A packaging machine and method of use thereof

Abstract

The application relates to the technical field of packaging equipment, and particularly discloses a packaging machine and a use method thereof, which comprises a packaging machine body, a first feeding port and a first discharging port are arranged on the packaging machine body, a cleaning unit is arranged on the first feeding port, the cleaning unit comprises a box body, a blowing mechanism for removing rice husks and dust in rice and a filtering mechanism for removing sand in the rice, a second feeding port and a second discharging port are arranged on the box body, the second discharging port is communicated with the first feeding port, the blowing mechanism and the filtering mechanism are arranged in the box body respectively, the blowing mechanism is arranged above the filtering mechanism, a blast hole for the blowing mechanism to discharge the rice husks and the dust and a pipeline for the filtering mechanism to discharge the sand are arranged on the side wall of the box body; the blowing mechanism and the filtering mechanism in the cleaning unit are used for cleaning and treating the rice husks, the dust, the sand and other sundries in the rice, so that the packaging quality of the rice is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and in particular to a packaging machine and its usage method. Background Technology

[0002] As one of the world's most important food sources, rice is usually sealed in packaging bags. In relatively humid environments, the packaging bags can protect the rice from moisture caused by the weather, thus preserving its original flavor and extending its shelf life.

[0003] With the continuous advancement of technology, rice packaging technology has become increasingly sophisticated. Chinese Patent Publication No. CN108357702A discloses a rice processing and packaging machine, which includes a main body with a feed inlet at the top, a tilting plate at the bottom, and a discharge outlet at the bottom. This machine automatically activates an alarm device when the rice is full and reaches a position sensor, emitting a buzzer and automatically closing a portion of the discharge baffle. However, existing technology has the following problems: after the rice is fed into the feed pipe at the top of the packaging machine, it directly enters the machine for quantitative packaging. During this packaging process, the rice is not cleaned, resulting in impurities such as rice husks, dust, and sand being packaged into the packaging bag, thus affecting the packaging quality.

[0004] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a packaging machine that can clean rice husks, dust and sand and other impurities in rice, thereby improving the packaging quality of rice.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The technical solution of this application proposes a packaging machine, which includes a packaging machine body. The packaging machine body is provided with a first inlet and a first outlet. The first inlet is provided with a cleaning unit. The cleaning unit includes a housing, a blower mechanism for removing rice husks and dust from rice, and a filter mechanism for removing sand from rice. The housing is provided with a second inlet and a second outlet. The second outlet is connected to the first inlet. The blower mechanism and the filter mechanism are respectively disposed in the housing, and the blower mechanism is located above the filter mechanism. The side wall of the housing is provided with an air vent for the blower mechanism to discharge rice husks and dust, and a pipe for the filter mechanism to discharge sand.

[0008] In the packaging machine, the cleaning unit further includes a feed pipe and a discharge pipe. One end of the feed pipe is connected to the second feed port, and the other end of the feed pipe is provided with a feed hopper. The two ends of the discharge pipe are respectively connected to the second discharge port and the first feed port.

[0009] In the packaging machine, the cleaning unit further includes a guide plate, a connecting ring, and a receiving box. One side of the guide plate is connected to the feed pipe through the connecting ring. A plurality of spaced discharge holes are arranged around the side wall of the connecting ring. The guide plate is located in the receiving box, and the guide plate is at least partially connected to the inner wall of the receiving box. Inclined plates are respectively provided on both sides of the guide plate. A discharge port is reserved between the inclined plates and the inner wall of the receiving box. The discharge port is connected to the blower mechanism.

[0010] In the packaging machine, the discharge hole is equipped with a baffle bar, which is used to buffer the speed at which the rice is guided to the inclined plate.

[0011] In the packaging machine, the blower mechanism includes a blower housing, a distribution pipe, and a fan. The blower housing is disposed on the distribution pipe and is connected to the middle part of the distribution pipe. At least one air outlet is provided on one side wall of the blower housing near the distribution pipe, and the air outlet is connected to the air inlet. The fan is disposed in the air outlet. One end of the distribution pipe is connected to the feed port, and the other end of the distribution pipe is connected to the filter mechanism.

[0012] In the packaging machine, an air guide pipe is provided on the outer wall of the air outlet, and the outer wall of the air guide pipe abuts against the inner wall of the air outlet.

[0013] In the packaging machine, the filtration mechanism includes a screening box, a screening component for screening sand, a filter pipe for discharging rice, and a sand discharge component for conveying sand. The screening component is disposed inside the screening box and divides the interior of the screening box into an upper chamber and a lower chamber. The top of the side wall of the upper chamber is provided with screening inlets, and the diversion pipe is connected to the screening inlets. The bottom of the side wall of the upper chamber is provided with a filter outlet, and the two ends of the filter pipe are connected to the filter outlet and the discharge pipe, respectively. The bottom of the lower chamber is provided with a screening outlet for discharging sand, and the screening outlet is connected to the pipe. The sand discharge component is disposed between the screening outlet and the pipe and is used to convey the sand from the screening outlet into the pipe.

[0014] In the packaging machine, the screening component includes a screening mesh, a first screening frame, a second screening frame, a screening motor, and an eccentric wheel. The screening mesh is located inside the first screening frame and is slidably connected to it. The screening mesh and the first screening frame are inclined along the direction of the filter outlet. The bottom of the screening mesh is connected to the top of the second screening frame via a spring. The first screening frame and the second screening frame are respectively connected to the inner wall of the screening box. The screening motor is connected to the side wall of the screening box. A guide hole is provided on the side wall of the first screening frame. The output end of the screening motor passes through the guide hole and is connected to the eccentric wheel for transmission. The eccentric wheel at least partially abuts against the bottom of the screening mesh.

[0015] In the packaging machine, the sand discharge assembly includes a spiral rod, a sand discharge pipe, and a sand discharge motor. The spiral rod is disposed inside the sand discharge pipe and has spiral blades. The spiral blades are slidably connected to the inner wall of the sand discharge pipe. The sand discharge motor is disposed at one end of the sand discharge pipe and is drivenly connected to the spiral rod. The other end of the sand discharge pipe is connected to the pipeline, and a sand discharge port communicating with the screening outlet is provided on the side wall of the sand discharge pipe.

[0016] The technical solution of this application also proposes a method for using a packaging machine, which is used to realize the working control of the packaging machine in the above technical solution, including the following steps:

[0017] S1. Start the feeding machine and convey the rice that needs to be cleaned into the feeding pipe. The rice is buffered by the baffle on the discharge hole of the sleeve ring and then falls onto the guide plate, so that the rice is guided into the blower mechanism by the inclined plate.

[0018] S2. Start the fan in the blower mechanism so that the fan can discharge the rice husks and dust from the rice through the air outlet on the blower casing, and guide the rice after removing the rice husks and dust into the filter mechanism through the diversion pipe.

[0019] S3. Start the screening component in the filtration mechanism to screen the rice, and then import the screened rice into the packaging machine body so that the packaging machine body can package the rice after screening the sand.

[0020] S4. Start the sand discharge component in the filtration mechanism to transport the sand screened out of the rice from the sand discharge component to the pipeline for collection and processing.

[0021] Beneficial effects: In this application, after rice is introduced into the cleaning unit through the second inlet, the rice husks and dust are first removed by a blower mechanism so that the rice husks and dust are discharged from the air vents on the side wall of the unit. Then, a filter mechanism is used to remove sand from the rice and discharge the sand from the pipe outside the unit. Thus, the cleaned rice is introduced into the first inlet from the second outlet, and then into the packaging machine body from the first inlet. The packaging machine body then discharges the cleaned rice from the first outlet for packaging. This process effectively cleans the rice husks, dust, sand, and other impurities, greatly improving the packaging quality of the rice. Attached Figure Description

[0022] Figure 1 A perspective view of the packaging machine provided by the present invention;

[0023] Figure 2 A perspective view of the cleaning unit provided by the present invention;

[0024] Figure 3 This is a partial structural schematic diagram of the cleaning unit provided by the present invention;

[0025] Figure 4 Schematic diagram of the internal structure of the cleaning unit provided by the present invention Figure 1 ;

[0026] Figure 5 Schematic diagram of the internal structure of the cleaning unit provided by the present invention Figure 2 ;

[0027] Figure 6 A partial structural schematic diagram of the screening component and sand removal component provided by the present invention;

[0028] Figure 7 for Figure 6 Enlarged view of region A in the middle;

[0029] Figure 8 A schematic diagram of the blower mechanism provided by the present invention.

[0030] Key component symbols: 1-Packaging machine body, 2-Cleaning unit, 21-Box, 211-Air outlet, 212-Pipe, 22-Blower mechanism, 221-Fan housing, 2211-Air outlet, 222-Diverter pipe, 223-Fan, 224-Air duct, 225-Bar screen, 23-Filter mechanism, 231-Screening box, 232-Screening assembly, 2321-Screening mesh, 2322-First screening frame, 23 23-Second screening frame, 2324-Screening motor, 2325-Eccentric wheel, 2326-Spring, 233-Filter tube, 234-Sand discharge assembly, 2341-Spiral rod, 23411-Spiral blade, 2342-Sand discharge pipe, 2343-Sand discharge motor, 24-Feed pipe, 25-Discharge pipe, 26-Guide plate, 261-Inclined plate, 27-Connecting ring, 28-Receiving box, 29-Baffle, 3-Support plate. Detailed Implementation

[0031] This invention provides a packaging machine and its usage method. To make the purpose, technical solution and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and should not be construed as limiting this invention; in addition, the terms "installation," "connection," etc. should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] Please see Figures 1 to 8 The present invention provides a packaging machine, which includes a packaging machine body 1. The packaging machine body 1 is provided with a first inlet and a first outlet. The first inlet is provided with a cleaning unit 2. The cleaning unit 2 includes a housing 21, a blower mechanism 22 for removing rice husks and dust from rice, and a filter mechanism 23 for removing sand from rice. The housing 21 is provided with a second inlet and a second outlet. The second outlet is connected to the first inlet. The blower mechanism 22 and the filter mechanism 23 are respectively disposed inside the housing 21, and the blower mechanism 22 is located above the filter mechanism 23. The side wall of the housing 21 is provided with an air vent 211 for the blower mechanism 22 to discharge rice husks and dust, and a pipe 212 for the filter mechanism 23 to discharge sand.

[0034] In actual use, after the rice is introduced into the housing 21 of the cleaning unit 2 through the second inlet, the rice husks and dust in the rice are first removed by the blower mechanism 22 so that the rice husks and dust are discharged from the air vents 211 on the side wall of the housing 21. Then, the sand in the rice is removed by the filter mechanism 23 and discharged from the outside of the housing 21 through the pipe 212. Thus, the cleaned rice is introduced into the first inlet from the second outlet, and then into the packaging machine body 1 from the first inlet. The packaging machine body 1 then exports the cleaned rice from the first outlet and packages it. This process cleans the rice husks, dust and sand and other impurities in the rice, greatly improving the packaging quality of the rice.

[0035] For example, such as Figure 1 As shown, the box 21 is connected to the top of the packaging machine body 1 by several support plates 3. The first feed port is located at the top of the packaging machine body 1, and the second discharge port is located at the bottom of the box 21. The box 21 is assembled on the top of the packaging machine body 1 by the support plates 3 so that the second discharge port can be connected to the first feed port.

[0036] In some embodiments, combined Figure 1 and Figure 2 It can be understood that the cleaning unit 2 also includes an inlet pipe 24 and an outlet pipe 25. One end of the inlet pipe 24 is connected to the second inlet, and the other end of the inlet pipe 24 is provided with a feeding hopper. The two ends of the outlet pipe 25 are connected to the second outlet and the first inlet, respectively. Through the guiding function of the feeding hopper on the inlet pipe 24, the rice conveyed by the feeding machine can be more easily introduced into the box 21. At the same time, through the connecting function of the outlet pipe 25, the connection between the second outlet and the first inlet is realized.

[0037] In some embodiments, such as Figure 3 As shown, the cleaning unit 2 also includes a guide plate 26, a connecting ring 27, and a receiving box 28. One side of the guide plate 26 is connected to the feed pipe 24 through the connecting ring 27. Multiple spaced discharge holes are arranged around the side wall of the connecting ring 27. The guide plate 26 is located in the receiving box 28, and at least partially connected to the inner wall of the receiving box 28. Inclined plates 261 are respectively provided on both sides of the guide plate 26. A discharge port is reserved between the inclined plates 261 and the inner wall of the receiving box 28, and the discharge port is connected to the blower mechanism 22. After rice is introduced into the feed pipe 24, it flows evenly onto the guide plate 26 through the discharge holes on the connecting ring 27. Through the guiding action of the receiving box 28 and the inclined plates 261, the rice on the guide plate 26 flows uniformly to the discharge port, facilitating the cleaning process of the rice by the blower mechanism 22.

[0038] Preferably, such as Figure 3As shown, the discharge port is equipped with a baffle 29, which is used to buffer the speed of the rice guiding the inclined plate 261, so that the rice flows more uniformly to the discharge port, thereby improving the cleaning efficiency of the blower mechanism 22 on the rice.

[0039] In some embodiments, such as Figure 8 As shown, the blower mechanism 22 includes a blower housing 221, a diversion pipe 222, and a fan 223. The blower housing 221 is disposed on the diversion pipe 222 and is connected to the middle part of the diversion pipe 222. At least one air outlet 2211 is provided on the side wall of the blower housing 221 near the diversion pipe 222. The air outlet 2211 is connected to the air inlet 211. The fan 223 is disposed in the air outlet 2211. One end of the diversion pipe 222 is connected to the feed port, and the other end of the diversion pipe 222 is connected to the filter mechanism 23. In actual operation, rice is introduced into the diversion pipe 222 from the feed port and then passes through the fan housing 221. After the fan 223 is started, the rice husks and dust in the rice are blown from the air outlet 2211 to the air vent 211 so that the rice husks and dust are discharged from the air vent 211. At the same time, the rice with the rice husks and dust removed is introduced into the filter mechanism 23 from the bottom of the diversion pipe 222, thereby realizing the cleaning treatment of rice husks and dust in the rice by the blower mechanism 22.

[0040] Preferably, such as Figure 8 As shown, baffles 225 are installed on both sides of the fan 223. The edges of the baffles 225 are connected to the inner wall of the air outlet 2211. The baffles 225 block the rice from falling into the air outlet 2211, further ensuring the normal operation of the fan 223. It should be noted that since the mass and volume of rice husks and dust are smaller than those of rice, the wind generated by the fan 223 can blow the rice husks and dust through the baffles 225 to the outside of the air outlet 2211. Therefore, the baffles 225 do not affect the discharge of rice husks and dust.

[0041] In some embodiments, such as Figure 8 As shown, an air guide pipe 224 is provided on the outer wall of the air outlet 2211. The outer wall of the air guide pipe 224 abuts against the inner wall of the air outlet 211 so that the air carrying rice husks and dust can be discharged from the box 21 through the air guide pipe 224, thereby improving the exhaust effect of the blower mechanism 22.

[0042] In some embodiments, combined Figure 4 and Figure 5It can be understood that the filtration mechanism 23 includes a screening box 231, a screening component 232 for screening sand, a filter pipe 233 for discharging rice, and a sand discharge component 234 for conveying sand. The screening component 232 is located inside the screening box 231 and divides the interior of the screening box 231 into an upper chamber and a lower chamber. The top of the side wall of the upper chamber is provided with a screening inlet, and the diversion pipe 222 is connected to the screening inlet. The bottom of one side wall of the upper chamber is provided with a filter outlet, and the two ends of the filter pipe 233 are connected to the filter outlet and the discharge pipe 25, respectively. The bottom of the lower chamber is provided with a screening outlet for discharging sand, and the screening outlet is connected to the pipe 212. The sand discharge component 234 is located between the screening outlet and the pipe 212 and is used to transport the sand from the screening outlet to the pipe 212. After removing the husks and dust, the rice is introduced into the upper chamber of the screening box 231 through the diversion pipe 222 from the screening inlet. The screening component 232 filters the sand in the rice, so that the rice after the sand is filtered is introduced into the filter outlet on the side wall of the upper chamber and guided from the filter pipe 233 to the discharge pipe 25. At the same time, the sand at the screening outlet of the lower chamber is transported to the pipe 212 through the sand discharge component 234, thereby realizing the cleaning treatment of the sand in the rice by the filtration mechanism 23.

[0043] Optionally, combined Figure 5 , Figure 6 and Figure 7It can be understood that the screening component 232 includes a screening mesh 2321, a first screening frame 2322, a second screening frame 2323, a screening motor 2324, and an eccentric wheel 2325. The screening mesh 2321 is located inside the first screening frame 2322 and is slidably connected to the first screening frame 2322. The screening mesh 2321 and the first screening frame 2322 are inclined along the direction of the filter outlet. The bottom of the screening mesh 2321 is connected to the top of the second screening frame 2323 through a spring 2326. The first screening frame 2322 and the second screening frame 2323 are respectively connected to the inner wall of the screening box 231. The screening motor 2324 is connected to the side wall of the screening box 231. A guide hole is provided on the side wall of the first screening frame 2322. The output end of the screening motor 2324 passes through the guide hole and is connected to the eccentric wheel 2325 for transmission. The eccentric wheel 2325 at least partially abuts against the bottom of the screening mesh 2321. In actual operation, the screening motor 2324 drives the eccentric wheel 2325 to rotate, so that the eccentric wheel 2325 supports the screening screen 2321 to move upward. Then, it is reset by the cooperation of the spring 2326 and the second screening frame 2323, thereby creating the effect of the screening screen 2321 vibrating up and down in the first screening frame 2322. Since the screening screen 2321 and the first screening frame 2322 are inclined along the direction of the filter outlet, the rice will move towards the direction of the filter outlet during the vibration. This allows the sand to be screened into the lower chamber by the screening screen 2321, while the rice is transported by the screening screen 2321 to the filter tube 233 of the filter outlet, thus realizing the screening component 232 to screen the sand in the rice.

[0044] Further optional, such as Figure 4 and Figure 5 As shown, the sand discharge assembly 234 includes a screw rod 2341, a sand discharge pipe 2342, and a sand discharge motor 2343. The screw rod 2341 is disposed inside the sand discharge pipe 2342, and a screw blade 23411 is provided on the screw rod 2341. The screw blade 23411 is slidably connected to the inner wall of the sand discharge pipe 2342. The sand discharge motor 2343 is disposed at one end of the sand discharge pipe 2342 and is drivenly connected to the screw rod 2341. The other end of the sand discharge pipe 2342 is connected to the pipe 212, and a sand discharge port communicating with the screening outlet is provided on the side wall of the sand discharge pipe 2342. In actual operation, the sand discharge motor 2343 drives the screw rod 2341 to rotate in the sand discharge pipe 2342, and the screw blade 23411 transports the sand falling at the sand discharge port towards the pipe 212, preventing sand from accumulating at the sand discharge port and making the sand discharge more reasonable.

[0045] The technical solution of this application also proposes a method for using a packaging machine, which is used to realize the working control of the packaging machine in the above embodiments, including the following steps:

[0046] S1. Start the feeding machine and feed the rice that needs to be cleaned into the feed pipe 24. The rice is buffered by the baffle 29 on the discharge hole of the sleeve ring 27 and then falls onto the guide plate 26, so that the rice is guided into the blower mechanism 22 by the guide action of the inclined plate 261.

[0047] S2. Start the fan 223 in the blower mechanism 22, so that the fan 223 discharges the rice husks and dust from the air outlet 2211 on the blower housing 221, and introduces the rice after removing the rice husks and dust into the filter mechanism 23 through the diversion pipe 222.

[0048] S3. Start the screening component 232 in the filtering mechanism 23 to screen the rice and import the screened rice into the packaging machine body 1 so that the packaging machine body 1 can package the rice after screening the sand.

[0049] S4. Start the sand discharge component 234 in the filter mechanism 23 so that the sand screened out of the rice is transported from the sand discharge component 234 to the pipe 212 for collection and processing.

[0050] In this embodiment, the feeding machine is a commonly used mechanical device in the prior art. The specific working principle of the feeding machine will not be described in detail here.

[0051] In summary, in this application, after the rice is introduced into the housing 21 of the cleaning unit 2 through the second inlet, the rice husks and dust in the rice are first removed by the blower mechanism 22 so that the rice husks and dust are discharged from the air vents 211 on the side wall of the housing 21. Then, the sand in the rice is removed by the filter mechanism 23 and discharged from the housing 21 through the pipe 212. Thus, the cleaned rice is introduced into the first inlet from the second outlet. After the cleaned rice is introduced into the packaging machine body 1 through the first inlet, the packaging machine body 1 discharges the cleaned rice from the first outlet and performs packaging processing. This achieves the cleaning of impurities such as rice husks, dust and sand in the rice, greatly improving the packaging quality of the rice.

[0052] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A packaging machine comprising a packaging machine body, a first infeed opening and a first outfeed opening being provided on the packaging machine body, characterized in that, The first feeding port is provided with a cleaning unit, the cleaning unit comprises a box, a blowing mechanism for removing rice husks and dust in rice and a filtering mechanism for removing sand in rice, the box is provided with a second feeding port and a second discharging port, the second discharging port is communicated with the first feeding port, the blowing mechanism and the filtering mechanism are arranged in the box respectively, and the blowing mechanism is located above the filtering mechanism, a tuyere for the blowing mechanism to discharge rice husks and dust and a pipeline for the filtering mechanism to discharge sand are arranged on the side wall of the box; The cleaning unit further comprises a guide plate and a receiving box, the guide plate is located in the receiving box, and the guide plate is at least partially connected with the inner wall of the receiving box, the two sides of the guide plate are respectively provided with inclined plates, and a discharging port is reserved between the inclined plate and the inner wall of the receiving box, and the discharging port is communicated with the blowing mechanism; The blowing mechanism comprises a fan shell, a shunt pipe and a fan, the fan shell is arranged on the shunt pipe, the fan shell is communicated with the middle part of the shunt pipe, at least one air outlet is arranged on the side wall of the shunt pipe close to the fan shell, the air outlet is communicated with the tuyere, the fan is arranged in the air outlet, one end of the shunt pipe is communicated with the discharging port, and the other end of the shunt pipe is communicated with the filtering mechanism; The filtering mechanism comprises a screening box and a screening assembly for screening sand, the screening assembly is arranged in the interior of the screening box, the screening assembly divides the interior of the screening box into an upper cavity and a lower cavity, and the bottom of one side wall of the upper cavity is provided with a filtering outlet; the screening assembly comprises a screening mesh, a first screening frame, a second screening frame, a screening motor and an eccentric wheel, the screening mesh is located in the first screening frame and is slidably connected with the first screening frame, the screening mesh and the first screening frame are arranged in an inclined manner along the direction of the filtering outlet, the bottom of the screening mesh is connected with the top of the second screening frame through a spring, and the first screening frame and the second screening frame are respectively connected with the inner wall of the screening box; the screening motor is connected with the side wall of the screening box, a guide hole is arranged on the side wall of the first screening frame, the output end of the screening motor is penetratingly connected with the eccentric wheel in a transmission mode, and the eccentric wheel is at least partially in abutment with the bottom of the screening mesh.

2. The packaging machine of claim 1, characterized in that, The cleaning unit further comprises an inlet pipe and an outlet pipe, one end of the inlet pipe is communicated with the second feeding port, the other end of the inlet pipe is provided with an inlet hopper, and the two ends of the outlet pipe are respectively communicated with the second discharging port and the first feeding port.

3. The packaging machine of claim 2, wherein, The cleaning unit further comprises a sleeve joint ring, one side of the guide plate is communicated with the inlet pipe through the sleeve joint ring, and a plurality of discharge holes are arranged on the side wall of the sleeve joint ring in a spaced manner.

4. The packaging machine of claim 3, wherein The discharge hole is provided with a blocking strip, and the blocking strip is used for buffering the speed of the rice guided to the inclined plate.

5. The packaging machine of claim 1, wherein, An air guide pipe is arranged on the outer side wall of the air outlet, and the outer wall of the air guide pipe is in abutment with the inner wall of the tuyere.

6. The packaging machine of claim 2, wherein, The filtering mechanism further comprises a filtering pipe for discharging rice and a sand discharging assembly for conveying sand, the top of the side wall of the upper cavity is respectively provided with a screening inlet, the shunt pipe communicates with the screening inlet, and two ends of the filtering pipe respectively communicate with the filtering outlet and the discharge pipe; the bottom of the lower cavity is provided with a screening outlet for discharging sand, the screening outlet communicates with the pipeline, and the sand discharging assembly is arranged between the screening outlet and the pipeline, and the sand discharging assembly is used for conveying the sand of the screening outlet into the pipeline.

7. The packaging machine of claim 6, characterized in that, The sand discharging assembly comprises a spiral rod, a sand discharging pipe and a sand discharging motor, the spiral rod is arranged in the sand discharging pipe, the spiral rod is provided with spiral blades, the spiral blades are in sliding connection with the inner wall of the sand discharging pipe, the sand discharging motor is arranged on one end of the sand discharging pipe, the sand discharging motor is in driving connection with the spiral rod, the other end of the sand discharging pipe is connected with the pipeline, and the side wall of the sand discharging pipe is provided with a sand discharging opening in communication with the screening outlet.

8. A method of using a packaging machine for implementing the operation control of the packaging machine according to any one of claims 5-7, characterized in that, The method comprises the following steps: S1, start the feeding machine, and convey the rice to be cleaned into the feeding pipe, so that the rice falls on the guide plate after being buffered by the blocking strip on the discharge hole of the sleeve joint ring, so that the rice is guided into the air blowing mechanism by the guiding effect of the inclined plate; S2, start the fan in the air blowing mechanism, so that the fan discharges the chaff and dust in the rice from the air outlet on the fan shell, and conveys the rice after removing the chaff and dust into the filtering mechanism through the shunt pipe; S3, start the screening assembly in the filtering mechanism to screen the rice, and guide the screened rice into the packaging machine body to package the screened rice; S4, start the sand discharging assembly in the filtering mechanism to convey the screened sand in the rice from the sand discharging assembly to the pipeline for collection.

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