A dust separation device for use in road sweepers

Abstract

This utility model provides a dust separation device for road sweepers, belonging to the field of road sweepers. It includes a housing with an air inlet at the top and an air outlet on one side wall. A dust collection chamber is located at the bottom of the housing. A centrifugal channel is provided inside the housing, with its input end connected to the air inlet, its middle section connected to the air outlet, and its lower section connected to the dust collection chamber. The advantages of this utility model are that it can separate dust from air using centrifugal force before the airflow enters the fan, thus solving the problem of dust adhering to the fan blades and affecting fan performance; and it does not require additional energy consumption, thereby greatly reducing costs.

Description

Technical Field

[0001] This utility model belongs to the field of road sweeper vehicles, specifically relating to a dust separation device applied to road sweeper vehicles. 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 primarily rely on the negative pressure generated by a rotating fan to suck up dust and garbage from the ground.

[0003] However, many existing road sweepers lack effective dust separation capabilities, leading to a serious problem: over long-term use, dust accumulates on the blower blades due to delayed cleaning. This dust gradually corrodes the blades, significantly impacting blower performance, preventing the blower from generating the necessary airflow and negative pressure, and in severe cases, rendering the blower unusable. Therefore, to address the impeller dust accumulation problem, existing road sweepers require frequent disassembly and maintenance of the blower casing, increasing maintenance frequency, reducing work efficiency, raising maintenance costs, and increasing the workload for workers.

[0004] In addition, although some road sweepers have begun to be equipped with dust removal structures to solve this problem, such as the sweeper disclosed in Chinese patent CN206784274U, which uses a motor to drive the filter screen to rotate and scrape off dust, the continuous operation of the motor in this method requires a certain amount of energy, which is not conducive to energy conservation and environmental protection. Utility Model Content

[0005] The purpose of this invention is to address the dust problem encountered by existing road sweepers during long-term use. It proposes and designs a dust separation device for road sweepers that can separate dust from air using centrifugal principles before the airflow enters the blower, thus solving the problem of dust adhering to the blower blades and affecting blower performance. Furthermore, it does not require additional energy consumption, thereby significantly reducing costs.

[0006] To achieve the above objectives, this utility model provides a dust separation device for road sweepers, comprising a housing with an air inlet at the top, an air outlet on one side wall, and a dust collection chamber at the bottom. A centrifugal channel is located inside the housing, with its input end connected to the air inlet, its middle section connected to the air outlet, and its lower section connected to the dust collection chamber. This utility model guides the airflow entering the housing through the centrifugal channel, converting the downward velocity of the air and dust into rotational velocity. The air and dust, with a certain initial rotational velocity, separate under centrifugal force after being guided by the centrifugal channel. The air flows through the air outlet to the road sweeper's fan, while the dust falls directly into the dust collection chamber, thus solving the problem of dust adhering to the fan blades and affecting fan performance. Furthermore, this utility model does not require additional energy, significantly reducing costs.

[0007] Furthermore, an upper guide plate is provided inside the shell. The upper guide plate has an inclined guide section above the air outlet and an upper arc-shaped guide section below the inclined guide section. The end of the inclined guide section near the upper arc-shaped guide section is inclined downward, and the upper arc-shaped guide section is curved towards the direction close to the inclined guide section. The air outlet is located on the concave side of the upper arc-shaped guide section. A lower guide plate is provided on the convex side of the upper arc-shaped guide section. The upper part of the lower guide plate is fixedly connected to the side wall of the shell. The middle part of the lower guide plate is opposite to the upper arc-shaped guide section. The lower part of the lower guide plate is located below the upper arc-shaped guide section and the air outlet. A horizontal baffle is provided between the lower part of the lower guide plate and the air outlet. A lower arc-shaped guide section is provided on the end of the horizontal baffle near the lower guide plate. The center of the lower arc-shaped guide section is located above the lower arc-shaped guide section, and the lower arc-shaped guide section is located below the upper arc-shaped guide section. The centrifugal channel is the space between the upper arc-shaped guide section and the lower guide plate. At this point, the present invention can guide the airflow entering the housing through the centrifugal channel formed between the upper and lower guide plates. Moreover, through the arc-shaped guiding effect of the upper guide plate, the air and dust move along the arc direction of the upper guide plate, so that the falling speed of the air and dust is converted into rotational speed, generating centrifugal force. Then, the air and dust with a certain initial rotational speed pass through the second guiding effect of the lower guide plate. Under the action of centrifugal force, the heavier dust will gradually move radially in the circumference. At this time, under the action of the horizontal baffle, the air flows from above the horizontal baffle and continues to rotate under the negative pressure of the fan connected at the air outlet before flowing out through the air outlet. The heavier dust flows along the gap between the lower guide plate and the horizontal baffle to the bottom of the horizontal baffle and finally falls into the dust collection chamber below.

[0008] Furthermore, the central angle of the upper arc-shaped guide section is an obtuse angle, while the central angle of the lower arc-shaped guide section is an acute or right angle, in order to ensure its guiding effect.

[0009] Furthermore, the lower guide vane is arc-shaped, and the upper arc-shaped guide section is located on the concave side of the lower guide vane to ensure its guiding effect.

[0010] Furthermore, the housing includes a front plate and a rear plate disposed opposite to each other. A left side plate is connected between the left side of the front plate and the left side of the rear plate, and a right side plate is connected between the right side of the front plate and the right side of the rear plate. An air inlet is disposed between the upper end of the front plate and the upper end of the rear plate, and an air outlet is disposed in the middle of the front plate or the middle of the rear plate. The upper end of the upper guide plate is fixedly connected to the left side plate, the front end of the upper guide plate is fixedly connected to the front plate, and the rear end of the upper guide plate is fixedly connected to the rear plate. The upper end of the lower guide plate is fixedly connected to the right side plate, the front end of the lower guide plate is fixedly connected to the front plate, and the rear end of the lower guide plate is fixedly connected to the rear plate. The left end of the horizontal baffle is fixedly connected to the left side plate, the front end of the horizontal baffle is fixedly connected to the front plate, and the rear end of the horizontal baffle is fixedly connected to the rear plate.

[0011] Furthermore, the housing includes a front plate and a rear plate arranged opposite to each other. A right side plate is connected between the right side of the front plate and the right side of the rear plate, and the right side plate is a vertical plate. A left side plate is connected between the left side of the front plate and the left side of the rear plate. The upper part of the left side plate is an outwardly convex arc-shaped portion, and the right end of the arc-shaped portion is located above the vertical plate. The air inlet is the gap between the right end of the arc-shaped portion and the top of the vertical plate. The lower part of the left side plate is an inclined portion, and the right end of the inclined portion slopes downward. The air outlet is located in the middle of the front plate or the middle of the rear plate. An inlet arc plate is curved inward and downward at the upper end of the vertical plate. The concave side of the arc plate faces the vertical plate. The inlet arc plate is located above the air outlet. An arc-shaped baffle is located below the inlet arc plate. The air outlet is located on the concave side of the arc-shaped baffle. The upper end of the arc-shaped baffle is fixedly connected to the lower surface of the inlet arc plate, and the lower end of the arc-shaped baffle is located below the air outlet. An arc-shaped guide plate is located below the air outlet. The air outlet is located on the concave side of the arc-shaped guide plate. The left end of the arc-shaped guide plate is fixedly connected to the left side plate, and the right end of the arc-shaped guide plate is located below the arc-shaped baffle. The centrifugal channel is the space between the arc-shaped part, the inlet arc plate, and the arc-shaped guide plate. At this point, the present invention can guide the airflow entering the shell through the centrifugal channel formed between the arc-shaped part, the inlet arc plate, and the arc-shaped guide plate. Moreover, through the arc-shaped guide effect of the arc-shaped part and the inlet arc plate, the air and dust move along the arc direction of the arc-shaped part, so that the falling speed of the air and dust is converted into rotational speed, generating centrifugal force. At this time, the air and dust with a certain initial rotational speed pass through the second guiding effect of the arc-shaped guide plate. Under the action of centrifugal force, the heavier dust will gradually move radially in the circumference. At this time, under the action of the arc-shaped baffle, the vertical plate and the intermediate baffle below, the air flows from the concave side of the arc-shaped baffle, and finally, under the negative pressure of the fan connected at the air outlet, it continues to rotate and flows out through the air outlet. The heavier dust is blocked by the vertical plate and the intermediate baffle below, and finally falls into the dust collection chamber below.

[0012] Furthermore, the front end of the inlet arc plate is fixedly connected to the front plate, and the rear end of the inlet arc plate is fixedly connected to the rear plate; the front end of the arc baffle is fixedly connected to the front plate, and the rear end of the arc baffle is fixedly connected to the rear plate; the front end of the arc guide plate is fixedly connected to the front plate, and the rear end of the arc guide plate is fixedly connected to the rear plate.

[0013] Furthermore, an intermediate baffle is provided on the inner side of the vertical plate. The intermediate baffle is located between the inlet arc plate and the arc-shaped guide plate and serves to block dust.

[0014] Furthermore, an air outlet pipe is provided on the outside of the air outlet.

[0015] Furthermore, a drain outlet is provided in the dust collection chamber at the lower part of the left side plate or the lower part of the right side plate. A latch plate is hinged to the upper end of the drain outlet, and the latch plate is in a vertical position under the action of gravity. When the road sweeper is in normal operation, since both the shell and the garbage bin are vertically set, the vertically set latch plate can close the drain outlet and prevent the collected dust from being discharged from the drain outlet. When the garbage bin of the road sweeper is tilted, since the shell tilts with the garbage bin, a certain angle will be formed between the shell and the vertically set latch plate, and the collected dust will be discharged through this angle.

[0016] As can be seen from the above technical solution, this utility model has the following advantages: This utility model can guide the airflow entering the housing through the centrifugal channel and convert the falling speed of air and dust into rotational speed. At this time, the air and dust with a certain initial rotational speed will separate under the action of centrifugal force after being guided by the centrifugal channel. The air will flow to the blower of the road sweeper through the air outlet, and the dust will fall directly into the dust collection chamber, thereby solving the problem of dust adhering to the blower blades and affecting the blower performance. At the same time, this utility model does not require the consumption of additional energy, thereby greatly reducing the cost. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model. Figure 1 (Read from front to back); Figure 2 This is a schematic diagram of the structure of Embodiment 1 of this utility model. Figure 2 (Looking from back to front); Figure 3This is a schematic diagram of airflow in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the structure after the front panel is hidden in Embodiment 2 of this utility model.

[0019] In the diagram: 1. Air inlet; 2. Front panel; 3. Air outlet; 4. Right side panel; 5. Rear panel; 6. Latch plate; 7. Left side panel; 8. Inclined guide section; 9. Upper arc-shaped guide section; 10. Upper guide plate; 11. Horizontal baffle; 12. Lower arc-shaped guide section; 13. Lower guide plate; 14. Centrifugal channel; 15. Arc-shaped section; 16. Inclined section; 17. Arc-shaped guide plate; 18. Arc-shaped baffle; 19. Middle baffle; 20. Vertical plate; 21. Inlet arc plate; 22. Air outlet pipe; 23. Dust collection chamber. Detailed Implementation

[0020] 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 of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0021] Example 1 like Figures 1 to 3 As shown, this embodiment provides a first dust separation device for use in a road sweeper, which includes a housing for mounting on a garbage bin. The housing includes a front plate 2 and a rear plate 5 arranged opposite to each other. A left side plate 7 is connected between the left side of the front plate 2 and the left side of the rear plate 5, and a right side plate 4 is connected between the right side of the front plate 2 and the right side of the rear plate 5.

[0022] Meanwhile, in this embodiment, an air inlet 1 is provided between the upper end of the front plate 2 and the upper end of the rear plate 5. The air inlet 1 is positioned opposite to the output port of the coarse air filtration structure inside the trash can and is used to introduce air into the housing of this embodiment. In this embodiment, an air outlet 3 is provided in the middle of the front plate 2 or the middle of the rear plate 5. In this embodiment, the space formed between the lower part of the front plate 2 and the lower part of the rear plate 5 is set as a dust collection chamber 23. A sewage outlet is provided on the lower part of the side plate near the discharge door of the garbage bin in the left side plate 7 and the right side plate 4. The upper end of the sewage outlet is hinged to a latch plate 6, and the latch plate 6 is in a vertical state under the action of gravity. In this way, when the road sweeper is in normal operation, since both the shell and the garbage bin are set vertically, the vertically set latch plate 6 can close the sewage outlet and prevent the collected dust from being discharged from the sewage outlet. When the garbage bin of the road sweeper is in an overturned state, since the shell is tilted with the garbage bin, a certain angle will be formed between the shell and the vertically set latch plate 6, and the collected dust will be discharged through this angle.

[0023] A centrifugal channel 14 is provided between the air inlet 1 and the air outlet 3. Specifically, in this embodiment, an upper guide plate 10 is provided inside the shell. The upper end of the upper guide plate 10 is fixedly connected to the left side plate 7, the front end of the upper guide plate 10 is fixedly connected to the front plate 2, and the rear end of the upper guide plate 10 is fixedly connected to the rear plate 5. Moreover, the upper guide plate 10 is provided with an inclined guide portion 8 above the air outlet 3 and an upper arc-shaped guide portion 9 below the inclined guide portion 8 in a direction away from the left side plate 7. The inclined guide portion 8 is inclined downward at one end near the upper arc-shaped guide portion 9, and the upper arc-shaped guide portion 9 is bent towards the inclined guide portion 8, ensuring that the air outlet 3 is located on the concave side of the upper arc-shaped guide portion 9. The central angle of the upper arc-shaped guide portion 9 is an obtuse angle. Meanwhile, in this embodiment, a lower guide plate 13 is also provided on the convex side of the upper arc-shaped guide section 9. The upper end of the lower guide plate 13 is fixedly connected to the right side plate 4, the front end of the lower guide plate 13 is fixedly connected to the front plate 2, and the rear end of the lower guide plate 13 is fixedly connected to the rear plate 5. The middle part of the lower guide plate 13 is opposite to the upper arc-shaped guide section 9, and the lower part of the lower guide plate 13 is located below the upper arc-shaped guide section 9 and the air outlet 3. Moreover, the shape of the lower guide plate 13 is arc-shaped, and the upper arc-shaped guide section 9 is located on the concave side of the lower guide plate 13 to ensure its guiding effect.

[0024] A horizontal baffle 11 is provided between the lower part of the lower guide plate 13 and the air outlet 3. A lower arc-shaped guide section 12 is provided on one end of the horizontal baffle 11 near the lower guide plate 13. The central angle of the lower arc-shaped guide section 12 is an acute angle or a right angle, and the center of the lower arc-shaped guide section 12 is located above it. The lower arc-shaped guide section 12 is located below the upper arc-shaped guide section 9. At this time, the centrifugal channel 14 is the space located between the upper arc-shaped guide section 9 and the lower guide plate 13.

[0025] Based on this, in this embodiment, the airflow entering the housing can be guided by the centrifugal channel 14 formed between the upper guide plate 10 and the lower guide plate 13. Moreover, after the arc-shaped guiding effect of the upper guide plate 10, the air and dust move along the arc direction of the upper guide plate 10, so that the falling speed of the air and dust is converted into rotational speed, generating centrifugal force. At this time, the air and dust with a certain initial rotational speed pass through the second guiding effect of the lower guide plate 13. Under the action of centrifugal force, the heavier dust will gradually move radially in the circumference. At this time, under the action of the horizontal baffle 11, the air flows from above the horizontal baffle 11 and continues to rotate under the negative pressure of the fan connected to the air outlet 3 before flowing out through the air outlet 3. The heavier dust flows along the gap between the lower guide plate 13 and the horizontal baffle 11 to the bottom of the horizontal baffle 11 and finally falls into the dust collection chamber 23 below.

[0026] Example 2 like Figure 4 , Figure 5 As shown, this embodiment 2 provides a second dust separation device for use in road sweepers, which includes a housing for mounting on a garbage bin. The housing includes a front plate 2 and a rear plate 5 arranged opposite to each other. A left side plate 7 is connected between the left side of the front plate 2 and the left side of the rear plate 5, and a right side plate 4 is connected between the right side of the front plate 2 and the right side of the rear plate 5.

[0027] The right side plate 4 is a vertical plate 20, and it is the side plate of the left side plate 7 and the right side plate 4 closest to the discharge gate of the garbage bin. The left side plate 7 is curved, specifically, as shown in... Figure 4 , Figure 5As shown, the upper part of the left side plate 7 is an outwardly convex arc-shaped portion 15, and the right end of the arc-shaped portion 15 is located above the vertical plate 20. The gap between the right end of the arc-shaped portion 15 and the top of the vertical plate 20 forms an air inlet 1. The air inlet 1 is positioned opposite to the output port of the coarse air filtration structure inside the garbage bin and is used to introduce air into the housing of this embodiment. The lower part of the left side plate 7 is an inclined portion 16. The right end of the inclined portion 16 slopes downward and is fixedly connected to the wall of the garbage bin. The space enclosed by the inclined portion 16, the lower part of the front plate 2, the lower part of the rear plate 5, and the lower part of the vertical plate 20 forms a dust collection chamber 23. Meanwhile, in this second embodiment, a drain outlet is provided at the lower part of the vertical plate 20, and a latch plate 6 is hinged to the upper end of the drain outlet. The latch plate 6 is in a vertical state under the action of gravity. In this way, when the road sweeper is in normal operation, since both the shell and the garbage bin are vertically set, the vertically set latch plate 6 can close the drain outlet and prevent the collected dust from being discharged from the drain outlet. When the garbage bin of the road sweeper is tilted, since the shell tilts with the garbage bin, a certain angle will be formed between the shell and the vertically set latch plate 6, and the collected dust will be discharged through this angle.

[0028] An air outlet 3 is provided in the middle of the front plate 2 or the middle of the rear plate 5, and an air outlet pipe 22 is provided on the outside of the air outlet 3.

[0029] In addition, in this second embodiment, an inlet arc plate 21 is bent inward and downward at the top of the vertical plate 20. The concave side of the inlet arc plate 21 faces the vertical plate 20 and is located above the air outlet 3. At the same time, the front end of the inlet arc plate 21 is fixedly connected to the front plate 2, and the rear end of the inlet arc plate 21 is fixedly connected to the rear plate 5. An arc-shaped baffle 18 is provided below the inlet arc plate 21. The front end of the arc-shaped baffle 18 is fixedly connected to the front plate 2, and the rear end of the arc-shaped baffle 18 is fixedly connected to the rear plate 5. The air outlet 3 is located on the concave side of the arc-shaped baffle 18. The upper end of the arc-shaped baffle 18 is fixedly connected to the lower surface of the inlet arc plate 21, and the lower end of the arc-shaped baffle 18 is located below the air outlet 3. In this second embodiment, an arc-shaped guide plate 17 is provided below the air outlet 3, and the air outlet 3 is located on the concave side of the arc-shaped guide plate 17. The left end of the arc-shaped guide plate 17 is fixedly connected to the left side plate 7, and the right end of the arc-shaped guide plate 17 is located below the arc-shaped baffle 18. An intermediate baffle 19 is provided on the inner side of the vertical plate 20, and the intermediate baffle 19 is located between the inlet arc plate 21 and the arc-shaped guide plate 17, thereby forming a centrifugal channel 14 through the space between the arc-shaped part 15 and the inlet arc plate 21 and the arc-shaped guide plate 17.

[0030] At this point, in this embodiment, the airflow entering the housing can be guided by the centrifugal channel 14 formed between the arc-shaped part 15, the inlet arc plate 21, and the arc-shaped guide plate 17. Moreover, through the arc-shaped guide effect of the arc-shaped part 15 and the inlet arc plate 21, the air and dust move along the arc direction of the arc-shaped part 15, converting the falling speed of the air and dust into rotational speed, generating centrifugal force. At this time, the air and dust with a certain initial rotational speed pass through the second-step guide effect of the arc-shaped guide plate 17. Under the action of centrifugal force, the heavier dust will gradually move radially in the circumference. At this time, under the action of the arc-shaped baffle 18, the vertical plate 20, and the intermediate baffle 19 described below, the air flows from the concave side of the arc-shaped baffle 18, and finally, under the negative pressure of the fan connected at the outlet 3, it continues to rotate and flows out through the outlet 3. The heavier dust is blocked by the vertical plate 20 and the intermediate baffle 19, and finally falls into the dust collection chamber 23 below.

[0031] 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. A dust separation device for use in road sweepers, comprising a housing, characterized in that, An air inlet (1) is provided at the upper part of the housing, an air outlet (3) is provided on one of the side walls of the housing, and a dust collection chamber (23) is provided at the lower part of the housing; a centrifugal channel (14) is provided inside the housing, the input end of the centrifugal channel (14) is connected to the air inlet (1), the middle part of the centrifugal channel (14) is connected to the air outlet (3), and the lower part of the centrifugal channel (14) is connected to the dust collection chamber (23).

2. The dust separation device for road sweepers according to claim 1, characterized in that, The interior of the casing is provided with an upper guide plate (10). The upper guide plate (10) is provided with an inclined guide section (8) above the air outlet (3) and an upper arc-shaped guide section (9) below the inclined guide section (8). The inclined guide section (8) is inclined downward at one end near the upper arc-shaped guide section (9), and the upper arc-shaped guide section (9) is bent toward the direction near the inclined guide section (8). The air outlet (3) is located on the concave side of the upper arc-shaped guide section (9). A lower guide plate (13) is provided on the convex side of the upper arc-shaped guide section (9). The upper part of the lower guide plate (13) is fixedly connected to the side wall of the casing. The middle part is opposite to the upper arc-shaped guide section (9), and the lower part of the lower guide plate (13) is located below the upper arc-shaped guide section (9) and the air outlet (3); a horizontal baffle (11) is provided between the lower part of the lower guide plate (13) and the air outlet (3), and a lower arc-shaped guide section (12) is provided at one end of the horizontal baffle (11) near the lower guide plate (13). The center of the lower arc-shaped guide section (12) is located above the lower arc-shaped guide section (12), and the lower arc-shaped guide section (12) is located below the upper arc-shaped guide section (9); the centrifugal channel (14) is the space between the upper arc-shaped guide section (9) and the lower guide plate (13).

3. The dust separation device for road sweepers according to claim 2, characterized in that, The central angle of the upper arc-shaped guide (9) is an obtuse angle, and the central angle of the lower arc-shaped guide (12) is an acute angle or a right angle.

4. The dust separation device for a road sweeper according to claim 2, characterized in that, The lower guide plate (13) is arc-shaped, and the upper arc-shaped guide part (9) is located on the concave side of the lower guide plate (13).

5. The dust separation device for a road sweeper according to claim 2, characterized in that, The housing includes a front plate (2) and a rear plate (5) arranged opposite to each other. A left side plate (7) is connected between the left side of the front plate (2) and the left side of the rear plate (5), and a right side plate (4) is connected between the right side of the front plate (2) and the right side of the rear plate (5). An air inlet (1) is located between the upper end of the front plate (2) and the upper end of the rear plate (5), and an air outlet (3) is located in the middle of the front plate (2) or the middle of the rear plate (5). The upper end of the upper guide plate (10) is fixedly connected to the left side plate (7). The front end of the upper guide plate (10) is fixedly connected to the front plate (2), and the rear end of the upper guide plate (10) is fixedly connected to the rear plate (5); the upper end of the lower guide plate (13) is fixedly connected to the right side plate (4), the front end of the lower guide plate (13) is fixedly connected to the front plate (2), and the rear end of the lower guide plate (13) is fixedly connected to the rear plate (5); the left end of the horizontal baffle (11) is fixedly connected to the left side plate (7), the front end of the horizontal baffle (11) is fixedly connected to the front plate (2), and the rear end of the horizontal baffle (11) is fixedly connected to the rear plate (5).

6. The dust separation device for a road sweeper according to claim 1, characterized in that, The housing includes a front plate (2) and a rear plate (5) arranged opposite to each other. A right side plate (4) is connected between the right side of the front plate (2) and the right side of the rear plate (5). The right side plate (4) is a vertical plate (20). A left side plate (7) is connected between the left side of the front plate (2) and the left side of the rear plate (5). The upper part of the left side plate (7) is an outwardly convex arc-shaped part (15). The right end of the arc-shaped part (15) is located above the vertical plate (20). The air inlet (1) is the gap between the right end of the arc-shaped part (15) and the top of the vertical plate (20). The lower part of the left side plate (7) is an inclined part (16). The right end of the inclined part (16) is inclined downward. The air outlet (3) is located in the middle of the front plate (2) or the middle of the rear plate (5). The upper end of the vertical plate (20) is bent inward and downward with an inlet arc plate (21). The concave side of the arc plate (20) is set towards the vertical plate (20). The inlet arc plate (21) is located above the outlet (3). An arc baffle (18) is set below the inlet arc plate (21). The outlet (3) is located on the concave side of the arc baffle (18). The upper end of the arc baffle (18) is fixedly connected to the lower surface of the inlet arc plate (21). The lower end of the arc baffle (18) is located below the outlet (3). An arc guide plate (17) is set below the outlet (3). The outlet (3) is located on the concave side of the arc guide plate (17). The left end of the arc guide plate (17) is fixedly connected to the left side plate (7). The right end of the arc guide plate (17) is located below the arc baffle (18). The centrifugal channel (14) is the space between the arc section (15) and the inlet arc plate (21) and the arc guide plate (17).

7. The dust separation device for a road sweeper according to claim 6, characterized in that, The front end of the inlet arc plate (21) is fixedly connected to the front plate (2), and the rear end of the inlet arc plate (21) is fixedly connected to the rear plate (5); the front end of the arc baffle (18) is fixedly connected to the front plate (2), and the rear end of the arc baffle (18) is fixedly connected to the rear plate (5); the front end of the arc guide plate (17) is fixedly connected to the front plate (2), and the rear end of the arc guide plate (17) is fixedly connected to the rear plate (5).

8. The dust separation device for a road sweeper according to claim 6, characterized in that, An intermediate baffle (19) is provided on the inner side of the vertical plate (20), and the intermediate baffle (19) is located between the inlet arc plate (21) and the arc-shaped guide plate (17).

9. The dust separation device for a road sweeper according to any one of claims 1-8, characterized in that, An air outlet pipe (22) is provided on the outside of the air outlet (3).

10. The dust separation device for a road sweeper according to any one of claims 1-8, characterized in that, The dust collection chamber (23) has a drain outlet located at the lower part of the left side plate (7) or the lower part of the right side plate (4), and a latch plate (6) is hinged to the upper end of the drain outlet.

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