Airflow impurity removal device

Abstract

The invention discloses an airflow impurity removal device, and relates to the technical field of dust filtration and removal, the airflow impurity removal device comprises a fiber separation module and a dust removal module, the gas input end of the fiber separation module is used for being communicated with an exhaust port of a production line, and the gas output end of the fiber separation module is communicated with the gas input end of the dust removal module; the fiber separation module can separate short fibers in dirty gas from dust and output the short fibers, the fiber separation module can also introduce gas carrying dust into the dust removal module, and the dust removal module can separate the dust in the gas carrying the dust side by side. And the service life of equipment can be prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of dust filtering and dust removal, and in particular to an airflow impurity removal device. Background Art

[0002] In the production of disposable sanitary products, production lines using air-laid technology are also widely used. Most air-laid processes are suitable for ultra-short fibers, which are easily mixed into the air discharged from the production line, forming dirty airflow with fibers and impurities, which will cause pollution to the air environment. However, most current airflow impurity removal devices can only remove dust and short fibers and output clean air, but cannot separate short fibers from dust, which results in the short fibers discharged from the production line cannot be recycled, resulting in a waste of resources; moreover, the simultaneous separation of short fibers and dust brings a greater load to the equipment and reduces the service life of the equipment. Therefore, there is an urgent need for an airflow impurity removal device that can recycle short fibers and extend the service life of the equipment. Summary of the invention

[0003] The purpose of the present invention is to provide an airflow impurity removal device to solve the problems existing in the above-mentioned prior art, to be able to recycle short fibers and to extend the service life of the equipment.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides an air flow impurity removal device, comprising: a fiber separation module and a dust removal module, wherein the gas input end of the fiber separation module is used to be connected with the exhaust port of the production line, and the gas output end of the fiber separation module is connected with the gas input end of the dust removal module, the fiber separation module can separate short fibers from dust in dirty gas and output the short fibers, the fiber separation module can also pass gas carrying dust into the dust removal module, and the dust removal module can separate and discharge dust in the gas carrying dust.

[0006] Preferably, the fiber separation module includes: a fiber separator, the fiber separator includes a first shell, a first driving device, a screen and a supporting structure, the screen and the supporting structure are both arranged in the first shell, the first shell is provided with a first air inlet, a first air outlet and a fiber outlet, the first air inlet is used to be connected with the exhaust device of the production line, the first air outlet is connected with the gas input end of the dust removal module, the first driving device is fixedly mounted on the shell, the supporting structure is fixedly connected with the output end of the first driving device, the screen surrounds the supporting structure and encloses a filter structure with openings at both ends, the opening at one end of the filter structure is connected with the first air inlet, the opening at the other end of the filter structure is connected with the fiber outlet, and the first driving device can drive the filter structure to rotate around the first rotating shaft.

[0007] Preferably, the supporting structure includes a drive shaft and a threaded roller, the drive shaft is vertically arranged and forms the first rotating shaft, the upper end of the drive shaft is fixedly connected to the output end of the first driving device, the threaded roller is a conical spiral structure, the axis of the drive shaft coincides with the high line of the threaded roller, the threaded roller is fixedly connected to the drive shaft, the screen is wrapped around the outside of the threaded roller and forms a funnel-shaped filtering structure, the large end of the filtering structure is upward and connected to the first air inlet, and the small end of the filtering structure is downward and connected to the fiber outlet.

[0008] Preferably, the fiber separation module also includes a pre-filter, which includes a second shell, a pre-filter and a dust collection assembly. The second shell is provided with a second air inlet, a third air inlet and a second air outlet. The second air inlet forms a gas input end of the fiber separation module, and the second air outlet forms a gas output end of the fiber separation module. A pre-filter is fixedly installed at the second air outlet, and the pre-filter covers the second air outlet. The third air inlet is connected to the first air outlet of the fiber separator. The dust collection assembly is arranged in the second shell, and the dust collection assembly is connected to the first air inlet of the limit separator. The side of the pre-filter facing the inside of the shell is an attachment surface, and the dust collection assembly can suck in attachments on the attachment surface and transport them into the fiber separator.

[0009] Preferably, the dust collection assembly includes a dust collector and a transmission mechanism, the transmission mechanism has a free end, the dust collector is fixedly connected to the free end, the suction port of the dust collector faces the attachment surface, the exhaust port of the dust collector is connected to the first air inlet, and the free end can move to drive the dust collector to move.

[0010] Preferably, the transmission mechanism includes a driving device and a transmission chain, the output shaft of the driving device is transmission-connected to the transmission chain, the transmission chain is extended along a first straight line and forms the free end of the transmission mechanism, the cross-sectional shape of the first air outlet is rectangular, the pre-filter is rectangular, the first straight line is parallel to the long side of the pre-filter, and the length of the vacuum cleaner suction port perpendicular to the first straight line is equal to the length of the short side of the pre-filter.

[0011] Preferably, the mesh number of the sieve is greater than the mesh number of the pre-filter.

[0012] Preferably, the mesh size of the sieve is 50-100 meshes, and the mesh size of the pre-filter is 30-90 meshes.

[0013] Preferably, the dust removal module includes a dust filter, and the dust filter is a cage-type dust filter, wherein the air inlet of the dust filter forms the gas input end of the dust removal module, and the air outlet of the dust filter forms the gas output end of the dust removal module.

[0014] Preferably, the dust removal module also includes a dust collector, which includes a third shell, a filter bag and a cleaning pipe, the third shell is provided with a fourth air inlet, a dust outlet and a third air outlet, a dust extraction device is provided in the dust filter, the dust extraction device is connected with the fourth air inlet, the dust extraction device can suck in dust attached to the cage of the rotary cage type dust filter and transport it to the third shell through the fourth air inlet, the dust outlet is located at the bottom of the third shell, the filter bag is fixedly arranged in the third shell and above the dust outlet, one end of the cleaning pipe is connected and communicated with the filter bag, and the other end is used for passing clean gas, and the dust outlet is used to communicate with the dust collecting container.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] In the airflow impurity removal device provided by the present invention, the dirty gas discharged from the production line first enters the fiber separation module, the fiber separation module separates short fibers from particulate dust, and the fiber separation module outputs short fibers, which can be recycled; at this time, the gas containing only dust enters the dust removal module, and the dust removal module separates the gas and dust and discharges them separately. Since the fiber separation module and the dust removal module form a gradient filtration, the filtration pressure of the dust removal module is greatly reduced, and the service life of the equipment is extended. The dust discharged from the dust removal module is collected and processed, and the clean gas can be discharged into the atmosphere or used to replenish the air in the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of the airflow impurity removal device provided by the present invention;

[0019] Figure 2 for Figure 1 A front view of the fiber separator;

[0020] Figure 3 for Figure 1 A front view of the middle pre-filter;

[0021] Figure 4 for Figure 3 A top view of the middle pre-filter;

[0022] Figure 5 for Figure 1 A front view of the middle dust collector;

[0023] In the figure: 1. fiber separation module; 11. fiber separator; 111. first shell; 112. screen; 113. threaded roller; 114. drive shaft; 115. first air inlet; 116. first air outlet; 117. fiber outlet; 118. first drive device; 12. pre-filter; 121. second shell; 122. pre-filter; 123. dust extractor; 124. transmission chain; 125. second air inlet; 126. third air inlet; 127. second air outlet; 2. dust removal module; 21. dust filter; 22. dust collector; 221. third shell; 222. filter bag; 223. cleaning duct; 224. fourth air inlet; 225. dust outlet; 226. third air outlet; 3. production line. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The purpose of the present invention is to provide an airflow impurity removal device to solve the problems existing in the above-mentioned prior art, to be able to recycle short fibers and to extend the service life of the equipment.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The present invention provides an airflow impurity removal device, such as Figure 1-5 As shown, it includes: a fiber separation module 1 and a dust removal module 2, the gas input end of the fiber separation module 1 is used to communicate with the exhaust port of the production line 3, the gas output end of the fiber separation module 1 is connected with the gas input end of the dust removal module 2, the fiber separation module 1 can separate the short fibers from the dust in the dirty gas and output the short fibers, the fiber separation module 1 can also pass the dust-carrying gas into the dust removal module 2, and the dust removal module 2 can separate and discharge the dust in the dust-carrying gas.

[0028] In the airflow impurity removal device provided by the present invention, the dirty gas discharged from the production line 3 first enters the fiber separation module 1, the fiber separation module 1 separates the short fibers and the granular dust, and the fiber separation module 1 outputs the short fibers, which can be recycled; at this time, the gas containing only dust enters the dust removal module 2, and the dust removal module 2 separates the gas and the dust and discharges them separately. Since the fiber separation module 1 and the dust removal module 2 form a gradient filtration, the filtration pressure of the dust removal module 2 is greatly reduced, and the service life of the equipment is extended. The dust discharged from the dust removal module 2 is collected and processed, and the clean gas can be discharged into the atmosphere or used to replenish the air of the production line 3.

[0029] In a preferred implementation manner of the present embodiment, the fiber separation module 1 includes: a fiber separator 11, the fiber separator 11 includes a first shell 111, a first drive device 118, a screen 112 and a supporting structure, the screen 112 and the supporting structure are both arranged in the first shell 111, and the first shell 111 is provided with a first air inlet 115, a first air outlet 116 and a fiber outlet 117, the first air inlet 115 is used to communicate with the exhaust device of the production line 3, the first air outlet 116 is connected to the gas input end of the dust removal module 2, the first drive device 118 is fixedly mounted on the shell, the support structure is fixedly connected to the output end of the first drive device 118, the screen 112 surrounds the support structure and encloses a filter structure with openings at both ends, the opening at one end of the filter structure is connected to the first air inlet 115, and the opening at the other end of the filter structure is connected to the fiber outlet 117, and the first drive device 118 can drive the filter structure to rotate around the first rotating axis. The dirty gas enters the fiber separator 11 from the first air inlet 115 and enters the filter structure from the opening at one end of the filter structure. At this time, the first driving device 118 drives the support structure to rotate and drives the screen 112 to rotate. The short fibers in the gas remain in the filter structure and are discharged through the fiber outlet 117. The dust in the gas is filtered out by the screen 112 and enters the dust removal module 2 through the first air outlet 116. The mesh size of the screen 112 should be larger than the particle size of the dust and smaller than the size of the short fibers.

[0030] In a preferred implementation manner of this embodiment, the support structure includes a drive shaft 114 and a threaded roller 113. The drive shaft 114 is vertically arranged and forms a first rotating shaft. The upper end of the drive shaft 114 is fixedly connected to the output end of the first drive device 118. The threaded roller 113 is a conical spiral structure. The axis of the drive shaft 114 coincides with the high line of the threaded roller 113. The threaded roller 113 is fixedly connected to the drive shaft 114. The screen 112 is wound around the outside of the threaded roller 113 to form a funnel-shaped filtering structure. The large end of the filtering structure is upward and connected to the first air inlet 115, and the small end of the filtering structure is downward and connected to the fiber outlet 117. The drive shaft 114 can rotate around its own axis under the drive of the first drive device 118, and drive the threaded roller 113 to rotate around the high line of the conical spiral. After the small particles of dust and short fibers enter the filter structure, they will stick to the inner side of the filter structure surrounded by the screen 112. As the filter structure rotates, the dust is filtered out under the action of centrifugal force, and the short fibers are gradually moved down to the fiber outlet 117 under the push of the threaded roller 113. By setting the conical spiral threaded roller 113 and the funnel-shaped filter structure, the short fibers and dust can be well separated. Among them, the threaded roller 113 is preferably made of anti-static material, and the rotation speed of the threaded roller 113 is preferably set to 5-50r / min.

[0031] In a preferred implementation manner of the present embodiment, the fiber separation module 1 also includes a pre-filter 12, the pre-filter 12 includes a second shell 121, a pre-filter 122 and a dust collection assembly, the second shell 121 is provided with a second air inlet 125, a third air inlet 126 and a second air outlet 127, the second air inlet 125 forms a gas input end of the fiber separation module 1, the second air outlet 127 forms a gas output end of the fiber separation module 1, the pre-filter 122 is fixedly installed at the second air outlet 127, the pre-filter 122 covers the second air outlet 127, the third air inlet 126 is connected to the first air outlet 116 of the fiber separator 11, the dust collection assembly is arranged in the second shell 121, the dust collection assembly is connected to the first air inlet 115 of the limit separator, the side of the pre-filter 122 facing the inside of the shell is an attachment surface, and the dust collection assembly can suck in attachments on the attachment surface and transport them to the fiber separator 11. The dirty gas discharged from the production line 3 first enters the pre-filter 12, and the pre-filter 122 filters out part of the dust. The short fibers and the unfiltered dust remain on the attachment surface. The dust suction component sucks the dust and short fibers on the attachment surface and transports them to the fiber separator 11 to separate the short fibers and the remaining dust. After the short fibers are discharged, the dust-containing gas in the fiber separator 11 is input into the pre-filter module through the third air inlet 126, and passes through the filter to enter the dust removal module 2 for subsequent processing. It may not be possible to filter out all the dust by relying solely on the fiber filter for filtering. By setting the pre-filter 12, a part of the dust can be filtered in advance, and then filtered through the fiber filter, so that the dust filtering effect is better, and the load of the fiber filter can also be reduced. In addition, the dust-containing gas in the fiber separation module 1 passes through the pre-filter 12 and enters the dust removal module 2, which can prevent dust from entering the atmosphere and causing environmental pollution.

[0032] In a preferred implementation of the present embodiment, the dust collection assembly includes a dust collector 123 and a transmission mechanism, the transmission mechanism has a free end, the dust collector 123 is fixedly connected to the free end, the suction port of the dust collector 123 faces the attachment surface, the exhaust port of the dust collector 123 is connected to the first air inlet 115, and the free end can drive the dust collector 123 to move. The dust collection assembly can move under the drive of the transmission mechanism to remove dust on the entire attachment surface, so as to achieve a better cleaning effect. Among them, the second air outlet 127 is preferably set downward, the suction port of the vacuum cleaner 123 is rectangular, the suction port is downward and toward the pre-filter 122, and a baffle is obliquely arranged inside the vacuum cleaner 123. The inclination angle of the baffle is preferably 15°-45°. By setting the baffle, the space above the suction port is gradually reduced, so that the suction force at the suction port is more uniform; the exhaust port of the vacuum cleaner 123 is connected to the first air inlet 115 of the fiber separator 11 through a pipe, and the pipe can use a retractable corrugated pipe or a hose with a length not less than the longest distance between the vacuum cleaner 123 and the first air inlet 115.

[0033] In a preferred implementation of this embodiment, the transmission mechanism includes a second driving device and a transmission chain 124, the output shaft of the second driving device is connected to the transmission chain 124, the transmission chain 124 is extended along the first straight line and forms the free end of the transmission mechanism, the dust collector 123 is fixedly connected to the transmission chain 124, the cross-sectional shape of the first air outlet 116 is rectangular, the pre-filter 122 is rectangular, the first straight line is parallel to the long side of the pre-filter 122, and the length of the suction port of the dust collector 123 perpendicular to the first straight line is equal to the length of the short side of the pre-filter 122. The transmission chain 124 can reciprocate under the drive of the driving device, thereby driving the dust collector 123 to reciprocate along the straight line; the length of the suction port of the dust collector 123 perpendicular to the first straight line is equal to the length of the short side of the pre-filter 122, and the dust collector 123 can just cover the entire attachment surface during the reciprocating motion along the straight line, thereby preventing dust and short fibers from being missed and improving the impurity absorption effect. Among them, the second driving device is preferably a motor.

[0034] It should be noted that, in addition to the transmission chain 124, the movement of the vacuum cleaner 123 can also be driven by a variety of methods such as a mechanical arm and an electrically driven track slider. The shape and size of the suction port of the vacuum cleaner 123 and the pre-filter 122 can also be set as needed. For example, the suction port of the vacuum cleaner 123 and the pre-filter 122 can both be set to be circular, and the diameter of the suction port of the vacuum cleaner 123 is half the diameter of the pre-filter 122. A mechanical arm is installed in the second shell 121, and the vacuum cleaner 123 is fixedly connected to the free end of the mechanical arm. The vacuum cleaner 123 moves under the drive of the mechanical arm (can move along a curve), and the area covered by the movement of the suction port can also cover the entire pre-filter 122.

[0035] In a preferred implementation of the present embodiment, the mesh number of the screen 112 is greater than the mesh number of the pre-filter 122. When the mesh number of the screen 112 is greater than the mesh number of the pre-filter 122, the pre-filter 12 pre-filters small-size dust and large-size dust, and the fiber separator 11 again passes through the unfiltered small-size dust, thereby improving the dust filtering effect.

[0036] In a preferred implementation manner of this embodiment, the mesh size of the screen 112 is 50-100 meshes, and the mesh size of the pre-filter 122 is 30-90 meshes.

[0037] In a preferred implementation of the present embodiment, the dust removal module 2 includes a dust filter 21, which is a rotating cage dust filter 21, the air inlet of the dust filter 21 forms the gas input end of the dust removal module 2, and the air outlet of the dust filter 21 forms the gas output end of the dust removal module 2. The rotating cage dust filter 21 can filter the dust-containing gas discharged from the fiber separation module 1 more finely, and discharge clean gas from the air outlet, and the filtering effect is better.

[0038] In a preferred embodiment of the present embodiment, the dust removal module 2 also includes a dust collector 22, which includes a third shell 221, a filter bag 222 and a cleaning pipe 223. The third shell 221 is provided with a fourth air inlet 224, a dust outlet 225 and a third air outlet 226. A dust extraction device is provided in the dust filter 21, and the dust extraction device is connected to the fourth air inlet 224. The dust extraction device can inhale dust attached to the cage of the cage-type dust filter 21 and transport it to the third shell 221 through the fourth air inlet 224. The dust outlet 225 is located at the bottom of the third shell 221, and the filter bag 222 is fixedly arranged in the third shell 221 and located above the dust outlet 225. One end of the cleaning pipe 223 is connected and communicated with the filter bag 222, and the other end is used to pass clean gas. The dust outlet 225 is used to communicate with the dust collecting container. The dust in the dust filter 21 can be sucked into the dust collector 22 by the dust filtering device. The dust contacts the filter bag 222 with the airflow in the dust collector 22 and is adsorbed on the filter bag 222. When there is a lot of dust attached to the filter bag 222, the dust removal device stops working, and the cleaning pipe 223 inputs clean gas into the filter bag 222, so that the dust in the filter bag 222 is blown out, and the dust is discharged from the dust collector 22 through the dust outlet 225. A dust collection container of any material can be set at the dust outlet 225 to collect dust. By setting up the dust collector 22, the filtered dust is well handled, making the device more environmentally friendly. Among them, the fourth air inlet 224 and the third air outlet 226 are respectively arranged on the opposite sides of the third shell 221, and the filter bag 222 is arranged with multiple, and they are all located between the fourth air inlet 224 and the third air outlet 226.

[0039] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An airflow impurity removal device, characterized in that: include: A fiber separation module and a dust removal module, wherein the gas input end of the fiber separation module is used to communicate with the exhaust port of the production line, and the gas output end of the fiber separation module is connected with the gas input end of the dust removal module. The fiber separation module can separate short fibers from dust in the dirty gas and output the short fibers. The fiber separation module can also pass the dust-carrying gas into the dust removal module, and the dust removal module can separate and discharge dust from the dust-carrying gas.

2. The airflow impurity removal device according to claim 1 is characterized in that: The fiber separation module includes: a fiber separator, which includes a first shell, a first drive device, a screen and a supporting structure. The screen and the supporting structure are both arranged in the first shell. The first shell is provided with a first air inlet, a first air outlet and a fiber outlet. The first air inlet is used to communicate with the exhaust device of the production line, and the first air outlet is connected to the gas input end of the dust removal module. The first drive device is fixedly mounted on the shell, and the supporting structure is fixedly connected to the output end of the first drive device. The screen surrounds the supporting structure and encloses a filter structure with openings at both ends. The opening at one end of the filter structure is connected to the first air inlet, and the opening at the other end of the filter structure is connected to the fiber outlet. The first drive device can drive the filter structure to rotate around a first rotating shaft.

3. The airflow impurity removal device according to claim 2 is characterized in that: The supporting structure includes a driving shaft and a threaded roller, the driving shaft is vertically arranged and forms the first rotating shaft, the upper end of the driving shaft is fixedly connected to the output end of the first driving device, the threaded roller is a conical spiral structure, the axis of the driving shaft coincides with the high line of the threaded roller, the threaded roller is fixedly connected to the driving shaft, the screen is wound around the threaded roller and forms a funnel-shaped filtering structure, the large end of the filtering structure is upward and connected to the first air inlet, and the small end of the filtering structure is downward and connected to the fiber outlet.

4. The airflow impurity removal device according to claim 2, characterized in that: The fiber separation module also includes a pre-filter, which includes a second shell, a pre-filter and a dust collection component. The second shell is provided with a second air inlet, a third air inlet and a second air outlet. The second air inlet forms a gas input end of the fiber separation module, and the second air outlet forms a gas output end of the fiber separation module. A pre-filter is fixedly installed at the second air outlet, and the pre-filter covers the second air outlet. The third air inlet is communicated with the first air outlet of the fiber separator. The dust collection component is arranged in the second shell, and the dust collection component is communicated with the first air inlet of the limit separator. The side of the pre-filter facing the inside of the shell is an attachment surface, and the dust collection component can suck in attachments on the attachment surface and transport them into the fiber separator.

5. The airflow impurity removal device according to claim 4, characterized in that: The dust collection assembly includes a dust collector and a transmission mechanism, the transmission mechanism has a free end, the dust collector is fixedly connected to the free end, the suction port of the dust collector faces the attachment surface, the exhaust port of the dust collector is connected to the first air inlet, and the free end can move to drive the dust collector to move.

6. The airflow impurity removal device according to claim 5, characterized in that: The transmission mechanism includes a driving device and a transmission chain, the output shaft of the driving device is transmission-connected to the transmission chain, the transmission chain is extended along a first straight line and forms a free end of the transmission mechanism, the cross-sectional shape of the first air outlet is a rectangle, the pre-filter is a rectangle, the first straight line is parallel to the long side of the pre-filter, and the length of the vacuum cleaner suction port perpendicular to the first straight line is equal to the length of the short side of the pre-filter.

7. The airflow impurity removal device according to claim 4, characterized in that: The mesh number of the sieve is greater than the mesh number of the pre-filter.

8. The airflow impurity removal device according to claim 7, characterized in that: The mesh number of the sieve is 50-100 meshes, and the mesh number of the pre-filter is 30-90 meshes.

9. The airflow impurity removal device according to claim 4, characterized in that: The dust removal module comprises a dust filter, which is a cage-type dust filter. The air inlet of the dust filter forms the gas input end of the dust removal module, and the air outlet of the dust filter forms the gas output end of the dust removal module.

10. The airflow impurity removal device according to claim 9, characterized in that: The dust removal module also includes a dust collector, which includes a third shell, a filter bag and a cleaning pipe. The third shell is provided with a fourth air inlet, a dust outlet and a third air outlet. A dust extraction device is provided in the dust filter, and the dust extraction device is connected with the fourth air inlet. The dust extraction device can inhale dust attached to the cage of the rotating cage type dust filter and transport it to the third shell through the fourth air inlet. The dust outlet is located at the bottom of the third shell, and the filter bag is fixedly arranged in the third shell and above the dust outlet. One end of the cleaning pipe is connected and communicated with the filter bag, and the other end is used for passing clean gas. The dust outlet is used to communicate with the dust collecting container.

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