Explosion-proof grinding wheel device and using method thereof

Abstract

The invention relates to the technical field of grinding machines, in particular to an anti-explosion grinding wheel device and a using method thereof.The anti-explosion grinding wheel device comprises a machine base, a controller, a protective box body, an anti-explosion protective cover, a driving motor, a grinding wheel body and a dust collecting mechanism, an exhaust fan is started, and stable negative pressure suction airflow is established in an exhaust main pipe, a first branch pipe and a second branch pipe; the inner space of the anti-explosion protective cover is continuously sucked through a first branch pipe, dust generated and diffused in the anti-explosion protective cover during grinding operation is discharged in time, dust escaping from an operation window to the external environment is effectively captured and sucked through a collecting cover at the front end of a second branch pipe, a spraying dust suppression assembly on a vertical collecting barrel is started, and the dust suppression effect is achieved. And water mist is sprayed downwards, so that dust particles in ascending air flow are fully wetted, the weight of the dust particles is increased, and then the dust particles are settled to the bottom of the barrel, dust is safely collected when workpieces are machined, and meanwhile, the functions of explosion-proof safety and occupational health are considered.

Description

Technical Field

[0001] This invention relates to the field of grinding wheel technology, and in particular to an explosion-proof grinding wheel device and its usage method. Background Technology

[0002] Explosion-proof grinding wheels are key pieces of equipment widely used in machining, welding, casting, and other fields. They are used for grinding, cutting, and removing burrs and flash from metal workpieces. Their core function is to prevent sparks from igniting flammable gases, dust, or mixtures in the surrounding environment during processes that may generate sparks, thereby ensuring production safety.

[0003] Existing explosion-proof grinding machines typically employ a passive explosion-proof structure, mainly consisting of a sealed or semi-sealed protective cover, a high-speed rotating grinding wheel, and a spindle motor that drives the grinding wheel. Their explosion-proof principle relies primarily on the physical isolation provided by the protective cover, limiting the range of sparks and hot particles, and isolating the external explosive environment to a certain extent through the cover structure.

[0004] However, existing explosion-proof grinding machines do not have dust collection mechanisms. When grinding, cutting, and cleaning burrs on metal workpieces, the dust generated will escape into the working environment, posing a health hazard to workers. At the same time, when the metal dust accumulated inside the protective cover comes into contact with high-speed sparks, there is a serious safety hazard of dust explosion. Summary of the Invention

[0005] The purpose of this invention is to provide an explosion-proof grinding wheel device and its usage method, aiming to solve the technical problem that existing explosion-proof grinding wheel machines do not have a dust collection mechanism. When grinding, cutting, and cleaning burrs on metal workpieces, the dust generated will be dispersed in the working environment, causing health hazards to workers. At the same time, when the metal dust accumulated inside the protective cover comes into contact with high-speed sparks, there is a serious safety hazard of dust explosion.

[0006] To achieve the above objectives, the present invention provides an explosion-proof grinding wheel device, comprising a base, a controller, a protective housing, an explosion-proof protective cover, a drive motor, a grinding wheel body, and a dust collection mechanism. The controller is located at the top of the base, the protective housing is located on the side of the base, the explosion-proof protective cover is installed inside the protective housing, the drive motor is installed inside the base, the grinding wheel body is located at the output end of the drive motor, the grinding wheel body is located inside the explosion-proof protective cover, and the explosion-proof protective cover has a working window. The dust collection mechanism includes a vertical collection cylinder, an exhaust fan, a main exhaust pipe, a first branch pipe, a second branch pipe, a collection hood, and a dust suppression spray assembly. The vertical collection cylinder is installed on the side of the base. An air outlet is provided at the top of the vertical collection cylinder, and an air inlet is provided on the side of the bottom of the vertical collection cylinder. The exhaust fan is also provided outside the base. The output end of the exhaust fan is connected to the air outlet through a pipe. One end of the main exhaust pipe is connected to the air inlet, and the other end of the main exhaust pipe is connected to the first branch pipe and the second branch pipe. The end of the first branch pipe away from the main exhaust pipe is connected to the explosion-proof protective cover. The collection hood is provided at the end of the second branch pipe away from the main exhaust pipe. The collection hood corresponds to the working window. The dust suppression spray assembly is provided on the vertical collection cylinder.

[0007] The dust suppression spraying assembly includes a main conveying pipe, multiple annular pipes, and multiple spray heads. The main conveying pipe is installed inside the vertical collection cylinder, and its top end extends to the outside of the vertical collection cylinder. The top end of the main conveying pipe is connected to an external water source. Multiple annular pipes are evenly arranged on the main conveying pipe, and multiple spray heads are arranged on each annular pipe.

[0008] The conveying main pipe is provided with support members at both ends. One end of the support member is connected to the inner wall of the vertical collecting cylinder, and the other end of the support member is located outside the conveying main pipe.

[0009] The vertical collecting cylinder is provided with an external mounting frame, and the vertical collecting cylinder is fixed to the side wall of the base by the mounting frame.

[0010] The mounting frame is equipped with a fixing ring, the vertical collection cylinder is fixed inside the mounting frame by the fixing ring, and the exhaust fan is installed at the top of the mounting frame.

[0011] The explosion-proof grinding wheel device also includes a collection bag and a sewage pipe. A connecting pipe is provided at the bottom of the vertical collection cylinder, and the collection bag is installed at the bottom of the connecting pipe. One end of the sewage pipe is connected to the connecting pipe, and the other end of the sewage pipe is connected to an external sewage tank. The sewage pipe is located outside the collection bag.

[0012] The collection bag is a disposable item, and it is secured to the bottom of the connecting tube by a rubber ring.

[0013] The present invention also provides a method of using an explosion-proof grinding wheel device, applicable to the explosion-proof grinding wheel device as described above, comprising the following steps: Start the exhaust fan to establish a stable negative pressure suction airflow in the main exhaust pipe, the first branch pipe and the second branch pipe, in preparation for dust collection. The dust generated and diffused inside the explosion-proof protective cover during grinding operations is promptly discharged by continuously sucking the internal space of the explosion-proof protective cover through the first branch pipe. The collection hood at the front end of the second branch pipe effectively captures and sucks up dust that escapes from the working window into the external environment; Activate the spray dust suppression component on the vertical collection cylinder to spray water mist downwards, so that the dust particles in the rising airflow are fully wetted, increased in weight, and then settle to the bottom of the cylinder; After confirming that the dust collection mechanism is operating normally, the drive motor is started to drive the grinding wheel body to rotate at high speed, and the grinding, cutting or cleaning of the workpiece begins. After the grinding operation is completed, the dust collection mechanism is kept running for a period of time to ensure that the residual dust is completely removed. Finally, the sediment at the bottom of the vertical collection cylinder is cleaned up.

[0014] This invention discloses an explosion-proof grinding wheel device and its usage method, comprising a base, a controller, a protective housing, an explosion-proof protective cover, a drive motor, a grinding wheel body, and a dust collection mechanism. The dust collection mechanism includes a vertical collection cylinder, an exhaust fan, a main exhaust pipe, a first branch pipe, a second branch pipe, a collection cover, and a spray dust suppression component. When the exhaust fan is activated, a stable negative pressure suction airflow is established in the main exhaust pipe, the first branch pipe, and the second branch pipe. The first branch pipe continuously draws suction from the internal space of the explosion-proof protective cover, promptly discharging dust generated and diffused within the explosion-proof protective cover during grinding operations. The collection cover at the front end of the second branch pipe effectively captures and sucks up dust escaping from the working window into the external environment. The spray dust suppression component on the vertical collection cylinder is activated, spraying water mist downwards, causing dust particles in the rising airflow to be fully wetted, gain weight, and settle to the bottom of the cylinder, thus completing the safe collection of dust during workpiece processing while simultaneously ensuring explosion-proof safety and occupational health. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the explosion-proof grinding wheel device according to the first embodiment of the present invention.

[0017] Figure 2 This invention provides Figure 1 A magnified view of the local structure at point A.

[0018] Figure 3 This invention provides Figure 1 A structural diagram from another perspective.

[0019] Figure 4 This is a schematic diagram of the internal structure of the vertical collecting cylinder in the first embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the disassembled structure of the sewage pipe and the connecting pipe in the second embodiment of the present invention.

[0021] Figure 6 This is a flowchart illustrating the steps of using the explosion-proof grinding wheel device provided by the present invention.

[0022] 101-Base, 102-Controller, 103-Protective housing, 104-Explosion-proof protective cover, 105-Drive motor, 106-Grinding wheel body, 107-Vertical collection cylinder, 108-Exhaust fan, 109-Exhaust main pipe, 110-First branch pipe, 111-Second branch pipe, 112-Collection cover, 113-Conveying main pipe, 114-Annular pipe, 115-Spray head, 116-Working window, 117-Air outlet, 118-Air inlet, 119-Support component, 120-Mounting bracket, 121-Fixing ring, 201-Collection bag, 202-Drainage pipe, 203-Connecting pipe, 204-Rubber ring retainer. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated 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 intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] First embodiment: Please see Figures 1 to 4 ,in Figure 1 This is a structural schematic diagram of the explosion-proof grinding wheel device according to the first embodiment. Figure 2 yes Figure 1 A magnified view of the local structure at point A. Figure 3 yes Figure 1 Another structural diagram from the perspective of Figure 4 This is a schematic diagram of the internal structure of the vertical collecting cylinder in the first embodiment.

[0025] This invention provides an explosion-proof grinding wheel device, comprising a base 101, a controller 102, a protective housing 103, an explosion-proof protective cover 104, a drive motor 105, a grinding wheel body 106, and a dust collection mechanism. The dust collection mechanism includes a vertical collection cylinder 107, an exhaust fan 108, a main exhaust pipe 109, a first branch pipe 110, a second branch pipe 111, a collection cover 112, and a spray dust suppression assembly. The spray dust suppression assembly includes a main conveying pipe 113, multiple annular pipes 114, and multiple spray nozzles 115. This solution addresses the problem that existing explosion-proof grinding wheel machines lack a dust collection mechanism, resulting in dust escaping into the working environment during grinding, cutting, and burr removal of metal workpieces, posing a health hazard to workers. Furthermore, the metal dust accumulated inside the protective cover poses a serious safety hazard when it comes into contact with high-speed sparks, potentially causing a dust explosion. Therefore, it is understood that the aforementioned solution can be applied to the structure of explosion-proof grinding wheel machines.

[0026] In this specific embodiment, the controller 102 is provided at the top of the base 101, the protective housing 103 is provided on the side of the base 101, the explosion-proof protective cover 104 is installed inside the protective housing 103, the drive motor 105 is installed inside the base 101, the grinding wheel body 106 is provided at the output end of the drive motor 105, the grinding wheel body 106 is located inside the explosion-proof protective cover 104, the explosion-proof protective cover 104 is provided with a working window 116, and the vertical collection cylinder 10... 7 is installed on the side of the base 101. An air outlet 117 is provided at the top of the vertical collection cylinder 107, and an air inlet 118 is provided on the side of the bottom of the vertical collection cylinder 107. An exhaust fan 108 is also provided outside the base 101. The output end of the exhaust fan 108 is connected to the air outlet 117 via a pipe. One end of the main exhaust pipe 109 is connected to the air inlet 118, and the other end of the main exhaust pipe 109 is connected to the first branch pipe 110 and the second branch pipe 111. The first branch pipe 110... One end of the second branch pipe 111, away from the main exhaust pipe 109, is connected to the explosion-proof protective cover 104. The collection cover 112 is installed at the end of the second branch pipe 111 away from the main exhaust pipe 109, and the collection cover 112 corresponds to the working window 116. The spray dust suppression assembly is installed on the vertical collection cylinder 107. When the exhaust fan 108 is started, a stable negative pressure suction airflow is established in the main exhaust pipe 109, the first branch pipe 110, and the second branch pipe 111. The explosion-proof protective cover 104 is continuously drawn through the first branch pipe 110. The internal space of the protective cover 104 promptly discharges the dust generated and diffused within the explosion-proof protective cover 104 during grinding operations. The dust that escapes from the working window 116 into the external environment is effectively captured and sucked up by the collection cover 112 at the front end of the second branch pipe 111. The spray dust suppression component on the vertical collection cylinder 107 is activated to spray water mist downwards, so that the dust particles in the rising airflow are fully wetted, become heavier, and settle to the bottom of the cylinder, thereby completing the safe collection of dust during workpiece processing, while also taking into account the functions of explosion-proof safety and occupational health.

[0027] The main conveying pipe 113 is installed inside the vertical collecting cylinder 107, with its top end extending to the outside of the cylinder. The top end of the main conveying pipe 113 is connected to an external water source. Multiple annular pipes 114 are evenly distributed on the main conveying pipe 113, and each annular pipe 114 is equipped with multiple spray nozzles 115. The main conveying pipe 113 introduces external water into the vertical collecting cylinder 107 and distributes it through the evenly distributed annular pipes 114. 4. The water flow is distributed to the entire cross-sectional area of ​​the vertical collection cylinder 107; the multiple spray heads 115 provided on each of the annular pipes 114 together form a three-dimensional water mist curtain covering the entire airflow channel. When the dust-laden airflow passes through, the dust particles collide, wet and condense fully with the fine water mist, effectively increasing the weight of the dust and accelerating its settling. While significantly improving the dust collection efficiency, it also eliminates the hidden danger of dust explosion through wetting and avoids the secondary flying of dust in the vertical collection cylinder 107.

[0028] Secondly, both ends of the conveying main pipe 113 are provided with support members 119. One end of the support member 119 is connected to the inner wall of the vertical collection cylinder 107, and the other end of the support member 119 is located outside the conveying main pipe 113. The installation of the conveying main pipe 113 is completed by setting the support member 119.

[0029] Meanwhile, a mounting bracket 120 is provided on the outside of the vertical collection cylinder 107. The vertical collection cylinder 107 is fixed to the side wall of the base 101 by the mounting bracket 120. The mounting bracket 120 facilitates the installation of the vertical collection cylinder 107 and the exhaust fan 108.

[0030] In addition, a fixing ring 121 is provided on the mounting frame 120, and the vertical collection cylinder 107 is fixed inside the mounting frame 120 by the fixing ring 121. The exhaust fan 108 is installed at the top of the mounting frame 120. The installation of the vertical collection cylinder 107 is completed by the setting of the fixing ring 121.

[0031] Furthermore, the bottom of the vertical collection cylinder 107 is designed with an inverted conical shape to facilitate the subsequent treatment of dust that settles at the bottom of the vertical collection cylinder 107.

[0032] When using the explosion-proof grinding wheel device of this embodiment, the exhaust fan 108 is started to establish a stable negative pressure suction airflow in the main exhaust pipe 109, the first branch pipe 110, and the second branch pipe 111. The first branch pipe 110 continuously draws air from the internal space of the explosion-proof protective cover 104, timely discharging the dust generated and diffused inside the explosion-proof protective cover 104 during grinding operations. The collection hood 112 at the front end of the second branch pipe 111 effectively captures and draws in the dust that escapes from the working window 116 into the external environment. The conveying main pipe 113 introduces external water into the vertical collection cylinder 107 and distributes it evenly. Multiple annular pipes 114 distribute water flow across the entire cross-sectional area of ​​the vertical collection cylinder 107. Multiple spray heads 115 installed on each annular pipe 114 together form a three-dimensional water mist curtain covering the entire airflow channel. When the dust-laden airflow passes through, the dust particles collide, wet, and condense fully with the fine water mist, effectively increasing the weight of the dust and accelerating its settling. While significantly improving the dust collection efficiency, the humidification effect also eliminates the risk of dust explosion and prevents secondary dust re-entrainment within the vertical collection cylinder 107. With the above structure, the safe collection of dust during workpiece processing is achieved, while also taking into account explosion-proof safety and occupational health functions.

[0033] Second embodiment: Based on the first embodiment, please refer to Figure 5 , Figure 5 This is a schematic diagram of the disassembled structure of the sewage pipe and the connecting pipe in the second embodiment.

[0034] The present invention provides an explosion-proof grinding wheel device, which also includes a collection bag 201 and a sewage pipe 202.

[0035] In this specific embodiment, a connecting pipe 203 is provided at the bottom of the vertical collection cylinder 107, and a collection bag 201 is installed at the bottom of the connecting pipe 203. One end of the sewage pipe 202 is connected to the connecting pipe 203, and the other end of the sewage pipe 202 is connected to an external sewage tank. The sewage pipe 202 is located outside the collection bag 201. The connecting pipe 203 and the collection bag 201 at the bottom of the vertical collection cylinder 107 can effectively receive the mud-like dust mixture that settles after being wetted by the spray dust suppression component, realizing the centralized containment and temporary storage of solid waste and effectively preventing secondary pollution during the treatment process. At the same time, the sewage pipe 202, which is connected to the connecting pipe 203 and leads to the external sewage tank, is responsible for timely discharge of any excess spray liquid or liquid waste that may accumulate in the vertical collection cylinder 107.

[0036] The collection bag 201 is a disposable item. The collection bag 201 is snapped into the bottom of the connecting pipe 203 by a rubber ring 204. By setting the collection bag 201 as a disposable item and using the rubber ring 204 to snap into the connecting pipe 203, the convenience and hygiene standards of dust cleaning operations are significantly improved.

[0037] When using the explosion-proof grinding wheel device of this embodiment, the connecting pipe 203 and the collection bag 201 at the bottom of the vertical collection cylinder 107 can effectively receive the muddy dust mixture that settles after being wetted by the spray dust suppression component, realizing centralized containment and temporary storage of solid waste and effectively preventing secondary pollution during the treatment process. At the same time, the sewage pipe 202, which is connected to the connecting pipe 203 and leads to the external sewage tank, is responsible for timely discharge of any excess spray liquid or liquid waste that may accumulate in the vertical collection cylinder 107. Furthermore, by setting the collection bag 201 as a disposable item and using the rubber ring retainer 204 to quickly engage with the connecting pipe 203, the convenience and hygiene standards of dust cleaning operations are significantly improved.

[0038] Please see Figure 6 The present invention also provides a method for using an explosion-proof grinding wheel device, applicable to the explosion-proof grinding wheel device as described above, comprising the following steps: S1: Start the exhaust fan 108 to establish a stable negative pressure suction airflow in the main exhaust pipe 109, the first branch pipe 110 and the second branch pipe 111, in preparation for dust collection. S2: The internal space of the explosion-proof protective cover 104 is continuously sucked through the first branch pipe 110 to promptly remove the dust generated and diffused inside the explosion-proof protective cover 104 during the grinding operation; S3: The dust that escapes from the working window 116 into the external environment is effectively captured and sucked up by the collection hood 112 at the front end of the second branch pipe 111; S4: Activate the spray dust suppression component on the vertical collection cylinder 107 to spray water mist downwards, so that the dust particles in the rising airflow are fully wetted, increased in weight, and then settle to the bottom of the cylinder. S5: After confirming that the dust collection mechanism is operating normally, start the drive motor 105 to drive the grinding wheel body 106 to rotate at high speed and start the grinding, cutting or cleaning operation of the workpiece. S6: After the grinding operation is completed, keep the dust collection mechanism running for a period of time to ensure that the residual dust is completely removed, and finally clean the sediment at the bottom of the vertical collection cylinder 107.

[0039] In this embodiment, the exhaust fan 108 is first activated before operation to create a negative pressure collection environment. Dust inside the explosion-proof protective cover 104 and diffused dust outside are treated using dual-branch pipelines. Then, the spray dust suppression component is activated to wet and increase the weight of the captured dust. Under the premise of ensuring the stable operation of the dust collection mechanism, the grinding process is started. After the operation is completed, the dust collection mechanism is kept running to remove residual dust, and finally the sediment is cleaned up. This standardized process realizes closed-loop control of the entire process from dust generation, collection to treatment, which effectively prevents the risk of dust explosion and ensures the air quality of the workplace.

[0040] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. An explosion-proof grinding wheel device, comprising a base, a controller, a protective housing, an explosion-proof protective cover, a drive motor, and a grinding wheel body, wherein the controller is disposed at the top of the base, the protective housing is disposed on the side of the base, the explosion-proof protective cover is installed inside the protective housing, the drive motor is installed inside the base, the grinding wheel body is disposed at the output end of the drive motor, the grinding wheel body is located inside the explosion-proof protective cover, and the explosion-proof protective cover is provided with a working window, characterized in that... It also includes dust collection facilities; The dust collection mechanism includes a vertical collection cylinder, an exhaust fan, a main exhaust pipe, a first branch pipe, a second branch pipe, a collection hood, and a dust suppression spray assembly. The vertical collection cylinder is installed on the side of the base. An air outlet is provided at the top of the vertical collection cylinder, and an air inlet is provided on the side of the bottom of the vertical collection cylinder. The exhaust fan is also provided outside the base. The output end of the exhaust fan is connected to the air outlet through a pipe. One end of the main exhaust pipe is connected to the air inlet, and the other end of the main exhaust pipe is connected to the first branch pipe and the second branch pipe. The end of the first branch pipe away from the main exhaust pipe is connected to the explosion-proof protective cover. The collection hood is provided at the end of the second branch pipe away from the main exhaust pipe. The collection hood corresponds to the working window. The dust suppression spray assembly is provided on the vertical collection cylinder.

2. The explosion-proof grinding wheel device as described in claim 1, characterized in that, The dust suppression spray assembly includes a main conveying pipe, multiple annular pipes, and multiple spray nozzles. The main conveying pipe is installed inside the vertical collection cylinder, and its top end extends to the outside of the vertical collection cylinder. The top end of the main conveying pipe is connected to an external water source. Multiple annular pipes are evenly arranged on the main conveying pipe, and multiple spray nozzles are arranged on each annular pipe.

3. The explosion-proof grinding wheel device as described in claim 2, characterized in that, Both ends of the conveying main pipe are provided with support members. One end of the support member is connected to the inner wall of the vertical collecting cylinder, and the other end of the support member is located outside the conveying main pipe.

4. The explosion-proof grinding wheel device as described in claim 3, characterized in that, The vertical collecting cylinder is provided with an external mounting bracket, and the vertical collecting cylinder is fixed to the side wall of the base by the mounting bracket.

5. The explosion-proof grinding wheel device as described in claim 4, characterized in that, The mounting frame is equipped with a fixing ring, and the vertical collection cylinder is fixed inside the mounting frame by the fixing ring. The exhaust fan is installed at the top of the mounting frame.

6. The explosion-proof grinding wheel device as described in claim 1, characterized in that, The explosion-proof grinding wheel device also includes a collection bag and a sewage pipe. A connecting pipe is provided at the bottom of the vertical collection cylinder, and the collection bag is installed at the bottom of the connecting pipe. One end of the sewage pipe is connected to the connecting pipe, and the other end of the sewage pipe is connected to an external sewage tank. The sewage pipe is located outside the collection bag.

7. The explosion-proof grinding wheel device as described in claim 6, characterized in that, The collection bag is a disposable item, and it is secured to the bottom of the connecting tube by a rubber ring.

8. A method of using an explosion-proof grinding wheel device, applied to the explosion-proof grinding wheel device as described in claim 1, characterized in that, Includes the following steps: Start the exhaust fan to establish a stable negative pressure suction airflow in the main exhaust pipe, the first branch pipe and the second branch pipe, in preparation for dust collection. The dust generated and diffused inside the explosion-proof protective cover during grinding operations is promptly discharged by continuously sucking the internal space of the explosion-proof protective cover through the first branch pipe. The collection hood at the front end of the second branch pipe effectively captures and sucks up dust that escapes from the working window into the external environment; Activate the spray dust suppression component on the vertical collection cylinder to spray water mist downwards, so that the dust particles in the rising airflow are fully wetted, increased in weight, and then settle to the bottom of the cylinder; After confirming that the dust collection mechanism is operating normally, the drive motor is started to drive the grinding wheel body to rotate at high speed, and the grinding, cutting or cleaning of the workpiece begins. After the grinding operation is completed, the dust collection mechanism is kept running for a period of time to ensure that the residual dust is completely removed. Finally, the sediment at the bottom of the vertical collection cylinder is cleaned up.

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