CN113091426A - Efficient grain drying machine capable of removing impurities - Google Patents

Efficient grain drying machine capable of removing impurities Download PDF

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Publication number
CN113091426A
CN113091426A CN202110374311.4A CN202110374311A CN113091426A CN 113091426 A CN113091426 A CN 113091426A CN 202110374311 A CN202110374311 A CN 202110374311A CN 113091426 A CN113091426 A CN 113091426A
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box body
screen
gear
wall
upper box
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CN202110374311.4A
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CN113091426B (en
Inventor
贾海军
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Yancheng Jinrui Grain Machine Co ltd
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Yancheng Jinrui Grain Machine Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/18—Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10—Temperature; Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/08—Parts thereof
    • F26B25/12—Walls or sides; Doors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/14—Chambers, containers, receptacles of simple construction
    • F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention provides a high-efficiency grain dryer capable of removing impurities, which comprises an upper box body, wherein a first screen is arranged in the upper box body, and a first opening is formed in the lower side wall of the upper box body; the lower box body is arranged at the lower end of the upper box body, a second opening is formed in the upper side wall of the lower box body, the lower box body is communicated with the upper box body through the second opening and the first opening, and a second screen is arranged in the lower box body; the impurity removing device is arranged above the first screen and used for removing impurities on the upper surface of the first screen. According to the grain drying machine, the first screen and the second screen are arranged, so that impurities mixed in grains can be screened out, the impurities are prevented from being mixed in the grains to occupy the drying capacity of the grain drying machine, after the impurities are removed from the grains, the utilization rate of the drying capacity can be improved, the grain drying machine is favorable for fast drying of the grains, the drying efficiency of the grain drying machine is improved, and meanwhile the grain drying cost is reduced.

Description

Efficient grain drying machine capable of removing impurities
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a high-efficiency grain dryer capable of removing impurities.
Background
With the continuous deepening of agricultural land circulation and the continuous expansion of novel grain production main bodies, the grain large-scale planting tends to be great. The problem of how to dehydrate the newly harvested grains is also introduced, and when the traditional agricultural production mode is changed, the problem of dehydrating the newly harvested grains by means of the traditional airing mode is unrealistic.
Therefore, a new industry is born, namely the grain drying industry. Under the encouragement and support of national policies, the grain drying industry develops rapidly in recent years, and not only grain processing enterprises but also more and more merchants find grain drying equipment in a dispute.
At present, grain drying-machine can only be used for drying grain mostly, can't get rid of the impurity in the grain, and impurity mixes and occupies grain drying-machine's capacity in grain, has reduced the stoving quantity of grain, and is unfavorable for the fast drying of grain to reduce grain drying-machine's drying efficiency, increased grain stoving cost.
Disclosure of Invention
The invention provides an efficient grain dryer capable of removing impurities, which is used for solving the technical problems that most of the existing grain dryers can only be used for drying grains and cannot remove the impurities in the grains, the impurities are mixed in the grains to occupy the capacity of the grain dryer, the grain drying quantity is reduced, the grain is not beneficial to fast drying, the grain drying efficiency is reduced, and the grain drying cost is increased.
In order to solve the technical problem, the invention discloses a high-efficiency grain dryer capable of removing impurities, which comprises:
the device comprises an upper box body, a first screen and a second screen, wherein a first opening is formed in the lower side wall of the upper box body;
the lower box body is arranged at the lower end of the upper box body, a second opening is formed in the upper side wall of the lower box body, the lower box body is communicated with the upper box body through the second opening and the first opening, and a second screen is arranged in the lower box body;
the impurity removing device is arranged above the first screen and used for removing impurities on the upper surface of the first screen.
Preferably, a hopper is arranged at the upper end of the upper box body, and the interior of the hopper is communicated with the interior of the upper box body.
Preferably, the impurity removing device includes:
the first motor is arranged inside the upper box body, the upper end of the first motor is fixedly connected with the inner wall of the upper side of the upper box body, the output end of the first motor is provided with a first rotating shaft, the first rotating shaft is respectively provided with a first gear and a second gear, the first gear is positioned above the second gear, and the first gear and the second gear are both incomplete gears;
the second rotating shaft is arranged in the upper box body, one end of the second rotating shaft is rotatably connected with the central position of the inner wall of the upper side of the upper box body, a third gear is arranged on the second rotating shaft, and the third gear is meshed with the first gear in a tooth form;
the two stirring blades are symmetrically arranged on the left side and the right side of the second rotating shaft, one side of each stirring blade, which is close to the second rotating shaft, is fixedly connected with the second rotating shaft, and the lower surfaces of the stirring blades are in contact with the upper surface of the first screen;
one end of the first rack penetrates through the left side wall of the upper box body and extends into the upper box body, the first rack is connected with the left side wall of the upper box body in a sliding mode, one side, facing the second gear, of the first rack is provided with a gear, the gear-shaped side of the first rack is meshed with the gear-shaped side of the second gear, the other end of the first rack extends to the outside of the upper box body and is provided with a baffle, and the baffle is perpendicular to the first rack and is fixedly connected with one end, far away from the second gear, of the first rack;
the sliding rod is arranged on one side, facing the upper box body, of the baffle plate, is perpendicular to the baffle plate, one end, far away from the baffle plate, of the sliding rod penetrates through the left side wall of the upper box body and extends into the upper box body, a push plate is arranged, sieve holes in the left and right directions are formed in the push plate, and the push plate is parallel to the baffle plate;
the first spring is sleeved on the sliding rod, one end of the first spring is fixedly connected with the side wall of the baffle, and the other end of the first spring is fixedly connected with the outer wall of the left side of the upper box body.
Preferably, the diameter of the screen holes in the first screen is larger than that of the screen holes in the second screen.
Preferably, the right side wall of the upper box body is provided with a collecting box, the collecting box is communicated with the inside of the upper box body through a first through hole, and the first through hole is positioned above the first screen.
Preferably, the outer side wall of the lower box body is provided with a heat-insulating layer, and the heat-insulating layer is made of heat-insulating and high-temperature-resistant materials.
Preferably, the method further comprises the following steps:
the two first grooves are symmetrically arranged on the inner walls of the left side and the right side of the lower box body, guide rods are arranged in the first grooves, and the upper ends and the lower ends of the guide rods are fixedly connected with the inner walls of the upper side and the lower side of the first grooves respectively;
the first sliding block is arranged on the guide rod and is in sliding connection with the guide rod, and the left end and the right end of the second screen are fixedly connected with the side walls of the two first sliding blocks on the left side and the right side respectively;
the second spring is sleeved on the guide rod, one end of the second spring is fixedly connected with the upper surface of the first sliding block, and the other end of the second spring is fixedly connected with the inner wall of the upper side of the first groove;
the third spring is sleeved on the guide rod, one end of the third spring is fixedly connected with the lower surface of the first sliding block, and the other end of the third spring is fixedly connected with the inner wall of the lower side of the first groove;
the two rotating rods are symmetrically arranged on the inner walls of the left side and the right side of the lower box body, the rotating rods are hinged with the inner wall of the lower box body, a mounting plate is arranged on one side, facing the second screen, of the rotating rods, a plurality of air heaters are arranged on the mounting plate, and outlet ends of the air heaters are aligned to the upper surface of the second screen;
the connecting rod, connecting rod one end with first slider is close to a second screen cloth lateral wall is articulated to be connected, the connecting rod other end with the dwang lateral wall is articulated to be connected.
Preferably, the air heater exit end still sets up first trachea, first trachea is kept away from air heater one end sets up the second trachea, the second trachea is kept away from first trachea one end is run through lateral wall extends to on the lower box down the box top sets up the third trachea, the third trachea is kept away from second trachea one end is run through go up box left side wall and extend to go up inside the box, the third trachea is located first screen cloth top, the third trachea is kept away from second trachea one end sets up the third screen cloth, the third trachea passes through the second trachea with first trachea intercommunication, first trachea sets up to the hose.
Preferably, an auxiliary device is arranged below the second screen mesh, and the auxiliary device comprises:
the second motor is arranged on the inner wall of the rear side of the lower box body, a third rotating shaft is arranged at the output end of the second motor, a fourth gear is arranged at one end, far away from the second motor, of the third rotating shaft, and the fourth gear is an incomplete gear;
the rectangular frame is arranged inside the lower box body and is positioned on the periphery of the fourth gear, second racks are arranged on the inner walls of the upper side and the lower side of the rectangular frame, and the second racks are meshed with the fourth gear in a tooth form;
the two support columns are symmetrically arranged at the left end and the right end of the rectangular frame, one end of each support column is fixedly connected with the outer wall of the rectangular frame, and the other end of each support column is provided with a second sliding block;
the sliding rail is arranged on the inner wall of the lower side of the lower box body, and the second sliding block is connected with the sliding rail in a sliding manner;
the sleeves are arranged on the upper surface of the rectangular frame, sliding columns are connected in the sleeves in a sliding mode, bristles are arranged at one ends, close to the second screen, of the sliding columns, the bristles are in contact with the lower surface of the second screen, fourth springs are arranged at the ends, far away from the bristles, of the sliding columns, one ends of the fourth springs are fixedly connected with the lower ends of the sliding columns, and the other ends of the fourth springs are fixedly connected with the upper surface of the rectangular frame;
the cam is arranged on the third rotating shaft and located between the second motor and the fourth gear, and the protruding end of the cam can be in contact with the lower surface of the second screen.
Preferably, the device further comprises an alarm device, wherein the alarm device comprises:
the first temperature detection device is arranged on the outer wall of the upper box body and used for detecting the ambient temperature outside the upper box body;
the second temperature detection device is arranged on the outer wall of the lower box body and used for detecting the temperature of the outer wall of the lower box body;
the third temperature detection device is arranged at the outlet end of the air heater and is used for detecting the temperature at the outlet end of the air heater;
the moisture tester is arranged inside the lower box body and used for detecting the moisture content of the grains to be dried on the second screen;
the flow velocity sensor is arranged at the outlet end of the air heater and used for detecting the flow velocity of hot air at the outlet end of the air heater;
the timer is arranged on the outer wall of the upper box body and used for recording the working time length of the air heater when the air heater is closed;
the alarm is arranged at the upper end of the upper box body;
the controller is arranged on the outer wall of the upper box body and is electrically connected with the first temperature detection device, the second temperature detection device, the third temperature detection device, the flow velocity sensor of the moisture tester, the timer and the alarm respectively;
the controller is based on first temperature-detecting device, second temperature-detecting device, third temperature-detecting device, moisture tester, flow rate sensor reaches the time-recorder control the alarm work, includes following step:
step 1: when the moisture content of the grain to be dried on the second screen mesh detected by the moisture tester is lower than a preset moisture content, the controller controls the timer and the air heater to be closed, the timer records the working time of the air heater when the air heater is closed, and at the moment, based on the detection values of the first temperature detection device, the second temperature detection device, the third temperature detection device and the timer, the heat loss of the air heater in the working time of the air heater recorded by the timer is calculated through a formula (1):
Figure BDA0003010553600000051
wherein Q is1For the heat loss, δ, of the air heater over the period of time the air heater was operating as recorded by the timer1Is the heat transfer coefficient of the side wall of the lower box body,
Figure BDA0003010553600000062
is the thermal conductivity of the material of the lower tank side wall, a1Is the thickness, σ, of the side wall of the lower box1Is the convective heat transfer coefficient, S, of the side wall of the lower box1Is the total area of the outer surface of the lower case, T3The temperature T of the outlet end of the air heater detected by the third temperature detection device2The temperature T of the outer wall of the lower box body detected by the second temperature detection device1For the first temperature detection deviceSetting the detected ambient temperature outside the upper box body, tjThe working time length when the air heater is closed is recorded by the timer, and ln is a natural logarithm;
step 2: calculating the actual energy utilization rate of the air heater through a formula (2) based on the detection values of the flow rate sensor and the timer:
Figure BDA0003010553600000061
wherein eta is1Is the actual energy utilization rate of the air heater, C1Is the specific heat capacity, rho, of the hot air generated by the air heater1Density, v, of hot air generated by said air heater1The flow velocity of the hot air at the outlet end of the air heater detected by the flow velocity sensor, S2The cross section area of the outlet end of the air heater;
and step 3: the controller compares the actual energy utilization rate of the air heater with the preset energy utilization rate of the air heater, and when the actual energy utilization rate of the air heater is smaller than the preset energy utilization rate of the air heater, the controller controls the alarm to send an alarm prompt.
The technical scheme of the invention has the following advantages: the invention provides a high-efficiency grain dryer capable of removing impurities, which comprises an upper box body, wherein a first screen is arranged in the upper box body, and a first opening is formed in the lower side wall of the upper box body; the lower box body is arranged at the lower end of the upper box body, a second opening is formed in the upper side wall of the lower box body, the lower box body is communicated with the upper box body through the second opening and the first opening, and a second screen is arranged in the lower box body; the impurity removing device is arranged above the first screen and used for removing impurities on the upper surface of the first screen. According to the grain drying machine, the first screen and the second screen are arranged, so that impurities mixed in grains can be screened out, the impurities are prevented from being mixed in the grains to occupy the drying capacity of the grain drying machine, after the impurities are removed from the grains, the utilization rate of the drying capacity can be improved, the grain drying machine is favorable for fast drying of the grains, the drying efficiency of the grain drying machine is improved, and meanwhile the grain drying cost is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the apparatus particularly pointed out in the written description and drawings thereof.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
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 view of the overall structure of an efficient impurity-removing grain dryer according to the present invention;
FIG. 2 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 3 is an enlarged view of the invention at B of FIG. 1;
FIG. 4 is a top plan view of the upper housing of the present invention;
FIG. 5 is a right side view of the lower housing of the present invention.
In the figure: 1. an upper box body; 2. a first screen; 3. a first opening; 4. a lower box body; 5. a second opening; 6. a second screen; 7. a hopper; 8. a first motor; 9. a first rotating shaft; 10. a first gear; 11. a second gear; 12. a second rotating shaft; 13. a third gear; 14. a stirring blade; 15. a first rack; 16. a baffle plate; 17. a slide bar; 18. pushing the plate; 19. a first spring; 20. a collection box; 21. a first through hole; 22. a heat-insulating layer; 23. a first groove; 24. a guide bar; 25. a first slider; 26. a second spring; 27. a third spring; 28. rotating the rod; 29. mounting a plate; 30. a hot air blower; 31. a connecting rod; 32. a first air pipe; 33. a second air pipe; 34. a third air pipe; 35. a third screen; 36. a second motor; 37. a third rotating shaft; 38. a fourth gear; 39. a rectangular frame; 40. a second rack; 41. a support pillar; 42. a second slider; 43. a slide rail; 44. a sleeve; 45. a traveler; 46. brushing; 47. a fourth spring; 48. a cam.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.
Example 1:
an embodiment of the present invention provides a high-efficiency grain dryer capable of removing impurities, as shown in fig. 1 to 5, including:
the device comprises an upper box body 1, wherein a first screen 2 is arranged in the upper box body 1, and a first opening 3 is formed in the lower side wall of the upper box body 1;
the lower box body 4 is arranged at the lower end of the upper box body 1, a second opening 5 is formed in the upper side wall of the lower box body 4, the lower box body 4 is communicated with the upper box body 1 through the second opening 5 and the first opening 3, and a second screen 6 is arranged in the lower box body 4;
the impurity removing device is arranged above the first screen 2 and used for removing impurities on the upper surface of the first screen 2.
The working principle and the beneficial effects of the technical scheme are as follows: the invention provides a high-efficiency grain dryer capable of removing impurities, which comprises an upper box body 1 and a lower box body 4, wherein the upper box body 1 is communicated with the lower box body 4 through a first opening 3 and a second opening 5, a first screen 2 is arranged in the upper box body 1, a second screen 6 is arranged in the lower box body 4, grains to be dried are firstly put into the upper box body 1 from the upper part of the upper box body 1, then the grains to be dried pass through the first screen 2 and fall into the lower box body 4, large-volume impurities mixed in the grains to be dried are remained on the upper surface of the first screen 2, then the impurities on the upper surface of the first screen 2 are removed through an impurity removing device, the grains to be dried falling into the lower box body 4 fall onto the second screen 6, small-volume impurities pass through the second screen 6 and fall onto the bottom of the lower box body 4, and the grains to be dried are dried by a drying device in the lower box body 4, after impurity gets rid of, the lower box 4 internal drying region only can be treated the stoving grain, and can not be doped with impurity, the utilization ratio of stoving capacity has been improved greatly, through setting up first screen cloth 2 and second screen cloth 6, can screen the impurity of mixing in grain, avoid impurity to mix and occupy the stoving capacity of grain drying-machine in grain, after impurity was got rid of to grain, can improve the utilization ratio of stoving capacity, be favorable to the fast drying of grain, the drying efficiency of grain drying-machine has been improved, reduce grain stoving cost simultaneously.
Example 2
In addition to the above embodiment 1, as shown in fig. 1, a hopper 7 is provided at the upper end of the upper case 1, and the inside of the hopper 7 communicates with the inside of the upper case 1.
The working principle and the beneficial effects of the technical scheme are as follows: be provided with hopper 7 in last box 1 upper end, hopper 7 inside and the inside intercommunication of last box 1 are convenient for carry the grain of treating the stoving for last box 1 through hopper 7.
Example 3
On the basis of embodiment 1 or 2, as shown in fig. 1, 2 and 4, the impurity removing device comprises:
the first motor 8 is arranged inside the upper box body 1, the upper end of the first motor 8 is fixedly connected with the inner wall of the upper side of the upper box body 1, the output end of the first motor 8 is provided with a first rotating shaft 9, the first rotating shaft 9 is respectively provided with a first gear 10 and a second gear 11, the first gear 10 is positioned above the second gear 11, and the first gear 10 and the second gear 11 are both incomplete gears;
the second rotating shaft 12 is arranged inside the upper box body 1, one end of the second rotating shaft 12 is rotatably connected with the central position of the inner wall of the upper side of the upper box body 1, a third gear 13 is arranged on the second rotating shaft 12, and the third gear 13 is meshed with the first gear 10 in a tooth form;
the two stirring blades 14 are symmetrically arranged on the left side and the right side of the second rotating shaft 12, one side, close to the second rotating shaft 12, of each stirring blade 14 is fixedly connected with the second rotating shaft 12, and the lower surfaces of the stirring blades 14 are in contact with the upper surface of the first screen 2;
one end of the first rack 15 penetrates through the left side wall of the upper box body 1 and extends into the upper box body 1, the first rack 15 is connected with the left side wall of the upper box body 1 in a sliding mode, the first rack 15 has a toothed side facing one side of the second gear 11, the toothed side of the first rack 15 is meshed with the toothed side of the second gear 11, the other end of the first rack 15 extends to the outside of the upper box body 1 and is provided with a baffle 16, and the baffle 16 is perpendicular to the first rack 15 and is fixedly connected with one end, far away from the second gear 11, of the first rack 15;
the sliding rod 17 is arranged on one side, facing the upper box body 1, of the baffle plate 16, the sliding rod 17 is perpendicular to the baffle plate 16, one end, far away from the baffle plate 16, of the sliding rod 17 penetrates through the left side wall of the upper box body 1 and extends into the upper box body 1, a push plate 18 is arranged, a sieve hole in the left-right direction is formed in the push plate 18, and the push plate 18 is parallel to the baffle plate 16;
the first spring 19, the first spring 19 cover is established on the slide bar 17, first spring 19 one end with 16 lateral walls fixed connection of baffle, the first spring 19 other end with go up 1 left side outer wall fixed connection of box.
The working principle and the beneficial effects of the technical scheme are as follows: a first motor 8 is arranged in the upper box body 1, the first motor 8 can drive a first rotating shaft 9 to rotate, the first rotating shaft 9 can drive a first gear 10 and a second gear 11 to rotate, the first gear 10 and the second gear 11 are both incomplete gears, the first gear 10 can be intermittently meshed with a third gear 13 when rotating, the second gear 11 can be intermittently meshed with a first rack 15 when rotating, when the first gear 10 is meshed with the third gear 13, the second gear 11 is meshed with the first rack 15, the first gear 10 rotates to drive the third gear 13 to rotate, the third gear 13 rotates to drive a second rotating shaft 12 to rotate, the second rotating shaft 12 rotates to drive a stirring blade 14 to rotate, the stirring blade 14 can stir grains to be dried on the upper surface of the first screen 2 when rotating, so that the grains to be dried can rapidly pass through the first screen 2, and the conveying speed of the grains to be dried is improved, meanwhile, the stirring blade 14 can collect the large-volume impurities left on the upper surface of the first screen 2 on one side of the stirring blade 14, after the first gear 10 and the third gear 13 are engaged, the second gear 11 starts to be engaged with the first rack 15, the second gear 11 rotates to drive the first rack 15 to move towards the direction of the second rotating shaft 12, the first rack 15 drives the baffle 16 to move towards the direction close to the side wall of the upper box 1, then the baffle 16 drives the push plate 18 to slide on the upper surface of the first screen 2 through the sliding rod 17, the first spring 19 contracts, meanwhile, the side wall of the push plate 18 can also be used for attaching to the side wall of the stirring blade 14, so that the large-volume impurities collected by the stirring blade 14 are uniformly pushed to the right side of the upper box 1, the first screen 2 is prevented from being blocked by the large-volume impurities, after the second gear 11 and the first rack 15 are engaged, the push plate 18 returns to the original position under the action of, first gear 10 meshes with third gear 13 again, so cyclic motion, through being provided with the impurity removal device, can get rid of the impurity of first screen cloth 2 upper surface, make impurity collect supreme box 1 right side in unison, avoid impurity to block up first screen cloth 2, and, can shakeout the grain of waiting to dry that falls into on first screen cloth 2, accelerate the speed of waiting to dry the grain through first screen cloth 2, improve the material loading speed, make the grain volume of waiting to dry in the lower box 4 arrive the stoving capacity fast, thereby further improved drying efficiency.
Example 4
On the basis of any of the embodiments 1 to 3, the diameter of the opening in the first screen 2 is larger than the diameter of the opening in the second screen 6.
The working principle and the beneficial effects of the technical scheme are as follows: the sieve mesh diameter in the first screen cloth 2 is greater than the sieve mesh diameter in the second screen cloth 6, and the sieve mesh diameter of first screen cloth 2 is greater than the maximum length of waiting to dry grain, is convenient for wait to dry grain's the passing through, and the sieve mesh diameter of second screen cloth 6 is less than the minimum length of waiting to dry grain, prevents to wait to dry grain and drops to 4 bottoms of lower box from the sieve mesh of second screen cloth 6.
Example 5
On the basis of any one of embodiments 1 to 4, as shown in fig. 1, the right side wall of the upper box 1 is provided with a collecting box 20, the collecting box 20 is communicated with the inside of the upper box 1 through a first through hole 21, and the first through hole 21 is positioned above the first screen 2.
The working principle and the beneficial effects of the technical scheme are as follows: a collecting box 20 is arranged on the right side wall of the upper box body 1, the collecting box 20 is communicated with the inside of the upper box body 1 through a first through hole 21, the impurity removing device can push impurities on the upper surface of the first screen 2 into the collecting box 20, and the collecting box 20 collects the impurities.
Example 6
On the basis of any one of embodiments 1 to 5, as shown in fig. 1, an insulating layer 22 is arranged on the outer side wall of the lower box 4, and the insulating layer 22 is made of an insulating high-temperature-resistant material.
The working principle and the beneficial effects of the technical scheme are as follows: the outer side wall of the lower box body 4 is also provided with a heat preservation layer 22, the heat preservation layer 22 is made of heat preservation high-temperature-resistant materials, the heat preservation effect can be achieved for the lower box body 4, heat loss in the lower box body 4 is prevented, heat energy is saved, and drying cost is reduced.
Example 7
On the basis of any one of embodiments 1 to 6, as shown in fig. 1 and 5, the method further includes:
the two first grooves 23 are symmetrically arranged on the inner walls of the left side and the right side of the lower box body 4, guide rods 24 are arranged in the first grooves 23, and the upper ends and the lower ends of the guide rods 24 are fixedly connected with the inner walls of the upper side and the lower side of the first grooves 23 respectively;
the first sliding block 25 is arranged on the guide rod 24, the first sliding block 25 is connected with the guide rod 24 in a sliding mode, and the left end and the right end of the second screen 6 are fixedly connected with the side walls of the two first sliding blocks 25 on the left side and the right side respectively;
the second spring 26 is sleeved on the guide rod 24, one end of the second spring 26 is fixedly connected with the upper surface of the first sliding block 25, and the other end of the second spring 26 is fixedly connected with the inner wall of the upper side of the first groove 23;
the third spring 27 is sleeved on the guide rod 24, one end of the third spring 27 is fixedly connected with the lower surface of the first sliding block 25, and the other end of the third spring 27 is fixedly connected with the inner wall of the lower side of the first groove 23;
the two rotating rods 28 are symmetrically arranged on the inner walls of the left side and the right side of the lower box body 4, the rotating rods 28 are hinged with the inner wall of the lower box body 4, a mounting plate 29 is arranged on one side, facing the second screen 6, of the rotating rods 28, a plurality of air heaters 30 are arranged on the mounting plate 29, and the outlet ends of the air heaters 30 are aligned to the upper surface of the second screen 6;
one end of the connecting rod 31 is hinged with one side wall of the first sliding block 25 close to the second screen 6, and the other end of the connecting rod 31 is hinged with the side wall of the rotating rod 28;
the outlet end of the hot air blower 30 is further provided with a first air pipe 32, the first air pipe 32 is far away from one end of the hot air blower 30 and is provided with a second air pipe 33, the second air pipe 33 is far away from one end of the first air pipe 32 is penetrated through the upper side wall of the lower box body 4 and extends to the upper side wall of the lower box body 4 and is provided with a third air pipe 34, one end of the second air pipe 33 is penetrated through the left side wall of the upper box body 1 and extends to the inner part of the upper box body 1, the third air pipe 34 is positioned above the first screen 2, one end of the second air pipe 33 is far away from the third air pipe 34 and is provided with a third screen 35, the third air pipe 34 is communicated with the first air pipe 32 through the second air pipe 33, and the first air pipe 32 is.
The working principle and the beneficial effects of the technical scheme are as follows: the inner walls of the left side and the right side of the lower box body 4 are symmetrically provided with first grooves 23, guide rods 24 are arranged in the first grooves 23, the guide rods 24 are connected with first sliding blocks 25 in a sliding manner, the two sliding blocks are respectively fixedly connected with the two ends of the second screen 6, when grains to be dried fall on the second screen 6, the second screen 6 can sink due to the action of gravity, at the moment, the second spring 26 and the third spring 27 can buffer the second screen 6 at the same time, the overlarge impact force on the second screen 6 is avoided, the service life of the second screen 6 is prolonged, when the grains to be dried fall on the second screen 6, the second screen 6 can vibrate up and down, the purpose of turning the grains to be dried on the upper surface of the second screen 6 is achieved, the rotating rod 28 is provided with a mounting plate 29 towards one end of the second screen 6, the mounting plate 29 is provided with a plurality of hot air blowers 30, the outlet ends of the hot air blowers 30 are aligned with the upper, air heater 30 is current device, air heater 30 can produce hot-blastly, and blow hot-blastly to second screen cloth 6 upper surface, thereby to treat that the grain of drying is dried, along with the stirring of the grain of drying, can increase the heated area of the grain of drying, be convenient for fast drying, when the grain of drying on the second screen cloth 6 is gradual crescent many, second screen cloth 6 downstream, second screen cloth 6 drives first slider 25 downstream, first slider 25 drives connecting rod 31 downstream, connecting rod 31 drives dwang 28 and rotates, dwang 28 drives air heater 30 and rotates, thereby the hot-blastly angle of air heater 30 to second screen cloth 6 has been changed, make more grain of drying on the second screen cloth 6 be heated, further accelerated grain drying rate.
Example 8
On the basis of embodiment 7, as shown in fig. 1, a first air pipe 32 is further disposed at an outlet end of the hot air blower 30, a second air pipe 33 is disposed at an end of the first air pipe 32 away from the hot air blower 30, an end of the second air pipe 33 away from the first air pipe 32 penetrates through the upper sidewall of the lower box 4 and extends to above the lower box 4, and a third air pipe 34 is disposed, an end of the third air pipe 34 away from the second air pipe 33 penetrates through the left sidewall of the upper box 1 and extends into the upper box 1, the third air pipe 34 is located above the first screen 2, a third screen 35 is disposed at an end of the third air pipe 34 away from the second air pipe 33, the third air pipe 34 is communicated with the first air pipe 32 through the second air pipe 33, and the first air pipe 32 is a flexible pipe.
The working principle and the beneficial effects of the technical scheme are as follows: still be connected with first trachea 32 on air heater 30, the hot-blast of air heater 30 production can pass through first trachea 32, second trachea 33, inside third trachea 34 gets into box 1, and blow the impurity of first screen cloth 2 upper surface, thereby cooperation impurity removal device is unified to be cleared up to collecting box 20 inside with the impurity of first screen cloth 2 upper surface, help the comprehensive collection of first screen cloth 2 upper surface impurity, and simultaneously, hot-blast can preheat the grain of waiting to dry through first screen cloth 2, help the fast drying of the grain of waiting to dry.
Example 9
On the basis of any one of embodiments 1 to 7, as shown in fig. 1, 2 and 5, an auxiliary device is arranged below the second screen 6, and the auxiliary device comprises:
the second motor 36 is arranged on the inner wall of the rear side of the lower box body 4, a third rotating shaft 37 is arranged at the output end of the second motor 36, a fourth gear 38 is arranged at one end, far away from the second motor 36, of the third rotating shaft 37, and the fourth gear 38 is an incomplete gear;
the rectangular frame 39 is arranged inside the lower box body 4, the rectangular frame 39 is positioned on the periphery of the fourth gear 38, the inner walls of the upper side and the lower side of the rectangular frame 39 are provided with second racks 40, and the second racks 40 are meshed with the fourth gear 38 in a tooth form;
the two supporting columns 41 are symmetrically arranged at the left end and the right end of the rectangular frame 39, one end of each supporting column 41 is fixedly connected with the outer wall of the rectangular frame 39, and the other end of each supporting column 41 is provided with a second sliding block 42;
the slide rail 43 is arranged on the inner wall of the lower side of the lower box body 4, and the second slide block 42 is connected with the slide rail 43 in a sliding manner;
a plurality of sleeves 44, the plurality of sleeves 44 are arranged on the upper surface of the rectangular frame 39, a sliding column 45 is connected in the sleeves 44 in a sliding manner, bristles 46 are arranged at one end, close to the second screen 6, of the sliding column 45, the bristles 46 are in contact with the lower surface of the second screen 6, a fourth spring 47 is arranged at one end, far away from the bristles 46, of the sliding column 45, one end of the fourth spring 47 is fixedly connected with the lower end of the sliding column 45, and the other end of the fourth spring 47 is fixedly connected with the upper surface of the rectangular frame 39;
a cam 48, wherein the cam 48 is disposed on the third rotating shaft 37, the cam 48 is located between the second motor 36 and the fourth gear 38, and a convex end of the cam 48 can contact with a lower surface of the second screen 6.
The working principle and the beneficial effects of the technical scheme are as follows: an auxiliary device is arranged in the lower box body 4, the auxiliary device comprises a second motor 36, when the grain is dried, the second motor 36 is started, the second motor 36 rotates to drive a third rotating shaft 37 to rotate, a fourth gear 38 which is rotationally driven by the third rotating shaft 37 rotates, a rectangular frame 39 is arranged on the periphery of the fourth gear 38, the fourth gear 38 is an incomplete gear, second racks 40 are respectively arranged on the upper and lower inner walls of the rectangular frame 39, the fourth gear 38 can be respectively meshed with the second racks 40 on the upper and lower sides when rotating, two support columns 41 are symmetrically arranged at the bottom of the rectangular frame 39, a second sliding block 42 is arranged at the lower end of each support column 41, the second sliding block 42 is in sliding connection with a sliding rail 43 arranged on the lower inner wall of the lower box body 4, therefore, when the fourth gear 38 rotates, the rectangular frame 39 can be driven to do left-right reciprocating motion, a sliding column 45 is connected in the sleeve 44 in a sliding manner, a fourth spring 47 is arranged at the lower end of the sliding column 45, bristles 46 are arranged at the upper end of the sliding column 45, the bristles 46 are in contact with the lower surface of the second screen 6, when the sleeve 44 reciprocates left and right, the bristles 46 slide left and right on the lower surface of the second screen 6, the cam 48 rotates along with the third rotating shaft 37 when the third rotating shaft 37 rotates, the cam 48 rotates to drive the second screen 6 to reciprocate up and down along the inner wall of the lower box 4, through arranging an auxiliary device, impurities adhered on the second screen 6 can be clear by utilizing the left and right sliding of the bristles 46 on the lower surface of the second screen 6, the second screen 6 is prevented from being blocked, meanwhile, the cam 48 of the auxiliary device rotates to drive the second screen 6 to reciprocate up and down, the second screen 6 drives the first slide block 25 to reciprocate up and down, the first slide block 25 drives the rotating rod 28 to reciprocate by taking the, thereby make air heater 30 constantly change with the contained angle of second screen cloth 6 upper surface for the hot-blast area of air heater 30 has been increased, make the grain of treating of second screen cloth 6 upper surface be heated more evenly, simultaneously, second screen cloth 6 carries out up-and-down reciprocating motion under the effect of cam 48, more helps treating turning of drying grain, also helps impurity to pass through second screen cloth 6, thereby has improved grain drying machine's drying efficiency greatly.
Example 10
On the basis of any one of embodiments 1 to 7 and 9, the portable terminal further includes an alarm device, and the alarm device includes:
the first temperature detection device is arranged on the outer wall of the upper box body 1 and used for detecting the ambient temperature outside the upper box body 1;
the second temperature detection device is arranged on the outer wall of the lower box body 4 and used for detecting the temperature of the outer wall of the lower box body 4;
the third temperature detection device is arranged at the outlet end of the hot air blower 30 and is used for detecting the temperature of the outlet end of the hot air blower 30;
the moisture tester is arranged inside the lower box body 4 and is used for detecting the moisture content of the grain to be dried on the second screen 6;
the flow velocity sensor is arranged at the outlet end of the hot air blower 30 and used for detecting the flow velocity of hot air at the outlet end of the hot air blower 30;
the timer is arranged on the outer wall of the upper box body 1 and used for recording the working time length when the air heater 30 is closed;
the alarm is arranged at the upper end of the upper box body 1;
the controller is arranged on the outer wall of the upper box body 1 and is electrically connected with the first temperature detection device, the second temperature detection device, the third temperature detection device, the flow velocity sensor of the moisture tester, the timer and the alarm respectively;
the controller is based on first temperature-detecting device, second temperature-detecting device, third temperature-detecting device, moisture tester, flow rate sensor reaches the time-recorder control the alarm work, includes following step:
step 1: when the moisture content of the grain to be dried on the second screen 6 detected by the moisture tester is lower than a preset moisture content, the controller controls the timer and the hot air blower 30 to be closed, the timer records the working time of the hot air blower 30 when the hot air blower 30 is closed, and at this time, based on the detection values of the first temperature detection device, the second temperature detection device, the third temperature detection device and the timer, the heat loss of the hot air blower 30 in the working time of the hot air blower 30 recorded by the timer is calculated through a formula (1):
Figure BDA0003010553600000171
wherein Q is1For the heat loss, δ, of the air heater 30 over the operating time of the air heater 30 recorded by the timer1As a heat transfer coefficient of the side wall of the lower case 4,
Figure BDA0003010553600000173
is the thermal conductivity of the material of the side wall of the lower casing 4, a1Is the thickness, σ, of the side wall of the lower box 41Is the convective heat transfer coefficient, S, of the side wall of the lower box body 41Is the total area of the outer surface of the lower box 4, T3The temperature, T, of the outlet end of the air heater 30 detected by the third temperature detecting means2The temperature T of the outer wall of the lower box body 4 detected by the second temperature detection device1The upper box body detected by the first temperature detection device1 ambient temperature outside, tjThe working time length when the air heater 30 is closed is recorded by the timer, and ln is a natural logarithm;
step 2: based on the detected values of the flow rate sensor and the timer, the actual energy utilization rate of the air heater 30 is calculated by formula (2):
Figure BDA0003010553600000181
wherein eta is1Is the actual energy utilization rate, C, of the air heater 301Is the specific heat capacity, rho, of the hot air generated by the air heater 301Density, v, of the hot air generated by the hot air blower 301The flow velocity of the hot air at the outlet end of the air heater 30, S, detected by the flow velocity sensor2The cross-sectional area of the outlet end of the air heater 30;
and step 3: the controller compares the actual energy utilization rate of the air heater 30 with the preset energy utilization rate of the air heater 30, and when the actual energy utilization rate of the air heater 30 is smaller than the preset energy utilization rate of the air heater 30, the controller controls the alarm to send out an alarm prompt.
The working principle and the beneficial effects of the technical scheme are as follows: the grain dryer is also provided with an alarm device, the alarm device can detect the temperature outside the upper box body 1 through a first temperature detection device, then the temperature of the outer wall of the lower box body 4 is detected through a second temperature detection device, the temperature of the outlet end of the hot air blower 30 is detected through a third temperature detection device, when the grain dryer starts to work, the hot air blower 30 is started, the hot air blower 30 starts to work, hot air generated by the hot air blower 30 is blown to the upper surface of the second screen 6 through the outlet end of the hot air blower 30, at the moment, the timer and the moisture tester also start to work, the moisture tester can quickly measure the moisture content of grain to be dried on the upper surface of the second screen 6, when the moisture content detected by the moisture tester is lower than the preset moisture content, the grain is dried, at the moment, the controller can control the timer and the hot air blower 30 to stop working, the timer records the working time length from the beginning to the stopping, then based on the above detection values, the heat loss of the air heater 30 in the working period of the air heater 30 in the process of blowing hot air into the lower box 4 by the air heater 30 can be calculated by the formula (1), and the heat loss of the air heater 30 is related to the heat absorbed by the lower box 4, therefore, the heat conductivity coefficient and the heat transfer coefficient of the side wall of the lower box 4 are comprehensively considered in the calculation process, and the heat loss of the air heater 30 in the working period recorded by the timer is calculated by the formula (1) because the hot air generated by the air heater 30 circularly flows in the lower box 4 and the heat convection coefficient of the side wall of the lower box 4 is comprehensively considered, then the actual energy utilization rate of the air heater 30 is calculated by the formula (2), and the total energy generated by the air heater 30 is calculated according to the flow rate of the hot air detected by the flow rate sensor and the working period of the air heater 30 recorded by the timer in the calculation process, then calculating the actual energy utilization rate, finally, the controller can compare the actual energy utilization rate of the hot air blower 30 with the preset energy utilization rate of the hot air blower 30 prestored in the controller, when the actual energy utilization rate of the air heater 30 is lower than the preset energy utilization rate of the air heater 30, the controller can control the alarm to give an alarm prompt, at the moment, a worker can overhaul the air heater 30 in time according to the alarm prompt, the existing grain dryer can only overhaul the air heater 30 after the air heater 30 is damaged, therefore, the invention provides the alarm device, which can judge the state of the hot air blower 30 according to the actual energy utilization rate of the hot air blower 30, remind the worker to overhaul the hot air blower 30 in time, thereby ensuring the working efficiency of the air heater 30, improving the energy utilization rate of the air heater 30, improving the drying efficiency and achieving the purpose of energy conservation.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. The utility model provides a but impurity removal grain drying-machine of efficient which characterized in that includes:
the screen mesh type screen mesh device comprises an upper box body (1), wherein a first screen mesh (2) is arranged in the upper box body (1), and a first opening (3) is formed in the lower side wall of the upper box body (1);
the lower box body (4) is arranged at the lower end of the upper box body (1), a second opening (5) is formed in the side wall of the lower box body (4), the lower box body (4) is communicated with the upper box body (1) through the second opening (5) and the first opening (3), and a second screen (6) is arranged in the lower box body (4);
the impurity removing device is arranged above the first screen (2) and is used for removing impurities on the upper surface of the first screen (2).
2. The efficient grain dryer capable of removing impurities as claimed in claim 1, wherein a hopper (7) is provided at an upper end of the upper cabinet (1), and an inside of the hopper (7) is communicated with an inside of the upper cabinet (1).
3. The efficient impurity-removable grain dryer of claim 1, wherein said impurity removing means comprises:
the first motor (8) is arranged inside the upper box body (1), the upper end of the first motor (8) is fixedly connected with the inner wall of the upper side of the upper box body (1), the output end of the first motor (8) is provided with a first rotating shaft (9), the first rotating shaft (9) is respectively provided with a first gear (10) and a second gear (11), the first gear (10) is positioned above the second gear (11), and the first gear (10) and the second gear (11) are both incomplete gears;
the second rotating shaft (12) is arranged inside the upper box body (1), one end of the second rotating shaft (12) is rotatably connected with the central position of the inner wall of the upper side of the upper box body (1), a third gear (13) is arranged on the second rotating shaft (12), and the third gear (13) is meshed with the first gear (10) in a tooth form;
the two stirring blades (14) are symmetrically arranged on the left side and the right side of the second rotating shaft (12), one side, close to the second rotating shaft (12), of each stirring blade (14) is fixedly connected with the second rotating shaft (12), and the lower surfaces of the stirring blades (14) are in contact with the upper surface of the first screen (2);
one end of the first rack (15) penetrates through the left side wall of the upper box body (1) and extends into the upper box body (1), the first rack (15) is connected with the left side wall of the upper box body (1) in a sliding mode, one side, facing the second gear (11), of the first rack (15) is provided with teeth, the toothed side of the first rack (15) is meshed with the teeth of the second gear (11), the other end of the first rack (15) extends to the outside of the upper box body (1) and is provided with a baffle (16), and the baffle (16) is perpendicular to the first rack (15) and is fixedly connected with one end, far away from the second gear (11), of the first rack (15);
the sliding rod (17) is arranged on one side, facing the upper box body (1), of the baffle plate (16), the sliding rod (17) is perpendicular to the baffle plate (16), one end, far away from the baffle plate (16), of the sliding rod (17) penetrates through the left side wall of the upper box body (1) and extends into the upper box body (1), a push plate (18) is arranged, a sieve hole in the left-right direction is formed in the push plate (18), and the push plate (18) is parallel to the baffle plate (16);
first spring (19), first spring (19) cover is established on slide bar (17), first spring (19) one end with baffle (16) lateral wall fixed connection, first spring (19) other end with go up box (1) left side outer wall fixed connection.
4. An efficient impurity-removable grain dryer as claimed in claim 1, wherein the diameter of the mesh in said first screen (2) is larger than the diameter of the mesh in said second screen (6).
5. The efficient grain dryer capable of removing foreign materials of claim 1, wherein the right sidewall of the upper cabinet (1) is provided with a collection box (20), the collection box (20) is communicated with the inside of the upper cabinet (1) through a first through hole (21), and the first through hole (21) is positioned above the first screen (2).
6. The efficient grain dryer capable of removing impurities as claimed in claim 1, wherein the outer side wall of the lower box (4) is provided with an insulating layer (22), and the insulating layer (22) is made of insulating and high temperature resistant material.
7. The efficient impurity-removable grain dryer of claim 1, further comprising:
the two first grooves (23) are symmetrically arranged on the inner walls of the left side and the right side of the lower box body (4), guide rods (24) are arranged in the first grooves (23), and the upper ends and the lower ends of the guide rods (24) are fixedly connected with the inner walls of the upper side and the lower side of the first grooves (23) respectively;
the first sliding block (25) is arranged on the guide rod (24), the first sliding block (25) is connected with the guide rod (24) in a sliding mode, and the left end and the right end of the second screen (6) are fixedly connected with the side walls of the two first sliding blocks (25) on the left side and the right side respectively;
the second spring (26) is sleeved on the guide rod (24), one end of the second spring (26) is fixedly connected with the upper surface of the first sliding block (25), and the other end of the second spring (26) is fixedly connected with the inner wall of the upper side of the first groove (23);
the third spring (27) is sleeved on the guide rod (24), one end of the third spring (27) is fixedly connected with the lower surface of the first sliding block (25), and the other end of the third spring (27) is fixedly connected with the inner wall of the lower side of the first groove (23);
the two rotating rods (28) are symmetrically arranged on the inner walls of the left side and the right side of the lower box body (4), the rotating rods (28) are hinged with the inner wall of the lower box body (4), a mounting plate (29) is arranged on one side, facing the second screen (6), of each rotating rod (28), a plurality of air heaters (30) are arranged on the mounting plate (29), and the outlet ends of the air heaters (30) are aligned to the upper surface of the second screen (6);
connecting rod (31), connecting rod (31) one end with first slider (25) are close to second screen cloth (6) a lateral wall is articulated to be connected, connecting rod (31) the other end with dwang (28) lateral wall is articulated to be connected.
8. The efficient grain dryer capable of removing impurities of claim 7, wherein a first air pipe (32) is further disposed at an outlet end of the hot air blower (30), a second air pipe (33) is disposed at an end of the first air pipe (32) away from the hot air blower (30), an end of the second air pipe (33) away from the first air pipe (32) penetrates through an upper side wall of the lower box (4) and extends to above the lower box (4), and a third air pipe (34) is disposed, an end of the third air pipe (34) away from the second air pipe (33) penetrates through a left side wall of the upper box (1) and extends to the inside of the upper box (1), the third air pipe (34) is disposed above the first screen (2), a third screen (35) is disposed at an end of the third air pipe (34) away from the second air pipe (33), and the third air pipe (34) is communicated with the first air pipe (32) through the second air pipe (33), the first air pipe (32) is provided as a hose.
9. An efficient impurity-removable grain dryer as claimed in claim 1, wherein an auxiliary device is provided under said second screen (6), said auxiliary device comprising:
the second motor (36) is arranged on the inner wall of the rear side of the lower box body (4), a third rotating shaft (37) is arranged at the output end of the second motor (36), a fourth gear (38) is arranged at one end, far away from the second motor (36), of the third rotating shaft (37), and the fourth gear (38) is an incomplete gear;
the rectangular frame (39) is arranged inside the lower box body (4), the rectangular frame (39) is located on the periphery of the fourth gear (38), second racks (40) are arranged on the inner walls of the upper side and the lower side of the rectangular frame (39), and the second racks (40) are meshed with the fourth gear (38) in a tooth form;
the two supporting columns (41) are symmetrically arranged at the left end and the right end of the rectangular frame (39), one end of each supporting column (41) is fixedly connected with the outer wall of the rectangular frame (39), and the other end of each supporting column (41) is provided with a second sliding block (42);
the sliding rail (43) is arranged on the inner wall of the lower side of the lower box body (4), and the second sliding block (42) is connected with the sliding rail (43) in a sliding manner;
the sleeves (44) are arranged on the upper surface of the rectangular frame (39), sliding columns (45) are connected in the sleeves (44) in a sliding mode, bristles (46) are arranged at one ends, close to the second screen (6), of the sliding columns (45), the bristles (46) are in contact with the lower surface of the second screen (6), fourth springs (47) are arranged at one ends, far away from the bristles (46), of the sliding columns (45), one ends of the fourth springs (47) are fixedly connected with the lower ends of the sliding columns (45), and the other ends of the fourth springs (47) are fixedly connected with the upper surface of the rectangular frame (39);
the cam (48) is arranged on the third rotating shaft (37), the cam (48) is positioned between the second motor (36) and the fourth gear (38), and the protruding end of the cam (48) can be in contact with the lower surface of the second screen (6).
10. The efficient impurity-removable grain dryer of claim 7, further comprising an alarm device, said alarm device comprising:
the first temperature detection device is arranged on the outer wall of the upper box body (1) and used for detecting the ambient temperature outside the upper box body (1);
the second temperature detection device is arranged on the outer wall of the lower box body (4) and used for detecting the temperature of the outer wall of the lower box body (4);
the third temperature detection device is arranged at the outlet end of the hot air blower (30) and is used for detecting the temperature of the outlet end of the hot air blower (30);
the moisture tester is arranged inside the lower box body (4) and is used for detecting the moisture content of the grain to be dried on the second screen (6);
the flow velocity sensor is arranged at the outlet end of the hot air blower (30) and is used for detecting the flow velocity of hot air at the outlet end of the hot air blower (30);
the timer is arranged on the outer wall of the upper box body (1) and used for recording the working time length when the air heater (30) is closed;
the alarm is arranged at the upper end of the upper box body (1);
the controller is arranged on the outer wall of the upper box body (1), and is respectively electrically connected with the first temperature detection device, the second temperature detection device, the third temperature detection device, the flow velocity sensor of the moisture tester, the timer and the alarm;
the controller is based on first temperature-detecting device, second temperature-detecting device, third temperature-detecting device, moisture tester, flow rate sensor reaches the time-recorder control the alarm work, includes following step:
step 1: when the moisture content of the grain to be dried on the second screen (6) detected by the moisture tester is lower than a preset moisture content, the controller controls the timer and the hot air blower (30) to be closed, the timer records the working time of the hot air blower (30) when the hot air blower (30) is closed, and at the moment, based on the detection values of the first temperature detection device, the second temperature detection device, the third temperature detection device and the timer, the heat loss of the hot air blower (30) in the working time of the hot air blower (30) recorded by the timer is calculated through a formula (1):
Figure FDA0003010553590000061
wherein Q is1For the heat loss of the air heater (30) over the period of time of operation of the air heater (30) recorded by the timer, δ1Is the heat transfer coefficient of the side wall of the lower box body (4),
Figure FDA0003010553590000062
is the thermal conductivity of the material of the side wall of the lower box (4), a1Is the thickness of the side wall of the lower box body (4), sigma1Is the convective heat transfer coefficient S of the side wall of the lower box body (4)1Is the total area, T, of the outer surface of the lower box (4)3The temperature T of the outlet end of the air heater (30) detected by the third temperature detection device2The temperature T of the outer wall of the lower box body (4) detected by the second temperature detection device1The ambient temperature t outside the upper box body (1) detected by the first temperature detection devicejThe working time length of the air heater (30) when the air heater is closed is recorded by the timer, and ln is a natural logarithm;
step 2: calculating the actual energy utilization rate of the air heater (30) by the formula (2) based on the detection values of the flow rate sensor and the timer:
Figure FDA0003010553590000063
wherein eta is1For the actual energy utilization of the air heater (30), C1Is the specific heat capacity, rho, of the hot air generated by the air heater (30)1Density, v, of hot air generated by the air heater (30)1The flow velocity of the hot air at the outlet end of the air heater (30) is detected by a flow velocity sensor, S2The cross-sectional area of the outlet end of the hot air blower (30);
and step 3: the controller compares the actual energy utilization rate of the air heater (30) with the preset energy utilization rate of the air heater (30), and when the actual energy utilization rate of the air heater (30) is smaller than the preset energy utilization rate of the air heater (30), the controller controls the alarm to send out an alarm prompt.
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