CN110293062A

CN110293062A - A kind of grain rough separating screen screening device

Info

Publication number: CN110293062A
Application number: CN201910563325.3A
Authority: CN
Inventors: 赵洁
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2019-10-01

Abstract

The invention discloses a kind of grain rough separating screen screening devices, including bottom plate, feed chamber, main body, feeding device, screening plant and collecting box, four corners of the bottom plate bottom end are mounted on heel brace, and the side at the top of bottom plate is fixed with feed chamber, the other side at the top of the bottom plate is equipped with main body, and main body is provided with the first impurities outlet far from the bottom end of feed chamber side, collecting box is fixed at the top of the bottom plate of described main body one end, and collecting box offers out the mouth of a valley far from the bottom of main body one end, the main body is equipped with control panel far from the middle position of collecting box one end, and door body is installed in the main body below control panel.The grain rough separating screen screening device is by being equipped with feeding device, its internal spiral feeding shaft can drive the rough rising of the indoor paddy of raw material when rotating, and enters main body under the action of blowing material blower and carry out separation screening, without raw material is manually added, the work load for alleviating staff, using more convenient.

Description

A kind of grain rough separating screen screening device

Technical field

The present invention relates to the rough separation technology field of paddy, specially a kind of grain rough separating screen screening device.

Background technique

Traditional food of the cereal as Chinese, for thousands of years always on common people's dining table indispensable food it One, it occupies an important position in the diet in China, is taken as traditional staple food, cereal processing is time-honored traditional row Industry, is the important composition content of China's grain and oil process systems, the rough separation of paddy, also known as selects rough, is that will separate in mixture of paddy and husked rice The process of brown rice out, the existing rough separator structure of paddy is simple, and it is inconvenient to clear up after use, and inferior separating effect can not be by cereal In the impurity such as dust stone remove, be also easy to adulterate some husks in the brown rice isolated, separation is not thorough.

Summary of the invention

The purpose of the present invention is to provide a kind of grain rough separating screen screening devices, mentioned above in the background art existing to solve Some rough separator structures of paddy are simple, and inconvenient, inferior separating effect is cleared up after use, can not be miscellaneous by dust stone in cereal etc. Matter removes, and is also easy to adulterate some husks in the brown rice isolated, separates halfway problem.

To achieve the above object, the invention provides the following technical scheme: a kind of grain rough separating screen screening device, including bottom plate, Four corners of feed chamber, main body, feeding device, screening plant and collecting box, the bottom plate bottom end are mounted on heel brace, and Side at the top of bottom plate is fixed with feed chamber, and the other side at the top of the bottom plate is equipped with main body, and main body is far from feed chamber one The bottom end of side is provided with the first impurities outlet, collecting box is fixed at the top of the bottom plate of described main body one end, and collecting box is far from main The bottom of body one end offers out the mouth of a valley, and the main body is equipped with control panel far from the middle position of collecting box one end, and Door body is installed, the middle position of the door body is equipped with third impurities outlet, and door body in the main body below control panel The top of two sides offers the second impurities outlet, and the main body is equipped with feeding device close to the side of feed chamber, and feeds The bottom of device is located at the inside of feed chamber, and the feeding device is equipped with far from the top of body side blows material blower, and into Material device offers conveying mouth at the top of body side, is equipped with inside the conveying mouth close to the side of feeding device micro- Type motor, and the output end of micromotor is fixed with by shaft and smashes axis, the raw material indoor location below the feeding device There is flitch, and the bottom end of flitch is uniformly fixed with compressed spring, the middle position at the top of the feeding device is equipped with first Motor, and the inside of feeding device is equipped with spiral feeding shaft, the output end of first motor is connected by shaft and spiral feeding shaft It connects, top of the main body far from feed chamber side is uniformly equipped with suction blower, and the middle position of bulk end offers Feed inlet, the main body top above the feed inlet offers round fixing groove, and the two sides inside round fixing groove are respectively mounted There is clamping plate, the inside of the circle fixing groove is equipped with vacuum hopper, and the output end of vacuum hopper is connect with feed inlet, described The side on main body top offers rectangular fixing groove, and the inside of rectangular fixing groove is equipped with suction feeder, suction feeder Input terminal connect with vacuum hopper, the middle position of the body interior is equipped with paddy collection bucket, and paddy collection bucket The body interior of two sides is provided with impurity collection bucket, and the bottom end of the impurity collection bucket is mounted on guide through slot, and guide Through slot is connect with the second impurities outlet, is equipped with screening plant, and screening plant in the main body below the paddy collection bucket The both ends of two sides are mounted on fixed column, and the fixed column is connect with main body, and the fixed column between screening plant and main body On be mounted on buffer spring, the middle position inside the screening plant is oblique to be fixed with the first sieve, and screening plant Inner bottom is diagonally-installed the second sieve, and first sieve is compared with being fixed with the first hose, and on the screening plant of downside One hose is connected with third impurities outlet, and second sieve is sieved compared with being fixed with the second hose on the screening plant of downside Screening device is connected by the second hose with collecting box, and passage, and the top of passage are equipped at the top of the collecting box It is connect with the input terminal of vacuum hopper, the both ends of the screening plant two sides of the bottom are all evenly arranged with restriction tooth, and limit tooth Two sides inside lower body are mounted on fixed frame, and the side of close main body is mounted on damping base at the top of the fixed frame Seat, and the side at the top of fixed frame far from main body passes through bracket and is equipped with gear, the top of the damping base is respectively and fixedly provided with Second motor, and the output end of the second motor is respectively and fixedly provided with the fluted disc mutually ratcheting with gear, the both ends of the gear, which pass through, to be turned Axis is fixed with transmission fluted disc, and it is mutually ratcheting with restriction tooth to be driven fluted disc.

Preferably, the inside of the bottom insertion bottom plate of the main body, and the bottom end of body interior is inclined to set.

Preferably, the cylindrical structure design of the feeding device, and the internal diameter of feeding device is greater than spiral feeding shaft Screw diameter.

Preferably, the side of the flitch fits with the inner wall of feed chamber, and the top structure in a concave shape of flitch Design.

Preferably, the paddy collection bucket and impurity collection bucket are in cone, and the maximum inner diameter of paddy collection bucket is Twice of maximum inner diameter of impurity collection bucket.

Preferably, the screen-aperture of first sieve is greater than the screen-aperture of the second sieve, and the first sieve and second The inclined direction of sieve is opposite.

Preferably, the fixed column is designed in C-shaped structure, and fixed column is detachable by constituting between bolt and main body The design of formula structure.

Preferably, the transmission fluted disc is in one third disc-shaped design, and the surface for being driven fluted disc is in frosted shape structure Design.

Preferably, the clamping plate passes through screw rod and is flexibly connected with round fixing groove composition, and clamping plate is close to vacuum hopper Side it is arc-shaped.

Compared with existing technology, the beneficial effects of the present invention are: the grain rough separating screen screening device is by being equipped with feeding device, Its internal spiral feeding shaft can drive the rough rising of the indoor paddy of raw material when rotating, and enter main body under the action of blowing material blower It carries out separation screening and without raw material is manually added alleviates the work load of staff, using more convenient, device passes through Paddy collection bucket, impurity collection bucket and suction blower are installed, preliminary selection by winnowing can be carried out to raw material, it will most of heavier stone Sub and lighter husk is separated off, and alleviates the pressure of subsequent screening, device by being provided with the first sieve and the second sieve, Can to the cereal after selection by winnowing carry out further removal of impurities and screening, impurity-eliminating effect is more preferable, device by be equipped with micromotor with Axis is smashed, cereal can be broken up, one side can avoid cereal and block feed inlet, on the other hand can avoid cereal agglomeration shadow Ring selection by winnowing, device is by being equipped with transmission fluted disc, gear and fluted disc, and the second motor work belt active toothed disk rotates when use, fluted disc It is mutually engaged with gear, therefore gear is rotated with fluted disc and rotated, to drive driving cog disc spins, transmission fluted disc is stung with tooth is limited It closes, therefore screening plant double swerve can be driven, cereal is screened, use is very convenient, and device is by being equipped with vacuum Hopper, suction feeder and collecting box, the cereal after first screening enters in collecting box, under the suction of suction feeder Enter main body into vacuum hopper, and by feed inlet, carries out postsearch screening, the impurity in cereal is eliminated completely, more in removal of impurities Thoroughly.

Detailed description of the invention

Fig. 1 is that the present invention faces surface structure schematic diagram；

Fig. 2 is that the present invention faces the schematic diagram of the section structure；

Fig. 3 is side structure schematic view of the present invention；

Fig. 4 is gear structure schematic diagram of the present invention；

Fig. 5 is present invention transmission fluted disc structure schematic diagram；

Fig. 6 is overlooking structure diagram of the present invention；

In figure: 1, heel brace；2, bottom plate；3, the first impurities outlet；4, feed chamber；5, main body；6, door body；7, the second impurities outlet； 8, third impurities outlet；9, feeding device；10, control panel；11, material blower is blown；12, suction blower；13, first motor；14, Vacuum hopper；15, suction feeder；16, compressed spring；17, flitch；18, spiral feeding shaft；19, micromotor；20, conveying Mouthful；21, axis is smashed；22, feed inlet；23, paddy collection bucket；24, impurity collection bucket；25, screening plant；26, the first sieve； 27, buffer spring；28, fixed column；29, the second sieve；30, tooth is limited；31, fixed frame；32, guide through slot；33, first is soft Pipe；34, passage；35, the second hose；36, collecting box；37, go out the mouth of a valley；38, it is driven fluted disc；39, gear；40, fluted disc；41, Damping base；42, the second motor；43, rectangular fixing groove；44, round fixing groove；45, clamping plate.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Fig. 1-6 is please referred to, the present invention provides a kind of technical solution: a kind of grain rough separating screen screening device, including bottom plate 2, original Material room 4, main body 5, feeding device 9, screening plant 25 and collecting box 36, four corners of 2 bottom end of bottom plate are mounted on heel brace 1, and the side at 2 top of bottom plate is fixed with feed chamber 4, the other side at 2 top of bottom plate is equipped with main body 5, and main body 5 is far from raw material The bottom end of 4 side of room is provided with the first impurities outlet 3, the inside of the bottom insertion bottom plate 2 of main body 5, and the bottom end inside main body 5 It is inclined to set, it is more stable that embedded design places main body 5, and not easily to fall off and topple over, the safety used is higher, and inclines Tiltedly design is discharged convenient for impurity, and it is more reasonable to design, and collecting box 36 is fixed at the top of the bottom plate 2 of 5 one end of main body, and collecting box 36 is remote Bottom from 5 one end of main body offers out the mouth of a valley 37, and main body 5 is equipped with control plane far from the middle position of 36 one end of collecting box Plate 10, and door body 6 is installed in the main body 5 of 10 lower section of control panel, the middle position of door body 6 is equipped with third impurities outlet 8, and the top of 6 two sides of door body offers the second impurities outlet 7, main body 5 is equipped with feeding device close to the side of feed chamber 4 9, and the bottom of feeding device 9 is located at the inside of feed chamber 4, the design of the cylindrical structure of feeding device 9, and feeding device 9 Internal diameter is greater than the screw diameter of spiral feeding shaft 18, and cylindrical-shaped structure design is more bonded with the shape of spiral feeding shaft 18, conveying Effect is more preferable, and internal diameter is greater than the screw diameter of spiral feeding shaft 18, and convenient for the rotation of spiral feeding shaft 18, it is more reasonable to design, Feeding device 9 is equipped with far from the top of 5 side of main body blows material blower 11, and feeding device 9 is opened at the top of 5 side of main body Equipped with conveying mouth 20,20 inside of conveying mouth is equipped with micromotor 19 close to the side of feeding device 9, and micromotor 19 is defeated Outlet is fixed with by shaft smashes axis 21, micromotor 19, model can be WK16GRMOTOR, the original of the lower section of feeding device 9 Material is equipped with flitch 17 in room 4, and the bottom end of flitch 17 is uniformly fixed with compressed spring 16, and the side of flitch 17 is and feed chamber 4 inner wall fits, and the top structure in a concave shape design of flitch 17, fits and designs avoidable raw material and drop down under flitch 17 It causes to waste in the gap of side, and the design of concave shape structure enables raw material to be deposited among flitch 17, charging dress of being more convenient for 9 work are set, the middle position at 9 top of feeding device is equipped with first motor 13, and the inside of feeding device 9 is equipped with spiral Feeding shaft 18, the model of first motor 13 can be Y90L-2, and the output end of first motor 13 passes through shaft and spiral feeding shaft 18 Connection, main body 5 is uniformly equipped with suction blower 12 far from the top of 4 side of feed chamber, and the middle position at 5 end of main body opens up There is feed inlet 22,5 top of main body of 22 top of feed inlet offers round fixing groove 44, and the two sides inside round fixing groove 44 It is mounted on clamping plate 45, clamping plate 45 is flexibly connected by screw rod with the round composition of fixing groove 44, and clamping plate 45 is close to vacuum material The side of bucket 14 is arc-shaped, is flexibly connected design so that the clamping elasticity of clamping plate 45 is adjustable, using more convenient, and arc Design is more bonded with the shape of vacuum hopper 14, and the stability of clamping is higher, and the inside of round fixing groove 44 is equipped with vacuum material Bucket 14, and the output end of vacuum hopper 14 is connect with feed inlet 22, the side on 5 top of main body offers rectangular fixing groove 43, and The inside of rectangular fixing groove 43 is equipped with suction feeder 15, and the input terminal of suction feeder 15 is connect with vacuum hopper 14, main Middle position inside body 5 is equipped with paddy collection bucket 23, and is provided with inside the main body 5 of 23 two sides of paddy collection bucket miscellaneous Matter collection bucket 24, paddy collection bucket 23 and impurity collection bucket 24 are in cone, and the maximum inner diameter of paddy collection bucket 23 is miscellaneous Twice of 24 maximum inner diameter of matter collection bucket, conical design are more convenient for the collection of impurity and cereal, and cereal quantity is far more than impurity Quantity, therefore twice of internal diameter design is more reasonable, the bottom end of impurity collection bucket 24 is mounted on guide through slot 32, and guide through slot 32 It is connect with the second impurities outlet 7, screening plant 25, and screening plant 25 is installed in the main body 5 of 23 lower section of paddy collection bucket The both ends of two sides are mounted on fixed column 28, and fixed column 28 is connect with main body 5, and consolidating between screening plant 25 and main body 5 Buffer spring 27 is mounted on fixed column 28, fixed column 28 is designed in C-shaped structure, and fixed column 28 passes through bolt and main body 5 Between constitute Demountable design, C-shaped structure design so that fixed column 28 will not be separated with screening plant 25, using more Safety, and Demountable designs so that fixed column 28 is detachable, therefore screening plant 25 can be removed and be cleaned and be safeguarded, It is more reasonable to design, and the middle position inside screening plant 25 is oblique to be fixed with the first sieve 26, and 25 inner bottom of screening plant Hold it is diagonally-installed have the second sieve 29, the screen-aperture of the first sieve 26 is greater than the screen-aperture of the second sieve 29, and the first sieve The inclined direction of net 26 and the second sieve 29 is on the contrary, inclined direction contradictory design makes third impurities outlet 8 and collecting box 36 can To be provided with the both ends of main body 5, the separate collection of be more convenient for cereal and impurity, it is more reasonable to design, and the first sieve 26 is compared with downside The first hose 33 is fixed on screening plant 25, and the first hose 33 is connected with third impurities outlet 8, the second sieve 29 is lower The second hose 35 is fixed on the screening plant 25 of side, and screening plant 25 is connected by the second hose 35 with collecting box 36, The top of collecting box 36 is equipped with passage 34, and the top of passage 34 is connect with the input terminal of vacuum hopper 14, screening dress The both ends for setting 25 two sides of the bottom, which are all evenly arranged with, limits tooth 30, and the two sides limited inside 30 lower body 5 of tooth are mounted on Fixed frame 31,31 top of fixed frame is mounted on damping base 41 close to the side of main body 5, and 31 top of fixed frame is far from main body 5 side passes through bracket and is equipped with gear 39, and the top of damping base 41 is respectively and fixedly provided with the second motor 42, and the second motor 42 Output end be respectively and fixedly provided with the fluted disc 40 mutually ratcheting with gear 39, the model of the second motor 42 can be Y90S-2, the two of gear 39 End is fixed with transmission fluted disc 38 by shaft, and transmission fluted disc 38 is mutually ratcheting with restriction tooth 30, and transmission fluted disc 38 is in three points One of disc-shaped design, and be driven the surface of fluted disc 38 in the design of frosted shape structure, one third disc-shaped design makes device After the rotation of transmission fluted disc 38 of side drives screening plant 25 to move to left, screening plant 25 resets under the action of buffer spring 27, It is moved to right under the action of the transmission fluted disc 38 of the other side again, bilateral reciprocation is done with this, convenient for being screened to cereal, and is ground The design of sand shape structure can increase transmission fluted disc 38 and limit the frictional force between tooth 30, so that transmission fluted disc 38 and the company for limiting tooth 30 It connects more stable, is not susceptible to slip, the safety used is higher.

Working principle: in use, powering on, raw material to be separated being added in feed chamber 4 first, makees in the rough gravity of paddy Under, compressed spring 16 is compressed, and flitch 17 is pressed down, and first motor 13 works, and spiral feeding shaft 18 is driven to rotate, and raw material exists Moved up under the action of spiral feeding shaft 18 along feeding device 9, and blow material blower 11 under the action of by conveying mouth 20 into Enter main body 5 and carry out separation screening, while micromotor 19 works, drive is smashed the rotation of axis 21 and broken up to cereal, and paddy is avoided Object agglomeration influences selection by winnowing, and then suction blower 12 works, and carries out preliminary selection by winnowing to raw material, and stone isodensity specific gravity is biggish, It is directly dropped down under the action of gravity in the impurity collection bucket 24 of 20 side of conveying mouth, and lighter husk dust is then in gravity Wind-force effect with suction blower 12 is fallen in the impurity collection bucket 24 far from 20 side of conveying mouth, and impurity is along guide through slot 32 are discharged by the second impurities outlet 7, and cereal then enters in paddy collection bucket 23 and drops down on screening plant 25, in cereal compared with Big impurity is stopped by the first sieve 26, and is discharged through the first hose 33 by third impurities outlet 8, and lesser impurity then passes through Second sieve 29 is discharged by the first impurities outlet 3, and cereal is fallen into collecting box 36 through the second hose 35, then in vacuum intake Enter vacuum hopper 14 under the suction of machine 15, and main body 5 is entered by feed inlet 22, carries out postsearch screening, it will be in cereal Impurity eliminates completely, more thorough in cleaning.

It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims

1. a kind of grain rough separating screen screening device, including bottom plate (2), feed chamber (4), main body (5), feeding device (9), screening plant (25) and collecting box (36), it is characterised in that: four corners of bottom plate (2) bottom end are mounted on heel brace (1), and bottom plate (2) side at the top of is fixed with feed chamber (4), and the other side at the top of the bottom plate (2) is equipped with main body (5), and main body (5) is remote Bottom end from feed chamber (4) side is provided with the first impurities outlet (3), is fixed at the top of the bottom plate (2) of described main body (5) one end Collecting box (36), and collecting box (36) offers out the mouth of a valley (37) far from the bottom of main body (5) one end, the main body (5) is separate The middle position of collecting box (36) one end is equipped with control panel (10), and is pacified in the main body (5) below control panel (10) Equipped with door body (6), the middle position of the door body (6) is equipped with third impurities outlet (8), and the top of door body (6) two sides It offering the second impurities outlet (7), the main body (5) is equipped with feeding device (9) close to the side of feed chamber (4), and into The bottom of material device (9) is located at the inside of feed chamber (4), and the feeding device (9) is equipped with far from the top of main body (5) side Material blower (11) is blown, and feeding device (9) offers conveying mouth (20), the conveying mouth at the top of main body (5) side (20) the internal side close to feeding device (9) is equipped with micromotor (19), and the output end of micromotor (19) is by turning Axis, which is fixed with, to be smashed axis (21), is equipped with flitch (17) in the feed chamber (4) below the feeding device (9), and flitch (17) Bottom end be uniformly fixed with compressed spring (16), the middle position at the top of the feeding device (9) is equipped with first motor (13), and the inside of feeding device (9) is equipped with spiral feeding shaft (18), and the output end of first motor (13) passes through shaft and spiral shell Feeding shaft (18) connection is revolved, the main body (5) is uniformly equipped with suction blower (12) far from the top of feed chamber (4) side, and The middle position at main body (5) end offers feed inlet (22), and main body (5) top above the feed inlet (22) offers circle Shape fixing groove (44), and the two sides of round fixing groove (44) inside are mounted on clamping plate (45), the circle fixing groove (44) Inside is equipped with vacuum hopper (14), and the output end of vacuum hopper (14) is connect with feed inlet (22), main body (5) top Side offer rectangular fixing groove (43), and the inside of rectangular fixing groove (43) is equipped with suction feeder (15), and vacuum is inhaled The input terminal of material machine (15) is connect with vacuum hopper (14), and the internal middle position of the main body (5) is equipped with paddy collection It struggles against (23), and is provided with impurity collection bucket (24) inside the main body (5) of paddy collection bucket (23) two sides, the impurity collection bucket (24) bottom end is mounted on guide through slot (32), and guide through slot (32) is connect with the second impurities outlet (7), the paddy It is equipped with screening plant (25) in main body (5) below collection bucket (23), and the both ends of screening plant (25) two sides are mounted on Fixed column (28), the fixed column (28) connect with main body (5), and the fixed column between screening plant (25) and main body (5) (28) it is mounted on buffer spring (27), the internal middle position of the screening plant (25) is oblique to be fixed with the first sieve (26), and screening plant (25) inner bottom is diagonally-installed has the second sieve (29), sieve of first sieve (26) compared with downside It is fixed on screening device (25) the first hose (33), and the first hose (33) is connected with third impurities outlet (8), described second Sieve (29) on the screening plant (25) of downside compared with being fixed with the second hose (35), and screening plant (25) passes through the second hose (35) it is connected with collecting box (36), is equipped with passage (34) at the top of the collecting box (36), and the top of passage (34) End is connect with the input terminal of vacuum hopper (14), and the both ends of screening plant (25) two sides of the bottom are all evenly arranged with restriction tooth (30), and two sides of restriction tooth (30) lower body (5) inside are mounted on fixed frame (31), are leaned at the top of the fixed frame (31) The side of nearly main body (5) is mounted on damping base (41), and the side at the top of fixed frame (31) far from main body (5) passes through branch Frame is equipped with gear (39), and the top of the damping base (41) is respectively and fixedly provided with the second motor (42), and the second motor (42) Output end is respectively and fixedly provided with the fluted disc (40) mutually ratcheting with gear (39), and the both ends of the gear (39) pass through shaft and are fixed with biography Active toothed disk (38), and it is mutually ratcheting with restriction tooth (30) to be driven fluted disc (38).

2. a kind of grain rough separating screen screening device according to claim 1, it is characterised in that: the bottom of the main body (5) is embedding Enter the inside of bottom plate (2), and the bottom end of main body (5) inside is inclined to set.

3. a kind of grain rough separating screen screening device according to claim 1, it is characterised in that: the feeding device (9) is in circle Column structure design, and the internal diameter of feeding device (9) is greater than the screw diameter of spiral feeding shaft (18).

4. a kind of grain rough separating screen screening device according to claim 1, it is characterised in that: the side of the flitch (17) is equal It fits with the inner wall of feed chamber (4), and the top structure design in a concave shape of flitch (17).

5. a kind of grain rough separating screen screening device according to claim 1, it is characterised in that: the paddy collection bucket (23) with Impurity collection bucket (24) is in cone, and the maximum inner diameter of paddy collection bucket (23) is impurity collection bucket (24) maximum inner diameter two Times.

6. a kind of grain rough separating screen screening device according to claim 1, it is characterised in that: the sieve of first sieve (26) Hole aperture is greater than the screen-aperture of the second sieve (29), and the inclined direction of the first sieve (26) and the second sieve (29) is opposite.

7. a kind of grain rough separating screen screening device according to claim 1, it is characterised in that: the fixed column (28) is in C word The design of shape structure, and fixed column (28) passes through composition Demountable design between bolt and main body (5).

8. a kind of grain rough separating screen screening device according to claim 1, it is characterised in that: the transmission fluted disc (38) is in three / mono- disc-shaped design, and the surface for being driven fluted disc (38) is designed in frosted shape structure.

9. a kind of grain rough separating screen screening device according to claim 1, it is characterised in that: the clamping plate (45) passes through spiral shell Bar is constituted with round fixing groove (44) and is flexibly connected, and clamping plate (45) is arc-shaped close to the side of vacuum hopper (14).