Ground negative pressure dust collection device and ground negative pressure dust collection system

Abstract

The application provides a ground negative pressure dust collecting device and a ground negative pressure dust collecting system. The device comprises a dust collecting part and a handle. The dust collecting part comprises a wind collecting cover and a dust collecting cover. The wind collecting cover is detachably connected with the handle. The wind collecting cover is arranged on the top of the dust collecting cover and is in communication with the dust collecting cover. The dust collecting cover is spaced apart from the surface to be cleaned to form an air inlet. The air inlet is provided with an agitating member which is in contact with the surface to be cleaned. The wind collecting cover and the dust collecting cover are arranged in communication. The dust collecting cover is spaced apart from the surface to be cleaned to form an air inlet. The air inlet provides a flow path for air flow and sundries. The agitating member arranged at the air inlet and in contact with the surface to be cleaned can effectively disturb the coal dust adhered to the surface to be cleaned, strip the adherent coal dust which is difficult to clean, avoid missing corners or stubborn dust, and greatly improve the cleaning effect. The wind collecting cover is detachably connected with the handle, which facilitates the disassembly, carrying and maintenance of the device.

Description

Technical Field

[0001] This application belongs to the technical field of dust removal equipment, specifically relating to a ground negative pressure dust collection device and a ground negative pressure dust collection system. Background Technology

[0002] In coal mine surface production systems, areas such as belt conveyor transfer stations and coal conveyor corridors are prone to generating a large amount of coal dust due to coal transfer operations. Coal dust not only pollutes the working environment and endangers the health of on-site personnel, but may also cause safety hazards due to accumulation, and at the same time waste coal resources. Therefore, it is necessary to use ground ash sweeping negative pressure recovery tools to clean and recover it in a timely manner.

[0003] Existing vacuum cleaners typically lack effective agitation structures to dissipate coal dust adhering to the ground, making it easy to miss corners or highly adhesive dust during cleaning, thus affecting the cleaning effect. Utility Model Content

[0004] Therefore, the technical problem to be solved by this application is to provide a ground negative pressure dust collection device and a ground negative pressure dust collection system, which can enhance the effective disturbance of coal dust adhering to the ground and improve the cleaning effect.

[0005] To address the aforementioned problems, a first aspect of this application provides a ground negative pressure dust collection device, comprising a dust collection section and a handle. The dust collection section includes an air collecting hood and a suction hood. The air collecting hood is detachably connected to the handle. The air collecting hood is disposed on top of the suction hood and communicates with it. There is a gap between the suction hood and the surface to be cleaned to form an air inlet. The air inlet is provided with an agitator, which contacts the surface to be cleaned.

[0006] Optionally, the dust collection unit includes a connecting component and a traveling wheel. The traveling wheel is rotatably mounted on the connecting component, and the connecting component is connected to the dust collection hood. There are two traveling wheels, and the connecting component and the traveling wheel are arranged in a one-to-one correspondence. The connecting component and the traveling wheel are respectively arranged on both sides of the length direction of the dust collection hood.

[0007] Optionally, the connecting assembly includes a support bend, an adjusting screw, and a shock-absorbing spring. The support bend includes a vertical section and a horizontal section. The walking wheel is rotatably connected to the vertical section. The bottom of the adjusting screw passes vertically through the horizontal section and is connected to the dust collection hood. The shock-absorbing spring is sleeved on the adjusting screw and is located between the horizontal section and the dust collection hood.

[0008] Optionally, the dust hood includes a hood body and a clamping plate. The clamping plate is disposed below the top inner wall of the hood body and is parallel to the top inner wall of the hood body. The bottom of the adjusting screw is threaded with an adjusting nut. The adjusting nut is disposed between the top inner wall of the hood body and the clamping plate. The dust hood also includes a clamping screw that passes through the clamping plate and the top of the hood body to clamp the adjusting nut between the clamping plate and the hood body.

[0009] Optionally, the walking wheel is rotatably connected to the vertical section via an axle, the axle passes through the vertical section, and a locking nut is provided on the end of the axle away from the walking wheel.

[0010] Optionally, the air collector cover and the handle are detachably connected by a connecting screw; the air collector cover and the connecting screw are connected by a first connecting bolt, and the handle and the connecting screw are connected by a second connecting bolt.

[0011] Optionally, the angle between the handle and the dust collection unit is adjustable.

[0012] Optionally, the dust hood is provided with a pressure plate, and the top of the agitator is clamped and fixed between the dust hood and the pressure plate. The agitator is made of a flexible material.

[0013] Optionally, the dust hood is provided with a flow guide, and the flow area of ​​the flow guide decreases along the flow direction.

[0014] A second aspect of this application provides a ground negative pressure dust collection system, including a ground negative pressure dust collection device and a negative pressure device as described above, wherein the ground negative pressure dust collection device is connected to the negative pressure device.

[0015] The ground negative pressure dust collection device and system provided in the embodiments of this application, by setting up an air collecting hood and a dust collection hood, and connecting the air collecting hood and the dust collection hood, while the gap between the dust collection hood and the surface to be cleaned forms an air inlet, provides a path for airflow and debris. By setting an agitator at the air inlet that contacts the surface to be cleaned, the coal dust adhering to the surface to be cleaned can be effectively disturbed, peeling off the hard-to-clean adhesive coal dust, avoiding missing corners or stubborn dust, and greatly improving the cleaning effect. The air collecting hood is detachably connected to the handle, which facilitates the disassembly, carrying and maintenance of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the dust collection unit from the main view of an embodiment of this application; Figure 2 This is a top-view structural diagram of the walking wheel in an embodiment of this application; Figure 3This is a first structural schematic diagram of the dust collection unit from a side view according to an embodiment of this application; Figure 4 This is a side view of the second structure of the dust collection unit in an embodiment of this application.

[0017] The reference numerals in the attached figures are as follows: 1. Air hood; 2. Clamping screw; 3. Adjusting screw; 4. Support plate; 5. Shock-absorbing spring; 6. Axle; 7. Wheel; 8. Adjusting shim; 9. Locking nut; 10. Pressure plate; 11. Agitator; 12. Clamping plate; 13. Dust hood; 14. First connecting bolt; 15. Connecting screw; 16. Air guide; 17. Adjusting nut. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0022] See also Figures 1 to 4As shown, according to a first aspect of the present application, a ground negative pressure dust collection device is provided, including a dust collection part and a handle. The dust collection part includes an air collecting hood 1 and a dust suction hood 13. The air collecting hood 1 is detachably connected to the handle. The air collecting hood 1 is disposed on top of the dust suction hood 13 and is connected to the dust suction hood 13. There is a gap between the dust suction hood 13 and the surface to be cleaned to form an air inlet. The air inlet is provided with an agitator 11, which contacts the surface to be cleaned.

[0023] By setting up an air collecting hood 1 and a dust collection hood 13, and connecting the air collecting hood 1 and the dust collection hood 13, while simultaneously creating an air inlet between the dust collection hood 13 and the surface to be cleaned, a path for airflow and debris is provided. By installing an agitator 11 at the air inlet that contacts the surface to be cleaned, the coal dust adhering to the surface can be effectively agitated, peeling off stubborn coal dust that is difficult to clean, avoiding missed corners or stubborn dust, and significantly improving the cleaning effect. The air collecting hood 1 is detachably connected to the handle, facilitating the disassembly, carrying, and maintenance of the device.

[0024] The dust collection section has a hollow structure, allowing dust, dirt, and airflow to pass through it.

[0025] Specifically, both the air collecting hood 1 and the dust collecting hood 13 are roughly hollow box structures with openings at the bottom. The air collecting hood 1 is located on top of the dust collecting hood 13, and the two are connected. Dust, dirt, and airflow can pass through the air collecting hood 1 and the dust collecting hood 13 sequentially from bottom to top.

[0026] Vertically, there is a gap between the bottom of the dust hood 13 and the surface to be cleaned, thus forming an air inlet. Airflow and dust and dirt enter the dust hood 13 through the air inlet.

[0027] The bottom end of the agitator 11 contacts the surface to be cleaned, thereby effectively disturbing the coal dust adhering to the surface and improving the cleaning effect.

[0028] The handle is equipped with airflow channels, which connect to the hollow structure of the dust collection unit and the external negative pressure device. When the external negative pressure device is activated, a negative pressure is created within the airflow channels of the hollow structure and the handle, significantly lowering the internal air pressure of the dust collection hood 13 compared to the external atmospheric pressure. Under this pressure difference, outside air carries coal dust from the ground through the air inlet between the dust collection hood 13 and the surface to be cleaned, thus completing the initial adsorption of the coal dust. Secondly, during the cleaning process, the agitator 11, installed at the inlet of the air inlet and in contact with the surface to be cleaned, works simultaneously to mechanically agitate the highly adhesive coal dust on the ground, peeling off and activating the tightly adhered coal dust particles, preventing any missed areas due to coal dust adhesion. The agitated and activated coal dust is more easily drawn into the air inlet by the airflow created by the negative pressure, and ultimately, along with the airflow, enters the external negative pressure device through the air collector hood 1 for collection, significantly improving the cleaning effect.

[0029] The dust collection unit includes a connecting assembly and wheels 7. The wheels 7 are rotatably mounted on the connecting assembly, which is connected to the dust collection hood 13. There are two wheels 7, and the connecting assembly and the wheels 7 are arranged in a one-to-one correspondence. The connecting assembly and the wheels 7 are respectively provided on both sides of the length direction of the dust collection hood 13.

[0030] By setting up connecting components and traveling wheels 7, the traveling wheels 7 are installed on both sides of the dust hood 13 along its length via the connecting components. On the one hand, the device can move flexibly on the surface to be cleaned via the traveling wheels 7, reducing the labor intensity when manually pushing the device to clean. On the other hand, the traveling wheels 7 on both sides can stably support the dust hood 13, ensuring that the dust hood 13 and the surface to be cleaned always maintain a preset distance, ensuring stable air intake, avoiding a decrease in cleaning effect or damage to the device due to tilting of the dust hood 13, and extending the service life of the device.

[0031] Among them, the two walking wheels 7 are symmetrically arranged.

[0032] Among them, the walking wheel 7 and the corresponding connecting component form a wheel set, and a wheel set is provided on each side of the dust collection cover 13 along its length.

[0033] The connecting components include a support bend 4, an adjusting screw 3, and a shock-absorbing spring 5. The support bend 4 includes a vertical section and a horizontal section. The walking wheel 7 is rotatably connected to the vertical section. The bottom of the adjusting screw 3 passes vertically through the horizontal section and is connected to the dust cover 13. The shock-absorbing spring 5 is sleeved on the adjusting screw 3 and is located between the horizontal section and the dust cover 13.

[0034] By incorporating a supporting bend plate 4, adjusting screws 3, and shock-absorbing springs 5 ​​into the connecting assembly, the vertical section of the supporting bend plate 4 provides a stable mounting base for the traveling wheels 7. The horizontal section, in conjunction with the adjusting screws 3, allows adjustment of the relative height between the traveling wheels 7 and the dust collection hood 13, thereby adjusting the distance between the dust collection hood 13 and the surface to be cleaned, adapting to the cleaning needs of coal dust of varying thicknesses. Simultaneously, the shock-absorbing springs 5, fitted onto the adjusting screws 3 and located between the horizontal section and the dust collection hood 13, absorb vibrations caused by ground bumps during device movement, reducing the impact of vibrations on components such as the dust collection hood 13 and the air collection hood 1, enhancing the structural stability of the device, preventing component damage due to vibration, and extending its service life.

[0035] Among them, the supporting curved plate 4 is L-shaped, with the vertical section set vertically and the horizontal section set horizontally.

[0036] Among them, the adjusting screw 3 is set vertically, and after penetrating the horizontal section, it is inserted into and fixed to the dust cover 13.

[0037] The shock-absorbing spring 5 is sleeved on the outer periphery of the adjusting screw 3, with the top end of the shock-absorbing spring 5 abutting against the bottom of the transverse section and the bottom end of the shock-absorbing spring 5 abutting against the top of the dust cover 13.

[0038] Among them, the walking wheel 7 is located on the side of the vertical section away from the dust cover 13.

[0039] The dust hood 13 includes a hood body and a clamping plate 12. The clamping plate 12 is located below the top inner wall of the hood body and is parallel to the top inner wall of the hood body. The bottom of the adjusting screw 3 is threaded with an adjusting nut 17. The adjusting nut 17 is located between the top inner wall of the hood body and the clamping plate 12. The dust hood 13 also includes a clamping screw 2, which passes through the clamping plate 12 and the top of the hood body to clamp the adjusting nut 17 between the clamping plate 12 and the hood body.

[0040] By setting an adjusting nut 17 between the inner wall of the top of the cover and the clamping plate 12, and by fastening the clamping plate 12 to the cover with the clamping screw 2, the adjusting nut 17 is fixed, thereby stably connecting the adjusting screw 3. This not only reduces the probability of the adjusting screw 3 loosening during the use of the device and ensures the stability of the walking wheel 7 after height adjustment, but also facilitates the subsequent disassembly of the clamping screw 2 and the position of the clamping plate 12, and maintenance and replacement of the adjusting nut 17 or the adjusting screw 3, reducing maintenance difficulty and cost.

[0041] The clamping plate 12 is horizontally positioned, the top of the cover is horizontally positioned, and the clamping plate 12 is positioned below the inner top wall of the cover.

[0042] Specifically, by adjusting the screw 3 and adjusting the nut 17, the cover and the clamping plate 12 are clamped vertically, thereby fixing the cover and the clamping plate 12.

[0043] The clamping screw 2 is vertically arranged and passes through the top of the clamping plate 12 and the cover in a vertical direction. The bottom of the clamping screw 2 is provided with a clamping nut. The clamping screw 2 cooperates with the clamping nut to apply a vertical clamping force to the clamping plate 12 and the cover, thereby clamping the clamping plate 12 and the cover to the adjusting nut 17, thus fixing the adjusting nut 17.

[0044] The traveling wheel 7 is rotatably connected to the vertical section via the wheel axle 6, which passes through the vertical section. A locking nut 9 is provided on the end of the wheel axle 6 away from the traveling wheel 7.

[0045] The axle 6 passes through the vertical section of the support bend plate 4 and connects to the traveling wheel 7. A locking nut 9 is installed at the end of the axle 6 away from the traveling wheel 7, which can stably fix the axle 6 on the support bend plate 4, preventing the axle 6 from shifting or falling off during the rotation of the traveling wheel 7, ensuring the stability of the rotation of the traveling wheel 7, ensuring that the device can move smoothly, avoiding the impact of the cleaning operation efficiency due to the loosening of the axle 6, and also facilitating the removal of the locking nut 9 for maintenance and replacement of the axle 6 and the traveling wheel 7.

[0046] The wheel axle 6 is horizontally positioned, and the traveling wheel 7 is rotatably positioned on the end of the wheel axle 6 located on the outer side of the vertical section. The locking nut 9 is threadedly connected to the end of the wheel axle 6 away from the traveling wheel 7.

[0047] The traveling wheel 7, wheel axle 6, and locking nut 9 are coaxially arranged.

[0048] Among them, an adjusting shim 8 is fitted on the axle 6, and the adjusting shim 8 is located between the vertical section and the traveling wheel 7.

[0049] The air shroud 1 is detachably connected to the handle via a connecting screw 15.

[0050] By detachably connecting the air collector cover 1 and the handle via the connecting screw 15, it is convenient to disassemble and replace the damaged parts separately when the air collector cover 1 or the handle is damaged, without the need to replace the whole device, thus reducing maintenance costs.

[0051] Specifically, the air shroud 1 is connected to the connecting screw 15 by the first connecting bolt 14, and the handle is connected to the connecting screw 15 by the second connecting bolt.

[0052] More specifically, the first connecting bolt 14 passes through the air collector cover 1 and the connecting screw 15 respectively, thereby connecting the air collector cover 1 and the connecting screw 15. The second connecting bolt passes through the handle and the connecting screw 15 respectively, thereby connecting the handle and the connecting screw 15.

[0053] The angle between the handle and the dust collection unit is adjustable.

[0054] The handle is designed to be angled with the dust collection unit, allowing operators to adjust the handle angle flexibly according to the tilt angle of the surface to be cleaned and their own operating posture. This makes operation less strenuous and reduces fatigue from prolonged use. Furthermore, adjusting the angle allows the dust hood 13 to better conform to the surface being cleaned, ensuring stable airflow and further improving cleaning performance, making it suitable for diverse cleaning environments.

[0055] The first connecting bolt 14 is set horizontally. Tightening the first connecting bolt 14 unlocks the air collector cover 1 from the connecting screw 15, thereby adjusting the angle between the air collector cover 1 and the connecting screw 15. After the adjustment is completed, tightening the first connecting bolt 14 locks the air collector cover 1 and the connecting screw 15, thus completing the adjustment.

[0056] The second connecting bolt is set horizontally. Tightening the second connecting bolt unlocks the handle from the connecting screw 15, thereby adjusting the angle between the handle and the connecting screw 15. After adjustment, tightening the second connecting bolt locks the handle from the connecting screw 15, completing the adjustment.

[0057] A pressure plate 10 is provided on the dust cover 13, and the top of the agitator 11 is clamped and fixed between the dust cover 13 and the pressure plate 10. The agitator 11 is made of flexible material.

[0058] The agitator 11 is clamped and fixed to the dust collection hood 13 by the pressure plate 10, ensuring that the agitator 11 does not loosen or shift during use, thus guaranteeing the agitation effect on the coal dust on the ground. At the same time, the agitator 11 is made of flexible material, which can effectively peel off the coal dust adhering to the ground, while avoiding scratches and damage to the ground caused by the hard material agitator 11, protecting the surface to be cleaned. Moreover, when the flexible material agitator 11 wears out, the pressure plate 10 can be easily removed to replace the agitator 11 with a new one, reducing the difficulty of replacing vulnerable parts and maintenance costs.

[0059] The agitator 11 can be a flat, elongated structure, with its length direction aligned with the length direction of the air inlet to cover the air inlet.

[0060] The top end of the agitator 11 is clamped and fixed between the dust hood 13 and the pressure plate 10, and the bottom end of the agitator 11 is in contact with the ground.

[0061] Specifically, the pressure plate 10 can be disposed on the inner side of the inner wall of the dust collection hood 13, and the top end of the agitator 11 can be disposed between the dust collection hood 13 and the pressure plate 10. Alternatively, the pressure plate 10 can be disposed on the outer side of the outer wall of the dust collection hood 13, and the top end of the agitator 11 can be disposed between the dust collection hood 13 and the pressure plate 10.

[0062] The dust hood 13 is provided with a flow guide 16, and the flow area of ​​the flow guide 16 decreases along the flow direction.

[0063] A guide element 16 with a flow area decreasing along the flow direction is provided inside the dust collection hood 13. This guides the airflow to flow along a preset path inside the dust collection hood 13. The decreasing flow area accelerates the airflow velocity, enhances the airflow suction, and improves the adsorption capacity for coal dust. At the same time, it reduces the generation of eddies in the airflow inside the dust collection hood 13, reduces the weakening effect of eddies on the airflow suction, improves dust collection efficiency, and ensures that more coal dust can be carried into the negative pressure device by the airflow, reducing dust residue and secondary dust.

[0064] The guide 16 can be roughly trumpet-shaped, with the flared end at the bottom and the constricted end at the top, allowing airflow and dust to pass through the guide 16 from bottom to top.

[0065] The dust hood 13 and the air guide 16 are coaxially arranged, with the axis extending vertically.

[0066] A second aspect of this application provides a ground negative pressure dust collection system, including a ground negative pressure dust collection device and a negative pressure device as described above, wherein the ground negative pressure dust collection device is connected to the negative pressure device.

[0067] By connecting the ground negative pressure dust collection device to the negative pressure device, a stable negative pressure is provided to the dust collection device, ensuring continuous and sufficient suction within the dust collection hood 13 and the air collecting hood 1. This allows for efficient collection of ground coal dust, thorough removal of dust, and prevention of secondary dust generation. The systematic design establishes a complete process for coal dust collection, transportation, and treatment, improving coal dust recovery efficiency, reducing coal resource waste, improving the working environment, protecting personnel health, and reducing safety hazards.

[0068] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0069] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely implementation methods of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A ground negative pressure dust collection device, characterized in that, The device includes a dust collection unit and a handle. The dust collection unit includes an air collecting hood (1) and a suction hood (13). The air collecting hood (1) is detachably connected to the handle. The air collecting hood (1) is located on top of the suction hood (13) and is connected to the suction hood (13). There is a gap between the suction hood (13) and the surface to be cleaned to form an air inlet. The air inlet is provided with an agitator (11), which is in contact with the surface to be cleaned.

2. The ground negative pressure dust collection device according to claim 1, characterized in that, The dust collection unit includes a connecting assembly and a traveling wheel (7). The traveling wheel (7) is rotatably mounted on the connecting assembly, and the connecting assembly is connected to the dust collection hood (13). There are two wheels (7), and the connecting components are arranged one-to-one with the wheels (7). The connecting components and the wheels (7) are respectively arranged on both sides of the length direction of the dust collection cover (13).

3. The ground negative pressure dust collection device according to claim 2, characterized in that, The connecting assembly includes a support bend plate (4), an adjusting screw (3), and a shock-absorbing spring (5). The support bend plate (4) includes a vertical section and a horizontal section. The walking wheel (7) is rotatably connected to the vertical section. The bottom of the adjusting screw (3) passes vertically through the horizontal section and is connected to the dust collection hood (13). The shock-absorbing spring (5) is sleeved on the adjusting screw (3) and is located between the horizontal section and the dust collection hood (13).

4. The ground negative pressure dust collection device according to claim 3, characterized in that, The dust hood (13) includes a hood body and a clamping plate (12). The clamping plate (12) is located below the top inner wall of the hood body and is parallel to the top inner wall of the hood body. The bottom of the adjusting screw (3) is threaded with an adjusting nut (17). The adjusting nut (17) is located between the top inner wall of the hood body and the clamping plate (12). The dust hood (13) also includes a clamping screw (2). The clamping screw (2) passes through the clamping plate (12) and the top of the hood body to clamp the adjusting nut (17) between the clamping plate (12) and the hood body.

5. The ground negative pressure dust collection device according to claim 3, characterized in that, The walking wheel (7) is rotatably connected to the vertical section via an axle (6), the axle (6) passes through the vertical section, and a locking nut (9) is provided on the end of the axle (6) away from the walking wheel (7).

6. The ground negative pressure dust collection device according to claim 1, characterized in that, The air shroud (1) and the handle are detachably connected by a connecting screw (15); The air shroud (1) is connected to the connecting screw (15) by a first connecting bolt (14), and the handle is connected to the connecting screw (15) by a second connecting bolt.

7. The ground negative pressure dust collection device according to claim 6, characterized in that, The angle between the handle and the dust collection unit is adjustable.

8. The ground negative pressure dust collection device according to claim 1, characterized in that, The dust collection hood (13) is provided with a pressure plate (10), and the top of the agitator (11) is clamped and fixed between the dust collection hood (13) and the pressure plate (10). The agitator (11) is made of a flexible material.

9. The ground negative pressure dust collection device according to claim 1, characterized in that, The dust hood (13) is provided with a flow guide (16), and the flow area of ​​the flow guide (16) decreases along the flow direction.

10. A ground negative pressure dust collection system, characterized in that, It includes a ground negative pressure dust collection device and a negative pressure device as described in any one of claims 1 to 9, wherein the ground negative pressure dust collection device is connected to the negative pressure device.

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