Dust removal device

Abstract

The utility model belongs to the technical field of dust removal, and discloses a dust removal device. The dust removal device comprises a main pipeline, a dust blowing assembly, a dust suction assembly and a switching assembly, the main pipeline comprises a gun head and an air source connector, and the air source connector is used for being connected with a positive pressure air source; the two ends of the dust blowing assembly communicate with the gun head and the air source connector correspondingly. The dust collection assembly comprises a vacuum generator, the vacuum generator comprises an air inlet, an exhaust port and a negative pressure port which are communicated, the air inlet is communicated with the air source connector, and the negative pressure port is communicated with the gun head; the switching assembly is configured to enable the dust blowing assembly to be conducted or enable the dust collection assembly to be conducted. According to the dust removal device, a dust blowing mode and a dust suction mode are conveniently switched, the equipment cleaning and maintaining process in tobacco shred production and transportation is simplified, the working efficiency is improved, and the cleaning requirements of different equipment are met.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology, and in particular to a dust removal device. Background Technology

[0002] The production and transportation of tobacco shreds generate a large amount of soot, making the maintenance of various equipment particularly important. For equipment parts prone to dust accumulation, frequent blowing and cleaning are necessary to prevent insect infestation and equipment damage. However, blowing is not suitable for precision electrical equipment in electrical cabinets, as well as for optical instruments and dust collectors; vacuuming is required instead. Traditional maintenance methods require separate blowing and vacuuming with an air gun and a vacuum cleaner, respectively, which is cumbersome and inefficient.

[0003] Therefore, there is an urgent need to provide a dust removal device to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a dust removal device that enables convenient switching between blowing and suction modes, simplifies the equipment cleaning and maintenance process in tobacco production and transportation, improves work efficiency, and meets the cleaning needs of different equipment.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A dust removal device, comprising:

[0007] The main pipeline includes a nozzle and an air source connector, which is used to connect a positive pressure air source.

[0008] A dust blowing assembly, the two ends of which are respectively connected to the nozzle and the air source connector;

[0009] A vacuuming assembly includes a vacuum generator, which includes an air inlet, an exhaust outlet, and a negative pressure port connected in communication. The air inlet is connected to the air source connector, and the negative pressure port is connected to the nozzle.

[0010] A switching component configured to activate either the blowing component or the suction component.

[0011] As an alternative to the dust removal device, the dust collection assembly also includes a dust collection bag, which is detachably connected to the vacuum generator and communicates with the exhaust port.

[0012] As an alternative to the dust removal device, the dust collection bag is provided with an exhaust port, the diameter of which is smaller than the particle size of the dust.

[0013] As an alternative to the dust removal device, the dust collection assembly also includes a connecting ring and a locking ring. One of the connecting ring and the locking ring is connected to the pipe wall of the exhaust port of the vacuum generator, and the other of the connecting ring and the locking ring is connected to the dust collection bag. The connecting ring and the locking ring are interlocked.

[0014] As an alternative to the dust removal device, the dust collection assembly also includes a fastener. The locking ring has an axially extending adjustment slot that extends to both end faces. The outer wall of the locking ring has two radially extending portions at the adjustment slot. The fastener passes through the two extending portions to lock the connecting ring to the locking ring.

[0015] As an alternative to the dust removal device, one of the outer wall of the connecting ring or the inner wall of the locking ring is provided with a protrusion, and the other of the outer wall of the connecting ring or the inner wall of the locking ring is provided with a snap-fit ​​groove for accommodating the protrusion.

[0016] As an alternative to the dust removal device, the dust collection assembly also includes a connecting ring and a locking ring. One of the connecting ring and the locking ring is connected to the pipe wall of the exhaust port of the vacuum generator, and the other of the connecting ring and the locking ring is connected to the dust collection bag. The connecting ring has an external thread, and the locking ring has an internal thread. The connecting ring and the locking ring are threaded together.

[0017] As an optional solution for the dust removal device, the main duct also includes two T-connectors, one of which is connected to the air source connector, one end of the dust blowing assembly, and one end of the dust suction assembly, respectively, and the other T-connector is connected to the nozzle, the other end of the dust blowing assembly, and the other end of the dust suction assembly, respectively.

[0018] As an alternative to a dust removal device, the dust collection assembly includes:

[0019] A conversion pipe, one end of which is connected to the tee connector of the gas source connector, and the other end of which is connected to the air inlet of the vacuum generator;

[0020] The vacuum pipe has one end connected to the negative pressure port of the vacuum generator and the other end connected to the tee connector of the nozzle.

[0021] As an optional solution for a dust removal device, the switching component includes a first switch, a second switch, and a third switch. The first switch is used to turn on or off the dust blowing component, the second switch is located in the switching duct, and the third switch is located in the suction duct. The second switch and the third switch synchronously turn on or off the corresponding switching duct and suction duct.

[0022] Beneficial effects:

[0023] This utility model provides a dust removal device. The main pipeline is equipped with a nozzle and an air source connector. The air source connector is connected to a positive pressure air source. The dust blowing assembly is connected to the nozzle and the air source connector at both ends. The positive pressure air source generates a positive pressure airflow, which is ejected from the nozzle to achieve the dust blowing function. The vacuum generator inlet of the dust suction assembly is connected to the air source connector, and the negative pressure port is connected to the nozzle. The positive pressure airflow drives the generation of negative pressure to achieve the dust suction function. A switching assembly can connect the dust blowing assembly or the dust suction assembly. This dust removal device integrates dust blowing and dust suction functions, avoiding the drawbacks of cumbersome operation and low efficiency of traditional methods. It simplifies the cleaning and maintenance process of equipment in tobacco production and transportation, meets the cleaning needs of different equipment, and effectively improves work efficiency. Attached Figure Description

[0024] Figure 1 This is a first schematic diagram of the dust removal device provided in this embodiment of the utility model;

[0025] Figure 2 This is a second schematic diagram of the dust removal device provided in this embodiment of the utility model;

[0026] Figure 3 This is a partial structural schematic diagram of the dust removal device provided in an embodiment of this utility model.

[0027] In the picture:

[0028] 11. Nozzle; 12. Gas source connector; 13. T-connector;

[0029] 21. Dust blowing duct;

[0030] 3. Vacuuming assembly; 31. Vacuum generator; 32. Dust bag; 33. Conversion pipe; 34. Vacuuming pipe; 35. Connecting ring; 36. Locking ring; 37. Fastener; 351. Protrusion; 361. Adjustment gap; 362. Extension; 363. Snap-fit ​​groove;

[0031] 4. Switching components; 41. First switch; 42. Second switch; 43. Third switch. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of the device. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper" and "lower," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] This embodiment provides a dust removal device, such as Figures 1-3As shown, the dust removal device includes a main pipe, a dust blowing assembly, a dust suction assembly 3, and a switching assembly 4. The main pipe includes a nozzle 11 and an air source connector 12, with the air source connector 12 used to connect to a positive pressure air source. The dust blowing assembly is connected to the nozzle 11 and the air source connector 12 at both ends, respectively. The dust suction assembly 3 includes a vacuum generator 31, which includes an air inlet, an exhaust outlet, and a negative pressure outlet connected together. The air inlet is connected to the air source connector 12, and the negative pressure outlet is connected to the nozzle 11. The switching assembly 4 is configured to either activate the dust blowing assembly or activate the dust suction assembly 3. Specifically, the positive pressure airflow generated by the positive pressure air source is ejected from the nozzle 11 through the dust blowing assembly, achieving the dust blowing function. Simultaneously, the positive pressure airflow can also enter the air inlet of the vacuum generator 31 of the dust suction assembly 3, driving it to generate a negative pressure airflow, which achieves the dust suction function through the negative pressure outlet connected to the nozzle 11. With the help of the switching assembly 4, the dust blowing or dust suction modes can be flexibly switched. The two modes can be used interchangeably but cannot be used simultaneously. This dust removal device integrates dust blowing and dust suction functions, avoiding the drawbacks of traditional methods such as cumbersome operation and low efficiency. It simplifies the cleaning and maintenance process of equipment (such as tobacco conveyors, shredders, drying machines, electrical precision equipment in electrical cabinets, and impurity removers and optical instruments) in tobacco production and transportation, meets the cleaning needs of different equipment, and effectively improves work efficiency.

[0037] It is worth noting that the vacuum generator 31 is a new type of efficient, clean, economical, and small vacuum component that uses a positive pressure gas source to generate negative pressure. Its specific structure will not be described in detail here.

[0038] like Figure 1 and Figure 2 As shown, the dust collection assembly 3 also includes a dust collection bag 32, which is detachably connected to the vacuum generator 31 and communicates with the exhaust port. In dust collection mode, negative pressure airflow carries dust into the bag through the negative pressure port and discharges it into the dust collection bag 32 through the exhaust port. The detachable design facilitates cleaning, reduces maintenance difficulty and cost, prevents dust accumulation in the dust collection bag 32, and extends the lifespan of the vacuum generator 31. Simultaneously, the efficient dust collection capability ensures cleanliness around the equipment, reduces damage caused by dust accumulation, further improves the reliability and stability of the equipment during tobacco production and transportation, and ensures the smooth operation of the entire production process.

[0039] Furthermore, the dust collection bag 32 is provided with an exhaust port (not shown in the figure), the diameter of which is smaller than the particle size of the dust. The exhaust port facilitates the discharge of gas from the dust collection bag 32, ensuring smooth airflow during dust collection. This allows dust to be trapped inside the bag while gas is discharged through the exhaust port, achieving air-dust separation and maintaining the normal operation of the dust collection system. The gas discharged through the exhaust port mainly refers to the air generated by the positive pressure air source, driving the vacuum generator 31 to work and thus creating negative pressure suction.

[0040] In this embodiment, as Figure 3 As shown, the dust collection assembly 3 also includes a connecting ring 35 and a locking ring 36. The connecting ring 35 is connected to the wall of the exhaust port of the vacuum generator 31, and the locking ring 36 is connected to the dust collection bag 32. The connecting ring 35 and the locking ring 36 are interlocked. This interlocking engagement makes it easier to disassemble and install the dust collection bag 32, improves equipment maintenance efficiency, ensures the sealing of the connection to improve the dust collection effect, and enhances the stability of the connection to ensure the reliability of equipment operation. In other embodiments, the connecting ring 35 is connected to the dust collection bag 32, and the locking ring 36 is connected to the wall of the exhaust port of the vacuum generator 31. The connecting ring 35 and the locking ring 36 are interlocked.

[0041] Furthermore, such as Figure 3 As shown, the vacuum assembly 3 also includes a fastener 37. The locking ring 36 has an adjusting slot 361 extending through to both end faces along the axial direction. The outer wall of the locking ring 36 has two radially extended portions 362 at the adjusting slot 361. The fastener 37 passes through the two extended portions 362 to lock the connecting ring 35 to the locking ring 36. Specifically, the connecting ring 35 extends out of the exhaust port of the vacuum generator 36. The locking ring 36 covers the opening of the dust collection bag 32, clamping the opening of the dust collection bag 32 between the locking ring 36 and the connecting ring 35. When the connecting ring 35 is inserted into the opening of the locking ring 36 and the dust collection bag 32, by tightening the fastener 37, the two extended portions 362 will move closer to each other, the width of the adjusting slot 361 will decrease, causing the inner diameter of the locking ring 36 to shrink, and the locking ring 36 will tightly clamp the connecting ring 35. This strengthens the connection between the connecting ring 35 and the locking ring 36, effectively preventing them from loosening or even separating during operation of the dust collection device due to vibration, airflow impact, or other factors. This ensures that the dust bag 32 and the vacuum generator 31 remain firmly connected, thereby guaranteeing the stable operation of the entire dust collection assembly 3. Simultaneously, it also ensures the sealing of the connection between the dust bag 32 and the vacuum generator 31, preventing dust leakage due to poor sealing.

[0042] In other embodiments, a connecting ring 35 is connected to the opening of the dust collection bag 32. In this case, the pipe wall of the exhaust port of the vacuum generator 31 needs to extend a certain distance. The pipe wall of the exhaust port and the connecting ring 35 are inserted and aligned from both ends of the locking ring 36. By tightening the fastener 37, the two extensions 362 will move closer to each other, the width of the adjusting slit 361 will decrease, and the inner diameter of the locking ring 36 will shrink. The locking ring 36 will tightly clamp the connecting ring 35 and the pipe wall of the exhaust port.

[0043] Furthermore, such as Figure 3As shown, the outer wall of the connecting ring 35 has a protrusion 351, and the inner wall of the locking ring 36 has a snap-fit ​​groove 363 for accommodating the protrusion 351. During the insertion of the connecting ring 35 into the locking ring 36, the protrusion 351 and the snap-fit ​​groove 363 work together for precise positioning. Operators only need to align the protrusion 351 with the snap-fit ​​groove 363 to quickly and accurately complete the connection, improving installation efficiency and accuracy. During operation, external forces such as vibration and airflow impact can easily loosen the connection, but the protrusion 351 embedded in the snap-fit ​​groove 363 effectively resists external forces, preventing the connecting ring 35 from coming out and enhancing connection stability. When the protrusion 351 is fully placed in the snap-fit ​​groove 363, the two fit tightly together, filling the connection gap and reducing airflow leakage. During dust collection, the excellent sealing performance ensures a stable negative pressure environment, allowing dust to be effectively drawn into the dust collection bag 32, improving dust collection efficiency and effectiveness. Specifically, the outer wall of the connecting ring 35 near the locking ring 36 has a protrusion 351, and the locking ring 36 has a locking groove 363 in the middle to accommodate the protrusion 351. In terms of installation, the protrusion 351 near the end facilitates initial positioning, and the locking groove 363 in the middle makes insertion easier, reducing installation difficulty and saving time. For stability, the protrusion 351 at the edge disperses stress, and the locking groove 363 in the middle ensures even force distribution, preventing loosening of the connection. In another optional embodiment, the outer wall of the connecting ring 35 has a locking groove 363, and the inner wall of the locking ring 36 has a protrusion 351, with the locking groove 363 accommodating the protrusion 351. This design also achieves a stable connection, good sealing, and convenient assembly and disassembly.

[0044] In other embodiments, the connecting ring 35 is connected to the wall of the exhaust port of the vacuum generator 31, and the locking ring 36 is connected to the dust collection bag 32. The connecting ring 35 has an external thread, and the locking ring 36 has an internal thread. The connecting ring 35 and the locking ring 36 are threaded together. This connection method, due to the self-locking characteristic of the threads, can resist external forces such as vibration and airflow impact during the operation of the dust removal device, maintaining a firm and stable connection, ensuring that the dust collection bag 32 is tightly connected to the vacuum generator 31 and the system operates normally. Operators can easily complete the installation and disassembly by rotating the ring, which is simple and quick, reducing the need for professional skills and saving costs. The tight fit between the threads forms multiple sealing surfaces, effectively preventing airflow leakage, maintaining a negative pressure environment in the system, improving dust collection efficiency, and reducing dust leakage. In another optional embodiment, the connecting ring 35 is connected to the dust collection bag 32, and the locking ring 36 is connected to the wall of the exhaust port of the vacuum generator 31. The connecting ring 35 has an external thread, and the locking ring 36 has an internal thread. The connecting ring 35 and the locking ring 36 are threaded together.

[0045] like Figure 1 and Figure 2As shown, the dust removal device also includes two T-connectors 13. One T-connector 13 is connected to the air source connector 12, one end of the dust blowing assembly, and one end of the dust suction assembly 3, respectively. The other T-connector 13 is connected to the nozzle 11, the other end of the dust blowing assembly, and the other end of the dust suction assembly 3, respectively. The T-connector 134 acts as an airflow distribution hub. Since only one of the dust suction assembly 3 and the dust blowing assembly works at a time, the positive pressure air source is connected to both via the T-connector 13, which can deliver positive pressure airflow to the corresponding components (here referring to the dust suction assembly 3 and the dust blowing assembly) in a timely manner when the dust blowing or dust suction mode is activated.

[0046] like Figure 1 and Figure 2 As shown, the vacuuming assembly 3 includes a conversion pipe 33 and a suction pipe 34. One end of the conversion pipe 33 is connected to a T-connector 13 connecting to the air source connector 12, and the other end is connected to the air inlet of the vacuum generator 31. One end of the suction pipe 34 is connected to the negative pressure port of the vacuum generator 31, and the other end is connected to a T-connector 13 connecting to the nozzle 11. The configuration of the conversion pipe 33 and the suction pipe 34 ensures the effective realization of the vacuuming function. Positive pressure airflow smoothly enters the vacuum generator 31 through the conversion pipe 33, driving it to generate negative pressure, which is then transmitted to the nozzle 11 through the suction pipe 34, enabling the nozzle 11 to adsorb dust and complete the vacuuming operation.

[0047] like Figure 1 and Figure 2 As shown, the dust blowing assembly includes a dust blowing pipe 21. One end of the dust blowing pipe 21 is connected to a three-way connector 13 that connects to the air source connector 12, and the other end of the dust blowing pipe 21 is connected to a three-way connector 13 that connects to the nozzle 11. Positive pressure airflow passes directly through the dust blowing pipe 21 and is blown out from the nozzle 11 for dust blowing.

[0048] like Figure 1 and Figure 2As shown, the switching component 4 includes a first switch 41, a second switch 42, and a third switch 43. The first switch 41 is used to turn on or off the dust blowing component. The second switch 42 is located in the switching pipe 33, and the third switch 43 is located in the suction pipe 34. The second switch 42 and the third switch 43 simultaneously turn on or off the corresponding switching pipe 33 and suction pipe 34. Specifically, in dust blowing mode, the second switch 42 and the third switch 43 are closed simultaneously, and the first switch 41 is opened, allowing the dust blowing pipe 21 to be open for dust blowing operations. In suction mode, the first switch 41 is closed, and the second switch 42 and the third switch 43 are opened simultaneously, allowing the switching pipe 33 and suction pipe 34 to be opened simultaneously. Positive pressure airflow enters the vacuum generator 31 through the switching pipe 33, is converted into negative pressure airflow, and then flows out of the suction pipe 34 to adsorb dust. In dust blowing mode, the second switch 42 and the third switch 43 must be closed simultaneously. This is because if the switch is not turned off, the positive pressure airflow will be diverted to the conversion pipe 33 and enter the vacuum generator 31, weakening the airflow intensity of the dust blowing pipe 21 and affecting the dust blowing effect. It will also cause the suction pipe 34 to interfere with the dust blowing airflow, resulting in incomplete dust removal. At the same time, turning on the switch will waste energy, causing the positive pressure airflow to continue driving the vacuum generator 31 when dust collection is not required, increasing energy consumption. Furthermore, the positive pressure airflow entering the vacuum generator 31 may cause it to operate under non-design conditions, causing equipment damage, creating additional pressure shocks on the entire dust removal device, increasing the risk of failure, and threatening the safe operation of the equipment.

[0049] The dust collection port of the nozzle 11 is round or flat, making the dust collection device more targeted and adaptable in cleaning operations. For example... Figure 1 As shown, the dust removal port of the nozzle 11 is round, which is suitable for cleaning small, spot-like dust areas, enabling precise blowing and suction. In other embodiments, the dust removal port of the nozzle 11 is flat, which is better suited for handling large areas and long strips of dust, allowing for efficient cleaning. The availability of two nozzle shapes 11 allows operators to switch flexibly according to actual conditions, improving cleaning quality and efficiency while reducing cleaning costs and enhancing the overall practicality and functionality of the dust removal device. Furthermore, the dust removal port of the nozzle 11 can be designed in other special shapes to expand the device's cleaning capabilities and application scenarios, such as triangular, trapezoidal, and elliptical shapes.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A dust removal device, characterized in that, include: The main pipeline includes a nozzle (11) and a gas source connector (12), the gas source connector (12) being used to connect to a positive pressure gas source; A dust blowing assembly, the two ends of which are respectively connected to the gun head (11) and the air source connector (12); The vacuum assembly (3) includes a vacuum generator (31), which includes an air inlet, an exhaust outlet and a negative pressure port connected together. The air inlet is connected to the air source connector (12) and the negative pressure port is connected to the nozzle (11). A switching component (4) is configured to turn on the blowing component or the suction component (3).

2. The dust removal device according to claim 1, characterized in that, The dust collection assembly (3) also includes a dust collection bag (32), which is detachably connected to the vacuum generator (31) and is connected to the exhaust port.

3. The dust removal device according to claim 2, characterized in that, The dust collection bag (32) has an exhaust hole, the diameter of which is smaller than the particle size of the dust.

4. The dust removal device according to claim 2, characterized in that, The dust collection assembly (3) further includes a connecting ring (35) and a locking ring (36). One of the connecting ring (35) and the locking ring (36) is connected to the pipe wall of the exhaust port of the vacuum generator (31), and the other of the connecting ring (35) and the locking ring (36) is connected to the dust collection bag (32). The connecting ring (35) and the locking ring (36) are inserted into each other.

5. The dust removal device according to claim 4, characterized in that, The dust collection assembly (3) also includes a fastener (37). The locking ring (36) has an axially extending adjustment slot (361) that extends to both end faces. The outer wall of the locking ring (36) has two radially extending portions (362) at the adjustment slot (361). The fastener (37) passes through the two extending portions (362) to lock the connecting ring (35) to the locking ring (36).

6. The dust removal device according to claim 5, characterized in that, One of the outer wall of the connecting ring (35) or the inner wall of the locking ring (36) is provided with a protrusion (351), and the other of the outer wall of the connecting ring (35) or the inner wall of the locking ring (36) is provided with a snap-fit ​​groove (363) for accommodating the protrusion (351).

7. The dust removal device according to claim 2, characterized in that, The dust collection assembly (3) further includes a connecting ring (35) and a locking ring (36). One of the connecting ring (35) and the locking ring (36) is connected to the pipe wall of the exhaust port of the vacuum generator (31), and the other of the connecting ring (35) and the locking ring (36) is connected to the dust collection bag (32). The connecting ring (35) is provided with an external thread, and the locking ring (36) is provided with an internal thread. The connecting ring (35) and the locking ring (36) are threadedly engaged.

8. The dust removal device according to claim 1, characterized in that, The main pipeline also includes two T-joints (13), one of which is connected to the air source connector (12), one end of the dust blowing assembly and one end of the dust suction assembly (3), and the other T-joint (13) is connected to the gun head (11), the other end of the dust blowing assembly and the other end of the dust suction assembly (3).

9. The dust removal device according to claim 8, characterized in that, The vacuuming assembly (3) includes: A conversion pipe (33) is provided, one end of which is connected to the tee connector (13) that connects to the gas source connector (12), and the other end of which is connected to the air inlet of the vacuum generator (31). A vacuum pipe (34) is provided, one end of which is connected to the negative pressure port of the vacuum generator (31), and the other end of which is connected to the tee connector (13) that connects to the gun head (11).

10. The dust removal device according to claim 9, characterized in that, The switching component (4) includes a first switch (41), a second switch (42), and a third switch (43). The first switch (41) is used to turn on or off the dust blowing component. The second switch (42) is located in the switching pipe (33). The third switch (43) is located in the suction pipe (34). The second switch (42) and the third switch (43) synchronously turn on or off the corresponding switching pipe (33) and suction pipe (34).

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