An air circulation cleaning system of a road sweeper using a regenerative air flow technique

Abstract

The utility model provides a kind of air circulation cleaning system of road sweeper applying regenerative airflow technology belongs to road sweeper field, it includes blow-suction integrated suction nozzle, dustbin, gas-solid separation unit and centrifugal fan;Blow-suction integrated suction nozzle includes cleaning shell, and cleaning shell is divided into gas outlet chamber and air inlet chamber, and gas outlet chamber lower end is open and can be tightly ground, and gas outlet chamber upper end is communicated gas outlet one;The lower end of air inlet chamber is provided with air knife nozzle, and air knife nozzle is communicated gas outlet chamber;The upper end of air inlet chamber is communicated with air inlet one;Dustbin is connected with the gas outlet one of blow-suction integrated suction nozzle, and gas-solid separation unit of different levels is distributed in the inside and rear part of dustbin, and the gas-solid separation unit in rear part is connected with the air inlet end of centrifugal fan;The air outlet end of centrifugal fan is communicated with the air inlet one of blow-suction integrated suction nozzle.The utility model has the beneficial effect that the power of cleaning system is reduced, higher energy efficiency ratio is realized, and a large amount of water resources is saved.

Description

Technical Field

[0001] This utility model belongs to the field of road sweepers, specifically relating to an air circulation sweeping system for a road sweeper that utilizes regenerated airflow technology. Background Technology

[0002] In urban sanitation work, road sweepers are specialized vehicles used to clean up dust, sand, leaves, garbage, and other debris from roads. During operation, they work by utilizing the negative pressure generated by a centrifugal fan to suck the dust, sand, leaves, and garbage from the road into a garbage bin through a suction nozzle, thus achieving the cleaning purpose.

[0003] Currently, most road sweepers on the market use open pneumatic conveying systems. In this system, the sweeping discs first collect garbage to the suction nozzle, then a centrifugal fan generates negative pressure to transport the garbage into the garbage bin, where a spray-like settling effect traps the garbage. Simultaneously, air enters the garbage bin through the suction nozzle and is then exhausted to the outside atmosphere by the centrifugal fan. Therefore, throughout the entire road sweeping operation, the centrifugal fan provides the negative pressure for the movement of air and garbage, and a significant amount of dynamic pressure is discharged with the airflow, resulting in substantial power loss.

[0004] Meanwhile, when using this type of cleaning system for road cleaning, the negative pressure generated below the suction nozzle alone cannot effectively absorb the dust from the road crevices. To ensure that the road surface is thoroughly clean, high-pressure water is usually used behind the suction nozzle, which results in a waste of water resources during the entire road cleaning process. Utility Model Content

[0005] The purpose of this invention is to address the problems of severe power loss, poor cleaning effect, and serious resource waste in existing road sweepers during operation. It proposes and designs an air circulation sweeping system for road sweepers that utilizes regenerated airflow technology, enabling it to overcome these problems while meeting road sweeping requirements, reducing the power consumption of the sweeping system, achieving a higher energy efficiency ratio, and saving a significant amount of water resources.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: an air circulation cleaning system for a road sweeper using regenerated airflow technology, comprising an integrated blow-suction nozzle, a garbage bin, a gas-solid separation unit, and a centrifugal fan; the integrated blow-suction nozzle includes a cleaning housing, the interior of which is provided with a middle partition, which divides the inner cavity of the cleaning housing into an air outlet chamber and an air inlet chamber. The air outlet chamber is located in the lower part of the inner cavity of the cleaning housing, with its lower end open and able to be close to the ground, and its upper end connected to... There is one air outlet; the air inlet chamber is located in the upper part of the inner cavity of the cleaning housing, and the lower end of the air inlet chamber is equipped with an air knife nozzle. The air knife nozzle is located in the rear part of the inner cavity of the cleaning housing and is connected to the air outlet chamber; the upper end of the air inlet chamber is connected to one air inlet; the upstream of the input end of the garbage bin is connected to the air outlet of the integrated blow-suction nozzle through the garbage input pipe. The inside and rear of the garbage bin are gas-solid separation units. The gas output end of the gas-solid separation unit is connected to the air inlet end of the centrifugal fan. The air outlet end of the centrifugal fan is connected to the air inlet of the integrated blow-suction nozzle through the air output pipe. Based on this, when using this invention for road sweeping operations, the regenerated airflow blown by the centrifugal fan can first be guided to the integrated blow-suction nozzle below. Air knife technology is then applied within the integrated blow-suction nozzle to blow out gravel, dust, and other debris from the road surface and even crevices. Subsequently, the blown-out debris follows the airflow through the air outlet and debris input pipe of the integrated blow-suction nozzle, ultimately entering the debris bin. The airflow and debris entering the debris bin are separated by the gas-solid separation unit and then re-enter the centrifugal fan for acceleration. After acceleration, the airflow returns to the integrated blow-suction nozzle below for another cleaning operation. The gas-solid separation unit includes a natural settling mechanism for debris entering the debris bin, a coarse filtration device, and a dust separation device. In this way, this invention can clean the road surface using recirculated clean air without using high-pressure water, fully utilizing the power lost by existing road sweepers during the sweeping process, thereby reducing the power consumption of the road sweeper system and achieving a higher energy efficiency ratio. It also saves a significant amount of water resources.

[0007] Furthermore, the cleaning housing includes an upper cover plate, with a left side plate installed on the left side and a right side plate installed on the right side, connected by a middle partition plate. A front outer rubber sheet and a front inner rubber sheet are sequentially installed on the front side of the upper cover plate from the outside in. A rear baffle plate is bent downwards on the rear side of the upper cover plate, with a rear sealing strip and a flow guiding strip sequentially installed on the lower end of the rear baffle plate from back to front, the lower end of the flow guiding strip tilting forward. Moreover, the lower end of the rear sealing strip needs to be close to the ground during operation to improve the sealing effect of the cleaning housing cavity at the rear end.

[0008] Furthermore, the outer and inner front rubber sheets are hinged to the front end of the upper cover plate via a front rubber sheet bracket. A forward-tilting actuator is installed between the front rubber sheet bracket and the upper cover plate, which controls the front rubber sheet bracket to flip, i.e., controls the outer and inner front rubber sheets to flip outward. In normal operating conditions, when cleaning up common sand, dust, and household waste on the road surface, the outer and inner front rubber sheets can be kept in a vertical position. In this state, they form a relatively enclosed space with other components on the sweeper housing and the ground, and the airflow containing sand, dust, and other materials is sucked into the garbage bin during the sweeper's movement. During the leaf-fall season, when the road surface contains lightweight materials such as leaves and branches, the forward-tilting actuator drives the outer and inner front rubber sheets to flip forward, ensuring that a large amount of fallen leaves enter below the integrated suction nozzle during vehicle movement and, under the action of the bottom airflow, enter the garbage inlet pipe and then the garbage bin. Moreover, as a preferred embodiment, the forward tilting actuator can adopt a telescopic structure such as an electric push rod or a cylinder, and the two ends of the forward tilting actuator are respectively hinged to the front rubber bracket and the upper cover plate, so as to adjust the forward tilting height of the front outer rubber and the front inner rubber by the extension and retraction of the forward tilting actuator; and in actual operation, the forward tilting height of the front outer rubber and the front inner rubber can be flexibly adjusted according to the amount of fallen leaves on the road.

[0009] Furthermore, the gas-solid separation unit includes an airflow baffle, a filter screen, and a dust separation device. The upper end of the airflow baffle is connected to the inner top wall of the garbage bin, the front end of the airflow baffle is connected to the front side wall of the garbage bin, and the rear end of the airflow baffle is connected to the rear side wall of the garbage bin. The filter screen includes a vertical filter screen installed on the opposite side of the airflow baffle and a horizontal filter screen installed between the lower ends of the airflow baffle and the vertical filter screen on the opposite side. The garbage bin has an airflow outlet located above the horizontal filter screen. The airflow outlet is located in the upper middle part of the front side wall of the garbage bin. A dust separation device is installed on the outside of the airflow outlet. The gas output end of the dust separation device is connected to the air inlet end of the centrifugal fan. The gas-solid separation unit also includes an inlet guide plate located above the garbage input pipe inside the garbage bin.

[0010] At this point, the airflow carrying the garbage discharged from the outlet of the integrated blow-suction nozzle first enters the garbage bin through the garbage inlet. Due to the large space inside the garbage bin, the airflow velocity decreases, and denser materials such as sand, gravel, and large branches and bark will naturally settle. Moreover, because this invention is equipped with an airflow baffle, it ensures that materials such as sand and leaves follow the airflow without directly passing through the filter screen, and when their velocity is lower than the suspension velocity, they can be retained inside the garbage bin. Subsequently, based on the suction effect of the centrifugal fan at the rear, smaller leaves, dust, and other less dense materials will continue to move with the airflow and undergo coarse filtration as the airflow passes through the filter screen. At this point, only fine particles can continue to move with the airflow to the subsequent dust separation device, where further gas-solid separation takes place. Finally, the clean air, after secondary filtration by the filter screen and dust separation device, is output to the centrifugal fan and used for subsequent cleaning operations.

[0011] Furthermore, the dust separation device includes a separation shell installed on the outside of the garbage bin. An air inlet 2 is located at the top of the separation shell, connected to an airflow outlet. An air outlet 2 is located in the middle of one side wall of the separation shell, connected to an air inlet 3 of the centrifugal fan. A dust collection chamber is located at the bottom of one side wall of the separation shell. An accelerated centrifugal channel is located inside the separation shell, connecting both the air inlet 2, the air outlet 2, and the dust collection chamber. The airflow filtered by the filter first enters the separation shell through the airflow outlet and the air inlet 2. Then, guided by the accelerated centrifugal channel, the downward velocity of the air and dust within the airflow is converted into rotational velocity. The air and dust, with a certain initial rotational velocity, are separated under centrifugal force through the guided flow of the accelerated centrifugal channel. The air flows through the air outlet 2 to the centrifugal fan, while the dust falls directly into the dust collection chamber. This solves the problem of dust adhering to the centrifugal fan blades and affecting the fan's performance. Simultaneously, it does not require additional energy consumption, thus significantly reducing costs.

[0012] Furthermore, the separation shell includes a left plate and a right plate arranged opposite to each other. A rear mounting plate is connected between the rear sides of the left plate and the rear sides of the right plate, and the rear mounting plate is installed on the outer side of the front wall of the garbage bin. An arc-shaped shell is connected between the front sides of the left plate and the front sides of the right plate. The upper part of the arc-shaped shell protrudes outward, and an inclined bottom plate is connected to the lowest end of the arc-shaped shell. An air outlet two is located in the middle of the left plate and is equipped with an outlet pipe. An inlet arc plate is provided in the upper part of the separation shell. The inlet arc plate is located above the air outlet two. The inlet arc plate, the arc-shaped shell, the left plate, and the right plate together constitute the air inlet two. An arc-shaped guide plate is provided below the inlet arc plate. The arc-shaped guide plate, the arc-shaped shell, the left plate, and the right plate together constitute an accelerating centrifugal channel. A dust guide plate is provided below the arc-shaped shell. The gap between the dust guide plate and the lower part of the arc-shaped guide plate, together with the left plate and the right plate, constitutes a dust separation channel. A dust collection chamber is provided in the bottom area of ​​the separation shell.

[0013] Furthermore, an intermediate baffle is installed on the inner middle of the separation shell near the garbage bin. The intermediate baffle is located between the inlet arc plate and the arc-shaped guide plate to block the moving dust and make it stop as soon as possible at the bottom of the dust collection chamber.

[0014] Furthermore, a rear mounting plate is installed on the front outer wall of the garbage bin. A drain outlet is located on the front outer wall of the garbage bin, corresponding to the lower part of the dust collection chamber. A latch plate is hinged to the upper end of the drain outlet, and a drain door is provided on the rear wall of the garbage bin. When the sweeper is in normal operation, since both the separation shell and the garbage bin are vertically positioned, the latch plate is also vertical under gravity. The vertically positioned latch plate can close the drain outlet, preventing the collected dust from being discharged from the drain outlet. When the garbage bin of the sweeper is tilted, the separation shell tilts with the garbage bin, and the latch plate remains vertical under gravity. A certain angle is formed between the drain outlet or the front wall of the garbage bin and the vertical latch plate. The dust in the dust collection chamber can be discharged into the garbage bin through this angle, so that it is discharged with the garbage in the garbage bin.

[0015] Furthermore, the centrifugal fan is equipped with an air outlet at its outlet end, and a pressure relief device is provided on the side wall of the air outlet. The air volume entering the integrated blow-suction nozzle is controlled by the pressure relief device to prevent light materials such as leaves in front of the integrated blow-suction nozzle from being blown out by the high-speed airflow behind.

[0016] Furthermore, the pressure relief device includes a pressure relief window on the side wall of the air outlet, and a pressure relief mechanism is hinged to the lower end of the pressure relief window. The pressure relief mechanism is driven by a pressure relief drive mechanism. The pressure relief drive mechanism can control the pressure relief mechanism to be parallel to and fit against the side wall of the air outlet where the pressure relief window is located. The pressure relief drive mechanism can also control the included angle between the pressure relief mechanism and the side wall of the air outlet where the pressure relief window is located to be less than 90 degrees or 0 degrees, so as to control the opening and closing of the pressure relief window.

[0017] As can be seen from the above technical solutions, this utility model has the following advantages: When using this utility model for road cleaning operations, this utility model can achieve road cleaning by using recirculated clean air without using high-pressure water to clean the road surface, and make full use of the power lost by the existing road sweeper during the cleaning process, thereby reducing the power of the road sweeper's cleaning system and achieving a higher energy efficiency ratio. At the same time, it can also save a lot of water resources. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 This is a schematic diagram of the integrated blow-suction nozzle of this utility model; Figure 3 This is a cross-sectional view of the integrated blow-suction nozzle of this utility model at the air inlet. Figure 4 This is a cross-sectional view of the integrated blow-suction nozzle of this utility model at the air outlet. Figure 5 This is a schematic diagram of the internal structure of the trash can in this utility model; Figure 6 This is a schematic diagram showing the cooperation between the garbage bin and the dust separation device in this utility model; Figure 7 This is a schematic diagram of the dust separation device in this utility model; Figure 8 This is a cross-sectional view of the dust separation device in this utility model. Figure 9 This is a schematic diagram of the centrifugal fan in this utility model. Figure 1 ; Figure 10 This is a schematic diagram of the centrifugal fan in this utility model. Figure 2 .

[0020] In the diagram: 1. Integrated blow-suction nozzle; 1.1. Top cover; 1.2. Right side panel; 1.3. Front outer rubber; 1.4. Left side panel; 1.5. Air inlet pipe; 1.6. Air outlet pipe; 1.7. Front inner rubber; 1.8. Guide strip; 1.9. Rear rubber strip bracket; 1.10. Rear sealing strip; 1.11. Front rubber bracket; 1.12. Horizontal baffle plate; 1.13. Forward tilting actuator; 1.14. Middle partition plate; 1.141. Vertical 1.142. Inclined section; 1.15. Left side roller assembly; 1.16. Spray connector; 1.17. Vertical inclined guide plate; 1.18. Rear baffle; 1.19. Air knife guide plate; 1.20. Connecting port; 1.21. Arc-shaped guide plate; 1.22. Sealing plate; 1.23. Air knife nozzle; 1.24. Inlet chamber; 1.25. Outlet chamber; 2. Air output pipe; 3. Centrifugal fan; 3.1. Drive motor; 3.2. 3.3 Air Inlet Three; 3.3 Pressure Relief Device; 3.31 Pressure Relief Window; 3.32 Pressure Relief Mechanism; 3.33 Pressure Relief Drive Mechanism; 3.4 Air Outlet; 4. Gas-Solid Separation Unit; 4.1 Airflow Baffle; 4.2 Inlet Guide Plate; 4.3 Filter Screen; 4.4 Door Latch; 4.5 Airflow Outlet; 4.6 Drain Door; 4.7 Dust Separation Device; 4.71 Separation Housing; 4.72 Air Inlet Two; 4.73 Left Plate 4.74. Second air outlet; 4.75. Rear mounting plate; 4.76. Right plate; 4.77. Outlet pipe; 4.78. Accelerating centrifugal channel; 4.79. Arc-shaped shell; 4.710. Inclined bottom plate; 4.711. Dust guide plate; 4.712. Arc-shaped guide plate; 4.713. Intermediate baffle; 4.714. Dust separation channel; 4.715. Inlet arc plate; 4.716. Dust collection chamber; 5. Waste bin; 6. Waste input pipe. Detailed Implementation

[0021] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0022] like Figure 1 As shown, this utility model provides an air circulation cleaning system for a road sweeper that uses regenerated airflow technology, which includes components such as an integrated blow-suction nozzle 1, a garbage bin 5, a gas-solid separation unit 4, and a centrifugal fan 3.

[0023] The integrated blow-suction nozzle 1 is a crucial component of the entire system, playing a role in collecting garbage and cleaning the road surface. For example... Figure 2 , Figure 3 , Figure 4 As shown, the integrated blow-suction nozzle 1 adopts the following structure: The integrated blow-suction nozzle 1 includes a cleaning housing, which is welded together from components such as an upper cover plate 1.1, a left side plate 1.4, and a right side plate 1.2. The left side plate 1.4 is welded to the left end of the upper cover plate 1.1, and a left roller assembly 1.15 is installed on the outer side of the left side plate 1.4. The right side plate 1.2 is welded to the right end of the upper cover plate 1.1, and a right roller assembly is installed on the outer side of the right side plate 1.2. The left roller assembly 1.15 and the right roller assembly are used to reduce the wear of the integrated blow-suction nozzle 1 on the road surface, and they preferably adopt a long slot structure as the mounting structure to ensure that the height can be adjusted vertically.

[0024] Meanwhile, this utility model also achieves a hinged installation between the front end of the upper cover plate 1.1 and the front rubber bracket 1.11. The front rubber bracket 1.11 is equipped with a front inner rubber 1.7 and a front outer rubber 1.3. The front inner rubber 1.7 is located inside the front outer rubber 1.3. Furthermore, a forward-tilting actuator 1.13 is provided between the front rubber bracket 1.11 and the upper cover plate 1.1, and the front rubber bracket 1.11 can be flipped through the forward-tilting actuator 1.13, that is, the front outer rubber 1.3 and the front inner rubber 1.7 are flipped outward. In this way, under normal operating conditions, that is, when it needs to clean up ordinary sand, dust, leaves and other materials on the road surface, the front outer rubber 1.3 and the front inner rubber 1.7 can be controlled to be in a vertical state. At this time, they can form a relatively closed space with other parts on the sweeper shell and the ground, and suck the airflow containing sand and dust into the garbage bin 5 during the sweeper's movement. During the leaf-fall season, the front outer rubber sheet 1.3 and the front inner rubber sheet 1.7 can be tilted forward by the front tilting actuator 1.13, ensuring that a large amount of fallen leaves enter below the integrated suction nozzle 1 as the vehicle moves forward, and then enter the garbage input pipe 6 under the action of the bottom airflow, thus entering the garbage bin 5. Moreover, preferably, the front tilting actuator 1.13 can adopt a telescopic structure such as an electric push rod or a cylinder, and the two ends of the front tilting actuator 1.13 are respectively hinged to the front rubber sheet bracket 1.11 and the upper cover plate 1.1, so that the tilting height of the front outer rubber sheet 1.3 and the front inner rubber sheet 1.7 can be adjusted by the extension and retraction of the front tilting actuator 1.13; and in actual operation, the tilting height of the front outer rubber sheet 1.3 and the front inner rubber sheet 1.7 can be flexibly adjusted according to the amount of fallen leaves on the road.

[0025] Furthermore, this utility model also includes a rear baffle 1.18 bent downwards on the rear side of the upper cover plate 1.1. At the lower end of the rear baffle 1.18, a rear sealing strip 1.10 and a flow guiding strip 1.8 are installed sequentially from back to front via a rear rubber strip bracket 1.9 and a rubber strip fixing bracket. The lower end of the rear sealing strip 1.10 is close to the ground, and the lower end of the flow guiding strip 1.8 is inclined forward. Preferably, the rear sealing strip 1.10 has two layers, and the angle of the flow guiding strip 1.8 inclined forward is preferably designed to be about 20°, that is, the angle between it and the ground is preferably designed to be about 70°, so that the flow guiding strip 1.8 can play a guiding role and the rear sealing strip 1.10 can play a sealing role.

[0026] An air outlet is provided at the right end of the upper cover plate 1.1, and an air outlet pipe 1.6 is installed at the air outlet. An air inlet is provided at the left end of the upper cover plate 1.1, and an air inlet pipe 1.5 is installed at the air inlet. A middle partition plate 1.14 is provided below the upper cover plate 1.1. The lower end of the middle partition plate 1.14 is welded to the air knife guide plate 1.19 from left to right. The left end of the middle partition plate 1.14 and the air knife guide plate 1.19 is welded to the left side plate 1.4, and the right end of the middle partition plate 1.14 and the air knife guide plate 1.19 is welded to the right side plate 1.2. Moreover, the bottom surface of the air knife guide plate 1.19 is higher than the lower end of the left side plate 1.4 and the right side plate 1.2. At the lower end of .2, the upper end of the intermediate partition 1.14 is welded to the inner wall of the upper cover 1.1, thereby dividing the inner cavity of the cleaning housing into two spaces, namely the air inlet chamber 1.24 and the air outlet chamber 1.25; the rear end of the air knife guide plate 1.19 is opposite to the guide strip 1.8, and the gap between the rear end of the air knife guide plate 1.19 and the guide strip 1.8 gradually increases in width from the blowing side to the suction side in the height section, forming a channel for connecting the two spaces.

[0027] Specifically, in this structure, the intermediate partition 1.14 includes a vertical portion 1.141 and an inclined portion 1.142 at the front. The inclined portion 1.142 gradually slopes upward from back to front, and a connecting port 1.20 is provided at the position opposite to the air outlet 1 on the inclined portion 1.142. At this time, the lower end of the air outlet pipe 1.6 is welded to the outer ring of the connecting port 1.20, and the upper end of the air outlet pipe 1.6 passes through the air outlet 1 and connects to the garbage input pipe 6. Moreover, the air outlet pipe 1.6 is preferably welded in an inclined posture, for example, it is designed to form an angle of about 70° with the ground to conform to the angle between the garbage input pipe 6 and the cargo box.

[0028] The inclined portion 1.142 has a vertical portion 1.141 that bends upward at its front end. The upper end of the vertical portion 1.141 is welded to the inner wall of the upper cover plate 1.1. The left and right ends of the vertical portion 1.141 are welded to the left side plate 1.4 and the right side plate 1.2, respectively. Furthermore, at the midpoint between the air inlet and the air outlet, a vertically inclined guide plate 1.17 is welded between the inclined portion 1.142 and the upper cover plate 1.1. The vertically inclined guide plate 1.17 gradually tilts forward towards the air inlet, i.e., it gradually tilts forward from right to left. The vertically inclined guide plate 1.17 is located between the air inlet and the air outlet, and its front end is welded to the vertical portion 1.141. At the rear side of the first air outlet, the rear end of the vertically inclined guide plate 1.17 is laterally bent to form a horizontal baffle plate 1.12; the upper part of the vertically inclined guide plate 1.17 and the horizontal baffle plate 1.12 are installed with the upper cover plate 1.1 by welding, and the lower end is installed with the inclined part 1.142 by welding. The right end of the horizontal baffle plate 1.12 is installed with the right side plate 1.2 by welding.

[0029] Meanwhile, the lower end of the inclined portion 1.142 of the intermediate partition 1.14 is welded to the bent air knife guide plate 1.19. The air knife guide plate 1.19 is arranged opposite to the guide strip 1.8, thereby forming an air jet channel whose width gradually increases from left to right in the height section. The length of the air jet channel is equal to the length of the inner cavity of the sweeping housing, and it is used as the air knife nozzle 1.23 of the entire road sweeper using regenerated air technology.

[0030] At this point, the space enclosed by the upper cover plate 1.1, the rear part of the right side plate 1.2, the rear baffle 1.18, the upper part of the left side plate 1.4, the middle partition 1.14, the vertical inclined guide plate 1.17, and the transverse baffle 1.12 can form an air intake chamber 1.24, which is connected to the air inlet. The space enclosed by the lower part of the right side plate 1.2, the middle partition 1.14, the lower part of the left side plate 1.4, the front inner rubber 1.7, and the road surface can form an air outlet chamber 1.25, which is connected to the air outlet through the connecting port 1.20 and the air outlet pipe 1.6. At the same time, the air outlet chamber 1.25 can also be connected to the air intake chamber 1.24 through the aforementioned air knife nozzle 1.23. Meanwhile, this utility model can guide the air flowing in above the intermediate partition 1.14 through the cooperation of the air knife guide plate 1.19 and the guide strip 1.8; in this way, as the air flows through the jet channel, it can increase the airflow speed through the gradually narrowing jet channel cross section, so that the air is blown downward and forward at a high speed and forms an air knife to clean the tiny particles in the road surface gaps; and the air flow velocity at this point can reach about 100m / s according to the experiment.

[0031] To improve the efficiency of the system in absorbing waste, this invention features an arc-shaped guide plate 1.21 installed at the angle between the lower part of the intermediate partition 1.14, the inner side of the right side plate 1.2, and the rear part of the front inner rubber sheet 1.7. This accelerates the collection and transfer of waste inside the suction nozzle. The rear rubber strip bracket 1.9 is mounted on the plane behind the rear baffle 1.18, and the guide strip 1.8 is mounted on the front plate of the rear rubber strip bracket 1.9 with a 20° inclination angle. The lower part of the inclined portion 1.142 of the intermediate partition 1.14, the air knife guide plate 1.19, the guide strip 1.8, and the front panel of the rear rubber strip bracket 1.9 gradually tilt backward from left to right, thereby tilting the air knife nozzle 1.23 so that the accelerated air has a speed tilted towards the air outlet. In this way, the high-speed airflow generated by the air knife nozzle 1.23 accelerates the collection of ground debris and gives it an initial acceleration. Combined with the absorption effect of the negative pressure at the connecting port 1.20, the debris will rotate and rise into the air outlet pipe 1.6. In particular, denser materials such as small stones will accelerate the process from initial acceleration to suspension and then to absorption, thereby improving the cleaning efficiency. At the same time, the thicker arc-shaped guide plate 1.21 can also prevent the front inner rubber sheet 1.7 from being sucked up by the negative pressure of the air outlet pipe 1.6.

[0032] In addition, it should be noted that, apart from the above-mentioned structure, other structures that can divide the internal space of the cleaning housing into an air inlet chamber 1.24 and an air outlet chamber 1.25, and form an air knife nozzle 1.23, are all included within the protection scope of this utility model.

[0033] like Figure 5 , Figure 6As shown, the trash can 5 provides storage space for garbage and impurities such as stones, dust, branches and leaves. Since a centrifugal fan 3 is provided at the rear, a gas-solid separation unit 4 is set inside and outside the trash can 5. The entire gas-solid separation unit 4 includes the natural sedimentation, coarse filtration device and dust separation device 4.7 inside the trash can 5.

[0034] When the garbage passes through the suction nozzle outlet pipe 1.6, a spray will be sprayed out from the spray connector 1.16, increasing the density of solid particles. After being transported upward along the garbage input pipe 6 to the garbage bin 5, the garbage's movement direction is changed by the guiding effect of the inlet guide plate 4.2. After the airflow enters the garbage bin, the space will increase and the airflow speed will decrease. The garbage carried by the airflow will naturally settle to the bottom of the garbage bin after its speed is lower than its suspension speed. Generally, stones, gravel and other materials can remain inside the garbage bin through natural settling. Lighter materials continue to move with the airflow and enter the coarse filtration device, which includes an airflow baffle 4.1 and a filter screen 4.3. The upper end of the airflow baffle 4.1 is connected to the inner top wall of the garbage bin 5, the front end of the airflow baffle 4.1 is connected to the front side wall of the garbage bin 5, and the rear end of the airflow baffle 4.1 is connected to the rear side wall of the garbage bin 5. The filter screen 4.3 includes a vertical filter screen located on the opposite side of the airflow baffle 4.1 and a horizontal filter screen located between the lower ends of the airflow baffle 4.1 and the vertical filter screen. The filter screen 4.3 can generally be a diamond or square mesh, and the recommended mesh size is between 15mm and 30mm. An airflow outlet 4.5 is provided above the filter screen 4.3. The airflow outlet 4.5 is located in the middle section of the front side wall of the garbage bin 5 and is connected to the air inlet of the dust separation device 4.7. Lighter materials undergo coarse filtration as they pass through the filter screen 4.3, limited by the size of the mesh openings. Only micron-sized dust and near-powder-like particles remain in the coarse filtration device, which then enters the dust separation device 4.7 through the airflow outlet 4.5.

[0035] Furthermore, the gas-solid separation unit 4 also includes a garbage inlet located on the upper part of the garbage bin 5. The garbage inlet and the filter screen 4.3 are located on both sides of the airflow baffle 4.1. The garbage inlet serves as the input end of the entire gas-solid separation unit 4 and is connected to the output end of the garbage inlet pipe 6. The garbage inlet pipe 6 is connected to the air outlet of the blow-suction integrated nozzle 1. Moreover, preferably, as Figure 6As shown, this utility model can tilt the garbage input pipe 6 and extend its upper end into the garbage bin 5 through the garbage input port. Simultaneously, this utility model can also install an inlet guide plate 4.2 above the top of the garbage input pipe 6, with the front end of the inlet guide plate 4.2 connected to the upper end of the garbage input pipe 6, and the rear end of the inlet guide plate 4.2 bent backward and horizontally positioned. Thus, when the airflow carrying garbage enters the garbage bin 5 through the garbage input pipe 6, the airflow carrying garbage output from the outlet of the garbage input pipe 6 will be horizontally ejected under the guidance of the inlet guide plate 4.2. Furthermore, during this process, the inlet guide plate 4.2 at the outlet of the garbage input pipe 6 will guide the garbage and airflow, preventing the garbage from directly impacting the top plate of the garbage bin 5 and causing wear.

[0036] like Figure 7 , Figure 8 As shown, the dust separation device 4.7 includes a separation shell 4.71 installed on the outside of the garbage bin 5. The separation shell 4.71 includes a left plate 4.73 and a right plate 4.76 arranged opposite to each other. A rear mounting plate 4.75 is connected between the rear sides of the left plate 4.73 and the rear sides of the right plate 4.76. An arc-shaped shell 4.79 is connected between the upper and front parts of the left plate 4.73 and the right plate 4.76, and an inclined bottom plate 4.710 is connected to the lower part. An outlet pipe 4.77 is connected to the middle of the left plate 4.73 and the right plate 4.76, which is the second air outlet 4.74 for dust separation. The second air outlet 4.74 is connected to the third air inlet 3.2 of the centrifugal fan 3 and outputs the separated clean air to the centrifugal fan 3.

[0037] The rear mounting plate 4.75 is installed on the front side wall of the garbage bin 5 using bolts; as Figure 7 , Figure 8 As shown, the left plate 4.73 and the right plate 4.76 are internally connected by an inlet arc plate 4.715. At this time, the space enclosed by the upper part of the arc-shaped shell 4.79, the inlet arc plate 4.715, the left plate 4.73, and the right plate 4.76 together forms an air inlet 4.72, which connects the air inlet 4.72 with the air outlet 4.5. The height of the inlet arc plate 4.715 is lower than the lower opening on the front side wall of the garbage bin 5. Moreover, as a preferred embodiment, this utility model can use a thick rubber overlap gasket to achieve an airtight connection between the rear mounting plate 4.75 and the front side wall of the garbage bin 5 to ensure isolation from the outside air.

[0038] like Figure 7 , Figure 8As shown, an arc-shaped guide plate 4.712 is connected inside the left plate 4.73 and the right plate 4.76, and is welded below the inlet arc plate 4.715. At this time, the middle part of the arc-shaped shell 4.79 and the arc-shaped guide plate 4.712 together form the acceleration centrifugal channel 4.78. The high-speed airflow carrying dust flows through the air inlet 4.72 and then rotates and accelerates in the acceleration centrifugal channel 4.78. The dust is thrown out under the action of centrifugal force and comes out along the lower part of the arc-shaped shell 4.79, i.e., the dust guide plate 4.711. The dust that comes out passes through the dust separation channel 4.714 and will rush towards the middle baffle 4.713 due to inertia. The middle baffle 4.713 is welded to the middle part of the left plate 4.73 and the right plate 4.76. Finally, it will enter the dust collection chamber 4.716 at the bottom. Due to the suction effect of the centrifugal fan 3 at the rear, air flows out through the air outlet 4.74.

[0039] This utility model also has a hole on the front side wall of the garbage bin 5 as a sewage outlet. A latch plate 4.4 is installed on the sewage outlet by hinge. Due to gravity, the latch plate 4.4 will be in a vertical closed state. The arc-shaped guide plate 4.712, the middle baffle 4.713, the inclined bottom plate 4.710, the front side wall of the garbage bin 5, the latch plate 4.4, the left plate 4.73, and the right plate 4.76 together constitute the dust collection chamber 4.716. Due to the lack of excessive interference, the internal air velocity is close to 0. When dust falls in, it will accumulate at the bottom as soon as possible and stop moving.

[0040] A drain door 4.6 is provided on the rear side wall of the garbage bin 5. When the sweeper is in normal operation, since both the separation shell 4.71 and the garbage bin 5 are vertically arranged, the vertically arranged latch plate 4.4 can close the drain port or drain window to prevent the collected dust from being discharged from the drain port. When the garbage bin 5 of the sweeper is tilted, since the separation shell 4.71 tilts with the garbage bin 5, the latch plate 4.4 is vertical under the action of gravity. A certain angle will be formed between the separation shell 4.71 and the vertical latch plate 4.4, and the collected dust will be discharged into the garbage bin 5 through this angle, so that it will be discharged together with the garbage in the garbage bin 5.

[0041] like Figure 1 , Figure 9 , Figure 10 As shown, the centrifugal fan 3 is installed on one side of the dust separation device 4.7 and is driven by a motor 3.1 to convert electrical energy into kinetic energy, providing sufficient kinetic energy while overcoming the resistance of the entire system. Furthermore, the air inlet 3.2 of the centrifugal fan 3 and the air outlet 4.74 of the dust separation device 4.7 are preferably sealed using a beveled fit with a rubber gasket. This allows the rubber gasket to be compressed under gravity, ensuring the airtightness of the entire system.

[0042] The centrifugal fan 3 has an air outlet 3.4 at its outlet. The air outlet 3.4 is connected to the air inlet pipe 1.5 of the integrated blow-suction nozzle 1 via an air output pipe 2. A pressure relief device 3.3 is provided on the side wall of the air outlet 3.4. The pressure relief device 3.3 includes a pressure relief window 3.31 on the side wall of the air outlet 3.4. A pressure relief mechanism 3.32 is hinged to the lower end of the pressure relief window 3.31. The pressure relief mechanism 3.32 is driven by a pressure relief drive mechanism 3.33. The pressure relief drive mechanism 3.33 controls the pressure relief mechanism 3.32 to rotate around its lower hinge point, thereby opening and closing the pressure relief window 3.31. Specifically, it controls the angle between the pressure relief mechanism 3.32 and the side wall of the air outlet 3.4 where the pressure relief window 3.31 is located to be 0 degrees or less than 90 degrees. In this way, the present invention can control the airflow entering the integrated blow-suction nozzle 1 through the pressure relief device 3.3, preventing light materials such as leaves in front of the integrated blow-suction nozzle 1 from being blown out by the high-speed airflow behind. Moreover, the pressure relief drive mechanism 3.33 can adopt a telescopic structure such as an electric actuator or an air pump, and the two ends of the telescopic structure are respectively hinged to the outer wall of the centrifugal fan 3 and the outer wall of the pressure relief mechanism 3.32, so that the extension and retraction of the telescopic structure drives the pressure relief mechanism 3.32 to rotate.

[0043] Based on this, when using this utility model for road cleaning operations, this utility model can achieve road cleaning by utilizing recirculated clean air without using high-pressure water to clean the road surface, and fully utilize the part of the power lost by the existing road sweeper during the cleaning process, thereby reducing the power of the road sweeper's cleaning system and achieving a higher energy efficiency ratio. At the same time, it can also save a lot of water resources.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air circulation cleaning system for a road sweeper using regenerated airflow technology, comprising an integrated blow-suction nozzle (1), a garbage bin (5), a gas-solid separation unit (4), and a centrifugal fan (3); characterized in that, The integrated blow-suction nozzle (1) includes a cleaning housing. An internal partition (1.14) is provided inside the cleaning housing, dividing the inner cavity of the cleaning housing into an air outlet chamber (1.25) and an air inlet chamber (1.24). The air outlet chamber (1.25) is located in the lower part of the inner cavity of the cleaning housing, with its lower end open and able to be flush against the ground. An air outlet is connected to the upper end of the air outlet chamber (1.25). The air inlet chamber (1.24) is located in the upper part of the inner cavity of the cleaning housing, with an air knife nozzle (1.24) provided at its lower end. 1.23), the air knife nozzle (1.23) is located in the rear of the inner cavity of the cleaning housing and is connected to the air outlet chamber (1.25); the upper end of the air inlet chamber (1.24) is connected to the air inlet; the upstream of the input end of the garbage bin (5) is connected to the air outlet of the integrated blow-suction nozzle (1) through the garbage input pipe (6); the inside and rear of the garbage bin (5) is the gas-solid separation unit (4); the gas output end of the gas-solid separation unit (4) is connected to the air inlet of the centrifugal fan (3); the air outlet of the centrifugal fan (3) is connected to the air inlet of the integrated blow-suction nozzle (1) through the air output pipe (2).

2. The air circulation cleaning system of the road sweeper using regenerated airflow technology according to claim 1, characterized in that, The cleaning housing includes an upper cover plate (1.1), a left side plate (1.4) is installed on the left side of the upper cover plate (1.1), a right side plate (1.2) is installed on the right side of the upper cover plate (1.1), and a middle partition plate (1.14) is connected between the left side plate (1.4) and the right side plate (1.2); a front outer rubber sheet (1.3) and a front inner rubber sheet (1.7) are installed sequentially from the outside to the inside on the front side of the upper cover plate (1.1); a rear baffle plate (1.18) is bent downward on the rear side of the upper cover plate (1.1), and a rear sealing strip (1.10) and a flow guiding strip (1.8) are installed sequentially from the back to the front on the lower end of the rear baffle plate (1.18), with the lower end of the flow guiding strip (1.8) tilted forward.

3. The air circulation cleaning system of the road sweeper using regenerated airflow technology according to claim 2, characterized in that, The front outer rubber (1.3) and the front inner rubber (1.7) are hinged to the front end of the upper cover plate (1.1) via the front rubber bracket (1.11). A forward tilting actuator (1.13) is provided between the front rubber bracket (1.11) and the upper cover plate (1.1).

4. The air circulation cleaning system of the road sweeper using regenerated airflow technology according to claim 1, characterized in that, The gas-solid separation unit (4) includes an airflow baffle (4.1), a filter screen (4.3), and a dust separation device (4.7). The upper end of the airflow baffle (4.1) is connected to the inner top wall of the garbage bin (5), the front end of the airflow baffle (4.1) is connected to the front side wall of the garbage bin (5), and the rear end of the airflow baffle (4.1) is connected to the rear side wall of the garbage bin (5). The filter screen (4.3) includes a vertical filter screen installed on the opposite side of the airflow baffle (4.1) and a vertical filter screen installed on the opposite side of the airflow baffle (4.1). The lower end is a horizontal filter screen; the garbage bin (5) has an air outlet (4.5) at a position higher than the horizontal filter screen. The air outlet (4.5) is located in the upper middle part of the front side wall of the garbage bin (5). A dust separation device (4.7) is installed on the outside of the air outlet (4.5). The gas output end of the dust separation device (4.7) is connected to the air inlet end of the centrifugal fan (3). The gas-solid separation unit (4) also includes an inlet guide plate (4.2) opened above the garbage input pipe (6) inside the garbage bin (5).

5. The air circulation cleaning system of the road sweeper using regenerated airflow technology according to claim 4, characterized in that, The dust separation device (4.7) includes a separation shell (4.71) installed on the outside of the garbage bin (5). The upper part of the separation shell (4.71) is provided with an air inlet (4.72), which is connected to the air outlet (4.5). The middle part of one side wall of the separation shell (4.71) is provided with an air outlet (4.74), which is connected to the air inlet (3.2) of the centrifugal fan (3). The lower part of one side wall of the separation shell (4.71) is provided with a dust collection chamber (4.716). The interior of the separation shell (4.71) is provided with an acceleration centrifugal channel (4.78), which is connected to the air inlet (4.72), the air outlet (4.74), and the dust collection chamber (4.716).

6. The air circulation cleaning system of the road sweeper using regenerated airflow technology according to claim 5, characterized in that, The separation shell (4.71) includes a left plate (4.73) and a right plate (4.76) arranged opposite to each other. A rear mounting plate (4.75) is connected between the rear sides of the left plate (4.73) and the rear sides of the right plate (4.76), and the rear mounting plate (4.75) is installed on the outer side of the front wall of the garbage bin (5). An arc-shaped shell (4.79) is connected between the front sides of the left plate (4.73) and the front sides of the right plate (4.76). The upper part of the arc-shaped shell (4.79) protrudes outward, and the lowest end of the arc-shaped shell (4.79) is connected to an inclined bottom plate (4.710). The second air outlet (4.74) is located in the middle of the left plate (4.73) and is equipped with an outlet pipe (4.77). An inlet arc plate (4.715) is provided on the upper part of the separation shell (4.71), and the inlet arc plate (4.715) is located at the second air outlet (4.74). Above, the inlet arc plate (4.715), the arc-shaped shell (4.79), the left plate (4.73), and the right plate (4.76) together form the second air inlet (4.72); below the inlet arc plate (4.715) is an arc-shaped guide plate (4.712), the arc-shaped guide plate (4.712), the arc-shaped shell (4.79), the left plate (4.73), and the right plate (4.76) together form the acceleration centrifugal channel (4.78); below the arc-shaped shell (4.79) is a dust guide plate (4.711), the gap between the dust guide plate (4.711) and the lower part of the arc-shaped guide plate (4.712), together with the left plate (4.73) and the right plate (4.76), forms the dust separation channel (4.714), and the bottom area of ​​the separation shell (4.71) is provided with a dust collection chamber (4.716).

7. The air circulation cleaning system of the road sweeper using regenerated airflow technology according to claim 6, characterized in that, An intermediate baffle (4.713) is provided on the inner middle of the separation shell (4.71) near the garbage bin (5). The intermediate baffle (4.713) is located between the inlet arc plate (4.715) and the arc-shaped guide plate (4.712).

8. The air circulation cleaning system of the road sweeper using regenerated airflow technology according to claim 6, characterized in that, The rear mounting plate (4.75) is installed on the front outer side wall of the garbage bin (5). A drain port is provided on the front outer side wall of the garbage bin (5) at a position corresponding to the lower part of the dust collection chamber (4.716). A latch plate (4.4) is hinged to the upper end of the drain port. A drain door (4.6) is provided on the rear side wall of the garbage bin (5).

9. The air circulation cleaning system of the road sweeper using regenerated airflow technology according to claim 1, characterized in that, The centrifugal fan (3) is provided with an air outlet (3.4) at the air outlet end, and a pressure relief device (3.3) is provided on the side wall of the air outlet (3.4).

10. The air circulation cleaning system of the road sweeper using regenerated airflow technology according to claim 9, characterized in that, The pressure relief device (3.3) includes a pressure relief window (3.31) on the side wall of the air outlet (3.4). A pressure relief mechanism (3.32) is hinged to the lower end of the pressure relief window (3.31). The pressure relief mechanism (3.32) is driven by a pressure relief drive mechanism (3.33). The pressure relief drive mechanism (3.33) can control the pressure relief mechanism (3.32) to be parallel to and fit against the side wall of the air outlet (3.4) where the pressure relief window (3.31) is located. The pressure relief drive mechanism (3.33) can also control the included angle between the pressure relief mechanism (3.32) and the side wall of the air outlet (3.4) where the pressure relief window (3.31) is located to be less than 90 degrees or 0 degrees.

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