CN216800514U - Grain separation fine screening machine - Google Patents

Abstract

The utility model relates to a grain separating and fine screening machine, and belongs to the technical field of agricultural machinery. The grain separating and fine screening machine comprises a fine screening machine body, a rotary drum and a material distributing hopper; the fine screening machine body is cylindrical; the rotary drum is rotatably arranged in the fine screening machine body, a plurality of distributing grooves are uniformly distributed on the inner surface of the rotary drum, and the sections of the distributing grooves are J-shaped along the direction opposite to the rotation direction of the rotary drum; the material distribution hopper is arranged in the rotary drum and is internally provided with a spiral feeder, and the top end of the material distribution hopper is close to the upper half part of the rotary drum. According to the grain separation fine screening machine provided by the utility model, the closed cavity is formed in the fine screening machine body, the rotary drum can rotate, and in the rotating process, materials can enter the material distribution groove, and different materials can fall off at different positions due to different shapes and sizes of the materials, so that different materials can be separated, and the grain separation fine screening machine is simple and convenient to operate, and time-saving and labor-saving.

Description

Grain separation fine screening machine

Technical Field

The utility model belongs to the technical field of agricultural machinery, and particularly relates to a grain separation fine screening machine.

Background

In the agricultural production process, part of grains need to be hulled, hulled materials, unhulled materials and hull materials can be generated after passing through a huller, the three materials need to be separated, the hulled materials can be sold, eaten and the like, the unhulled materials need to be hulled again, and the hull materials can be used for preparing feed and other purposes.

After husking grains in the prior art, a fan is usually used for removing husks, however, husked substances and unhulled substances are subjected to fine screening and classification, and then the unhulled substances are subjected to husking again, so that the fine screening and classification mode in the prior art is complex, and time and labor are wasted.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the embodiments of the present invention is to provide a grain separating and fine screening machine, which can perform fine screening and classification on materials, and is simple and convenient to operate, time-saving and labor-saving.

The embodiment of the utility model is realized by the following steps:

the embodiment of the utility model provides a grain separation fine screening machine which comprises a fine screening machine body, a rotary drum and a material distribution hopper; the fine screening machine body is cylindrical; the rotary drum is rotatably arranged in the fine screening machine body, a plurality of material distributing grooves are uniformly distributed on the inner surface of the rotary drum, and the section of each material distributing groove is J-shaped along the direction opposite to the rotation direction of the rotary drum; the material distribution hopper is arranged in the rotary drum, a spiral feeder is arranged in the material distribution hopper, and the top end of the material distribution hopper is close to the upper half part of the rotary drum.

As an alternative to the above embodiment, the drum comprises a frame member having a cylindrical frame structure and having a plurality of splicing portions, and a plurality of first splicing members detachably provided to the splicing portions, and the material dividing groove is provided to an inner surface of the first splicing members.

As an alternative of the above embodiment, the drum includes a cylindrical part and a replacement part, the cylindrical part has a plurality of circular truncated cone-shaped material distribution through holes uniformly distributed thereon, the replacement part is detachably coated on the outer side of the cylindrical part and is formed by splicing a plurality of second splicing parts, a plurality of circular truncated cone-shaped embedded islands are uniformly distributed on the inner surface of the second splicing parts, the material distribution groove is disposed on the embedded island, the embedded island is embedded in the material distribution through hole and the embedded island are adsorbed by magnetic adsorption, and the material distribution groove is disposed on the inner surface of the embedded island.

As an alternative to the above embodiment, the outer surface of the distribution hopper is provided with at least two speed channels, the openings of which are located above the middle of the drum, the bottom surfaces of which are arranged obliquely downwards in the travelling direction of the grains, and the openings of which are located upstream of the openings of the distribution hopper.

As an alternative to the above embodiment, the bottom of the distribution hopper is provided with a plurality of propelling plates at intervals, the propelling plates are adjacent to the inner surface of the rotary drum, and the propelling plates extend along the spiral direction to propel the materials at the bottom of the rotary drum to advance.

As an alternative to the above embodiment, the grain separating fine screening machine further includes an adjusting member, the material separating hopper is rotatably disposed in the fine screening machine body around a center line of the screw feeder, and the adjusting member is connected to the material separating hopper through a worm and gear mechanism.

As an alternative to the above embodiment, a vibrating member is disposed in the fine screening machine body, and the vibrating member is located outside the rotary drum and can intermittently strike the rotary drum.

As an alternative of the above embodiment, the two ends of the fine screening machine body are provided with fixing seats, the fixing seats are provided with two groups of annular rotating grooves, sliding seats are arranged in the annular rotating grooves, the fine screening machine body comprises two closed cylinders in the shape of a semi-cylinder, one side of each closed cylinder is rotatably connected with the sliding seats, and the other side of each closed cylinder is detachably connected with the sliding seats.

As an alternative of the above embodiment, the two ends of the fine screening machine body are respectively provided with a traveling assembly and two semicircular fixing frames, the traveling assembly comprises a lifting frame, a traveling frame and at least two coaxial traveling wheels, the lifting frame is arranged on the fine screening machine body in a lifting manner along the fixing frames, the traveling wheels are rotatably arranged on the traveling frame, and the two traveling frames of the traveling assembly are rotatably arranged on the corresponding lifting frames, so that an included angle between the advancing direction of the traveling assembly and the central line of the fine screening machine body is adjustable.

When walking subassembly is in the walking state, the central line of walking frame is by last to the internal contraction down, be provided with buffer assembly on the crane, buffer assembly includes cylinder, piston and check valve, the cylinder is fixed in on the fine screen organism, piston slidable set up in the cylinder, the check valve set up in on the piston and make gaseous one-way flow, be provided with the pressure release hole on the check valve, the exhaust rate in pressure release hole is far less than the admission rate of check valve.

As an alternative of the above embodiment, at least one end of the fine screen body may be lifted and drive the fine screen body to incline.

The utility model has the beneficial effects that:

according to the grain separation fine screening machine provided by the utility model, the closed cavity is formed in the fine screening machine body, the rotary drum can rotate, and in the rotating process, materials can enter the material distribution groove, and different materials can fall off at different positions due to different shapes and sizes of the materials, so that different materials can be separated, and the grain separation fine screening machine is simple and convenient to operate, and time-saving and labor-saving.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the utility model.

FIG. 1 is a first schematic structural diagram of a grain separating and fine screening machine according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram II of a grain separating and fine screening machine provided by an embodiment of the utility model;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is an enlarged view of a portion C of FIG. 3;

FIG. 5 is a schematic view of the closure cartridge of FIG. 3 in an open state;

FIG. 6 is a partially enlarged view of portion D of FIG. 3;

FIG. 7 is a schematic view of a partial structure of a drum according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a distributing hopper provided in the embodiment of the present invention;

FIG. 9 is an enlarged view of part B of FIG. 1;

FIG. 10 is a third schematic structural view of a grain separating and fine screening machine according to an embodiment of the present invention;

FIG. 11 is a schematic over-bend view of a grain separating screen provided in accordance with an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a buffer assembly according to an embodiment of the present invention.

Icon:

20-grain separating and fine screening machine;

21-fine screening machine body; 22-a rotating drum; 23-a distributing hopper; 24-a walking assembly;

210-a fixed seat; 211-annular rotary groove; 212-a slide; 213-a closed cylinder; 214-a mount;

220-distributing grooves; 221-a frame piece; 222 — a first splice; 223-a compression member; 224-hold down bolts; 225-hold down spring; 226-a compact block;

230-screw feeder; 231-fast channel; 232-a propulsion plate; 233-an adjustment member;

240-a lifting frame; 241-a walking frame; 242-road wheels; 243-a buffer component; 244-cylinders; 245-a piston; 246-one-way valve; 247-relief hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 and 2, an embodiment of the present invention provides a grain separating and fine screening machine 20, wherein the grain separating and fine screening machine 20 is used for classifying different materials and enabling the different materials to enter different positions. This grain separation fine screening machine 20 both can sieve the different states of same cereal, also can sieve different cereals.

Referring to fig. 3, the grain separating and fine screening machine 20 includes a fine screening machine body 21, a rotary drum 22 and a material separating hopper 23.

The whole cylindrical that is of fine screen organism 21, form inclosed work interval in the fine screen organism 21, in this embodiment, fine screen organism 21 includes two closed cylinders 213, two closed cylinders 213 all are the semi-cylindrical, two diameters that close a cylinder 213 can be the same or have certain difference, in this embodiment, two closed cylinders 213 are first a section of thick bamboo and second a section of thick bamboo respectively, the diameter of first a section of thick bamboo slightly is greater than the diameter of a second section of thick bamboo, first a section of thick bamboo can rotate around the central line of fine screen organism 21 to make the work interval open.

In this embodiment, please refer to fig. 4, two sets of annular rotating grooves 211 are formed in the fixing seat 210, a sliding seat 212 is disposed in the annular rotating groove 211, the sliding seat 212 may be a whole or divided into two or more sliding blocks, one side of the sealing cylinder 213 is rotatably connected to the sliding seat 212, and the other side of the sealing cylinder 213 is detachably connected to the sliding seat 212, and a structure of the sealing cylinder 213 after being opened is please refer to fig. 5.

One end of the fine screen body 21 is provided with a lifting mechanism, the structure of the lifting mechanism is not limited, and the lifting mechanism can enable the fine screen body 21 to incline upwards.

Cleaning elements are provided in the fine screen body 21 and can be used to clean structures in the fine screen body 21, such as the drum 22, with water.

A feed inlet is arranged above one end of the fine screen body 21, and materials can enter the rotary drum 22 through the feed inlet.

The rotating drum 22 is cylindrical, the rotating drum 22 is rotatably disposed in the fine screen body 21, and a center line of the rotating drum 22 may coincide with a center line of the fine screen body 21.

Referring to fig. 6, a plurality of distributing grooves 220 are uniformly distributed on the inner surface of the rotating drum 22, the distributing grooves 220 are more in number, and generally need to be distributed on the inner surface of the rotating drum 22, and the cross section of the distributing grooves 220 is J-shaped along the direction opposite to the rotation direction of the rotating drum 22.

During rotation of the material in the drum 22, a portion of the material can enter the distribution groove 220. With the middle of the rotating drum 22 as a dividing line, the material can gradually fall off above the dividing line, and the material that does not enter the material distribution groove 220 can fall off below the dividing line.

The rotary drum 22 can be driven by a motor or the like, when the rotary drum 22 rotates, a part of the materials in the rotary drum 22 enter the distribution grooves 220, each distribution groove 220 can only enter one particle of the materials, the rotary drum 22 drives the materials to rotate, the materials which do not enter the distribution grooves 220 can not reach above a dividing line, and the materials which enter the distribution channel can reach above a decomposition line. When the materials in the material distributing groove 220 reach the decomposition line, the materials with small volume are positioned at the J-shaped bottom of the material distributing groove 220 due to different shapes and sizes of the materials, the parts of the longer materials positioned at the J-shaped bottom of the material distributing groove 220 are smaller, and different falling positions of the materials are different along with the rotation of the rotary drum 22, so that different materials can be collected at different positions.

Generally, each drum 22 can only be used for materials with specific size and shape due to the fixed size of the distributing groove 220, and the drum 22 is difficult to disassemble and has a narrow application range.

In this embodiment, the following two technical solutions are provided, which can effectively improve the problem:

in a first embodiment, referring to fig. 7, the drum 22 includes a frame member 221 and a plurality of first splicing members 222, the frame member 221 is a cylindrical frame structure and has a plurality of splicing portions, the first splicing members 222 are detachably disposed on the splicing portions, and the separating grooves 220 are disposed on the inner surface of the first splicing members 222.

In this embodiment, a plurality of pressing members 223 are disposed on the frame member 221, a plurality of pressing members 223 are disposed around each first splicing member 222, wherein each pressing member 223 includes a pressing bolt 224, a pressing spring 225 and a pressing block 226, a threaded hole is disposed on the frame body, the pressing bolt 224 is in threaded engagement with the threaded hole, the pressing block 226 is sleeved on the pressing bolt 224, the pressing block 226 can be contacted with the first splicing member 222 by rotating the pressing block 226, the pressing spring 225 is a compression spring, the pressing spring 225 is sleeved on the pressing bolt 224, two ends of the pressing spring 225 are respectively abutted against the pressing bolt 224 and the pressing block 226, and the pressing spring 225 can enable the pressing block 226 to be pressed on the first splicing member 222. The insertion depth of the pressing bolt 224 can be adjusted so that the elastic force of the pressing spring 225 is changed.

The second scheme, rotary drum 22 includes tube-shape spare and replacement, tube-shape spare evenly distributed has the branch material through-hole of a plurality of round platform form, the separable cladding of replacement forms in the outside of tube-shape spare and by the concatenation of a plurality of second splicers, the internal surface evenly distributed of second splice has the island of establishing of inlaying of a plurality of round platform form, divide material recess 220 to set up and establish on inlaying the island, inlay and establish the island and inlay and locate in dividing the material through-hole and the two adsorb through the magnetic adsorption effect, divide material recess 220 to set up in inlaying the internal surface of establishing the island.

The fine screen machine body 21 can be further provided with a vibrating part, the vibrating part is located on the outer side of the rotary drum 22 and can intermittently knock the rotary drum 22, so that the rotary drum 22 vibrates, and the materials in the material distribution grooves 220 are vibrated (only when the materials are cleaned, the materials are normally not in operation in the material distribution process).

Different materials fall out at different locations and can be collected using the distribution hopper 23 and the fast channel 231.

As shown in fig. 8, the distributing hopper 23 is disposed in the rotating drum 22, a lower half portion of the distributing hopper 23 may be cylindrical, an upper half portion of the distributing hopper 23 may be a flat plate, the screw feeder 230 is disposed inside the flat plate, a top end of the flat plate of the distributing hopper 23 is close to the upper half portion of the rotating drum 22, a gap between the flat plate and an inner surface of the rotating drum 22 is small, and the falling material can be accurately received.

Both ends of the distribution hopper 23 are closed by stoppers and can be transported to a predetermined position only by the screw feeder 230.

According to the different types of the materials, the falling height and position of the materials may also be changed to some extent, therefore, in this embodiment, the grain separating and fine screening machine 20 further includes an adjusting member 233, the material separating hopper 23 is rotatably disposed in the fine screening machine body 21 around the center line of the spiral feeder 230, the adjusting member 233 is connected with the material separating hopper 23 through a worm and gear mechanism, for example, the adjusting member 233 is a rotating disc, the adjusting member 233 is coaxially disposed with the worm, the worm is rotatably disposed on the fixing base 210, and the worm and the material separating hopper 23 are coaxially disposed, that is, the worm and the spiral feeder 230 are coaxially disposed. The adjusting member 233 can adjust the position of the flat top end of the material separating hopper 23 corresponding to the rotating drum 22, so that the material separating hopper 23 can accurately receive the material, and the material separating hopper 23 can be turned over, so that the material residue inside can be poured out.

The fast channels 231 are disposed on the outer surface of the material distribution hopper 23, the number of the fast channels 231 is not limited, for example, the number of the fast channels 231 is three, and the fast channels 231 only need to be disposed on one side of the material distribution hopper 23.

The opening of the rapid passage 231 is located above the middle of the drum 22, the bottom surface of the rapid passage 231 is arranged to be inclined downward in the traveling direction of the grains, and the opening of the rapid passage 231 is located upstream of the opening of the distribution hopper 23.

The material that is not conform to the settlement standard, for example the material that does not unshell drops in fast channel 231 to slide to the place ahead along the bottom surface of fast channel 231, can accelerate the material that has passed through the screening but is not conform to the condition and advance fast, reduce the screening time of this part material, be difficult to disturb the screening of not screening the material, so that other materials fully screen, effectively improve fine screen efficiency, labour saving and time saving.

A plurality of pusher plates 232 are spaced apart from the bottom of the dispensing hopper 23, the pusher plates 232 being adjacent the inner surface of the drum 22, the pusher plates 232 extending in a helical direction. The push plate 232 can push the material at the bottom of the bowl 22 forward, allowing the material to be screened during the forward process, preventing the material from accumulating at the inlet.

In addition, in this embodiment, the two ends of the fine screening machine body 21 are both provided with the traveling assembly 24 and two fixing frames 214, and the fixing members are semicircular.

Referring to fig. 9, the walking assembly 24 includes a crane 240, a walking frame 241 and at least two coaxial walking wheels 242.

The lifting frames 240 are arranged on the fine screen body 21 in a lifting way along the fixing frame 214, the walking wheels 242 are rotatably arranged on the walking frames 241, and the walking frames 241 of the two walking assemblies 24 are both rotatably arranged on the corresponding lifting frames 240, so that the included angle between the advancing direction of the walking assemblies 24 and the central line of the fine screen body 21 is adjustable.

With such arrangement, the grain separating and fine screening machine 20 can move in a narrow turning channel, the operation is simple and convenient, and the walking state is shown in fig. 11.

The walking assembly 24 has a walking state (see fig. 9) and a storage state (see fig. 10), that is, the walking assembly 24 has two stop points, when the walking assembly 24 is in the walking state, the walking wheel 242 is in contact with the ground, the fixing seat 210 is separated from the ground, the worker can drag the grain separating and fine screening machine 20 to move forward, when the walking assembly 24 is in the storage state, the fixing seat 210 is in contact with the ground, and the grain separating and fine screening machine 20 cannot move forward.

When walking subassembly 24 is in the walking state, the central line of walking frame 241 is by last to shrink inwards down, and when walking wheel 242 was all forward promptly, the central line slope of walking frame 241, the lower extreme is more close to the middle part of grain separation fine screen machine 20, when walking subassembly 24 was changed to accomodating the state by the walking state, the vertical face can be crossed to the central line of walking frame 241.

The lifting frame 240 is provided with a buffer assembly 243, and the buffer assembly 243 can make the descending process of the lifting frame 240 smooth and

referring to fig. 12, the buffering assembly 243 includes a cylinder 244, a piston 245 and a check valve 246, the cylinder 244 is fixed on the fine screen body 21, the piston 245 is slidably disposed in the cylinder 244, the check valve 246 is disposed on the piston 245 and enables gas to flow in a one-way manner, the check valve 246 is provided with a pressure relief hole 247, and an exhaust rate of the pressure relief hole 247 is much smaller than an intake rate of the check valve 246.

When the traveling unit 24 changes from the storage state to the traveling state, the check valve 246 opens, the piston 245 can slide smoothly, and the gas can enter the cylinder 244, so that the change is smooth. When the walking assembly 24 changes from the walking state to the storage state, the one-way valve 246 is closed, air can be exhausted only through the pressure relief hole 247, the piston 245 slides smoothly, the state change duration is longer, the fixed seat 210 can be ensured not to drop suddenly and be impacted, and the grain separating and fine screening machine 20 can be effectively protected.

The working flow of the grain separating and fine screening machine 20 provided by the embodiment of the utility model is as follows (materials comprise husked materials and shelled materials):

pouring the materials into the rotary drum 22 through a feeding port of the fine screen machine body 21, and accumulating the materials at the bottom of the rotary drum 22;

part of the materials enter the material distribution groove 220, and the rotary drum 22 rotates to drive the materials in the material distribution groove 220 and part of the materials outside to rotate;

before the materials reach the middle boundary line of the rotary drum 22, the materials outside the distribution groove 220 gradually fall off, and the materials inside the distribution groove 220 reach above the middle boundary line;

most of the shelled materials are positioned in the J-shaped bottom of the distributing groove 220 and are not easy to separate, and only a small part of the shelled materials are positioned in the J-shaped bottom of the distributing groove 220 due to the fact that the shelled materials are long and thick, so that the shelled materials are easy to separate and fall off, and the shelled materials fall into the distributing hopper 23 and the quick channel 231 respectively;

the shelled materials entering the branch hopper 23 advance and are discharged under the action of the screw feeder 230;

the shelled materials entering the quick channel 231 slide forward along the quick channel 231 and fall into the rotary drum 22, and in the process, the shelled materials advance for a large distance, so that the screening opportunity of the unscreened materials is not occupied, and the screening efficiency can be improved;

the materials which do not enter the separation grooves move forward under the action of the pushing plate 232, so that the materials can be screened while moving forward, and all the material distribution grooves 220 in the rotary drum 22 can be fully utilized.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A grain separating and fine screening machine is characterized by comprising a fine screening machine body, a rotary drum and a material distributing hopper; the fine screening machine body is cylindrical; the rotary drum is rotatably arranged in the fine screening machine body, a plurality of material distributing grooves are uniformly distributed on the inner surface of the rotary drum, and the section of each material distributing groove is J-shaped along the direction opposite to the rotation direction of the rotary drum; the material distribution hopper is arranged in the rotary drum, a spiral feeder is arranged in the material distribution hopper, and the top end of the material distribution hopper is close to the upper half part of the rotary drum.

2. The grain separating and fine screening machine of claim 1, wherein the drum includes a frame member having a cylindrical frame structure and a plurality of first splicing portions, the first splicing portions being detachably disposed on the splicing portions, and the dividing groove being disposed on an inner surface of the first splicing portions.

3. The grain separating and fine screening machine according to claim 1, wherein the drum includes a cylindrical part and a replacement part, the cylindrical part is uniformly distributed with a plurality of circular truncated cone-shaped material separating through holes, the replacement part is detachably coated on the outer side of the cylindrical part and is formed by splicing a plurality of second splicing parts, the inner surface of the second splicing parts is uniformly distributed with a plurality of circular truncated cone-shaped embedded islands, the material separating groove is arranged on the embedded islands, the embedded islands are embedded in the material separating through holes and are adsorbed by magnetic adsorption, and the material separating groove is arranged on the inner surface of the embedded islands.

4. The grain separating and fine screening machine of claim 1, wherein the outer surface of the distribution hopper is provided with at least two fast channels, the fast channels having openings located above the middle of the drum, the fast channels having bottom surfaces inclined downward in the traveling direction of the grains, the fast channels having openings located upstream of the openings of the distribution hopper.

5. The grain separating and fine screening machine of claim 1, wherein the bottom of said distribution hopper is spaced apart to provide a plurality of pusher plates adjacent to the inner surface of said drum, said pusher plates extending in a spiral direction to advance material at the bottom of said drum.

6. The grain separating and fine screening machine of claim 1, further comprising an adjustment member, wherein the material separating hopper is rotatably arranged in the fine screening machine body around a center line of the screw feeder, and the adjustment member is connected with the material separating hopper through a worm and gear mechanism.

7. The grain separating fine screen of claim 1, wherein a vibratory member is disposed within the fine screen body, the vibratory member being located outside the drum and capable of intermittently striking the drum.

8. The grain separating and fine screening machine according to claim 1, wherein the fine screening machine body is provided with fixing seats at both ends thereof, two sets of annular rotating grooves are formed in the fixing seats, sliding seats are arranged in the annular rotating grooves, the fine screening machine body comprises two closed cylinders in a semi-cylindrical shape, one side of each closed cylinder is rotatably connected with the sliding seat, and the other side of each closed cylinder is detachably connected with the sliding seat.

9. The grain separating and fine screening machine according to claim 1, wherein a traveling assembly and two semicircular fixing frames are arranged at two ends of the fine screening machine body, the traveling assembly comprises a lifting frame, a traveling frame and at least two coaxial traveling wheels, the lifting frame is arranged on the fine screening machine body in a lifting manner along the fixing frames, the traveling wheels are rotatably arranged on the traveling frame, and the traveling frames of the two traveling assemblies are rotatably arranged on the corresponding lifting frames, so that an included angle between the advancing direction of the traveling assembly and the central line of the fine screening machine body is adjustable;

when walking subassembly is in the walking state, the central line of walking frame is by last to the internal contraction down, be provided with buffer assembly on the crane, buffer assembly includes cylinder, piston and check valve, the cylinder is fixed in on the fine screen organism, piston slidable set up in the cylinder, the check valve set up in on the piston and make gaseous one-way flow, be provided with the pressure release hole on the check valve, the exhaust rate in pressure release hole is far less than the admission rate of check valve.

10. The grain separating fine screen of claim 1, wherein at least one end of the fine screen body is liftable and drives the fine screen body to incline.

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