CN108940878B

CN108940878B - Cereal cleaning equipment

Info

Publication number: CN108940878B
Application number: CN201811114166.0A
Authority: CN
Inventors: 黎尔素; 潘炼红; 谢力成
Original assignee: Hunan Xiangliang Machinery Manufacturing Co ltd
Current assignee: Hunan Xiangliang Machinery Manufacturing Co ltd
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2024-01-09
Anticipated expiration: 2038-09-25
Also published as: CN108940878A

Abstract

The invention discloses grain cleaning equipment which comprises a feed hopper, a refining screening mechanism, a winnowing mechanism, a vibrating screening mechanism, a conveyor and a rack, wherein the refining screening mechanism adopts vibrating refining to separate out impurities with larger radial sizes contained in grains and adopts an inclined structure design to refine the grains; the feeding hopper, the refining screening mechanism, the winnowing mechanism and the vibration screening mechanism are all fixed on the frame; the feeding hopper, the refining screening mechanism, the winnowing mechanism and the vibration screening mechanism are sequentially communicated; the conveyer is located the below of vibration screening mechanism's discharge gate. The grain cleaning equipment has the advantages of good screening effect and high screening efficiency, realizes cleaning and transportation at a glance, and has high working efficiency.

Description

Cereal cleaning equipment

Technical Field

The invention relates to the technical field of grain screening, in particular to grain cleaning equipment.

Background

Grains harvested from farmlands often contain a large amount of impurities such as leaves, chaff, scraps, clods, and the like, and therefore, the impurities contained in the grains need to be screened.

The existing screening mode can only roughly screen sundries in grains, and many sundries still exist in the screened grains, so that the screening effect is poor, and the screening efficiency is low. In addition, current screening methods adopt the mode of manual handling to carry cereal to the storage granary and store after finishing to cereal screening, work efficiency is low.

Disclosure of Invention

The invention provides grain cleaning equipment which aims to solve the technical problems of poor screening effect, low screening efficiency and low working efficiency of the existing screening mode.

According to one aspect of the present invention, there is provided a grain cleaning apparatus comprising a hopper, a refining screening mechanism employing vibrating refining to separate out impurities of larger radial size contained in grains and employing an inclined structural design to refine the grains, a winnowing mechanism employing a closed flow field to separate out light and heavy impurities contained in the grains, a vibrating screening mechanism facilitating adjustment of an inclined angle, a conveyor and a frame employing a double conveyor to clamp the grains to unidirectionally convey the grains to a high place; the feeding hopper, the refining screening mechanism, the winnowing mechanism and the vibration screening mechanism are all fixed on the frame; the feeding hopper, the refining screening mechanism, the winnowing mechanism and the vibration screening mechanism are sequentially communicated; the conveyer is located the below of vibration screening mechanism's discharge gate.

Further, the refining screening mechanism comprises a first vibrating piece for screening grains, a grain transportation layer for carrying out refining transmission on the screened grains, a first feeding port for feeding, a sundry discharging port for outputting sundries and a grain discharging port for outputting grains; one end of the first vibrating piece is communicated with the first feeding hole, the other end of the first vibrating piece is communicated with the sundry discharging hole, the grain transportation layer is communicated with the grain discharging hole, and the first vibrating piece is positioned above the grain transportation layer; the first vibrating piece is provided with an inclined part at a position right below the first feeding hole, and the inclined angle of the inclined part is 15-60 degrees.

Further, the grain transportation layer is obliquely provided with a convex back part for refining the screened grains in a region close to the first feeding port; the convex back part comprises a first refining part and a second refining part which are connected; the first refining part is positioned right below the inclined part, and the inclined angle of the second refining part is larger than that of the first refining part.

Further, the air separation mechanism comprises a first fan for compressing and conveying air flow, a first dust remover and a second dust remover for removing dust from the air flow, an air separation box for separating grains by air and a second feed inlet for feeding; the second feeding hopper is positioned above the winnowing box and is communicated with the winnowing box; the air outlet of the first fan is respectively communicated with the air inlet of the winnowing box and the second dust remover; the air outlet of the winnowing box is communicated with the air inlet of the first fan through the first dust remover; the bottom of the winnowing box is provided with a heavy impurity outlet, a grain particle outlet and a light impurity outlet in sequence along the flowing direction of the air inlet flow.

Further, the winnowing box further comprises a rectifying box which is arranged at the air inlet of the winnowing box and used for adjusting the wind direction when the airflow enters the winnowing box.

Further, the vibration screening mechanism comprises a screen box for screening grains, a screen seat for installing the screen box, a second vibrating member fixedly arranged on the screen seat and used for providing vibration, a vibrating base for providing vibration, a base for providing supporting function, and an elastic supporting member for connecting the screen seat and the vibrating base and elastically supporting the screen seat; at least two elastic supporting pieces are arranged at intervals and elastically support the screen seat on the vibration base; the vibration base is arranged on the base.

Further, one end of the vibration base is rotatably connected with the base, and the other end of the vibration base is fixedly connected with the base and the fixed position of the vibration base is adjustable.

Further, the vibration screening mechanism further comprises a vibration direction normal supporting mechanism for limiting the screen seat in the direction perpendicular to the vibration direction; the vibration direction normal supporting mechanism is respectively connected with the screen seat and the vibration base.

Further, the vibration screening mechanism also comprises an adjusting screw rod which is connected with the screen seat and used for adjusting the inclination angle; the bottom of the adjusting screw is movably connected with the vibration base.

Further, the conveyor comprises a third feed opening for feeding the grains, a first belt conveyor for transporting the grains to a high place, a second belt conveyor which is arranged above the first belt conveyor and parallel to the first belt conveyor and is used for pressing the grains on the first belt conveyor, a first motor for driving the first belt conveyor and a second motor for driving the second belt conveyor; the third feeding port is positioned above the feeding end of the first belt conveyor; the first belt conveyor and the second belt conveyor rotate in opposite directions.

The invention has the following beneficial effects:

according to the grain cleaning equipment, grains are subjected to refining and vibration screening through the refining screening mechanism when the grains are fed, sundries such as leaves, clods and the like with larger radial sizes contained in the grains can be screened out, the refining effect and the refining speed of the grains can be improved through the inclined structure design, then, separation of grains and impurities is realized according to different weights through a closed flow field by utilizing an air flow blowing mode, some light impurities such as empty grain hulls, broken leaves, husks and fragments with lighter weight and heavy impurities with heavier weight are screened, then, final fine screening is performed through the vibration screening mechanism, and the inclination angle can be conveniently adjusted in the vibration process, so that pure grain particles are obtained.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

fig. 1 is a schematic structural view of a grain cleaning apparatus according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of the refining screening mechanism of fig. 1 according to a preferred embodiment of the present invention.

Fig. 3 is a schematic structural view of the air separation mechanism in fig. 1 according to a preferred embodiment of the present invention.

Fig. 4 is a schematic view of the vibratory screening mechanism of fig. 1 in accordance with a preferred embodiment of the present invention.

Fig. 5 is a schematic structural view of a variant embodiment of the vibration-oriented normal bearing mechanism of fig. 4 in accordance with a preferred embodiment of the present invention.

Fig. 6 is a schematic front view of a combined dust collector according to a preferred embodiment of the present invention.

Fig. 7 is a schematic top view of a combined dust collector according to a preferred embodiment of the invention.

Fig. 8 is a schematic view of a modified embodiment of the vibratory screening mechanism of fig. 1 in accordance with a preferred embodiment of the invention.

Fig. 9 is a schematic view of the conveyor of fig. 1 in accordance with a preferred embodiment of the present invention.

Legend description:

11. a feed hopper; 12. a refining screening mechanism; 13. a wind separation mechanism; 14. a vibration screening mechanism; 15. a conveyor; 16. a running chassis; 121. a sundry discharging port; 122. a cereal discharge port; 123. a first vibrating member; 124. a cereal transport layer; 125. a screening layer; 126. a convex back; 127. an inclined portion; 128. a first feed port; 129. a base; 1210. a support; 131. a first fan; 132. a winnowing box; 134. a first dust collector; 135. a light impurity outlet; 136. a partition plate; 137. a cereal grain outlet; 138. explosion venting door; 139. a material homogenizing door; 1310. a heavy impurity outlet; 1311. a second feed inlet; 1312. a rectifying box; 1313. a first outlet air flow distribution element; 1314. a second dust collector; 141. a screen box; 143. a screen seat; 144. a second vibrating member; 145. a vibration base; 146. a base; 147. a vibration direction normal supporting mechanism; 148. an elastic support; 1471. a support base; 1472. a roller; 1475. a second hinge base; 1476. a connecting rod; 1477. a first hinge base; 1479. a special-shaped connecting plate; 100. a combined dust remover; 101. an air outlet pipe; 102. an air suction pipe; 103. a third dust collector; 104. a fourth dust collector; 105. a second outlet air flow distribution element; 106. a second fan; 107. a chassis; 108. a wheel; 201. a socket; 202. adjusting a screw; 203. a locking member; 204. an adjusting plate; 151. a third feed inlet; 152. a first belt conveyor; 153. a non-return plate; 154. an angle adjusting mechanism; 155. a second belt conveyor; 157. casters; 158. a first motor; 159. a second motor; 1510. a cavity; 1511. a feed chamber; 1512. a transport chamber; 1513. a discharge cavity; 1521. a first drive wheel; 1522. a first driven wheel; 1523. a second driven wheel; 1524. a third driven wheel; 1525. a limiting wheel; 1541. a support wheel; 1542. a first connector; 1543. a second connector; 1551. a second driving wheel; 1552. and a fourth driven wheel.

Detailed Description

Embodiments of the invention are described in detail below with reference to the attached drawing figures, but the invention can be practiced in a number of different ways, as defined and covered below.

As shown in fig. 1, the preferred embodiment of the present invention provides a grain cleaning apparatus for cleaning grains, especially grains harvested from a farmland, and pure grains without including leaves, chaff, debris and the like can be obtained after the grain cleaning apparatus of the present invention is used for cleaning grains. The grain cleaning equipment comprises a feeding hopper 11 used for feeding grains, a refining screening mechanism 12 used for refining the fed grains and simultaneously carrying out preliminary screening on the grains, a winnowing mechanism 13 used for carrying out winnowing on the grains, a vibration screening mechanism 14 used for carrying out vibration screening on the grains, a conveyor 15 used for conveying the grains, a traveling chassis 16 used for moving the grain cleaning equipment and a frame 17, wherein the frame 17 is fixedly arranged on the traveling chassis 16, the feeding hopper 11, the refining screening mechanism 12, the winnowing mechanism 13 and the vibration screening mechanism 14 are all fixed on the frame 17, the feeding hopper 11 is communicated with a feeding port of the refining screening mechanism 12, a discharging port of the refining screening mechanism 12 is communicated with a feeding port of the winnowing mechanism 13, the discharging port of the winnowing mechanism 13 is communicated with the vibration screening mechanism 14, and the feeding port of the conveyor 15 is positioned below the discharging port of the vibration screening mechanism 14 so as to conveniently transmit pure grains obtained after cleaning. It will be appreciated that wheels, preferably universal wheels, are mounted on the travelling chassis 16 to facilitate movement of the grain cleaning apparatus of the present invention. As a modification, the chassis 16 is further provided with a wheel positioning device for positioning wheels to realize fixed-point positioning and parking; or a portion of the chassis 16 may extend downwardly to form a bottom support and lift the wheels off the ground.

It will be appreciated that the grain cleaning apparatus of the present invention performs primary screening on grains by the refining screening mechanism 12 during feeding, and may screen out impurities such as leaves, clods, etc. with larger radial dimensions contained in the grains, then performs screening treatment on some light impurities such as empty hulls, crushed leaves, chaff, detritus, etc. with light weight and heavy impurities with excessive weight by the air separation mechanism 13, and finally performs final fine screening by the vibration screening mechanism 14, thereby obtaining pure grains, and then conveys the pure grains obtained after screening to a grain storage bin for storage by the conveyor 15, thereby realizing cleaning and transportation at a glance, and the screening precision is high and the screening effect is good.

As shown in fig. 2, the refining screening mechanism 12 includes a base 129 for supporting, a first vibrating member 123 for screening grains, a grain transporting layer 124 for transporting the grains after screening, a supporting member 1210 for supporting the grain transporting layer 124, a first feeding port 128 for feeding, a foreign matter discharging port 121 for discharging foreign matters, and a grain discharging port 122 for discharging grains. One end of the supporting member 1210 is connected with the bottom of the grain transportation layer 124, the other end is connected with the base 129, one end of the first vibrating member 123 is communicated with the first feeding port 128, the other end is communicated with the sundry discharging port 121, the grain transportation layer 124 is communicated with the grain discharging port 122, and the first vibrating member 123 is located above the grain transportation layer 124. It will be appreciated that the first feeding port 128 is communicated with the feeding hopper 11, grains harvested from the farmland are added into the first vibrating member 123 from the first feeding port 128, the grains such as leaves, chaff, scraps, clods and the like contained in the grains are screened out by the vibration screening of the first vibrating member 123 to remain in the first vibrating member 123, grains particles fall from the first vibrating member 123 to the grain transportation layer 124, the grains such as leaves, chaff, scraps, clods and the like with larger radial sizes are discharged from the grain discharging port 121, and grains particles and grains with smaller radial sizes are discharged from the grain discharging port 122. Specifically, the bottom of the first vibrating member 123 is provided with a screening layer 125, the mesh aperture size of the screening layer 125 is 3-6 cm, preferably 3-5 cm, grains and impurities with smaller grain diameters drop from the screening layer 125 to the grain transportation layer 124, and impurities such as leaves, chaff, chips, clods and the like with larger radial sizes remain on the screening layer 125. It will also be appreciated that in order to facilitate the transport of debris such as leaves, chaff, dust, earth and the like of relatively large radial dimensions within the sifting layer 125 to the debris discharge port 121 for discharge and the transport of grain particles and debris of relatively small radial dimensions within the grain transport layer 124 to the grain discharge port 122 for discharge, both the sifting layer 125 and the grain transport layer 124 are inclined at an angle of 5 ° to 12 °, preferably 5 ° to 10 °, and in some embodiments of the invention, 6 °, 10 ° or 12 °. It will be appreciated that the first vibrating member 123 is a vibrating screen, and the supporting member 1210 may be a rigid connecting member or an elastic connecting member, and preferably, the supporting member 1210 is an elastic connecting member, and further preferably, a spring, so as to achieve a good vibration-absorbing effect. It will also be appreciated that the base 129 and support 1210 may be omitted.

In order to prevent the grains harvested from the farmland from being accumulated at a position below the first feeding hole 128 to cause clogging, the screening layer 125 is provided with an inclined portion 127 at a position right below the first feeding hole 128 so that the grains added into the first vibrating member 123 from the first feeding hole 128 can be uniformly spread as soon as possible. The inclination angle of the inclined portion 127 is 15 ° to 60 °, preferably 15 ° to 30 °, it being understood that in some embodiments of the present invention, the inclination angle of the inclined portion 127 may be 15 °, 20 °, 25 °, 30 °, 35 °, or 40 °.

According to the invention, the inclined part 127 is arranged at the position right below the first feed inlet 128, so that grains added from the first feed inlet 128 can be uniformly dispersed in the first vibrating piece 123 as soon as possible, the grains are prevented from blocking the first feed inlet 128, and the screening efficiency and the screening quality are improved.

It can be further understood that, as a variant, the inclined portion 127 is further provided with an angle adjusting mechanism (not shown), and the inclined angle of the inclined portion 127 can be adjusted by an air cylinder, an oil cylinder, a telescopic rod, a spring and the like, so that the adjustment of the inclined angle can be conveniently performed at any time according to the screening and refining conditions, and the operation is very convenient.

Since the inclined portion 127 is located at a position directly below the first feed port 128, the number of grains falling from the inclined portion 127 to the grain transportation layer 124 is much larger than the number of grains falling from other regions of the screening layer 125 to the grain transportation layer 124, and in order to prevent the grains falling from the inclined portion 127 to the grain transportation layer 124 from forming a pile in the grain transportation layer 124, the grain transportation layer 124 is provided with a convex back portion 126 for carrying out a refining transport on the screened grains at a position close to the first feed port 128, i.e., a region located below the inclined portion 127, and the convex back portion 126 is obliquely arranged. The convex back 126 includes a first refining portion 1212 and a second refining portion 1211 connected to each other, wherein the second refining portion 1211 is located directly under the inclined portion 127, and the first refining portion 1212 and the second refining portion 1211 connected to each other are integrally convex in shape from a top view, and the convex structure can facilitate rapid uniform scattering of grains falling from the inclined portion 127 in the grain transportation layer 124, preventing grain accumulation. The inclination angle β of the first refining section 1212 is 15 ° to 30 °, preferably 15 ° to 25 °. The inclination angle α of the second refining section 1211 is 25 ° to 50 °, preferably 26 ° to 40 °. Generally, the inclination angle α of the second refining section 1211 is larger than the inclination angle β of the first refining section 1212, so that grains can be rapidly transported and uniformly dispersed in the grain transportation layer 124 due to the gravity.

According to the grain conveying layer 124, the convex back part 126 for refining the screened grains is obliquely arranged in the area, close to the first feed inlet 128, of the grain conveying layer 124, and the convex-shaped structure can be used for conveniently and rapidly uniformly dispersing grains falling from the inclined part 127 in the grain conveying layer 124, so that accumulation is prevented. Moreover, the convex back 126 includes a first refining portion 1212 and a second refining portion 1211 connected to each other, the first refining portion 1212 is located directly below the inclined portion 127, and the inclination angle α of the second refining portion 1211 is larger than the inclination angle β of the first refining portion 1212, so that grains can be rapidly transported and uniformly dispersed in the grain transportation layer 124 due to the gravity of the grains.

It will be appreciated that the structure of the convex back 126 may also be that the middle shaft is high and low at two sides, the middle part protrudes, and the periphery is bent downwards or inclined in a sector-shaped region, so that grains can slide down uniformly along the inclined surface of the convex back 126 due to the gravity of the grains, and the grains are not accumulated.

It will be appreciated that, as a modification, in order to prevent clogging of the sifting layer 125, a brush (not shown) for sweeping the grains laterally is provided in the first vibrating member 123, so that the sifting surface of the sifting layer 125 can be cleaned rapidly to prevent clogging. Alternatively, a vibrator (not shown) for vibrating the screening surface of the screening layer 125 may be provided to the screening layer 125, and the foreign substances and/or grains clogged in the mesh of the screening layer 125 may be ejected by the vibration.

It will be appreciated that, as a modification, in order to accelerate the uniform dispersion and transmission of the grain particles obtained after screening in the grain transportation layer 124, a vibrator (not shown) is installed below the grain transportation layer 124, and the transmission and uniform dispersion of the grain particles in the grain transportation layer 124 are accelerated by the external vibration action of the vibrator.

It will also be appreciated that, as another variation, in order to speed up the uniform dispersion and transport of the grain particles obtained after screening in the grain transportation layer 124, a fan (not shown) may be installed on top of the grain transportation layer 124, and the grain particles may be uniformly dispersed in the grain transportation layer 124 by blowing the fan.

It will be further appreciated that, as another modification, in order to accelerate the uniform dispersion of the cereal grains obtained after screening in the cereal transportation layer 124, a rotary stirring member (not shown) may be provided in the cereal transportation layer 124, and the cereal grains are accelerated to uniformly disperse in the cereal transportation layer 124 by the rotary stirring effect of the rotary stirring member. It will be appreciated that the external shape of the rotary stirring member may be a blade shape or a brush shape. Or the upper surface of the inner wall of the grain transportation layer 124 is further provided with an air flow nozzle, which can spray air flow to wash grains, so as to accelerate grains to be uniformly dispersed in the grain transportation layer 124.

It will also be appreciated that, as a further variation, if the grain contains debris such as leaves, chaff, detritus, clods, etc. of smaller radial dimensions, it may also fall through the sifting layer 125 to the grain transportation layer 124, so that the sifted grain may still contain small amounts of debris of smaller radial dimensions, and the grain size will typically be less than 2cm. Therefore, by providing a filter cover (not shown) for filtering at the grain outlet 122, the mesh aperture size of the filter cover is 0.5-2 cm, preferably 0.5-1 cm, so that grains can be further screened, impurities can be blocked on the filter cover, the screening quality is improved, and only the filter cover needs to be cleaned regularly.

It will be appreciated that as another variation, the refining screening mechanism 12 further includes a debris collection bin (not shown) located directly below the debris outlet 121 to facilitate collection of debris having a larger radial dimension.

As shown in fig. 3, the air separation mechanism 13 includes a first fan 131 for compressing and conveying an air flow, a first dust remover 134 and a second dust remover 1314 for removing dust from the air flow, an air separation box 132 for separating grains, and a second feed inlet 1311 for feeding grains, where the second feed inlet 1311 is located above the air separation box 132 and is communicated with the air separation box 132, and an air outlet of the first fan 131 is respectively communicated with an air inlet of the air separation box 132 and the second dust remover 1314, and an air outlet of the air separation box 132 is communicated with the air inlet of the first fan 131 through the first dust remover 134, and a heavy impurity outlet 1310, a grain outlet 137, and a light impurity outlet 135 are sequentially arranged at the bottom of the air separation box 132 along the flow direction of the air inlet flow. It will be appreciated that the second feed inlet 1311 is communicated with the discharge port of the refining screening mechanism 12, and grains containing impurities obtained after primary screening by the refining screening mechanism 12 can be further screened out after being subjected to air separation in the air separation box 132, and impurities and grains are respectively discharged from different discharge ports at the bottom of the air separation box 132. Specifically, the air inlet amount of the air separation box 132 is adjusted by adjusting the air outlet amount of the first fan 131, so that the discharge of heavy impurities contained in grains from the heavy impurity outlet 1310, the discharge of solid grains and semi-solid grains from the grain outlet 137, and the discharge of light impurities from the light impurity outlet 135 can be accurately controlled. It will be appreciated that the heavy impurity outlet 1310, the grain outlet 137 and the light impurity outlet 135 are each provided with a partition door, and the partition doors are pushed to be discharged only when the respective accumulated weights of the heavy impurities, the grain particles and the light impurities reach a certain level, otherwise, the partition doors are in a closed state, so as to ensure that the winnowing box 132 has good sealing performance.

The winnowing mechanism 13 adopts circulating airflow to screen grains, a closed flow field is formed inside the winnowing box 132, and the inside of the winnowing box 132 is communicated with the outside only through the second feed inlet 1311, so that the grain screening device has the advantages of good screening effect and high screening efficiency. And through setting up second dust remover 1314 and come with first fan 131 intercommunication, the air current that the more that comes that first dust remover 134 can not carry out dust removal processing is passed through the dust removal of second dust remover 1314 and is passed through the external world again, prevents to cause the pollution to the air, can also ensure the atmospheric pressure balance in the selection by winnowing case 132 simultaneously all the time, makes the circulating air flow in the selection by winnowing case 132 be in stable circulation state, has further ensured good selection by winnowing effect.

In addition, the air outlet of the first fan 131 is respectively communicated with the air inlet of the air separation box 132 and the second dust remover 1314 through pipelines, a first air outlet flow distribution element 1313 for adjusting the air volume ratio respectively output to the air separation box 132 and the second dust remover 1314 is arranged on the air outlet pipeline of the air separation box 132, and the arrangement of the first air outlet flow distribution element 1313 is convenient for adjusting the air inlet of the air separation box 132 and the second dust remover 1314 according to actual conditions so as to ensure that the air separation box 132 has good screening effect. It is appreciated that the first outlet flow distribution element 1313 may be an outlet flow distribution valve or a wind deflector. For example, an upward turning plate is arranged on a pipeline of the first fan 131 which is led into the second dust remover 1314, the turning plate falls down by self gravity to close the pipeline, and when the air flow of the first fan 131 which is led into the air separation box 132 reaches a preset value, the turning plate is impacted to turn on so that the air flow flows to the second dust remover 1314, so that the purpose of reducing the air flow in the air separation box 132 is achieved. Or, a flow valve is arranged on a pipeline communicated with the first fan 131 and the air separation box 132 to detect the air flow in the air separation box 132 at any time, and an electromagnetic valve is arranged on a pipeline communicated with the first fan 131 and the second dust remover 1314, when the flow valve detects that the air flow in the air separation box 132 reaches a threshold value, the electromagnetic valve is controlled to be opened, so that the purpose of reducing the air flow in the air separation box 132 is achieved.

In addition, the air separation box 132 further comprises a rectifying box 1312 arranged at the air inlet of the air separation box 132 and used for adjusting the air direction when the air flow enters the air separation box 132, and the air flow output by the air outlet of the first fan 131 is firstly adjusted in the direction of the air flow through the rectifying box 1312, so that a good air separation effect in the air separation box 132 is ensured. Specifically, the rectifying box 1312 is provided with a plurality of parallel rectifying grids on one side close to the air separation box 132, the plurality of rectifying grids are arranged obliquely upwards, the wind flow output by the first fan 131 forms parallel oblique upwards wind flow after passing through the rectifying grids, when grains leak downwards through the second feeding hole 1311, the wind flows to force the grains in a horizontal direction and force upwards, heavy impurities are discharged from the heavy impurity outlet 1310 close to the air inlet of the air separation box 132 due to heavy weight, the grains slightly deviate forwards under the action of wind force and are discharged from the grain outlet 137 due to light weight and weight of the light impurities is lightest, and the grains fly to the forefront end under the action of wind force and are discharged from the light impurity outlet 135. It will be appreciated that the angle of the rectification grids and the gaps between adjacent rectification grids can be adjusted according to practical situations, so that the direction and air flow of the air inlet in the air separation box 132 can be conveniently adjusted based on grains containing different impurity components, and a good air separation effect can be ensured.

In addition, a blanking port of the second feeding port 1311 is provided with a refining gate 139 for controlling uniform blanking of grains, and the blanking amount of grains is controlled by controlling the opening width of the refining gate 139. It will be appreciated that when the width of the refining gate 139 is 2-5 cm, the grains can be waterfall-shaped and discharged, so that good screening effect can be ensured after the grains enter the winnowing box 132.

In addition, a partition 136 for blocking is provided between the heavy impurity outlet 1310 and the cereal grain outlet 137 and/or between the cereal grain outlet 137 and the light impurity outlet 135, so as to prevent heavy impurities from falling into the area of the cereal grain outlet 137 and/or prevent cereal grains from falling into the area of the light impurity outlet 135, thereby further ensuring a good screening effect.

In addition, a vent 138 for preventing explosion caused by excessive pressure in the air separation box 132 is movably provided at the top of the air separation box 132. Before the grain is winnowed, the top of the explosion venting door 138 and the top of the winnowing box 132 are sealed by using an adhesive tape, if the pressure in the winnowing box 132 is increased due to overlarge dust content, the explosion venting door 138 can be opened by pressure to quickly release pressure when the pressure exceeds the standard, and the winnowing box 132 is prevented from being damaged.

In addition, the first dust collector 134 and/or the second dust collector 1314 are any one of cyclone dust collectors, filter dust collectors, electrostatic dust collectors, and bag dust collectors. Preferably, the first dust collector 134 is a cyclone dust collector, and the second dust collector 1314 is a filter dust collector. When the first dust collector 134 is a cyclone dust collector, an ash blocking baffle (not shown) for blocking dust is arranged at a position, close to an outlet, of the first dust collector 134, and when cyclone airflow of the first dust collector 134 flows, dust cannot be accumulated on the inner wall of the first dust collector, but falls along the ash blocking baffle after the airflow collides with the ash blocking baffle, and falls from the outlet of the first dust collector 134, so that dust accumulation on the inner wall of the first dust collector 134 is avoided, and because the rotating airflow cannot flow in the ash blocking baffle area, dust is prevented from being driven by the rotating airflow to fly up, secondary flying of dust is prevented, and dust is convenient to collect. And, as a preferable mode, a flow guide baffle (not shown) for guiding dust is arranged in the cyclone dust collector, and dust entrained in the rotating airflow can slide to an outlet of the cyclone dust collector along the flow guide baffle after hitting the flow guide baffle, so that dust is further prevented from being deposited on the inner wall of the cyclone dust collector. It will be appreciated that an ash collection bin (not shown) is disposed below the first dust collector 134 and/or the second dust collector 1314 to facilitate the centralized treatment of the dust collected in the first dust collector 134 and/or the second dust collector 1314.

In addition, as a modification, a vibrator (not shown) for providing vibration to promote the falling of dust on the inner wall of the dust remover is installed on the outer wall of the first dust remover 134 and/or the second dust remover 1314, so that dust is prevented from being deposited on the inner wall of the first dust remover 134 and/or the second dust remover 1314 to reduce the dust removing effect.

In addition, a filter cover (not shown) for filtering is provided at the air inlet of the first dust collector 134, and the mesh hole size of the filter cover is 0.5-3 cm. Because the air inlet of the first dust remover 134 is directly communicated with the air separation box 132, the filter cover is arranged at the air inlet of the first dust remover 134, so that the first dust remover 134 is prevented from being failed because light impurities in the air separation box 132 can enter the first dust remover 134.

In addition, as another modification, the air separation mechanism 13 further includes an air cleaner (not shown) for purifying the air flow outputted from the second dust remover 1314, and the second dust remover 1314 communicates with the outside through the air cleaner. After the purification treatment of the air purifier, the cleanliness of the output air flow is greatly improved, and the air pollution is further prevented.

In addition, as another modification, the air separation mechanism 13 further includes a heavy impurity collecting box and a light impurity collecting box provided at positions directly below the heavy impurity outlet 1310 and the light impurity outlet 135, respectively, so as to facilitate respective collection and centralized treatment of the heavy impurities and the light impurities.

As shown in fig. 4, the vibration screening mechanism 14 includes a screen box 141 for screening grains, a screen seat 143 for mounting the screen box 141, a second vibrating member 144 fixedly provided on the screen seat 143 for providing vibration, a vibrating base 145 for providing vibration, a base 146 for providing supporting function, and an elastic support member 148 for connecting the screen seat 143 and the vibrating base 145 and elastically supporting the screen seat 143, one end of the vibrating base 145 is rotatably connected with the base 146, and the other end is fixedly connected with the base 146 and the fixed position is adjustable. Wherein at least two elastic supporting members 148 are spaced apart and elastically support the screen seat 143 on the vibration base 145. It will be appreciated that the screen box 141 is in communication with the outlet of the air separation mechanism 13 and the cereal after air separation is further screened in the vibratory screening mechanism 14. It can be further understood that the base 146 is provided with a limiting groove, a plurality of fixing points are spaced in the limiting groove, one end of the vibration base 145 is rotatably connected with the base 146 (a position in fig. 4), and the other end of the vibration base 145 can be respectively fixed on different fixing points in the limiting groove (B position in fig. 4), so that the vibration base 145 is fixedly connected with the base 146 and the fixing position of the vibration base 145 on the base 146 is adjustable, and the inclination angle of the screen box 141 is adjusted. Wherein, one end of the vibration base 145 is rotatably connected with the base 146 to form a rotary shaft type connection or hinge connection, and the other end of the vibration base 145 is respectively locked at different fixing points in the limiting groove by screws or bolts. For example, a plurality of bayonets may be provided in the limit groove, and the other end of the vibration base 145 may be respectively locked at the different bayonets by screws or bolts. It will be appreciated that the adjustment of the inclination angle of the screen seat 143 and the screen box 141 is facilitated by adjusting the fixed position of the vibration base 145 on the base 146. It will be appreciated that the vibration base 145 is additionally provided with a vibration source, so as to greatly improve the amplitude of the screen box 141 and the screening effect of the vibration screening mechanism 14. The vibration source may be a vibration exciter or a vibration motor.

It will be appreciated that the types of grains to be screened are different and the corresponding screen box models are different. In the present invention, the screen box 141 is detachably fastened to the screen seat 143, so that the screen box 141 can be suitably replaced for different grain types, thereby being applicable to screening of various grains. In addition, when a large number of grains need to be screened at one time, the size of the existing screen box 141 is too small, if the existing screen box 141 is used for screening a large number of grains, the screening efficiency can be improved and the screening effect can be ensured simultaneously by replacing the screen box 141 with a larger size because the grains are closely stacked in the screen box 141. It will be appreciated that the removable connection of the screen box 141 and the screen seat 143 may be by a threaded connection, a pin connection, a key connection, a snap connection, a hinge connection, a dovetail connection, or the like.

It is understood that the second vibration member 144 is a vibration exciter or a vibration motor. It will be appreciated that in some embodiments of the invention, the second oscillating member 144 may also be a cam mechanism, eccentric, deflecting wheel, or swing arm, etc. It will be further appreciated that the elastic support members 148 are support springs, further reducing the rigidity of the overall structure of the vibratory screening mechanism 14, and providing a cushion between the screen seat 143 and the vibratory base 145 for good vibration damping and ensuring good screening of the vibratory screening mechanism 14. It will be appreciated that the elastic support 148 is pivotally connected or hinged at both ends to the screen seat 143 and the vibration base 145, respectively.

The vibration screening mechanism 14 of the invention provides additional vibration by adding the vibration base 145, so that the vibration amplitude of the screen seat 143 is greatly improved, and the screening effect of the vibration screening mechanism 14 is improved. In addition, the two elastic supporting members 148, the screen seat 143 and the vibration base 145 together form a four-bar mechanism, and the inclination angle of the screen seat 143 is adjusted by adjusting the fixed position of the vibration base 145 on the base 146, so that the inclination angle of the screen box 141 fixedly mounted on the screen seat 143 is adjusted, and the operation is very convenient. In addition, the vibrating platform of the invention can be suitable for different sizes and models of screen boxes 141, and the screen boxes 141 can be adaptively replaced according to different grain types or screening numbers, so that the vibrating platform has strong universality.

In addition, the vibration direction of the vibration base 145 is preferably parallel to the vibration direction of the second vibrating member 144, so that the vibration amplitude of the screen box 141 can be maximized, and the screening effect of the vibration screening mechanism 14 can be further improved.

In addition, preferably, the vibration table further includes a vibration direction normal supporting mechanism 147 for limiting the screen seat 143 in a direction perpendicular to the vibration direction, and the vibration direction normal supporting mechanism 147 is connected to the screen seat 143 and the vibration base 145, respectively. The vibration direction normal direction supporting mechanism 147 includes a roller 1472 fixed to the screen base 143 and a supporting base 1471 provided to the vibration base 145 for supporting the roller 1472, a plane of the supporting base 1471 contacting the roller 1472 is parallel to a vibration direction of the second vibration member 144, and the supporting base 1471 is rotatable with respect to the vibration base 145. When the second vibrating member 144 drives the screen seat 143 to vibrate, the roller 1472 may roll up and down along a plane where the support seat 1471 contacts with the screen seat. The roller 1472 and the supporting seat 1471 can limit the screen seat 143 in the vibration direction perpendicular to the second vibration member 144, so that the whole connection structure of the vibration screening mechanism 14 is more stable, and the vibration screening mechanism has better connection reliability under high-frequency vibration, small mechanical damage and long service life. It will be appreciated that the roller 1472 is fixed on the screen seat 143 by a positioning shaft, the supporting seat 1471 is also connected with the vibration base 145 by a rotating shaft, and the supporting seat 1471 and the vibration base 145 are also provided with an arc-shaped limiting groove, and the supporting seat 1471 passes through its own arc-shaped limiting groove by a screw or a bolt and is locked in the arc-shaped limiting groove on the vibration base 145. It can be appreciated that before the inclination angle of the vibration screening mechanism 14 is adjusted, the screw or bolt is loosened, so that the support base 1471 is in a rotatable state, after the vibration direction is adjusted, the support base 1471 abuts against the roller 1472, and then the screw or bolt is used to fix the support base 1471.

According to the vibrating screening mechanism 14, the supporting seat 1471 and the roller 1472 are arranged to realize the relative movement between the screen seat 143 and the vibrating base 145 in the vibrating screening process, so that the rigidity of the whole structure of the vibrating screening mechanism 14 is reduced, the rolling direction of the roller 1472 is parallel to the vibrating direction, the screen seat 143 and the vibrating base 145 are limited from relative movement in the direction perpendicular to the vibrating direction, the relative movement between the screen seat 143 and the vibrating base 145 in the vibrating screening process cannot obstruct the movement of the screen seat 143 in the vibrating direction, the screen seat 143 can have larger amplitude under the same vibrating force, the screening effect is improved, the mechanical damage and the vibration noise of the vibrating screening mechanism 14 in the vibrating screening process are reduced, and particularly, the vibrating screening mechanism 14 has better connection reliability and longer service life under high-frequency vibration.

In addition, as a modification, as shown in fig. 5, the vibration direction normal supporting mechanism 147 includes a connection bar 1476 for automatically adapting to the vibration of the second vibration member 144 by rotation, both ends of the connection bar 1476 are rotatably connected to the screen seat 143 and the vibration base 145, respectively, and an axial direction of the connection bar 1476 intersects with the vibration direction of the second vibration member 144. Preferably, the connecting rod 1476 is disposed perpendicular to the second vibrating member 144, that is, the axial direction of the connecting rod 1476 is perpendicular to the vibrating direction of the second vibrating member 144, so that the exciting force provided by the second vibrating member 144 has no component force along the axial direction of the connecting rod 1476, and the exciting force provided by the second vibrating member 144 is all used for driving the screen seat 143 to vibrate, and the screen seat 143 has the maximum amplitude, so that the screening effect of the vibration screening mechanism 14 is further improved.

It will be appreciated that the two ends of the connecting rod 1476 may be rotatably connected to the screen seat 143 and the vibration seat 145 by a hinge or a rotary shaft. The rotation shaft type connection mode is specifically that a first rotation shaft is arranged on the screen seat 143, a second rotation shaft is arranged on the vibration base 145, two ends of the connecting rod 1476 are respectively sleeved on the first rotation shaft and the second rotation shaft and are limited, and in the vibration screening process, two ends of the connecting rod 1476 can respectively rotate around the first rotation shaft and the second rotation shaft. In the present invention, the connection manner of the connection rod 1476 to the screen seat 143 and the vibration seat 145 is preferably hinged, specifically, the vibration seat 145 is provided with a first hinge seat 1477, the screen seat 143 is provided with a second hinge seat 1475, and two ends of the connection rod 1476 are respectively hinged with the first hinge seat 1477 and the second hinge seat 1475. It is further preferred that the fixing position of the second hinge base 1475 on the screen base 143 can be adjusted, for example, a fan-shaped groove is provided on the screen base 143, a plurality of fixing points, for example, a plurality of bayonets are provided at intervals in the fan-shaped groove, the second hinge base 1475 can be respectively fixed on different fixing points, for example, the fixing shaft of the second hinge base 1475 is clamped into the bayonets. Alternatively, the sieve 143 may be provided with a plurality of threaded holes, and the second hinge base 1475 may be fastened in the threaded holes by screws. In addition, to facilitate the installation of the first hinge base 1477, the normal direction support mechanism 147 further includes a shaped connection plate 1479 for fixing the first hinge base 1477 to the vibration base 145, and one end of the shaped connection plate 1479 is used for fixing the first hinge base 1477, and the other end is fixedly connected to the vibration base 145.

The vibration direction normal supporting mechanism 147 can automatically adapt to the vibration of the second vibrating piece 144 through the rotation of the connecting rod 1476, and can limit the screen seat 143 in the vibration direction perpendicular to the second vibrating piece 144, so that the integral connecting structure of the vibration screening mechanism 14 is more stable, the connection reliability is better under high-frequency vibration, the mechanical damage is small, and the service life is long.

In addition, preferably, the elastic supporting member 148 is disposed parallel to the second vibration member 144, that is, the axial direction of the elastic supporting member 148 is parallel to the vibration direction of the second vibration member 144, the elastic supporting member 148 has the least obstruction to the screen seat 143 during the vibration screening, only one tensile force along the vibration direction, and the component force of the exciting force provided by the second vibration member 144 along the axial direction of the elastic supporting member 148 is the greatest, so that the elastic supporting member 148 can have the best vibration absorbing effect. It will be appreciated that in other embodiments of the invention, the angle between the axial direction of the resilient support 148 and the direction of vibration of the second vibration member 144 may be between 5 and 15.

In addition, as a modification, the vibration screening mechanism 14 further comprises a dryer and a blower drum for drying the grains, wherein an air outlet of the blower drum is close to the screen box 141, the blower drum is communicated with an air outlet of the dryer and transmits hot air output by the dryer to the screen box 141 so as to dry the grains, the grains are prevented from being affected in screening effect due to being damped and bonded together, and good screening effect of the vibration screening mechanism 14 is further ensured.

It will be further appreciated that, preferably, the screen box 141 is a semi-closed box body, which is only communicated with the outside through a feed inlet and a discharge outlet thereof, and an air inlet pipeline and an air outlet pipeline are provided on the screen box 141. As shown in fig. 6 and 7, the vibration screening mechanism 14 further includes a combined dust collector 100 for removing dust from grains, the combined dust collector 100 includes an air suction pipe 102 for sucking air, an air outlet pipe 101 for outputting air, a third dust collector 103 and a fourth dust collector 104 for removing dust, and a second fan 106 for compressing and conveying air, the air suction pipe 102 is communicated with an air outlet pipe on the screen box 141, the air outlet pipe 101 is communicated with an air inlet pipe on the screen box 141, the fourth dust collector 104 is communicated with an air inlet pipe of the outside and/or the screen box 141, the air suction pipe 102 is also respectively communicated with the third dust collector 103 and the fourth dust collector 104, the third dust collector 103 is communicated with the second fan 106, and the second fan 106 is communicated with the air outlet pipe 101. It will be appreciated that the vibratory screening mechanism 14 of the present invention provides for the dust removal of the vibratory screened grain in the screen box 141 by providing the modular dust collector 100 in communication with the air inlet and outlet lines, respectively, on the screen box 141, thereby creating a circulating air flow within the screen box 141.

The amount of air sucked by the air suction pipe 102 is greater than the amount of air output by the air outlet pipe 101, and the amount of air sucked by the air suction pipe 102 is greater than the amount of air output by the air outlet pipe 101, which can be achieved by increasing the number of the air suction pipes 102, for example, the number of the air suction pipes 102 is at least three, the number of the air outlet pipes 101 is at least one, so that the number of the air suction pipes 102 is always greater than the number of the air outlet pipes 101. It will be appreciated that the number of vents on the screen box 141 is always equal to the sum of the number of suction ducts 102 and outlet ducts 101 of the combined duster 100. Meanwhile, since the air amount sucked by the air suction pipe 102 is larger than the air amount output by the air outlet pipe 101, the balance of the air input and output in the third dust remover 103 cannot be realized, and the fourth dust remover 104 is arranged to be communicated with the air suction pipe 102, and the excessive air which cannot be subjected to dust removal treatment by the third dust remover 103 can be filtered by the fourth dust remover 104 and then led to the outside and/or the negative pressure air suction pipe 2, so that the dust removal efficiency is improved and the dust removal effect is good. The third dust collector 103 and/or the fourth dust collector 104 is any one of a cyclone dust collector, a filter dust collector, an electrostatic dust collector and a bag dust collector, and preferably, the third dust collector 103 is a cyclone dust collector and the fourth dust collector 104 is a filter dust collector.

In addition, the air suction pipe 102 is respectively communicated with the third dust collector 103 and the fourth dust collector 104, a second air outlet flow distribution element 105 for adjusting the air quantity ratio output to the third dust collector 103 and the fourth dust collector 104 is arranged on a pipeline of the air suction pipe 102 communicated with the third dust collector 103 and the fourth dust collector 104, and the arrangement of the second air outlet flow distribution element 105 is convenient for adjusting the air outlet quantity of the third dust collector 103 and the fourth dust collector 104 according to actual conditions. It is understood that the second outlet flow distributing element 105 may be an outlet flow distributing valve or a wind deflector.

In addition, the combined dust collector 100 further comprises an ash collecting box arranged below the outlet of the third dust collector 103 and/or the fourth dust collector 104, so that dust collected by the third dust collector 103 and/or the fourth dust collector 104 can be conveniently concentrated.

In addition, the combined type dust collector 100 further includes a chassis 107 for providing a supporting function, the third dust collector 103 and the fourth dust collector 104 are mounted on the chassis 107, and wheels 108 for moving the combined type dust collector 100 are provided on the chassis 107. The wheels 108 may be provided to facilitate movement of the modular dust collector 100 of the present invention.

It will be appreciated that the suction duct 102 is provided with a filter housing (not shown) for filtering, the filter housing having a mesh aperture size of 0.5 to 3cm, preferably 0.5 to 1cm. By providing a filter housing at the suction pipe 102, it is possible to prevent grains and foreign matters contained therein from being sucked into the combined type dust collector 100 to damage the grains.

In addition, it can be understood that the third dust collector 103 is a cyclone dust collector, and an ash blocking baffle (not shown) for blocking dust is disposed at a position, close to an outlet, of the third dust collector 103, and when cyclone airflow of the third dust collector 103 flows, dust is not accumulated on the inner wall of the third dust collector, but falls down along the ash blocking baffle after the airflow collides with the ash blocking baffle, and falls down to an ash collecting box from the outlet of the third dust collector 103, so that ash accumulation on the inner wall of the third dust collector 103 is avoided, and because the rotating airflow cannot flow in the area of the ash blocking baffle, the dust is prevented from being lifted by the rotating airflow, secondary flying of the dust is prevented, and dust is convenient to collect.

In addition, it is also understood that a flow guide baffle (not shown) for guiding dust is installed in the cyclone dust collector, and dust entrained in the rotating airflow slides to an outlet of the cyclone dust collector along the flow guide baffle after hitting the flow guide baffle, so that dust is prevented from depositing on the inner wall of the cyclone dust collector.

In addition, as a modification, a vibrator (not shown) for providing vibration to promote the falling of dust on the inner wall of the dust collector is mounted on the outer wall of the third dust collector 103 and/or the fourth dust collector 104, so that dust is prevented from being deposited on the inner wall of the third dust collector 103 and/or the fourth dust collector 104 to reduce the dust collection effect.

As shown in fig. 8, as a modification, the vibration screening mechanism 14 may further adopt a structure in which the inclination angle is adjusted, and the modification differs from the above-described preferred embodiment only in that the vibration screening mechanism 14 further includes an adjusting screw 202 connected to the screen seat 143 for adjusting the inclination angle, and the bottom end of the adjusting screw 202 is movably connected to the base 10. It will be appreciated that the bottom end of the adjustment screw 202 may be connected to the vibration mount 145 in a hinged or embedded rotational connection. It will also be appreciated that when the bottom end of the adjusting screw 202 is hinged to the vibration base 145, the adjusting screw 202 is fixedly connected to the screen seat 143; when the bottom end of the adjusting screw 202 is connected with the vibration base 145 in an embedded rotating manner, the adjusting screw 202 is connected with the screen seat 143 in a threaded manner. The two elastic supporting members 148, the vibration base 145 and the screen seat 143 together constitute a four-bar linkage mechanism, the inclination angle of the four-bar linkage mechanism is adjusted by operating the adjusting screw 202 fixedly provided on the screen seat 143, and when the inclination of the four-bar linkage mechanism is adjusted, the inclination angle of the screen box 141 is also adjusted accordingly, so that the operation is very convenient. In addition, the vibratory screening mechanism 14 preferably further includes a locking member 203 for locking the adjustment screw 202. When the bottom end of the adjusting screw 202 is connected to the vibration base 145 in an embedded rotation manner, the adjusting screw 202 after the inclination angle is adjusted is locked by the locking member 203. Specifically, the locking member 203 locks the adjusting screw 202 by threads. It will be appreciated that when the bottom end of the adjusting screw 202 is hinged to the vibration base 145, a support bar may be used to support the adjusting screw 202 to fix the adjusting screw 202 after the inclination angle is adjusted. In addition, preferably, the vibrating screen further comprises an adjusting disc 204 arranged at the top end of the adjusting screw 202 and used for operating the adjusting screw 202, and by arranging the adjusting disc 204 at the top of the adjusting screw 202, the adjusting screw 202 can be operated more conveniently, so that the working efficiency is greatly improved. It will be appreciated that the second vibration member 144 is preferably connected to the vibration base 145 and is rotatable relative to the vibration base 145, specifically, by fixedly providing a socket 201 on the vibration base 145 for inserting the second vibration member 144, and the second vibration member 144 is rotatable in the socket 201. Specifically, the driving shaft of the second vibration member 144 is inserted into the socket 201, thereby limiting the second vibration member 144, and the end of the second vibration member 144 inserted into the socket 201 can also be rotated in the socket 201 when rotated along with the four-bar mechanism described above. It will be further appreciated that as a variant, the vibration base 145 is provided with an arcuate recess in which the drive shaft of the second vibration member 144 is received and retained, while the second vibration member 144 rotates with the four bar linkage.

As shown in fig. 9, the conveyor 15 is preferably a belt conveyor for transporting pure grains obtained after screening by the vibratory screening mechanism 14 to a higher position, such as at an entrance of a grain storage bin, and the conveyor 15 includes a third feeding port 151 for feeding grains, a first belt conveyor 152 for transporting grains to a higher position, a second belt conveyor 155 disposed above the first belt conveyor 152 in parallel with the first belt conveyor 152 for pressing grains onto the first belt conveyor 152, a first motor 158 for driving the first belt conveyor 152, and a second motor 159 for driving the second belt conveyor 155. The third feed inlet 151 is located above the feed end of the first belt conveyor 152, and the first belt conveyor 152 and the second belt conveyor 155 rotate in opposite directions. Specifically, the first belt conveyor 152 rotates counterclockwise and the second belt conveyor 155 rotates clockwise, thereby realizing that the conveying tracks of the second belt conveyor 155 and the conveying tracks of the first belt conveyor 152 clamp the grains between the conveying tracks of the two to be conveyed to a high place. It will be appreciated that the gap between the conveyor tracks of the first belt conveyor 152 and the conveyor tracks of the second belt conveyor 155 is between 0.2 cm and 3cm, preferably between 0.5 cm and 2cm, so that the conveyor tracks of the first belt conveyor 152 and the conveyor tracks of the second belt conveyor 155 can grip and convey the grain. It will be appreciated that the drive speeds of the first belt conveyor 152 and the second belt conveyor 155 may be the same or different. Preferably, the first belt conveyor 152 and the second belt conveyor 155 have the same driving speed, so that grains can be firmly gripped and conveyed. The transmission speed of the first belt conveyor 152 and the second belt conveyor 155 is 0.1m/s to 1m/s, preferably 0.2m/s to 0.5m/s. The inclination angle of the first belt conveyor 152 is 50 ° to 70 °, preferably 55 ° to 65 °, so that the grains can be smoothly transported to the high place when the inclination angle of the first belt conveyor 152 is within the angle range, and once the inclination angle of the first belt conveyor 152 is greater than the angle range, the grains may not be transported to the high place.

According to the belt conveyor disclosed by the invention, the two first belt conveyors 152 and the second belt conveyors 155 which are parallel to each other and have opposite rotation directions are arranged, so that the first belt conveyors 152 and the second belt conveyors 155 are used for clamping and conveying grains and conveying the grains in one direction, the conveying caterpillar of the second belt conveyors 155 is used for pressing the grains on the conveying caterpillar of the first belt conveyors 152, and the positive pressure applied to the grains perpendicular to the conveying direction of the first conveyor 2 is used for increasing the friction force of the first conveyor 2 to the upward transmission of the grains, so that the grains are conveyed to a high place, the grains can be conveyed to a higher position under a large inclination angle, the conveying length of the conveyor 15 is not required to be prolonged, the occupied area is small, and the production cost is reduced.

Further, a stopper 153 for preventing the grains from slipping is provided on the transfer track of the second belt conveyor 155, and further, the grains are prevented from slipping up and down on the first belt conveyor 152.

In addition, the belt conveyor further includes a cavity 1510 for providing a receiving function, and the first belt conveyor 152 and the second belt conveyor 155 are each received in the cavity 1510, and the first motor 158 and the second motor 159 are mounted on an outer wall of the cavity 1510. It will be appreciated that the first belt conveyor 152 and the second belt conveyor 155 are fixedly coupled to the inner wall of the chamber 1510. The cavity 1510 comprises a feeding cavity 1511, a transporting cavity 1512 and a discharging cavity 1513 which are communicated with each other, the feeding cavity 1511 is communicated with the third feeding port 151, the feeding end of the first belt conveyor 152 is positioned in the feeding cavity 1511 and below the third feeding port 151, and the discharging cavity 1513 is communicated with the outside. It will be appreciated that discharge chamber 1513 communicates with subsequent grain cleaning apparatus to transport grain to subsequent grain cleaning apparatus for further cleaning. The grain cleaning equipment is air-screen integrated grain cleaning equipment. It is understood that the second belt conveyor 155 is positioned above and parallel to the first belt conveyor 152, at least referring to the second belt conveyor 155 being positioned above and parallel to the first belt conveyor 152 within the transport cavity 1512.

It will be appreciated that the first belt conveyor 152 is a three-fold belt conveyor and the second belt conveyor 155 is a two-fold belt conveyor. The first belt conveyor 152 includes a first driving wheel 1521, a first driven wheel 1522, a second driven wheel 1523 and a third driven wheel 1524 connected by a transmission track, the first driving wheel 1521 is connected to an output shaft of the first motor 158, the first driving wheel 1521 is connected to the first driven wheel 1522 and the second driven wheel 1523, the first driven wheel 1522 is connected to the third driven wheel 1524, and the third driven wheel 1524 is connected to the second driven wheel 1523, and it can be understood that the wheels are connected by the transmission track. Wherein, first driving wheel 1521 and first driven wheel 1522 are located at the transition position of feeding cavity 1511 and transporting cavity 1512, second driven wheel 1523 is located in feeding cavity 1511, preferably located at the end of feeding cavity 1511 far away from transporting cavity 1512, and third driven wheel 1524 is located at discharging cavity 1513, so that first belt conveyor 152 has advantages of good conveying performance and high conveying efficiency. In addition, preferably, the first belt conveyor 152 further includes a limiting wheel 1525 disposed at a transition position between the feeding chamber 1511 and the transporting chamber 1512 and a transition position between the transporting chamber 1512 and the discharging chamber 1513, and the limiting wheel 1525 is used for limiting the conveying track of the first belt conveyor 152 at a transition position between adjacent chambers, so as to ensure stable conveying of the conveying track of the first belt conveyor 152, and further improve conveying performance of the first belt conveyor 152. The second belt conveyor 155 includes a second driving wheel 1551 and a fourth driven wheel 1552 connected by a transfer track, and the second driving wheel 1551 is connected with an output shaft of the second motor 159.

In addition, the belt conveyor further includes an angle adjustment mechanism 154 disposed on an outer wall of the cavity 1510 for adjusting the inclination angle α of the cavity 1510. The angle adjustment mechanism 154 is provided to facilitate adjustment of the conveying height of the belt conveyor to accommodate different discharge height requirements. It will be appreciated that adjusting the tilt angle α of the cavity 1510 via the angle adjustment mechanism 154, i.e., indirectly adjusts the tilt angles of the first belt conveyor 152 and the second belt conveyor 155. The angle adjusting mechanism 154 includes a supporting wheel 1541 for providing a supporting effect, a first connecting member 1542 and a second connecting member 1543 rotatably connected to the supporting wheel 1541, the first connecting member 1542 and the second connecting member 1543 are connected to the outer wall of the chamber 1510, and the inclination angle α of the chamber 1510 is adjusted by adjusting the angle β between the first connecting member 1542 and the second connecting member 1543. It is understood that the first connector 1542 and the second connector 1543 are rods or sticks. It will also be appreciated that both the first connector 1542 and the second connector 1543 are preferably hinged to the outer wall of the chamber 1510.

It will be appreciated that as a variation, the angle adjustment mechanism 154 is a height adjustment device for supporting the transport cavity 1512, the height adjustment device being any one of an adjustable height support, a hydraulic lift table, and a height adjustment bracket.

It will be appreciated that, as another modification, the first connecting member 1542 and the second connecting member 1543 are fixedly connected to the supporting wheel 1541, a plurality of clamping grooves (not shown) are provided on the outer wall of the cavity 1510, one end of the first connecting member 1542 and one end of the second connecting member 1543 may be clamped in the clamping grooves, and the inclination angle α of the cavity 1510 is adjusted by adjusting the positions of the clamping grooves clamped by the first connecting member 1542 and the second connecting member 1543. Preferably, a plurality of clamping grooves are uniformly arranged on the outer wall of the cavity 1510 at intervals.

It will be appreciated that, as another modification, the angle adjusting mechanism 154 may further include a wire roller (not shown), the wire roller is fixedly disposed on an outer wall of an upper end of the cavity 1510, a diagonal wire is wound in the wire roller, and the other end of the diagonal wire is fixedly disposed at a lower end of the cavity 1510, i.e. on an outer wall of an end of the feeding cavity 1511 far away from the transporting cavity 1512, and the inclination angle α of the cavity 1510 is adjusted by winding and unwinding the diagonal wire, so that the operation is very convenient.

In addition, the belt conveyor further comprises casters 157 disposed on the outer wall of the feed chamber 1511 for moving the belt conveyor, and the casters 157 are preferably universal wheels for facilitating adjustment of the direction of movement of the belt conveyor.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A grain cleaning apparatus, characterized in that:

the grain refining device comprises a feed hopper (11), a refining screening mechanism (12) which adopts vibrating refining to separate out impurities with larger radial sizes contained in grains and adopts an inclined structure design to refine the grains, a winnowing mechanism (13) which adopts a closed flow field to separate out light and heavy impurities contained in the grains, a vibrating screening mechanism (14) which is convenient for adjusting the inclined angle, a conveyor (15) which adopts a double conveyor to clamp the grains so as to convey the grains to a high place in a unidirectional manner, and a frame (17);

the feed hopper (11), the refining screening mechanism (12), the winnowing mechanism (13) and the vibration screening mechanism (14) are all fixed on the frame (17);

the feed hopper (11), the refining screening mechanism (12), the winnowing mechanism (13) and the vibration screening mechanism (14) are sequentially communicated;

the conveyor (15) is positioned below a discharge hole of the vibration screening mechanism (14);

The refining screening mechanism (12) comprises a first vibrating piece (123) used for screening grains, a grain transportation layer (124) used for carrying out refining transmission on the screened grains, a first feeding port (128) used for feeding, a sundry discharging port (121) used for outputting sundries and a grain discharging port (122) used for outputting the grains, wherein one end of the first vibrating piece (123) is communicated with the first feeding port (128), the other end of the first vibrating piece is communicated with the sundry discharging port (121), the grain transportation layer (124) is communicated with the grain discharging port (122), the first vibrating piece (123) is positioned above the grain transportation layer (124), an inclined part (127) is arranged at a position right below the first feeding port (128), and the inclined angle of the inclined part (127) is 15-60 degrees;

the grain transportation layer (124) is obliquely provided with a convex back part (126) for refining the screened grains in a region close to the first feeding port (128), the convex back part (126) comprises a first refining part (1212) and a second refining part (1211) which are connected, the first refining part (1212) is positioned right below the inclined part (127), and the inclination angle of the second refining part (1211) is larger than that of the first refining part (1212);

the vibration screening mechanism (14) comprises a screen box (141) for screening grains, a screen seat (143) for installing the screen box (141), a second vibrating member (144) fixedly arranged on the screen seat (143) and used for providing vibration, a vibrating base (145) used for providing vibration, a base (146) used for providing supporting function, and elastic supporting members (148) used for connecting the screen seat (143) and the vibrating base (145) and elastically supporting the screen seat (143), wherein at least two elastic supporting members (148) are arranged at intervals and elastically support the screen seat (143) on the vibrating base (145), the vibrating base (145) is arranged on the base (146), and the vibrating direction of the vibrating base (145) is parallel to the vibrating direction of the second vibrating member (144);

The vibration screening mechanism (14) further comprises a vibration direction normal supporting mechanism (147) used for limiting the screen seat (143) in the direction perpendicular to the vibration direction, the vibration direction normal supporting mechanism (147) is respectively connected with the screen seat (143) and the vibration base (145), the vibration direction normal supporting mechanism (147) comprises a roller (1472) fixed on the screen seat (143) and a supporting seat (1471) arranged on the vibration base (145) and used for supporting the roller (1472), the contact plane of the supporting seat (1471) and the roller (1472) is parallel to the vibration direction of the second vibration piece (144), the supporting seat (1471) is rotatable relative to the vibration base (145), and when the second vibration piece (144) drives the screen seat (143) to vibrate, the roller (1472) rolls up and down along the contact plane of the supporting seat (1471).

2. The grain cleaning apparatus of claim 1, wherein:

the winnowing mechanism (13) comprises a first fan (131) for compressing and conveying the airflow, a first dust remover (134) and a second dust remover (1314) for removing dust from the airflow, a winnowing box (132) for winnowing grains and a second feed inlet (1311) for feeding;

a second feed hopper (1311) is positioned above the winnowing box (132) and is communicated with the winnowing box;

the air outlet of the first fan (131) is respectively communicated with the air inlet of the air separation box (132) and the second dust remover (1314);

An air outlet of the air separation box (132) is communicated with an air inlet of the first fan (131) through the first dust remover (134);

the bottom of the winnowing box (132) is provided with a heavy impurity outlet (1310), a grain outlet (137) and a light impurity outlet (135) in sequence along the flowing direction of the air inlet flow.

3. A grain cleaning apparatus as claimed in claim 2, wherein:

the air separation box (132) further comprises a rectifying box (1312) which is arranged at the air inlet of the air separation box (132) and is used for adjusting the air direction when the air flow enters the air separation box (132).

4. The grain cleaning apparatus of claim 1, wherein:

one end of the vibration base (145) is rotatably connected with the base (146), and the other end is fixedly connected with the base (146) and the fixed position is adjustable.

5. The grain cleaning apparatus of claim 1, wherein:

the vibration screening mechanism (14) further comprises an adjusting screw (202) which is connected with the screen seat (143) and used for adjusting the inclination angle;

the bottom end of the adjusting screw (202) is movably connected with the vibration base (145).

6. The grain cleaning apparatus of claim 1, wherein:

the conveyor (15) comprises a third feed opening (151) for feeding the grains, a first belt conveyor (152) for transporting the grains to a high place, a second belt conveyor (155) which is arranged above the first belt conveyor (152) and parallel to the first belt conveyor (152) and is used for pressing the grains on the first belt conveyor (152), a first motor (158) for driving the first belt conveyor (152) and a second motor (159) for driving the second belt conveyor (155);

The third feed inlet (151) is positioned above the feed end of the first belt conveyor (152);

the first belt conveyor (152) and the second belt conveyor (155) rotate in opposite directions.