CN212216252U - Peanut pod vibration screening device and cleaning and impurity removing system - Google Patents

Abstract

The utility model discloses a peanut pod vibration screening plant and clean edulcoration system, include: the vibrating screen comprises a three-stage vibrating screen, namely a first-stage screen, a second-stage screen and a third-stage screen, wherein a first-stage screen baffle is arranged on the periphery of the first-stage screen, a sliding baffle is arranged on one side of the first-stage screen baffle, a first-stage screen discharge port is arranged on one side of the first-stage screen, the first-stage screen is obliquely arranged, and two ends of the first-stage screen are connected to the second-stage screen through a first-stage screen long-end connecting spring and a; the periphery of second grade screen cloth sets up second grade screen cloth baffle, and second grade screen cloth both ends are connected to tertiary screen cloth through two tertiary screen cloth long-end connecting spring, two tertiary screen cloth short-end connecting spring respectively, and one side of second grade screen cloth sets up the second grade screen cloth discharge gate. The technical scheme of the disclosure adopts multi-stage screening, which has important significance for improving the cleaning and impurity removing technology of peanuts and improving economic and economic benefits, and can obviously improve the cleaning and impurity removing effect of the peanuts.

Description

Peanut pod vibration screening device and cleaning and impurity removing system

Technical Field

The utility model belongs to the technical field of agricultural product processing, especially, relate to peanut pod vibration screening plant and clean edulcoration system.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

After the peanuts are picked by the peanut picker, stones, soil, stems, immature shrunken fruits and other impurities can be mixed in the peanuts, and the impurities can influence the subsequent fine processing link of the peanuts, so that clean peanuts need to be obtained through cleaning and impurity removal. Therefore, the cleaning and impurity removing process of the peanuts is the primary problem in the deep processing process of the peanuts.

At present, the cleaning and impurity removing device is mainly divided into three types according to the cleaning and impurity removing principle: screening, airflow cleaning and airflow screen cleaning. The device which singly uses screening or air current cleaning has the defects of high impurity rate of the screened peanuts, low efficiency of the device and the like; at present, the combination of the sieve and the air flow is widely used for separating and cleaning at the same time, but the combination of the sieve and the air flow is difficult in the design of the device.

The purpose in the peanut pod screening process is to separate peanuts from impurities, reduce the peanut loss rate and impurity content rate and improve the peanut grading effect, and the inventor finds that the existing peanut pod screening device has the following technical problems in research:

1. the cleaning rate is difficult to guarantee by adopting the design of a single-layer sieve, and residual stems and leaves in the peanuts cannot be removed, so that the subsequent deep processing of the peanuts is influenced.

2. Direct feed leads to the screening in-process peanut easily to pile up, and uses the single-deck sieve can not guarantee screening efficiency, and wind selector can not effectively get rid of flat fruit in the peanut and great to the damage of fan blade.

3. The sieve plate does unidirectional reciprocating motion, so that the sieving function of the sieve plate on the peanuts cannot be well exerted; the peanut separating device mainly separates peanuts and impurities according to different weights in the cleaning process, residual stems and leaves can enter the same bin along with peanut pods under the action of wind power, and a small amount of residual stems and leaves still exist in the separated peanuts.

Through the contrastive analysis to above-mentioned typical peanut cleaning plant, current peanut cleaning plant mainly has cleaning effect poor, screening effect shortcoming such as not good enough. In addition, most of the devices are directly fed, and an intermittent feeding mechanism is not arranged, so that the peanuts are easily accumulated in the cleaning process, and the screening efficiency is further influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of above-mentioned prior art, this disclosure provides peanut pod vibration screening device, can obviously improve the cleaning edulcoration effect of peanut.

In order to achieve the above object, one or more embodiments of the present disclosure provide the following technical solutions:

the peanut pod vibration screening device comprises a three-stage vibrating screen, namely a first-stage screen, a second-stage screen and a third-stage screen, wherein a first-stage screen baffle is arranged on the periphery of the first-stage screen, a sliding baffle is arranged on one side of the first-stage screen baffle, a first-stage screen discharge hole is formed in one side of the first-stage screen, the first-stage screen is obliquely arranged, and two ends of the first-stage screen are respectively connected to the second-stage screen through a first-stage screen long-end connecting spring and a second-stage screen;

a second-stage screen baffle is arranged on the periphery of the second-stage screen, two ends of the second-stage screen are respectively connected to the third-stage screen through a second third-stage screen long end connecting spring and a second third-stage screen short end connecting spring, and a second-stage screen discharge hole is formed in one side of the second-stage screen;

the periphery of the three-stage screen is provided with a three-stage screen baffle, one side of the three-stage screen is provided with a three-stage screen discharge hole, and the lower part of the three-stage screen is connected to the screen support disc through a screen support spring.

According to the further technical scheme, the three-stage vibrating screen is driven by a vibrating motor A and a vibrating motor B, and the two vibrating motors enable the three-stage vibrating screen to integrally perform complex rotation type vibration.

According to a further technical scheme, the two vibrating motors are respectively arranged on the upper side of the first-stage screen baffle, and the relative included angle between the rotating shafts of the two vibrating motors is 40 degrees.

The technical scheme is further that the primary screen and the tertiary screen are secondary screening layers, the inclination angle is 0-5 degrees, and the inclination angle of the secondary screen is 26.1-33.02 degrees.

According to a further technical scheme, the first-stage screen is an oval plane punching screen with the size of 25 x 15mm, the second-stage screen is an oval plane punching screen with the size of 17 x 6mm, and the third-stage screen is a round plane punching screen with the size of 8 mm.

According to a further technical scheme, the screen planes of the first-stage screen, the second-stage screen and the third-stage screen are of a concave structure.

On the other hand, to achieve the above object, one or more embodiments of the present disclosure provide the following technical solutions:

edulcoration system is selected to peanut pod includes:

the device comprises a feeding device, a winnowing device and a vibration screening device;

the feeding device intermittently feeds materials to the winnowing device;

the winnowing device carries out negative pressure adsorption on light impurities in the material in the process that the material slides onto the vibration screening device under the action of gravity;

the vibrating screening device comprises a three-stage vibrating screen which is respectively a first-stage screen, a second-stage screen and a third-stage screen, wherein a first-stage screen baffle is arranged on the periphery of the first-stage screen, a sliding baffle is arranged on one side of the first-stage screen baffle, a first-stage screen discharge hole is formed in one side of the first-stage screen, the first-stage screen is obliquely arranged, and two ends of the first-stage screen are respectively connected to the second-stage screen through a first-stage screen long-end connecting spring and a first-;

a second-stage screen baffle is arranged on the periphery of the second-stage screen, two ends of the second-stage screen are respectively connected to the third-stage screen through a second third-stage screen long end connecting spring and a second third-stage screen short end connecting spring, and a second-stage screen discharge hole is formed in one side of the second-stage screen;

the periphery of the three-stage screen is provided with a three-stage screen baffle, one side of the three-stage screen is provided with a three-stage screen discharge hole, and the lower part of the three-stage screen is connected to the screen support disc through a screen support spring.

According to a further technical scheme, the feeding device comprises a box body structure, the box body structure is a cavity structure, and the feeding box feeds materials into the cavity structure;

the upper transmission roller and the lower transmission roller are arranged up and down in the cavity structure, the upper transmission roller and the lower transmission roller control the distance between the upper transmission roller and the lower transmission roller through the tensioning mechanism, the tension between the transmission rollers is convenient to adjust, the upper transmission roller and the lower transmission roller drive the rubber conveyor belt on the upper transmission roller and the lower transmission roller to move, lifting hoppers are evenly arranged on two sides of the rubber conveyor belt at intervals respectively, and the upper transmission roller and the lower transmission roller are fixed on the rack through bearing supports.

According to the technical scheme, the feeding device is driven by a stepping motor, the stepping motor drives an upper transmission roller and a lower transmission roller to rotate so as to drive the conveying belt and further drive the hopper to carry out intermittent feeding, and the stepping motor drives the lower transmission roller and the upper transmission roller through the speed reduction of a small belt wheel, a V-shaped belt and a large belt wheel to drive the rubber conveying belt and the hopper on the rubber conveying belt to carry out digging feeding on materials.

According to the technical scheme, the hopper is made of flexible materials, the hopper is a deep hopper, the rear wall of the hopper is fixedly connected with the rubber conveying belt through a countersunk bolt, the hopper digs materials, and the materials are thrown out when moving to the top along with the rubber conveying belt.

According to a further technical scheme, the winnowing device consists of a positive pressure fan, a slide carriage and an adsorption pipeline, and the slide carriage is obliquely arranged to ensure that the peanuts can automatically slide downwards under the action of gravity and friction force;

positive pressure fan and adsorption pipeline produce negative pressure adsorption pressure, adsorption pipeline's outlet pipe mouth cross-section central line aligns with the carriage apron end, makes the peanut also can carry out the negative pressure adsorption to the peanut and clean at the in-process adsorption pipeline that falls the screen cloth down.

The above one or more technical solutions have the following beneficial effects:

the technical scheme disclosed by the invention adopts the combined use of winnowing adsorption and multi-stage screening, and has important significance for improving the cleaning and impurity removing technology of peanuts and improving economic and economic benefits. The screened material is divided into four parts, namely large impurities, peanut pods, shrunken peanuts and small impurities, and the four parts are respectively sent into different discharge ports to finish the adsorption screening and cleaning work. The adsorption type peanut pod cleaning and impurity removing system can obviously improve the cleaning and impurity removing effect of peanuts.

This system of this disclosure collects intermittent type pay-off, selection by winnowing and vibration screening as an organic whole, realizes intermittent type pay-off through material feeding unit, avoids the material to pile up, guarantees follow-up selection by winnowing and the orderly the going on of screening to the material, improves the whole efficiency of system.

The air separation device has large adsorption force, realizes negative pressure adsorption by using the positive pressure fan, and avoids the damage of adsorbed impurities to the fan blade. The vibrating screening device is driven by a vibrating motor with two rotating shafts at a certain angle, so that the screen body performs repeated rotation type vibration (the projections of the vibration track of the vibrating body on the horizontal plane and the vertical plane are both a circle or an ellipse), the movement dimension of the screen body is increased, and the screening effect and speed are improved. The shale shaker adopts the design of multilayer sieve, and is the installation of different angles respectively, can let the material produce "mobility" at the screening in-process and avoid the material to pile up, and screening efficiency is high.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.

FIG. 1 is an isometric view of an adsorption and multi-stage screening peanut pod cleaning and edulcoration system according to an embodiment of the present disclosure;

FIG. 2 is an isometric view of a feeding device according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a feeding device in an example embodiment of the present disclosure;

FIG. 4 is an internal view of a feeding device in an example embodiment of the present disclosure;

FIG. 5 is an exploded view of the interior of a feeding device in accordance with an exemplary embodiment of the present disclosure;

FIG. 6 is an isometric view of a feed device, a tension structure, in accordance with an embodiment of the present disclosure;

fig. 7 is a cross-sectional view of an air classification device according to an exemplary embodiment of the present disclosure;

fig. 8 is an isometric view of an air separation device in accordance with an exemplary embodiment of the present disclosure;

FIG. 9 is a full cross-sectional view of an adsorption duct in an example embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a Laval tube in accordance with an exemplary embodiment of the present disclosure;

FIG. 11 is a front view of a vibratory screening device in accordance with an example embodiment of the present disclosure;

FIG. 12 is an isometric view of a vibratory screening device according to an example of the present disclosure;

FIG. 13 is a full cross-sectional view of a vibratory screening device in accordance with an example embodiment of the present disclosure;

FIG. 14 is a graph illustrating the relationship of the centroid of the vibratory screen assembly vibratory trajectory in accordance with an example embodiment of the present disclosure;

FIG. 15 is a front view of a rack of an embodiment of the present disclosure;

FIG. 16 is an isometric view of a frame according to an example embodiment of the present disclosure;

FIG. 17 is a three-axis coordinate system view of a peanut pod of an example of the present disclosure;

in the figure, a feeding device I, an air separation device II, a vibration screening device III and a frame IV are arranged;

i-01-upper box body, I-02-middle box body, I-03-feeding box, I-04-lower box body, I-05-large belt wheel, I-06-tensioning mechanism, I-07-V-shaped belt, I-08-small belt wheel, I-09-stepping motor, I-10-bearing support, I-11-upper transmission roller, I-12-lifting hopper, I-1201-countersunk head bolt, 13-rubber transmission belt, I-14-lower transmission roller, I-0601-hexagonal bolt, I-0602 hexagonal nut and I-0603-spring washer.

II-01-slide carriage, II-02-positive pressure fan, II-03-adsorption pipeline, II-0301-reducing pipe, II-0302-expanding pipe and II-0303-eduction pipe.

III-0101-vibrating motor A, III-0102-vibrating motor B, III-02-first screen, III-0201-first screen baffle, III-0202-slide baffle, III-0203-first and second screen long end connecting spring, III-0204-first and second screen short end connecting spring, III-0205-first screen discharge port, III-03-second screen, III-0301-second screen baffle, III-0302-second and third screen long end connecting spring, III-0303-second and third screen short end connecting spring, III-0304-second screen discharge port, III-04-third screen, III-0401-third screen baffle, III-0402-third screen discharge port, III-0501-screen support disc, III-0502-Screen support spring.

IV-01-upper transmission roller bracket, IV-02-lower transmission roller bracket, IV-03-motor bottom plate, IV-04-first material collecting box, IV-05-screen supporting disc bottom plate, IV-06-second material collecting box, IV-07-collecting hopper and IV-08-winnowing fixing bracket.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.

Example of implementation 1

Referring to the attached drawings 11-13, the vibrating screen device is composed of three-stage vibrating screens, namely a first-stage screen III-02, a second-stage screen III-03 and a third-stage screen III-04, a first-stage screen baffle plate III-0201 is arranged on the periphery of the first-stage screen, a sliding baffle plate III-0202 is arranged on one side of the first-stage screen baffle plate, a first-stage screen discharge port III-0205 is arranged on one side of the first-stage screen, the first-stage screen is obliquely arranged, and two ends of the first-stage screen are connected to the second-stage screen through a first-stage screen long-end connecting spring III-0203 and a second-stage.

The periphery of the second-stage screen is provided with a second-stage screen baffle plate III-030, two ends of the second-stage screen are respectively connected to the third-stage screen through a second-third-stage screen long end connecting spring III-0302 and a second-third-stage screen short end connecting spring III-030, and one side of the second-stage screen is provided with a second-stage screen discharge port III-0304.

The periphery of the three-stage screen is provided with a three-stage screen baffle plate III-0401, one side of the three-stage screen is provided with a three-stage screen discharge port III-0402, and the lower part of the three-stage screen is connected to a screen supporting disc III-0501 through a screen supporting spring III-0502.

In this example, the vibratory screening device is composed of three stages of vibratory screens, and a discharge port is connected in each stage of vibratory screen, so that screened materials can fall into different positions conveniently. The materials slide down from the slide carriage II-01 and then are received by the sliding baffle III-0202 to fall into the first-stage screen III-02, impurities larger than peanut pod particles are filtered out through screening, the impurities slide into the first material receiving box IV-04 from the discharge hole III-0205 of the first-stage screen, and the peanut pod, the peanut shrunken fruits and small particle impurities fall into the second-stage screen III-03. And (3) filtering out peanut pods through the secondary screen III-03, collecting the peanut pods after the peanut pods slide out of a discharge port III-0304 of the secondary screen, and enabling the shrunken peanuts and small particle impurities to fall into the tertiary screen III-04. And small particle impurities are filtered out through the screening of the third-level screen III-04, the impurities fall from the third-level screen III-04, are collected through a collecting hopper IV-07 and fall into a first collecting hopper IV-04 and a second collecting hopper IV-05, and crushed peanuts fall from the third-level screen to a discharge port III-0402 of the third-level screen to finish the cleaning work of the materials.

The whole vibrating screen device is driven by a vibrating motor A III-0101 and a vibrating motor B III-0102, the two vibrating motors enable the whole three-level vibrating screen to perform complex rotation type vibration, and the installation mode of the two vibrating motors is as follows: the two vibrating motors are respectively arranged at two sides of the vibrating equipment, and the rotating shafts of the vibrating motors are in a set installation angle.

The vibratory screening device vibratory trajectory centroid relationship is shown in figure 14.

The two bottom foot mounting type vibration motors adjust the inclination angle of the rotating shaft of the vibration motor through nuts.

In order to facilitate discharging, the first-level screen and the second-level screen in the vibrating screening device are oval plane punching screens, and the third-level screen is a circular plane punching screen.

In order to avoid the gathering of materials to the edge in the vibration screening process, the plane of each layer of screen mesh can be subjected to concave treatment, and baffles are arranged around each layer of screen mesh to prevent the materials from being thrown out in the vibration process.

In order to avoid dust generated in the process of vibrating and screening materials, the whole device is sealed by a transparent plate, and meanwhile, the working condition inside the system can be observed.

Example two

Referring to the attached drawing 1, the embodiment discloses an adsorption and multi-stage screening type peanut pod cleaning and impurity removing system, which comprises a feeding device I, a winnowing device II, a vibrating screening device III and a rack IV, wherein the feeding device is positioned at the sides of the winnowing device and the vibrating screening device, and the winnowing device is positioned above the vibrating screening device; the feeding device I, the winnowing device II and the vibrating screening device III are all fixed on the rack.

The upper transmission roller I-11 and the lower transmission roller I-14 fix the feeding device I on the frame IV through the bearing support I-10, and the feeding device sends the materials to a slide carriage II-01 of the winnowing device II. The air separation device II is fixed on a positive pressure fan fixing support IV-08 through a fixing bolt, the air separation device adsorbs and cleans residual peanut stems and leaves in the material, and the adsorbed material falls into a first-stage screen III-02 of the vibration screening device III. A screen mesh supporting disc III-0501 in the vibrating screening device is connected with a screen mesh supporting disc bottom plate IV-05 through a fixing bolt to fix the vibrating screening device on a rack, materials are screened in a first-level screen mesh III-02, a second-level screen mesh III-03 and a third-level screen mesh III-04 respectively and discharged from a first-level screen mesh discharge port III-0205, a second-level screen mesh discharge port III-0304 and a third-level screen mesh discharge port III-0402 respectively, and the screening process is completed.

In a specific embodiment, referring to fig. 2-5, the feeding device comprises a box structure, the box structure comprises an upper box I-01, a middle box I-02 and a lower box I-04 arranged in sequence from top to bottom to form a cavity structure, the feeding box I-03 feeds the material into the cavity structure, an upper transmission roller I-11 and a lower transmission roller arranged up and down are arranged in the cavity structure, the upper transmission roller and the lower transmission roller control the distance between the upper transmission roller and the lower transmission roller through a tensioning mechanism I-06 to adjust the tension between the transmission rollers, the upper transmission roller and the lower transmission roller drive a rubber conveyor belt I-13 thereon to move, lifting hoppers I-12 are respectively arranged at uniform intervals on two sides of the rubber conveyor belt I-13, and the feeding device I is fixed on the rack by the upper transmission roller I-11 and the lower transmission roller I-14 through a bearing support I-10 IV.

The feeding device I is driven by a stepping motor I-09, and the feeding speed can be controlled by using the stepping motor I-09. The stepping motor drives the upper and lower transmission rollers to rotate so as to drive the conveying belt to drive the hopper to carry out intermittent feeding, and the stepping motor I-09 drives the lower transmission roller I-14 through the speed reduction of the small belt wheel I-08, the V-shaped belt I-07 and the large belt wheel I-05 and is combined with the upper transmission roller I-11 to drive the rubber conveying belt I-13 and the hopper I-12 on the rubber conveying belt to carry out digging feeding on materials. The hopper I-12 is made of flexible materials, is a deep hopper, the rear wall of the hopper is fixedly connected with the rubber conveyor belt through a countersunk head bolt I-1201, the hopper digs materials from the blanking box I-04 and the feeding box I-03, and the materials are thrown out when moving to the top along with the rubber conveyor belt.

Referring to fig. 6, the tensioning mechanism of the feeding device is composed of a bearing support I-10, two hexagon bolts I-0601, three hexagon nuts I-0602 and four spring washers I-0603, can control the distance between an upper transmission roller and a lower transmission roller, and is convenient for adjusting the tension between the transmission rollers.

A lifting hopper in the feeding device is of a deep hopper structure, the rear wall of the lifting hopper is connected with a conveying belt through countersunk bolts, the edge of the lifting hopper is subjected to flexible treatment, and damage to materials is avoided.

An upper transmission roller and a lower transmission roller of the feeding device are fixed on the frame by using bearing supports, and the bearing supports for fixing the transmission rollers below are provided with screw type tensioning mechanisms for adjusting the tension of the traction components.

Referring to the attached drawings 7 and 8, the winnowing device II comprises a positive pressure fan II-02, a slide carriage II-01 and an adsorption pipeline II-03, wherein the slide carriage is inclined at a certain angle to ensure that the peanuts can automatically slide down under the action of gravity and friction force. The air separation adsorption device uses the positive pressure fan and the adsorption pipeline to generate negative pressure adsorption pressure, and the section center line of the outlet pipe opening of the adsorption pipeline is aligned with the tail end of the slide carriage, so that the adsorption pipeline can also perform negative pressure adsorption cleaning on peanuts in the process that the peanuts fall onto the screen.

Referring to fig. 9 and fig. 10, the following describes the design principle of the adsorption pipeline in detail, and the adsorption pipeline II-03 is designed based on the laval pipe principle and mainly includes: reducer II-0301, expander II-0302 and eduction tube II-0303. The principle of negative pressure adsorption of the adsorption pipeline is as follows: the reducing pipe is contracted to a laryngeal knot, the area of the cross section is gradually reduced, and the airflow generated by the positive pressure fan is gradually accelerated; the cross-sectional area of the expansion pipe is gradually increased from the laryngeal prominence, and the airflow can continue to accelerate at the moment. Under the condition of not considering gravitational potential energy, the higher the flow velocity of wind, the smaller the wind pressure is, so that the wind pressure at the throat is smaller than the external atmospheric pressure, and the wind pressure is gradually reduced in the expansion pipe. The pressure at the throat junction is lower than the pressure in the outer extension pipe, a certain suction effect is generated on the gas flow in the pipe, and negative pressure is formed in the pipe. The higher the flow velocity at the throat, the larger the vacuum degree in the negative pressure pipe, and the larger the air separation suction force on the sorted materials.

Referring to fig. 15 and 16, the frame comprises a frame body, wherein an upper transmission roller support IV-01 and a lower transmission roller support IV-02 for installing and fixing an upper transmission roller and a lower transmission roller are respectively arranged at the upper part and the lower part of one side of the frame body, a winnowing fixing support IV-08 for installing a winnowing device is arranged at the upper end of the frame body, a motor bottom plate IV-03, a screen mesh supporting disc bottom plate IV-05 and a collecting hopper IV-07 are arranged at the lower part of the frame body, and a first collecting hopper IV-04 and a second collecting hopper IV-06 can be arranged below the collecting hopper.

The frame is provided with a support bracket and a positioning bottom plate for supporting or positioning each device. The whole vibrating screening device and the rack are provided with a certain gap, so that the screening device is prevented from colliding with the rack in the moving process. The first material receiving box IV-04 and the second material receiving box IV-06 are not integrated with the machine frame, and the collected peanut impurities can be manually processed after the material is received.

The working principle of the adsorption and multi-stage screening type peanut pod cleaning and impurity removing system is as follows:

the feeding box of the feeding device is fed with the peanut pods, and the stepping motor drives the lifting hopper on the conveyor belt to intermittently lift and feed the peanut pods. The material is carried on the carriage apron, slides downwards under the effect of self gravity, and in the gliding process, the winnowing device adsorbs light impurities such as residual stems and leaves in the material. The materials after being winnowed and absorbed enter a first-stage screen mesh driven by a vibrating motor, and the vibrating motor drives the screen mesh to do repeated rotation type vibration through the support at the bottom so as to achieve the purpose of screening the materials. The screened material is divided into four parts, namely large impurities, peanut pods, shrunken peanuts and small impurities, and the four parts are respectively sent into different discharge ports to finish the adsorption screening and cleaning work. Then, the work flow is repeated for each station.

The feeding speed of the lifting hopper is controlled by controlling the rotating speed of the stepping motor, so that intermittent feeding is realized; the winnowing device designed based on the Laval tube principle performs negative pressure adsorption on light impurities such as dry stems and leaves in the material in the process that the material slides down from the slide carriage to the screen under the action of gravity; drive by vibrating motor among the screening plant, design the multilayer screen cloth and adopt different installation angle, use spring coupling between the screen cloth, the vibration of each layer screen cloth of buffering, on the whole spring coupling that passes through of screen cloth bottom to the frame, for the vibration provides the fixed stay point, each layer screen cloth sets up the discharge gate of different positions respectively.

EXAMPLE III

The purpose of this embodiment is to provide an adsorption and multi-stage screening formula peanut pod cleaning edulcoration system's working method, includes:

intermittent feeding of a clinker device;

in the process that the material slides down under the action of gravity, the winnowing device carries out negative pressure adsorption on light impurities in the material;

and (4) multi-stage screening, wherein the material generates fluidity in the screening process, and impurities larger than peanut pod particles, peanut pods, shrunken peanuts and small particle impurities are respectively screened out and discharged from discharge holes at different positions.

The slide carriage of the winnowing device inclines at a certain angle, so that the peanuts can automatically slide down under the action of gravity and friction force.

Determination of the inclined angle of the slide:

taking the friction coefficient of the material and the slide carriage as mu-0.49-0.65

mgsinθ≥μmgcosθ

Namely: sin theta is not less than mu cos theta

So that the inclined angle theta of the slide carriage is 26.1-33.02 DEG

When the adsorption pipeline is designed, the method can be obtained on the same contour line by Bernoulli theorem and a continuity equation:

S₁V₁＝S₂V₂＝Q

in the formula, V₁Is the average velocity at the fan inlet cross section; p₁Is the average pressure at the inlet cross section of the fan; s₁The cross section of the inlet of the fan is the sectional area; v₂Is flat at the section of the throatThe average speed; p₂Is the average pressure at the throat section; s₂The sectional area of the throat section is shown; ρ is the air density.

Formula of wind pressure and wind speed: w-0.5 ρ V²+C

In the formula, W is wind pressure, rho is air mass density, V is wind speed, and C is a constant.

When V is₁Less than V₂When is, P₁Less than P₂. The air flow entering the pipeline is accelerated to a certain degree, so that the air flow velocity of the throat is higher than that of the inlet, and the air pressure and the air velocity are in inverse proportion, so that the pressure value of the throat is lower than that of the inlet.

Determining the size parameters of the adsorption pipeline:

the reason why the residual stems and leaves in the material can be adsorbed by the pipeline is that the floating speed of the full peanut pods is different from that of the residual dry stems and leaves. Firstly, the floating speed of the inlet of the eduction tube is determined to determine the wind pressure and the wind speed at the throat junction, and the size of the adsorption pipeline can be determined by establishing a streamline equation.

ρ_T＝ρ_T/(R×T_T)

In the formula, T₁Is the temperature of the working medium at the inlet of the laval tube, K; g is mass flow, Kg/s; a. the₂Is a critical cross-sectional area of mm²；V₀At the initial speed, m/s (set to 20). Find A₂＝12.6cm²。

The stent size can be calculated by the following formula:

in the formula, M_aIs Mach number; p_CIs the outlet gas pressure, P_a(P_CSet to 1 atmosphere); p_TIs the pressure of the working medium at the inlet of the nozzle, P_a(set to 7X 10)⁵)；A₁Is the cross section area of the inlet of the reducing pipe in cm²；A₃For expanding the cross-sectional area of the outlet of the tube, cm²(ii) a Find A₁＝339.8cm²。

Calculation of the stent angle:

the value obtained was 12 °.

Calculating the length of the expansion pipe:

calculation of shrinkage angle of the shrink tube:

the contraction section accelerates the gas to sound velocity in a subsonic state, the cone angle is 30-60 degrees for stable acceleration of the gas flow, the over-large gas flow is unstable, the over-small gas flow acceleration distance is too long, the energy loss is increased, and the cone angle is 30 degrees.

Designing an eduction tube:

the eduction tube is connected with the throat junction of the adsorption pipeline, and the three fork positions can generate local energy loss h_w：

h_w＝∑h_f+∑h_j

Wherein, Σ h_f: on-way energy loss, ∑ h_j: local energy loss: local head loss coefficient (dimensionless), λ: coefficient of loss of head along the way, L: length of pipe, d: pipe diameter, v: flow rate of fluid, g: acceleration of gravity.

And establishing a finite element analysis model according to an energy loss equation, and analyzing to obtain that when the included angle between the eduction tube and the axis of the expansion tube is 50 degrees, the wind pressure value at the throat junction is minimum, and the energy loss in the pipeline is small at the moment. The leading-out pipe is communicated with the reducing pipe and the expanding pipe, in order to ensure the adsorption effect, the cross section of the leading-out pipe structure is trapezoidal, and the area of the cross section is gradually increased outwards from the laryngeal prominence. The distance between the plane of the air inlet of the outlet pipe and the plane of the slide carriage is designed to be 3 cm.

The two vibrating motors are installed in the following modes: the two vibrating motors are respectively arranged at two sides of the vibrating equipment, and the rotating shafts of the vibrating motors are in a set installation angle. A graph of the centroid of the vibratory screen assembly is shown in FIG. 14, and a three axis coordinate of peanut pods is shown in FIG. 17.

Determination of the installation angle:

the mass of the two vibration motors is M₁Having a center of mass of (X)₁，Y₁) The overall quality of the vibration screening device is M, the mass center is (X, Y), and a coordinate system is established according to the supporting points to obtain:

in the formula, theta is a vibration direction angle, rad; delta gamma is the phase difference angle, rad, when the two motor eccentric blocks reach self-synchronizing stable operation; beta is the angle between the motor shaft and the horizontal plane, rad.

The expression for the force center trajectory is:

in the formula, N is 3 which is the ratio of the centrifugal force generated by the two motor eccentric blocks; and L is 340mm which is the distance between the vibration axes of the two motors.

The solution is carried out to obtain β ═ 20 °, i.e.: the vibrating screening device can be driven to perform repeated rotation type vibration when the relative included angle between the rotating shafts of the two vibrating motors is 40 degrees.

Determining parameters of the vibration screening device:

1. amplitude of vibration

The formula for the amplitude is:

in the formula, m_eThe total exciting moment generated for the vibrating motor; and M is the total mass of the vibrating screen.

The eccentric mass of two vibration motors is set as 20kg, and when the vibration motor is in elliptical vibration, the torque ratio is 3: 1, the eccentricity is 0.1m, and the amplitude lambda is 2.5mm

2. Frequency of vibration

The vibration frequency plays an important role in the efficiency of the vibrating screen, and experiments show that the screening efficiency is better to be near 22Hz for particles with various separation particle sizes. The thing of screening hardly has been thrown up during the low frequency, and granule like the smoke and dust generally is full of whole sieve case during the high frequency, no matter be high frequency screening or low frequency screening, and screening efficiency all is on the low side. Because the actual production material condition is different, the vibration frequency is adjusted slightly according to the actual condition of work, makes the shale shaker more efficient put into production work.

3. Angle of inclination of the screening surface

The angle between the screen surface and the horizontal plane is called the screen surface inclination angle alpha. The size of the screen surface angle is closely related to the screening quantity and the screening efficiency of the vibrating screen. When the angle is increased, the moving speed of the materials on the screen surface is increased, the processing capacity is increased, but the retention time of the materials on the screen surface is shortened, and the screening efficiency is reduced. On the contrary, the angle is reduced, the productivity is reduced, but a better screening effect can be obtained.

The primary screen and the tertiary screen are secondary screening layers, and the inclination angle is 0-5 degrees;

the secondary screen cloth is the main screening layer, refers to the inclination of carriage apron, so the inclination of this layer of screen cloth is: theta is 26.1-33.02 DEG

4. Angle of direction of vibration

The angle between the direction of vibration and the screen surface is called the direction of vibration angle beta. Beta is selected according to the properties of the screened materials, and the vibration direction angle beta of the materials which are easy to screen is preferably large. In general, the value of the moving sieve is 30-60 ° because the vibrating sieve has good applicability, good moving speed and high productivity in the range of direction angles.

5. Throw index

The throwing index D is the ratio of the vertical component of the maximum vibration acceleration of the equipment to the gravity acceleration g during vibration, and directly reflects the phase difference between the highest point and the lowest point of motion under the action of the resultant force of periodic throwing force generated by vibration and self gravity when a screened material contacts a screen during vibration. The phase relation of the high point and the low point directly influences the height of the sieving rate and the material handling capacity of the vibrating sieve.

Wherein K is mechanical vibration strength; omega is the rotation angular speed of the motor; λ is amplitude; is the vibration direction angle; alpha is alpha₀Is the screen face inclination angle.

Determining the throwing index D of the vibration separation device to be 4.3

6. Screen mesh size

Fig. 17 shows a three-axis coordinate system diagram for peanut pods, which is measured by an experimental method and averaged to obtain three-axis dimensions of different varieties of peanut pods:

the length H is 32.16mm-36.35mm

The width W is 12.34mm-15.17mm

The thickness H is 12.42mm-15.71mm

The geometric mean calculation formula of the defined peanuts is as follows:

in the formula, D_gThe geometric mean value of the peanuts; l is the length of the peanut; w is the width of the peanut; h is the height of the peanuts, and the unit of H is mm.

Defining the arithmetic mean calculation formula of peanuts as follows:

geometric mean of peanut pods D_g17.72mm-20.13mm, arithmetic mean D_aIs 20.35mm-21.36 mm.

The primary screen size value ensures the maximum size of the peanut pods, the secondary screen size value ensures the minimum size of the peanut pods, and the tertiary screen ensures the minimum size of the shrunken peanuts, where 50% of the full peanut pod size value is defined as the shrunken peanut size value. Because the plane punching screen is suitable for selection and screening and has obvious screening effect, the first-stage screen III-02 selects the oval plane punching screen with the size of 25 multiplied by 15mm and the second-stage screen III-03 selects the oval plane punching screen with the size of 17 multiplied by 6mm according to the appearance shapes of full peanut pods and shrunken peanuts and the three-axis size of the peanut pods. And the third-stage screen III-04 selects a circular plane punching screen with the diameter of 8 mm. The periphery of each layer of screen is provided with a baffle to prevent the materials from being thrown out in the screening process.

The screens of each stage are connected by springs for absorbing shock, the springs being selected to have sufficient stiffness to prevent the screen deck from being tilted too much in one direction.

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

Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.

Claims (10)

1. Peanut pod vibration screening device is characterized by comprising a three-stage vibration screen which is respectively a first-stage screen, a second-stage screen and a third-stage screen, wherein a first-stage screen baffle is arranged on the periphery of the first-stage screen, a sliding baffle is arranged on one side of the first-stage screen baffle, a first-stage screen discharge port is arranged on one side of the first-stage screen, the first-stage screen is obliquely arranged, and two ends of the first-stage screen are respectively connected to the second-stage screen through a first-stage screen long-end connecting spring and a second-stage;

a second-stage screen baffle is arranged on the periphery of the second-stage screen, two ends of the second-stage screen are respectively connected to the third-stage screen through a second third-stage screen long end connecting spring and a second third-stage screen short end connecting spring, and a second-stage screen discharge hole is formed in one side of the second-stage screen;

the periphery of the three-stage screen is provided with a three-stage screen baffle, one side of the three-stage screen is provided with a three-stage screen discharge hole, and the lower part of the three-stage screen is connected to the screen support disc through a screen support spring.

2. The peanut pod vibratory screening apparatus of claim 1, wherein said tertiary shaker is driven by a vibratory motor a and a vibratory motor B, both vibratory motors causing the tertiary shaker to vibrate in a generally compound-rotation manner.

3. The apparatus according to claim 2, wherein said two vibratory motors are mounted on the upper side of the primary screen retainer, respectively, and the relative angle between the axes of rotation of the two vibratory motors is 40 °.

4. The peanut pod vibratory screening apparatus of claim 1, wherein said primary and tertiary screens are secondary screening layers inclined at an angle of 0-5 ° and said secondary screens are primary screening layers inclined at an angle θ of 26.1 ° -33.02 °.

5. The peanut pod vibratory screening apparatus of claim 1, wherein said primary screen is a 25 x 15mm oval flat screen, said secondary screen is a 17 x 6mm oval flat screen, and said tertiary screen is an 8mm round flat screen.

6. The peanut pod vibratory screening apparatus of claim 1, wherein the screen planes of said primary, secondary and tertiary screens are of a concave configuration.

7. Edulcoration system is selected to peanut pod, characterized by includes:

the device comprises a feeding device, a winnowing device and a vibration screening device;

the feeding device intermittently feeds materials to the winnowing device;

the winnowing device carries out negative pressure adsorption on light impurities in the material in the process that the material slides onto the vibration screening device under the action of gravity;

the vibrating screening device comprises a three-stage vibrating screen which is respectively a first-stage screen, a second-stage screen and a third-stage screen, wherein a first-stage screen baffle is arranged on the periphery of the first-stage screen, a sliding baffle is arranged on one side of the first-stage screen baffle, a first-stage screen discharge hole is formed in one side of the first-stage screen, the first-stage screen is obliquely arranged, and two ends of the first-stage screen are respectively connected to the second-stage screen through a first-stage screen long-end connecting spring and a first-;

a second-stage screen baffle is arranged on the periphery of the second-stage screen, two ends of the second-stage screen are respectively connected to the third-stage screen through a second third-stage screen long end connecting spring and a second third-stage screen short end connecting spring, and a second-stage screen discharge hole is formed in one side of the second-stage screen;

the periphery of the three-stage screen is provided with a three-stage screen baffle, one side of the three-stage screen is provided with a three-stage screen discharge hole, and the lower part of the three-stage screen is connected to the screen support disc through a screen support spring.

8. A peanut pod cleaning and decontamination system as claimed in claim 7, wherein the feeding device comprises a box structure, the box structure being a cavity structure, the feed bin feeding the material into the cavity structure;

the upper transmission roller and the lower transmission roller are arranged up and down in the cavity structure, the upper transmission roller and the lower transmission roller control the distance between the upper transmission roller and the lower transmission roller through the tensioning mechanism, the tension between the transmission rollers is convenient to adjust, the upper transmission roller and the lower transmission roller drive the rubber conveyor belt on the upper transmission roller and the lower transmission roller to move, lifting hoppers are evenly arranged on two sides of the rubber conveyor belt at intervals respectively, and the upper transmission roller and the lower transmission roller are fixed on the rack through bearing supports.

9. A peanut pod cleaning and impurity removing system as claimed in claim 7, wherein the feeding device is driven by a stepper motor, the stepper motor drives the upper and lower transmission rollers to rotate so as to drive the conveyor belt and further drive the hopper to perform intermittent feeding, the stepper motor drives the lower transmission roller through the speed reduction of the small belt wheel, the V-shaped belt and the large belt wheel and combines with the upper transmission roller to drive the rubber conveyor belt and the hopper thereon to perform digging feeding on the material;

according to the technical scheme, the hopper is made of flexible materials, the hopper is a deep hopper, the rear wall of the hopper is fixedly connected with the rubber conveying belt through a countersunk bolt, the hopper digs materials, and the materials are thrown out when moving to the top along with the rubber conveying belt.

10. A peanut pod cleaning and impurity removing system as claimed in claim 7, wherein the air separation device is composed of a positive pressure fan, a chute and an adsorption pipeline, the chute is arranged obliquely to ensure that the peanuts can slide down automatically under the action of gravity and friction force;

positive pressure fan and adsorption pipeline produce negative pressure adsorption pressure, adsorption pipeline's outlet pipe mouth cross-section central line aligns with the carriage apron end, makes the peanut also can carry out the negative pressure adsorption to the peanut and clean at the in-process adsorption pipeline that falls the screen cloth down.

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