CN110732479A - walnut screening machines - Google Patents

Abstract

The invention discloses a walnut screening machine and aims to provide a walnut screening machine with high screening efficiency. It includes a frame, a sieve drum rotatably installed on the frame, a feed trough fixed on the frame and located at the feeding port of the sieve drum, and an outlet fixed on the frame and located under the sieve drum and at the discharge end. A material chute, and a power device for driving the rotation of the sieve drum; the sieve drum is divided into multiple sections, and the sieve hole diameter of each section of the sieve drum increases sequentially from the feeding port to the other end; the inner wall of the sieve drum is provided with a spiral shape The screw conveyor blade; on the frame, located on the upper part and/or side of the outer wall of the sieve drum, a drum is rotated; the axis of the drum is parallel to the sieve drum, and the wall surface of the drum is close to the outer wall surface of the sieve drum; the The length of the drum is not shorter than the length of the screen area on the screen drum. The invention is suitable for screening and use of various walnuts.

Description

A walnut screening machine

technical field

The invention relates to the technical field of screening equipment, in particular to a walnut screening machine.

Background technique

Walnuts are produced in many provinces in China. Distributed in Central Asia, West Asia, South Asia and Europe. Born in the hillsides and hilly areas at an altitude of 400-1800 meters, it is commonly cultivated in the plains and hilly areas of China. Seeds have high oil content and can be eaten raw or by oil extraction; the wood is solid and is a good hardwood material. Along with almonds, cashews, and hazelnuts, it ranks as one of the top four dried fruits in the world. As a kind of nut that is loved by the majority of people, walnut is rich in nutritional value and high in edible value. It contains 15-20 grams of protein per hectogram, and contains various trace elements and minerals such as calcium, phosphorus and iron necessary for the human body. As well as carotene, riboflavin and other vitamins, which are beneficial to the human body and can strengthen the brain. After walnuts are harvested, they are generally screened according to their size, and walnuts within a certain diameter range are screened to achieve product classification; currently, manual screening and mechanical screening are mainly used. Manual screening not only consumes manpower and time, but also makes the efficiency very low. The existing walnut screening equipment has the following shortcomings: (1) During walnut screening, walnuts will be stuck on the sieve holes, causing the sieve holes to be blocked, resulting in a significant reduction in the screening efficiency. It needs to be cleaned by manual knocking, which is easy to clean. Causes walnuts to break.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a walnut screening machine with high screening efficiency and automatic screen hole cleaning.

In order to solve the above-mentioned technical problems, the present invention is achieved through the following technical solutions:

A walnut screening machine, comprising a frame, a sieve drum rotatably installed on the frame, a feed trough fixed on the frame and located at the feeding port of the sieve drum, fixed on the frame and located below the sieve drum and the discharge chute at the discharge end, and the power device that drives the rotation of the screen cylinder; the screen cylinder is divided into multiple sections, and the sieve hole diameter of each section of the screen cylinder increases sequentially from the feeding port to the other end; The inner wall is provided with a helical screw conveying blade; on the frame, the upper part and/or the side of the outer wall of the sieve drum is rotated and provided with a drum; the axis of the drum is parallel to the sieve drum, and the wall surface of the drum is close to the sieve drum. The outer wall surface; the length of the drum is not shorter than the length of the sieve area on the sieve drum.

Preferably, the drum is a multi-segment drum segment, which is rotated and installed on the frame in sequence.

Preferably, the drum is a multi-segment drum segment, the multi-segment drum segment is divided into two groups, and the two groups of drum segments are symmetrically located on both sides of the upper part of the screen drum and are arranged in dislocation.

Preferably, the drum is connected to the frame through a swing arm, the swing arm is hinged with the frame, and the drum is attached to the outer wall surface of the screen drum by its own gravity.

Preferably, it also includes a self-locking running wheel rotatably mounted on the lower end of the frame.

Preferably, the power device includes a motor mounted on the frame, a ring gear sleeved on the drum, a gear mounted on the frame through a gear shaft and meshed with the ring gear, and drivingly connected to the motor output shaft and the gear shaft pulley mechanism.

Preferably, the screen drum is connected to the frame through a tug mechanism.

Compared with the prior art, the present invention has the following advantages:

The invention adopts the drum to abut on the outer wall of the sieve cylinder, effectively pushes out the walnuts stuck in the sieve holes, realizes the regular cleaning of the sieve holes, and effectively ensures that the screening efficiency is not reduced. And the walnuts stuck in the sieve holes are pushed out by the roller extrusion, and the walnuts are not easily broken, which can effectively reduce the crushing rate of walnut screening.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a top view of FIG. 1 .

FIG. 3 is a rear view of FIG. 1 .

FIG. 4 is a left side view of FIG. 1 .

FIG. 5 is a right side view of FIG. 1 .

FIG. 6 is an enlarged cross-sectional view of A-A in FIG. 1 .

FIG. 7 is an enlarged cross-sectional view of B-B in FIG. 1 .

FIG. 8 is a schematic structural diagram of a screw conveyor blade.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. In the following description, in order to clearly show the structure and working mode of the present invention, it will be described with the aid of many directional words on the basis of the accompanying drawings, but "front", "rear", "left", "right", Words such as "up" and "down" are to be understood as convenient terms, and should not be understood as restrictive words.

The walnut screening machine shown in Figures 1-8 includes a frame 1, a sieve drum 2 that is rotatably installed on the frame 1, and a feeding chute 3 that is fixedly connected to the frame 1 and located at the feeding port of the sieve drum 2, The discharge chute 4, which is fixed on the frame 1, is located below the screen cylinder 2 and at the discharge end, and the power device 5 that drives the screen cylinder 2 to rotate; the screen cylinder 2 is divided into multiple sections, and the screen of each section of the screen cylinder The hole diameter increases in turn from the feeding port to the other end; the inner wall of the sieve cylinder 2 is provided with a helical screw conveying blade 6; the frame 1 is located on the upper part of the outer wall of the sieve cylinder 2 and is rotated and provided with a drum 7; The axis of the drum 7 is parallel to the screen drum 2 , and the wall surface of the drum 7 is close to the outer wall surface of the screen drum 2 ; the length of the drum 7 is not shorter than the length of the screen hole area on the screen drum 2 .

In the implementation of this city, the drum 7 is a multi-segment drum segment, and the multi-segment drum segment is divided into two groups. The two groups of drum segments are symmetrically located on both sides of the upper part of the screen drum 2 and are arranged in dislocation. The advantage of this arrangement is that when the drum 7 squeezes the walnuts stuck on the sieve holes, force is applied on both sides of the middle to realize the force balance of the sieve drum 2 and reduce the vibration of the sieve drum 2 . Obviously, the roller 7 can also be a multi-segment roller segment arranged in a straight line, or a long integral roller, and the roller 7 can be a rubber roller or the like.

In this embodiment, the drum 7 is connected to the frame 1 through the swing arm 8, the swing arm 8 is hinged with the frame 1, and the drum 7 is attached to the outer wall of the screen drum 2 by its own gravity; this structure can reduce The core is broken, and the walnuts that are stuck in the sieve hole can be loosened by rotating and squeezing for many times. Obviously, the drum 7 can also be installed in a fixed manner.

As a further improvement, it also includes a self-locking traveling wheel 9 that is rotatably installed at the lower end of the frame 1 to facilitate the transfer and handling of the screening machine.

In this embodiment, the power unit 5 includes a motor 51 installed on the frame 1 , a ring gear 52 sleeved on the drum 7 , a gear ( Not shown in the figure), and drive the pulley mechanism 54 connecting the output shaft of the motor 51 and the gear shaft 53 . Obviously, the power plant 5 can also adopt the structure form of other commonly used power equipment plus transmission.

In this embodiment, the sieve drum 2 is connected to the frame 1 through a tug mechanism, which is similar to the tug structure of a greening machine or a mixer. Obviously, other common rotating installation structures can also be used. The present invention adopts a V-shaped groove tug wheel structure, the tug wheel holds the screen drum 2, the screen drum 2 runs smoothly, and the gear ring 52 does not move left and right when running. , has the advantages of brisk operation and low noise. The running noise of the whole machine of the invention is lower than 75 decibels, and the noise reduction effect is better if the hoist is used to feed the material at a constant speed.

Obviously, the drum can also be located on the side of the screen drum, or on both the upper and the side of the screen drum.

In this embodiment, the optimal rotation parameters are set as follows: the length of the screen cylinder is 6 meters, and the motor (six-stage motor 51, rotating speed 960 rpm) drives the pulley mechanism (the transmission ratio is 1:7.46 rpm), and the pulley mechanism passes through The gear shaft drives the ring gear (the transmission ratio is 1:12), so that the rotation speed of the screen cylinder is 10.27 rpm, the pitch of the screw conveying blades in the screen cylinder is 500mm, and the time for the walnut to reach the outlet from the entrance of the screen cylinder is 1 minute 13 Second, the screening speed can ensure the high efficiency of screening, and can avoid the impact damage of walnuts.

The sieve drum in this embodiment has four sections, and the optimal parameter setting is that the sieve holes of the four sections are φ32mm, φ33mm, φ34 mm, and φ38 mm in sequence; when screening walnuts, the size of the sieve holes is used to determine the grade. It is a small fruit, φ33mm is a medium fruit, φ34mm is a middle fruit, φ38mm is a large fruit, and a φ38mm or more is an extra-large fruit. In practical application, according to the specifications required for fruit selection, the sieves of unneeded specifications can be replaced or closed, and the corresponding screening results can be obtained. The screening efficiency of the invention can reach 3 tons per hour, the screening process is basically free from clogging of the screen holes, the screening efficiency is greatly improved, and the damage rate of walnuts is one thousandth.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. For those skilled in the art, any modifications, equivalent replacements and improvements made to the technical solutions or part of the technical features described in the above-mentioned specific embodiments within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (7)

1. The walnut screening machine comprises a rack, a screen drum rotatably mounted on the rack, a feeding groove fixedly connected to the rack and positioned at a feeding port of the screen drum, a discharging groove fixedly connected to the rack and positioned below the screen drum and at a discharging end, and a power device for driving the screen drum to rotate, wherein the screen drum is divided into multiple sections, the mesh diameter of each section of the screen drum is sequentially increased from the feeding port to the other end, the walnut screening machine is characterized in that spiral conveying blades are arranged on the inner wall of the screen drum, a roller is rotatably arranged on the rack and positioned at the upper part and/or the side part of the outer wall of the screen drum, the axis of the roller is parallel to the screen drum, the wall surface of the roller is close to the outer wall surface of the screen drum, and the length of the roller is not shorter than that of the mesh area on the screen.
2. 2. The walnut screening machine of claim 1, wherein: the self-locking walking wheel is rotatably arranged at the lower end of the frame.
3. 3. The walnut screening machine of claim 1 or 2, wherein: the roller is a plurality of roller sections which are sequentially and rotatably arranged on the frame.
4. 4. The walnut screening machine of claim 1 or 2, wherein: the cylinder is the multistage cylinder section, and the multistage cylinder section divide into two sets ofly, and two sets of cylinder sections symmetry are located a sieve section of thick bamboo upper portion both sides, and dislocation set.
5. 5. The walnut screening machine of claim 1 or 2, wherein: the roller is connected with the frame through a swing arm, the swing arm is hinged with the frame, and the roller is attached to the outer wall surface of the screen drum through self gravity.
6. 6. The walnut screening machine of claim 1 or 2, wherein: the power device comprises a motor arranged on the rack, a gear ring sleeved on the roller, a gear arranged on the rack through a gear shaft and meshed with the gear ring, and a belt wheel mechanism connected with an output shaft of the motor and the gear shaft in a driving mode.
7. 7. The walnut screening machine of claim 1 or 2, wherein: the screen drum is connected with the frame through a tug mechanism.

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