CN115945389B

CN115945389B - Raw grain cleaning screen

Info

Publication number: CN115945389B
Application number: CN202310244333.8A
Authority: CN
Inventors: 郑莹莹; 杨忠军; 张继莹; 陈风超; 刘晓; 武传鹏
Original assignee: Shandong Jinzhong Technology Group Co ltd
Current assignee: Shandong Jinzhong Technology Group Co ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-06-02
Anticipated expiration: 2043-03-15
Also published as: CN115945389A

Abstract

The invention discloses a raw grain cleaning sieve, which comprises a frame body, wherein a rotary drum and a driving mechanism in transmission connection with the rotary drum are rotationally connected on the frame body, the peripheral wall of the rotary drum is provided with a first sieve hole, the end part of the rotary drum is provided with a trash outlet, the trash outlet is connected with a trash outlet pipe, the trash outlet pipe is arranged above the sieve body, and the bottom wall of the trash outlet pipe is provided with a third sieve hole; the frame body is also movably connected with a vibrating screen, the vibrating screen is arranged below the rotary drum and provided with an opening facing the rotary drum, the vibrating screen is provided with a second sieve hole and provided with a discharge hole, and the vibrating screen is connected with a rotary vibrating mechanism in a driving way. The technical scheme of the invention solves the technical problem that the existing grain sieve is difficult to meet the requirement of large treatment capacity and high efficiency.

Description

Raw grain cleaning screen

Technical Field

The invention relates to the technical field of grain treatment, in particular to a raw grain cleaning sieve.

Background

With the improvement of the mechanization and automation degree of agricultural production, the production efficiency of the raw grain in the planting and harvesting stages is greatly improved, and the high requirements on the treatment efficiency and the quality of the harvested raw grains are also provided. Because the raw grain contains a large amount of impurities, if the treatment is not good, the grain can generate heat and mould, and economic loss is caused, so that the impurity removal work before the raw grain is put in storage is particularly important.

The existing market is generally cleaned by a roller or a vibrating screen, however, the roller rotates through the roller to remove impurities from raw grains in a single batch, the yield is high, but the cleaning effect on small impurities is poor, the vibrating screen uses an exciting motor as a vibrating source, the vibrating frequency is high, and a good cleaning effect can be achieved, however, the vibration amplitude is limited, so that the treatment efficiency is low, and at present, no good equipment can meet the requirement of high treatment capacity on the premise of ensuring the cleaning effect.

Disclosure of Invention

The invention mainly aims to provide a raw grain cleaning sieve, and aims to solve the technical problem that the existing grain cleaning sieve is difficult to meet the requirements of large treatment capacity and high efficiency.

In order to achieve the above purpose, the invention provides a raw grain cleaning screen, comprising:

a frame;

the periphery of the roller is provided with first sieve holes, the roller is rotationally connected with the frame body, the end part of the roller is provided with a trash outlet, and the roller is obliquely arranged towards the trash outlet;

the driving mechanism is arranged on the frame body and is in transmission connection with the rotary drum to drive the rotary drum to rotate;

the vibrating screen is arranged below the rotary drum, is provided with an opening facing the rotary drum, is provided with a second sieve pore, the aperture of the second sieve pore is smaller than that of the first sieve pore, is provided with a discharge port, and is movably connected with the frame body; and

the rotary vibration mechanism is in driving connection with the vibrating screen and drives the vibrating screen to do plane rotary vibration;

the impurity removing pipe is obliquely arranged above the vibrating screen, one end of the impurity removing pipe is connected with the impurity removing port, the other end of the impurity removing pipe extends towards the outside of the frame body, a third sieve pore is formed in the bottom wall of the impurity removing pipe, and the third sieve pore is the same as the first sieve pore in size;

the raw grain to be screened enters the vibrating screen from the first sieve holes through the openings after being screened by the rotary drum, impurities in the rotary drum screen are discharged from the impurity discharging pipe, raw grain in the impurities is discharged into the vibrating screen from the third sieve holes, raw grain screened by the vibrating screen is discharged from the discharge opening, and impurities in the vibrating screen are discharged from the second sieve holes.

Optionally, the gyratory vibration mechanism includes:

the rotary vibration motor is fixedly arranged on the outer wall of the vibrating screen;

the eccentric block is rotationally connected to the outer wall of the vibrating screen, the mass center of the eccentric block deviates from the rotation axis of the eccentric block, and the rotary vibration motor is in transmission connection with the eccentric block to drive the eccentric block to rotate.

Optionally, the cross section of the eccentric block is circular, an eccentric hole is formed in the end face of the eccentric block, and the eccentric hole is formed in one side of the rotation axis of the eccentric block; and/or

The rotary vibration motor is connected with the eccentric block through a belt or a chain.

Optionally, the raw grain cleaning screen comprises a connecting arm, two ends of the connecting arm are connected with the frame body and the vibrating screen through cross universal joints, and the vibrating screen is suspended on the frame body through the connecting arm.

Optionally, two rollers are arranged in parallel and at intervals; the impurity removing pipes are arranged in two, and the two impurity removing pipes are respectively connected with the impurity removing ports of the two rolling barrels.

Optionally, the raw grain cleaning screen comprises:

the cyclone separator is arranged on the frame body and is provided with an air inlet which is positioned at one side of the discharge hole;

the pulse dust collector is arranged on the frame body and is communicated with air flow in the cyclone separator; and

the fan is arranged in the frame body and communicated with the air flow in the pulse dust collector so as to discharge the air flow of the pulse dust collector and the cyclone separator from an air outlet of the pulse dust collector;

one end of the dust removing pipe is connected with the air outlet of the fan, the other end of the dust removing pipe extends towards the direction of the vibrating screen, and the vibrating screen, the rotary drum and the cyclone separator are respectively communicated with the impurity discharging pipe so as to discharge impurities into the impurity discharging pipe;

the collecting box is arranged at the other end of the dust removing pipe;

wherein the raw grains are discharged from the discharge port through the bran removing treatment of the cyclone separator and the dust collecting treatment of the pulse dust collector, and the small impurity port

And impurities discharged by the impurity discharging pipe are discharged into the collecting box through the dust removing pipe.

Optionally, the raw grain cleaning screen comprises:

the driving bridge is arranged at the bottom of the frame body and horizontally connected with the frame body in a rotating mode, and is connected with a transmission shaft in a rotating mode, and the transmission shaft is connected with wheels in a transmission mode;

the driven bridge is fixedly arranged at the bottom of the frame body and is arranged at intervals with the driving bridge, and the driven bridge is rotationally connected with wheels;

the travelling mechanism is arranged on the driving bridge and is in transmission connection with the transmission shaft to drive the transmission shaft to rotate; and

the steering mechanism is arranged on the driving bridge and is in transmission connection with the frame body so as to drive the driving bridge to rotate relative to the frame body.

Optionally, the travelling mechanism includes:

the walking motor is fixedly arranged on the driving bridge, and a motor shaft of the walking motor is connected with a first driving wheel;

the second driving wheel is fixedly arranged on the driving shaft, and the first driving wheel is in driving connection with the second driving wheel to drive the driving shaft to rotate.

Optionally, the steering mechanism includes:

the slewing bearing comprises a fixed end and a rotating end, wherein the fixed end is connected with the frame body, the rotating end is connected with the driving bridge, and driven teeth are arranged on the peripheral wall of the fixed end;

the steering motor is fixedly arranged on the driving axle, a motor shaft of the steering motor is connected with a steering gear, and the steering gear is meshed with the driven teeth to drive the driving axle to rotate relative to the frame body.

Optionally, the frame body is provided with a traction frame, the steering gear is detachably connected with a motor shaft of the steering motor, and the first driving wheel is detachably connected with the motor shaft of the walking motor.

Compared with the prior art, in the technical scheme of the invention, the raw grain cleaning sieve comprises a frame body, wherein the frame body is placed on the ground, a roller is arranged on the frame body, the roller is rotatably connected to the frame body, a driving mechanism is further arranged on the frame body, the driving mechanism is in transmission connection with the roller so as to drive the roller to rotate, the peripheral wall of the roller is provided with first sieve holes, when raw grains enter the roller, the roller drives the internal raw grains to rotate through rotation, the raw grains smaller than the aperture are discharged from the first sieve holes, and large-size impurities larger than the first sieve holes remain in the roller, so that coarse sieving of the raw grains is realized; in order to facilitate the discharge of large-size impurities, the end part of one side of the drum is provided with a impurity discharge port, and the drum is inclined towards one side of the impurity discharge port, when the drum rotates, the large-size impurities in the drum slide to the impurity discharge port under the action of gravity and are discharged from the impurity discharge port, so that the large-size impurities in the drum are discharged. In addition, the frame body is also provided with a vibrating screen, the vibrating screen is arranged below the rotary drum and is movably connected with the frame body, one side of the vibrating screen, which faces the rotary drum, is provided with an opening, so that when raw grains are discharged from the first sieve holes, the vibrating screen can receive the raw grains, and the vibrating screen is also provided with a second sieve hole and a discharge hole; in order to realize the screening function of the vibrating screen, the vibrating screen is connected with a driving mechanism, and the vibrating screen can be driven to do plane rotation vibration through the driving of the driving mechanism, so that after raw grain enters the vibrating screen, the vibrating screen is driven to do plane rotation vibration, raw grain is driven to move in the vibrating screen, small-size impurities smaller than second sieve holes are discharged from the second sieve holes, and then raw grain is discharged from a discharge hole, so that the fine screen of raw grain is realized, compared with the vibrating screen driven by a common exciting motor, the vibrating screen can be vibrated to a large extent, raw grain can be fully screened in the vibrating screen, the screening effect is improved, in addition, raw grain can be rapidly moved to the discharge hole for discharge after screening, and the screening efficiency is also improved. In addition, this ration clearance sieve still is equipped with the trash-discharging pipe, this trash-discharging pipe locates between rotary drum and the shale shaker, the trash-discharging mouth department in the rotary drum is connected to the one end of trash-discharging pipe, the other end extends to the outside of framework, offer the third sieve mesh on this trash-discharging pipe's the diapire, this third sieve pore size is the same with the first sieve pore of rotary drum, in the rotary drum roll, some ration is perhaps not in time discharged from first sieve mesh, it will follow impurity discharge from the trash-discharging mouth of rotary drum, discharge into the trash-discharging pipe in, because the third sieve mesh has been seted up to trash-discharging pipe bottom, the raw grain doped in the impurity can fall into the shale shaker of below from this third sieve mesh, and impurity will be discharged from the trash-discharging pipe. In the technical scheme, the two-stage screening of the roller and the vibrating screen is realized, so that the removal of large impurities and small impurities in the raw grains is realized, the screening effect of the raw grains is improved, the roller and the vibrating screen can work simultaneously, and the screening efficiency is also improved; in addition, through the arrangement of the impurity discharging pipe, the interception of the raw grain which is leaked in the large impurity screening can be realized, so that the raw grain waste in the screening process is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a ration cleaning screen of the present invention;

FIG. 2 is a partial cross-sectional view at A in FIG. 1;

FIG. 3 is a partial cross-sectional view at B in FIG. 1;

FIG. 4 is a schematic side view of an embodiment of a ration cleaning screen of the present invention;

FIG. 5 is a schematic view of the structure of an active bridge of an embodiment of the grain cleaning screen of the present invention;

FIG. 6 is a schematic view of the eccentric mass of an embodiment of the grain cleaning screen of the present invention.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The raw grain is generally subjected to screening operation before being stored and warehoused, so that large impurities and small impurities in the raw grain are removed, and deterioration of the raw grain in the storage process is prevented. The existing screening is mainly carried out through a cylindrical screen or a vibrating screen, the single cleaning amount of the cylindrical screen is large, the screening effect is poor, small impurities are difficult to screen out, and the cleaning effect of the vibrating screen is good, but the efficiency is low.

In order to solve the above problems, the present invention provides a raw grain cleaning screen, comprising:

a frame 10;

the drum 20, the peripheral wall of the drum 20 offers the first sieve mesh, the drum 20 rotates and connects to the frame 10, the end of the drum offers the impurity outlet, and the drum 20 is set up towards the impurity outlet slope;

the driving mechanism 30 is arranged on the frame body 10, and the driving mechanism 30 is in transmission connection with the drum 20 to drive the drum 20 to rotate;

the vibrating screen 40 is arranged below the drum 20, the vibrating screen 40 is provided with an opening facing the drum 20, the vibrating screen 40 is provided with a second sieve pore, the aperture of the second sieve pore is smaller than that of the first sieve pore, the vibrating screen 40 is provided with a discharge hole, and the vibrating screen 40 is movably connected with the frame body 10;

the rotary vibration mechanism 50 is in driving connection with the vibrating screen 40, and the rotary vibration mechanism 50 drives the vibrating screen 40 to do plane rotary vibration;

the impurity discharging pipe 140 is obliquely arranged above the vibrating screen, one end of the impurity discharging pipe 140 is connected with the impurity discharging port, the other end extends towards the outside of the frame body 10, and a third sieve pore is formed in the bottom wall of the impurity discharging pipe 140 and has the same size as the first sieve pore;

wherein, after the raw grain to be screened is screened by the rotary drum 20, the raw grain enters the vibrating screen 40 from the first sieve holes through the openings, impurities in the rotary drum 20 are discharged from the impurity discharging pipe 140, the raw grain in the impurities is discharged into the vibrating screen 40 from the third sieve holes, the raw grain screened by the vibrating screen 40 is discharged from the discharge hole, and the impurities in the vibrating screen are discharged from the second sieve holes.

Compared with the prior art, in the technical scheme of the invention, the raw grain cleaning sieve comprises a frame body, wherein the frame body can be placed on the ground or a travelling mechanism, a roller is arranged on the frame body, the roller is rotatably connected to the frame body, a driving mechanism is further arranged on the frame body, the driving mechanism is in transmission connection with the roller so as to drive the roller to rotate, the peripheral wall of the roller is provided with a first sieve pore, when raw grains enter the roller, the roller drives the raw grains inside to rotate through rotation, the raw grains smaller than the aperture are discharged from the first sieve pore, and large-size impurities larger than the first sieve pore are still remained in the roller, so that the raw grain coarse sieve is realized; in order to facilitate the discharge of large-sized impurities, the end of one side of the drum 20 is provided with a impurity discharge port, and the drum 20 is inclined towards one side of the impurity discharge port, when the drum 20 rotates, the large-sized impurities in the drum 20 slide to the impurity discharge port under the action of gravity and are discharged from the impurity discharge port, thereby realizing the discharge of the large-sized impurities in the drum 20. In addition, the frame body is also provided with a vibrating screen, the vibrating screen is arranged below the rotary drum and is movably connected with the frame body, one side of the vibrating screen, which faces the rotary drum, is provided with an opening, so that when raw grains are discharged from the first sieve holes, the vibrating screen can receive the raw grains, and the vibrating screen is also provided with a second sieve hole and a discharge hole; in order to realize the screening function of the vibrating screen, the vibrating screen is connected with a driving mechanism, and the vibrating screen can be driven to do plane rotation vibration through the driving of the driving mechanism, so that after raw grain enters the vibrating screen, the vibrating screen is driven to do plane rotation vibration, raw grain is driven to move in the vibrating screen, small-size impurities smaller than second sieve holes are discharged from the second sieve holes, and then raw grain is discharged from a discharge hole, so that the fine screen of raw grain is realized, compared with the vibrating screen driven by a common exciting motor, the vibrating screen can be vibrated to a large extent, raw grain can be fully screened in the vibrating screen, the screening effect is improved, in addition, raw grain can be rapidly moved to the discharge hole for discharge after screening, and the screening efficiency is also improved. In addition, the raw grain cleaning sieve is further provided with a trash discharging pipe 140, the trash discharging pipe 140 is arranged between the drum 20 and the vibrating screen 40, one end of the trash discharging pipe 140 is connected to the trash discharging port of the drum 20, the other end extends to the outside of the frame body, a third sieve hole is formed in the bottom wall of the trash discharging pipe 140, the size of the third sieve hole is the same as that of the first sieve hole of the drum 20, during the rolling of the drum 20, part of raw grains possibly are not timely discharged from the first sieve hole, the trash discharging port of the drum 20 is discharged along with the trash, and the trash is discharged into the trash discharging pipe 140, and as the third sieve hole is formed in the bottom of the trash discharging pipe 140, the raw grains doped in the trash can fall into the vibrating screen 40 below from the third sieve hole, and the trash is discharged from the trash discharging pipe 140. In the technical scheme, the two-stage screening of the roller and the vibrating screen is realized, so that the removal of large impurities and small impurities in the raw grains is realized, the screening effect of the raw grains is improved, the roller and the vibrating screen can work simultaneously, and the screening efficiency is also improved; in addition, through the arrangement of the impurity discharging pipe 140, the interception of the raw grain of the leaked sieve in the process of large impurity screening can be realized, so that the waste of the raw grain in the screening process is reduced.

Specifically, as shown in fig. 1, the raw grain cleaning sieve comprises a frame 10, wherein the frame 10 is arranged on the ground and is used for supporting other functional components; the frame 10 is provided with a drum 20, the drum 20 is rotatably connected to the frame 10, in this embodiment, a rotating shaft can be arranged on one side end surface of the drum 20 and is rotatably connected to the frame 10 through the rotating shaft, two supporting frames can be arranged below the other side of the drum 20 on the frame 10 at intervals, the end parts of the supporting frames are rotatably connected with supporting wheels, the rotating axes of the supporting wheels can be parallel to the rotating axes of the drum 20, the peripheral wall of the drum 20 is in contact with the two supporting wheels, so that the two supporting wheels can support the bottom of the drum 20, and the drum 20 can rotate together with the two supporting wheels, so that the relative rotation between the drum 20 and the frame 10 is realized; in order to realize the screening function of the drum 20, the side wall of the drum 20 may be provided with a first screen hole, wherein the size of the first screen hole may be slightly larger than that of the raw grain, so that when the raw grain enters the drum 20, the raw grain inside the drum 20 may be driven to move together by the rotation of the drum 20, and when the raw grain moves to the first screen hole, the raw grain may flow out from the first screen hole, and the large impurities larger than the first screen hole size may remain in the drum 20, thereby realizing the separation of the raw grain from the large impurities; in order to improve the screening efficiency of the drum 20, the first screen holes may be provided in plurality at the peripheral wall of the drum 20; in order to facilitate the discharge of large impurities, the drum 20 is arranged obliquely, wherein the raw grains enter the drum 20 from the high side of the drum 20, and after being screened by the drum 20, the large impurities move to the low side of the drum 20 under the action of gravity, so that the low side of the drum is provided with a impurity discharge port, and the large impurities can be discharged from the drum 20, thereby preventing the first sieve holes from being blocked by accumulation of the large impurities in the drum 20; in order to realize the rotation of the drum 20, a driving mechanism 30 may be disposed on the frame 10 to drive the drum 20, in this embodiment, a driving motor and a cross universal joint may be disposed on the frame 10, wherein a yoke on one side of the cross universal joint may be connected with a rotating shaft of the drum 20, and a yoke on the other side may be in transmission connection with the driving motor through a belt or a chain, so that the driving motor drives the universal joint to rotate, and thus the drum 20 may be driven to rotate. In order to realize fine screening of the raw grain, a vibrating screen 40 can be arranged on the frame 10, wherein the vibrating screen 40 can be arranged below the drum 20, the vibrating screen 40 can be a box body with an open top, the box body can be movably connected with the frame 10, for example, a rubber damper or a spring damper can be connected with the frame 10, so that the vibrating screen 40 can conveniently perform a certain range of positions relative to the frame 10, a screen is embedded in the box body, the screen can be spaced from the bottom of the box body, a second screen mesh is arranged on the screen, and the size of the second screen mesh is smaller than that of the raw grain; in addition, in order to realize the screening function of the vibrating screen 40, the vibrating screen 40 can be provided with a rotary vibrating mechanism 50, the rotary vibrating mechanism 50 can be a motor with an eccentric block 52 connected with a motor shaft, and the rotary vibrating screen is driven to perform plane rotary vibration through the motion of the rotary vibrating mechanism 50, so that when raw grains flow out of the rotary drum 20, the raw grains can be received by the vibrating screen 40 below, and the raw grains are driven to move on the screen mesh of the vibrating screen 40 through plane rotary vibration of the vibrating screen 40, small impurities smaller than the second screen mesh can fall from the second screen mesh, and the raw grains can be continuously stored on the screen mesh, so that the small impurities in the raw grains are screened out; in order to facilitate the collection of the screened raw grains, a discharge hole can be formed in the box body of the vibrating screen 40, the discharge hole can be formed in the side wall of the box body and positioned above the screen, so that the raw grains move to the side wall of the box body due to centrifugal action when vibrating along with the vibrating screen 40 in a plane rotary mode, and are discharged from the discharge hole, and the collection of the raw grains is realized; in order to facilitate the collection of the small impurities, a small impurity port can be formed in the bottom of the box body of the vibrating screen 40, and the small impurities falling into the bottom of the box body can be discharged from the small impurity port, so that the collection of the small impurities is facilitated; in order to improve the screening effect of the vibrating screen 40, the vibrating screen 40 can be obliquely arranged, a discharge hole and small miscellaneous thirst are formed in the low-position end of the box body of the vibrating screen 40, and the screen mesh of the vibrating screen 40 can be spread over the second screen mesh, so that the vibrating screen 40 performs plane rotary vibration, raw grains are in a rotary projection advancing state on the screen mesh of the vibrating screen 40, and high relative movement speed can be generated between the raw grains and the screen mesh, so that stone grains or incomplete grains smaller than the second gap can smoothly pass through the screen mesh, and the screening effect of the vibrating screen 40 is improved. In addition, the raw grain cleaning screen is further provided with a trash discharging pipe 140, the trash discharging pipe 140 is arranged below one end of the trash discharging port of the drum 20, the lower part of the trash discharging pipe 140 is opposite to the vibrating screen 40, one end of the trash discharging pipe 140 is connected with the trash discharging port of the drum 20, so that when large trash in the drum 20 is discharged from the trash discharging port, the large trash can fall into the trash discharging pipe 140 and is discharged through the trash discharging pipe 140, in order to ensure trash discharging efficiency, the trash discharging pipe 140 can extend from the other end in the drum 20 to the outside of the frame body, and is inclined from the side close to the trash discharging port to the side far away from the trash discharging port, and the large trash can be smoothly discharged in the trash discharging pipe 140 under the action of gravity; in order to reduce the waste of the raw grains in the screening process, the bottom wall of the impurity discharging pipe 140 may be provided with a third sieve hole, the size of the third sieve hole may be the same as that of the first sieve hole of the drum 20, during the rolling of the drum 20, part of the raw grains may not be timely discharged from the first sieve hole of the drum 20, the impurity is discharged from the impurity discharging port of the drum 20 to the impurity discharging pipe 140 along with the impurity, during the sliding of the impurity from the impurity discharging pipe 140, the raw grains smaller than the third sieve hole leak out from the third sieve hole, fall into the vibrating sieve 40 below the impurity discharging pipe 140 to perform fine sieving, and the large impurities in the impurities continue to slide down from the impurity discharging pipe 140 and finally are discharged from the other end of the impurity discharging pipe 140, so that the secondary screening of the impurities discharged from the drum 20 is realized, thereby reducing the waste of the raw grains in the screening process and reducing the production cost.

Further, the whirling mechanism 50 includes:

the rotary vibration motor 51 is fixedly arranged on the outer wall of the vibrating screen 40;

the eccentric block 52 is rotatably connected to the outer wall of the vibrating screen 40, the center of mass of the eccentric block 52 deviates from the rotation axis of the eccentric block, and the rotary vibration motor 51 is in transmission connection with the eccentric block 52 to drive the eccentric block 52 to rotate.

Specifically, as shown in fig. 1 and 3, the rotary vibration mechanism 50 includes a rotary vibration motor 51 and an eccentric block 52, wherein the rotary vibration motor 51 is fixedly connected to the outer wall of the vibration screen 40, in this embodiment, a support frame is arranged at the bottom of the rotary vibration screen, and the rotary vibration motor 51 is fixedly arranged on the support frame; the eccentric block 52 is also disposed on the outer wall of the vibrating screen 40, in this embodiment, a connecting frame spaced from the supporting frame is disposed at the bottom of the vibrating screen 40, the eccentric block 52 is rotatably connected to the connecting frame, the rotation axis of the eccentric block 52 may be in a vertical direction, and the center of mass of the eccentric block 52 is deviated from the rotation axis thereof, so that when the eccentric block 52 rotates, the eccentric block 52 can apply a radial eccentric force to the supporting shaft due to the deviation of the center of mass from the rotation axis; in order to reduce the friction between the eccentric block 52 and the supporting shaft, a bearing can be sleeved on the supporting shaft, and the eccentric block 52 is connected to the bearing; in addition, the rotary vibration motor 51 and the eccentric block 52 may be connected by a belt or other transmission means to drive the eccentric block 52 to rotate. When the rotary vibration motor 51 drives the eccentric block 52 to rotate, the eccentric block 52 applies an eccentric force to the support shaft in the horizontal direction, the eccentric force is directed to the mass center direction of the eccentric block 52 by the support shaft, the direction of the eccentric force periodically changes in the horizontal direction along with the rotation of the eccentric block 52, and the support shaft is subjected to the eccentric force to perform periodic rotary motion in the horizontal direction and drive the vibrating screen 40 to perform periodic rotary motion, so that the screening function of the vibrating screen 40 is realized.

Further, the cross section of the eccentric block 52 is circular, an eccentric hole is formed in the end face of the eccentric block 52, and the eccentric hole is formed in one side of the rotation axis of the eccentric block 52; and/or

The rotary vibration motor 51 is connected with the eccentric block 52 through a belt or a chain.

Specifically, as shown in fig. 3 and 6, in order to simplify the structure of the rotary vibration mechanism 50, the eccentric block 52 may be a circular plate-shaped structural member with a circular cross section, an eccentric hole may be formed on an end surface of the eccentric block 52, the eccentric hole deviates from the center position of the cross section of the eccentric block 52, the size and shape of the eccentric hole may be adjusted according to the vibration performance requirement of the vibration screen 40, and the thickness of the eccentric block 52 may also be adaptively adjusted; in order to facilitate the installation of the eccentric block 52, the center of the two end surfaces of the eccentric block 52 can be provided with a central shaft, a connecting hole is correspondingly formed in the connecting frame, the central shaft is matched and connected with the side wall of the hole through a bearing, and the eccentric block 52 and the connecting frame can be rotationally connected through shaft hole matching. In addition, because the cross section of the eccentric block 52 is circular, and the rotation axis is located at the center, the rotary vibration motor 51 can be directly matched with the side wall of the eccentric block 52 through a belt or a chain, so that the transmission connection between the belt or the chain is realized, and the rotary vibration motor has the advantage of simple structure.

Further, the raw grain cleaning screen comprises a connecting arm 60, two ends of the connecting arm 60 are connected with the frame body 10 and the vibrating screen 40 through cross universal joints, and the vibrating screen 40 is suspended on the frame body 10 through the connecting arm 60.

Specifically, as shown in fig. 1, in order to further improve the screening effect of the vibrating screen 40, the vibrating screen 40 may be movably connected with the frame 10 through a connecting arm 60, wherein, two opposite ends of the connecting arm 60 are connected with cross-shaft type universal joints for respectively connecting the frame 10 and the vibrating screen 40, that is, the vibrating screen 40 can perform a larger displacement on a plane relative to the frame 10, which is equivalent to improving the amplitude of the vibrating screen 40, thereby improving the screening effect thereof; in addition, in order to ensure the stability of the movement of the vibrating screen 40, four connecting arms 60 may be provided and connected to the peripheral wall of the screen body at uniform intervals, and the supporting of the four connecting arms 60 may improve the connection strength between the vibrating screen 40 and the frame 10, and also ensure the stability of the vibration of the vibrating screen 40.

Further, the device is characterized in that two drums 20 are arranged, the two drums 20 are arranged in parallel at intervals, two impurity discharging pipes 140 are arranged, and the two impurity discharging pipes 140 are respectively connected with impurity discharging ports of the two drums 20. Specifically, as shown in fig. 2, in order to further increase the throughput of the raw grain cleaning sieve, two drums 20 may be provided, two drums 20 may be disposed above the vibrating sieve 40 at a parallel interval, and the two drums 20 may be driven by two driving mechanisms 30 respectively to ensure the stability of the respective operations; in this way, the two drums 20 are arranged to screen the raw grains at the same time, so that the treatment efficiency of the raw grain cleaning screen is improved; in addition, the two impurity discharging pipes 140 may be correspondingly disposed, and the two impurity discharging pipes 140 respectively correspond to the impurity discharging ports of the two drums 20, so that the two impurity discharging pipes 140 simultaneously screen impurities for the second time, thereby improving the working efficiency of the device.

Further, the raw grain cleaning screen comprises:

the cyclone separator 70 is arranged on the frame body 10, the cyclone separator 70 is provided with an air inlet, and the air inlet is positioned on one side of the discharge hole;

a pulse dust collector 80 provided in the frame 10, the pulse dust collector 80 being in communication with the airflow in the cyclone separator 70; and

a fan 90 provided in the frame 10, the fan 90 being in communication with the airflow in the impulse cleaner 80 to discharge the airflow from the impulse cleaner 80 and the cyclone 70;

the dust removing pipe 150, one end of which is connected with the air outlet of the fan, and the other end of which extends towards the direction of the vibrating screen, the vibrating screen 40, the rotary drum 20 and the cyclone separator 70 are respectively communicated with the dust removing pipe 150 so as to discharge impurities into the dust removing pipe 150;

a collecting box 160 provided at the other end of the dust removing pipe 150;

wherein, the raw grain is subjected to bran removal treatment by a cyclone separator 70 and dust collection treatment by a pulse dust collector 80, discharged from a discharge port, and the impurities discharged from a small impurity port and a impurity discharge pipe are discharged into a collection box 160 through a dust removal pipe 150.

In order to further improve the treatment effect of wheat bran dust and the like in the raw grain, as shown in fig. 1, a bran removing device and a dust collecting device can be arranged, wherein the bran removing device can be a cyclone separator 70, the cyclone separator 70 is provided with an air inlet and an air outlet, wherein the air inlet can be connected with an air suction pipe, one end of the air suction pipe is connected with the air inlet, and the other end of the air suction pipe can be connected with a discharge hole, for example, the bran removing device can be arranged above the discharge hole; the dust collection device may be a pulse dust collector 80, and the pulse dust collector 80 is provided with an air inlet and an air outlet, wherein the air inlet can be communicated with the air outlet of the cyclone separator 70 to realize the communication of air flow inside two devices, the air outlet can be connected with a fan 90, and the air flow in the cyclone separator 70 and the pulse dust collector 80 is extracted through the fan 90 to generate negative pressure in the two devices. Thus, when the raw grain is discharged from the discharge port, wheat bran and dust in the raw grain can enter the cyclone separator 70 through the air suction pipe, wherein the wheat bran is separated from the air flow and deposited to the bottom of the cyclone separator 70, and a closed air discharger can be arranged at the bottom of the cyclone separator 70 for discharging heavier impurities such as the wheat bran; dust can flow into the pulse dust collector 80 along with the air flow, dust in dust-containing gas can be blocked by a cloth bag of the pulse dust collector 80, the dust can fall to the bottom of the pulse dust collector 80 and be transported out through equipment such as a closed air auger and the like, and clean gas is discharged through an air outlet of the negative pressure fan 90. In the technical scheme, bran removal and dust removal treatment of raw grains can be realized through the arrangement of the cyclone separator 70 and the pulse dust collector 80, so that impurities in the raw grains are further reduced, and in addition, after larger impurities are treated through the cyclone separator 70, the impurity treatment capacity in the pulse dust collector 80 can be reduced, thereby slowing down the blocking speed of a cloth bag in the pulse dust collector 80 and prolonging the continuous working time of the pulse dust collector 80. In addition, in order to collect the impurity discharged by the raw grain cleaning sieve, the fan is further connected with a dust removing pipe 150, one end of the dust removing pipe 150 is connected with an air outlet of the fan, the other end extends towards the direction of the vibrating sieve, the end part of the dust removing pipe is blocked with dust absorbing materials such as polyester cloth, one side close to the end part is communicated with a collecting box 160, in addition, a wind closing discharger at the bottom of the cyclone separator 70 can be communicated with the dust removing pipe 150, and a small impurity opening and a impurity discharging pipe of the vibrating sieve are respectively communicated with the tail end of the dust removing pipe 150 to form a three-way structure, so that the air flow discharged by the fan is discharged from the end part provided with the dust absorbing materials through the dust removing pipe 150, and the impurities discharged by the wind closing discharger, the small impurity opening of the vibrating sieve and the impurity discharging pipe can move to the end part provided with the dust absorbing materials and are blocked by the dust absorbing materials and finally fall into a collecting box 160 at one side, thereby realizing the collection of the impurities, improving the environmental protection level of the product and reducing the working strength of the equipment operators.

Further, the raw grain cleaning screen comprises:

the driving axle 100 is arranged at the bottom of the frame body 10, the driving axle 100 is horizontally and rotatably connected with the frame body 10, the driving axle 100 is rotatably connected with a transmission shaft, and the transmission shaft is in transmission connection with wheels;

the driven axle 110 is fixedly arranged at the bottom of the frame body 10 and is arranged at intervals from the driving axle 100, and the driven axle 110 is rotationally connected with wheels;

the travelling mechanism 120 is arranged on the driving axle 100, and the travelling mechanism 120 is in transmission connection with the transmission shaft to drive the transmission shaft to rotate; and

the steering mechanism 130 is arranged on the driving axle 100, and the steering mechanism 130 is in transmission connection with the frame 10 so as to drive the driving axle 100 to rotate relative to the frame 10.

Specifically, in order to facilitate the flexible transition of the raw grain cleaning sieve during practical application, the raw grain cleaning sieve may be provided with a travelling device, as shown in fig. 1, a frame 10 of the raw grain cleaning sieve may be provided with a driving bridge 100 and a driven bridge 110, the driving bridge 100 and the driven bridge 110 may be disposed at intervals at the bottom of the frame 10, and wheels are rotatably connected to the driving bridge 100 and the driven bridge 110, in this embodiment, the opposite ends of the driving bridge 100 and the driven bridge 110 are respectively connected to wheels, that is, the frame 10 is supported on the ground by four wheels, and the movement of the position of the raw grain cleaning sieve is realized by the rotation of the wheels relative to the driving bridge 100 and the driven bridge 110; in order to realize self-walking of equipment, a walking mechanism 120 can be arranged on the driving axle 100, wherein the structure of the driving axle 100 can be the same as that of a rear axle of a vehicle in the prior art, namely, a transmission shaft is rotationally connected to the driving axle 100, wheels are in transmission connection with two ends of the transmission shaft, the wheels are rotated relative to the driving axle 100 through rotation of the transmission shaft, the walking mechanism 120 can be in transmission connection with the transmission shaft, and rotation of the wheels is realized through driving of the walking mechanism 120, so that a self-walking function of a raw grain cleaning sieve is realized; in order to realize the steering in the movement of the raw grain cleaning screen, the driving axle 100 can be horizontally and rotatably connected to the frame 10, and the driving axle 100 can be provided with a steering mechanism 130, wherein the steering mechanism 130 and the frame 10 can be connected in a meshed transmission mode, and the steering mechanism 130 and the frame 10 are transmitted to drive the driving axle 100 to rotate relative to the frame 10, so that the steering function is realized.

Further, the traveling mechanism 120 includes:

the walking motor 121 is fixedly arranged on the driving axle 100, and a motor shaft of the walking motor 121 is connected with a first driving wheel;

the second driving wheel 122 is fixedly arranged on the driving shaft, and the first driving wheel is in driving connection with the second driving wheel 122 to drive the driving shaft to rotate.

Specifically, as shown in fig. 5, in this embodiment, the travelling mechanism 120 includes a travelling motor 121, the travelling motor 121 is fixedly disposed on an outer wall of the driving axle 100, a first driving wheel may be disposed on a motor shaft of the travelling motor 121, and in addition, a second driving wheel 122 is fixedly disposed on a driving shaft, and the first driving wheel and the second driving wheel 122 may be in transmission connection through a chain or a belt, so that the first driving wheel may be driven to rotate by rotation of the travelling motor 121, and then power is transmitted to the second driving wheel 122, so as to realize rotation of wheels, thereby realizing self-walking of the raw grain cleaning screen. In this technical scheme, provide power by the motor, drive the wheel through chain or belt transmission's mode and rotate, have simple structure, maintain convenient advantage.

Further, the steering mechanism 130 includes:

the slewing bearing 131 comprises a fixed end and a rotating end, wherein the fixed end is connected with the frame body 10, the rotating end is connected with the driving bridge 100, and driven teeth are arranged on the peripheral wall of the fixed end;

the steering motor 132 is fixedly arranged on the driving axle 100, a motor shaft of the steering motor 132 is connected with a steering gear, and the steering gear is meshed with the driven teeth to drive the driving axle 100 to rotate relative to the frame 10.

Specifically, as shown in fig. 2, in this embodiment, the driving axle 100 may be connected to the frame 10 through a swivel bearing 131, the swivel bearing 131 includes a fixed end and a rotating end, the fixed end is connected to the frame 10, the rotating end is connected to the driving axle 100, the peripheral wall of the fixed end is provided with driven teeth, in addition, the outer wall of the driving axle 100 may be fixedly provided with a steering motor 132, a motor shaft of the steering motor 132 may vertically extend upwards, and a motor shaft of the steering motor 132 is connected with a steering gear, and the steering gear is meshed with the driven teeth, so, when the motor shaft drives the steering gear to rotate, the steering motor 132 will rotate around the swivel bearing 131 due to the fixed end being in a fixed state, thereby driving the driving axle 100 to rotate relative to the frame 10, so as to realize steering of the grain cleaning screen.

Further, the frame 10 is provided with a traction frame, the steering gear is detachably connected with the motor shaft of the steering motor 132, the first driving wheel is detachably connected with the motor shaft of the traveling motor 121, in particular, in order to facilitate long-distance dragging of the raw grain cleaning screen, the steering gear, the first driving wheel and the motor shaft can be designed to be detachable, when traveling for a short distance, the requirement can be met without using a traction vehicle through the traveling mechanism 120 and the steering mechanism 130, when long-distance transition is needed, the traction vehicle is connected through the traction frame after the first driving wheel and the steering gear are detached, so that traction movement of the traction vehicle is realized, and the transition efficiency is improved.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A ration cleaning screen, comprising:

a frame;

the vibrating screen is arranged below the rotary drum, the vibrating screen is provided with an opening facing the rotary drum, the vibrating screen is provided with a second sieve pore, the aperture of the second sieve pore is smaller than that of the first sieve pore, the vibrating screen is provided with a discharge port, the bottom of the vibrating screen is provided with a small impurity port, and the vibrating screen is movably connected with the frame body;

the rotary vibration mechanism is in driving connection with the vibrating screen and drives the vibrating screen to do plane rotary vibration, the rotary vibration mechanism comprises a rotary vibration motor and an eccentric block, the rotary vibration motor is fixedly arranged on the outer wall of the vibrating screen, the eccentric block is rotationally connected with the outer wall of the vibrating screen, the mass center of the eccentric block deviates from the rotation axis of the eccentric block, the rotary vibration motor is in driving connection with the eccentric block to drive the eccentric block to rotate, the cross section of the eccentric block is circular, an eccentric hole is formed in the end face of the eccentric block, the rotation axis of the eccentric block is in a vertical direction, and the eccentric hole is formed in one side of the rotation axis of the eccentric block;

the cyclone separator is arranged on the frame body and is provided with an air inlet, the air inlet is positioned on one side of the discharge hole, and the bottom of the cyclone separator is provided with a closed air discharger;

the pulse dust collector is arranged on the frame body and communicated with air flow in the cyclone separator, a cloth bag is arranged in the pulse dust collector, and a closed air auger is arranged at the bottom of the pulse dust collector; and

the fan is arranged in the frame body and communicated with the air flow in the pulse dust collector so as to discharge the air flow of the pulse dust collector and the cyclone separator from the air outlet of the pulse dust collector and generate negative pressure in the pulse dust collector and the cyclone separator;

the dust removing pipe is connected with the air outlet of the fan at one end, the other end extends towards the direction of the vibrating screen, the small impurity port and the impurity removing pipe are respectively communicated with the tail end of the dust removing pipe to form a three-way structure so as to discharge impurities into the dust removing pipe, the air-blocking discharger is communicated with the dust removing pipe, and dust collecting materials are blocked at the end part of the dust removing pipe;

the collecting box is arranged at the other end of the dust removing pipe;

the raw grain to be screened enters the vibrating screen from the first sieve holes through the openings after being screened by the rotary drum, impurities in the rotary drum screen are discharged from the impurity discharging pipe, raw grain in the impurities is discharged into the vibrating screen from the third sieve holes, raw grain after being screened by the vibrating screen is discharged from the discharge port, impurities in the vibrating screen are discharged from the small impurity port, when raw grain is discharged from the discharge port, wheat bran and dust in the raw grain enter the cyclone separator through the air inlet, the wheat bran is separated and deposited to the bottom of the cyclone separator and discharged through the air blocking discharger, the dust flows into the pulse dust collector along with the air flow, the cloth bag blocks the dust to fall to the bottom of the pulse dust collector and is discharged through the air blocking auger, the air is discharged through the negative pressure air discharging discharger, and the dust and the impurity discharging pipe and the impurity discharging hopper are arranged at the end part of the dust collecting pipe.

2. The grain cleaning screen of claim 1, wherein the whirl motor is connected to the eccentric mass by a belt or chain.

3. The grain cleaning screen of claim 1, wherein the grain cleaning screen comprises a connecting arm, two ends of the connecting arm are connected with the frame body and the vibrating screen through cross universal joints, and the vibrating screen is suspended on the frame body through the connecting arm.

4. The grain cleaning screen of claim 1, wherein two of the drums are arranged in parallel and spaced apart relation; the impurity removing pipes are arranged in two, and the two impurity removing pipes are respectively connected with the impurity removing ports of the two rolling barrels.

5. The raw grain cleaning screen of claim 1, wherein the raw grain cleaning screen comprises:

6. The raw grain cleaning screen of claim 5, wherein the travelling mechanism comprises:

7. The raw grain cleaning screen of claim 6, wherein the steering mechanism comprises:

8. The grain cleaning screen of claim 7, wherein the frame is provided with a traction frame, the steering gear is detachably connected with a motor shaft of the steering motor, and the first driving wheel is detachably connected with the motor shaft of the walking motor.