Road sweeper

Abstract

The embodiment of the utility model provides a sweeper truck, and relates to the technical field of environmental sanitation. The utility model provides a road sweeping vehicle which comprises a road sweeping vehicle body, a suction nozzle, an air suction barrel, a filter screen assembly, a fan and a pulse injection assembly. The road sweeping vehicle body is provided with a containing box. The air inlet end of the air suction cylinder is connected with the suction nozzle, and the air outlet end of the air suction cylinder is connected with the containing box. The filter screen assembly is arranged in the containing box, and a filter cavity is formed in the containing box and used for filtering airflow entering the filter cavity. The fan is arranged on the sweeping vehicle body, and the air inlet end of the fan is communicated with the filtering cavity; and the pulse blowing assembly is arranged on the sweeping vehicle body and extends into the filtering cavity, and the pulse blowing assembly is used for periodically inputting airflow towards the filtering cavity, so that garbage adsorbed on the filter screen assembly falls into the containing box due to impact and vibration. The filter screen cleaning device has the effects that the filter screen is convenient to clean and the filter screen cleaning efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of sanitation technology, and more specifically, to a road sweeper. Background Technology

[0002] A road sweeper truck, also known as a sweeper-washer, sanitation truck, or vacuum truck, is a type of road cleaning vehicle. It typically uses a blower to draw debris from the ground through a suction nozzle into a garbage bin, where it is then filtered. This process cleans the debris and dust along the road's path, achieving the goal of cleaning municipal roads. However, the inventors discovered that during operation, some lightweight debris accumulates on the side of the filter facing the garbage bin, eventually clogging the filter completely. This leads to a sharp decrease in cleaning efficiency, increased energy consumption, and even equipment malfunction.

[0003] Currently, cleaning the filter screen requires stopping the sweeping operation and washing it separately with high-pressure water. This makes cleaning the filter screen time-consuming, labor-intensive, and inefficient. Utility Model Content

[0004] The purpose of this utility model is to provide a road sweeper that can facilitate the cleaning of the filter screen and improve the cleaning efficiency of the filter screen.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] This utility model provides a road sweeper, comprising:

[0007] The sweeper vehicle body has a container for holding garbage;

[0008] A suction nozzle is used to pick up litter from the street.

[0009] A suction tube is installed on the body of the sweeper vehicle, with the air inlet end connected to the suction nozzle and the air outlet end connected to the receiving box;

[0010] A filter assembly is disposed within the receiving box and forms a filter chamber within the receiving box. The filter assembly is used to filter the airflow entering the filter chamber.

[0011] A blower is installed on the body of the road sweeper, and the air inlet of the blower is connected to the filter chamber;

[0012] A pulse jet assembly is disposed on the sweeper body and extends into the filter chamber. The pulse jet assembly is used to periodically input airflow toward the filter chamber so that the garbage adsorbed on the filter assembly is impacted and vibrated and falls into the receiving box.

[0013] In an optional embodiment, the pulse jet assembly includes an air compressor, an air tank, a pulse valve, and a nozzle connected in sequence, with the nozzle extending into the filter chamber.

[0014] In an optional embodiment, the nozzle assembly further includes an air supply pipe and a venturi tube, the input end of the air supply pipe being connected to the output end of the pulse valve, the output end of the air supply pipe extending into the filter chamber, and the venturi tube being connected to the output end of the air supply pipe.

[0015] In an optional embodiment, the Venturi tube includes a guide tube, a connecting rib, and a gas guide cover. The guide tube is connected to the gas supply tube, and the gas guide cover is connected to the guide tube through the connecting rib. There is a gap between the guide tube and the gas guide cover. The gas guide cover has a tapered gas guide surface extending toward the guide tube, and a through hole is formed on the tapered gas guide surface.

[0016] In an optional implementation, the sweeper vehicle further includes:

[0017] A flushing assembly is disposed on the sweeper body and extends into the filter chamber. The flushing assembly is used to spray water toward the filter assembly for flushing.

[0018] In an optional embodiment, the flushing assembly includes a water tank, a water pump, a water valve, and a spray element connected in sequence, the spray element extending into the filter chamber.

[0019] In an optional embodiment, the spraying component further includes a water supply pipe and an adjusting component. The input end of the water supply pipe is connected to the output end of the water valve, and the output end of the water supply pipe extends into the filter chamber. The adjusting component is disposed at the output end of the water supply pipe and is used to make the water flow form a spray surface on the filter assembly.

[0020] In an optional embodiment, the spraying surface is circular;

[0021] Alternatively, the spray surface may be rectangular.

[0022] In an optional implementation, the sweeper vehicle further includes:

[0023] An air guide hood is disposed inside the receiving box and located between the air outlet of the suction tube and the filter chamber, for guiding the airflow carrying garbage drawn in by the suction tube to the receiving box.

[0024] In an optional embodiment, a pressure sensor is provided at the input end of the fan to detect the air pressure of the airflow entering the fan.

[0025] The road sweeper and its beneficial effects provided by this utility model embodiment include:

[0026] By installing a pulse jet cleaning component extending into the filter chamber within the sweeper vehicle, when debris clogs the filter, a relatively enclosed space is formed within the filter chamber. At this time, the pulse jet cleaning component periodically injects airflow into the filter chamber, which periodically increases the pressure within the filter chamber. Simultaneously, the periodically injected high-pressure airflow impacts the debris adhering to the filter, causing the debris to loosen and fall off, thus facilitating the cleaning of the filter. Furthermore, the cleaning of the filter can be performed during the sweeper's sweeping process, eliminating the need for separate cleaning time and improving cleaning efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a road sweeper provided in this embodiment;

[0029] Figure 2 This is a schematic diagram of the pulse jet cleaning assembly in the sweeper provided in this embodiment;

[0030] Figure 3 This is a schematic diagram of the structure of the pulse jet cleaning assembly in a road sweeper provided in some optional embodiments;

[0031] Figure 4 This is a schematic diagram of the structure of the Weng U-tube in the sweeper truck provided in this embodiment;

[0032] Figure 5 This is a schematic diagram of the flushing assembly in the sweeper provided in this embodiment;

[0033] Figure 6 This is a schematic diagram of the spray surface formed by the adjusting components in the sweeper provided in this embodiment;

[0034] Figure 7 A schematic diagram of the spray surface formed by the adjusting components in a sweeper vehicle provided in some optional embodiments;

[0035] Figure 8 A schematic diagram of the spray surface formed by the adjusting components in a sweeper provided for some alternative embodiments.

[0036] Icons: 100-Sweeper vehicle body; 110-Containment box; 200-Suction tube; 300-Filter assembly; 310-Filter chamber; 320-Spraying surface; 400-Fan; 500-Pulse jet assembly; 510-Air compressor; 520-Air tank; 530-Pulse valve; 531-Controller; 540-Air supply pipe; 550-Venturi tube; 551-Guide pipe; 552-Connecting rib; 553-Air guide hood; 554-Conical air guide surface; 600-Flushing assembly; 610-Water tank; 620-Water pump; 630-Water valve; 631-Control element; 640-Water supply pipe; 650-Adjusting component; 700-Air guide hood. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0042] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0043] A road sweeper, also known as a sweeper truck, sanitation truck, or vacuum truck, is a common type of vehicle used for road cleaning. The general operating procedure for a road sweeper is as follows: the power source drives a blower to rotate. Under the action of the blower, garbage on the road surface enters the garbage bin through the suction nozzle. Most of the garbage settles at the bottom of the bin, while a small amount of light debris and finer dust continues to pass through the filter and enter the blower before being discharged into the atmosphere. Due to the filter mesh, most light debris and fine dust are blocked on one side of the garbage bin. Especially for vehicles that need to spray water for dust suppression during operation, the garbage carried by the blower contains a large amount of moisture, which easily accumulates on the filter and eventually completely clogs it.

[0044] Once the filter becomes clogged, the cleaning efficiency will drop sharply and the energy consumption will increase. If the filter is not cleaned and the machine is forced to operate, the filter will be sucked up by the air pressure of the fan, which will allow large particles of garbage to enter the fan without obstruction. This can easily cause the fan impeller to become unbalanced and lead to more serious equipment failures.

[0045] In order to improve the problem of filter screen clogging in the above-mentioned related technologies, this utility model provides a road sweeper for cleaning up the garbage attached to and accumulated on the filter screen, so as to avoid the filter screen from becoming clogged.

[0046] The following describes in detail the overall structure, working principle, and technical effects of the road sweeper provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0047] Please refer to Figure 1 This utility model provides a road sweeper for cleaning ground garbage and can clean the filter screen to avoid filter screen blockage, which would affect the sweeper's cleaning efficiency and prevent internal equipment malfunctions.

[0048] The filter cleaning assembly provided in this utility model includes a sweeper body 100, a suction pipe 200, a filter assembly 300, and a blower 400. The sweeper body 100 has an internal receiving box 110 for holding garbage. The suction pipe 200 is tubularly installed on the sweeper body 100, with its air inlet extending towards the ground. A feed hopper for increasing the sweeping area is connected to the air inlet near the ground end of the suction pipe 200. The air outlet of the suction pipe 200 extends into the receiving box 110 inside the sweeper body 100. The filter assembly 300 is installed inside the receiving box 110. In this embodiment, the filter assembly 300 is located on top of the receiving box 110, and the filter assembly 300 and the top of the sweeper body 100 together form a filter chamber 310. The filter assembly 300 is used to filter the airflow entering the filter chamber 310 from the receiving box 110. A blower 400 is installed inside the sweeper vehicle body 100. The air inlet of the blower 400 is connected to the filter chamber 310, and the air outlet of the blower 400 is connected to the external environment to discharge the filtered airflow into the external environment. Furthermore, to clean the garbage adsorbed on the filter assembly 300 and prevent clogging, the filter cleaning assembly provided by this invention also includes a pulse jet assembly 500. The pulse jet assembly 500 is installed inside the sweeper vehicle body 100, and its output end extends into the filter chamber 310. The pulse jet assembly 500 is used to periodically input airflow into the filter chamber 310, causing the garbage adsorbed on the filter assembly 300 to be impacted and vibrated by the airflow and fall into the receiving box 110.

[0049] By installing a pulse jet assembly 500 extending into the filter chamber 310 within the sweeper body 100, when debris clogs the filter assembly 300, a relatively enclosed space is formed within the filter chamber 310. At this time, the pulse jet assembly 500 periodically injects airflow into the filter chamber 310, periodically increasing the pressure within the filter chamber 310. Simultaneously, the periodically injected airflow impacts the debris adhering to the filter assembly 300, causing it to loosen and fall off, thus facilitating cleaning of the filter assembly 300. Furthermore, cleaning of the filter assembly 300 can be performed during the sweeper's sweeping process, eliminating the need for separate cleaning time and improving cleaning efficiency.

[0050] Please refer to Figure 1 and Figure 2In this embodiment, the pulse jet assembly 500 includes an air compressor 510, an air tank 520, a pulse valve 530, and a nozzle assembly. The air compressor 510, air tank 520, pulse valve 530, and nozzle assembly are sequentially connected, and the nozzle assembly extends into the filter chamber 310. Compressed gas is generated by the air compressor 510 and stored in the air tank 520. The compressed gas is then periodically fed into the filter chamber 310 by the periodic opening and closing of the pulse valve 530. Further, in some alternative embodiments, a controller 531 is connected to the pulse valve 530 to control the opening and closing of the pulse valve 530.

[0051] Please refer to Figure 3 To enhance the impact of high-pressure gas into the filter chamber 310 on the debris on the filter assembly 300, thereby improving the cleaning effect of the filter assembly 300, in some alternative embodiments, the nozzle includes a gas supply pipe 540 and a venturi tube 550. The input end of the gas supply pipe 540 is connected to the output end of the pulse valve 530, and the output end of the gas supply pipe 540 extends into the filter chamber 310. The venturi tube 550 is connected to the output end of the gas supply pipe 540. The venturi tube 550 is a device based on the Venturi effect in fluid dynamics, which changes the gas flow rate and adjusts the pressure difference by changing the cross-sectional area of ​​the pipe. In this embodiment, the venturi tube 550 increases the gas flow rate at the end of the gas supply pipe 540, thereby enhancing the impact effect on the debris on the filter assembly 300.

[0052] Please refer to Figure 3 and Figure 4 Furthermore, in this embodiment, the Venturi tube 550 includes a guide tube 551, connecting ribs 552, and a gas guide shroud 553. The guide tube 551 is connected to the gas supply tube 540. Multiple connecting ribs 552 are evenly spaced around the guide tube 551 along its axial direction. The gas guide shroud 553 is connected to the guide tube 551 via the connecting ribs 552. There is a gap between the guide tube 551 and the gas guide shroud 553, and their centerlines coincide. The gas guide shroud 553 has a tapered gas guide surface 554 extending toward the guide tube 551. It is understandable that the gas flow rate is inversely proportional to the cross-sectional area of ​​the flow. However, due to the obstruction of the air guide shroud 553 to the output end of the guide tube 551, the flow area of ​​the airflow decreases when it exits from the guide tube 551, and the speed of the airflow increases when it exits from the guide tube 551. The conical air guide surface 554 on the air guide shroud 553 is used to guide the airflow to all directions so that the airflow can impact a larger area on the filter assembly 300, thereby improving the impact effect on the debris on the filter assembly 300.

[0053] Furthermore, through holes are provided on the air guide shroud 553. When the high-speed airflow rushes out from the guide pipe 551 toward the conical air guide surface 554, part of the airflow flows outwards along the conical air guide surface 554, and part of the airflow is ejected through the through holes. The two airflows together form a conical airflow to impact the filter assembly 300, thereby increasing the coverage area and impact effect of the airflow. This prevents the position on the filter assembly 300 opposite to the axis of the air guide shroud 553 from being unable to receive effective airflow impact due to the guiding effect of the conical air guide surface 554.

[0054] Please refer to Figure 5 To further improve the cleaning effect of the adsorbed garbage on the filter assembly 300, in some alternative embodiments, the filter cleaning device also includes a flushing assembly 600. The flushing assembly 600 is disposed inside the sweeper body 100, and its output end extends into the filter chamber 310. The flushing assembly 600 is used to spray water toward the filter assembly 300 to flush it. Further, in this embodiment, the flushing assembly 600 includes a water tank 610, a water pump 620, a water valve 630, and a spraying element connected in sequence. The spraying element extends into the filter chamber 310. Furthermore, a control element 631 connected to the water valve 630 can be provided to control the opening and closing of the water valve 630. By using the flushing assembly 600 extending into the filter chamber 310 to backwash the filter assembly 300, combined with the impact vibration of the pulse jet assembly 500 on the adsorbed garbage on the filter assembly 300, the cleaning effect of the filter assembly 300 is improved. Meanwhile, in this embodiment, the flushing component 600 adopts a method of backflushing the filter screen component 300 from inside the filter chamber 310, which improves the problem that when the filter screen component 300 is flushed from the outside in the traditional way, the water flow is difficult to remove the garbage from the filter screen component 300, and the water flow and garbage are easily carried into the fan 400.

[0055] It is understood that, in some alternative embodiments, a pressure sensor may also be installed at the air inlet of the fan 400 to detect the air pressure in the air path, thereby determining whether the filter assembly 300 is clogged. Furthermore, the pressure sensor can be connected to the controller 531 in the pulse jet assembly 500 and the control element 631 in the flushing assembly 600, thereby automatically controlling the operation of the pulse jet assembly 500 and the flushing assembly 600 through the system.

[0056] Please refer to Figure 5 To improve the rinsing effect on the filter assembly 300, in some alternative embodiments, the spraying component includes a water supply pipe 640 and an adjusting member 650. The input end of the water supply pipe 640 is connected to the output end of the water valve 630, and the output end of the water supply pipe 640 extends into the filter chamber 310. The adjusting member 650 is disposed at the output end of the water supply pipe 640 and is used to form a spray surface 320 on the filter assembly 300 by the water flow.

[0057] Please refer to Figure 6 In some alternative embodiments, the adjusting element 650 is a conical nozzle, and the water jet from the conical nozzle is cone-shaped, thereby forming a circular spray surface 320 on the filter assembly 300. (Refer to...) Figure 7 In some alternative embodiments, the adjusting element 650 can also be a fan-shaped nozzle. The water jet from the fan-shaped nozzle is fan-shaped and has a certain thickness at the end. A single fan-shaped nozzle forms a strip-shaped spray surface 320 on the filter assembly 300. By setting multiple fan-shaped nozzles, interconnected strip-shaped spray surfaces 320 are formed on the filter assembly 300, ultimately combining to form a rectangular spray surface 320 on the filter assembly 300. (Refer to...) Figure 8 In some alternative embodiments, the adjusting member 650 can also be configured as a rotating fan-shaped nozzle, and the strip spray surface 320 sweeps the filter screen assembly 300 when the rotating fan-shaped nozzle rotates. When the rotation axis is in the vertical direction, a circular spray surface 320 is finally formed on the filter screen assembly 300; when the rotation axis is in the horizontal direction, a rectangular spray surface 320 is finally formed on the filter screen assembly 300.

[0058] By setting the adjusting element 650, the water flow forms a rectangular or circular spray surface 320 on the filter assembly 300, thereby giving the water flow a larger coverage area on the filter assembly 300, and thus giving the rinsing assembly 600 a larger rinsing area on the filter assembly 300.

[0059] Please refer to Figure 1 In this embodiment, the road sweeper also includes an air guide hood 700, which is disposed inside the receiving box 110 and located between the air outlet of the suction tube 200 and the filter chamber 310. The air guide hood 700 is used to guide the airflow sucked in by the suction tube 200 downward, so as to prevent the airflow carrying garbage from flowing directly to the filter assembly 300, so as to guide the garbage sucked in by the suction tube 200 to the receiving box 110, thereby facilitating the deposition of garbage in the receiving box 110.

[0060] In summary, the implementation principle of the sweeper provided by this utility model is as follows: By installing a pulse jet assembly 500 extending into the filter chamber 310 within the sweeper body 100, when garbage clogs the filter assembly 300, a relatively enclosed space is formed within the filter chamber 310. At this time, the pulse jet assembly 500 periodically inputs airflow into the filter chamber 310, which periodically increases the pressure within the filter chamber 310. Simultaneously, the periodically input high-pressure airflow impacts the garbage adhering to the filter assembly 300, thereby loosening and dislodging the garbage adsorbed on the filter assembly 300, thus facilitating the cleaning of the filter assembly 300. Furthermore, the cleaning of the filter assembly 300 can be performed during the sweeper's sweeping process, eliminating the need for separate cleaning time and improving cleaning efficiency.

[0061] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A road sweeper, characterized in that, include: The sweeper vehicle body (100) has a container (110) for holding garbage; A suction nozzle is used to pick up litter from the street. A suction tube (200) is installed on the body (100) of the sweeper vehicle. The air inlet end of the suction tube (200) is connected to the suction nozzle, and the air outlet end is connected to the receiving box (110). A filter assembly (300) is disposed within the receiving box (110) and forms a filter chamber (310) within the receiving box (110). The filter assembly (300) is used to filter the airflow entering the filter chamber (310). A blower (400) is installed on the sweeper vehicle body (100), and the air inlet of the blower (400) is connected to the filter chamber (310); A pulse jet assembly (500) is disposed on the sweeper body (100) and extends into the filter chamber (310). The pulse jet assembly (500) is used to periodically input airflow toward the filter chamber (310) so that the garbage adsorbed on the filter assembly (300) is impacted and vibrated and falls into the receiving box (110).

2. A road sweeper according to claim 1, characterized in that, The pulse jet assembly (500) includes an air compressor (510), an air tank (520), a pulse valve (530), and a nozzle connected in sequence, with the nozzle extending into the filter chamber (310).

3. A road sweeper according to claim 2, characterized in that, The nozzle assembly includes an air supply pipe (540) and a venturi tube (550). The input end of the air supply pipe (540) is connected to the output end of the pulse valve (530), and the output end of the air supply pipe (540) extends into the filter chamber (310). The venturi tube (550) is connected to the output end of the air supply pipe (540).

4. A road sweeper according to claim 3, characterized in that, The Venturi tube (550) includes a guide tube (551), a connecting rib (552), and a gas guide cover (553). The guide tube (551) is connected to the gas supply tube (540). The gas guide cover (553) is connected to the guide tube (551) through the connecting rib (552), and there is a gap between the guide tube (551) and the gas guide cover (553). The gas guide cover (553) has a conical gas guide surface (554) extending toward the guide tube (551), and a through hole is provided on the conical gas guide surface (554).

5. A road sweeper according to claim 1, characterized in that, The road sweeper also includes: A flushing assembly (600) is disposed on the sweeper body (100) and extends into the filter chamber (310). The flushing assembly (600) is used to spray water toward the filter assembly (300) for flushing.

6. A road sweeper according to claim 5, characterized in that, The flushing assembly (600) includes a water tank (610), a water pump (620), a water valve (630), and a sprayer connected in sequence, the sprayer extending into the filter chamber (310).

7. A road sweeper according to claim 6, characterized in that, The spraying component also includes a water supply pipe (640) and an adjusting component (650). The input end of the water supply pipe (640) is connected to the output end of the water valve (630), and the output end of the water supply pipe (640) extends into the filter chamber (310). The adjusting component (650) is disposed at the output end of the water supply pipe (640) and is used to make the water flow form a spray surface (320) on the filter assembly (300).

8. A road sweeper according to claim 7, characterized in that, The spray surface (320) is circular; Alternatively, the spray surface (320) may be rectangular.

9. A road sweeper according to any one of claims 1-8, characterized in that, The road sweeper also includes: An air guide hood (700) is disposed inside the receiving box (110) and located between the air outlet of the suction tube (200) and the filter chamber (310) to guide the airflow carrying garbage sucked in by the suction tube (200) to the receiving box (110).

10. A road sweeper according to any one of claims 1-8, characterized in that, The input end of the fan (400) is equipped with a pressure sensor to detect the air pressure of the airflow entering the fan (400).

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