CN108816757B

CN108816757B - Rice sieving mechanism

Info

Publication number: CN108816757B
Application number: CN201810385769.8A
Authority: CN
Inventors: 谭仕波
Original assignee: Guizhou Shennong Rice Industry Co ltd
Current assignee: Guizhou Shennong Rice Industry Co ltd
Priority date: 2018-04-26
Filing date: 2018-04-26
Publication date: 2021-07-13
Anticipated expiration: 2038-04-26
Also published as: CN108816757A

Abstract

The invention relates to the technical field of rice processing, and particularly discloses a rice screening device which comprises a rack, an outer frame barrel, an inner frame barrel and a rotating shaft, wherein the inner side of the outer frame barrel is rotatably connected with the inner frame barrel, the rotating shaft drives the inner frame barrel to rotate, the top of the outer frame barrel is provided with a feeding hole, the bottom of the outer frame barrel corresponding to the feeding hole is provided with a discharging hole, the inner frame barrel is hollow, the surface of the inner frame barrel is provided with a through hole, and the through hole is communicated with the; the end part of the inner frame barrel is hinged with a connecting rod, one end of the connecting rod is hinged with a fixing rod, the fixing rod is connected with a fixing block, an ash collecting groove is arranged below the outer frame barrel, the top of the ash collecting groove is open, a sieve plate is arranged on the ash collecting groove, the sieve plate extends out of the side wall of the ash collecting groove and is eccentrically hinged with the fixing block, meshes are arranged on the sieve plate, and bulges corresponding to the meshes are arranged at the bottom. This device can make the rice intermittent type ejection of compact to reciprocating rocking is carried out the rice, realizes abundant screening.

Description

Rice sieving mechanism

Technical Field

The invention relates to the technical field of rice processing, in particular to a rice screening device.

Background

The rice is formed by rolling the paddy, the rice bran is mixed in the rice, the rice bran refers to a brown layer part outside the coarse rice kernels removed in the process of processing the paddy into the rice, the components of the brown layer part are different, and the brown layer part consists of fruit peels, seed coats, bead cores and aleurone layers.

In the prior art, rice containing rice bran and crushed grains is directly poured into a sieve and is manually screened, so that the screening efficiency is not high, the method is not suitable for large-batch rice processing production, and the requirement of rapid production is influenced; however, at present, there is also a rice bran sieving device, which generally utilizes an exhaust fan to generate wind power to blow up impurities with lighter mass such as rice bran and the like to separate the impurities from rice, but the sieving device can not move, so that the rice is often piled on the sieving device to block meshes of the sieving device, and the wind power hardly blows the rice bran pressed by the rice and the crushed grains with lighter mass, thereby causing poor sieving effect of the rice.

Disclosure of Invention

The invention aims to provide a rice screening device which can intermittently discharge rice and shake the rice back and forth to realize full screening.

In order to achieve the purpose, the basic scheme of the invention is as follows:

the rice screening device comprises a rack, a rotating shaft arranged transversely, an outer frame barrel and an inner frame barrel, wherein the inner side of the outer frame barrel is rotatably connected with the inner frame barrel, the rotating shaft drives the inner frame barrel to rotate, a feeding hole is formed in the top of the outer frame barrel, a discharging hole is formed in the bottom of the outer frame barrel corresponding to the feeding hole, the inner frame barrel is hollow, a through hole is formed in the surface of the inner frame barrel, and the through hole is communicated with the feeding hole; the end part of the inner frame barrel is hinged with a connecting rod, one end of the connecting rod is hinged with a fixing rod, the fixing rod is connected with a fixing block, an ash collecting groove is arranged below the outer frame barrel, the top of the ash collecting groove is open, a sieve plate is arranged on the ash collecting groove, the sieve plate extends out of the side wall of the ash collecting groove and is eccentrically hinged with the fixing block, meshes are arranged on the sieve plate, and bulges corresponding to the meshes are arranged at the bottom.

The working principle of the basic scheme is as follows: rice is put into the inner frame cylinder from the feeding hole, the rotating shaft drives the inner frame cylinder to rotate, and the through holes in the inner frame cylinder are intermittently communicated with the discharging hole at the bottom of the outer frame cylinder, so that the rice intermittently falls onto the sieve plate of the ash collecting groove below the discharging hole; the connecting rod thereupon inside casing section of thick bamboo tip rotates, when the connecting rod promotes the dead lever, when the dead lever drives fixed block pushing down sieve one side, make the sieve opposite side shift up, when connecting rod pulling dead lever, the dead lever drives the fixed block and when upwards pulling sieve one side, make the sieve opposite side move down, realize rocking from top to bottom of sieve both sides, in the sieve reciprocates, the mesh on the sieve is passed to the arch of collection ash chute bottom portion, thereby stab the mesh of jam, impurity and the crushed grain in the confession rice pass through, thereby carry out abundant screening with the rice on the sieve.

The beneficial effect of this basic scheme lies in:

1. the motor is controlled to rotate the rotating shaft at a high speed, so that the rice in the inner frame cylinder cannot fall out of the discharge hole, the rice is fully dispersed in the inner frame cylinder, and the agglomeration phenomenon is avoided; when the motor is controlled to rotate slowly, the through holes of the inner frame cylinder are communicated with the discharge hole of the outer frame cylinder in a clearance mode, so that rice intermittently falls onto the sieve plate, and the situation that the rice is accumulated on the sieve plate at one time, the through holes on the sieve plate are blocked, and impurities and particles in the rice are not prone to falling into the ash collecting groove from the through holes is avoided;

2. the connecting rod is driven by the rotation of the inner frame cylinder, so that the two sides of the sieve plate are rocked up and down, the rice on the sieve plate is vibrated, impurities and broken grains in the rice fall into the ash collecting groove from the through holes on the sieve plate to be collected, and the full rice is screened;

3. in the sieve reciprocates, the mesh on the sieve is passed to the arch of collection ash chute bottom to stab the mesh of jam, make impurity and particle in the rice smoothly pass through the mesh, realize the abundant screening to the rice.

Further, the outer frame cylinder is fixed on the frame, the side wall of the outer frame cylinder is hollow, the rotating shaft penetrates through the inner frame cylinder, a cylindrical cam is arranged at one end of the rotating shaft, a cylinder corresponding to the cylindrical cam is arranged on the frame, a piston is arranged in the cylinder and connected with a piston rod, a guide pin inserted into a groove of the cylindrical cam is fixedly connected onto the piston rod, a first guide pipe and a first opening are arranged on one side of the cylinder, the first guide pipe is connected with a hot air blower, a second guide pipe is connected onto the hot air blower, the second guide pipe extends into the side wall of the outer frame cylinder, an air outlet one-way valve is arranged on the first guide pipe, when the piston moves towards the first guide pipe, the air outlet one-way valve is opened, air in the cylinder is discharged into the hot air blower, an air inlet one-way valve is arranged on.

The cylindrical cam rotates along with the rotating shaft, when the guide pin column drives the piston rod to push the piston along the groove, gas between the piston and the left side of the air cylinder is exhausted along the first guide pipe, and after the gas enters the hot air machine to be heated, the gas is exhausted into the inner wall of the outer frame cylinder along the second guide pipe, so that heat in the inner wall of the outer frame cylinder is conducted to the inner frame cylinder, and the rice in the inner frame cylinder is heated and dried; the first opening is provided with an air inlet one-way valve to prevent gas from being discharged from the first opening, so that the gas flow in the first guide pipe is reduced; the high-speed rotation of the inner frame barrel avoids the long-time contact between the rice and the wall of the inner frame barrel, so that the rice is heated uniformly, and the splitting of the rice is prevented. When the guide pin column drives the piston rod to pull the piston along the groove, the pressure of the piston and the left side of the cylinder is reduced, and the outside air is replenished with air through the first opening; the first conduit is provided with an air outlet one-way valve to prevent the air in the hot air blower from being sucked back to the air cylinder and then discharged into the hot air blower again for reheating, and the repeated reheating consumes electric energy to cause waste.

Furthermore, a third guide pipe and a second opening are arranged on the other side of the air cylinder, the opening end of the third guide pipe is located at the bottom of the outer frame cylinder, an air outlet one-way valve is arranged on the third guide pipe, when the piston moves towards the third guide pipe, the air outlet one-way valve is opened, air in the air cylinder is discharged along the third guide pipe, an air inlet one-way valve is arranged on the second opening, and when the piston is far away from the third guide pipe, external air enters.

When the guide pin post drives piston rod pulling piston along the recess, discharge piston and cylinder right side gas along the third pipe, because the open end of third pipe is located frame bobbin base portion, consequently blow to the rice that falls out from the discharge gate, because impurity and particle quality in the rice are lighter, can realize the first screening of rice along with the great distance of wind direction skew that blows. When the pressure on the right side of the piston and the cylinder is reduced, the open end of the third conduit is prevented from generating negative pressure to generate suction to impurities and particles, so that the external air is supplemented with air through the second opening; when the pressure on the right side of the piston and the cylinder is increased, gas is prevented from being discharged from the second opening, and the gas flow of the third guide pipe is dispersed.

Further, a collecting box corresponding to the open end of the third guide pipe is arranged at the bottom of the outer frame cylinder. The third pipe blows out gas and blows impurity and particle into the collecting box and collect, avoids causing the atmosphere to pollute.

Further, still include transport mechanism, transport mechanism includes the action wheel, from the driving wheel and overlap the belt of establishing between action wheel, follow driving wheel, the action wheel is fixed on the motor output shaft, fixes in the pivot from the driving wheel, installs the converter on the motor for the rotational speed of regulation motor.

The driving wheel rotates along with the output shaft of the motor, the driven wheel rotates under the driving of the belt, and then the rotating shaft drives the inner frame cylinder to rotate, wherein the rotating speed of the motor is adjusted through the frequency converter, and when rice is required to be dispersed and dried in the inner frame cylinder, the adjusting motor rotates at a high speed, so that the rice cannot fall out of the discharge hole; when the rice is required to be discharged from the discharge hole, the motor is adjusted to rotate at a low speed, so that the rice intermittently falls out from the discharge hole.

Drawings

FIG. 1 is a schematic view of an embodiment of a rice screening apparatus according to the present invention;

fig. 2 is a view from a in fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises an outer frame barrel 1, a feeding hole 11, a discharging hole 12, an inner frame barrel 2, a through hole 21, a connecting rod 22, a fixing rod 23, a rotating shaft 3, a cylindrical cam 31, a guide pin 32, a cylinder 4, a piston 41, a piston rod 42, a first guide pipe 43, a first opening 44, a third guide pipe 45, a second opening 46, a hot air blower 5, a second guide pipe 51, a motor 6, a driving wheel 61, a driven wheel 62, a belt 63, an ash collecting groove 7, a sieve plate 71, a protrusion 72 and a fixing block 73.

As shown in fig. 1 and 2, the rice sieving mechanism comprises a frame, an outer frame tube 1, an inner frame tube 2 and a rotating shaft 3 which is transversely arranged, wherein the outer frame tube 1 is fixed on the frame and is hollow in the side wall, the inner side of the outer frame tube 1 is rotatably connected with the inner frame tube 2, a feeding hole 11 is formed in the top of the outer frame tube 1, a discharging hole 12 is formed in the bottom of the outer frame tube 1 corresponding to the feeding hole 11, the inner frame tube 2 is hollow, a through hole 21 is formed in the surface of the inner frame tube 2, and the through hole 21 is communicated with.

The rotating shaft 3 penetrates through the inner frame barrel 2, the rotating shaft 3 positioned at the left side of the inner frame barrel 2 is provided with a cylindrical cam 31, the rotating shaft 3 positioned at the right side of the inner frame barrel 2 is provided with a conveying mechanism, the frame is provided with a cylinder 4 corresponding to the cylindrical cam 31, the cylinder 4 is internally provided with a piston 41, the piston 41 is connected with a piston rod 42, the piston rod 42 is fixedly connected with a guide pin 32 inserted into a groove of the cylindrical cam 31, the left side of the cylinder 4 is provided with a first guide pipe 43 and a first opening 44, the first guide pipe 43 is communicated with a hot air blower 5, the hot air blower 5 is connected with a second guide pipe 51, the second guide pipe 51 extends into the side wall of the outer frame barrel 1, the first guide pipe 43 is provided with an air outlet one-way valve, when the pressure between the piston 41 and the left side of the cylinder 4 is increased, the air in the cylinder 4 is discharged into the hot air blower 5, the, the air inlet one-way valve is opened, and external air enters; a third guide pipe 45 and a second opening 46 are arranged on the right side of the cylinder 4, an air outlet one-way valve is arranged on the third guide pipe 45, when the pressure intensity of the piston 41 and the right side of the cylinder 4 is increased, the air outlet one-way valve is opened, the air in the cylinder 4 is discharged along the third guide pipe 45, an air inlet one-way valve is arranged on the second opening 46, and when the pressure intensity of the piston 41 and the right side of the cylinder 4 is reduced, the external air enters; wherein, the open end of the third conduit 45 is positioned at the left side of the bottom of the outer frame tube 1 to blow the rice falling from the discharge port 12, and correspondingly, a collecting box is arranged at the right side of the bottom of the outer frame tube 1. The transmission mechanism comprises a driving wheel 61, a driven wheel 62 and a belt 63 sleeved between the driving wheel 61 and the driven wheel 62, the driving wheel 61 is fixed on an output shaft of the motor 6, the driven wheel 62 is fixed on the rotating shaft 3, and the motor 6 is provided with a frequency converter for adjusting the rotating speed of the motor 6.

The end of the inner frame cylinder 2 is hinged with a connecting rod 22, one end of the connecting rod 22 is hinged with a fixing rod 23, the fixing rod 23 is connected with a fixing block 73 to form a slider-crank mechanism, an ash collecting groove 7 is arranged below the outer frame cylinder 1, the top of the ash collecting groove 7 is open, a sieve plate 71 is arranged on the ash collecting groove 7, the sieve plate 71 extends out of the side wall of the ash collecting groove 7 to be eccentrically hinged with the fixing block 73, meshes are formed in the sieve plate 71, the diameter of the meshes is smaller than that of full rice, and bulges 72 corresponding to the meshes are.

The specific implementation process is as follows:

through-hole 21 on the frame section of thick bamboo 2 communicates with feed inlet 11 on the outer frame section of thick bamboo 1 in the adjustment, puts into the rice from feed inlet 11 on the outer frame section of thick bamboo 1, and the rice relies on feed inlet 11 and through-hole 21's intercommunication and falls into in the inner frame section of thick bamboo 2, and starter motor 6, action wheel 61 rotates clockwise along with motor 6 output shaft, follows clockwise rotation under the drive of belt 63 of driving wheel 62, and then pivot 3 drives the interior frame section of thick bamboo 2 and does clockwise rotation. During the rotation of the inner frame barrel 2, the through holes 21 on the inner frame barrel 2 are intermittently communicated with the discharge hole 12 at the bottom of the outer frame barrel 1, so that rice intermittently falls out of the discharge hole 12, the control motor 6 controls the rotating shaft 3 to rotate at a high speed, the rice in the inner frame barrel 2 cannot fall out of the discharge hole 12, and the rice is fully dispersed in the inner frame.

In the above process, because the cylindrical cam 31 can rotate along with the rotating shaft 3, when the guide pin 32 pushes the piston rod 42 to the left side along the groove, the piston rod 42 pushes the piston 41 to move to the left side, the gas on the left sides of the piston 41 and the cylinder 4 is discharged along the first conduit 43, the gas enters the air heater 5, after being heated by the air heater 5, the gas is discharged to the inner wall of the outer frame cylinder 1 along the second conduit 51, because the inner frame cylinder 2 is rotatably connected with the inner side of the outer frame cylinder 1, namely, the inner frame cylinder 2 is attached to the inner side of the outer frame cylinder 1, the heat in the inner wall of the outer frame cylinder 1 is conducted to the inner frame cylinder 2, and then the rice in the inner frame cylinder 2 is heated. At the moment, because the inner frame cylinder 2 rotates at a high speed, the rice is prevented from contacting the wall of the inner frame cylinder 2 with higher temperature for a long time, so that the rice is heated uniformly, the uniform drying of the rice is realized, and the phenomenon of splitting is prevented; when the guide pin 32 pulls the piston rod 42 to the right along the groove, the piston rod 42 pulls the piston 41 to the right, and the piston 41 and the gas on the right side of the cylinder 4 are exhausted along the third conduit 45. When the piston 41 moves to the left, the pressure between the piston 41 and the right side of the cylinder 4 decreases, the external air supplies the air to the right side of the piston 41 and the cylinder 4 through the second opening 46 on the cylinder 4, and when the piston 41 moves to the right, the pressure between the piston 41 and the left side of the cylinder 4 decreases, and the external air supplies the air to the left side of the piston 41 and the cylinder 4 through the first opening 44 on the cylinder 4.

After the rice in the interior frame section of thick bamboo 2 carries out the stoving of certain time, rotational speed through converter accommodate motor 6, make 3 rotational speeds of pivot reduce, when through-hole 21 on the interior frame section of thick bamboo 2 slowly rotated discharge gate 12 and discharge gate 12 intercommunication, the rice in the interior frame section of thick bamboo 2 could have the chance to fall out from discharge gate 12 this moment, on getting into below collection ash chute 7's sieve 71, with this interior frame section of thick bamboo 2 make the intermittent type of rice in it fall out from discharge gate 12 in slowly rotating, avoid the rice once only to gush into and pile up on the sieve 71, impurity and the grit in the messenger's rice are difficult for falling into collection ash chute 7 from the mesh of sieve 71. When the rice falls out of the discharge port 12, the gas discharged from the third duct 45 blows the rice to blow the impurities and particles with lighter weight mixed in the rice to the right, so that the impurities and particles enter the collection box arranged on the right side to realize the first screening of the rice.

When the connecting rod 22 rotates from the top to the bottom along with the end part of the inner frame barrel 2, the connecting rod 22 pushes the fixing rod 23 to move downwards, the fixing rod 23 drives the fixing block 73 to move downwards, and the fixing block 73 pushes one side of the sieve plate 71 to move downwards and the other side of the corresponding sieve plate 71 to move upwards due to the eccentric hinge joint of the fixing block 73 and the sieve plate 71; when the connecting rod 22 rotates from the bottom to the top along with the end part of the inner frame barrel 2, the connecting rod 22 pulls the fixing rod 23 to move upwards, the fixing rod 23 drives the fixing block 73 to move upwards, the sieve plate 71 on one pressed side moves upwards, the other side of the corresponding sieve plate 71 moves downwards, and therefore the two sides of the sieve plate 71 shake up and down, impurities and particles in rice on the sieve plate 71 fall into the ash collecting groove 7 from meshes, and therefore the required full rice is screened on the sieve plate 71, and secondary screening of the rice is achieved. Wherein, when sieve 71 one side down moved, the arch 72 of dust collection groove 7 bottom passed the mesh on the sieve 71 to poke the mesh of jam, supply impurity and the particle in the rice to pass through, thereby realize the abundant screening to the rice.

The foregoing is merely an example of the present invention and common general knowledge in the art of specific structures and/or features of the invention has not been set forth herein in any way. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Rice sieving mechanism, including frame and the pivot of horizontal setting, its characterized in that: the inner frame barrel is hollow, a through hole is formed in the surface of the inner frame barrel, and the through hole is communicated with the feed inlet;

the end part of the inner frame cylinder is hinged with a connecting rod, one end of the connecting rod is hinged with a fixed rod, the fixed rod is connected with a fixed block, an ash collecting groove is arranged below the outer frame cylinder, the top of the ash collecting groove is open, a sieve plate is arranged on the ash collecting groove, the sieve plate extends out of the side wall of the ash collecting groove and is eccentrically hinged with the fixed block, meshes are arranged on the sieve plate, and bulges corresponding to the meshes are arranged at the bottom;

the utility model discloses a cylinder, including a frame section of thick bamboo, a pivot, a cylinder, a piston rod, a guide pin post, a cylinder and a gas inlet check valve, the frame section of thick bamboo is fixed in the frame and the inside cavity that is of lateral wall, the frame section of thick bamboo is passed in the pivot, pivot one end is equipped with the cylindrical cam, be equipped with the cylinder that corresponds with the cylindrical cam in the frame, be equipped with the piston in the cylinder, the piston is connected with the piston rod, fixedly connected with inserts the guide pin post of cylindrical cam recess on the piston rod, cylinder one side is equipped with first pipe and first trompil, first pipe connection has the air heater, be connected with the second pipe on the air heater, the second pipe stretches into in the lateral wall of frame section of thick bamboo, be equipped with the check valve of giving vent to anger on the first pipe, when.

2. The rice screening apparatus of claim 1, wherein: the cylinder opposite side is equipped with third pipe and second trompil, and the open end of third pipe is located outer frame bobbin base portion, and is equipped with the check valve of giving vent to anger on the third pipe, and when the piston moved to the third pipe, the check valve of giving vent to anger was opened, and the gas of cylinder is discharged along the third pipe, is equipped with the check valve that admits air on the second trompil, and when the piston kept away from the third pipe, external gas got into.

3. The rice screening apparatus of claim 2, wherein: and a collecting box corresponding to the open end of the third guide pipe is arranged at the bottom of the outer frame cylinder.

4. The rice screening apparatus of claim 1, wherein: still include transport mechanism, transport mechanism includes the action wheel, from the driving wheel and overlaps the belt of establishing between action wheel, from the driving wheel, the action wheel is fixed on the motor output shaft, fixes in the pivot from the driving wheel, installs the converter on the motor for the rotational speed of regulation motor.