CN115930583A - Grain drying machine and multi-point moisture detection method - Google Patents

Abstract

The invention relates to the technical field of grain processing, and discloses a grain drying machine and a multipoint moisture detection method, which comprise a processing box, wherein a drying device is installed at the lower side of the processing box, and a discharge pipe is connected to the bottom end of the processing box.

Description

Grain drying machine and multi-point moisture detection method

Technical Field

The invention belongs to the technical field of grain processing, and particularly relates to a grain drying machine and a multipoint moisture detection method.

Background

The food is basically a gramineous plant, the contained nutrients are mainly sugars and secondly protein, when the existing food is dried, the food is conveyed downwards one layer by one layer in the dryer during drying, hot drying air is introduced from the lower part of the dryer, one layer by one layer flows upwards, the hot air and the food flow in a single line, and the hot air and the food flow in a reverse direction to take away the moisture in the food for drying. In the drying process of the drying tower, along with the high lifting and the increase of the retention time of hot air in the drying tower, the humidity of the hot air is gradually increased, when the hot air flows to the upper layer of the drying tower, the water content is doubled, although the hot air still has higher temperature and can achieve the preheating effect on grains, the drying effect is very poor due to the higher water content, and particularly, the moisture content of the grains in the initial state is not particularly high, and the grains are even caused to be rewashed.

Through retrieval, a patent with the Chinese patent authorization number of CN113945080A discloses a grain dryer and a grain moisture detection method, and the grain dryer comprises a drying tower, a feeding device, a hot air system and a control system, wherein a plurality of conveying belts and inclined plates are arranged in the drying tower, the conveying belts and the inclined plates are arranged in a vertical direction in an adjacent mode, connecting grooves are formed in the upper surface of each inclined plate, receiving hoppers are arranged on the upper surfaces of the connecting grooves corresponding to the higher sides of the inclined plates, discharging openings are formed in the lower sides of the inclined plates and located in the connecting grooves, the drying tower is divided into three relatively independent parts, namely a first drying area, a second drying area and a third drying area, and dry hot air is introduced through a first air inlet pipe, a second air inlet pipe and a third air inlet pipe respectively, so that the problem that when the grain is dried by single-line flowing hot air in the existing grain drying tower is solved, the grain drying effect of the grain close to the upper side in the drying tower is poor, but the device has a large demand on the heating device, the utilization rate of the dried grain is relatively wasted, the use cost is high, and a plurality of drying fans are matched for the use, so that a drying machine and a moisture detection method is provided.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the grain dryer and the multipoint moisture detection method, and the problems are effectively solved.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a grain drier, includes the processing case, drying device is installed to the downside of processing case, the bottom of processing case is connected with the discharging pipe, the first pure cotton canvas transmission band of multiunit is evenly installed to both sides around the processing incasement wall, multiunit second pure cotton canvas transmission band is evenly installed to both sides around the processing incasement wall, the downside of first pure cotton canvas transmission band is provided with check fender device, the downside of second pure cotton canvas transmission band evenly is provided with multiunit mobile detection device, first pure cotton canvas transmission band all is the slope setting with second pure cotton canvas transmission band, the right side that check kept off the device is provided with six air vents of group.

Preferably, the check keep off the device and include two sets of first linear guide rails and flexible pipe, the right side of flexible pipe is connected with the connecting plate, both ends are connected with the removal end of two sets of first linear guide rails respectively around the connecting plate, and are two sets of the back of the body end of first linear guide rail is connected with the front and back lateral wall of processing incasement chamber respectively, both sides are connected with the front and back both sides of processing incasement wall respectively around flexible pipe.

Preferably, the mobile detection device comprises two groups of second linear guide rails, the second linear guide rails are installed at the mobile ends of the second linear guide rails, and the moisture content detection module is installed at the mobile ends of the second linear guide rails.

Preferably, six groups of air outlet fans are arranged on the right side of the blocking device and are located in the air holes, a first filter screen is arranged on the right side of each air outlet fan, four sides of the first filter screen are connected with the outer wall of the processing box, four groups of air inlet fans are arranged on the right side of the blocking device, a second filter screen is arranged on the left side of each air inlet fan, and the outer wall of the second filter screen is connected with the outer wall of the processing box.

Preferably, the telescopic pipe comprises a plurality of groups of return pipes, the left side of each return pipe is connected with a first limiting block, the right side of each return pipe is connected with a second limiting block, the front side and the rear side of each return pipe are respectively connected with a sliding block, the left side is the left side, the front side and the rear side of each return pipe are respectively connected with the front side wall and the rear side wall of the inner cavity of the processing box, the right side of each return pipe is connected with a connecting plate, the front side and the rear side of the processing box are respectively connected with a plurality of groups of sliding groove plates, and the viewing ends of the sliding groove plates are respectively provided with sliding grooves matched with the sliding blocks.

Preferably, the upside of first pure cotton canvas transmission band and second pure cotton canvas transmission band all is provided with the baffle, both sides are connected with the front and back lateral wall of processing incasement chamber respectively around the baffle, the upside of baffle is the slope setting.

Preferably, drying device includes two sets of drying fan and tuber pipe group, tuber pipe group includes horizontal pipeline of multiunit and vertical pipeline, the venthole has evenly been seted up to the outer wall of tuber pipe group, and is two sets of drying fan is connected with the left and right sides of tuber pipe group respectively, the downside in processing incasement chamber is installed to the tuber pipe group.

Preferably, the processing box comprises a stainless steel layer, a heat insulation layer is connected to the outer side of the stainless steel layer, and a waterproof layer is connected to the outer side of the heat insulation layer.

A use method of a grain dryer comprises the following steps:

grain enters the processing box from the upper side of the processing box, the grain overturns and descends in the processing box through a first pure cotton canvas transmission belt and a second pure cotton canvas transmission belt, when the grain moves in the processing box, a drying fan is started, external air is sucked and heated through two groups of drying fans and then is sent into an inner cavity of the processing box, a heater passes through the first pure cotton canvas transmission belt and the second pure cotton canvas transmission belt and then carries out drying work on the grain on the first pure cotton canvas transmission belt and the second pure cotton canvas transmission belt, each group of mobile detection devices are started, a second linear guide rail and a moisture content detection module are driven to move left and right through the second linear guide rail, the second linear guide rail is started to drive the moisture content detection module to move back and forth, air moisture in the inner cavity of the processing box is detected through the moisture content detection module, when a plurality of groups of moisture content detection modules detect that the air humidity is higher, then, a bottommost moisture content detection module is taken, a grid blocking device matched with the bottommost moisture content detection module is started, a first linear guide rail is started, a connecting plate is driven to move rightwards through the first linear guide rail, a telescopic pipe is driven to expand through the connecting plate, the telescopic pipe shields a first pure cotton canvas transmission belt on the upper side of the telescopic pipe, external air entering from the lower side is guided to move to the position near an air outlet fan, the air outlet fan is started, the external air is guided to be discharged out of an inner cavity of a processing box through the air outlet fan, an air inlet fan is started at the same time, the external air is guided to enter the processing box through the air inlet fan to blow the discharging position of the first pure cotton canvas transmission belt, the air pressure near the discharging position of the first pure cotton canvas transmission belt is enhanced, the air transmitted by a drying device is prevented from the discharging position of the first pure cotton canvas transmission belt from continuing to move upwards to influence grain on the first pure cotton canvas transmission belt on the upper side and a second pure cotton canvas transmission belt on the upper side The quality of the drying device is improved, a partial drying function is provided for the grain with wet upper part, and the dried grain is discharged through the discharge pipe.

Compared with the prior art, the invention has the beneficial effects that:

1. when the device is used, grains are overturned and landed in the processing box through the first pure cotton canvas conveying belt and the second pure cotton canvas conveying belt, when the grains move in the processing box, the grains on the first pure cotton canvas conveying belt and the second pure cotton canvas conveying belt are dried after a heater heated by the drying device passes through the first pure cotton canvas conveying belt and the second pure cotton canvas conveying belt, a plurality of groups of movable moisture content detection modules are arranged in the processing box to detect air at different positions, and further, when the air humidity is too high, the grid blocking device can be easily started to guide the humid air, so that the influence of the humid air on the processing work of the grains on the upper side in the processing box is avoided;

2. the air that guides outside through the fan that admits air gets into the processing case and accomplishes the unloading department to first pure cotton canvas transmission band and blow, strengthens near atmospheric pressure of first pure cotton canvas transmission band unloading department, avoids the air of drying device transmission to continue the quality that grain was gone up to the first pure cotton canvas transmission band that the upward movement influences the upside from the unloading department of first pure cotton canvas transmission band and upside second pure cotton canvas transmission band.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the drying apparatus according to the present invention;

FIG. 3 is a schematic view of a structure of the blocking device of the present invention;

FIG. 4 is a schematic view of a mobile detecting device according to the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 3 according to the present invention;

FIG. 6 is a schematic view of a telescopic tube according to the present invention;

FIG. 7 is a schematic view of the structure of the processing box of the present invention

In the figure: 100. a processing box; 101. a stainless steel layer; 102. a thermal insulation layer; 103. a waterproof layer; 110. a discharge pipe; 200. a drying device; 210. a drying fan; 220. a wind pipe group; 300. a first pure cotton canvas transport belt; 400. a second pure cotton canvas conveying belt; 500. a blocking device; 510. a first linear guide rail; 520. a telescopic pipe; 521. a pipe is returned; 522. a first stopper; 523. a second limiting block; 524. a slider; 530. a connecting plate; 540. a chute plate; 600. a movement detection device; 610. a second linear guide; 620. a second linear guide; 630. a moisture content detection module; 700. an air outlet fan; 710. a first filter screen; 720. an air inlet fan; 730. a second filter screen; 800. and a baffle plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to fig. 1, a grain dryer, including processing case 100, drying device 200 is installed to the downside of processing case 100, the bottom fixedly connected with discharging pipe 110 of processing case 100, the even fixed mounting in both sides has the first pure cotton canvas transmission band 300 of multiunit around the processing case 100 inner wall, the even fixed mounting in both sides has multiunit second pure cotton canvas transmission band 400 around the processing case 100 inner wall, the fixed check that is provided with of downside of first pure cotton canvas transmission band 300 keeps off device 500, the even fixed multiunit that is provided with of downside of second pure cotton canvas transmission band 400 removes detection device 600, first pure cotton canvas transmission band 300 all is the slope setting with second pure cotton canvas transmission band 400, the right side of check that keeps off device 500 is provided with six groups of air vents.

The blocking device 500 comprises two sets of first linear guide rails 510 and telescopic pipes 520, the two sets of first linear guide rails 510 are respectively installed on the front and rear side walls of the inner cavity of the processing box 100, a connecting plate 530 is fixedly connected to the right side of the telescopic pipes 520, the front and rear ends of the connecting plate 530 are respectively fixedly connected with the moving ends of the two sets of first linear guide rails 510, the back ends of the two sets of first linear guide rails 510 are respectively fixedly connected with the front and rear side walls of the inner cavity of the processing box 100, the front and rear sides of the telescopic pipes 520 are respectively fixedly connected with the front and rear sides of the inner wall of the processing box 100, the connecting plate 530 is driven to move by the arrangement of the first linear guide rails 510, the telescopic pipes 520 are unfolded or closed, moist air is guided by the telescopic pipes 520, and the moist air is prevented from influencing the grain processing quality of the upper side.

Remove detection device 600 and include two sets of second linear guide rails 610, the removal end fixed mounting of two sets of second linear guide rails 610 has second linear guide rail 620, the removal end fixed mounting of second linear guide rail 620 has moisture content detection module 630, cooperate through setting up second linear guide rail 610 and second linear guide rail 620 and can drive moisture content detection module 630 and remove, make moisture content detection module 630 detectable position change, and then can effectively detect the air of different positions in processing case 100, improve the efficiency that moisture content detection module 630 detected processing case 100, and then be convenient for this device can effectively guide moist air in the processing case 100.

Six groups of air outlet fans 700 are fixedly arranged on the right side of the blocking device 500, the air outlet fans 700 are located in the air vents, a first filter screen 710 is fixedly arranged on the right side of the air outlet fan 700, four sides of the first filter screen 710 are fixedly connected with the outer wall of the processing box 100, four groups of air inlet fans 720 are fixedly arranged on the right side of the blocking device 500, a second filter screen 730 is fixedly arranged on the left side of the air inlet fans 720, the outer wall of the second filter screen 730 is fixedly connected with the outer wall of the processing box 100, external air is guided by the air inlet fans 720 to enter the processing box 100 to blow the blanking position of the first pure cotton canvas transmission belt 300, air pressure near the blanking position of the first pure cotton canvas transmission belt 300 is enhanced, and the air transmitted by the drying device 200 is prevented from continuously moving upwards from the blanking position of the first pure cotton canvas transmission belt 300 to affect the quality of grains on the first pure cotton canvas transmission belt 300 on the upper side and the second pure cotton canvas transmission belt 400 on the upper side.

The telescopic pipe 520 comprises a plurality of groups of return pipes 521, a first limiting block 522 is fixedly connected to the left side of each return pipe 521, a second limiting block 523 is fixedly connected to the right side of each return pipe 521, sliders 524 are fixedly connected to the front side and the rear side of each return pipe 521, the front side and the rear side of the leftmost return pipe 521 are fixedly connected to the front side wall and the rear side wall of the inner cavity of the processing box 100 respectively, the right side of the rightmost return pipe 521 is fixedly connected to the connecting plate 530, a plurality of groups of sliding groove plates 540 are fixedly connected to the front side and the rear side of the processing box 100, sliding grooves matched with the sliders 524 are formed in the viewing ends of the sliding groove plates 540 on the front side and the rear side, the return pipes 521 can be supported by the sliders 524, the telescopic pipe 520 is prevented from being inclined, shaken and clamped, and limited by the second limiting block 523 and the first limiting block 522.

The upside of first pure cotton canvas transmission band 300 and second pure cotton canvas transmission band 400 all is provided with baffle 800, both sides are connected with the front and back lateral wall of processing case 100 inner chamber respectively around baffle 800, the upside of baffle 800 is the slope setting, through setting up baffle 800, can avoid grain to drop to the time of the first pure cotton canvas transmission band 300 of downside or second pure cotton canvas transmission band 400, grain drops from the junction of first pure cotton canvas transmission band 300 or second pure cotton canvas transmission band 400 and processing case 100 inner wall, avoid influencing the grain card and go into the gap between first pure cotton canvas transmission band 300 or second pure cotton canvas transmission band 400 and the processing case 100 inner wall, stability when improving this device and using.

Drying device 200 includes two sets of drying blower 210 and tuber pipe group 220, tuber pipe group 220 is installed in the outside of processing case 100, tuber pipe group 220 includes multiunit horizontal pipeline and vertical pipeline, the venthole has evenly been seted up to the outer wall of tuber pipe group 220, two sets of drying blower 210 respectively with the left and right sides fixed connection of tuber pipe group 220, tuber pipe group 220 is installed in the downside of processing case 100 inner chamber, can be with the even transport of the outside air after drying blower 210 heat drying to the downside of processing case 100 inner chamber through setting up tuber pipe group 220, make the air after the drying can be even carry out effectively drying work to the grain on first pure cotton canvas transmission band 300 and the second pure cotton canvas transmission band 400.

Processing case 100 includes stainless steel layer 101, the outside fixedly connected with insulating layer 102 of stainless steel layer 101, the outside fixedly connected with waterproof layer 103 of insulating layer 102, avoid moist grain damage processing case 100 through setting up stainless steel layer 101, avoid the dry gas discharge processing case 100 in the processing case 100 through setting up insulating layer 102, avoid the outside to have water smoke to get into processing case 100 and then influence the processing of grain in the processing case 100 through setting up waterproof layer 103, the stability when having improved this device and using.

A method for using a grain dryer, wherein grain enters the processing box 100 from the upper side of the processing box 100, the grain turns and descends in the processing box 100 through a first pure cotton canvas conveyor belt 300 and a second pure cotton canvas conveyor belt 400, when the grain moves in the processing box 100, a drying fan 210 is started, external air is sucked and heated through two groups of drying fans 210 and then sent into the inner cavity of the processing box 100, a heater passes through the first pure cotton canvas conveyor belt 300 and the second pure cotton canvas conveyor belt 400 to dry the grain on the first pure cotton canvas conveyor belt 300 and the second pure cotton canvas conveyor belt 400, each group of movement detection devices 600 are started, the second linear guide rail 620 and a moisture content detection module 630 are driven to move left and right through the second linear guide rail 610, the second linear guide rail 620 is started, the moisture content detection module 630 is driven to move back and forth through the second linear guide rail 620, the air moisture in the inner cavity of the processing box 100 is detected by the moisture content detecting module 630, when the moisture content detecting modules 630 detect high air humidity, the moisture content detecting module 630 at the bottom layer is selected, the grid blocking device 500 matched with the moisture content detecting module is started, the first linear guide rail 510 drives the connecting plate 530 to move rightwards, the connecting plate 530 drives the telescopic pipe 520 to expand, the telescopic pipe 520 shields the first pure cotton canvas conveying belt 300 at the upper side of the telescopic pipe and guides the outside air entering from the lower side to move to the vicinity of the air outlet fan 700, the air outlet fan 700 is started, the outside air is guided by the air outlet fan 700 to be discharged out of the inner cavity of the processing box 100, the air inlet fan 720 is started at the same time, the outside air is guided by the air inlet fan 720 to enter the processing box 100 to blow the discharging position of the first pure cotton canvas conveying belt 300, the first pure cotton canvas transmission band 300 unloading of reinforcing department near atmospheric pressure, the air of avoiding drying device 200 transmission continues the upward movement from the unloading department of first pure cotton canvas transmission band 300 to influence the quality of grain on the first pure cotton canvas transmission band 300 of upside and the second pure cotton canvas transmission band 400 of upside, provides partial drying function for the moist grain in upper portion simultaneously, and the grain after the drying passes through discharging pipe 110 and discharges.

It should be noted that, in this document, relational terms such as first and second, and the like are only used for distinguishing one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations, and the terms "comprise", "include", or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus, and the terms "mount", "connect", or "connect" should be broadly construed, for example, as being fixedly connected, detachably connected, or integrally connected unless expressly specified or limited otherwise; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, and the two elements may be communicated with each other, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art through specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. A grain drier which is characterized in that: including processing case (100), drying device (200) are installed to the downside of processing case (100), the bottom of processing case (100) is connected with discharging pipe (110), the first pure cotton canvas transmission band (300) of multiunit is evenly installed to both sides around processing case (100) inner wall, multiunit second pure cotton canvas transmission band (400) are evenly installed to both sides around processing case (100) inner wall, the downside of first pure cotton canvas transmission band (300) is provided with check and keeps off device (500), the downside of second pure cotton canvas transmission band (400) evenly is provided with multiunit mobile detection device (600), first pure cotton canvas transmission band (300) all is the slope setting with second pure cotton canvas transmission band (400), the right side of check fender device (500) is provided with six air vents.

2. The grain dryer of claim 1, wherein: the grid keeps off device (500) includes two sets of first linear guide rail (510) and flexible pipe (520), the right side of flexible pipe (520) is connected with connecting plate (530), both ends are connected with the removal end of two sets of first linear guide rail (510) respectively around connecting plate (530), and are two sets of the end that backs on the back of the body of first linear guide rail (510) is connected with the front and back lateral wall of processing case (100) inner chamber respectively, both sides are connected with the front and back both sides of processing case (100) inner wall respectively around flexible pipe (520).

3. The grain dryer of claim 1, wherein: remove detection device (600) and include two sets of second linear guide rail (610), two sets of second linear guide rail (620) are installed to the removal end of second linear guide rail (610), moisture content detection module (630) are installed to the removal end of second linear guide rail (620).

4. The grain dryer of claim 1, wherein: the right side of the blocking device (500) is provided with six groups of air outlet fans (700), the air outlet fans (700) are located in the air holes, the right side of the air outlet fans (700) is provided with a first filter screen (710), four sides of the first filter screen (710) are connected with the outer wall of the processing box (100), the right side of the blocking device (500) is provided with four groups of air inlet fans (720), the left side of the air inlet fans (720) is provided with a second filter screen (730), and the outer wall of the second filter screen (730) is connected with the outer wall of the processing box (100).

5. The grain dryer of claim 2, wherein: the telescopic pipe (520) comprises multiple groups of return pipes (521), the left side of the return pipes (521) is connected with a first limiting block (522), the right side of the return pipes (521) is connected with a second limiting block (523), the front side and the rear side of the return pipes (521) are connected with sliding blocks (524), the front side and the rear side of the return pipes (521) on the leftmost side are respectively connected with the front side wall and the rear side wall of the inner cavity of the processing box (100), the right side of the return pipes (521) on the rightmost side is connected with a connecting plate (530), the front side and the rear side of the processing box (100) are respectively connected with multiple groups of chute plates (540), and the viewing ends of the chute plates (540) on the front side and the rear side are respectively provided with chutes matched with the sliding blocks (524).

6. The grain dryer of claim 1, wherein: the upside of first pure cotton canvas transmission band (300) and second pure cotton canvas transmission band (400) all is provided with baffle (800), both sides are connected with the front and back lateral wall of processing case (100) inner chamber respectively around baffle (800), the upside of baffle (800) is the slope setting.

7. The grain dryer of claim 1, wherein: drying device (200) include two sets of drying blower (210) and tuber pipe group (220), tuber pipe group (220) include multiunit horizontal pipeline and vertical pipeline, the venthole has evenly been seted up to the outer wall of tuber pipe group (220), and is two sets of drying blower (210) are connected with the left and right sides of tuber pipe group (220) respectively, tuber pipe group (220) are installed in the downside of processing case (100) inner chamber.

8. The grain dryer of claim 1, wherein: the processing box (100) comprises a stainless steel layer (101), a heat insulation layer (102) is connected to the outer side of the stainless steel layer (101), and a waterproof layer (103) is connected to the outer side of the heat insulation layer (102).

9. The method of using a grain dryer of claim 1, wherein: grain enters the processing box (100) from the upper side of the processing box (100), the grain overturns and descends in the processing box (100) through a first pure cotton canvas transmission belt (300) and a second pure cotton canvas transmission belt (400), when the grain moves in the processing box (100), a drying fan (210) is started, outside air is sucked and heated through two groups of drying fans (210) and then sent into an inner cavity of the processing box (100), after being heated to pass through the first pure cotton canvas transmission belt (300) and the second pure cotton canvas transmission belt (400), the grain on the first pure cotton canvas transmission belt (300) and the second pure cotton canvas transmission belt (400) is dried, and each group of mobile detection devices (600) is started, the second linear guide rail (620) and the moisture content detection module (630) are driven to move left and right through the second linear guide rail (610), the second linear guide rail (620) is started, the moisture content detection module (630) is driven to move back and forth through the second linear guide rail (620), air moisture in the inner cavity of the processing box (100) is detected through the moisture content detection module (630), when a plurality of groups of moisture content detection modules (630) detect high air humidity, the moisture content detection module (630) at the bottommost layer is taken, the grid blocking device (500) matched with the moisture content detection module is started, the first linear guide rail (510) is started, the connecting plate (530) is driven to move right through the first linear guide rail (510), the telescopic pipe (520) is driven to be unfolded through the connecting plate (530), the telescopic pipe (520) is enabled to shield a first pure cotton canvas conveying belt (300) on the upper side of the telescopic pipe, outside air entering the lower side is guided, the telescopic pipe is enabled to move to the position near an air outlet fan (700), the air outlet fan (700) is started, the outside air is guided to be discharged out of an inner cavity of the processing box (100) through the air outlet fan (700), meanwhile, the air inlet fan (720) is started, the outside air is guided to enter the processing box (100) through the air inlet fan (720) to blow the discharging position of the first pure cotton canvas conveying belt (300), air pressure near the discharging position of the first pure cotton canvas conveying belt (300) is enhanced, air transmitted by the drying device (200) is prevented from continuously moving upwards from the discharging position of the first pure cotton canvas conveying belt (300) to affect the quality of grains on the upper side and the quality of grains on a second pure cotton canvas conveying belt (400) on the upper side, meanwhile, a partial drying function is provided for wet grains on the upper portion, and the grains after being dried are discharged through the discharge pipe (110).

Images