CN108325847B - It is centrifuged negative pressure grain screening agricultural apparatus and method - Google Patents

It is centrifuged negative pressure grain screening agricultural apparatus and method Download PDF

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Publication number
CN108325847B
CN108325847B CN201810071314.9A CN201810071314A CN108325847B CN 108325847 B CN108325847 B CN 108325847B CN 201810071314 A CN201810071314 A CN 201810071314A CN 108325847 B CN108325847 B CN 108325847B
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China
Prior art keywords
negative pressure
bottom support
sieve
rotary bottom
screen tray
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CN201810071314.9A
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CN108325847A (en
Inventor
朱兆明
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Enshi Siqing Agriculture Co ltd
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Dongyang Zhilin Technology Co Ltd
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Priority to CN201810071314.9A priority Critical patent/CN108325847B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/10Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force having air recirculating within the apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/02Arrangement of air or material conditioning accessories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001Drying-air generating units, e.g. movable, independent of drying enclosure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00Details applicable to machines for screening using sieves or gratings
    • B07B2201/04Multiple deck screening devices comprising one or more superimposed screens
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/06Grains, e.g. cereals, wheat, rice, corn

Abstract

The invention discloses a kind of centrifugation negative pressure grain screening agricultural apparatus and methods, device includes feed pipe, screening bucket, blanking pedestal and drying unit, the feed pipe setting connection is in the upper end of screening bucket, the bottom of the screening bucket is connected to blanking pedestal, the discharging end of the blanking pedestal is corresponding with the feed end of drying unit, and blanking pedestal support is set on drying unit.The configuration of the present invention is simple, principle is simple, can carry out centrifugal screening according to the different-grain diameter grade of cereal, while the cereal screened out has completed the removal of impurity, effect is good.

Description

It is centrifuged negative pressure grain screening agricultural apparatus and method
Technical field
The invention belongs to agricultural machinery correlative technology fields.
Background technique
Agricultural machinery circulation industry is open, the higher industry of Market Orientation, there are distributors in industry more, collection The features such as moderate is low, market competition is lack of standardization, so that the competition of agricultural machinery circulation market is very fierce.In addition, as country is to agricultural The reinforcement of support on policy dynamics, the increase of the allowance for purchasing agricultural machinery project funds bring the same of further prosperity to Farm Machinery Market When, also aggravate the market competition in industry.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of centrifugation negative pressure grain screening Agricultural apparatus and method, structure is simple, and principle is simple, can carry out centrifugal screening according to the different-grain diameter grade of cereal, together When the cereal that screens out completed the removal of impurity, effect is good.
Technical solution: to achieve the above object, technical scheme is as follows:
Be centrifuged negative pressure grain screening agricultural apparatus, including feed pipe, screening bucket, blanking pedestal and drying unit, it is described into Expects pipe setting connection is connected in the upper end of screening bucket, the bottom of the screening bucket with blanking pedestal, the blanking of the blanking pedestal End is corresponding with the feed end of drying unit, and blanking pedestal support is set on drying unit.
Further, the screening bucket includes negative pressure channel exocoel, negative pressure inner cavity, screen tray, rotary bottom support, electricity from outside to inside Machine and telescoping cylinder, the negative pressure channel exocoel surround setting in negative pressure inner cavity periphery, the negative pressure channel exocoel and negative pressure inner cavity Between be connected to by upper air hole, air inlet, the bottom of the negative pressure channel exocoel are provided at the top of the negative pressure inner cavity It is provided with and communicated with extractor fan, the bottom of the extractor fan is provided with gas outlet;The telescoping cylinder is supported by bracket to be arranged In the lower section of negative pressure inner cavity, the movable end of the telescoping cylinder is provided with motor, the bottom at the driving end and rotary bottom support of the motor The setting of portion's central vertical;It is lifted on the rotary bottom support and is equipped with screen tray, and rotate driving screen tray centrifugal rotation;The sieve Feed pipe is provided with right above disk.
It further, further include pod, the pod is perforative frustum cone structure, and upper surface is small, and lower end surface is big;Institute State pod and be provide with installation down from motor, the bottom of the pod is erected on bracket, the lower end surface of the pod with A ring gap channel is kept between negative pressure inner cavity, is used for blanking.
Further, the bottom of the screening bucket, and be located at the lower end surface of the pod or less position and be provided with a circle Seep air port, the adjustable section for seeping air port.
Further, it is uniformly distributed on the outer wall of the pod and is provided with electric heating wire.
Further, the rotary bottom support by centre to edge by circumference be disposed with intermediolateral column, several interior loop pillars and Several outer loop pillars, the height of the intermediolateral column are greater than the height of interior loop pillar, and the height of the interior loop pillar is greater than the height of outer loop pillar; The intermediolateral column is located at the centre of rotary bottom support, and the outer loop pillar is located at an outer ring at least circumference for rotary bottom support, the inner ring Column is on at least circumference between intermediolateral column and outer loop pillar.
Further, the screen tray includes being disposed with the first stepped sieve chamber, the by circumference by centre to edge Two sieve chambers and third sieve chamber, are higher than the second sieve chamber present position by the first sieve chamber, the second sieve chamber is higher than third and sieves chamber present position; Several first sieve pores are offered on the wall body of the first sieve chamber, and several second sieves are offered on the wall body of the second sieve chamber Hole offers several third sieve pores, the hole of first sieve pore, the second sieve pore and third sieve pore on the wall body of third sieve chamber Diameter is sequentially reduced;And if it is described first sieve chamber, second sieve chamber and third sieve chamber bottom offer respectively perforative first leak hole, Dry second leak hole and several third leak holes, the size of first leak hole, several second leak holes and several third leak holes respectively with The size of intermediolateral column, several interior loop pillars and several outer loop pillars matches.
Further, the shape of the blanking pedestal is perforative inverted round table structure, and upper surface is big, and lower end surface is small.
It is centrifuged the working method of negative pressure grain screening agricultural apparatus:
Extractor fan is opened, two air circulation streams is formed, is largely first air stream by being penetrated among air inlet Into screen tray, air hole is spread outward to by screen tray center, then continues along and is advanced into exhausting dress under negative pressure channel exocoel Set the negative pressuren zone to be formed;
Fraction is that Article 2 air stream is upward along the outer wall of pod by seeping air port, and air stream carries the heat of electric heating wire Amount, so that heat is full of the negative pressure inner cavity of pod area above;Then this burst of air stream is incorporated in first air stream;
Cereal is entered in the first sieve chamber of screen tray by feed pipe, when the cereal of the first intracavitary entrance of sieve reaches threshold values, Feed pipe stops charging, and rotary bottom support is bonded matching with screen tray completely, and rotary bottom support drives screen tray to be centrifuged circle rotation, the first sieve Cereal in chamber gradually sieves chamber according to particle size dispersion to the second sieve chamber and third by the first sieve chamber;The particulate matter of impurity partial size with First air stream takes negative pressure inner cavity out of;
Rotary bottom support stops rotating, and rotary bottom support passes through the upward support of limit plate, rotary bottom support and sieve to bottom offset, screen tray Disk being embedded mated condition completely by being detached from;Rotary bottom support is mutually disengaged to bottom offset, loop pillar outer first with third leak hole, and Outer loop pillar and third leak hole generate the first spacing between each other, and rotary bottom support rotates again, continue rotation and drive screen tray rotation, the Path cereal centrifugation in one spacing is thrown away;
Rotary bottom support stops rotating, and rotary bottom support continues to bottom offset, and interior loop pillar is mutually disengaged with the second leak hole, and loop pillar The second spacing is generated between each other with the second leak hole, and rotary bottom support rotates again, and screen tray is static, the central diameter cereal in the second spacing Centrifugation is thrown away;
Rotary bottom support stops rotating, and rotary bottom support continues to bottom offset, and intermediolateral column is mutually disengaged with the first leak hole, screen tray with It being completely disengaged between rotary bottom support, intermediolateral column and the first leak hole generate third spacing between each other, and rotary bottom support rotates again, the Major diameter cereal centrifugation in three spacing is thrown away;
Rotary bottom support rotate to intermediolateral column, several interior loop pillars and several outer loop pillars respectively with first sieve chamber, second sieve chamber and Third sieve chamber matching is raised above rotary bottom support when corresponding to, until being bonded matching completely with screen tray.
The utility model has the advantages that the configuration of the present invention is simple, principle is simple, can carry out according to the different-grain diameter grade of cereal centrifugal Screening, while the cereal screened out has completed the removal of impurity, effect is good.
1) it realizes that cereal is realized according to different-grain diameter grade by the method for centrifuge separation to separate, the process separated herein In, it is adjoint with negative pressure system, the impurity in cereal separate herein during as negative-pressure adsorption is gone out, isolated difference The cereal of partial size passes sequentially through the blanking of blanking pedestal to specified position in a different order;During the separation process, it can open Desiccant electric heating system, so that negative pressure inner cavity forms the temperature that drying has, it is dry high during realizing separation Warm negative pressure gas flow penetrates between each grain, and drying effect is splendid.
2) pod shape design and installation site design so that most of air inlet be from enterprising port into Enter, prevents the excessive too strong inlet air flow in lower section from causing excessive interference to whereabouts cereal;Again matching design have seep air port and its Seep the design position in air port, the high temperature air stream that negative pressure inner cavity is diffuseed to form from the bottom to top, so that dry effect Fruit it is further preferred that, such design also avoids dry heat system and is directly arranged too close to the drying caused by screen tray position Cereal caused by excessively destroys;Such high temperature air stream is flowing simultaneously, avoids non-flowing type hot-air to a certain region It is long-term baking caused by cereal destroy.
3) design structure and working method that the rotation between screen tray and rotary bottom support drives and gradually disengages, cleverly So that cereal realizes the separation by the progress of partial size grade gradually and orderly, structure is simple, excellent, takes full advantage of negative pressure inner cavity Inner space and drying heating effect utilization.
4) what is flowed in negative pressure channel exocoel is the stream of hot air extracted out from negative pressure inner cavity, can by this burst of stream of hot air Effectively to make the temperature of negative pressure inner cavity constant, and internal whole temperature graded region tends to be constant for a long time, no It is influenced by the external world.
5) it is uniformly distributed on the outer wall of pod and is provided with electric heating wire to cereal prebake, after cereal is by partial size separation Further further dried in the drying unit that blanking pedestal corresponds to blanking.
Detailed description of the invention
Accompanying drawing 1 is the structural representation of the present invention one;
Attached drawing 2 is structural schematic diagram two of the invention;
Attached drawing 3 is structural schematic diagram three of the invention;
Attached drawing 4 is structural schematic diagram four of the invention;
Attached drawing 5 is partial structural diagram one of the invention;
Attached drawing 6 is partial structural diagram two of the invention.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
Such as attached drawing 1,2,3 and 4, it is centrifuged negative pressure grain screening agricultural apparatus, including feed pipe 1, screening bucket 2, blanking pedestal 3 With drying unit 4, the setting of feed pipe 1 connection connects in the upper end of screening bucket 2, the bottom of the screening bucket 2 and blanking pedestal 3 Logical, the discharging end of the blanking pedestal 3 is corresponding with the feed end of drying unit 4, and the blanking pedestal 3 support is set to drying On device 4.The shape of the blanking pedestal 3 is perforative inverted round table structure, and upper surface is big, and lower end surface is small.
The screening bucket 2 includes negative pressure channel exocoel 11, negative pressure inner cavity 12, screen tray 13, rotary bottom support 14, electricity from outside to inside Machine 15 and telescoping cylinder 16, the negative pressure channel exocoel 11 surround setting in 12 periphery of negative pressure inner cavity, the negative pressure channel exocoel 11 It is connected between negative pressure inner cavity 12 by upper air hole 121, the top of the negative pressure inner cavity 12 is provided with air inlet 9, described The bottom of negative pressure channel exocoel 11 is provided with and communicated with extractor fan 6, and the bottom of the extractor fan 6 is provided with gas outlet 61;Institute It states telescoping cylinder 16 and supports the lower section for being set to negative pressure inner cavity 12 by bracket 8, the movable end of the telescoping cylinder 16 is provided with motor 15, the driving end of the motor 15 and the bottom center of rotary bottom support 14 are vertically arranged;Cooperation is lifted on the rotary bottom support 14 It is provided with screen tray 13, and rotates driving 13 centrifugal rotation of screen tray;The surface of the screen tray 13 is provided with feed pipe 1.
What is flowed in negative pressure channel exocoel 11 is the stream of hot air extracted out from negative pressure inner cavity, can by this burst of stream of hot air Effectively to make the temperature of negative pressure inner cavity constant, and internal whole temperature graded region tends to be constant for a long time, no It is influenced by the external world.
It further include pod 17 such as attached drawing 6, the pod 17 is perforative frustum cone structure, and upper surface is small, lower end surface Greatly;The pod 17 is provide with installation from motor 15 down, and the bottom of the pod 17 is erected on bracket 8, the water conservancy diversion A ring gap channel is kept between the lower end surface and negative pressure inner cavity 12 of cover 17, is fallen for cereal.The bottom of the screening bucket 2, And be located at the pod 17 lower end surface below position be provided with a circle seep air port 7, it is described seep air port 7 adjustable section, The position that air port 7 is arranged is seeped, lower section may be implemented to enter the air stream of negative pressure inner cavity to be shallow bid, while change can also be passed through The size for seeping air port 7 further realizes.It is uniformly distributed on the outer wall of the pod 17 and is provided with electric heating wire 171.Pod Shape design and the design of installation site so that most of air inlet is entered from enterprising port, prevent below mistake Big too strong inlet air flow causes excessive interference to whereabouts cereal;Matching design has the design position seeped air port and its seep air port again Set, the high temperature air stream that negative pressure inner cavity is diffuseed to form from the bottom to top so that drying effect it is further preferred that, it is such to set Meter, also avoid dry heat system directly be arranged too close to the drying caused by screen tray position excessively caused by cereal break It is bad;Such high temperature air stream is flowing simultaneously, avoids non-flowing type hot-air caused by some region of long-term baking Cereal destroys.
Such as attached drawing 5, the rotary bottom support 14 is disposed with intermediolateral column 141, several inner rings by circumference by centre to edge Column 142 and several outer loop pillars 143, the height of the intermediolateral column 141 are greater than the height of interior loop pillar 142, the height of the interior loop pillar 142 Degree is greater than the height of outer loop pillar 143;The intermediolateral column 141 is located at the centre of rotary bottom support 14, and the outer loop pillar 143 is located at rotation The outer ring of a collet 14 at least circumference, an at least circumference of the interior loop pillar 142 between intermediolateral column 141 and outer loop pillar 143 On.
The screen tray 13 includes being disposed with the first stepped sieve chamber 131, second by circumference by centre to edge to sieve Chamber 132 and third sieve chamber 133, are higher than the second sieve 132 present position of chamber by the first sieve chamber 131, the second sieve chamber 132 is sieved higher than third 133 present position of chamber;Several first sieve pores 134 are offered on the wall body of the first sieve chamber 131, the second sieve chamber 132 Several second sieve pores 135 are offered on wall body, offer several third sieve pores 136 on the wall body of the third sieve chamber 133, it is described The aperture of first sieve pore 134, the second sieve pore 135 and third sieve pore 136 is sequentially reduced;And the first sieve chamber 131, second sieves chamber 132 and third sieve chamber 133 bottom offer respectively perforative first leak hole 137, several second leak holes 138 and several thirds leakage Hole 139, the size of first leak hole 137, several second leak holes 138 and several third leak holes 139 respectively with intermediolateral column 141, The size of several interior loop pillars 142 and several outer loop pillars 143 matches.Between screen tray and rotary bottom support rotation driving and gradually The design structure and working method of disengaging cleverly make cereal realize the separation by the progress of partial size grade gradually and orderly, structure Simply, excellent takes full advantage of the utilization of the inner space of negative pressure inner cavity and the heating effect of drying.
It is centrifuged the working method of negative pressure grain screening agricultural apparatus:
Extractor fan 6 is opened, two air circulation streams is formed, is largely first air stream by being worn among air inlet 9 It penetrates into screen tray 13, air hole 121 is spread outward to by 13 center of screen tray, then continues along 11 downlink of negative pressure channel exocoel The negative pressuren zone formed into extractor fan 6;
Fraction is that Article 2 air stream is upward along the outer wall of pod 17 by seeping air port 7, and air stream carries electric heating wire 171 heat, so that heat is full of the negative pressure inner cavity 12 of 17 area above of pod;Then this burst of air stream is incorporated to first sky In air-flow;
Cereal is entered in the first sieve chamber 131 of screen tray 13 by feed pipe 1, when the cereal entered in the first sieve chamber 131 reaches When to threshold values, feed pipe 1 stops charging, and rotary bottom support 14 is bonded matching, the driving screen tray 13 of rotary bottom support 14 with screen tray 13 completely It is centrifuged circle rotation, the cereal in the first sieve chamber 131 is by the first sieve chamber 131 gradually according to particle size dispersion to the second sieve 132 He of chamber Third sieves chamber 133;The particulate matter of impurity partial size takes negative pressure inner cavity 12 out of with first air stream;
Rotary bottom support 14 stops rotating, and rotary bottom support 14 passes through the upward support of limit plate 18, rotation to bottom offset, screen tray 13 Collet 14 is with screen tray 13 by being detached from being embedded mated condition completely;Rotary bottom support 14 is to bottom offset, loop pillar 143 outer first and Three leak holes 139 are mutually disengaged, and outer loop pillar 143 and third leak hole 139 generate the first spacing between each other, and rotary bottom support 14 is again Rotation continues rotation and screen tray 13 is driven to rotate, and the path cereal centrifugation in the first spacing is thrown away;
Rotary bottom support 14 stops rotating, and rotary bottom support 14 continues to bottom offset, and interior loop pillar 142 and the second leak hole 138 are mutually It is detached from, and loop pillar 142 and the second leak hole 138 generate the second spacing between each other, rotary bottom support 14 rotates again, and screen tray 13 is quiet Only, the central diameter cereal centrifugation in the second spacing is thrown away;
Rotary bottom support 14 stops rotating, and rotary bottom support 14 continues to bottom offset, and intermediolateral column 141 and the first leak hole 137 are mutually It is detached from, is completely disengaged between screen tray 13 and rotary bottom support 14, between intermediolateral column 141 and the mutual generation third of the first leak hole 137 Away from rotary bottom support 14 rotates again, and the major diameter cereal centrifugation in third spacing is thrown away;
The rotation of rotary bottom support 14 sieves chamber with first respectively to intermediolateral column 141, several interior loop pillars 142 and several outer loop pillars 143 131, the second sieve chamber 132 and third sieve chamber 133 matching are raised above rotary bottom support 14 when corresponding to, until pasting completely with screen tray 13 Close matching.
It realizes that cereal is realized according to different-grain diameter grade by the method for centrifuge separation to separate, during separating herein, It is adjoint with negative pressure system, the impurity in cereal separate herein during as negative-pressure adsorption is gone out, the different grains of separation The cereal of diameter passes sequentially through the blanking of blanking pedestal to specified position in a different order;During the separation process, it can open dry Dry electric heating system, so that negative pressure inner cavity forms the temperature that drying has, during realizing separation, dry high temperature Negative pressure gas flow penetrates between each grain, and drying effect is splendid.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (7)

1. being centrifuged negative pressure grain screening agricultural apparatus, it is characterised in that: including feed pipe (1), screening bucket (2), blanking pedestal (3), feed pipe (1) the setting connection is in the upper end of screening bucket (2), and the bottom and blanking pedestal (3) of screening bucket (2) are even It is logical;
The screening bucket (2) includes negative pressure channel exocoel (11), negative pressure inner cavity (12), screen tray (13), rotary bottom support from outside to inside (14), motor (15) and telescoping cylinder (16), negative pressure channel exocoel (11) the encirclement setting is peripheral in negative pressure inner cavity (12), described It is connected between negative pressure channel exocoel (11) and negative pressure inner cavity (12) by upper air hole (121), the negative pressure inner cavity (12) Top is provided with air inlet (9), and the bottom of the negative pressure channel exocoel (11) is provided with and communicated with extractor fan (6), the exhausting The bottom of device (6) is provided with gas outlet (61);The telescoping cylinder (16) is set to negative pressure inner cavity (12) by bracket (8) support Lower section, the movable end of the telescoping cylinder (16) is provided with motor (15), the driving end of the motor (15) and rotary bottom support (14) bottom center is vertically arranged;It lifts and is equipped with screen tray (13) on the rotary bottom support (14), and rotate driving sieve Disk (13) centrifugal rotation;Feed pipe (1) is provided with right above the screen tray (13);
The rotary bottom support (14) by centre to edge by circumference be disposed with intermediolateral column (141), several interior loop pillars (142) and Several outer loop pillars (143), the height of the intermediolateral column (141) are greater than the height of interior loop pillar (142), the interior loop pillar (142) Height is greater than the height of outer loop pillar (143);The intermediolateral column (141) is located at the centre of rotary bottom support (14), the outer loop pillar (143) it is located at an outer ring at least circumference of rotary bottom support (14), the interior loop pillar (142) is located at intermediolateral column (141) and outer loop pillar (143) on at least circumference between;
The screen tray (13) includes being disposed with the first stepped sieve chamber (131), the second sieve by circumference by centre to edge Chamber (132) and third sieve chamber (133) are higher than second sieve chamber (132) present position, the second sieve chamber (132) by the first sieve chamber (131) Chamber (133) present position is sieved higher than third;Several first sieve pores (134), institute are offered on the wall body of first sieve chamber (131) It states and offers several second sieve pores (135) on the wall body of the second sieve chamber (132), opened up on the wall body of third sieve chamber (133) There are several third sieve pores (136), the aperture of first sieve pore (134), the second sieve pore (135) and third sieve pore (136) is successively Reduce;And first sieve chamber (131), the second sieve chamber (132) and third sieve the bottom of chamber (133) and offer perforative the respectively One leak hole (137), several second leak holes (138) and several third leak holes (139), first leak hole (137), several second leakages The size of hole (138) and several third leak holes (139) respectively with intermediolateral column (141), several interior loop pillars (142) and several outer loop pillars (143) size matches.
2. centrifugation negative pressure grain screening agricultural apparatus according to claim 1, it is characterised in that: further include pod (17), the pod (17) is perforative frustum cone structure, and upper surface is small, and lower end surface is big;The pod (17) is from motor (15) be provide with installation down, the bottom of the pod (17) is erected on bracket (8), the lower end surface of the pod (17) with A ring gap channel is kept between negative pressure inner cavity (12).
3. centrifugation negative pressure grain screening agricultural apparatus according to claim 2, it is characterised in that: screening bucket (2) Bottom, and be located at the lower end surface of the pod (17) or less position and be provided with circle infiltration air port (7), infiltration air port (7) Adjustable section.
4. centrifugation negative pressure grain screening agricultural apparatus according to claim 2, it is characterised in that: the pod (17) It is uniformly distributed on outer wall and is provided with electric heating wire (171).
5. centrifugation negative pressure grain screening agricultural apparatus according to claim 1, it is characterised in that: the blanking pedestal (3) Shape be perforative inverted round table structure, upper surface is big, and lower end surface is small.
6. centrifugation negative pressure grain screening agricultural apparatus according to claim 1, it is characterised in that: further include drying unit (4), the discharging end of the blanking pedestal (3) is corresponding with the feed end of drying unit (4), and the blanking pedestal (3) support is set It is placed on drying unit (4).
7. being centrifuged the working method of negative pressure grain screening agricultural apparatus, it is characterised in that:
It opens extractor fan (6), forms two air circulation streams, be largely first air stream by being worn among air inlet (9) It penetrates into screen tray (13), air hole (121) is spread outward to by screen tray (13) center, then continue along negative pressure channel exocoel (11) negative pressuren zone of extractor fan (6) formation is advanced under;
Fraction is that Article 2 air stream is upward along the outer wall of pod (17) by seeping air port (7), and air stream carries electric heating wire (171) heat, so that heat is full of the negative pressure inner cavity (12) of pod (17) area above;Then this burst of air stream is incorporated to In one air stream;
Cereal is entered in first sieve chamber (131) of screen tray (13) by feed pipe (1), when the paddy entered in the first sieve chamber (131) When object reaches threshold values, feed pipe (1) stops charging, and rotary bottom support (14) is bonded matching, rotary bottom support completely with screen tray (13) (14) driving screen tray (13) is centrifuged circle rotation, and the cereal in the first sieve chamber (131) is by the first sieve chamber (131) gradually according to partial size It is dispersed to the second sieve chamber (132) and third sieve chamber (133);The particulate matter of impurity partial size is taken out of in negative pressure with first air stream Chamber (12);
Rotary bottom support (14) stops rotating, and rotary bottom support (14) passes through limit plate (18) upward support to bottom offset, screen tray (13), Rotary bottom support (14) is with screen tray (13) by being detached from being embedded mated condition completely;Rotary bottom support (14) is outer first to bottom offset Loop pillar (143) is mutually disengaged with third leak hole (139), and outer loop pillar (143) and third leak hole (139) generate first between each other Spacing, rotary bottom support (14) rotate again, continue rotation and drive screen tray (13) rotation, the path cereal centrifugal drying in the first spacing Out;
Rotary bottom support (14) stops rotating, and rotary bottom support (14) continues to bottom offset, interior loop pillar (142) and the second leak hole (138) It is mutually disengaged, and interior loop pillar (142) and the second leak hole (138) generate the second spacing between each other, rotary bottom support (14) revolves again Turn, screen tray (13) is static, and the central diameter cereal centrifugation in the second spacing is thrown away;
Rotary bottom support (14) stops rotating, and rotary bottom support (14) continues to bottom offset, intermediolateral column (141) and the first leak hole (137) Be mutually disengaged, completely disengaged between screen tray (13) and rotary bottom support (14), intermediolateral column (141) and the first leak hole (137) mutually it Between generate third spacing, rotary bottom support (14) rotates again, and the major diameter cereal centrifugation in third spacing is thrown away;
Rotary bottom support (14) rotation is to intermediolateral column (141), several interior loop pillars (142) and several outer loop pillars (143) respectively with first Sieve chamber (131), the second sieve chamber (132) and third sieve chamber (133) matching are raised above rotary bottom support (14) when corresponding to, until with Screen tray (13) fitting matching completely.
CN201810071314.9A 2018-01-25 2018-01-25 It is centrifuged negative pressure grain screening agricultural apparatus and method Active CN108325847B (en)

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CN110052402B (en) * 2019-04-25 2021-09-24 兰利珍 Capsule screening detection device
CN112570275B (en) * 2020-11-25 2021-11-23 宣威市金泰资源综合利用有限公司 Industrial solid waste harmless treatment equipment and treatment method
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CN206373049U (en) * 2016-12-04 2017-08-04 缙云县南瓯堂企业管理咨询有限公司 A kind of rotating centrifugal screening machine
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