain consistent cleaning. The design of the contraction and expansion sections may also reduce the risk of nozzle clogging, as clogging is less likely to occur in a changing structure, thus improving the reliability and stability of the equipment. After the narrow throat, the water flow expands outward from the nozzle orifice, gradually increasing in size. Gas inside the nozzle flows into the front half of the nozzle under high pressure, passes through the narrow throat, and escapes from the rear half. Under the same pressure, the gas is compressed after passing through the narrow throat, creating an acceleration effect, with the flow velocity reaching 2-3 times that of before. This not only increases the flow rate from the nozzles without requiring additional power from the suction fan, but also enhances the ability to intercept industrial waste and reduces the kinetic energy of the ejected sand and gravel. This helps avoid the reactive cleaning caused by flying dust and reduces the risk of injury from flying sand and gravel.

[0020] The front end of the support rod has a rectangular groove, and the side of the support rod has an elliptical groove.

[0021] The presence of rectangular and elliptical grooves increases the cross-sectional area of ​​the support rod, thereby improving its structural strength. This helps support components such as the brush plate, making the cleaning truck more stable and durable during use. Despite the increased structural strength, with proper design, the grooves can reduce the overall weight of the support rod, contributing to improved maneuverability and ease of operation. Rectangular grooves allow for stable movement of the inclined rod while providing stability during liquid flow within the water pipe, preventing damage to the nozzles. Furthermore, the grooves provide stable cushioning, preventing vibration-induced instability of the air wall and ensuring consistent cleaning and interception of debris and dust. The grooves also increase the surface area of ​​the support rod to some extent, helping to improve its resistance to lateral and longitudinal vibrations, thus enhancing the stability of the cleaning truck during operation.

[0022] Each air pipe is equipped with a rectifier near the nozzle. The rectifier has a rectifying fluid on the parallel bisector of its inner axis, and the cross-sectional shape of the rectifying fluid is teardrop-shaped. The rectifier has two air inlets on the opposite side that match the upper and lower surfaces of the rectifying fluid.

[0023] The teardrop-shaped rectifier within the rectifier effectively slows down the airflow, making it more stable. This helps prevent drastic airflow fluctuations and improves the consistency of cleaning results near the nozzles. By slowing the airflow, the rectifier helps reduce airflow resistance to the nozzles, improving nozzle efficiency, reducing energy consumption, and making the cleaning vehicle more energy-efficient. The teardrop-shaped rectifier optimizes the airflow direction, ensuring a more even distribution of airflow to the nozzles. This helps avoid localized airflow concentration and improves cleaning uniformity. Two air inlets on the rectifier's reverse-flow side, which mate with the upper and lower surfaces of the rectifier, cause the gas to impact the pipe wall during flow, creating turbulence, reducing flow velocity, and decreasing the interception force of the gas at the nozzles. After passing through the rectifier, the gas becomes essentially a completely laminar flow, improving the interception force of a single nozzle on industrial waste and the interception force of an air wall formed by multiple nozzles. The air inlets on the reverse-flow side allow the airflow to pass through the rectifier more effectively, reducing the interference of wind direction on the rectification effect and helping to maintain cleaning stability under different wind conditions. By optimizing the airflow rectification effect, the overall cleaning effect of the cleaning truck has been improved. The stable airflow at the nozzles helps to ensure that the water is sprayed evenly, increasing the cleaning coverage area and comprehensiveness.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention designs a brush disc that intercepts garbage thrown out of the sweeper due to the increased rotation speed of the brush disc, avoiding the counterproductive cleaning caused by dust flying around. 90%-95% of the smaller sand and gravel flying out will be intercepted by the air wall, and the remaining 5%-10% of the flying sand and gravel will have about 90% of its kinetic energy reduced by the "air wall" to avoid injuring pedestrians on the roadside. At the same time, it improves the cleanliness and safety of the sweeper.

[0026] 2. This invention designs a horizontal bar and an oblique bar with an acute angle between them, meaning the nozzle faces inward toward the chassis of the sweeper truck. During the gas ejection process, the nozzle intercepts industrial waste flying outward toward the sweeper truck, and simultaneously blows industrial waste around the brush plate toward the bottom of the sweeper truck onto the waste belt, thus improving the cleaning efficiency of the sweeper truck.

[0027] 3. This invention designs a nozzle with an internal shape that first contracts and then expands, allowing gas to be compressed and ejected as it passes through. This enhances the flow velocity under the same pressure. Furthermore, a rectifier is installed inside the nozzle. Gas enters the rectifier from two air inlets, and after passing through the rectifier gap between the air inlet and the air pipe wall and the rectifier fluid, the turbulent gas becomes completely laminar gas. As a result, the gas ejected from the nozzle exhibits a laminar flow state, that is, the ejected gas velocity increases, thereby improving the interception force of the air wall formed by the gas ejected from multiple nozzles. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0030] Figure 1 This is an overall schematic diagram of the invention;

[0031] Figure 2 This is a schematic diagram of the suction cup of the present invention;

[0032] Figure 3 This is a side view of the suction cup of the present invention;

[0033] Figure 4 This is a schematic diagram of the fixing frame of the present invention;

[0034] Figure 5 This is a schematic diagram of the water pipe and nozzle of the present invention;

[0035] Figure 6 This is a schematic diagram of the support rod of the present invention.

[0036] In the diagram: 1. Sweeper truck; 2. Central control system; 3. Water tank; 4. Garbage bin; 5. Suction cup; 6. Brush plate; 61. Fixing rod; 62. Fixing plate; 63. Fixing frame; 64. Crossbar; 65. Diagonal bar; 651. Arc plate; 652. Water pipe; 653. Nozzle; 654. Contraction section; 655. Expansion section; 656. Rectifier; 657. Rectifier fluid; 66. Support rod; 661. Rectangular groove; 662. Elliptical groove; 67. Drive motor; 68. Brush. Detailed Implementation

[0037] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0038] like Figure 1As shown, the present invention provides a road cleaning vehicle, including a sweeper truck 1, a central control system 2, a water tank 3, a garbage bin 4, a suction cup 5, and a brush plate 6. The sweeper truck 1 is characterized by having a central control system 2 installed at its front end, a water tank 3 installed at its rear end, a garbage bin 4 installed at its rear end, a suction cup 5 installed at the lower end of the garbage bin 4, and a brush plate 6 installed at the lower end of the water tank 3. The brush plate 6, through the horizontal movement of a support rod 66, drives a nozzle 653 to tilt towards the center. The tilted nozzle 653, in turn, uses the rotational force of a brush 68 to move external garbage towards the center.

[0039] The design of the tilting nozzle 653 helps to form an air wall, effectively concentrating the garbage thrown from the outside of the sweeper truck 1. This mechanism uses airflow to guide the garbage to the center of the vehicle, significantly improving the cleaning effect and making the cleaning process more efficient. By orderly concentrating the garbage, it helps to reduce littering in the environment, thereby maintaining the cleanliness of the urban environment. In addition, centralized garbage storage facilitates subsequent garbage disposal and recycling, promoting the efficient use of resources. The synergy between the brush disc 6 and the tilting nozzle 653 further improves the cleaning effect. The brush disc 6 is located at the bottom of the sweeper truck 1 and is responsible for cleaning the road surface, while the tilting nozzle 653 guides the garbage by forming an air wall, achieving comprehensive cleaning. Each brush disc 6 is equipped with a protective component to prevent the nozzle 653 from rigidly colliding with obstacles. Each nozzle 653 on the brush disc 6 is connected to the exhaust port of the suction fan through an air pipe. The suction fan can both absorb garbage and send it into the garbage bin 4 through the exhaust port, so that the sweeper truck 1 can not only clean the road surface, but also efficiently collect garbage.

[0040] like Figure 2 , 3 As shown in Figure 4, the brush plate 6 includes a fixed rod 61, a fixed plate 62, a fixed frame 63, a horizontal bar 64, a diagonal bar 65, a support rod 66, a drive motor 67, and a brush 68. The fixed rods 61 are installed on both sides of the lower end of the water tank 3. The fixed plate 62 is installed on the other end of the fixed rod 61. The fixed frame 63 is installed on the other side of the fixed plate 62. The horizontal bar 64 is installed on the upper end of the fixed frame 63. The diagonal bar 65 is installed on the other end of the horizontal bar 64, and the angle between the horizontal bar 64 and the diagonal bar 65 is an acute angle. The support rod 66 is installed at the center of the diagonal bar 65. The other end of the support rod 66 is installed on the fixed frame 63. The drive motor 67 is installed inside the fixed frame 63. The brush 68 is installed below the drive mechanism.

[0041] The acute angle between the crossbar 64 and the diagonal bar 65 helps to effectively intercept garbage thrown from the outside of the sweeper truck 1, avoiding the adverse effect of dust flying around. This design allows 90%-95% of smaller gravel to be successfully intercepted, while the remaining 5%-10% loses about 90% of its kinetic energy due to the acute angle, thus preventing harm to pedestrians on the roadside and improving cleanliness and safety. The acute angle also makes the brush disc 6 more adaptable, easily adapting to different terrain shapes and undulations, ensuring effective cleaning under various road conditions and improving the adaptability and flexibility of the cleaning process. The nozzle 653 is fixed to the lower end of the diagonal bar 65, directing the sprayed gas towards the center of the sweeper truck 1 chassis, forming an air wall while simultaneously pushing some industrial waste towards the bottom of the sweeper truck 1, effectively intercepting and pushing it to the nearest garbage belt, enhancing the cleanliness of the sweeper truck 1. The support rod 66 is installed at the center of the diagonal bar 65, providing additional support and stability, reducing vibration and swaying during the cleaning process, and extending the service life of the brush disc 6 and the drive motor 67. The acute angle design and the installation method of the support rod 66 help the brush disc 6 to be better suspended under the vehicle, maintaining uniform cleaning pressure on uneven road surfaces and improving the cleaning effect.

[0042] like Figure 4 As shown, the cross-sectional shape of the fixing frame 63 is convex, the lower end of the convex fixing frame 63 is a hollow structure, and the groove opened at the upper end is perpendicular to the position of the hollow structure.

[0043] The convex design of the fixed frame 63 provides higher structural strength and increases overall stability, which is crucial for the brush disc 6 to withstand various forces and vibrations during cleaning. The hollow structure effectively reduces the weight of the entire fixed frame 63, making the brush disc 6 lighter and improving the maneuverability and flexibility of the cleaning vehicle. Simultaneously, the hollow structure provides more space for water and waste drainage, preventing water and waste from accumulating inside the frame, thus reducing the time required for cleaning. The convex cross-sectional shape and hollow structure design make the fixed frame 63 easier to clean and maintain. A groove at the top allows cleaning vehicle operators to easily adjust the position of the nozzle 653 for more stable cleaning of the brush disc 6 area. The cross-sectional shape of the convex fixed frame 63 and the groove's placement may help guide debris towards the center of the cleaning vehicle, resulting in a more concentrated and comprehensive cleaning effect. The groove at the top is perpendicular to the hollow structure, which helps prevent collisions and mutual interference between the connecting rod and the motor, ensuring proper operation of the components.

[0044] like Figure 2 and 3 As shown, an arc plate 651 is installed at the lower end of the inclined rod 65, and the angle between the inclined rod 65 and the arc plate 651 is a right angle. The cross-sectional shape of the arc plate 651 is a curved bow shape, and the inner arc side of the arc plate 651 is close to the brush plate 6.

[0045] The right-angled brace 65 and the curved plate 651 together provide a superior cleaning angle, allowing the brush disc 6 to better conform to the ground, thus significantly improving the cleaning effect, especially on uneven surfaces. The right-angled brace 65 and the curved plate 651 help stabilize the brush disc 6 during cleaning, reducing vibration and swaying, and improving cleaning precision, which is crucial in situations requiring precise cleaning. The design of the curved plate 651, to some extent, prevents water and dirt from splashing into the surrounding area, ensuring a cleaner cleaning process while reducing the possibility of operators coming into contact with water and dirt. The curved plate 651 helps to accurately position the angle of the brush 68, forming a tighter surrounding arc surface, making the outer shape of the brush disc 6 fit as closely as possible, avoiding interference between airflows from adjacent nozzles 653, which could cause airflow turbulence around the brush disc 6 and affect its normal cleaning operation. The inner arc side of the curved plate 651, close to the brush disc 6, helps to effectively guide debris and dirt generated during cleaning to the brush disc 6 area for concentrated cleaning. The right-angle connection improves the structural strength of the diagonal bar 65 and the arc plate 651, which helps to improve the stability and durability of the brush plate 6.

[0046] like Figure 2 As shown, a water pipe 652 is installed above the arc plate 651, and a nozzle 653 is installed at the lower end of the water pipe 652. The nozzles 653 are arranged alternately on the arc plate 651, and two adjacent nozzles 653 are not on the same circumferential plane.

[0047] The nozzles 653 are cleverly staggered on the arc plate 651, ensuring that adjacent nozzles 653 are not on the same circumferential plane, thus avoiding the problem of gas cancellation and interference between multiple nozzles 653. This design allows the air sprayed by multiple nozzles 653 to overlap, forming a more tightly enveloping arc surface. The staggered arrangement of the nozzles 653 ensures that the water flow evenly covers the entire cleaning area, improving the uniformity of cleaning and effectively avoiding missed areas and inadequate cleaning. The nozzles 653 arranged on different circumferential planes allow the water flow to spray in multiple directions, achieving a comprehensive cleaning effect and increasing the adaptability of the cleaning vehicle to different road conditions and sites. The staggered arrangement of the nozzles 653 not only reduces the impact of adjacent water flows and reduces the impact force of the water flow on the cleaning vehicle and cleaning area, but also helps to improve the stability and durability of the equipment. In addition, the staggered arrangement design reduces the concentration of water flow, reducing the possibility of water splashing into the surrounding area and maintaining the cleanliness of the cleaning process. By precisely controlling the water flow, not only can the cleaning effect be ensured, but water resources can also be saved more effectively, which is in line with the principles of energy conservation and environmental protection.

[0048] like Figure 5As shown, the nozzle 653 can be divided into a contraction section 654 and an expansion section 655. That is, the internal shape of each nozzle 653 is a contraction-expansion shape. Specifically, the front part contracts from large to small towards the middle to a narrow throat, and then expands outward from small to large to the nozzle 653 opening. The diameter values ​​of the inlet and outlet sections of the nozzle 653 are the same, and the length values ​​of the contraction section 654 and the expansion section 655 are equal.

[0049] The constriction section 654 in the design enables the water flow to quickly form a high-speed flow at the narrow throat, increasing the water velocity and thus improving the impact and effectiveness of cleaning, especially when intensive cleaning of road surfaces is required. Correspondingly, the expansion section 655 expands the water flow from the narrow throat to a larger cross-section, achieving uniform spraying at the nozzle 653 orifice. This helps maintain the uniformity of the water flow, avoids localized water concentration, and increases the cleaning coverage area. The nozzle 653 orifice has the same diameter, and the lengths of the constriction section 654 and the expansion section 655 are approximately equal, which helps reduce the resistance as the water flows through the nozzle 653. This design improves the stability of the water flow, reduces fluctuations, and helps maintain cleaning consistency. Furthermore, the design of the constriction section 654 and the expansion section 655 may reduce the risk of nozzle 653 clogging, as clogging is less likely to occur in a changing structure, thus improving the reliability and stability of the equipment. After the narrow throat, the water flow gradually increases and expands outwards to the nozzle 653 orifice. The gas inside nozzle 653 flows into the front half of nozzle 653 under high pressure, and escapes from the rear half after passing through a narrow throat. Under the same pressure, the gas is compressed through the narrow throat, creating an acceleration effect, and the flow rate can reach 2-3 times that of before. This not only increases the flow rate ejected from nozzle 653 without increasing the additional power of the suction fan, but also enhances the ability to intercept industrial waste and reduces the kinetic energy of the ejected sand and gravel. This helps to avoid the reaction of dust flying during cleaning and reduces the risk of injury from flying sand and gravel.

[0050] like Figure 6As shown, the front end of the support rod 66 has a rectangular groove 661, and the side of the support rod 66 has an elliptical groove 662. The introduction of the rectangular groove 661 and the elliptical groove 662 effectively increases the cross-sectional area of ​​the support rod 66, significantly improving its structural strength. This is crucial for supporting components such as the brush disc 6, making the cleaning vehicle more stable and durable during use. Although the structural strength is enhanced, the grooves, with proper design, help reduce the overall weight of the support rod 66, thereby improving the mobility and ease of operation of the cleaning vehicle. The rectangular groove 661 effectively stabilizes the movement of the inclined rod 65 and provides stability when liquid flows in the water pipe 652, preventing water flow from damaging the nozzle. In addition, the grooves provide a reliable buffering effect, preventing vibration from causing instability in the air wall and ensuring stable cleaning and interception of garbage and dust. To a certain extent, the grooves increase the surface area of ​​the support rod 66, helping to improve its resistance to lateral and longitudinal vibrations, thereby enhancing the stability of the cleaning vehicle during operation.

[0051] like Figure 5 As shown, each air pipe near the nozzle 653 is provided with a rectifier 656. The rectifier 656 has a rectifier 657 on the parallel bisector of its inner axis, and the cross-sectional shape of the rectifier 657 is teardrop-shaped. The rectifier 656 has two air inlets on the opposite side that cooperate with the upper and lower surfaces of the rectifier 657.

[0052] The teardrop-shaped rectifier 657 within the rectifier 656 successfully slows down the airflow, making it more stable. This effectively prevents drastic airflow fluctuations and improves the consistency of cleaning effects near the nozzle 653. By slowing down the airflow, the rectifier 656 reduces the airflow resistance to the nozzle 653, improving the nozzle's efficiency, reducing energy consumption, and making the cleaning vehicle more energy-efficient. The teardrop-shaped rectifier 657 within the rectifier 656 optimizes the airflow direction, making the airflow more evenly distributed to the nozzle 653. This helps avoid localized airflow concentration and improves cleaning uniformity. Two air inlets on the counter-winding side of the rectifier 656, which mate with the upper and lower surfaces of the rectifier 657, cause the gas to impact the pipe wall during flow, creating turbulence, reducing the flow velocity, and decreasing the interception force of the gas when it is ejected from the nozzle 653. After being processed by the rectifier 657, the gas essentially becomes a completely laminar flow, improving the interception force of a single nozzle 653 on industrial waste, as well as the interception force of the air wall formed by multiple nozzles 653. The air inlet on the opposite side allows airflow to pass more effectively through the rectifier 656, reducing the interference of wind direction on the rectification effect and helping to maintain cleaning stability under different wind conditions. By optimizing the airflow rectification effect, the overall cleaning effect of the cleaning vehicle is improved. The stable airflow at the nozzle 653 helps to ensure uniform water spraying, improving the cleaning coverage and comprehensiveness.

[0053] During operation, this invention addresses the issue of industrial waste, such as crushed sand and gravel, often left behind on roads frequently used for transporting building materials and chemical raw materials. When cleaning the road, the driver of the sweeper truck 1 uses the central control system 2 to control the cylinder brush disc 6 module, pushing the brush disc 6 approximately 10 centimeters away from the sweeper truck 1 to expand the cleaning range. Each brush disc 6 rotates towards the center of the sweeper truck; that is, in the direction of travel, the left brush disc 6 rotates clockwise, and the right brush disc 6 rotates counterclockwise. The brush discs 6 tilt forward during cleaning, sweeping the waste to the center of the sweeper truck, forming waste strips on both sides. Simultaneously, the suction fan inside the sweeper truck 1 starts, absorbing the waste from the waste strips on both sides through two suction cups 5 at the rear of the chassis, and then expelling it into the waste bin 4. At the same time, the drive motor 67 in the fixed frame 63 drives the brush 68 to rotate, and water from the water tank 3 flows through the water pipe 652 to the nozzles 653 on the arc plate 651.

[0054] During this process, some air enters the duct connected to the exhaust port. A filter screen (0.250mm, 60-mesh standard) is installed near the exhaust port to intercept most industrial waste. A slanted baffle plate can be installed at the exhaust port duct to block industrial waste, allowing the gas to bypass the baffle before entering the duct. The support pipe, through rectangular grooves 661 and elliptical grooves 662, ensures more stable gas flow into the duct. At the end of the duct, the gas enters four branch pipes, and then, through contraction sections 654 and expansion sections 655, the gas velocity is reduced before being discharged from four nozzles 653.

[0055] Throughout the process, the collision of gas with the inner wall of the duct creates turbulent airflow, leading to a decrease in flow velocity. Therefore, a rectifier 656 is introduced, drawing gas in through its upper and lower inlets. The turbulence is reduced by the rectifier gap between the inlets and the duct wall. After passing through the rectifier 656, the gas essentially transforms into a completely laminar flow, increasing the flow velocity without increasing pressure. At nozzles 653, each nozzle has the same inlet and outlet diameter. The ambient pressure outside the outlet section is set to Pa, and the gas pressure at the nozzle 653 outlet section is set to Pe. In this case, Pe > Pa, resulting in a state of under-expansion. The gas ejected from nozzle 653 can continue to expand outside the nozzle until the pressure equals Pa. A series of expansion waves are formed at the nozzle 653 outlet, further expanding the range of gas ejected from nozzle 653 and increasing the area from which gas is ejected.

[0056] The spray range of a single nozzle 653 is approximately 23 cm, and the air wall formed by four nozzles 653 has a range of approximately 80 cm. To reduce the gaps between adjacent nozzles 653, the four nozzles 653 are staggered, causing their spray ranges to overlap and forming a brush plate-like interception effect. This can intercept 90%-95% of smaller flying gravel, and the remaining 5%-10% will have about 90% of their kinetic energy reduced when passing through the air wall, thus preventing injury to pedestrians on the roadside and improving cleanliness and safety.

[0057] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A road cleaning vehicle, comprising a sweeper (1), a central control system (2), a water tank (3), a garbage bin (4), a suction cup (5), and a brush plate (6), characterized in that, The sweeper (1) is equipped with a central control system (2) at the front end, a water tank (3) at the rear end of the central control system (2), a garbage bin (4) at the rear end of the water tank (3), a suction cup (5) at the lower end of the garbage bin (4), and a brush plate (6) at the lower end of the water tank (3). The brush plate (6) drives the nozzle (653) to tilt towards the center through the horizontal movement of the support rod (66). The tilted nozzle (653) drives the external garbage to move towards the center by the rotation of the brush (68).

2. The road cleaning vehicle according to claim 1, characterized in that: The brush plate (6) includes a fixed rod (61), a fixed plate (62), a fixed frame (63), a horizontal bar (64), a diagonal bar (65), a support rod (66), a drive motor (67), and a brush (68). Fixed rods (61) are installed on both sides of the lower end of the water tank (3). A fixed plate (62) is installed on the other end of the fixed rod (61). A fixed frame (63) is installed on the other side of the fixed plate (62). A horizontal bar (64) is installed on the upper end of the fixed frame (63). A diagonal bar (65) is installed on the other end of the horizontal bar (64), and the angle between the horizontal bar (64) and the diagonal bar (65) is an acute angle. A support rod (66) is installed at the center of the diagonal bar (65). The other end of the support rod (66) is installed on the fixed frame (63). A drive motor (67) is installed inside the fixed frame (63). A brush (68) is installed below the drive mechanism.

3. A road cleaning vehicle according to claim 2, characterized in that: The cross-sectional shape of the fixed frame (63) is convex. The lower end of the convex fixed frame (63) is a hollow structure, and the slot opened at the upper end is perpendicular to the position of the hollow structure.

4. A road cleaning vehicle according to claim 2, characterized in that: An arc plate (651) is installed at the lower end of the inclined rod (65), and the angle between the inclined rod (65) and the arc plate (651) is a right angle. The cross-sectional shape of the arc plate (651) is a bow shape, and the inner arc side of the arc plate (651) is close to the brush (68).

5. A road cleaning vehicle according to claim 2, characterized in that: A water pipe (652) is installed above the arc plate (651), and a nozzle (653) is installed at the lower end of the water pipe (652). The nozzles (653) are arranged alternately on the arc plate (651), and two adjacent nozzles (653) are not on the same circumferential plane.

6. A road cleaning vehicle according to claim 5, characterized in that: Each nozzle (653) can be divided into a contraction section (654) and an expansion section (655). That is, the internal shape of each nozzle (653) is a contraction followed by an expansion. The front part is a narrow throat that narrows towards the middle, and then expands outward from the throat to the nozzle (653) opening. The diameter values ​​of the inlet and outlet sections of the nozzle (653) are the same, and the length values ​​of the contraction section (654) and the expansion section (655) are equal.

7. A road cleaning vehicle according to claim 2, characterized in that: The front end of the support rod (66) is provided with a rectangular groove (661), and the side of the support rod (66) is provided with an elliptical groove (662).

8. A road cleaning vehicle according to claim 6, characterized in that: Each air pipe is equipped with a rectifier (656) near the nozzle (653). The rectifier (656) has a rectifier (657) on a bisector parallel to the inner axis. The cross-sectional shape of the rectifier (657) is teardrop-shaped. The rectifier (656) has two air inlets on the windward side that cooperate with the upper and lower surfaces of the rectifier (657).

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