Dust removal system

Abstract

The utility model discloses a dust removal system which comprises a rack, the gas purifying mechanism is provided with a waste gas inlet and a purified gas outlet; the dust collection cover is arranged on the rack, a dust collection cavity facing forwards is formed in the dust collection cover in a surrounding mode, an air suction port is formed in the rear side of the dust collection cover and communicates with the waste gas inlet through a pipeline, and an air blowing nozzle capable of moving in the up-down direction and the left-right direction is arranged in the dust collection cover; according to the automatic cleaning device, negative pressure is formed after equipment to be cleaned is covered and surrounded by the dust suction hood, then air is automatically blown to the surface of the equipment to be cleaned for cleaning, the convenience and efficiency of cleaning are improved, the phenomenon that dust flies outwards during air blowing cleaning is effectively reduced, and pollution to the environment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cleaning instrument especially to a dust removal system. BACKGROUND

[0002] When blowing and cleaning the tail of a car and the like, a cleaning personnel usually holds a jet gun and the like to directly spray gas on the surface of the cleaning object, which causes dust to fly to the surroundings and pollute the surroundings, and the cleaning personnel is likely to directly inhale the dust and affect health. SUMMARY

[0003] The utility model aims at providing a dust removal system to solve one or more technical problems in the prior art and at least provide a beneficial choice or create conditions.

[0004] The utility model solves the technical problem by the following solution:

[0005] A dust removal system comprises a rack, a gas purification mechanism with a waste gas inlet and a purified gas outlet, a dust suction cover arranged on the rack, a dust suction cavity formed in the dust suction cover and facing forward, a suction port arranged on the rear side of the dust suction cover, the suction port being connected to the waste gas inlet through a pipeline, a gas blowing nozzle arranged in the dust suction cover and movable in the up-down and left-right directions, and the gas blowing nozzle being connected to the purified gas outlet through a pipeline.

[0006] The technical solution has at least the following beneficial effects: when the tail of a car and the like needs to be blown and cleaned, the rack is moved close to the tail of the car and the like, the tail of the car and the like is relatively moved into the dust suction cavity formed by the dust suction cover, the dust suction cover is used to surround the outer surface of the cleaning object, the dust suction cavity is suctioned from the suction port, a negative pressure is formed in the dust suction cavity, the gas blowing nozzle in the dust suction cover is moved in the up-down and left-right directions to blow and clean the outer surface of the cleaning object, the cleaned gas is suctioned from the suction port in the dust suction cover and sent into the gas purification mechanism to purify the gas, the dust suction cover is used to surround the cleaning object to form a negative pressure, the surface of the cleaning object is automatically blown and cleaned, the convenience and efficiency of cleaning are improved, the phenomenon of dust flying out during blowing and cleaning is effectively reduced, and the pollution to the environment is reduced.

[0007] As a further improvement of the above technical solution, the rack is provided with an adjusting driving element, the adjusting driving element is drivingly connected with the dust cover, and the adjusting driving element can drive the dust cover to move up and down. In use, the height of the dust cover can be adjusted by driving the dust cover to move up and down by the adjusting driving element, so that the dust cover can be aligned with the equipment to be cleaned, and then the rack can be moved close to the equipment to be cleaned. In this way, the dust cover can be easily moved into position, and the convenience of surrounding the dust cover around the equipment to be cleaned is improved.

[0008] As a further improvement of the above technical solution, the air blowing nozzle comprises a connecting seat, an air inlet head, an air pipe, a motor and an air blowing pipe. The connecting seat is arranged in the dust cover. The air inlet head and the motor are connected to the connecting seat. The air inlet head is provided with a first air inlet and a second air inlet. The air pipe is rotatably connected to the connecting seat. The motor is drivingly connected to the air pipe. One end of the air pipe is connected to the first air inlet. The second air inlet is connected to the clean air outlet through a pipeline. The air blowing pipe is connected to the end of the air pipe away from the air inlet head. The air blowing pipe extends obliquely away from the center line of the air pipe. The clean air outlet sends the purified gas to the air inlet head. The gas is input to the air blowing pipe through the air inlet head and the air pipe, and finally sprayed from the air blowing pipe to the surface of the equipment to be cleaned, realizing air blowing cleaning. At this time, the angle of the air flow blown out of the air blowing pipe is a fixed angle. When it is necessary to change the air blowing angle or increase the air blowing coverage, the air blowing pipe is rotated by the motor. Since the air blowing pipe extends obliquely away from the center line of the air pipe, the air blowing angle of the air blowing pipe changes when it is rotated. When the air blowing pipe is continuously rotated, the air blowing coverage of the air blowing pipe can be increased. In this way, the flexibility and effect of air blowing cleaning can be improved.

[0009] As a further improvement of the above technical solution, the rear side of the dust cover is recessed with a transition groove. The air inlet is formed at the groove bottom of the transition groove. The groove opening of the transition groove is connected with a screen. When the air in the dust cover enters the air inlet, it first passes through the screen at the groove opening of the transition groove. The screen first blocks the foreign matter sucked in, which is helpful to prevent the foreign matter from blocking the air inlet. The airflow after passing through the screen enters the air inlet from the transition groove. In this way, the stability of the negative pressure formed in the dust cover can be improved.

[0010] As a further improvement of the above technical solution, the front side of the dust cover is detachably connected with an outward expansion cover. When the equipment to be cleaned enters the dust cover, the outward expansion cover is close to the equipment to be cleaned to surround and enclose the equipment to be cleaned. In actual use, the outward expansion cover can be disassembled and replaced according to different equipment shapes. In this way, different equipment shapes can be better adapted, and dust blowing out can be reduced.

[0011] As a further improvement of the above technical solution, the air inlet has a larger air intake than the air outlet of the air blowing nozzle. During operation, the dust cover forms a negative pressure through the air inlet. Since the air intake of the air inlet is larger than the air outlet of the air blowing nozzle, the air intake for forming the negative pressure is larger than the air outlet for blowing and cleaning the equipment to be cleaned. At this time, air still needs to enter the dust cover from the surroundings, effectively preventing dust from being blown out.

[0012] As a further improvement of the above technical solution, the rear side of the dust cover is connected with a lifting drive, the lifting drive is drivingly connected with a lifting seat, the lifting seat extends into the dust cover, the lifting drive drives the lifting seat to move up and down, the lifting seat is connected with a translation drive, the translation drive is drivingly connected with the air blowing nozzle, and the translation drive drives the air blowing nozzle to move left and right. The lifting drive is arranged at the rear side of the dust cover, which is beneficial to reduce the influence of dust on the lifting drive. During operation, the lifting drive provides a driving force for the air blowing nozzle to move in the up-down direction, and the translation drive provides a driving force for the air blowing nozzle to move in the left-right direction. The air blowing nozzle can be moved in the up-down and left-right directions, so that the air blowing nozzle can automatically clean the surface of the object to be cleaned.

[0013] As a further improvement of the above technical solution, the air purification mechanism includes a machine box, an air blowing fan and a filter cartridge. The machine box is connected to the machine frame. The machine box forms a filter cavity and an air outlet cavity which are separated from each other. The filter cartridge is connected to the filter cavity. The middle part of the filter cartridge is in communication with the air outlet cavity. The waste gas inlet is formed on one side of the filter cavity. The purified air outlet is formed on one side of the air outlet cavity. The air blowing fan is arranged on the pipeline between the air blowing nozzle and the purified air outlet. During operation, the air blowing fan is started to draw air from the air outlet cavity. The air in the dust cover enters the filter cavity through the pipeline from the waste gas inlet. After being adsorbed and filtered by the filter cartridge, the air enters the middle part of the filter cartridge. Then, the air enters the air outlet cavity from the middle part of the filter cartridge. Finally, the purified air is input to the air blowing nozzle from the purified air outlet in the air outlet cavity. In this way, the cleaned air can be adsorbed and filtered for recycling.

[0014] As a further improvement of the above technical solution, an exhaust cavity is formed in the machine box. An exhaust fan is arranged in the exhaust cavity. The air inlet end of the exhaust fan is in communication with the air outlet cavity. An exhaust port is arranged on the exhaust cavity and is in communication with the air outlet end of the exhaust fan. During operation, the exhaust fan is started to draw air from the air outlet cavity. At this time, the negative pressure formed in the air outlet cavity can be increased to improve the negative pressure air intake effect. The purified air can be directly discharged from the machine box through the exhaust fan to maintain the air pressure balance in the machine box. This is especially suitable for the case where the negative pressure air intake is large.

[0015] As a further improvement to the above technical solution, casters are provided on the bottom side of the frame. During use, the entire unit can be moved using the casters on the bottom side of the frame, thereby improving the ease of alignment and connection with the equipment to be cleaned. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional view of the entire utility model.

[0018] Figure 2 yes Figure 1 A magnified view of part A.

[0019] Figure 3 This is a rear view of the present invention.

[0020] Figure 4 yes Figure 3 A schematic diagram of the BB cross-sectional structure.

[0021] In the attached diagram: 100-frame, 110-adjustment drive component, 120-pulley, 210-chassis, 211-exhaust gas inlet, 212-clean gas outlet, 220-blowing fan, 230-filter cartridge, 240-exhaust fan, 300-dust hood, 310-blowing nozzle, 311-connecting seat, 312-air inlet, 313-ventilation pipe, 314-motor, 315-blowing pipe, 320-transition groove, 321-partition screen, 330-outer expansion cover, 341-lifting drive component, 342-lifting seat, 343-translation drive component. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Reference Figures 1 to 4 A dust removal system includes a frame 100, a purification mechanism, and a dust collection hood 300. The purification mechanism has an exhaust gas inlet 211 and a clean gas outlet 212. The dust collection hood 300 is mounted on the frame 100 and has a forward-facing suction chamber. An air intake is located on the rear side of the dust collection hood 300 and is connected to the exhaust gas inlet 211 via a pipe. An air nozzle 310 movable in the up-down and left-right directions is located inside the dust collection hood 300 and is connected to the clean gas outlet 212 via a pipe.

[0027] As described above, when it is necessary to clean the rear of a car or other equipment by blowing air, the frame 100 is moved close to the rear of the car or other equipment, so that the rear of the car or other equipment is relatively inside the suction chamber formed by the dust hood 300. At this time, the dust hood 300 covers and surrounds the surface of the equipment to be cleaned, and air is drawn into the suction chamber from the air inlet, so that a negative pressure is formed inside the suction chamber. Then, the air nozzle 310 inside the dust hood 300 moves in the up-down and left-right directions to blow air to clean the surface of the equipment to be cleaned. The cleaned air is drawn into the air inlet inside the dust hood 300 and sent to the air purification mechanism for air purification. In this way, the dust hood 300 covers and surrounds the equipment to be cleaned to form a negative pressure, and then automatically blows air to clean its surface, which improves the convenience and efficiency of cleaning, and effectively reduces the phenomenon of dust being blown out during air cleaning, thus reducing environmental pollution.

[0028] For different devices to be cleaned, their heights vary. In order to facilitate the alignment of the vacuum hood 300 with them, in this embodiment, the frame 100 is provided with an adjustment drive 110. The adjustment drive 110 drives the vacuum hood 300 and can move the vacuum hood 300 up and down. In practical applications, the adjustment drive 110 is mainly used to provide driving force for movement in the up and down direction. Its structural form is various, such as cylinder, electric screw or hydraulic cylinder. In order to improve the structural stability of the vacuum hood 300, a vertical frame is formed on the frame 100. The vacuum hood 300 is slidably connected to the vertical frame through the cooperation of slide rail and slide groove, thereby improving the stability of the vacuum hood 300 sliding up and down. In use, the height of the dust hood 300 can be adjusted by moving the drive component 110 up and down, so that the dust hood 300 is directly facing the equipment to be cleaned. Then the frame 100 can be moved closer to the equipment to be cleaned. This makes it easy to move the dust hood 300 into position and improves the convenience of surrounding and covering the equipment to be cleaned.

[0029] In the above embodiment, the air nozzle 310 blows air in a fixed direction during operation. However, in actual use, due to the shape of the object's surface, the air nozzle 310 with a fixed airflow direction has the problem of difficulty in cleaning the object's surface thoroughly. Therefore, in order to improve the air blowing cleaning effect of the air nozzle 310, in this embodiment, the air nozzle 310 includes a connecting seat 311, an air inlet 312, an air pipe 313, a motor 314, and an air blowing pipe 315. The connecting seat 311 is disposed inside the dust collection hood 300, and the air inlet 312 is connected to the motor 314 on the connecting seat 311. The air inlet 312 is provided with a first air inlet and a second air inlet. The ventilation pipe 313 is rotatably connected to the connecting seat 311. The ventilation pipe 313 can be rotatably connected to the connecting seat 311 via a bearing. The rotation axis of the ventilation pipe 313 extends in the front-back direction. The motor 314 drives the ventilation pipe 313. The motor 314 can be driven by the ventilation pipe 313 via a transmission belt. One end of the ventilation pipe 313 is connected to the first air inlet. The second air inlet is connected to the clean air outlet 212 via a pipeline. The blowing pipe 315 is connected to the end of the ventilation pipe 313 away from the air inlet 312. The blowing pipe 315 extends obliquely in a direction deviating from the center line of the ventilation pipe 313. The purified gas outlet 212 draws the purified gas to the air inlet 312. The gas passes through the air inlet 312 and the air pipe 313 and is input into the air blowing pipe 315. Finally, it is sprayed out from the air blowing pipe 315 onto the surface of the equipment to be cleaned, thus achieving air blowing cleaning. At this time, the angle of the airflow blown out from the air blowing pipe 315 is a fixed angle. When it is necessary to change the blowing angle or increase the blowing coverage area, the air blowing pipe 315 is rotated by the motor 314. Since the air blowing pipe 315 extends at an angle deviating from the center line of the air pipe 313, its jet angle also changes when the air blowing pipe 315 rotates. When the air blowing pipe 315 is continuously rotated, the blowing coverage area of ​​the air blowing pipe 315 can be increased, thus improving the flexibility and effectiveness of air blowing cleaning.

[0030] When air is drawn into the dust collection hood 300 from the suction port, a transition groove 320 is recessed on the rear side of the dust collection hood 300 to prevent foreign objects from entering the suction port and blocking the suction pipe. The suction port is formed at the bottom of the transition groove 320, and a mesh 321 is connected to the opening of the transition groove 320. When the air in the dust collection hood 300 enters the suction port, it first passes through the mesh 321 at the opening of the transition groove 320. The mesh 321 first blocks the intake of foreign objects, which helps to prevent foreign objects from blocking the suction port. The airflow after passing through the mesh 321 enters the suction port from the transition groove 320. This helps to improve the stability of the negative pressure formed inside the dust collection hood 300.

[0031] To improve versatility in cleaning different devices, in this embodiment, an expansion cover 330 is detachably connected to the front side of the vacuum hood 300. The expansion cover 330 can be detachably connected to the vacuum hood 300 in various ways, such as by clips or screws. The expansion cover 330 is a cover connected to the front side of the vacuum hood 300. The sidewalls of the expansion cover 330 can be designed to be inclined, creating a space that gradually expands forward within the expansion cover 330, facilitating air intake and alignment with external devices. When the device to be cleaned enters the vacuum chamber, the expansion cover 330 approaches and surrounds the device. In actual use, the expansion cover 330 can be disassembled and replaced according to the shape of different devices, thus better adapting to different device shapes and reducing dust scattering.

[0032] When the air intake from the suction port is equal to the air output from the blower nozzle 310, outside air easily enters and exits the dust collection hood 300, and dust easily escapes. To further prevent dust from being blown out of the dust collection hood 300, in this embodiment, the air intake from the suction port is greater than the air output from the blower nozzle 310. During operation, a negative pressure is created inside the dust collection hood 300 through the suction port. Since the air intake from the suction port is greater than the air output from the blower nozzle 310, the suction volume creating the negative pressure is greater than the air output from the blower nozzle 310 for cleaning the equipment. At this time, air still needs to enter the dust collection hood 300 from all sides to effectively prevent dust from being blown out. In practical applications, the ratio of the air intake from the suction port to the air output from the blower nozzle 310 can be 1.5 to 2 times, for example, 2 times, to create a negative pressure environment around the dust collection hood 300.

[0033] A drive source is provided inside the dust hood 300 to drive the air nozzle 310 to move in the up-down and left-right directions. In this embodiment, a lifting drive component 341 is connected to the rear side of the dust hood 300. The lifting drive component 341 drives and connects to the lifting seat 342. The lifting seat 342 extends into the dust hood 300. The lifting drive component 341 can drive the lifting seat 342 to move up and down. A translation drive component 343 is connected to the lifting seat 342. The translation drive component 343 drives and connects to the air nozzle 310. That is, the connecting seat 311 is connected to the translation drive component 343. The translation drive component 343 can drive the air nozzle 310 to move left and right. The lifting drive component 341 and the translation drive component 343 can generate driving forces to move in a straight line. There are various structural forms. For example, the lifting drive component 341 and the translation drive component 343 can be cylinders, hydraulic cylinders, or electric lead screws. The lifting drive 341 is positioned behind the dust hood 300, which helps to reduce the impact of dust on the lifting drive 341. During operation, the lifting drive 341 provides a driving force for the air nozzle 310 to move in the up and down direction, and the translation drive 343 provides a driving force for the air nozzle 310 to move in the left and right direction. This allows the air nozzle 310 to move in the up and down and left and right directions, so that the air nozzle 310 can automatically spray air to clean the surface of the object to be cleaned.

[0034] The air purification mechanism is used to filter and purify cleaned gas, thereby reducing pollution to the external environment. As a specific structure of the air purification mechanism, the air purification mechanism includes a housing 210, a blower 220, and a filter cartridge 230. The housing 210 is connected to the frame 100. The housing 210 forms a filter chamber and an exhaust chamber that are separated from each other. The filter cartridge 230 is connected to the filter chamber. The filter cartridge 230 is a structure formed by a filter material arranged in a cylindrical shape and its bottom is closed. The middle part of the filter cartridge 230 is connected to the exhaust chamber. The exhaust gas inlet 211 is formed on one side of the filter chamber, and the clean gas outlet 212 is formed on one side of the exhaust chamber. The blower 220 is arranged on the pipeline between the blower nozzle 310 and the clean gas outlet 212. During operation, the blower 220 starts and draws air from the exhaust chamber. The air in the dust collection hood 300 enters the filter chamber through the pipeline from the exhaust inlet 211. After being adsorbed and filtered by the filter cartridge 230, the air enters the middle of the filter cartridge 230 and then enters the exhaust chamber from the middle of the filter cartridge 230. The purified air is then fed from the exhaust chamber through the clean air outlet 212 to the blower nozzle 310. In this way, the cleaned air can be adsorbed, filtered, and recycled.

[0035] In practical applications, to facilitate cleaning of the filter cartridge 230, a backflush air pipe 315 can be installed inside the filter cartridge 230. An air tank is connected to the frame 100, and the air tank and the backflush air pipe 315 are interconnected. When it is necessary to clean the filter cartridge 230, the air tank can be used to provide high-pressure air to the backflush air pipe 315, thereby blowing high-pressure air into the filter cartridge 230 to blow off the dust and debris adsorbed on the surface of the filter cartridge 230, ensuring the filtration and purification effect of the filter cartridge 230 after long-term use.

[0036] After purification by the air purification mechanism, the gas can be completely returned to the air nozzle 310 through the pipeline for repeated air cleaning of the object surface. When the intake volume is greater than the output volume, active exhaust is required inside the casing 210 to ensure pressure balance inside the casing 210. Therefore, in this embodiment, an exhaust chamber is formed inside the casing 210, and an exhaust fan 240 is installed inside the exhaust chamber. The inlet end of the exhaust fan 240 is connected to the outlet chamber, and an exhaust valve connected to the outlet end of the exhaust fan 240 is provided on the exhaust chamber. In practical applications, openings can be directly provided on the upper and lower sides of the exhaust chamber. The air inlet of the exhaust fan 240 is directly connected to the bottom side of the exhaust chamber, with the air inlet of the exhaust fan 240 directly facing the opening on the bottom side of the exhaust chamber, thus connecting the air inlet of the exhaust fan 240 to the exhaust chamber. The air outlet of the exhaust fan 240 is directly connected to the bottom side of the exhaust chamber, with the air outlet of the exhaust fan 240 directly facing the opening on the top side of the exhaust chamber, allowing the exhaust fan 240 to directly discharge air to the outside of the casing 210. During operation, the exhaust fan 240 starts and draws air from the exhaust chamber. This increases the negative pressure formed in the exhaust chamber, improving the negative pressure intake effect. Furthermore, the exhaust fan 240 can directly discharge the purified gas to the casing 210, maintaining the air pressure balance inside the casing 210, which is especially suitable for situations with a large negative pressure intake volume.

[0037] To facilitate overall movement, in this embodiment, the frame 100 is provided with pulleys 120 on its bottom side. In practical applications, there may be multiple pulleys 120, for example, four pulleys 120 arranged in a rectangular pattern on the bottom side of the frame 100. During use, the entire unit can be moved using the pulleys 120 on the bottom side of the frame 100, thereby improving the ease of alignment and connection with the equipment to be cleaned.

[0038] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A dust extraction system characterised in that: The utility model relates to a dust collection device, including: a rack (100); a clean gas mechanism with a waste gas inlet (211) and a clean gas outlet (212); a dust collection cover (300) arranged on the rack (100), a dust collection cavity facing forward is formed in the dust collection cover (300), a suction port is arranged on the rear side of the dust collection cover (300), the suction port is communicated with the waste gas inlet (211) through a pipeline, a blowing nozzle (310) capable of moving in the up-down and left-right directions is arranged in the dust collection cover (300), and the blowing nozzle (310) is communicated with the clean gas outlet (212) through a pipeline.

2. A dust extraction system according to claim 1, wherein: An adjusting driving element (110) is arranged on the rack (100), the adjusting driving element (110) is drivingly connected with the dust collection cover (300), and the adjusting driving element (110) can drive the dust collection cover (300) to move up and down.

3. A dust extraction system according to claim 1, wherein: The blowing nozzle (310) comprises a connecting seat (311), a gas connection head (312), an air pipe (313), a motor (314) and a blowing pipe (315), the connecting seat (311) is arranged in the dust collection cover (300), the gas connection head (312) and the motor (314) are connected to the connecting seat (311), the gas connection head (312) is provided with a first gas connection port and a second gas connection port, the air pipe (313) is rotationally connected in the connecting seat (311), the motor (314) is drivingly connected with the air pipe (313), one end of the air pipe (313) is connected to the first gas connection port, the second gas connection port is communicated with the clean gas outlet (212) through a pipeline, the blowing pipe (315) is connected to one end of the air pipe (313) away from the gas connection head (312), and the blowing pipe (315) extends obliquely in a direction deviating from the center line of the air pipe (313).

4. A dust extraction system according to claim 1, wherein: A transition groove (320) is concavely arranged on the rear side of the dust collection cover (300), the suction port is formed in the groove bottom of the transition groove (320), and the groove opening of the transition groove (320) is connected with a screen (321).

5. A dust extraction system according to claim 1, wherein: An outward expansion cover (330) is detachably connected to the front side of the dust collection cover (300).

6. A dust extraction system according to claim 1, wherein: The air intake amount of the suction port is greater than the air outlet amount of the blowing nozzle (310).

7. A dust extraction system according to claim 1, wherein: A lifting driving element (341) is connected to the rear side of the dust collection cover (300), the lifting driving element (341) is drivingly connected with a lifting seat (342), the lifting seat (342) extends into the dust collection cover (300), the lifting driving element (341) can drive the lifting seat (342) to move up and down, a translation driving element (343) is connected to the lifting seat (342), the translation driving element (343) is drivingly connected with the blowing nozzle (310), and the translation driving element (343) can drive the blowing nozzle (310) to move left and right.

8. A dust extraction system according to claim 1, wherein: The air purifying mechanism comprises a case (210), a blowing fan (220) and a filter cylinder (230), the case (210) is connected to the frame (100), a filter cavity and an air outlet cavity are formed in the case (210) and are separated from each other, the filter cylinder (230) is connected to the filter cavity, the middle part of the filter cylinder (230) is communicated with the air outlet cavity, the exhaust inlet (211) is formed on one side of the filter cavity, the clean air outlet (212) is formed on one side of the air outlet cavity, and the blowing fan (220) is arranged on the pipeline between the blowing nozzle (310) and the clean air outlet (212).

9. A dust extraction system according to claim 8, wherein: An exhaust cavity is formed in the case (210), an exhaust fan (240) is arranged in the exhaust cavity, the air inlet end of the exhaust fan (240) is communicated with the air outlet cavity, and an exhaust port communicated with the air outlet end of the exhaust fan (240) is arranged on the exhaust cavity.

10. A dust extraction system according to claim 1, characterised in that: The bottom side of the frame (100) is provided with a pulley (120).

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